15,674 results on '"LOW-DENSITY LIPOPROTEIN"'
Search Results
2. The comparison of omega-3 and flaxseed oil on serum lipids and lipoproteins in hyperlipidemic male rats
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Shahidi, Siamak, Mahmoodi, Monireh Sufi, Komaki, Alireza, and Sadeghian, Reihaneh
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- 2022
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3. در بیماران مراجعهکننده D بررسی همبستگی بین لیپیدهای سرم و سطح ویتامین به کلینیک سلامت رفسنجان در سال 0011: یک گزارش کوتاه
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- 2025
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4. Optimizing the potentials of field hockey players through complex and contrast training on physiological and biochemical responses.
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Valappil, Ibnu Noufal Kambitta, Vasanthi, Gavoutamane, and Beulah, Sebastian
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In the current scenario of field hockey, players are continuously looking for new ways to improve their performance on the field, particularly in terms of power moves. Throughout this exploration, the current study examined the specific effects of complex and contrast training on field hockey player's physiological and biochemical responses. A total of 45 male field hockey players (mean (SD); weight: 63.62 (4.54) kg, height: 1.67(0.06) cm, and age: 19.42(1.18) yrs.) were randomly assigned to three equal groups namely complex training group (COM), contrast training group (CNST) and control group (CON). All the selected physiological and biochemical outcome measures have been tested baseline (T1) and after 12-weeks of training intervention (T2) assessments. Since the CON group was practicing field hockey every day, they were regarded as an active CON group. The intervention in the given period significantly improved VC and VO
2max , positively impacting respiratory function. However, no notable changes were observed in RHR, HDL, and LDL levels. Forthcoming research may emphasize the refining of intervention protocols to address these areas and further understand the underlying mechanisms for optimal cardiovascular health and performance enhancement for field hockey players. [ABSTRACT FROM AUTHOR]- Published
- 2025
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5. Cytotoxicity, Antiadipogenic, Low‐Density Lipoprotein Oxidation Inhibitory Activities, and Acute Toxicity Study of Psychotria densinervia Hydroethanolic Leaf and Bark Extracts.
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Mba, Jean Romuald, Zouheira, Djamila, Guetchueng, Stephanie Tamdem, Daïrou, Hadidjatou, Djouonzo, Paul Toukam, Ayong, Lawrence, Kuiate, Jules-Roger, Agbor, Gabriel A., and Pohjanvirta, Raimo
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ACUTE toxicity testing ,COPPER sulfate ,TOXICITY testing ,CYTOTOXINS ,LABORATORY rats - Abstract
Background: Obesity is increasingly taking an important stage as a cause of death worldwide, and interventions with a good cost‐effectiveness ratio are needed. Psychotria densinervia is one of these natural products with health benefits. Objective. The present study evaluated the cytotoxicity, antiadipogenic, low‐density lipoprotein (LDL), oxidation inhibitory activities, and acute toxicity of Psychotria densinervia hydroethanolic leaf and bark extracts. Methods: The cytotoxicity evaluation of the extracts (62.5, 125, 250, and 500 μg/mL) using the MTT assay and the antiadipogenic activity (25, 50, 100, and 200 μg/mL) using oleic acid were carried out in SW‐872 cells. Copper sulfate (CuSO4)‐induced oxidation was used in the evaluation of the effect of extracts (0.25, 0.5, and 1 mg/mL) against LDL oxidation. The oral acute toxicity evaluation of a single dose of 2000 mg/kg of the extracts was performed in Wistar albino rats weighing 127 ± 2 g. Results: The leaf and bark extracts did not show any sign of cytotoxicity at the tested concentrations. The best antiadipogenic activity was observed by the standard orlistat (38.45 ± 1.70 μg/mL), followed by the leaf extract (IC50: 41.47 ± 0.50 μg/mL) and the least the bark extract (IC50: 107.50 ± 0.90 μg/mL). At a concentration of 1 mg/mL, the leaf extract presented an oxidation lag time of 130 min, which was higher and better than that of the bark extract (120 min). Quercetin (standard) presented an oxidation lag time longer than 3 h. The oral acute toxicity evaluation did not show any signs of toxicity indicating that the LD50 was greater than 2000 mg/kg. Conclusion: Based on the results obtained, the P. densinervia hydroethanolic leaf extract possesses a better antioxidant and antiadipogenic activities than the bark extract. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Developing a Simple and Feasible Process for the Crude Extraction of Livetins and Phosvitin from Egg Yolk.
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Zhang, Fan, Ding, Yongmei, Zhang, Zipei, Zhu, Hangxin, Jiao, Han, Dong, Shijian, Li, Junhua, Gu, Luping, Chang, Cuihua, Yang, Yanjun, and Su, Yujie
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EGG yolk ,SODIUM alginate ,IONIC solutions ,IONIC strength ,MEMBRANE separation - Abstract
Due to imbalanced demand favoring egg whites, the egg industry faces a surplus of egg yolk, limiting overall growth. This study designed a feasible process for the crude extraction of livetins and phosvitin (PV) and revealed the related separation mechanisms. Our method utilized a 1:9 egg yolk dilution at pH 6.15–6.29, incubated at 4–7.5 °C, to reduce the dispersibility of lipoproteins in the water-soluble fraction (WSF). Adding 0.04–0.05% (w/v) sodium alginate to WSF at pH 5.40 effectively removed suspended low-density lipoprotein (LDL) through electrostatic complexation, increasing livetins electrophoretic bands from 51.90% to 91.04%. The dispersion of the high-density lipoprotein (HDL)-PV complex was jointly affected by NaCl and pH, with phosphocalcic bridges fully disrupted when NaCl concentration exceeded 7.5% (w/v). Na
+ and Ca2+ were adsorbed onto the negatively charged protein surface at pH 5–8, inducing strong hydration repulsion, thereby resulting in the individual dispersion of HDL and PV. Based on the solubility difference in low ionic strength solutions at neutral pH, HDL could be effectively removed after dialysis, increasing PV electrophoretic bands from 8.45% to 61.50%. This simple and feasible separation process may provide a reliable foundation for further purification via membrane filtration and chromatography. [ABSTRACT FROM AUTHOR]- Published
- 2024
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7. Cholic acid enhanced hypercholesterol parameters in high cholesterol diet fed Sprague-Dawley rats.
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Hassan, Azmina, Abdullah, Zuraidah, Tan Niu Jin, and Safuan, Sabreena
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HIGH cholesterol diet , *SPRAGUE Dawley rats , *LDL cholesterol , *CHOLIC acid , *HIGH density lipoproteins , *BLOOD lipids - Abstract
Introduction: Hypercholesterolemia is a condition in which the blood contains elevated levels of low-density lipoprotein (LDL) and non-high-density lipoprotein (HDL). There are varieties of different diets used by different laboratories as a recipe for induction with varying levels of hypercholesterolemia. This study aims to investigate the role of cholic acids in enhancing hypercholesterolemia parameters in Sprague Dawley rats. Methods: Nine Sprague Dawley rats (250 g ± 50 g BW) were used to investigate the most effective diet that is cost-effective for inducing hypercholesterolemia. The rats were randomly divided into 3 groups: normal diet (ND) (n=3), high cholesterol diet (HCD 1), a combination of 2% cholesterol and 0.5% cholic acid (n=3), and high HCD 2, a combination of 2% cholesterol and 30% ghee (n=3). After 4 weeks of feeding, blood samples were collected for lipid profiling, which included total cholesterol (TC), triglycerides (TG), high-density lipoprotein (HDL), and low-density lipoprotein (LDL). The liver, kidney, and brain were removed for histopathological examination using hematoxylin and eosin (H&E) staining. Results: The lipid profile measurements show significant differences between the HCD 1 group for total cholesterol, LDL cholesterol, non-HDL cholesterol, and total cholesterol/ HDL ratio compared to the normal group. HCD 2 shows no significant changes in lipid profiles compared to the normal group. Conclusion: Cholic acid helps in the absorption of cholesterol and enhances the hypercholesterol parameters in diet-induced SD rats based on lipid profile analysis and histology of the liver and kidney. [ABSTRACT FROM AUTHOR]
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- 2024
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8. Impact of Lipid Parameters on Visual Acuity Change in Non-Arteritic Anterior Ischemic Optic Neuropathy.
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Kemchoknatee, Parinee, Arjkongharn, Niracha, and Pongpirul, Krit
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LDL cholesterol , *LOGISTIC regression analysis , *VISUAL acuity , *LOW density lipoproteins , *LIPIDS - Abstract
Purpose: To assess the potential influence of serum biochemical factors, specifically lipid profile parameters, on visual outcomes in patients with non-arteritic anterior ischemic optic neuropathy (NAION). Patients and Methods: All patients diagnosed with NAION at Rajavithi Hospital between 1 January 2011 and 31 December 2020 were retrospectively reviewed. The primary outcome was defined as visual recovery, measured by an improvement of at least 0.2 logarithm of the minimal angle of resolution (logMAR) in their best-corrected visual acuity (BCVA) at the 12-weeks follow-up visit compared to the initial visit and determine whether those lipid profiles parameters are predictive of 12 weeks-visual outcomes. Factors of an initial poor VA were evaluated using logistic regression analysis. Results: In this study, 84 patients with NAION were included to assess the impact of lipid parameters on visual outcomes. Majority of participants were male. The group with initial VA worse than 20/200 had significantly higher mean age of 58.3± 7.6 years and levels of total cholesterol (TC), triglycerides (TG), and low-density lipoprotein cholesterol (LDL) (all p < 0.05 respectively). Throughout 12 weeks, a significant difference in change of BCVA between the two groups of initial VA was observed (p< 0.001). Regarding lipid parameters on visual prognosis, lipid profile between the two groups of VA improvement of 0.2 logMAR was comparable different. The probability of VA improvement showed a weak association with TC levels. A gradual increase in probability slightly related to LDL parameter, while TG showed an inverse relationship. At elevated lipid levels, there was a greater degree of uncertainty in predicting visual outcomes. Conclusion: While older age and elevated lipid levels, specifically TC, TGs, and LDL, were correlated with poorer initial visual acuity in NAION patients, no significant associations were identified between lipid parameters and long-term visual recovery. Early detection for individuals with dyslipidemia (DLP) and advanced age merit attention. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Different effects of low‐ and high‐density lipoproteins in egg yolk on lipid metabolism of mouse: Role of phospholipids‐to‐cholesterol intake ratio.
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Zhang, Fan, Ma, Ying, Zhu, Hangxin, Li, Junhua, Gu, Luping, Chang, Cuihua, Su, Yujie, and Yang, Yanjun
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LIPID metabolism , *LDL cholesterol , *SPHINGOLIPIDS , *LIPOPROTEINS , *PHOSPHOLIPIDS , *EGG yolk - Abstract
Recent evidence increasingly indicates that moderate egg consumption (up to one egg per day) poses no significant risk of cardiovascular diseases in healthy individuals, leading researchers to speculate whether other lipids in eggs affect lipid metabolism. In this research, C57BL/6J mice were given chow diets containing egg yolk low‐density lipoprotein (LDL) and high‐density lipoprotein (HDL), two natural components with different proportions of phospholipids and cholesterol, to explore the effects of the phospholipids‐to‐cholesterol intake ratio on lipid metabolism. Increases in liver weight and liver index were observed following LDL intake, while body weight and epididymal fat decreased after HDL intake in a dose‐dependent manner. The food efficiency of chow diets decreased with increasing phospholipids content. Lipid biomarkers indicated that LDL intake significantly increased plasma LDL cholesterol and liver cholesterol levels. At equivalent cholesterol doses, the cholesterol‐raising effects of HDL were weaker than those of LDL. Higher protein expression of cytochrome P450 family 7 subfamily A member 1 in the HDL groups suggested increased bile acid excretion at higher phospholipids‐to‐cholesterol intake ratios. Fecal metabolite analysis revealed significant changes in lipid composition, primarily involving glycerophospholipids, sphingolipids, and sterol lipids, consistent with the lipid profiles of LDL and HDL. The upregulation of cholic acid and deoxycholic acid in feces further confirmed increased bile acid excretion. This study highlights the differences in lipid metabolism in mice under varying phospholipids‐to‐cholesterol intake ratios, which may be associated with changes in dietary energy supply and bile excretion following phospholipids involvement. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Therapeutic and pharmacological applications of extracellular vesicles and lipoproteins.
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Németh, Krisztina, Kestecher, Brachyahu M., Ghosal, Sayam, Bodnár, Bernadett R., Kittel, Ágnes, Hambalkó, Szabolcs, Kovácsházi, Csenger, Giricz, Zoltán, Ferdinandy, Péter, Osteikoetxea, Xabier, Burkhardt, Ralph, Buzas, Edit I., and Orsó, Evelyn
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EXTRACELLULAR vesicles , *LIPOPROTEINS , *BODY fluids , *STATINS (Cardiovascular agents) , *PROTEINS - Abstract
In recent years, various approaches have been undertaken to eliminate lipoproteins co‐isolated with extracellular vesicles, as they were initially regarded as contaminating entities. However, novel discoveries are reshaping our perspective. In body fluids, these distinct particles not only co‐exist, but also interactions between them are likely to occur. Extracellular vesicles and lipoproteins can associate with each other, share cargo, influence each other's functions, and jointly have a role in the pathomechanisms of diseases. Additionally, their association carries important implications for therapeutic and pharmacological aspects of lipid‐lowering strategies. Extracellular vesicles and lipoprotein particles may have roles in the elimination of each other from the circulation. The objective of this minireview is to delve into these aspects. Here, we show that under certain physiological and pathological conditions, extracellular vesicles and lipoproteins are 'partners' rather than 'strangers' or 'rivals'. [ABSTRACT FROM AUTHOR]
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- 2024
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11. Alarming Signal from the Ear: Tinnitus, a Possible Epiphenomenon of Silent Hyperlipidaemia.
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Piros, Zsuzsanna, Kispál, Kristóf, Szekeres, Réka, Takács, Barbara, Kiss, Rita, Szabó, Adrienn Mónika, Ujvárosy, Dóra, Szabó, Zoltán, Szilvássy, Zoltán, Gesztelyi, Rudolf, and Juhász, Béla
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HIGH density lipoproteins ,IDIOPATHIC diseases ,LIPID metabolism ,CARDIOVASCULAR diseases ,DYSLIPIDEMIA - Abstract
Background/Objectives: Over the past few decades, many studies have been conducted to explore the link between tinnitus and lipid metabolism, yielding inconsistent results. In our current study, we compared the prevalence of various lipid metabolism abnormalities in patients with chronic subjective idiopathic tinnitus (CSIT) to the official prevalence data of dyslipidaemia in the general adult Hungarian population. To counteract the distorting effect of the co-increase in both conditions with age, we also examined this relationship by age groups. Methods: A total of 231 adult patients, suffering from CSIT, who underwent rheological treatment at the Department of Otorhinolaryngology and Head and Neck Surgery of the Clinical Center (University of Debrecen, Debrecen, Hungary), were involved in a retrospective study. Total cholesterol, serum triglycerides, LDL-C, ApoB, HDL-C, ApoA, and Lp(a) were utilized. Results: For the aggregated data, we found that the occurrence of dyslipidaemia among our patients (78.35%) significantly exceeded the corresponding official data about the occurrence of dyslipidaemia in the whole adult Hungarian population (16.51%). This finding was supported by our age-specific approach and the results imply an association between CSIT and dyslipidaemia. This finding suggests an association between CSIT and dyslipidaemia. Conclusions: Considering the relationship between CSIT and dyslipidaemia suggested by our results, tinnitus could be an indicator of dyslipidaemia, even at a young age. Therefore, careful investigation of each tinnitus patient, along with a lipidological evaluation for those with CSIT, may be recommended. This approach could lower mortality from lipid-related diseases, particularly atherosclerosis and its complications, by serving as the first line of defence against a harmful and life-threatening lipid-related conditions. [ABSTRACT FROM AUTHOR]
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- 2024
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12. The Causal Relationship Between Choline Metabolites and Acute Acalculous Cholecystitis: Identifying ABCG8 as Colocalized Gene.
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Gao, Yuntong, Mao, Kun, Yang, Congying, Wang, Xisu, Liu, Shixuan, Ma, Zimeng, Zhai, Qi, Shi, Liang, Wu, Qian, and Zhang, Tianxiao
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Background: Acute acalculous cholecystitis (AAC) is a type of cholecystitis with high mortality rate while its pathogenesis remains complex. Choline is one of the essential nutrients and is related to several diseases. This study aimed to explore the causal relationship between choline metabolites and AAC and its potential mechanisms. Methods: This research utilized the two-sample Mendelian randomization method to investigate the causal relationship between choline metabolites and AAC. Additionally, multivariable Mendelian randomization and mediated Mendelian randomization were used to explore potential confounding effects from low-density lipoprotein (LDL), high-density lipoprotein (HDL), triglycerides (TGs), and coronary artery disease (CAD). Linkage disequilibrium score regression (LDSC), co-localization analysis, and enrichment analysis were used to investigate relevant molecular mechanisms. Results: There is a negative causal relationship between total choline (OR [95%CI] = 0.9982 [0.9974, 0.9990], p = 0.0023), phosphatidylcholine (OR [95%CI] = 0.9983 [0.9976–0.9991], p = 0.0040), sphingomyelin (OR [95%CI] = 0.9980 [0.9971–0.9988], p = 0.0001), and AAC. The mediating effects of LDL were −0.0006 for total choline, −0.0006 for phosphatidylcholine, and −0.0008 for sphingomyelin, indicating a protective effect of total choline, phosphatidylcholine, and sphingomyelin on AAC. Colocalized SNP rs75331444, which is mapped to gene ABCG8, was identified for total choline (PPH4 = 0.8778) and sphingomyelin (PPH4 = 0.9344). Conclusions: There is a causal relationship between choline metabolites and cholecystitis, mediated through the protective action of LDL. Our results suggest that ABCG8 may play a role in the development of non-calculous cholecystitis. [ABSTRACT FROM AUTHOR]
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- 2024
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13. Patterns and Factors Associated with Dyslipidemia Among Patients with Diabetes Mellitus Attending Hoima Regional Referral Hospital, Uganda
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Hirsi AM, Abdi AA, Peris A, Jacinto A, Muhammad P, Nur IA, Mohamud MH, Hussein M, Qaws A, and Jayte M
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diabetes mellitus ,dyslipidemia ,total cholesterol ,low-density lipoprotein ,coronary heart disease ,risk factors ,uganda. ,Medicine (General) ,R5-920 - Abstract
Abishir Mohamud Hirsi, Awil Abdukadir Abdi, Alina Peris, Amandua Jacinto, Propser Muhammad, Ibrahim Ahmed Nur, Muktar Hassan Mohamud, Mustafa Hussein, Abdi Qaws, Mohamed Jayte Department of Internal Medicine, Faculty of Clinical Medicine and Dentistry, Kampala International University, Ishaka, Bushenyi, UgandaCorrespondence: Abishir Mohamud Hirsi, Email abshir.heirsi@gmail.comBackground: Dyslipidemia in Sub-Saharan Africa has been on the disproportionate rise among diabetes patients across various contextual settings due to its patterns and associated factors. This study determined the patterns and factors associated with dyslipidemia among diabetes patients attending Hoima Regional Referral Hospital (HRRH).Methods: This was a hospital-based cross-sectional study conducted at HRRH between October 2022 and January 2023, enrolled 375 adult diabetes patients consecutively from diabetic outpatient clinic. Data on socio-demographic, behavioral, medical history, physical examination, and laboratory diagnoses were collected and summarized using descriptive statistics. Patterns of dyslipidemia were presented as a proportion of each lipid profile either singly or in combination expressed as a percentage. In the bivariate analysis, variables with p-values < 0.2, crude odds ratios of ≥ 2 or ≤ 0.5, or those with biological plausibility were included in a multiple logistic regression model. Factors with p-values < 0.05 were considered statistically significant. All analyses were conducted using Stata version 17.Findings: Of the 375 diabetes patients, 260 (69.3%) had abnormal total cholesterol (TC), and 185 (49.3%) had two lipid profile abnormalities. The majority of the patients were female, 235 (62.7%), and 38 (10.1%) had a diagnosis of coronary heart disease (CHD). Additionally, 134 (35.7%) were overweight, and 39 (10.4%) were obese. Female patients had higher odds of dyslipidemia (Adjusted Odds Ratio [AOR] = 2.2, 95% CI: 1.02– 4.86, p = 0.045). Those with coronary heart disease (CHD) had increased odds of dyslipidemia (AOR = 4.1, 95% CI: 1.51– 11.07, p = 0.006). All diabetes patients who were overweight or obese had dyslipidemia (p < 0.001).Conclusion: The most common pattern of dyslipidemia in patients with diabetes was elevated total cholesterol, followed by high low-density lipoprotein, associated with overweight, obesity, female gender, and CHD. Routine screening of lipid profiles, BMI, and CHD in diabetic clinics is crucial for early intervention and improved outcomes.Keywords: diabetes mellitus, dyslipidemia, total cholesterol, low-density lipoprotein, coronary heart disease, risk factors, Uganda
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- 2025
14. Prospective Association of Occupational and Leisure-Time Physical Activity With Cardiovascular Risk Factors in Early Adulthood: Findings From Pelotas (Brazil) 1982 Birth Cohort.
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de Lucena Alves, Charles Phillipe, Crochemore-Silva, Inácio, Lima, Natália P., Coenen, Pieter, and Horta, Bernardo Lessa
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CARDIOVASCULAR diseases risk factors ,PHYSICAL activity ,DIASTOLIC blood pressure ,COHORT analysis ,ADULTS ,DYSLIPIDEMIA - Abstract
Background: The benefits of physical activity in health outcomes are well established. However, recent evidence suggests that benefits may differ by domain and population. Thus, we aimed to investigate the prospective association of occupational (OPA) and leisure-time physical activity (LTPA) with cardiovascular risk factors. Methods: In 1982, the maternity hospitals of Pelotas were visited daily; those live births whose families lived in urban areas were evaluated, and their mothers were later interviewed (n = 5914). In the 2004/5 follow-up (23 y old), both OPA and LTPA were measured in 4295 participants using their respective sections of the International Physical Activity Questionnaire. In the 2012 follow-up (30 y old), the following cardiovascular risk factors were collected: high-density lipoprotein (in milligrams per deciliter), low-density lipoprotein (in milligrams per deciliter), triglycerides (in milligrams per deciliter), glucose (in milligrams per deciliter), and blood pressure (in millimeters of mercury). Multivariable linear regressions were performed to evaluate associations between OPA and LTPA with these specific cardiovascular risk factors. Results: In total, 3241 participants were analyzed. Our main findings suggest that there was no association between OPA and LTPA with high- and low-density lipoprotein. There were inverse associations between OPA and lower levels of triglycerides among males (β = −0.002; 95% confidence interval, −0.003 to −0.000) and positive associations between LTPA and higher levels of diastolic blood pressure among females (β = 0.111; 95% confidence interval, 0.005–0.216). Conclusion: In conclusion, our findings suggest that there was no association, or association with limited clinical relevance, of OPA and LTPA with cardiovascular risk factors in early adulthood. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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15. High-Precision Fluorescence Platform for Point-of-Care Measurements of Low-Density Lipoprotein Based on Nitrogen, Sulfur-Doped Graphene Quantum Dots and Ferric Tetroxide @ Reduced Graphene Oxide.
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Liang, Jintao, Yu, Tingting, Tan, Xiaohong, Jiang, Lizhi, He, Wei, Zhan, Yulian, Huang, Yong, Zhou, Zhide, and Li, Guiyin
- Abstract
Effective detection of biomarkers related to atherosclerosis (AS) is of great importance in clinic. High concentration of low-density lipoprotein (LDL) is one of the most dangerous factors leading to AS, which can be used as a target for diagnosis of AS. In this paper, a fluorescence platform for high-precision detection of LDL was constructed with ferric tetroxide @ reduced graphene oxide (Fe
3 O4 @rGO) nanosheets as fluorescence quencher and low-density lipoprotein aptamer (Apt) labeled with nitrogen, sulfur-doped graphene quantum dots (N,S-GQDs-Apt) as fluorescence donor. Owing to the physical adsorption and van der Waals forces between Fe3 O4 @rGO nanosheets and the Apt, the N,S-GQDs-Apt was close to Fe3 O4 @rGO nanosheets, resulting in fluorescence resonance energy transfer (FRET), and the fluorescence of N,S-GQDs-Apt was quenched. In the presence of LDL, LDL bound to Apt leads to N,S-GQDs detachment from Fe3 O4 @rGO nanosheets and suppresses the FRET, resulting in the recovery of fluorescence of N,S-GQDs. Under the optimum conditions, the fluorescence recovery is logarithmic linear with the concentration of LDL in the range of 0.1 ~ 10.0 μg mL−1 , with R2 of 0.9922 and the detection limit of 0.015 ng mL−1 (s/n = 3). In the experiment using actual human serum, the recovery is high from 91 to 117%. This platform can be used for the diagnosis of early AS and provide reference for the detection of other markers. [ABSTRACT FROM AUTHOR]- Published
- 2025
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16. The association between serum vitamin D levels and abnormal lipid profile in pediatrics: A GRADE-assessed systematic review and dose–response meta-analysis of epidemiologic studies.
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Hajhashemy, Zahra, Tirani, Shahnaz Amani, Askari, Gholamreza, and Saneei, Parvane
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Context Several studies have investigated the relationship between serum vitamin D and dyslipidemia in children and adolescents, but the findings have been contradictory. Objective The current systematic review and dose–response meta-analysis investigated the serum vitamin D – dyslipidemia relationship in children and adolescents. Data Sources ISI Web of Science, Scopus, MEDLINE (PubMed), EMBASE databases, and Google Scholar, were searched up to December 2022. Data Extraction Observational studies that investigated the odds of dyslipidemia in categories of serum vitamin D levels in children were included, and their data were extracted. Data Analysis Pooling of 17 effect sizes from 15 studies (39 342 participants) showed that subjects with higher serum vitamin D had 27% lower odds of hypertriglyceridemia (odds ratio [OR] = 0.73; 95% confidence interval [CI]: 0.60, 0.88). A meta-analysis of 18 effect sizes from 16 studies (39 718 participants) illustrated that highest vs lowest serum vitamin D was related to 22% lower odds of low high-density lipoprotein cholesterol (HDL-c) (OR = 0.78; 95% CI: 0.66, 0.91). Also, a nonlinear association between serum vitamin D and odds of abnormal lipid profile was found: elevating values of 25-hydroxyvitamin D from 35 nmol/L to 55 nmol/L was associated with a decreasing trend in odds of hypertriglyceridemia, hyper low-density lipoprotein cholesterolemia, hypercholesterolemia, and hypo HDL-cholesterolemia. However, no significant linear association was observed. Based on the Grading of Recommendations, Assessment, Development and Evaluations (GRADE), the certainty of all evidence was rated as high. Conclusion This meta-analysis revealed that the level of 25-hydroxyvitamin D was inversely related to odds of abnormal serum triglycerides and HDL-c in children and adolescents. Increasing serum vitamin D from 35 nmol/L to 55 nmol/L was associated with a decreasing trend in the odds of abnormal serum triglycerides, HDL-c, low-density lipoprotein cholesterol, and total cholesterol in children. Systematic Review Registration PROSPERO registration no. 42023400787. [ABSTRACT FROM AUTHOR]
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- 2025
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17. Normal caloric intake with high-fat diet induces metabolic dysfunction-associated steatotic liver disease and dyslipidemia without obesity in rats
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Mateusz Szudzik, Tomasz Hutsch, Dawid Chabowski, Mikołaj Zajdel, and Marcin Ufnal
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Diet ,MASLD risk factors ,PCSK9 ,Liver steatosis ,Cholesterol metabolism ,Low-density lipoprotein ,Medicine ,Science - Abstract
Abstract Excessive caloric intake and obesity due to high-fat (HFD) and high-disaccharide (HDD) diets have been recognized as major contributing factors to dyslipidemia and metabolic dysfunction-associated steatotic liver disease (MASLD). However, the effect of HFD and HDD without excessive caloric intake is obscure. The aim of the study was to evaluate the effect of physiological caloric intake delivered through HFD and HDD on liver and lipid profiles. The study was performed on 6-week-old male and female (50/50%) Sprague Dawley rats, receiving either a standard (controls, n = 16), HFD (n = 14) or HDD (n = 14) chow. All groups received the same, standard daily calorie rations, titrated weekly to the age of growing rats, for 12 weeks. A panel of metabolic in vivo measurement were performed, followed by histological, biochemical and molecular biology assays on tissues harvested from sacrificed rats. There was no significant difference between the groups in body weight. In contrast to controls, HFD and HDD groups showed metabolic dysfunction-associated steatohepatitis (MASH) characterized by liver steatosis, inflammation, ballooning of hepatocytes and fibrosis. These changes were more pronounced in the HFD than in the HDD group. The HFD group showed significantly higher serum LDL than controls or HDD rats. Furthermore, the HFD group had higher liver protein levels of low-density lipoprotein receptor (LDLR) but lower plasma levels of proprotein convertase subtilisin/kexin type 9 (PCSK9) than the controls or HDD group. There were no differences between sexes in evaluated parameters. The excessive caloric intake and obesity are not prerequisites for the development of MASH and dyslipidemia in rats. The liver changes induced by the HFD and HDD diets exhibit differences in severity, as well as in the expression patterns of LDLR and PCSK9. Notably, these effects are independent of the sex of the rats.
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- 2024
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18. Comparison of ten formulae for calculating low-density lipoprotein cholesterol with direct low-density lipoprotein cholesterol measurement
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Suriyan S. Nair, Reshma Kiran, K. K. Jisna, M. B. Prathima, P Sushith, and Janice D’sa
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cholesterol ,lipoproteins ,low-density lipoprotein ,Medicine - Abstract
Background Accurate lipid profile assessment, mainly low-density lipoprotein cholesterol (LDL-C) measurement, is crucial for diagnosing and managing cardiovascular disease (CVD). The widely used Friedewald formula for LDL-C calculation has limitations, prompting the exploration of alternative equations. Aims This study aims to compare ten LDL-C calculation formulas with direct measurement among study participants attending a tertiary care centre. Materials and Methods Conducted from September 2021 to July 2022 at a tertiary healthcare centre in India, the study involved 114 participants aged 18 years or older. The exclusion criteria were high-serum triglyceride (TG) levels, renal failure, diabetes, liver diseases or unwillingness to participate. Blood samples were analysed for total cholesterol, TG, high-density lipoprotein cholesterol and LDL-C. The very-low-density lipoprotein cholesterol level was calculated. The LDL-C formulas evaluated were Friedewald, Anandaraja, De Cordova, Vujovic, Ahmadi, Puavillai, Chen, Hattori, Martin–Hopkin and Sampson. Results Vujovic’s formula showed a negligible mean difference and strong correlation (r = 0.916, P < 0.001) with direct LDL-C estimation across TG concentrations. Sampson’s formula performed best for TG
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- 2024
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19. Evaluation of the Prevalence and Pattern of Dyslipidemia in Newly Detected Type 2 Diabetes Mellitus Patients and Nondiabetic Controls
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Vikram Singh Shekhawat, Vineet Behera, Akshay Kumar Nayak, Kiran Deep Kamal, Ananthakrishnan Ramamoorthy, Ritu Ranjan Kumar, and Sudeep Kumar Roy
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dyslipidemia ,hemoglobin a1c ,high-density lipoprotein ,low-density lipoprotein ,type 2 diabetes mellitus ,Naval Science ,Medicine - Abstract
Introduction: Dyslipidemia comprises disorders of lipoprotein metabolism, which is usually characterized by increased plasma levels of total cholesterol (TC), triglycerides (TG), low-density lipoproteins (LDL), or reduced plasma level of high-density lipoprotein (HDL). Dyslipidemia is commonly found in Type 2 Diabetes Mellitus (T2DM) patients causing an increased risk of atherosclerosis and cardiovascular disease. Many studies done previously show variable prevalence of dyslipidemia (68 to 85 %) in known diagnosed patients of T2DM (with unknown history of onset), however, only limited studies have been done for finding prevalence of dyslipidemia in newly detected T2DM patients. AIM: This study is a cross-sectional observational study done in a tertiary care hospital in Mumbai (India), aiming to study prevalence and pattern in newly detected T2DM patients. The secondary objective is to compare the prevalence and pattern of dyslipidemia in newly detected T2DM patients with non-diabetic controls. Material and Method: For this, 100 newly detected T2DM patients were chosen along with 100 cases of age & gender-matched non-diabetic controls. Their clinical profile and lipid profile of both groups were observed and compared. Result: Results showed higher prevalence of dyslipidemia in newly detected T2DM patients (64%) which was significantly more than the control group (32%). Moreover, the pattern of dyslipidemia showed greater mean levels of TC, TG, and LDL and low mean levels of HDL in T2DM patients compared to the control group. Conclusion: These findings show that there is an increased risk of Dyslipidemia in new onset T2DM patients.
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- 2024
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20. Fluctuations in serum lipid levels during neoadjuvant treatment as novel predictive and prognostic biomarkers for locally advanced breast cancer: a retrospective analysis based on a prospective cohort
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Xinru Chen, Yingying Zhao, Yaohui Wang, Yumei Ye, Shuguang Xu, Liheng Zhou, Yanping Lin, Jingsong Lu, and Wenjin Yin
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Breast cancer ,Lipid metabolism ,Low-density lipoprotein ,Body mass index ,Prognosis ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Background With increasing attention given to host-specific lipid metabolism status, it is of urgent need to identify lipid metabolism indices with predictive or prognostic value in locally advanced breast cancer patients treated with neoadjuvant chemotherapy (NAC), and to evaluate the performance improvement by incorporating them into the existing Neo-Bioscore staging system. Methods Patients from a prospectively maintained database of locally advanced breast cancer patients who received radical surgery after NAC between January 2014 to December 2020 were enrolled in this study. The enrolled patients were randomly divided into a training set and a test set at a ratio of 6:4. The random forest algorithm was applied to rank the importance of prognostic factors, top-ranked lipid metabolism indices of which were then incorporated into Neo-Bioscore to construct an updated prognostic model. The performances of these two models were compared in both training set and test set from multiple perspectives. Study outcomes included disease-free survival (DFS), relapse-free survival (RFS), distance-recurrence-free survival (DRFS), locoregional-recurrence-free survival (LRFS) and overall survival (OS). Results A total of 200 eligible patients were included in this study. After a median follow-up of 4.73 years, it was demonstrated that the relative increase in total cholesterol (TC; DFS: HR = 4.782, 95%CI 1.410 ~ 16.217, P = 0.012) and low-density lipoprotein (LDL; DFS: HR = 4.622, 95%CI 1.517 ~ 14.088, P = 0.007) during NAC led to poorer survival outcomes. Patients with either a higher body mass index (BMI) or elevated LDL during NAC had a worse prognosis (DFS: HR = 6.351, 95%CI 1.938 ~ 20.809, P = 0.002; OS, HR = 6.919, 95%CI 1.296 ~ 36.932, P = 0.024). Incorporating BMI and LDL fluctuations during NAC into Neo-Bioscore improved the prognostic stratification, especially in terms of LRFS (P = 0.046 vs. P = 0.65) and OS (P = 0.013 vs. P = 0.61). Multidimensional evaluation confirmed the improvement in model fit and clinical use for the updated model in both training set and test set. Conclusions This is the first study to illustrate the relative elevation of LDL and TC levels during NAC as independent prognosticators for locally advanced breast cancer. This is also the first attempt to incorporate lipid metabolism indices into the original Neo-Bioscore staging system, which further improves the prognostic stratification of patients receiving NAC.
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- 2024
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21. Association of HDL and LDL levels with osteoporosis in rheumatoid arthritis: a retrospective cohort study
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Zong Jiang, Xiaoling Yao, Weiya Lan, Wukai Ma, Xueming Yao, and Tang Fang
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Rheumatoid arthritis ,High-density lipoprotein ,Low-density lipoprotein ,Osteoporosis ,Correlation ,Medicine - Abstract
Abstract Objectives A correlation exists between lipids and osteoporosis (OP), as well as between lipids and rheumatoid arthritis (RA). However, lipids, the relationship between RA and OP is still unclear. This study mainly investigates the relationship between lipid levels and OP risk in RA patients. Methods Retrospective collection of RA patient data from July 2017 to May 2022, encompassing baseline demographics, treatment regimens, laboratory results, and bone mineral density (BMD) measurements. Analyses, stratified by BMD subgroups, were conducted using propensity score matching (PSM) based on age, sex, and baseline duration, and binary logistic regression to examine the interplay between lipoprotein levels and other risk factors. The relationship between continuous variables and OP risk was assessed using restricted cubic spline (RCS), followed by a reanalysis of the correlation between varying lipoprotein levels and different factors, segmented according to RCS-determined cutoffs. Results The study included 2673 RA patients. Binary logistic regression revealed significant associations between high-density lipoprotein (HDL), low-density lipoprotein (LDL), and RA–OP (p
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- 2024
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22. The Prevalence of Different Genotypic Forms of Familial Hypercholesterolemia in Relation to Race and Ethnicity
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Makhabbat Bekbossynova, Tatyana Ivanova-Razumova, Aknur Kali, Aliya Sailybayeva, Sadyk Khamitov, and Zhansaya Oralbekova
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Familial hypercholesterolemia ,cardiovascular disease ,low-density lipoprotein ,genes ,Internal medicine ,RC31-1245 ,Specialties of internal medicine ,RC581-951 - Abstract
In the present study, a systematic literature review was conducted to examine the prevalence of homo- and heterozygous forms of Familial hypercholesterolemia among different racial and ethnic groups. Familial hypercholesterolemia (FH) is an inherited disorder characterised by elevated blood levels of cholesterol and low-density lipoprotein (LDL), which increases the risk of cardiovascular disease. Databases PubMed, Web of Science, and Elsiever were searched and only peer-reviewed articles with a large number of contributors and sufficient prevalence and ethnicity data were included. Diagnosis of FH was based on genetic testing or clinical criteria. The results of the study indicate inadequate and untimely diagnosis of FH, resulting in inadequate treatment. To date, only 9% of countries have statistical data on the prevalence of FH in the general population. In order to develop effective prevention strategies for cardiovascular diseases associated with FH, further research is needed to obtain accurate epidemiological data, including the race and ethnicity of patients. This will allow optimisation of strategies to reduce the burden of preventable cardiovascular disease associated with FH.
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- 2024
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23. Systematic review on Vitamin D supplement on hypercholesterolemia and coronary artery disease outcomes
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Syed Azizur Rahman and Satwat Maitra
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coronary artery disease ,high-density lipoprotein ,hypercholesterolemia ,low-density lipoprotein ,total cholesterol ,triglyceride cholesterol ,vitamin d supplement ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Globally, Vitamin D insufficiency is a problem that has a considerable impact on people’s health. According to recent studies, Vitamin D may potentially have positive impacts on serum lipid profiles, enhancing coronary condition. Therefore, the main aim of the present review is to examine Vitamin D supplement on hypercholesterolemia and coronary artery disease (CAD). We conducted a comprehensive literature search from 2012 to 2023, comprising Medline, Web of Science, PubMed, Cochrane Library, and additional sources such as Google Scholar and clinicaltrials.gov. We reviewed a wide range of study types, including studies, trials, commentaries, and editorials. To assess bias, we used a recommended methodology, utilizing a two-part tool to address five specific domains: Selection bias, performance bias, attrition bias, selective reporting, and other biases. We also employed a quality assessment tool for evaluating the quality of diagnostic accuracy studies. In this review, we incorporated 11 studies. The mean age of the cases was 60.11 years. The Vitamin D supplement mean dose was 8772.42 IU/day. The Vitamin D supplement group showed mean variations in high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), triglyceride (TAG) cholesterol, and total cholesterol levels of 3.3 mg/dl, 8.6 mg/dl, 10.625 mg/dl, and 9.45 mg/dl, correspondingly. Whereas, the mean variation in HDL-C, LDL-C, TAG as well as total cholesterol levels in the placebo group was 4.185714 mg/dl, 2.60825 mg/dl, 6.50625 mg/dl, and 6.2875 mg/dl, respectively. Vitamin D supplementation demonstrated enhancements in serum levels of total cholesterol, LDL-C, HDL-C, and TAGs. Clinical tests for hypercholesterolemia should be implemented on patients at risk for heart illness and CAD, and Vitamin D supplements are beneficial. For individuals who are Vitamin D deficient, doctors may think about supplementing their routine cholesterol therapies with Vitamin D.
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- 2024
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24. Decreased plasma in basal cell cancer.
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OZ KAYMAZ, Cemile, YILMAZ, Necat, and EREN, Esin
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BASAL cell carcinoma , *HIGH density lipoproteins , *LIPID metabolism , *PRECANCEROUS conditions , *PARAOXONASE - Abstract
Aim Basal cell carcinoma (BCC) is one of the most common malignant non-melanoma carcinomas and is an important health problem for all countries. There are many studies on the effect of human lipoprotein metabolism and high-density lipoprotein (HDL-C) function on skin cells, but there are no detailed clinical studies on BCC yet. In addition, higher phospholipid and cholesterol content was found in cancerous and precancerous lesions of the skin compared to normal tissue. The aim of our study was to evaluate the lipid profile in patients with BCC and to try to find any relationship between BCC and molecules that have an important place in HDL-C functionality. Methods The patient group consisted of 39 patients who were clinically diagnosed with BCC by biopsy in hospital clinics. The control group (n:44) was randomly selected from patients of the same age group without a diagnosis of BCC who applied to different clinics of the same hospital. Routine lipid level, Apolipoprotein A1 (Apo-A1) level and Paraoxonase (PON-1) enzyme measurements were made from serum samples taken from the patients and control groups participating in the study. Results The most important findings of this study, a statistically significant decrease in serum Apo-A1 level and a decrease trend in PON-1 enzyme can be considered in BCC patients compared to control groups. Conclusion Lipid metabolism and HDL functionality, may play a role in the development of BCC. [ABSTRACT FROM AUTHOR]
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- 2024
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25. Simulation of plaque formation in a realistic geometry of a human aorta: effects of endothelial layer properties, heart rate, and hypertension.
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Benvidi, Amirabbas and Firoozabadi, Bahar
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CARDIOVASCULAR system , *FOAM cells , *SUBCLAVIAN artery , *BLOOD pressure , *HEART cells - Abstract
Nowadays, cardiovascular diseases are the most common cause of death worldwide. Besides, atherosclerosis is a cardiovascular disease that occurs with persistent narrowing of arteries, especially medium and large-sized arteries. Atherosclerosis begins with a local elevation in the permeability of the arterial wall as a result of endothelial inflammation. Subsequently, excess LDL permeates into the arterial wall. Then, through several chemical responses and reactions, foam cells are produced. These foam cells serve as a crucial indicator for assessing the development of atherosclerosis within the arteries. In this study, the effect of endothelial layer modeling, heart rate (HR) and hypertension on the foam cell accumulation is numerically investigated in a patient-specific geometry of the human thoracic aorta. Navier–Stokes, Darcy, and mass transfer equations are used to obtain the velocity and concentration field within the domain. Regarding the dependence of endothelial cell properties on time-averaged wall shear stress, it is observed that foam cells are mainly concentrated in the outer curvature of the aortic arch, downstream of the left subclavian artery. However, considering oscillatory-shear-rate as the determinant of endothelial cell properties leads to the accumulation of foam cells in the inner curvature of the descending aorta. Regarding the HR, with the increase of HR, the volume average concentration of the foam cell decreases. However, there is no substantial difference between the cases of different HRs. Moreover, foam cell concentration significantly increases in the hypertension case. This result implies that a slight increase in the blood pressure may induce irreparable problems in the circulatory system. [ABSTRACT FROM AUTHOR]
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- 2024
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26. Effect of Atherogenic Index of Plasma on Pre-Percutaneous Coronary Intervention Thrombolysis in Myocardial Infarction Flow in Patients With ST Elevation Myocardial Infarction.
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Aydınyılmaz, Faruk, Özbeyaz, Nail Burak, Guliyev, İlkin, Algül, Engin, Şahan, Haluk Furkan, and Kalkan, Kamuran
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ATHEROSCLEROSIS risk factors , *RISK assessment , *PREDICTIVE tests , *STATISTICAL correlation , *PEARSON correlation (Statistics) , *THROMBOLYTIC therapy , *HYPERLIPIDEMIA , *RECEIVER operating characteristic curves , *CORONARY circulation , *LIPOPROTEINS , *TREATMENT effectiveness , *CARDIOVASCULAR diseases risk factors , *DESCRIPTIVE statistics , *RETROSPECTIVE studies , *ODDS ratio , *VASCULAR resistance , *PERCUTANEOUS coronary intervention , *RESEARCH , *MEDICAL records , *ACQUISITION of data , *TRIGLYCERIDES , *DATA analysis software , *ST elevation myocardial infarction , *BIOMARKERS , *SENSITIVITY & specificity (Statistics) , *DISEASE complications - Abstract
Dyslipidemia is an important risk factor for cardiovascular morbidity and mortality. Although low-density lipoprotein (LDL) is primarily responsible, the importance of triglyceride (TG) and high-density lipoprotein (HDL) has also been recognized. The present study investigated the effect of the atherogenic index of plasma (AIP), in which atherogenic and protective lipoproteins were evaluated together, on the initial flow in patients with ST elevation myocardial infarction. AIP was calculated as log(TG/HDL-cholesterol). Patients included in the study (n = 1535) were divided into Thrombolysis in Myocardial Infarction (TIMI) flow grade 0 and >0. AIP was found to be significantly different between 2 groups (.55 ±.23 vs.67 ±.21; P <.001). AIP was an independent predictor for pre-intervention TIMI flow (Odds Ratio: 2.778). A moderate correlation was found between TIMI frame count measurements, calculated in patients with TIMI 2–3, and AIP (Pearson correlation coefficient:.63, P <.001). In the receiver operating characteristic analysis, AIP showed the highest area under curve (AUC) compared with other lipid parameters for predicting vascular patency. The AUC of AIP was.634, the cut-off value was.59, and the sensitivity and specificity were 67.6% and 68.4%, respectively (P <.001). In conclusion, AIP was found to be an important marker affecting pre-percutaneous coronary intervention TIMI flow. [ABSTRACT FROM AUTHOR]
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- 2024
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27. The Predictive Utility of Circulating PCSK9 Levels on Diabetic Retinopathy Stage.
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Karapapak, Murat, Kara, Zeynep Mine Yalçınkaya, and Düzgün, Eyüp
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TYPE 2 diabetes , *DIABETIC retinopathy , *PEOPLE with diabetes , *AGE groups , *DIABETES - Abstract
Purpose: To investigate the value of proprotein-converting subtilisin kexin type 9 (PCSK9) levels in type 2 diabetes mellitus (T2D) patients with different stages of diabetic retinopathy (DR) and to compare these findings with a healthy control group without diabetes mellitus (DM). Methods: A total of 135 patients, 100 of whom were patients with T2D and 35 of whom were in the health control group, were included in this prospective study. T2D patients were divided into three groups: the first group included 34 people with T2D without DR, the second group had 32 people with non-proliferative DR (NPDR), and the third group had 34 people with proliferative DR (PDR). Serum PCSK9 levels were analyzed and compared between the groups. Results: Forty-nine percent of the participants were female, and the mean age was 64 ± 9.1 years, with no statistically significant results between the four groups in terms of age and sex. The mean serum PCSK9 value was significantly different (p = 0.01) when all groups were evaluated, and statistically significant change was observed with the progression of DR. When serum PCSK9 levels were evaluated in all T2D patients (groups 1, 2, and 3), a medium-level correlation was observed with low-density lipoprotein (p < 0.05). Conclusion: Serum PCSK9 values differed significantly in diabetic patients compared to the control group. One should be clinically cautious about the usefulness of circulating PCSK9 concentrations as an indicator of the risk of diabetic retinopathy. [ABSTRACT FROM AUTHOR]
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- 2024
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28. Obicetrapib—the Rebirth of CETP Inhibitors?
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Chang, Bliss, Laffin, Luke J., Sarraju, Ashish, and Nissen, Steven E.
- Abstract
Purpose of Review: To provide perspective on the current development status, and potential future role, of obicetrapib, a third-generation cholesterylester transfer protein (CETP) inhibitor. Obicetrapib has received recent attention following positive Phase II clinical trial data and initiation of Phase III trials for the treatment of dyslipidemia and atherosclerotic cardiovascular disease (ASCVD). Recent Findings: The ROSE and ROSE2 trials are Phase II studies that examined the lipid lowering effects of obicetrapib in patients on pre-existing high-intensity statin therapy. Obicetrapib significantly reduced key dyslipidemia biomarkers including low density lipoprotein cholesterol (LDL-C), Apolipoprotein B (Apo B), and non-high-density lipoprotein cholesterol (non-HDL-C) while increasing high-density lipoprotein cholesterol (HDL-C). Four phase III clinical trials, including a cardiovascular outcomes trial, are ongoing. Summary: Preliminary data for obicetrapib shows favorable effects on dyslipidemia, which could theoretically lead to a decrease in ASCVD clinical events. Short-term safety data in preliminary studies shows no significant safety signals. [ABSTRACT FROM AUTHOR]
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- 2024
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29. THE ANALYSIS OF THE FLOW OF BLOOD IN A STENOSED ARTERY THROUGH SIMULATION: A COMPARISON AMONG VARIOUS NON-NEWTONIAN MODELS.
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SHANKAR NARAYAN, S., BHATTACHARJEE, ANURADHA, SAHA, SUNANDA, PUNEETH, VENKATESH, SINGHAL, ABHINAV, and SAYFUTDINOVNA ABDULLAEVA, BARNO
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HEMORHEOLOGY , *BLOOD flow , *KINETIC energy , *FOURIER series , *CORONARY artery disease , *NON-Newtonian flow (Fluid dynamics) - Abstract
This paper focuses on the dual quality of blood, Newtonian and non-Newtonian, in particular by exploring the energy curves. Careful investigation of the dual property of blood has been made by considering two different geometries to represent a stenosed arterial segment. We present a cautious assessment of non-Newtonian blood rheology impacts in arterial stream simulations by coupling the Newtonian and non-Newtonian models. The flow of energy through the two flow dimensions is meticulously investigated using velocity (kinetic energy), pressure, and wall shear stress (pressure energy). Besides, the proper implementation of an interface boundary condition (IBC) was emphasized to ensure consistency with the flow conditions downstream of a backward-facing step. The integration of the Newtonian and non-Newtonian models adjoins the novelty of the current research. The energy curves are obtained by implementing five different non-Newtonian models to designate a suitable non-Newtonian model for blood flow investigations. The combination of the non-Newtonian models enforced in this research is novel and particular attention is paid to the energy curves obtained. The conclusion was to elect the Carreau model as a suitable non-Newtonian rheological model for the blood flow study. This study was able to finalize the fact that the coupling of Newtonian and non-Newtonian models is necessary to obtain accurate results. For the sinusoidal waveform considered for the velocity, Carreau and the Power law models yield better results, eliminating the other non-Newtonian models from the list. With a better inlet condition imposed in the form of the Fourier series for pressure and velocity, the Carreau model yields the best results. [ABSTRACT FROM AUTHOR]
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- 2024
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30. COMPARISON OF FRIEDEWALD, MARTIN/HOPKINS, AND SAMPSON FORMULAE WITH DIRECT LDL MEASUREMENT IN HYPERLIPIDAEMIC AND NORMOLIPIDAEMIC ADULTS IN A TURKISH POPULATION.
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Alpdemir, Medine, Alpdemir, Mehmet Fatih, and Şeneş, Mehmet
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TURKS , *LDL cholesterol , *CLINICAL biochemistry , *HDL cholesterol , *LOW density lipoproteins - Abstract
Background: In our study, we aimed to compare the Friedewald, Martin/Hopkins, and Sampson formulae with direct LDL-cholesterol (d-LDL-C) measurement. Methods: The study was a retrospective investigation by the Department of Medical Biochemistry of the Ankara Training and Research Hospital between January 1, 2021, and December 31, 2022. Our study evaluated the results of 6297 patients aged 18–95 years who underwent cholesterol panel TC, TG, HDL-C, and direct LDL-C in our laboratory. The estimated LDL-C was calculated according to Friedewald, Martin/Hopkins, and Sampson formulae. Results: All three formulae showed a stronger positive correlation with d-LDL-C (0.905, 0.897, and 0.886, respectively, for all data, p<0.001). In addition, when we compared the total median difference (1st–3rd quartile) of all formulae, it was -0.69 (-1.62 to 0.39) for Friedewald, 0.034 (-0.74 to 1.14) for Martin/Hopkins and -0.40 (-1.19 to 0.55) for Sampson. According to Passing Bablok regression analyses, the intercept was determined as -0.97 (95% CI=-1.01 to -0.93), 0.41 (95%=0.37 to 0.44) and -0.05 (-0.08 to -0. 03) and slopes were calculated as 1.083 (95% CI=1.07–1.09), 0.88 (0.88 to 0.89) and 0. 90 (95%=0.89 to 0.90) for Friedewald, Martin/Hopkins and Sampson, respectively. Conclusions: Our findings suggest that the Martin/Hopkins formula performed better than the Friedewald and Sampson formulas. We figured out utilizing the Martin/ Hopkins formula as a good alternative for estimated LDL-C in Turkish adults. [ABSTRACT FROM AUTHOR]
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- 2024
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31. A novel electrochemical aptasensor based on NrGO-H-Mn3O4 NPs integrated CRISPR/Cas12a system for ultrasensitive low-density lipoprotein determination.
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Li, Guiyin, Li, Shengnan, Li, Xinhao, He, Wei, Tan, Xiaohong, Liang, Jintao, and Zhou, Zhide
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CRISPRS , *SINGLE-stranded DNA , *ELECTRIC conductivity , *LOW density lipoproteins , *DETECTION limit - Abstract
Atherosclerosis cardiovascular disease (ASCVD) has become one of the leading death causes in humans. Low-density lipoprotein (LDL) is an important biomarker for assessing ASCVD risk level. Thus, monitoring LDL levels can be an important means for early diagnosis of ASCVD. Herein, a novel electrochemical aptasensor for determination LDL was designed based on nitrogen-doped reduced graphene oxide-hemin-manganese oxide nanoparticles (NrGO-H-Mn3O4 NPs) integrated with clustered regularly interspaced short palindromic repeats and associated proteins (CRISPR/Cas12a) system. NrGO-H-Mn3O4 NPs not only have a large surface area and remarkable enhanced electrical conductivity but also the interconversion of different valence states of iron in hemin can provide an electrical signal. Nonspecific single-stranded DNA (ssDNA) was bound to NrGO-H-Mn3O4 NPs to form a signaling probe and was immobilized on the electrode surface. The CRISPR/Cas12a system has excellent trans-cleavage activity, which can be used to cleave ssDNA, thus detaching the NrGO-H-Mn3O4 NPs from the sensing interface and attenuating the electrical signal. Significant signal change triggered by the target was ultimately obtained, thus achieving sensitive detection of the LDL in range from 0.005 to 1000.0 nM with the detection limit of 0.005 nM. The proposed sensor exhibited good stability, selectivity, and stability and achieved reliable detection of LDL in serum samples, demonstrating its promising application prospects for the diagnostic application of LDL. [ABSTRACT FROM AUTHOR]
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- 2024
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32. Lipid-lowering therapy with inclisiran in the real-world setting: Initial data from a national health care service.
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Naoum, Ibrahim, Saliba, Walid, Aker, Amir, and Zafrir, Barak
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NATIONAL health services ,SMALL interfering RNA ,PATIENT compliance ,HYPERCHOLESTEREMIA ,ANTILIPEMIC agents ,PATIENT safety ,CARDIOVASCULAR diseases ,TREATMENT effectiveness ,DESCRIPTIVE statistics ,LDL cholesterol ,PROTEASE inhibitors ,DRUG efficacy ,PROTEOLYTIC enzymes ,DRUGS ,PHARMACODYNAMICS ,EVALUATION - Abstract
• Real-world data of a national healthcare service on patients initiating inclisiran. • Significant reduction in LDL-C, relative to both peak and pre-inclisiran levels. • High interindividual variability and good short-term adherence. • Attainment rates of LDL-C treatment goals were sub-optimal. • Reduction in concurrent lipid-lowering therapies following initiation of inclisiran. Inclisiran, a small-interfering RNA enabling long-term inhibition of proprotein convertase subtilisin kexin type 9 (PCSK9) synthesis, demonstrates a good safety and efficacy profile in clinical trials. Real-world data on the potential to attain lipid-goals and reduce treatment gaps are lacking. To investigate the implementation of inclisiran in real-world clinical setting. Data from a nationwide healthcare organization on patients initiating inclisiran between 3/2022–11/2023. Patients' characteristics, lipid-lowering therapies, post-treatment reduction in low-density lipoprotein cholesterol (LDL-C), and attainment of treatment goals were evaluated. Inclisiran was initiated by 503 patients (57% women; mean age 66±11 years). Cardiovascular disease was present in 54%, and peak LDL-C levels >190 mg/dL documented in 64%. Prior exposure to PCSK9 monoclonal antibodies was evident in 28%. Lipid profile >2 months after filling first prescription, was available in 397 patients (347 with ≥2 injections). In patients treated by inclisiran only (n = 254), median LDL-C reduction from peak levels was 57% (interquartile range [IQR], 48%-67%), and from pre-injection levels 40% (19%-54%). In those with concomitant lipid-lowering therapies (n = 143), median LDL-C reduction from peak levels was 66% (IQR, 55%-73%), and from pre-injection levels 46% (23%-59%). LDL-C < 70 mg/dL was attained by 39% and LDL-C < 55 mg/dL by 21.9%. Of those treated with concomitant statin therapy, 38% attained LDL-C < 55 mg/dL. Overall, 6.5% discontinued inclisiran therapy after initial injection. In real-world practice, inclisiran showed good efficacy in reducing LDL-C with high interindividual variability. However, attainment rates of lipid goals were suboptimal due to limited use of combination lipid-lowering therapy and high rates of severe hypercholesterolemia in our patient population cohort. Lipid-lowering therapy with Inclisiran in the real-world setting: initial data from a health care service. Percent reduction of LDL-C is presented as median and interquartile range. [Display omitted] [ABSTRACT FROM AUTHOR]
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- 2024
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33. Studying Myostatin as a Diagnostic Indicator in Sera of Iraqi Women with Metabolic Syndrome.
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Assaf, Riyam Hussein and Farhan, Layla Othman
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METABOLIC syndrome ,MYOSTATIN ,IRAQIS ,MUSCLE growth ,INSULIN resistance ,METABOLIC disorders ,LOW density lipoproteins - Abstract
Copyright of Baghdad Science Journal is the property of Republic of Iraq Ministry of Higher Education & Scientific Research (MOHESR) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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34. Fluctuations in serum lipid levels during neoadjuvant treatment as novel predictive and prognostic biomarkers for locally advanced breast cancer: a retrospective analysis based on a prospective cohort.
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Chen, Xinru, Zhao, Yingying, Wang, Yaohui, Ye, Yumei, Xu, Shuguang, Zhou, Liheng, Lin, Yanping, Lu, Jingsong, and Yin, Wenjin
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CANCER patients ,METASTATIC breast cancer ,RANDOM forest algorithms ,LIPID metabolism ,BLOOD lipids - Abstract
Background: With increasing attention given to host-specific lipid metabolism status, it is of urgent need to identify lipid metabolism indices with predictive or prognostic value in locally advanced breast cancer patients treated with neoadjuvant chemotherapy (NAC), and to evaluate the performance improvement by incorporating them into the existing Neo-Bioscore staging system. Methods: Patients from a prospectively maintained database of locally advanced breast cancer patients who received radical surgery after NAC between January 2014 to December 2020 were enrolled in this study. The enrolled patients were randomly divided into a training set and a test set at a ratio of 6:4. The random forest algorithm was applied to rank the importance of prognostic factors, top-ranked lipid metabolism indices of which were then incorporated into Neo-Bioscore to construct an updated prognostic model. The performances of these two models were compared in both training set and test set from multiple perspectives. Study outcomes included disease-free survival (DFS), relapse-free survival (RFS), distance-recurrence-free survival (DRFS), locoregional-recurrence-free survival (LRFS) and overall survival (OS). Results: A total of 200 eligible patients were included in this study. After a median follow-up of 4.73 years, it was demonstrated that the relative increase in total cholesterol (TC; DFS: HR = 4.782, 95%CI 1.410 ~ 16.217, P = 0.012) and low-density lipoprotein (LDL; DFS: HR = 4.622, 95%CI 1.517 ~ 14.088, P = 0.007) during NAC led to poorer survival outcomes. Patients with either a higher body mass index (BMI) or elevated LDL during NAC had a worse prognosis (DFS: HR = 6.351, 95%CI 1.938 ~ 20.809, P = 0.002; OS, HR = 6.919, 95%CI 1.296 ~ 36.932, P = 0.024). Incorporating BMI and LDL fluctuations during NAC into Neo-Bioscore improved the prognostic stratification, especially in terms of LRFS (P = 0.046 vs. P = 0.65) and OS (P = 0.013 vs. P = 0.61). Multidimensional evaluation confirmed the improvement in model fit and clinical use for the updated model in both training set and test set. Conclusions: This is the first study to illustrate the relative elevation of LDL and TC levels during NAC as independent prognosticators for locally advanced breast cancer. This is also the first attempt to incorporate lipid metabolism indices into the original Neo-Bioscore staging system, which further improves the prognostic stratification of patients receiving NAC. [ABSTRACT FROM AUTHOR]
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- 2024
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35. Serum LDL Promotes Microglial Activation and Exacerbates Demyelinating Injury in Neuromyelitis Optica Spectrum Disorder.
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Chen, Man, Chu, Yun-Hui, Yu, Wen-Xiang, You, Yun-Fan, Tang, Yue, Pang, Xiao-Wei, Zhang, Hang, Shang, Ke, Deng, Gang, Zhou, Luo-Qi, Yang, Sheng, Wang, Wei, Xiao, Jun, Tian, Dai-Shi, and Qin, Chuan
- Abstract
Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune inflammatory demyelinating disease of the central nervous system (CNS) accompanied by blood-brain barrier (BBB) disruption. Dysfunction in microglial lipid metabolism is believed to be closely associated with the neuropathology of NMOSD. However, there is limited evidence on the functional relevance of circulating lipids in CNS demyelination, cellular metabolism, and microglial function. Here, we found that serum low-density lipoprotein (LDL) was positively correlated with markers of neurological damage in NMOSD patients. In addition, we demonstrated in a mouse model of NMOSD that LDL penetrates the CNS through the leaky BBB, directly activating microglia. This activation leads to excessive phagocytosis of myelin debris, inhibition of lipid metabolism, and increased glycolysis, ultimately exacerbating myelin damage. We also found that therapeutic interventions aimed at reducing circulating LDL effectively reversed the lipid metabolic dysfunction in microglia and mitigated the demyelinating injury in NMOSD. These findings shed light on the molecular and cellular mechanisms underlying the positive correlation between serum LDL and neurological damage, highlighting the potential therapeutic target for lowering circulating lipids to alleviate the acute demyelinating injury in NMOSD. [ABSTRACT FROM AUTHOR]
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- 2024
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36. EVALUATION OF BLOOD LIPIDS IN TWO MAJOR NIGERIAN INDIGENOUS CHICKENS, KUROILER AND THEIR CROSSBREDS.
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ADEDEJI, Tosin Ademola, POPOOLA, Abimbola Deborah, AMAO, Shola Rasheed, OJUA, Oluwatobi Elijah, and OKEDIRAN, Tope Emmanuel
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BLOOD cholesterol ,HIGH density lipoproteins ,LOW density lipoproteins ,CHICKENS ,HUMAN beings - Abstract
This study evaluated the blood lipids (total cholesterol, triglycerides, and lipoprotein). In the study, 18 chickens each of Naked Neck (NN), Normal Feather (NF), Kuroiler (KR) and their crossbreds were used. They were reared under the same environment and management. Chickens were slaughtered and blood samples were taken at 24 weeks of age, the serum was harvested by centrifugation, and then the total cholesterol (TCH), triglycerides (TG) and high-density lipoprotein (HDL) were assayed using an enzymatic kit, Low-density lipoprotein (LDL) were determined using the Friedwald equation. The results obtained indicated that genotype significantly differed (p<0.01) in TCH, TG and HDL levels. Sexwisely, males had significantly higher (p<0.01) levels of TCH (96.99 ± 8.78 mg/dL), TG (102.98 ± 11.15 mg/dL) and LDL (52.11 ± 2.12 mg/dL) in all the genotypes than its female counterpart. Furthermore, NN progenies recorded the lowest values in all parameters studied, TCH (61.44 ± 5.09 mg/dL), TG (61.23 ± 19.46 mg/dL), HDL (26.84 ± 4.04 mg/dL) and LDL (32.55 ± 14.10 mg/dL). The TCH and TG were low in both NN and NF chickens but the HDL and LDL were very low in NN birds while the level of cholesterol and fat was high in the pure exotic breed and low in the crossbred progenies. The reported lower serum cholesterol and triglyceride concentrations are reflected in their concentrations in blood and protect human beings from atherosclerosis. Therefore, estimation of blood lipid in these birds is recommended for future study. [ABSTRACT FROM AUTHOR]
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- 2024
37. APT imaging of hepatocellular carcinoma signals an effective therapeutic response in advance of tumor shrinkage
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Xiaojing Wang, Keisuke Ishimatsu, Junjie Li, Xiaodong Wen, Weijun Ou, Arnida Anwar, Jaideep Chaudhary, Masaya Takahashi, A Dean Sherry, and Ian R Corbin
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docosahexaenoic acid ,hepatocellular carcinoma ,low-density lipoprotein ,molecular imaging ,nanoparticle ,Diseases of the digestive system. Gastroenterology ,RC799-869 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Aim: The aim of this study was to assess the utility of weighted amide proton transfer (APTw) MRI in three different rodent models of hepatocellular carcinoma (HCC).Methods: APTw MRI was evaluated in models of diethylnitrosamine (DEN) induced HCC, N1S1 syngeneic orthotopic xenograft and human HepG2 ectopic xenograft.Results: All models of HCC showed a higher APTw signal over the surrounding normal tissues. In the DEN model, the APTw signal could differentiate HCC lesions from benign nodules. Intra-arterial administration of low-density lipoprotein docosahexaenoic acid (LDL-DHA) nanoparticles to N1S1 xenografts rapidly lowered the tumor APTw signal within 72 h. Direct injections of LDL-DHA nanoparticles into HepG2 xenografts also showed similar therapeutic responses.Conclusion: We have demonstrated the utility of APTw imaging in the diagnostic/therapeutic management of HCC.
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- 2024
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38. Insulin resistance has closer correlation with the occurrence of metabolic dysfunction associated steatotic liver disease diagnosed by liver biopsy
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Weihua Cao, Tingting Jiang, Wen Deng, Shiyu Wang, Xinxin Li, Ziyu Zhang, Lu Zhang, Yao Lu, Min Chang, Ruyu Liu, Shuling Wu, Ge Shen, Yuanjiao Gao, Hongxiao Hao, Xiaoxue Chen, Leiping Hu, Mengjiao Xu, Wei Yi, Yao Xie, and Minghui Li
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metabolic dysfunction associated steatotic liver disease ,hyperuricemia ,metabolic syndrome ,liver biopsy ,low-density lipoprotein ,hyperinsulinemia ,Medicine (General) ,R5-920 - Abstract
ObjectiveTo explore any correlation between serum urate (SU) level or insulin resistance (IR) and metabolic dysfunction associated steatotic liver disease (MASLD) in patients with metabolic syndrome (MS).MethodsData from all MASLD patients, diagnosed by liver biopsy, were enrolled and divided into MASLD alone group and MASLD with MS group. They were subdivided into hyperuricemia group and normal SU group to find correlation between SU/IR and MASLD in patients with MS and independent risk factors for MASLD.ResultsData from 539 MASLD patients were analyzed. Body mass index (BMI) (p = 0.000), waist circumference (WC) (p = 0.004), and low-density lipoprotein (LDL) (p = 0.000) were dramatically higher in MASLD with MS group than those with MASLD alone; MASLD with MS patients had significantly more family history of diabetes (p = 0.000) and hypertension (p = 0.000) than patients with MASLD alone. Height (p = 0.000), weight (p = 0.000), BMI (p = 0.000) and WC (p = 0.001), and LDL (p = 0.007) were dramatically higher in hyperuricemia patients than those with normal SU. SU was inversely associated with age (p = 0.000) and high-density lipoprotein (HDL) (p = 0.003), and positively correlated with weight (p = 0.000), BMI (p = 0.000) and WC (p = 0.000), TG (p = 0.000), and LDL (p = 0.000). Logistic Regression analysis showed that age (p = 0.031), TG (p = 0.002), LDL (p = 0.010), HbA1c (p = 0.026), and family history of hypertension (p = 0.000) may be independent risk factors for MASLD in patient with MS.ConclusionInsulin resistance (IR) in MASLD patients with MS, but not higher SU levels, has closer correlation with the occurrence of MASLD in patients with family history of hypertension and diabetes having higher BMI, LDL, HbA1c.
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- 2024
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39. Serum zinc levels and body composition variability as trajectory for hyperlipidemic and dyslipidemic effect among welders exposed to welding fumes and smoking: A biomarker for cardiovascular health
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Bartholomew Chukwuebuka Nwogueze, Mary Isioma Ofili, Kenneth Kelechi Anachuna, and Alphonsus Okafor Mbah
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Welder ,Total cholesterol ,Triglyceride ,High-density lipoprotein ,Low-density lipoprotein ,Body mass index ,Toxicology. Poisons ,RA1190-1270 - Abstract
Welding is a common method for joining metals by heating them to the welding temperature. Exposure to welding fumes has a serious effect on the health of welders. This study examined serum zinc variability and body composition as route for hyperlipidemia and dyslipidemia in welders exposed to welding fumes and smoking, exploring the possibilities for the risk of possible cardiovascular disease. The experimental case control design was adopted in the study. Forty apparently healthy adult males were randomly selected comprising of twenty control group (non-smokers and smokers without welding experience) and twenty experimental group (non-smokers and smokers with welding experience) welders. Data obtained were represented as Mean ± SEM while comparison of means across group was done by one-way ANOVA followed by Tukey's multiple comparison for post hoc test at p-value < 0.05 level of significance using Graph Pad prism version 8. The data obtained showed that the body mass index (BMI) of smokers (non-welders and welders) were slightly reduced while that of non-smoking welders was increased compared to the control. The serum zinc level increased among the smoking welders, while the smoking non-welders and non-smoking welders decreased when compared to the control group (p < 0.05). Exposure to welding fumes has been shown to increase total cholesterol levels compared to the control. Weld fumes significantly (p < 0.05) increased high-density lipoproteins (HDL) levels among smoking non-welders compared to the control group, while, HDL was reduced in non-smoking welders and smoking welders, respectively (p < 0.05). Triglyceride levels significantly (p < 0.05) increased in all experimental groups compared to control levels (p < 0.05). Exposure to welding fumes and smoking caused significant changes in serum zinc, HDL and triglycerides levels with implications for the formation of plaques around the arteries interfering with the effective flow of blood through the vascular system, with implications of hyperlipidemia and dyslipidemia. This study recommends that further studies should be done using biomarkers from urine or toe nails.
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- 2024
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40. Effectiveness of complementary nursing 'wet cupping' on low-density lipoprotein (LDL) in palliative patients with hypertension
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Khoirul Latifin, Sigit Purwanto, and Antarini Idriansari
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hypertension ,low-density lipoprotein ,wet cupping ,Gynecology and obstetrics ,RG1-991 - Abstract
Background: Nowadays, there are many people with hypertension who are not aware of it. Hypertension can be caused by various factors, based on secondary hypertension or primary hypertension. High cholesterol levels are one of the causes of increased blood pressure. Low-Density Lipoprotein (LDL) is a type of cholesterol that is not good for the body if it exceeds normal limits. Objectives: This study aimed to determine the effectiveness of complementary Wet Cupping nursing on changes in Low-Density Lipoprotein cholesterol levels in people with hypertension. Methods: The research method used was experimental research with a pre-experimental design, namely one group pretest and posttest design. Respondents were selected using purposive sampling techniques, based on the specified inclusion criteria, totaling 16 respondents. Respondents received intervention in the form of complementary wet cupping nursing three times and this was done once a week. The instruments of this research are standard operational procedures and observation sheets for Low-Density Lipoprotein (LDL) measurement results.Results: The results of this study state that there is a less significant effect on Low-Density Lipoprotein in people with hypertension after being given complementary wet cupping treatment with a significant value of 0.717 or p-value> 0.05. Although the results of statistical tests did not show significant results, there were 56.25% of respondents who experienced a decrease in Low-Density Lipoprotein. Conclusions:. Wet cupping is a treatment method that has various benefits for the body's health and does not cause bad side effects after cupping. So wet cupping can be a recommended alternative therapy option for hypertension sufferers to control Low-Density Lipoprotein levels by doing cupping regularly.
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- 2024
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41. Preclinical models of atherosclerosis: An overview
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Priyanka Arya, Vikram Sharma, Surabhi Thapliyal, Rahul Sagar, and Priyanka Singh
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atherosclerosis ,cardiovascular disease ,diets ,inflammation ,low-density lipoprotein ,Medicine - Abstract
Atherosclerosis is a primary cause of illness and death globally and its mechanism is still unclear. Different animal models have been created to evaluate the progression of atherosclerosis, allowing researchers to carefully control the circumstances of the experiment as well as the nutrition and environmental risk factors. To investigate the negative effects of various interventions, pathophysiological alterations might be generated utilizing genetic or pharmacological methods. These models’ molecular and pathophysiological mechanisms have been clarified through experiments, and they have served as platforms for the creation of new drugs. Different models can be employed to address various research problems, each with its own benefits and drawbacks. In the current review study, various species of atherosclerosis models are discussed, along with the viability of using them in experiments.
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- 2024
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42. Impact of Proprotein Convertase Subtilisin/Kexin Type 9 Inhibitors on Lipoprotein(a)
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Frederick Berro Rivera, MD, Sung Whoy Cha, MD, Cruz Linnaeus Louisse, MD, Genquen Philip Carado, MD, John Vincent Magalong, MD, Vincent Anthony Tang, MD, Mary Grace Enriquez, MD, Martha Gulati, MD, MS, Byambaa Enkhmaa, MD, PhD, Neha Pagidipati, MD, MPH, and Nishant P. Shah, MD
- Subjects
alirocumab ,apolipoprotein B ,atherosclerotic cardiovascular disease ,cholesterol ,evolocumab ,low-density lipoprotein ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Background: Lipoprotein(a) [Lp(a)] has been independently associated with increased cardiovascular risk. Objectives: The authors examined the effect of monoclonal antibody proprotein convertase subtilisin/kexin type 9 inhibitors (PCSK9is) on plasma Lp(a) levels across multiple trials. Methods: Studies were retrieved comparing the effect of PCSK9i vs placebo on Lp(a) levels. The primary outcome was percent change in Lp(a) levels. Factors associated with the treatment effect were determined by meta-regression analysis. Subgroup analyses were done to explore potential treatment effect differences. Results: PCSK9i reduced Lp(a) levels on average of −27% (95% CI: −29.8% to −24.1%, P 12 weeks: −22.31%] [95% CI: −25.13% to −19.49%, P
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- 2025
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43. Structure-based mechanism and inhibition of cholesteryl ester transfer protein
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Xue, Han, Zhang, Meng, Liu, Jianfang, Wang, Jianjun, and Ren, Gang
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Biomedical and Clinical Sciences ,Cardiovascular Medicine and Haematology ,Cardiovascular ,Aging ,Atherosclerosis ,Heart Disease ,Good Health and Well Being ,Humans ,Cardiovascular Diseases ,Cholesterol ,Cholesterol Ester Transfer Proteins ,Cholesterol ,HDL ,Cholesterol ,LDL ,Dyslipidemias ,Lipoproteins ,Cholesteryl ester transfer protein ,CETP structure ,CETP dynamics ,Lipoprotein ,Low-density lipoprotein ,High-density lipoprotein ,CETP inhibitor ,Electron microscopy ,Cardiorespiratory Medicine and Haematology ,Cardiovascular System & Hematology ,Cardiovascular medicine and haematology - Abstract
Purpose of reviewCholesteryl ester transfer proteins (CETP) regulate plasma cholesterol levels by transferring cholesteryl esters (CEs) among lipoproteins. Lipoprotein cholesterol levels correlate with the risk factors for atherosclerotic cardiovascular disease (ASCVD). This article reviews recent research on CETP structure, lipid transfer mechanism, and its inhibition.Recent findingsGenetic deficiency in CETP is associated with a low plasma level of low-density lipoprotein cholesterol (LDL-C) and a profoundly elevated plasma level of high-density lipoprotein cholesterol (HDL-C), which correlates with a lower risk of atherosclerotic cardiovascular disease (ASCVD). However, a very high concentration of HDL-C also correlates with increased ASCVD mortality. Considering that the elevated CETP activity is a major determinant of the atherogenic dyslipidemia, i.e., pro-atherogenic reductions in HDL and LDL particle size, inhibition of CETP emerged as a promising pharmacological target during the past two decades. CETP inhibitors, including torcetrapib, dalcetrapib, evacetrapib, anacetrapib and obicetrapib, were designed and evaluated in phase III clinical trials for the treatment of ASCVD or dyslipidemia. Although these inhibitors increase in plasma HDL-C levels and/or reduce LDL-C levels, the poor efficacy against ASCVD ended interest in CETP as an anti-ASCVD target. Nevertheless, interest in CETP and the molecular mechanism by which it inhibits CE transfer among lipoproteins persisted. Insights into the structural-based CETP-lipoprotein interactions can unravel CETP inhibition machinery, which can hopefully guide the design of more effective CETP inhibitors that combat ASCVD. Individual-molecule 3D structures of CETP bound to lipoproteins provide a model for understanding the mechanism by which CETP mediates lipid transfer and which in turn, guide the rational design of new anti-ASCVD therapeutics.
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- 2023
44. Effect of Drying Method and Coating With Gum Arabic on Physicochemical Properties, Betalain Content, LDL Oxidation, and Storage Stability of Dried Red Beetroot Slices.
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Kamel, Sahar M., Alqurashi, Randah M., Alshebly, Anoud M., Saleh, Farag A., Alnemr, Tareq M., Ali, Hoda F., Ali, Salim A., Asiri, Saeed A., Ibrahim, Marwa E., Alqahtani, Nashi K., and Fernandes, Fabiano A.N.
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GUM arabic , *BEETS , *NUTRITIONAL value , *LOW density lipoproteins , *SURFACE coatings - Abstract
Red beetroot is a unique vegetable crop with high nutritional value and various health benefits, but due to the short shelf life, it requires a suitable preservation method. The purpose of the current investigation is to study the impacts of pretreatment coating with gum Arabic and drying method (oven, microwave, and freeze‐drying) on the quality parameters and storage stability of beetroot slices. Freeze‐dried beetroot samples showed the lowest moisture content (MC) (7.59%) and the highest rehydration ratio (RR) (5.47), betalain content (48.57 mg/100 g), antioxidant activity (70.92%), and overall acceptability scores (4.48). Generally, the pretreatment coating with gum Arabic reduced the degradation of betalain and antioxidants and maintained higher sensory scores of dried beetroot samples compared to uncoated ones. The beetroot extract prepared from freeze‐dried and coated with gum Arabic samples decreased the oxidation of low‐density lipoprotein (LDL) compared to control. Freeze‐dried samples coated with gum Arabic revealed higher storage stability (after 4 weeks of storage at room temperature) in terms of betalain content and antioxidant activity with values of 43.84 mg/100 g and 67.02%, respectively, compared to uncoated ones which recorded 35.15 mg/100 g and 64.22% for betalain content and antioxidant activity, respectively. Generally, freeze‐drying and coating with gum Arabic is considered a promising treatment to maintain the quality and storage stability of dried beetroot slices. Further investigations including nutritional, technological, and economic aspects are required for the optimum application in the future. [ABSTRACT FROM AUTHOR]
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- 2024
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45. Impact of Lipoprotein(a) Level on Low-Density Lipoprotein Cholesterol– or Apolipoprotein B–Related Risk of Coronary Heart Disease.
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Arnold, Natalie, Blaum, Christopher, Goßling, Alina, Brunner, Fabian J., Bay, Benjamin, Zeller, Tanja, Ferrario, Marco M., Brambilla, Paolo, Cesana, Giancarlo, Leoni, Valerio, Palmieri, Luigi, Donfrancesco, Chiara, Ojeda, Francisco, Linneberg, Allan, Söderberg, Stefan, Iacoviello, Licia, Gianfagna, Francesco, Costanzo, Simona, Sans, Susana, and Veronesi, Giovanni
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- *
CORONARY disease , *LDL cholesterol , *APOLIPOPROTEIN B , *LOW density lipoproteins - Abstract
Conventional low-density lipoprotein cholesterol (LDL-C) quantification includes cholesterol attributable to lipoprotein(a) (Lp(a)-C) due to their overlapping densities. The purposes of this study were to compare the association between LDL-C and LDL-C corrected for Lp(a)-C (LDL Lp(a)corr) with incident coronary heart disease (CHD) in the general population and to investigate whether concomitant Lp(a) values influence the association of LDL-C or apolipoprotein B (apoB) with coronary events. Among 68,748 CHD-free subjects at baseline LDL Lp(a)corr was calculated as "LDL-C—Lp(a)-C," where Lp(a)-C was 30% or 17.3% of total Lp(a) mass. Fine and Gray competing risk-adjusted models were applied for the association between the outcome incident CHD and: 1) LDL-C and LDL Lp(a)corr in the total sample; and 2) LDL-C and apoB after stratification by Lp(a) mass (≥/<90th percentile). Similar risk estimates for incident CHD were found for LDL-C and LDL-C Lp(a) corr30 or LDL-C Lp(a) corr17.3 (subdistribution HR with 95% CI) were 2.73 (95% CI: 2.34-3.20) vs 2.51 (95% CI: 2.15-2.93) vs 2.64 (95% CI: 2.26-3.10), respectively (top vs bottom fifth; fully adjusted models). Categorization by Lp(a) mass resulted in higher subdistribution HRs for uncorrected LDL-C and incident CHD at Lp(a) ≥90th percentile (4.38 [95% CI: 2.08-9.22]) vs 2.60 [95% CI: 2.21-3.07]) at Lp(a) <90th percentile (top vs bottom fifth; P interaction 0.39). In contrast, apoB risk estimates were lower in subjects with higher Lp(a) mass (2.43 [95% CI: 1.34-4.40]) than in Lp(a) <90th percentile (3.34 [95% CI: 2.78-4.01]) (P interaction 0.49). Correction of LDL-C for its Lp(a)-C content provided no meaningful information on CHD-risk estimation at the population level. Simple categorization of Lp(a) mass (≥/<90th percentile) influenced the association between LDL-C or apoB with future CHD mostly at higher Lp(a) levels. [ABSTRACT FROM AUTHOR]
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- 2024
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46. In Search of an Accurate Measurement of LDL-C: Correction for Lp(a)-Cholesterol to Predict Clinical Outcomes.
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Tsimikas, Sotirios, Yeang, Calvin, and Kronenberg, Florian
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LDL cholesterol , *TREATMENT effectiveness , *MEASUREMENT , *FORECASTING - Abstract
[Display omitted] [ABSTRACT FROM AUTHOR]
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- 2024
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47. Martin's formula is best to calculate low-density lipoprotein cholesterol.
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Farheen, Fatima, Ambiger, Sudha, Jaalam, Kamarudin, and Javali, Shivalingappa
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LDL cholesterol , *PEARSON correlation (Statistics) , *LOW density lipoproteins , *AGE groups - Abstract
Objectives: Due to the cost-effectiveness, most of the laboratories in India estimate low-density lipoprotein cholesterol (LDL-C) levels with the Friedewald's formula. There were many shortcomings of the Friedewald's formula. Recently, Martins have derived a new formula for calculating LDL-C. The present study was undertaken to calculate LDL-C using various formulae (Friedewald's formula, Anandaraja's formula, and Martin's formula) and to compare directly measured LDL-C with calculated LDL-C at various ranges of triglyceride (TG) concentration. Materials and Methods: The present study compared LDL-C measured by Martin's formula, Friedewald's formula, and Anandaraja's formula with directly measured LDL In 280 Outpatient fasting samples between the age group of 18 and 50 years. Depending on the TG values, study samples are divided into four groups. Group 1: <200 mg/dL, Group 2: 200–300 mg/dL, Group 3: 300–400 mg/dL, Group 4: >400 mg/dL. Statistical Analysis: This was performed by the Statistical package for social sciences version 16. Paired t test and pearson correlation were performed to find the significant difference and correlation between direct LDL-C and calculated LDL-C by different formula. Results: Martin's formula shows highest correlation with r-value of (0.9979) compared to Friedewald's (0.9857) and Anandaraja's (0.9683) r-values. The mean difference was least for Martin's formula (0.31 ± 3.53) compared to other formulae. Among all the groups, the percentage of error was least for Martin's formula (0.23%). Martin's LDL-C shows highest concordance (90.90%) compared to Friedewald's (79.60%) and Anandaraja's formulae (82.90%). Conclusions: Among all the groups, Martin's formula shows highest correlation, least percentage of error, highest concordance, and least mean differences. At all TG levels, Martin's formula is the best formula compared to the Friedewald's formula and Anandaraja's formula. [ABSTRACT FROM AUTHOR]
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- 2024
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48. Ldl-stimulated microglial activation exacerbates ischemic white matter damage.
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Zhou, Luo-Qi, Chu, Yun-Hui, Dong, Ming-Hao, Yang, Sheng, Chen, Man, Tang, Yue, Pang, Xiao-Wei, You, Yun-Fan, Wu, Long-Jun, Wang, Wei, Qin, Chuan, and Tian, Dai-Shi
- Subjects
- *
WHITE matter (Nerve tissue) , *MICROGLIA , *BLOOD-brain barrier , *PHAGOCYTOSIS , *MYELIN , *DYSLIPIDEMIA - Abstract
• BBB damage is a sustained trigger for demyelination during white matter ischemia. • Vessel-adjacent microglia co-activated by myelin and plasma LDL in white matter ischemia. • LDL-stimulated vessel-adjacent microglia showed compromised microglial regenerative properties. • Lowering circulating LDL may show therapeutic potentials in white matter ischemia. The role of microglia in triggering the blood–brain barrier (BBB) impairment and white matter damage after chronic cerebral hypoperfusion is unclear. Here we demonstrated that the vessel-adjacent microglia were specifically activated by the leakage of plasma low-density lipoprotein (LDL), which led to BBB breakdown and ischemic demyelination. Interestingly, we found that LDL stimulation enhanced microglial phagocytosis, causing excessive engulfment of myelin debris and resulting in an overwhelming lipid burden in microglia. Surprisingly, these lipid-laden microglia exhibited a suppressed profile of inflammatory response and compromised pro-regenerative properties. Microglia-specific knockdown of LDLR or systematic medication lowering circulating LDL-C showed protective effects against ischemic demyelination. Overall, our findings demonstrated that LDL-stimulated vessel-adjacent microglia possess a disease-specific molecular signature, characterized by suppressed regenerative properties, which is associated with the propagation of demyelination during ischemic white matter damage. [ABSTRACT FROM AUTHOR]
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- 2024
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49. Peroxidase-like Activity of Aptamer-Gold Nanoparticles for Selective and Sensitive Fluorescence Detection of Low-Density Lipoproteins.
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Prakobkij, Akarapong, Saenmuangchin, Rattaporn, Chunta, Suticha, Amatatongchai, Maliwan, Citterio, Daniel, and Jarujamrus, Purim
- Abstract
Low-density lipoprotein cholesterol (LDL-C), commonly called "bad cholesterol", is crucial to cardiovascular health. Increased LDL-C levels pose a substantial risk to human health. As a result, there is a demand for reliable, affordable, and highly sensitive analytical methods for LDL-C detection. Herein, a facile fluorometric aptasensor for LDL-C detection based on the aptamer-enhanced peroxidase-mimicking activity of gold nanoparticles (AuNPs) has been developed. AuNPs were functionalized with LDL-C-specific thiolated aptamer to enhance their intrinsic peroxidase-like activity, which could effectively catalyze the oxidation of o-phenylenediamine dihydrochloride (OPD) by H
2 O2 into the yellow-fluorescent product 2,3-diamino phenazine (DAP). The characterization studies confirmed that the presence of the aptamer enhances the affinity of AuNPs toward the OPD substrate, thereby leading to a marked increase in the peroxidase-mimicking activity. Moreover, after being functionalized with an aptamer, increased dispersibility and substrate affinity of AuNPs were achieved. Using LDL-C as a target analyte, under optimum conditions, a linear relationship between smartphone-recorded signal intensity and the logarithm of the analyte concentration was observed in the range of 0.05–1 mg dL–1 and the limit of detection was 0.0230 mg dL–1 . The results agree with those obtained by a clinical laboratory method. This proposed method is readily deployable and a promising prototype for diverse diagnostic applications, particularly in biomarker detection within serum or plasma samples. It holds the potential to yield substantial advantages in point-of-care testing. [ABSTRACT FROM AUTHOR]- Published
- 2024
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50. Primary hypocholesterolemia is associated with an increased risk of hepatic complications in the general population.
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Wargny, Matthieu, Goronflot, Thomas, Rimbert, Antoine, Boursier, Jérôme, Kab, Sofiane, Henny, Joseph, Lainé, Antoine, Leux, Christophe, Smati, Sarra, Hadjadj, Samy, Le May, Cédric, Goldberg, Marcel, Zins, Marie, and Cariou, Bertrand
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- *
LIVER histology , *DISEASE risk factors , *FATTY liver , *DISEASE complications , *LIVER cancer , *CARDIOVASCULAR diseases , *VIRAL hepatitis , *HEPATORENAL syndrome - Abstract
Beyond cardiovascular disease protection, the health consequences of very low concentrations of low-density lipoprotein-cholesterol (LDL-C) remain a matter of debate. In primary hypobetalipoproteinemia (HBL), liver steatosis and cirrhosis have occasionally been reported. Here, we aimed to investigate the association between HBL and the risk of hepatic complications (cirrhosis complications and/or primary liver cancer) in the general population. A cohort study was conducted in the French population-based cohort CONSTANCES. Participants with primary HBL (LDL-C <5th percentile for age and sex, [HBL]) were compared with those with normal LDL-C concentrations (40th-60th percentile, [Control]). Participants on lipid-lowering therapies were excluded. For hepatic complications, follow-up events were compared by calculating the incidence density ratio (IDR). The same analyses were replicated in the UK Biobank (UKBB) cohort. In the CONSTANCES and UKBB cohorts, 34,653 and 94,666 patients were analyzed, with median ages of 45 and 56 years, mean LDL-C concentrations (HBL vs. control) of 71 vs. 128 mg/dl and 86 vs. 142 mg/dl, and mean follow-up durations of 5.0 and 11.5 years, respectively. The HBL group presented a higher incidence of hepatic complications than the control group: 0.32/ vs. 0.07/1,000 person-years (IDR = 4.50, 95% CI 1.91-10.6) in CONSTANCES, and 0.69/ vs. 0.21/1,000 person-years (IDR = 3.27, 95% CI 2.63-4.06) in the UKBB. This risk proved to be independent of classic risk factors for liver disease (obesity, alcohol consumption, diabetes, viral hepatitis), including in a 5-year landmark analysis excluding early events. Sensitivity analyses based on apoliprotein-B levels (instead of LDL-C levels) or genetically defined HBL showed similar results. HBL is associated with a markedly increased risk of hepatic complications. HBL must be considered as a substantial independent risk factor for liver diseases which justifies specific prevention and screening. Hypobetalipoproteinemia (HBL) is a lipid disorder characterized by permanent, inherited low levels (below the 5th percentile) of low-density lipoprotein-cholesterol. While HBL is associated with a lower risk of cardiovascular events, some studies suggest that it may be associated with a potential risk of hepatic steatosis and hepatic complications. Here, we studied the association between HBL and hepatic complications (defined as cirrhosis complications and/or primary liver cancer) in two populations of several hundred thousand people, both in France (CONSTANCES cohort) and the United Kingdom (UKBB). The results show that HBL is associated with a significant and independent excess risk of hepatic complications, including primary liver cancer. Thus, in people with HBL, the value of regular liver monitoring must be studied. [Display omitted] • Hypobetalipoproteinemia is defined by permanent, inherited low LDL-cholesterol levels. • In two large population cohorts, hypobetalipoproteinemia increased the risk of cirrhosis complications and/or liver cancer. • This risk was observed independently of classical risk factors for liver disease (obesity, alcohol, diabetes, viral hepatitis). • Hypobetalipoproteinemia is a risk factor for liver disease complications that requires appropriate monitoring. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
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