278 results on '"Hsieh, P.F."'
Search Results
2. Determination of carbamazepine: a comparison of the differential pulse voltammetry (DPV) method and the immunoassay method in a clinical trial
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Pan, M.L., Lin, W.Y., Wang, H.Y., Tsai, S.C., Hsieh, P.F., Su, Y.L.O., and Huang, P.W.
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Immunoassay -- Research ,Clinical trials -- Research ,Carbamazepine -- Research -- Chemical properties ,Chemistry - Abstract
We conducted a clinical trial to analyze human serum containing carbamazepine by using the differential pulse voltammetry (DPV) method with a glassy carbon electrode, and compared it with the fluorescence polarization immunoassay (FPIA). Thirty patients, who visited our hospital to have their serum carbamazepine level checked, were enrolled. Ten mL of venous blood was collected from each patient and analyzed by DPV and FPIA methods. The correlation between the carbamazepine concentrations determined by DPV and FPIA was good, with an RSQ of 0.998. The similarity of the results indicates that these two methods can be used interchangeably. The DPV method using a glassy carbon electrode may be a potential alternative method to determine the carbamazepine level in human serum. Keywords: electrochemical method, differential pulse voltammetry, glassy carbon electrode, drug monitoring, immunoassay, carbamazepine, human serum DOI: 10.1134/S1061934814010110, Carbamazepine is a drug used for treating seizures. The monitoring of its serum concentration is very important in patients who take carbamazepine because side effects, such as dizziness, sleepiness, coma, [...]
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- 2014
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3. A randomised clinical trial of oral steroids in the treatment of carpal tunnel syndrome: a long term follow up. (Paper)
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Chang, M-H., Ger, L-P., Hsieh, P.F., and Huang, S-Y.
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Carpal tunnel syndrome -- Drug therapy ,Prednisolone -- Dosage and administration ,Health ,Psychology and mental health ,Drug therapy ,Dosage and administration - Abstract
Objectives: To determine the efficacy of a two week and a four week course of oral steroids in the conservative treatment of carpal tunnel syndrome. Methods: 109 patients with carpal [...]
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- 2002
4. NOTE ON ANALYTIC SOLUTIONS OF NONLINEAR ORDINARY DIFFERENTIAL EQUATIONS AT AN IRREGULAR TYPE SINGULARITY**This work is partially supported by NSF Grant GP-14595.
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Hsieh, P.F., primary
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- 1972
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5. Empirical mode decomposition for dimensionality reduction of hyperspectral data.
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Wu, K.L. and Hsieh, P.F.
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- 2005
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6. Globally Analytic Simplification and the Levinson Theorem
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Gingold, H., primary, Hsieh, P.F., additional, and Sibuya, Y., additional
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- 1994
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7. Statins in Mitigating Anticancer Treatment-Related Cardiovascular Disease.
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Jiang, Rong, Lou, Lian, Shi, Wen, Chen, Yuxiao, Fu, Zhaoming, Liu, Shuo, Sok, Thida, Li, Zhihang, Zhang, Xuan, and Yang, Jian
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IMMUNE checkpoint inhibitors ,CHIMERIC antigen receptors ,HEART failure ,THERAPEUTICS ,HEART injuries - Abstract
Certain anticancer therapies inevitably increase the risk of cardiovascular events, now the second leading cause of death among cancer patients. This underscores the critical need for developing effective drugs or regimens for cardiovascular protection. Statins possess properties such as antioxidative stress, anti-inflammatory effects, antifibrotic activity, endothelial protection, and immune modulation. These pathological processes are central to the cardiotoxicity associated with anticancer treatment. There is prospective clinical evidence confirming the protective role of statins in chemotherapy-induced cardiotoxicity. Numerous preclinical studies have demonstrated that statins can ameliorate heart and endothelial damage caused by radiotherapy, although clinical studies are scarce. In the animal models of trastuzumab-induced cardiomyopathy, statins provide protection through anti-inflammatory, antioxidant, and antifibrotic mechanisms. In animal and cell models, statins can mitigate inflammation, endothelial damage, and cardiac injury induced by immune checkpoint inhibitors. Chimeric antigen receptor (CAR)-T cell therapy-induced cardiotoxicity and immune effector cell-associated neurotoxicity syndrome are associated with uncontrolled inflammation and immune activation. Due to their anti-inflammatory and immunomodulatory effects, statins have been used to manage CAR-T cell therapy-induced immune effector cell-associated neurotoxicity syndrome in a clinical trial. However, direct evidence proving that statins can mitigate CAR-T cell therapy-induced cardiotoxicity is still lacking. This review summarizes the possible mechanisms of anticancer therapy-induced cardiotoxicity and the potential mechanisms by which statins may reduce related cardiac damage. We also discuss the current status of research on the protective effect of statins in anticancer treatment-related cardiovascular disease and provide directions for future research. Additionally, we propose further studies on using statins for the prevention of cardiovascular disease in anticancer treatment. [ABSTRACT FROM AUTHOR]
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- 2024
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8. A new anti-CRISPR gene promotes the spread of drug-resistance plasmids in Klebsiella pneumoniae.
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Jiang, Chunyu, Yu, Chengzhi, Sun, Shuyi, Lin, Jiajia, Cai, Mufeng, Wei, Zhenquan, Feng, Lingling, Li, Jianhui, Zhang, Yan, Dong, Ke, Guo, Xiaokui, Qin, Jinhong, and Zhang, Yu
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- 2024
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9. Efficacy, Satisfaction, and Compliance: Insights from 15 Years of Botulinum Toxin Use for Female Urgency Urinary Incontinence.
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Manso, Margarida, Soares, João Diogo, Henriques, Margarida, Botelho, Francisco, Silva, Carlos, and Cruz, Francisco
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URINARY urge incontinence ,OVERACTIVE bladder ,PATIENT preferences ,PATIENT satisfaction ,THERAPEUTICS ,BOTULINUM toxin ,BOTULINUM A toxins - Abstract
Urgency urinary incontinence (UUI) refractory to medical treatment poses significant challenges despite advancements. This study evaluates the efficacy of intravesical botulinum toxin for UUI and identifies factors influencing treatment outcomes. Among 368 women receiving botulinum toxin injections, 74.5% achieved a complete discontinuation of pad usage. Predictors of efficacy included lower pre-treatment pad usage and the absence of prior sling placement. Patients often required repeat injections (60.3%), with younger age and satisfaction correlating with treatment repetition. The interval between injections averaged 18 months, influenced by logistical challenges and patient preferences. Despite concerns about diminishing efficacy, subjective perceptions did not align with objective findings. Limitations include retrospective analysis and heterogeneous clinical records. In conclusion, intravesical botulinum toxin is effective for UUI, with pre-treatment pad usage and sling placement history influencing outcomes and patient characteristics influencing treatment repetition. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Evaluating the Therapeutic Effect of Hispidin on Prostate Cancer Cells.
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Chan, Kai-Cheng, Basavaraj, Praveenkumar, Tsai, Jui-Chen, Viehoever, Jonathan, Hsieh, Bing-Yan, Li, Xin-Yu, Huang, Guan-Jhong, and Huang, Wen-Chin
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CANCER cells ,TREATMENT effectiveness ,PROSTATE cancer ,WESTERN immunoblotting ,APOPTOSIS ,ANDROGEN receptors - Abstract
Androgen deprivation therapy (ADT) is the primary treatment for advanced prostate cancer (PCa). However, prolonged ADT inevitably results in therapy resistance with the emergence of the castration-resistant PCa phenotype (CRPC). Hence, there is an urgent need to explore new treatment options capable of delaying PCa progression. Hispidin (HPD) is a natural polyketide primarily derived from plants and fungi. HPD has been shown to have a diverse pharmacological profile, exhibiting anti-inflammatory, antiviral, cardiovascular and neuro-protective activities. However, there is currently no research regarding its properties in the context of PCa treatment. This research article seeks to evaluate the anti-cancer effect of HPD and determine the underlying molecular basis in both androgen-sensitive PCa and CRPC cells. Cell growth, migration, and invasion assays were performed via the MTS method, a wound healing assay and the transwell method. To investigate if HPD affected the expression of proteins, Western blot analysis was conducted. Furthermore, apoptosis was assessed by Annexin V-FITC/PI staining and Western blot analyses. HPD exhibited a favorable pharmaceutical profile to inhibit cell growth; disrupt the cell cycle; attenuate wound healing, migration and invasion; and induce apoptosis in PCa cells in vitro. The mechanistic results demonstrated that HPD reduced AR, MMP-2 and MMP-9 expression and activated the caspase-related pathway, leading to programmed cell death in PCa cells. We showed the anti-cancer effect of HPD on PCa cells and confirmed its feasibility as a novel therapeutic agent. This study provides significant insights into the delineation of the molecular mechanism of HPD in PCa cells and the development of an effective and safe therapy using HPD to eliminate PCa progression. [ABSTRACT FROM AUTHOR]
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- 2024
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11. The future of events in the tourism industry: the case of the "Best of the Best Things to Do 2023" on TripAdvisor.
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Ertaş, Çağdaş and Karakan, Halil Ibrahim
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EVENT tourism ,TOURISM ,USER-generated content ,TOUR brokers & operators ,COMMUNITY involvement - Abstract
Purpose: This study aims to use TripAdvisor data to identify which themes and events will attract more interest in the future of tourism activities and to provide guidance to the industry accordingly. Design/methodology/approach: This study used qualitative case study approach. To identify key themes in the top-rated activities, thematic analysis of user-generated content was conducted through MAXQDA 2020 Analytics Pro software. Findings: The findings of this study indicate a growing trend in tourist preferences, with a notable increase in the popularity of wellness activities such as spa treatments and yoga retreats. Tourists also highly prefer cultural experiences like local festivals and historical tours, adventure activities such as hiking and water sports, and food-related activities like cooking classes and wine tastings. There is a significant trend towards sustainable and environmentally friendly tourism activities. These results underscore the need to cater to diverse tourist interests in developing future tourism offerings. Practical implications: Developing innovative events, using data-driven marketing strategies, involving local communities, and catering to diverse preferences can enhance the sustainability and competitiveness of the tourism sector. Social implications: Understanding tourists' tendencies towards cultural, adventurous and sustainable experiences helps tourism operators and managers to create offers that satisfy tourists while promoting environmentally friendly practices. This shift promotes cultural preservation, environmental protection and community involvement. Originality/value: This study uniquely analyzes top-rated TripAdvisor activities to identify key trends in tourist preferences, highlighting the growing demand for cultural, adventurous, gastronomic, and sustainable tourism. [ABSTRACT FROM AUTHOR]
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- 2024
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12. A Phase Error Correction System for Bioimpedance Measurement Circuits.
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Nwokoye, Ifeabunike I. and Triantis, Iasonas F.
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DEMODULATION ,ELECTRIC impedance ,BIOELECTRIC impedance ,IMPEDANCE spectroscopy - Abstract
Bioimpedance sensing is widely used across a spectrum of biomedical applications. Among the different system architectures for measuring tissue impedance, synchronous detection or demodulation (SD) stands out for its lock-in amplifier utilising in-phase (I) and quadrature (Q) demodulation signals to derive real and imaginary impedance components. Typically, the current injected into the tissue is controlled by a voltage-controlled current source (VCCS). However, the VCCS can introduce phase shifts leading to discrepancies in real/imaginary outputs, especially at the highest end of the operating frequency bandwidth. Such discrepancies can significantly impact diagnostic accuracy in applications reliant on precise tissue phase profiling, such as cancer and neuromuscular evaluations. In the present work, we propose an automatic phase error compensation stage for bioimpedance measurement systems to minimise this systematic error. Our experimental findings demonstrated a considerable reduction in phase error, with the Phase Error Compensated Synchronous Detection (PECSD) system exhibiting a maximum phase error of 2° (≤5% error) compared with the uncompensated SD system where error exceeded 20%. The improvements made by our proposed SD system hold great potential for enhancing the accuracy of impedance measurements, particularly in clinical diagnosis and disease detection. [ABSTRACT FROM AUTHOR]
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- 2024
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13. Graphical Insight: Revolutionizing Seizure Detection with EEG Representation.
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Awais, Muhammad, Belhaouari, Samir Brahim, and Kassoul, Khelil
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GRAPH neural networks ,EPILEPSY ,ELECTROENCEPHALOGRAPHY ,SEIZURES (Medicine) ,REPRESENTATIONS of graphs - Abstract
Epilepsy is characterized by recurring seizures that result from abnormal electrical activity in the brain. These seizures manifest as various symptoms including muscle contractions and loss of consciousness. The challenging task of detecting epileptic seizures involves classifying electroencephalography (EEG) signals into ictal (seizure) and interictal (non-seizure) classes. This classification is crucial because it distinguishes between the states of seizure and seizure-free periods in patients with epilepsy. Our study presents an innovative approach for detecting seizures and neurological diseases using EEG signals by leveraging graph neural networks. This method effectively addresses EEG data processing challenges. We construct a graph representation of EEG signals by extracting features such as frequency-based, statistical-based, and Daubechies wavelet transform features. This graph representation allows for potential differentiation between seizure and non-seizure signals through visual inspection of the extracted features. To enhance seizure detection accuracy, we employ two models: one combining a graph convolutional network (GCN) with long short-term memory (LSTM) and the other combining a GCN with balanced random forest (BRF). Our experimental results reveal that both models significantly improve seizure detection accuracy, surpassing previous methods. Despite simplifying our approach by reducing channels, our research reveals a consistent performance, showing a significant advancement in neurodegenerative disease detection. Our models accurately identify seizures in EEG signals, underscoring the potential of graph neural networks. The streamlined method not only maintains effectiveness with fewer channels but also offers a visually distinguishable approach for discerning seizure classes. This research opens avenues for EEG analysis, emphasizing the impact of graph representations in advancing our understanding of neurodegenerative diseases. [ABSTRACT FROM AUTHOR]
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- 2024
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14. Epidemiological, Virulence, and Antibiotic Resistance Analysis of Klebsiella pneumoniae , a Major Source of Threat to Livestock and Poultry in Some Regions of Xinjiang, China.
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Hou, Gongmingzhu, Ahmad, Sajjad, Li, Yanfang, Yan, Duo, Yang, Shuhan, Chen, Siqi, Qiu, Zhengqing, Yu, Xingyu, Li, Nana, Li, Yang, Liang, Yan, Leng, Qingwen, and Qu, Yonggang
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DRUG resistance in bacteria ,KLEBSIELLA pneumoniae ,SWINE ,SWINE farms ,POULTRY ,LIVESTOCK ,MICROBIAL sensitivity tests ,BROILER chickens - Abstract
Simple Summary: The current study aimed to investigate the virulence and resistance genes associated with Klebsiella pneumoniae isolated from the farms of four animal species in selected areas of Xinjiang, China, encompassing cows, sheep, chickens, and pigs. The sensitivity to antibiotics was evaluated. Genetic diversity was assessed using wzi allele typing and multilocus sequence typing. The findings shed light on the antibiotic resistance patterns and genetic diversity among K. pneumoniae isolates originating from different animal sources, highlighting the potential for inter-species transmission of this bacterium. Klebsiella pneumoniae (K. pneumoniae) is recognized as a zoonotic pathogen with an increasing threat to livestock and poultry. However, research on K. pneumoniae of animal origin remains limited. To address the gap, a comprehensive investigation was carried out by collecting a total of 311 samples from the farms of four animal species (dairy cow, chicken, sheep, and pig) in selected areas of Xinjiang, China. Isolates were identified by khe gene amplification and 16S rRNA gene sequencing. Genotyping of K. pneumonia isolates was performed using wzi typing and multilocus sequence typing (MLST). PCR was employed to identify virulence and resistance genes. An antibiotic susceptibility test was conducted using the Kirby–Bauer method. The findings revealed an isolation of 62 K. pneumoniae strains, with an average isolation rate of 19.94%, with the highest proportion originating from cattle sources (33.33%). Over 85.00% of these isolates harbored six virulence genes (wabG, uge, fimH, markD, entB, and ureA); while more than 75.00% of isolates possessed four resistance genes (bla
TEM , blaSHV , oqxA, and gyrA). All isolates exhibited complete resistance to ampicillin and demonstrated substantial resistance to sulfisoxazole, amoxicillin/clavulanic acid, and enrofloxacin, with an antibiotic resistance rate of more than 50%. Furthermore, 48.39% (30/62) of isolates were classified as multidrug-resistant (MDR) strains, with a significantly higher isolation rate observed in the swine farms (66.67%) compared to other farms. Genetic characterization revealed the classification of the 62 isolates into 30 distinct wzi allele types or 35 different sequence types (STs). Notably, we identified K. pneumoniae strains of dairy and swine origin belonging to the same ST42 and wzi33-KL64 types, as well as strains of dairy and chicken origin belonging to the same wzi31-KL31-K31 type. These findings emphasize the widespread occurrence of drug-resistant K. pneumoniae across diverse animal sources in Xinjiang, underscoring the high prevalence of multidrug resistance. Additionally, our results suggest the potential for animal-to-animal transmission of K. pneumoniae and there was a correlation between virulence genes and antibiotic resistance genes. Moreover, the current study provides valuable data on the prevalence, antibiotic resistance, and genetic diversity of K. pneumoniae originating from diverse animal sources in Xinjiang, China. [ABSTRACT FROM AUTHOR]- Published
- 2024
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15. Beyond Pain: The Effects of OnabotulinumtoxinA Therapy on Sensitization and Interictal Symptoms in Chronic Migraine.
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Alonge, Paolo, Brighina, Filippo, Maccora, Simona, Pilati, Laura, Di Marco, Salvatore, Ventimiglia, Davide, Maggio, Bruna, Cutrò, Ivana, Camarda, Cecilia, and Torrente, Angelo
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SUMATRIPTAN ,MIGRAINE ,QUALITY of work life ,MEDICATION abuse ,SYMPTOMS ,BOTULINUM A toxins ,SPREADING cortical depression ,NEURAL stimulation - Abstract
Chronic migraine is a disease with a high burden on patients from both a working and quality of life point of view. The pathophysiology of this subtype of migraine is due to several factors, such as medication overuse. Nevertheless, the detrimental recurring of headache attacks with central and peripheral sensitization plays a central role and explains some additional symptoms complained about by these patients even in the interictal phase. OnabotulinumtoxinA is a therapy indicated for chronic migraine since it has proven to reduce peripheral sensitization, showing even efficacy on central symptoms. The aim of this narrative review is to present the current evidence regarding the effect of OnabotulinumtoxinA on sensitization and interictal symptoms. [ABSTRACT FROM AUTHOR]
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- 2024
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16. Does investor sentiment impact premiums in M&A transactions?
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Hervé, Fabrice, Rouine, Ibtissem, Thraya, Mohamed-Firas, and Zouaoui, Mohamed
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MARKET sentiment ,MERGERS & acquisitions - Abstract
Copyright of Management international / International Management / Gestiòn Internacional is the property of Management International 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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17. Clinical and Microbiologic Analysis of Klebsiella pneumoniae Infection: Hypermucoviscosity, Virulence Factor, Genotype, and Antimicrobial Susceptibility.
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Hyun, Miri, Lee, Ji Yeon, and Kim, Hyun Ah
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KLEBSIELLA pneumoniae ,KLEBSIELLA infections ,LIVER abscesses ,LOGISTIC regression analysis ,GENOTYPES - Abstract
Hypervirulent Klebsiella pneumoniae (KP) is defined according to hypermucoviscosity or various virulence factors and is clinically associated with community-acquired liver abscess (CLA). In this study, we investigated the clinical and microbiological characteristics of KP and significant factors associated with hypervirulence. The clinical characteristics, antimicrobial susceptibility, hypermucoviscosity, serotypes, hypervirulence-related genes, and biofilm formation of 414 KP isolates collected from the Keimyung University Dongsan Hospital between December 2013 and November 2015 were analyzed according to CLA. Significant risk factors for hypervirulent KP (HvKP) associated with CLA were investigated using logistic regression analysis. Notably, 155 (37.4%) isolates were hypermucoviscous, and 170 (41.1%) harbored aerobactin. CLA was present in 34 cases (8.2%). Epidemiology and treatment outcomes did not differ significantly between the CLA and non-CLA groups. The CLA group had significantly higher antibiotic susceptibility, K1/K2, rmpA, magA, allS, kfu, iutA, string test-positive result, and biofilm mass. Multivariate logistic regression revealed rmpA (OR, 5.67; 95% CI, 2.09–15.33; p = 0.001), magA (OR, 2.34; 95% CI, 1.01–5.40; p = 0.047), and biofilm mass >0.80 (OR, 2.13; 95% CI, 1.00–4.56; p = 0.050) as significant risk factors for CLA. rmpA was identified as the most significant risk factor for CLA among KP strains, implying that it is an important factor associated with HvKP. [ABSTRACT FROM AUTHOR]
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- 2024
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18. Building a Hierarchical Enablers Framework for Service Business Model Innovation for Sustainable Performance: Evidence from Ghana's Electricity Sector.
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Arku, Jason Kobina, Shao, Yunfei, and Ankrah, Shadrach Twumasi
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Selecting an appropriate business model innovation for sustainable performance is a complex decision that requires a decision support tool. However, despite the importance of business model innovation (BMI) for sustainable performance, there has been limited investigation into how a hierarchical enabler framework grounded in service-dominant logic contributes to the sustainability of service firms. This study examines the critical enablers of service business model innovation (SBMI) for sustainable performance within the utility sector, particularly the electricity supply sector in Ghana. Using the best–worst method (BWM), this study identifies and prioritizes three main enablers and eleven sub-enablers, addressing a notable gap in understanding their impact on sustainable performance. The findings reveal that service value creation innovation is the most critical primary enabler, with human capital, technological platforms, and value-based pricing constituting the top three sub-enablers for sustainability performance. This study contributes to the service-dominant logic and BMI discourse by providing a novel hierarchical framework that aids managerial decision making in service-oriented firms, particularly in developing economies. The results underscore the need for utility companies to prioritize investments in key areas, such as human capital, technological advancements, and customer-centric approaches, to drive sustainable business practices and improve overall performance. [ABSTRACT FROM AUTHOR]
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- 2024
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19. Metformin: A Dual-Role Player in Cancer Treatment and Prevention.
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Galal, Mariam Ahmed, Al-Rimawi, Mohammed, Hajeer, Abdurrahman, Dahman, Huda, Alouch, Samhar, and Aljada, Ahmad
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METFORMIN ,CANCER prevention ,CANCER treatment ,TYPE 2 diabetes ,ADJUVANT chemotherapy ,CANCER chemotherapy - Abstract
Cancer continues to pose a significant global health challenge, as evidenced by the increasing incidence rates and high mortality rates, despite the advancements made in chemotherapy. The emergence of chemoresistance further complicates the effectiveness of treatment. However, there is growing interest in the potential of metformin, a commonly prescribed drug for type 2 diabetes mellitus (T2DM), as an adjuvant chemotherapy agent in cancer treatment. Although the precise mechanism of action of metformin in cancer therapy is not fully understood, it has been found to have pleiotropic effects, including the modulation of metabolic pathways, reduction in inflammation, and the regulation of cellular proliferation. This comprehensive review examines the anticancer properties of metformin, drawing insights from various studies conducted in vitro and in vivo, as well as from clinical trials and observational research. This review discusses the mechanisms of action involving both insulin-dependent and independent pathways, shedding light on the potential of metformin as a therapeutic agent for different types of cancer. Despite promising findings, there are challenges that need to be addressed, such as conflicting outcomes in clinical trials, considerations regarding dosing, and the development of resistance. These challenges highlight the importance of further research to fully harness the therapeutic potential of metformin in cancer treatment. The aims of this review are to provide a contemporary understanding of the role of metformin in cancer therapy and identify areas for future exploration in the pursuit of effective anticancer strategies. [ABSTRACT FROM AUTHOR]
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- 2024
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20. Recent Developments in Engineering Non-Paralytic Botulinum Molecules for Therapeutic Applications.
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Zhantleuova, Aisha, Leese, Charlotte, Andreou, Anna P., Karimova, Altynay, Carpenter, Guy, and Davletov, Bazbek
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BOTULINUM toxin ,MOLECULES ,NEUROTOXIC agents ,NEUROLOGICAL disorders - Abstract
This review discusses the expanding application of botulinum neurotoxin in treating neurological conditions. The article specifically explores novel approaches to using non-paralytic botulinum molecules. These new molecules, such as BiTox or el-iBoNT, offer an alternative for patients who face limitations in using paralytic forms of botulinum neurotoxin due to concerns about muscle function loss. We highlight the research findings that confirm not only the effectiveness of these molecules but also their reduced paralytic effect. We also discuss a potential cause for the diminished paralytic action of these molecules, specifically changes in the spatial parameters of the new botulinum molecules. In summary, this article reviews the current research that enhances our understanding of the application of new botulinum neurotoxins in the context of common conditions and suggests new avenues for developing more efficient molecules. [ABSTRACT FROM AUTHOR]
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- 2024
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21. Bacteriophage–Host Interactions and the Therapeutic Potential of Bacteriophages.
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Dicks, Leon M. T. and Vermeulen, Wian
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BACTERIOPHAGES ,BACTERIAL cell surfaces ,BACTERIAL cells ,LIPOTEICHOIC acid ,BACTERIAL adhesion ,BACTERIAL diseases - Abstract
Healthcare faces a major problem with the increased emergence of antimicrobial resistance due to over-prescribing antibiotics. Bacteriophages may provide a solution to the treatment of bacterial infections given their specificity. Enzymes such as endolysins, exolysins, endopeptidases, endosialidases, and depolymerases produced by phages interact with bacterial surfaces, cell wall components, and exopolysaccharides, and may even destroy biofilms. Enzymatic cleavage of the host cell envelope components exposes specific receptors required for phage adhesion. Gram-positive bacteria are susceptible to phage infiltration through their peptidoglycan, cell wall teichoic acid (WTA), lipoteichoic acids (LTAs), and flagella. In Gram-negative bacteria, lipopolysaccharides (LPSs), pili, and capsules serve as targets. Defense mechanisms used by bacteria differ and include physical barriers (e.g., capsules) or endogenous mechanisms such as clustered regularly interspaced palindromic repeat (CRISPR)-associated protein (Cas) systems. Phage proteins stimulate immune responses against specific pathogens and improve antibiotic susceptibility. This review discusses the attachment of phages to bacterial cells, the penetration of bacterial cells, the use of phages in the treatment of bacterial infections, and the limitations of phage therapy. The therapeutic potential of phage-derived proteins and the impact that genomically engineered phages may have in the treatment of infections are summarized. [ABSTRACT FROM AUTHOR]
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- 2024
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22. Calocedrus formosana Essential Oils Induce ROS-Mediated Autophagy and Apoptosis by Targeting SIRT1 in Colon Cancer Cells.
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Islam, Atikul, Chang, Yu-Chun, Tsao, Nai-Wen, Wang, Sheng-Yang, and Chueh, Pin Ju
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COLON cancer ,CANCER cells ,ESSENTIAL oils ,AUTOPHAGY ,CANCER cell proliferation ,SIRTUINS ,NAD (Coenzyme) - Abstract
Colorectal cancer is the most common cancer that affects both sexes and has a poor prognosis due to aggressiveness and chemoresistance. Essential oils isolated from Calocedrus formosana (CF-EOs) have been shown to demonstrate anti-termite, antifungal, anti-mosquito, and anti-microbial activities. However, the anticancer effects of CF-EOs are not yet fully understood. Therefore, the present study aimed to explore the molecular mechanism underlying CF-EOs-mediated anti-proliferative activity in colon cancer cells. Here, cell impedance measurements showed that CF-EOs inhibit proliferation in colon cancer cells with wild-type or mutant p53. Flow cytometry revealed that CF-EOs at 20, 50 µg/mL significantly induced ROS generation and autophagy in both HCT116 p53-wt and HCT116 p53-null cell lines, whereas pretreatment with the ROS scavenger N-acetyl cysteine (NAC) markedly attenuated these changes. CF-EOs also induced apoptosis at 50 µg/mL in both lines, as determined by flow cytometry. Protein analysis showed that CF-EOs markedly induced apoptosis markers, including Trail, cleaved caspase-3, cleaved caspase-9, and cleaved PARP, as well as autophagy markers, such as the levels of ULK1, Atg5, Atg6, Atg7, and the conversion of LC3-I to LC3-II. CF-EOs were further found to inhibit the activity and expression of the NAD
+ -dependent deacetylase SIRT1 to increase the levels of acetylated p53 (Ac-p53) in p53-wt cells and acetylated c-Myc (Ac-c-Myc) in p53-null cells, ultimately inducing apoptosis in both lines. Interestingly, suppression of SIRT1 by CF-EOs enhanced the acetylation of ULK1, which in turn prompted ROS-dependent autophagy in colon cancer cells. The induction of apoptosis and autophagy by CF-EOs suggests that they may have potential as a promising new approach for treating cancer. Collectively, our results suggest that essential oils isolated from Calocedrus formosana act as a promising anticancer agent against colon cancer cells by targeting SIRT1 to induce ROS-mediated autophagy and apoptosis. [ABSTRACT FROM AUTHOR]- Published
- 2024
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23. Knockdown of Antisense Noncoding Mitochondrial RNA Reduces Tumorigenicity of Patient-Derived Clear Cell Renal Carcinoma Cells in an Orthotopic Xenograft Mouse Model.
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Araya, Mariela, Sepúlveda, Francisca, Villegas, Jaime, Alarcón, Luis, Burzio, Luis O., Burzio, Verónica A., and Borgna, Vincenzo
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RENAL cell carcinoma ,IN vitro studies ,IN vivo studies ,CELL culture ,ANIMAL experimentation ,MITOCHONDRIAL RNA ,SURVIVAL analysis (Biometry) ,RESEARCH funding ,CELL proliferation ,GENETIC techniques ,MICE - Abstract
Simple Summary: The most common form of kidney cancer is clear cell renal cell carcinoma, but its treatment is challenging due to the acquisition of resistance to existing therapies. We propose an alternative potential treatment based on targeting a non-coding RNA of mitochondrial origin, termed antisense non-coding mitochondrial RNA. Supporting this strategy is the data we present in this work, using cell cultures obtained directly from primary and metastatic patient tumors, showing that the treatment causes a stall in cell proliferation in both in vitro and in vivo mouse models, and significantly improve the survival of animals. The results from this study strongly support the use of this strategy for the development of an alternative therapeutic approach for ccRCC patients and potentially other types of renal cancer. Clear cell renal cell carcinoma (ccRCC) is the most prevalent form of renal cancer and its treatment is hindered by a resistance to targeted therapies, immunotherapies and combinations of both. We have reported that the knockdown of the antisense noncoding mitochondrial RNAs (ASncmtRNAs) with chemically modified antisense oligonucleotides induces proliferative arrest and apoptotic death in tumor cells from many human and mouse cancer types. These studies have been mostly performed in vitro and in vivo on commercially available cancer cell lines and have shown that in mouse models tumor growth is stunted by the treatment. The present work was performed on cells derived from primary and metastatic ccRCC tumors. We established primary cultures from primary and metastatic ccRCC tumors, which were subjected to knockdown of ASncmtRNAs in vitro and in vivo in an orthotopic xenograft model in NOD/SCID mice. We found that these primary ccRCC cells are affected in the same way as tumor cell lines and in the orthotopic model tumor growth was significantly reduced by the treatment. This study on patient-derived ccRCC tumor cells represents a model closer to actual patient ccRCC tumors and shows that knockdown of ASncmtRNAs poses a potential treatment option for these patients. [ABSTRACT FROM AUTHOR]
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- 2024
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24. Using Remote Sensing Multispectral Imagery for Invasive Species Quantification: The Effect of Image Resolution on Area and Biomass Estimation.
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Meyer, Manuel de Figueiredo, Gonçalves, José Alberto, and Bio, Ana Maria Ferreira
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BIOMASS estimation ,REMOTE sensing ,SUPERVISED learning ,STANDARD deviations ,INTRODUCED species ,MULTISPECTRAL imaging - Abstract
This study assesses the applicability of different-resolution multispectral remote sensing images for mapping and estimating the aboveground biomass (AGB) of Carpobrotus edulis, a prominent invasive species in European coastal areas. This study was carried out on the Cávado estuary sand spit (Portugal). The performance of three sets of multispectral images with different Ground Sample Distances (GSDs) were compared: 2.5 cm, 5 cm, and 10 cm. The images were classified using the supervised classification algorithm random forest and later improved by applying a sieve filter. Samples of C. edulis were also collected, dried, and weighed to estimate the AGB using the relationship between the dry weight (DW) and vegetation indices (VIs). The resulting regression models were evaluated based on their coefficient of determination (R
2 ), Normalised Root Mean Square Error (NRMSE), p-value, Akaike information criterion (AIC), and the Bayesian information criterion (BIC). The results show that the three tested image resolutions allow for constructing reliable coverage maps of C. edulis, with overall accuracy values of 89%, 85%, and 88% for the classification of the 2.5 cm, 5 cm, and 10 cm GSD images, respectively. The best-performing VI-DW regression models achieved R2 = 0.87 and NRMSE = 0.09 for the 2.5 cm resolution; R2 = 0.77 and NRMSE = 0.12 for the 5 cm resolution; and R2 = 0.64 and NRMSE = 0.15 for the 10 cm resolution. The C. edulis area and total AGB were 3441.10 m2 and 28,327.1 kg (with an AGB relative error (RE) = 0.08) for the 2.5 cm resolution; 3070.04 m2 and 29,170.8 kg (AGB RE = 0.08) for the 5 cm resolution; and 2305.06 m2 and 22,135.7 kg (AGB RE = 0.11) for the 10 cm resolution. Spatial and model differences were analysed in detail to determine their causes. Final analyses suggest that multispectral imagery of up to 5 cm GSD is adequate for estimating C. edulis distribution and biomass. [ABSTRACT FROM AUTHOR]- Published
- 2024
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25. A Proposal for Neurography Referral in Patients with Carpal Tunnel Syndrome Based on Clinical Symptoms and Demographic Variables of 797 Patients.
- Author
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Vázquez-Sánchez, Fernando, Gómez-Menéndez, Ana Isabel, López-Veloso, María, Calvo-Simal, Sara, Lloria-Gil, María Carmen, González-Santos, Josefa, Muñoz-Alcaraz, María Nieves, Jiménez-Vilchez, Antonio José, González-Bernal, Jerónimo J., and García-López, Beatriz
- Subjects
CARPAL tunnel syndrome ,MEDICAL referrals ,SYMPTOMS ,MEDIAN nerve ,NERVE conduction studies - Abstract
The clinical manifestation of median nerve entrapment at the carpal tunnel level is known as carpal tunnel syndrome (CTS). Electroneurography (ENG) is considered the gold standard in CTS evaluation. We conducted a retrospective study and analyzed some clinical and demographic variables, relating them to the degree of neuropathy using ENG, to better understand the role of ENG in this very common disease. We studied 816 patients referred to our service for neurographic evaluation. Their symptoms were classified as compatible with CTS (cCTS) (n = 646) and atypical for CTS (aCTS) (n = 170). A blind ENG was performed on 797 patients. Patient characteristics were coded as variables and analyzed to study whether they could predict neuropathy severity (sensory and motor involvement or grade ≥ 3 in our classification). We found a correlation between typical symptomatology, age over 50 years, male gender, positivity of Phalen's maneuver and Tinel's sign, and a neuropathy grade ≥ 3. We also found a correlation with CTS in the contralateral hand if the other hand showed neuropathy, despite the lack of symptoms in this hand. We propose a practical algorithm for ENG referral based on clinical symptoms, demographic factors, and neurophysiological variables. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. Hypervirulent Capsular Serotypes K1 and K2 Klebsiella pneumoniae Strains Demonstrate Resistance to Serum Bactericidal Activity and Galleria mellonella Lethality.
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AL-Busaidi, Basaier, AL-Muzahmi, Muna, AL-Shabibi, Zahra, Rizvi, Meher, AL-Rashdi, Azza, AL-Jardani, Amina, Farzand, Robeena, and AL-Jabri, Zaaima
- Subjects
GREATER wax moth ,KLEBSIELLA pneumoniae ,PYOGENIC liver abscess ,CRITICALLY ill patient care ,WHOLE genome sequencing ,PLANT growth ,INSECT nematodes - Abstract
Hypervirulent Klebsiella pneumoniae (hvKp) is a variant that has been increasingly linked to severe, life-threatening infections including pyogenic liver abscess and bloodstream infections. HvKps belonging to the capsular serotypes K1 and K2 have been reported worldwide, however, very scarce studies are available on their genomics and virulence. In the current study, we report four hypermucoviscous extended-spectrum β-lactamase-producing hvKp clinical strains of capsular serotype K1 and K2 isolated from pus and urine of critically ill patients in tertiary care hospitals in Oman. These strains belong to diverse sequence types (STs), namely ST-23(K1), ST-231(K2), ST-881(K2), and ST-14(K2). To study their virulence, a Galleria mellonella model and resistance to human serum killing were used. The G. mellonella model revealed that the K1/ST-23 isolate was the most virulent, as 50% of the larvae died in the first day, followed by isolate K2/ST-231 and K2/ST-14, for which 75% and 50% of the larvae died in the second day, respectively. Resistance to human serum killing showed there was complete inhibition of bacterial growth of all four isolates by the end of the first hour and up to the third hour. Whole genome sequencing (WGS) revealed that hvKp strains display a unique genetic arrangement of k-loci. Whole-genome single-nucleotide polymorphism-based phylogenetic analysis revealed that these hvKp isolates were phylogenetically distinct, belonging to diverse clades, and belonged to different STs in comparison to global isolates. For ST-23(K1), ST-231(K2), ST-881(K2), and ST-14(K2), there was a gradual decrease in the number of colonies up to the second to third hour, which indicates neutralization of bacterial cells by the serum components. However, this was followed by a sudden increase of bacterial growth, indicating possible resistance of bacteria against human serum bactericidal activity. This is the first report from Oman detailing the WGS of hvKp clinical isolates and assessing their resistance and virulence genomics, which reinforce our understanding of their epidemiology and dissemination in clinical settings. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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27. Changes in the Dentate Gyrus Gene Expression Profile Induced by Levetiracetam Treatment in Rats with Mesial Temporal Lobe Epilepsy.
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Diaz-Villegas, Veronica, Pichardo-Macías, Luz Adriana, Juárez-Méndez, Sergio, Ignacio-Mejía, Iván, Cárdenas-Rodríguez, Noemí, Vargas-Hernández, Marco Antonio, Mendoza-Torreblanca, Julieta Griselda, and Zamudio, Sergio R.
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TEMPORAL lobe epilepsy ,DENTATE gyrus ,GENE expression profiling ,LEVETIRACETAM ,GENE expression ,HOMEOSTASIS - Abstract
Temporal lobe epilepsy (TLE) is one of the most common forms of focal epilepsy. Levetiracetam (LEV) is an antiepileptic drug whose mechanism of action at the genetic level has not been fully described. Therefore, the aim of the present work was to evaluate the relevant gene expression changes in the dentate gyrus (DG) of LEV-treated rats with pilocarpine-induced TLE. Whole-transcriptome microarrays were used to obtain the differential genetic profiles of control (CTRL), epileptic (EPI), and EPI rats treated for one week with LEV (EPI + LEV). Quantitative RT–qPCR was used to evaluate the RNA levels of the genes of interest. According to the results of the EPI vs. CTRL analysis, 685 genes were differentially expressed, 355 of which were underexpressed and 330 of which were overexpressed. According to the analysis of the EPI + LEV vs. EPI groups, 675 genes were differentially expressed, 477 of which were downregulated and 198 of which were upregulated. A total of 94 genes whose expression was altered by epilepsy and modified by LEV were identified. The RT–qPCR confirmed that LEV treatment reversed the increased expression of Hgf mRNA and decreased the expression of the Efcab1, Adam8, Slc24a1, and Serpinb1a genes in the DG. These results indicate that LEV could be involved in nonclassical mechanisms involved in Ca
2+ homeostasis and the regulation of the mTOR pathway through Efcab1, Hgf, SLC24a1, Adam8, and Serpinb1a, contributing to reduced hyperexcitability in TLE patients. [ABSTRACT FROM AUTHOR]- Published
- 2024
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28. Negative Association of Lignan and Phytosterol Intake with Stress Perception during the COVID-19 Pandemic—A Polish Study on Young Adults.
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Micek, Agnieszka, Jagielski, Paweł, Bolesławska, Izabela, Witkowska, Anna Maria, Waśkiewicz, Anna, Wajda, Zbigniew, Kamińska, Anna, Cebula, Aneta, and Godos, Justyna
- Abstract
Background: There has been an increasing global prevalence of depression and other psychiatric diseases in recent years. Perceived stress has been proven to be associated with psychiatric and somatic symptoms. Some animal and human studies have suggested that consuming foods abundant in lignans and phytosterols may be associated with lower levels of stress, depression, and anxiety. Still, the evidence is not yet strong enough to draw firm conclusions. Thus, we investigated the association between dietary intake of these phytochemicals and the level of stress experienced by adult individuals. Methods: Diet was assessed using self-reported 7-day dietary records. The intakes of lignans and phytosterols were estimated using databases with their content in various food products. The Perceived Stress Scale (PSS) was implemented to measure the level of perceived stress. A logistic regression analysis was used to test for associations. Results: The odds of elevated PSS were negatively associated with dietary intake of total phytosterols, stigmasterol, and β-sitosterol, with evidence of a decreasing trend across tertiles of phytochemicals. The analysis for doubling the intake reinforced the aforementioned relationships and found protective effects against PSS for total lignans, pinoresinol, and campesterol. Conclusions: Habitual inclusion of lignans and phytosterols in the diet may play a role in psychological health. To address the global outbreak of depression and other mental health issues triggered by stress, it is important to take a holistic approach. There is a need to develop effective strategies for prevention and treatment, among which certain dietary interventions such as consumption of products abundant in lignans and phytosterols may play a substantial role. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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29. Parallel Ictal-Net, a Parallel CNN Architecture with Efficient Channel Attention for Seizure Detection.
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Hernández-Nava, Gerardo, Salazar-Colores, Sebastián, Cabal-Yepez, Eduardo, and Ramos-Arreguín, Juan-Manuel
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PARALLEL processing ,SEIZURES (Medicine) ,PSYCHOLOGICAL distress ,EPILEPSY ,NEUROLOGICAL disorders ,PILOCARPINE - Abstract
Around 70 million people worldwide are affected by epilepsy, a neurological disorder characterized by non-induced seizures that occur at irregular and unpredictable intervals. During an epileptic seizure, transient symptoms emerge as a result of extreme abnormal neural activity. Epilepsy imposes limitations on individuals and has a significant impact on the lives of their families. Therefore, the development of reliable diagnostic tools for the early detection of this condition is considered beneficial to alleviate the social and emotional distress experienced by patients. While the Bonn University dataset contains five collections of EEG data, not many studies specifically focus on subsets D and E. These subsets correspond to EEG recordings from the epileptogenic zone during ictal and interictal events. In this work, the parallel ictal-net (PIN) neural network architecture is introduced, which utilizes scalograms obtained through a continuous wavelet transform to achieve the high-accuracy classification of EEG signals into ictal or interictal states. The results obtained demonstrate the effectiveness of the proposed PIN model in distinguishing between ictal and interictal events with a high degree of confidence. This is validated by the computing accuracy, precision, recall, and F1 scores, all of which consistently achieve around 99% confidence, surpassing previous approaches in the related literature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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30. Molecular Mechanism of Natural Food Antioxidants to Regulate ROS in Treating Cancer: A Review.
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Muchtaridi, Muchtaridi, Az-Zahra, Farhah, Wongso, Hendris, Setyawati, Luthfi Utami, Novitasari, Dhania, and Ikram, Emmy Hainida Khairul
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CANCER cell proliferation ,REACTIVE oxygen species ,OXIDATIVE stress ,DNA damage ,ANTIOXIDANTS - Abstract
Cancer is the second-highest mortality rate disease worldwide, and it has been estimated that cancer will increase by up to 20 million cases yearly by 2030. There are various options of treatment for cancer, including surgery, radiotherapy, and chemotherapy. All of these options have damaging adverse effects that can reduce the patient's quality of life. Cancer itself arises from a series of mutations in normal cells that generate the ability to divide uncontrollably. This cell mutation can happen as a result of DNA damage induced by the high concentration of ROS in normal cells. High levels of reactive oxygen species (ROS) can cause oxidative stress, which can initiate cancer cell proliferation. On the other hand, the cytotoxic effect from elevated ROS levels can be utilized as anticancer therapy. Some bioactive compounds from natural foods such as fruit, vegetables, herbs, honey, and many more have been identified as a promising source of natural antioxidants that can prevent oxidative stress by regulating the level of ROS in the body. In this review, we have highlighted and discussed the benefits of various natural antioxidant compounds from natural foods that can regulate reactive oxygen species through various pathways. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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31. General Overview of Klebsiella pneumonia : Epidemiology and the Role of Siderophores in Its Pathogenicity.
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Abbas, Rim, Chakkour, Mohamed, Zein El Dine, Hiba, Obaseki, Eseiwi Folorunsho, Obeid, Soumaya T., Jezzini, Aya, Ghssein, Ghassan, and Ezzeddine, Zeinab
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KLEBSIELLA pneumoniae ,KLEBSIELLA infections ,SIDEROPHORES ,URINARY tract infections ,EPIDEMIOLOGY ,LIVER abscesses - Abstract
Simple Summary: Numerous diseases, such as liver abscesses, bacteremias, pneumonia, and urinary tract infections, are caused by Klebsiella pneumonia (K. pneumonia). Historically, immunocompromised patients have been the main target of serious infections induced by K. pneumoniae. However, with the recent appearance and dissemination of hypervirulent strains, healthy individuals have also become susceptible to infection. Moreover, treating K. pneumoniae infections is extremely difficult due to the strains' increased antibiotic resistance. This review summarizes the various virulence factors of this bacterium, especially metallophores. The bacteriology, pathology, and epidemiology of K. pneumonia are also included in this review. The opportunistic pathogen Klebsiella pneumoniae (K. pneumoniae) can colonize mucosal surfaces and spread from mucosae to other tissues, causing fatal infections. Medical equipment and the healthcare setting can become colonized by Klebsiella species, which are widely distributed in nature and can be found in water, soil, and animals. Moreover, a substantial number of community-acquired illnesses are also caused by this organism worldwide. These infections are characterized by a high rate of morbidity and mortality as well as the capacity to spread metastatically. Hypervirulent Klebsiella strains are thought to be connected to these infections. Four components are critical to this bacterium's pathogenicity—the capsule, lipopolysaccharide, fimbriae, and siderophores. Siderophores are secondary metabolites that allow iron to sequester from the surrounding medium and transport it to the intracellular compartment of the bacteria. A number of variables may lead to K. pneumoniae colonization in a specific area. Risk factors for infection include local healthcare practices, antibiotic use and misuse, infection control procedures, nutrition, gender, and age. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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32. Optimum feature for high dimensional common-mean multiclass classification
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Hsieh, P.F., primary and Lee, L.C., additional
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33. Empirical mode decomposition for dimensionality reduction of hyperspectral data
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Wu, K.L., primary and Hsieh, P.F., additional
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34. Bacteriophage S6 requires bacterial cellulose for Erwinia amylovora infection.
- Author
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Knecht LE, Heinrich N, Born Y, Felder K, Pelludat C, Loessner MJ, and Fieseler L
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- Cellulose metabolism, Plant Diseases microbiology, Bacteriophages genetics, Erwinia amylovora genetics, Erwinia amylovora metabolism, Podoviridae genetics
- Abstract
Bacteriophages are highly selective in targeting bacteria. This selectivity relies on the specific adsorption of phages to the host cell surface. In this study, a Tn5 transposon mutant library of Erwinia amylovora, the causative agent of fire blight, was screened to identify bacterial receptors required for infection by the podovirus S6. Phage S6 was unable to infect mutants with defects in the bacterial cellulose synthase operon (bcs). The Bcs complex produces and secretes bacterial cellulose, an extracellular polysaccharide associated with bacterial biofilms. Deletion of the bcs operon or associated genes (bcsA, bcsC and bcsZ) verified the crucial role of bacterial cellulose for S6 infection. Application of the cellulose binding dye Congo Red blocked infection by S6. We demonstrate that infective S6 virions degraded cellulose and that Gp95, a phage-encoded cellulase, is involved to catalyse the reaction. In planta S6 did not significantly inhibit fire blight symptom development. Moreover, deletion of bcs genes in E. amylovora did not affect bacterial virulence in blossom infections, indicating that sole application of cellulose targeting phages is less appropriate to biologically control E. amylovora. The interplay between cellulose synthesis, host cell infection and maintenance of the host cell population is discussed., (© 2022 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd.)
- Published
- 2022
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35. Molecular mechanism of specific DNA sequence recognition by NRF1.
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Liu, Ke, Li, Weifang, Xiao, Yuqing, Lei, Ming, Zhang, Ming, and Min, Jinrong
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- 2024
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36. Immunostimulatory Effect of Flagellin on MDR- Klebsiella -Infected Human Airway Epithelial Cells.
- Author
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van Linge, Christine C. A., Hulme, Katina D., Peters-Sengers, Hessel, Sirard, Jean-Claude, Goessens, Wil H. F., de Jong, Menno D., Russell, Colin A., de Vos, Alex F., and van der Poll, Tom
- Subjects
FLAGELLIN ,EPITHELIAL cells ,LUNGS ,KLEBSIELLA ,KLEBSIELLA pneumoniae ,TOLL-like receptors - Abstract
Pneumonia caused by multi-drug-resistant Klebsiella pneumoniae (MDR-Kpneu) poses a major public health threat, especially to immunocompromised or hospitalized patients. This study aimed to determine the immunostimulatory effect of the Toll-like receptor 5 ligand flagellin on primary human lung epithelial cells during infection with MDR-Kpneu. Human bronchial epithelial (HBE) cells, grown on an air–liquid interface, were inoculated with MDR-Kpneu on the apical side and treated during ongoing infection with antibiotics (meropenem) and/or flagellin on the basolateral and apical side, respectively; the antimicrobial and inflammatory effects of flagellin were determined in the presence or absence of meropenem. In the absence of meropenem, flagellin treatment of MDR-Kpneu-infected HBE cells increased the expression of antibacterial defense genes and the secretion of chemokines; moreover, supernatants of flagellin-exposed HBE cells activated blood neutrophils and monocytes. However, in the presence of meropenem, flagellin did not augment these responses compared to meropenem alone. Flagellin did not impact the outgrowth of MDR-Kpneu. Flagellin enhances antimicrobial gene expression and chemokine release by the MDR-Kpneu-infected primary human bronchial epithelium, which is associated with the release of mediators that activate neutrophils and monocytes. Topical flagellin therapy may have potential to boost immune responses in the lung during pneumonia. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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37. Bacterial tolerance and detoxification of cyanide, arsenic and heavy metals: Holistic approaches applied to bioremediation of industrial complex wastes.
- Author
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Olaya‐Abril, Alfonso, Biełło, Karolina, Rodríguez‐Caballero, Gema, Cabello, Purificación, Sáez, Lara P., Moreno‐Vivián, Conrado, Luque‐Almagro, Víctor Manuel, and Roldán, María Dolores
- Subjects
INDUSTRIAL wastes ,HEAVY metals ,BIOREMEDIATION ,ARSENIC ,POISONS ,IN situ bioremediation ,CYANIDES - Abstract
Cyanide is a highly toxic compound that is found in wastewaters generated from different industrial activities, such as mining or jewellery. These residues usually contain high concentrations of other toxic pollutants like arsenic and heavy metals that may form different complexes with cyanide. To develop bioremediation strategies, it is necessary to know the metabolic processes involved in the tolerance and detoxification of these pollutants, but most of the current studies are focused on the characterization of the microbial responses to each one of these environmental hazards individually, and the effect of co‐contaminated wastes on microbial metabolism has been hardly addressed. This work summarizes the main strategies developed by bacteria to alleviate the effects of cyanide, arsenic and heavy metals, analysing interactions among these toxic chemicals. Additionally, it is discussed the role of systems biology and synthetic biology as tools for the development of bioremediation strategies of complex industrial wastes and co‐contaminated sites, emphasizing the importance and progress derived from meta‐omic studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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38. Crop Classification in Mountainous Areas Using Object-Oriented Methods and Multi-Source Data: A Case Study of Xishui County, China.
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Tian, Xiangyu, Chen, Zhengchao, Li, Yixiang, and Bai, Yongqing
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AGRICULTURAL remote sensing ,ORGANIC farming ,CROPS ,ENVIRONMENTAL security ,RANDOM forest algorithms - Abstract
Accurate crop mapping can represent the fundamental data for digital agriculture and ecological security. However, current crop classification methods perform poorly in mountainous areas with small cropland field parcel areas and multiple crops under cultivation. This study proposed a new object-oriented classification method to address this issue, using multi-source data and object features to achieve multi-crop classification in mountainous areas. Firstly, a deep learning method was employed to extract cropland field parcels in mountainous areas. Subsequently, the fusion of multi-source data was carried out based on cropland field parcels, while object features tailored for mountainous crops were designed for crop classification. Comparative analysis indicates that the proposed classification method demonstrates exceptional performance, enabling accurate mapping of various crops in mountainous regions. The F1 score and overall accuracy (OA) of the proposed method are 0.8449 and 0.8502, representing a 10% improvement over the pixel-based random forest classification results. Furthermore, qualitative analysis reveals that the proposed method exhibits higher classification accuracy for smaller plots and more precise delineation of crop boundaries. Finally, meticulous crop mapping of corn, sorghum, rice, and other crops in Xishui County, Guizhou Province, demonstrates the significant potential of the proposed method in crop classification within mountainous scenarios. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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39. Oral Immunization with Recombinant Saccharomyces cerevisiae Expressing Viral Capsid Protein 2 of Infectious Bursal Disease Virus Induces Unique Specific Antibodies and Protective Immunity.
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Li, Huliang, Hua, Deping, Qu, Qingxia, Cao, Hongwei, Feng, Zhehan, Liu, Na, Huang, Jinhai, and Zhang, Lei
- Subjects
INFECTIOUS bursal disease virus ,VIRAL proteins ,SACCHAROMYCES cerevisiae ,ORAL vaccines ,CIRCOVIRUS diseases ,IMMUNIZATION - Abstract
Infectious bursal disease (IBD), as a highly infectious immunosuppressive disease, causes severe economic losses in the poultry industry worldwide. Saccharomyces cerevisiae is an appealing vehicle used in oral vaccine formulations to safely and effectively deliver heterologous antigens. It can elicit systemic and mucosal responses. This study aims to explore the potential as oral an vaccine for S. cerevisiae expressing the capsid protein VP2 of IBDV. We constructed the recombinant S. cerevisiae, demonstrated that VP2 was displayed on the cell surface and had high immunoreactivity. By using the live ST1814G/Aga2-VP2 strain to immunize the mice, the results showed that recombinant S. cerevisiae significantly increased specific IgG and sIgA antibody titers, indicating the potential efficacy of vaccine-induced protection. These results suggested that the VP2 protein-expressing recombinant S. cerevisiae strain was a promising candidate oral subunit vaccine to prevent IBDV infection. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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40. Effect of a Depolymerase Encoded by Phage168 on a Carbapenem-Resistant Klebsiella pneumoniae and Its Biofilm.
- Author
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Sun, Xu, Pu, Bingchun, Qin, Jinhong, and Xiang, Jun
- Subjects
CARBAPENEM-resistant bacteria ,KLEBSIELLA pneumoniae ,BIOFILMS ,MOLECULAR weights ,ENCODING ,POLYMERASES ,BACTERIOPHAGES ,POLYMYXIN B - Abstract
Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) are becoming increasingly common within clinical settings, requiring the development of alternative therapies. In this study, we isolated, characterized, and sequenced the genome of a CRKP phage, Phage168. The total genomic DNA of Phage168 was 40,222 bp in length, encoding 49 predicted proteins. Among these proteins, Dep40, the gene product of ORF40, is a putative tail fiber protein that exhibits depolymerase activity based on the result of bioinformatics analyses. In vitro, we confirmed that the molecular weight of the Phage168 depolymerase protein was about 110 kDa, the concentration of the produced phage 168 depolymerase protein was quantified as being 1.2 mg/mL, and the depolymerase activity was still detectable after the dilution of 1.2 µg/mL. This recombinant depolymerase exhibited enzyme activity during the depolymerization of the formed CRKP biofilms. We also found that depolymerase, when combined with polymyxin B, was able to enhance the bactericidal effect of polymyxin B on CRKP strains by disrupting their biofilm. When recombinant depolymerase was used in combination with human serum, it enhanced the sensitivity of the CRKP strain UA168 to human serum, and the synergistic bactericidal effect reached the strongest level when the ratio of depolymerase to human serum was 3:1. Our results indicated that depolymerase encoded by Phage168 may be a promising strategy for combating infections caused by drug-resistant CRKP formed within the biofilm. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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41. Biomarkers for Prostate Cancer: From Diagnosis to Treatment.
- Author
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Chen, Jia-Yan, Wang, Pei-Yan, Liu, Ming-Zhu, Lyu, Feng, Ma, Ming-Wei, Ren, Xue-Ying, and Gao, Xian-Shu
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CANCER diagnosis ,TUMOR markers ,PROSTATE cancer ,GENE fusion ,PROGNOSIS ,DISEASE management - Abstract
Prostate cancer (PCa) is a widespread malignancy with global significance, which substantially affects cancer-related mortality. Its spectrum varies widely, from slow-progressing cases to aggressive or even lethal forms. Effective patient stratification into risk groups is crucial to therapeutic decisions and clinical trials. This review examines a wide range of diagnostic and prognostic biomarkers, several of which are integrated into clinical guidelines, such as the PHI, the 4K score, PCA3, Decipher, and Prolaris. It also explores the emergence of novel biomarkers supported by robust preclinical evidence, including urinary miRNAs and isoprostanes. Genetic alterations frequently identified in PCa, including BRCA1/BRCA2, ETS gene fusions, and AR changes, are also discussed, offering insights into risk assessment and precision treatment strategies. By evaluating the latest developments and applications of PCa biomarkers, this review contributes to an enhanced understanding of their role in disease management. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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42. Capsaicinoids and Their Effects on Cancer: The "Double-Edged Sword" Postulate from the Molecular Scale.
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Luján-Méndez, Francisco, Roldán-Padrón, Octavio, Castro-Ruíz, J. Eduardo, López-Martínez, Josué, and García-Gasca, Teresa
- Subjects
CAPSAICINOIDS ,EPITHELIAL-mesenchymal transition ,CHEMICAL species ,CYTOTOXINS ,AXIOMS - Abstract
Capsaicinoids are a unique chemical species resulting from a particular biosynthesis pathway of hot chilies (Capsicum spp.) that gives rise to 22 analogous compounds, all of which are TRPV1 agonists and, therefore, responsible for the pungency of Capsicum fruits. In addition to their human consumption, numerous ethnopharmacological uses of chili have emerged throughout history. Today, more than 25 years of basic research accredit a multifaceted bioactivity mainly to capsaicin, highlighting its antitumor properties mediated by cytotoxicity and immunological adjuvancy against at least 74 varieties of cancer, while non-cancer cells tend to have greater tolerance. However, despite the progress regarding the understanding of its mechanisms of action, the benefit and safety of capsaicinoids' pharmacological use remain subjects of discussion, since CAP also promotes epithelial–mesenchymal transition, in an ambivalence that has been referred to as "the double-edge sword". Here, we update the comparative discussion of relevant reports about capsaicinoids' bioactivity in a plethora of experimental models of cancer in terms of selectivity, efficacy, and safety. Through an integration of the underlying mechanisms, as well as inherent aspects of cancer biology, we propose mechanistic models regarding the dichotomy of their effects. Finally, we discuss a selection of in vivo evidence concerning capsaicinoids' immunomodulatory properties against cancer. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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43. Impact of Pharmacogenomics in Clinical Practice.
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Principi, Nicola, Petropulacos, Kyriakoula, and Esposito, Susanna
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MEDICAL personnel ,PHARMACOGENOMICS ,DRUG prescribing ,GENETIC variation ,DRUG efficacy ,GENETIC polymorphisms - Abstract
Polymorphisms of genes encoding drug metabolizing enzymes and transporters can significantly modify pharmacokinetics, and this can be associated with significant differences in drug efficacy, safety, and tolerability. Moreover, genetic variants of some components of the immune system can explain clinically relevant drug-related adverse events. However, the implementation of drug dose individualization based on pharmacogenomics remains scarce. In this narrative review, the impact of genetic variations on the disposition, safety, and tolerability of the most commonly prescribed drugs is reported. Moreover, reasons for poor implementation of pharmacogenomics in everyday clinical settings are discussed. The literature analysis showed that knowledge of how genetic variations can modify the effectiveness, safety, and tolerability of a drug can lead to the adjustment of usually recommended drug dosages, improve effectiveness, and reduce drug-related adverse events. Despite some efforts to introduce pharmacogenomics in clinical practice, presently very few centers routinely use genetic tests as a guide for drug prescription. The education of health care professionals seems critical to keep pace with the rapidly evolving field of pharmacogenomics. Moreover, multimodal algorithms that incorporate both clinical and genetic factors in drug prescribing could significantly help in this regard. Obviously, further studies which definitively establish which genetic variations play a role in conditioning drug effectiveness and safety are needed. Many problems must be solved, but the advantages for human health fully justify all the efforts. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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44. Polar Cloud Detection of FengYun-3D Medium Resolution Spectral Imager II Imagery Based on the Radiative Transfer Model.
- Author
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Dong, Shaojin, Gong, Cailan, Hu, Yong, Zheng, Fuqiang, and He, Zhijie
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RADIATIVE transfer ,RADIATIVE transfer equation ,MACHINE learning ,SOLAR spectra ,ALBEDO ,DATABASES ,REMOTE sensing - Abstract
The extensive existence of high-brightness ice and snow underlying surfaces in polar regions presents notable complexities for cloud detection in remote sensing imagery. To elevate the accuracy of cloud detection in polar regions, a novel polar cloud detection algorithm is proposed in this paper. Employing the MOD09 surface reflectance product, we compiled a database of monthly composite surface reflectance in the shortwave infrared bands specific to polar regions. Through the forward simulation of the correlation between the apparent reflectance and surface reflectance across diverse conditions using the 6S (Second Simulation of the Satellite Signal in the Solar Spectrum) radiative transfer model, we established a dynamic cloud detection model for the shortwave infrared channels. In contrast to a machine learning algorithm and the widely used MOD35 cloud product, the algorithm introduced in this study demonstrates enhanced congruence with the authentic cloud distribution within cloud products. It precisely distinguishes between the cloudy and clear-sky pixels, achieving rates surpassing 90% for both, while maintaining an error rate and a missing rate each under 10%. The algorithm yields positive results for cloud detection in polar regions, effectively distinguishing between ice, snow, and clouds. It provides robust support for comprehensive and long-term cloud detection efforts in polar regions. [ABSTRACT FROM AUTHOR]
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- 2023
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45. Hypothermic Protection in Neocortex Is Topographic and Laminar, Seizure Unmitigating, and Partially Rescues Neurons Depleted of RNA Splicing Protein Rbfox3/NeuN in Neonatal Hypoxic-Ischemic Male Piglets.
- Author
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Primiani, Christopher T., Lee, Jennifer K., O'Brien, Caitlin E., Chen, May W., Perin, Jamie, Kulikowicz, Ewa, Santos, Polan, Adams, Shawn, Lester, Bailey, Rivera-Diaz, Natalia, Olberding, Valerie, Niedzwiecki, Mark V., Ritzl, Eva K., Habela, Christa W., Liu, Xiuyun, Yang, Zeng-Jin, Koehler, Raymond C., and Martin, Lee J.
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RNA splicing ,PIGLETS ,NEOCORTEX ,HEMATOXYLIN & eosin staining ,NEURONS ,SOMATOSENSORY cortex ,INTERNEURONS - Abstract
The effects of hypothermia on neonatal encephalopathy may vary topographically and cytopathologically in the neocortex with manifestations potentially influenced by seizures that alter the severity, distribution, and type of neuropathology. We developed a neonatal piglet survival model of hypoxic-ischemic (HI) encephalopathy and hypothermia (HT) with continuous electroencephalography (cEEG) for seizures. Neonatal male piglets received HI-normothermia (NT), HI-HT, sham-NT, or sham-HT treatments. Randomized unmedicated sham and HI piglets underwent cEEG during recovery. Survival was 2–7 days. Normal and pathological neurons were counted in different neocortical areas, identified by cytoarchitecture and connectomics, using hematoxylin and eosin staining and immunohistochemistry for RNA-binding FOX-1 homolog 3 (Rbfox3/NeuN). Seizure burden was determined. HI-NT piglets had a reduced normal/total neuron ratio and increased ischemic-necrotic/total neuron ratio relative to sham-NT and sham-HT piglets with differing severities in the anterior and posterior motor, somatosensory, and frontal cortices. Neocortical neuropathology was attenuated by HT. HT protection was prominent in layer III of the inferior parietal cortex. Rbfox3 immunoreactivity distinguished cortical neurons as: Rbfox3-positive/normal, Rbfox3-positive/ischemic-necrotic, and Rbfox3-depleted. HI piglets had an increased Rbfox3-depleted/total neuron ratio in layers II and III compared to sham-NT piglets. Neuronal Rbfox3 depletion was partly rescued by HT. Seizure burdens in HI-NT and HI-HT piglets were similar. We conclude that the neonatal HI piglet neocortex has: (1) suprasylvian vulnerability to HI and seizures; (2) a limited neuronal cytopathological repertoire in functionally different regions that engages protective mechanisms with HT; (3) higher seizure burden, insensitive to HT, that is correlated with more panlaminar ischemic-necrotic neurons in the somatosensory cortex; and (4) pathological RNA splicing protein nuclear depletion that is sensitive to HT. This work demonstrates that HT protection of the neocortex in neonatal HI is topographic and laminar, seizure unmitigating, and restores neuronal depletion of RNA splicing factor. [ABSTRACT FROM AUTHOR]
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- 2023
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46. Predicting Peri-Operative Outcomes in Patients Treated with Percutaneous Thermal Ablation for Small Renal Masses: The SuNS Nephrometry Score.
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Musi, Gennaro, Luzzago, Stefano, Mauri, Giovanni, Mistretta, Francesco Alessandro, Varano, Gianluca Maria, Vaccaro, Chiara, Guzzo, Sonia, Maiettini, Daniele, Di Trapani, Ettore, Della Vigna, Paolo, Bianchi, Roberto, Bonomo, Guido, Ferro, Matteo, Tian, Zhe, Karakiewicz, Pierre I., de Cobelli, Ottavio, Orsi, Franco, and Piccinelli, Mattia Luca
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GLOMERULAR filtration rate ,REGRESSION analysis ,LOGISTIC regression analysis ,SURFACE area - Abstract
Our objective was to develop a new, simple, and ablation-specific nephrometry score to predict peri-operative outcomes and to compare its predictive accuracy to PADUA and RENAL scores. Overall, 418 patients were treated with percutaneous thermal ablation (microwave and radiofrequency) between 2008 and 2021. The outcome of interest was trifecta status (achieved vs. not achieved): incomplete ablation or Clavien–Dindo ≥ 3 complications or postoperative estimated glomerular filtration rate decrease ≥ 30%. First, we validated the discrimination ability of the PADUA and RENAL scoring systems. Second, we created and internally validated a novel scoring (SuNS) system, according to multivariable logistic regression models. The predictive accuracy of the model was tested in terms of discrimination and calibration. Overall, 89 (21%) patients did not achieve trifecta. PADUA and RENAL scores showed poor ability to predict trifecta status (c-indexes 0.60 [0.53–0.67] and 0.62 [0.55–0.69], respectively). We, therefore, developed the SuNS model (c-index: 0.74 [0.67–0.79]) based on: (1) contact surface area; (2) nearness to renal sinus or urinary collecting system; (3) tumour diameter. Three complexity classes were created: low (3–4 points; 11% of no trifecta) vs. moderate (5–6 points; 30% of no trifecta) vs. high (7–8 points; 65% of no trifecta) complexity. Limitations include the retrospective and single-institution nature of the study. In conclusion, we developed an immediate, simple, and reproducible ablation-specific nephrometry score (SuNS) that outperformed PADUA and RENAL nephrometry scores in predicting peri-operative outcomes. External validation is required before daily practice implementation. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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47. Modern Kidney-Sparing Management of Upper Tract Urothelial Carcinoma.
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Ghoreifi, Alireza, Sari Motlagh, Reza, and Fuchs, Gerhard
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PREVENTIVE medicine ,URINARY organ surgery ,KIDNEY physiology ,ONCOLOGIC surgery ,MITOMYCINS ,NEPHRECTOMY ,URETHRA surgery ,MINIMALLY invasive procedures ,DISEASE management ,ABLATION techniques ,URETEROSCOPY - Abstract
Simple Summary: Upper tract urothelial carcinoma (UTUC) is a lethal cancer of the urinary tract. Radical nephroureterectomy with bladder cuff excision is the gold standard for the management of patients with UTUC. Nevertheless, less-invasive surgeries to preserve maximum kidney function, such as endoscopic ablation and segmental ureteral resection, have become the preferred options in select patients. In this paper, we reviewed the latest evidence on the kidney-sparing management of upper tract urothelial carcinoma. We showed that these approaches are acceptable for low- as well as select high-risk patients who are not eligible for radical treatments. The main advantages of such approaches include renal function preservation as well as decreased surgical morbidity associated with radical treatments. Purpose: To review the latest evidence on the modern techniques and outcomes of kidney-sparing surgeries (KSS) in patients with upper tract urothelial carcinoma (UTUC). Methods: A comprehensive literature search on the study topic was conducted before 30 April 2023 using electronic databases including PubMed, MEDLINE, and EMBASE. A narrative overview of the literature was then provided based on the extracted data and a qualitative synthesis of the findings. Results: KSS is recommended for low- as well as select high-risk UTUCs who are not eligible for radical treatments. Endoscopic ablation is a KSS option that is associated with similar oncological outcomes compared with radical treatments while preserving renal function in well-selected patients. The other option in this setting is distal ureterectomy, which has the advantage of providing a definitive pathological stage and grade. Data from retrospective studies support the superiority of this approach over radical treatment with similar oncological outcomes, albeit in select cases. Novel chemoablation agents have also been studied in the past few years, of which mitomycin gel has received FDA approval for use in low-risk UTUCs. Conclusion: KSSs are acceptable approaches for patients with low- and select high-risk UTUCs, which preserve renal function without compromising the oncological outcomes. [ABSTRACT FROM AUTHOR]
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- 2023
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48. Spice-Derived Phenolic Compounds: Potential for Skin Cancer Prevention and Therapy.
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Baloghová, Janette, Michalková, Radka, Baranová, Zuzana, Mojžišová, Gabriela, Fedáková, Zuzana, and Mojžiš, Ján
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SKIN cancer ,PHENOLS ,PHYTOCHEMICALS ,CANCER prevention ,BASAL cell carcinoma ,CANCER treatment - Abstract
Skin cancer is a condition characterized by the abnormal growth of skin cells, primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Different types of skin cancer include melanoma, basal cell carcinoma, and squamous cell carcinoma. Despite the advancements in targeted therapies, there is still a need for a safer, highly efficient approach to preventing and treating cutaneous malignancies. Spices have a rich history dating back thousands of years and are renowned for their ability to enhance the flavor, taste, and color of food. Derived from various plant parts like seeds, fruits, bark, roots, or flowers, spices are important culinary ingredients. However, their value extends beyond the culinary realm. Some spices contain bioactive compounds, including phenolic compounds, which are known for their significant biological effects. These compounds have attracted attention in scientific research due to their potential health benefits, including their possible role in disease prevention and treatment, such as cancer. This review focuses on examining the potential of spice-derived phenolic compounds as preventive or therapeutic agents for managing skin cancers. By compiling and analyzing the available knowledge, this review aims to provide insights that can guide future research in identifying new anticancer phytochemicals and uncovering additional mechanisms for combating skin cancer. [ABSTRACT FROM AUTHOR]
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- 2023
- Full Text
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49. Emergence of Lipid Droplets in the Mechanisms of Carcinogenesis and Therapeutic Responses.
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Delmas, Dominique, Cotte, Alexia K., Connat, Jean-Louis, Hermetet, François, Bouyer, Florence, and Aires, Virginie
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LIPID metabolism ,THERAPEUTIC use of antineoplastic agents ,LECITHIN metabolism ,DISEASE progression ,HOMEOSTASIS ,PHYSIOLOGICAL stress ,ENDOPLASMIC reticulum ,INFLAMMATION ,NEOPLASTIC cell transformation ,ORGANELLES ,METABOLISM ,CELL physiology ,CELL survival ,GENE expression ,TUMOR markers ,TUMORS ,DRUG resistance in cancer cells ,HYPOXEMIA - Abstract
Simple Summary: Cancer cells are characterized by an increased energy metabolism, to cope with a high rate of proliferation. Recently, alterations in lipid metabolism have been recognized to be involved in tumor progression. Lipid droplets represent dynamic entities implied in such a phenomenon. This review aims to point out the metabolic pathways that are presumed to be engaged in cancer cell survival and growth in order to define potential biomarkers of tumor progression and new therapeutic strategies in the treatment of cancer. Cancer shares common risk factors with cardiovascular diseases such as dyslipidemia, obesity and inflammation. In both cases, dysregulations of lipid metabolism occur, and lipid vesicles emerge as important factors that can influence carcinogenesis. In this review, the role of different lipids known to be involved in cancer and its response to treatments is detailed. In particular, lipid droplets (LDs), initially described for their role in lipid storage, exert multiple functions, from the physiological prevention of LD coalescence and regulation of endoplasmic reticulum homeostasis to pathological involvement in tumor progression and aggressiveness. Analysis of LDs highlights the importance of phosphatidylcholine metabolism and the diversity of lipid synthesis enzymes. In many cancers, the phosphatidylcholine pathways are disrupted, modifying the expression of genes coding for metabolic enzymes. Tumor microenvironment conditions, such as hypoxia, different types of stress or inflammatory conditions, are also important determinants of LD behavior in cancer cells. Therefore, LDs represent therapeutic targets in cancer, and many lipid mediators have emerged as potential biomarkers for cancer onset, progression, and/or resistance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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50. Tools for Etiologic Diagnosis of Drug-Induced Allergic Conditions.
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Rodríguez-Pérez, Rosa, de las Vecillas, Leticia, Cabañas, Rosario, and Bellón, Teresa
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ALLERGIES ,DRUG allergy ,DRUG side effects ,DIAGNOSIS ,MEDICAL protocols - Abstract
Drug hypersensitivity reactions are a serious concern in clinical practice because they can be severe and result in lifelong sequelae. An accurate diagnosis and identification of the culprit drug is essential to prevent future reactions as well as for the identification of safe treatment alternatives. Nonetheless, the diagnosis can be challenging. In vivo and in vitro tests can be helpful, although none are conclusive; therefore, the tests are not usually performed in isolation but as part of a diagnostic algorithm. In addition, some in vitro tests are only available in research laboratories, and standardization has not been fully accomplished. Collaborating research is needed to improve drug hypersensitivity reaction diagnosis. In this review, we update the current available in vivo and in vitro tools with their pros and cons and propose an algorithm to integrate them into clinical practice. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
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