71 results on '"Luo LX"'
Search Results
2. Stability and Structure of Spiral Galaxies with FiniteThickness.
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Lin LY Yi-Hui, Peng PQ Qiu-He, Chou CC Chih-Kang, and Luo LX Xin-Lian
- Published
- 2005
3. CDKN1A promotes Cis-induced AKI by inducing cytoplasmic ROS production and ferroptosis.
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Gao Q, Chen JM, Li CS, Zhan JY, Yin XD, Li BS, Dong HL, Luo LX, and Li ZL
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- Humans, Animals, Rats, Cell Line, Male, Tumor Suppressor Protein p53 metabolism, Tumor Suppressor Protein p53 genetics, Rats, Sprague-Dawley, Oxidative Stress drug effects, Ferroptosis drug effects, Acute Kidney Injury chemically induced, Acute Kidney Injury metabolism, Acute Kidney Injury genetics, Cisplatin toxicity, Cyclin-Dependent Kinase Inhibitor p21 genetics, Cyclin-Dependent Kinase Inhibitor p21 metabolism, Reactive Oxygen Species metabolism
- Abstract
Background and Objective: This study focuses on investigating the role of CDKN1A in cisplatin-induced AKI (acute kidney injury, AKI) and its potential as a biomarker for early diagnosis and therapeutic intervention by integrating bioinformatics analysis, machine learning, and experimental validation., Methods: We analyzed the GSE85957 dataset to find genes that changed between control and cisplatin-treated rats. Using bioinformatics and machine learning, we found 13 important genes related to ferroptosis and the P53 pathway. The key gene, CDKN1A, was identified using various algorithms. We then tested how reducing CDKN1A in human kidney cells affected cell health, ROS, and iron levels. We also checked how CDKN1A changes the levels of proteins linked to ferroptosis using Q-PCR and Western Blot., Results: CDKN1A was found to negatively regulate the G1/S phase transition and was associated with ferroptosis in p53 signaling. Experiments in human renal tubular epithelial cells (HK-2) and rat NRK-52E cells showed that CDKN1A knockdown mitigated cisplatin-induced cell injury by reducing oxidative stress and ferroptosis., Conclusion: Our integrated approach identified CDKN1A as a biomarker for cisplatin-induced AKI. Its regulation could be key in AKI pathogenesis, offering new therapeutic insights and aiding in early diagnosis and intervention., Competing Interests: Declaration of competing interest We declare that we have no financial and personal relationships with other people of organizations that can inappropriately influence our work., (Copyright © 2024 Elsevier Ltd. All rights reserved.)
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- 2024
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4. [Correlation between Bone Marrow Microvascular Density, Angiogenesis Factors and Bortezomib Resistance in Multiple Myeloma].
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Luo LX, Yao JJ, and Cai YF
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- Humans, Retrospective Studies, Vascular Endothelial Growth Factor A metabolism, Risk Factors, Male, Female, Hepatocyte Growth Factor, Multiple Myeloma drug therapy, Bortezomib pharmacology, Bone Marrow, Drug Resistance, Neoplasm, Microvascular Density
- Abstract
Objective: To investigate the correlation between bone marrow microvascular density, angiogenesis factors and bortezomib resistance in multiple myeloma (MM)., Methods: The data of 200 patients with MM treated in our hospital from January 2020 to August 2023 were retrospectively analyzed, and the patients with MM were divided into drug-resistant group( n =68) and non-drug-resistant group( n =132) according to their drug resistance during bortezomib treatment. The univariate and multivariate logistic analysis were used to screen the independent influencing factors of bortezomib resistance in MM patients during treatment. The receiver operating characteristic (ROC) curve and clinical decision curve (DCA) were used to evaluate the predictive performance and clinical application value of the risk prediction model, the consistency between the actual incidence rate and the predicted incidence rate was judged by validating the calibration chart, and the goodness-of-fit of the model was judged by H-L test., Results: 68 of the 200 MM patients developed resistance and poor clinical efficacy during bortezomib treatment, and the clinical resistance rate of bortezomib was 34.0%. The results of multivariate analysis showed that high bone marrow microvessel density (MVD) and high bone marrow supernatant VEGF, HGF, and bFGF expression levels were independent risk factors for bortezomib resistance in MM patients ( P < 0.05). The area under the ROC curve (AUC) of the model jointly constructed by bone marrow MVD, serum VEGF, HGF, bFGF and TNF-α levels was 0.924, and its sensitivity and specificity were 92.6% and 78.8%, which were higher than those of the bone marrow MVD model (AUC=0.743) and the vasogenesis factor model (AUC=0.878). The calibration curve of the joint prediction model was close to the standard curve, indicating that the model is more consistent. The results of H-L goodness -of - fit test showed χ
2 =14.748, P =0.164, the joint prediction model had a good fit. The DCA curve showed that the clinical net benefit of intervention in the range of 0.0~1.0 was greater than that of full intervention and no intervention., Conclusion: The prediction model based on bone marrow MVD and vasogenesis factors (VEGF, HGF, bFGF) in MM patients has higher clinical evaluation performance and predictive value.- Published
- 2024
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5. Enhancement of Apple Stress Resistance via Proline Elevation by Sugar Substitutes.
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Feng ZQ, Li T, Li XY, Luo LX, Li Z, Liu CL, Ge SF, Zhu ZL, Li YY, Jiang H, and Jiang YM
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- Fruit metabolism, Gene Expression Regulation, Plant, Malus metabolism, Malus physiology, Proline metabolism, Sugars metabolism, Stress, Physiological
- Abstract
Plants encounter numerous adversities during growth, necessitating the identification of common stress activators to bolster their resistance. However, the current understanding of these activators' mechanisms remains limited. This study identified three anti-stress activators applicable to apple trees, all of which elevate plant proline content to enhance resistance against various adversities. The results showed that the application of these sugar substitutes increased apple proline content by two to three times compared to the untreated group. Even at a lower concentration, these activators triggered plant stress resistance without compromising apple fruit quality. Therefore, these three sugar substitutes can be exogenously sprayed on apple trees to augment proline content and fortify stress resistance. Given their effectiveness and low production cost, these activators possess significant application value. Since they have been widely used in the food industry, they hold potential for broader application in plants, fostering apple industry development.
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- 2024
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6. Six transmembrane epithelial antigens of the prostate to illustrate inflammatory response in gastrointestinal cancers.
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Wu YH and Luo LX
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Gastrointestinal cancer (GIC) is a common and widespread form of tumor, with colonoscopy and upper gastrointestinal endoscopy available to detect relevant precancerous polyps and lesions. However, many patients are already in the late stages when first diagnosed with such cancer, resulting in a poor prognosis. Thus, it is necessary to explore new methods and research directions in order to improve the treatment of GIC. Given the specific nature of the gastrointestinal tract, research should focus on the mechanisms of various inflammations and the interactions between food entering and exiting from the gastrointestinal tract and cancer cells. Interestingly, six transmembrane epithelial antigens of the prostates (STEAPs) have been found to be significantly linked to the progression of malignant tumors, associated with intracellular oxidative stress and playing a major role in inflammation with their structure and function. This paper explores the mechanism of STEAPs in the inflammatory response of GIC, providing a theoretical basis for the prevention and early intervention of GIC. The basic properties of the STEAP family as metal reductase are also explained. When it comes to intervention for GIC prevention, STEAPs can affect the activity of Fe
3+ , Cu2+ reductase and regulate metal ion uptake in vivo , participating in inflammation-related iron and copper homeostasis. Thus, the mechanism of STEAPs on inflammation is of important value in the prevention of GIC., Competing Interests: Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)- Published
- 2024
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7. An overview of the contemporary diagnosis and management approaches for anaplastic thyroid carcinoma.
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Zhou SY and Luo LX
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Thyroid carcinoma is a complex disease with several types, the most common being well-differentiated and undifferentiated. The latter, "undifferentiated carcinoma", also known as anaplastic thyroid carcinoma (ATC), is a highly aggressive malignant tumor accounting for less than 0.2% of all thyroid carcinomas and carries a poor prognosis with a median survival of 5 months. BRAF gene mutations are the most common molecular factor associated with this type of thyroid carcinoma. Recent advances in targeted biological agents, immunotherapy, stem cell therapy, nanotechnology, the dabrafenib/trametinib combination therapy, immune checkpoint inhibitors (ICI) and artificial intelligence offer novel treatment options. The combination therapy of dabrafenib and trametinib is the current standard treatment for patients with BRAF-V600E gene mutations. Besides, the dabrafenib/trametinib combination therapy, ICI, used alone or in combination with targeted therapies have raised some hopes for improving the prognosis of this deadly disease. Younger age, earlier tumor stage and radiotherapy are all prognostic factors for improved outcomes. Ultimately, therapeutic regimens should be tailored to the individual patient based on surveillance and epidemiological data, and a multidisciplinary approach is essential., Competing Interests: Conflict-of-interest statement: All the authors report no relevant conflicts of interest in this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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8. New targets for cancer promotion and therapy in gliomas: Scinderin.
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Wang X and Luo LX
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Glioma is one of the most common primary intracranial tumors, characterized by invasive growth and poor prognosis. Actin cytoskeletal rearrangement is an essential event in tumor cell migration. Scinderin (SCIN), an actin severing and capping protein that regulates the actin cytoskeleton, is involved in the proliferation and migration of certain cancer cells. However, its biological role and molecular mechanism in glioma remain unclear. Lin et al explored the role and mechanism of SCIN in gliomas. The results showed that SCIN mechanically affected cytoskeleton remodeling and inhibited the formation of lamellipodia via RhoA/FAK signaling pathway. This study identifies the cancer-promoting role of SCIN and provides a potential therapeutic target for SCIN in glioma treatment., Competing Interests: Conflict-of-interest statement: The author reports no relevant conflicts of interest for this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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9. Feasibility and limitations of combined treatment for lateral pelvic lymph node metastases in rectal cancer.
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Zheng YZ, Yan FF, and Luo LX
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Colorectal cancer ranks among the most commonly diagnosed cancers globally, and is associated with a high rate of pelvic recurrence after surgery. In efforts to mitigate recurrence, pelvic lymph node dissection (PLND) is commonly advocated as an adjunct to radical surgery. Neoadjuvant chemoradiotherapy (NACRT) is a therapeutic approach employed in managing locally advanced rectal cancer, and has been found to increase the survival rates. Chua et al have proposed a combination of NACRT with selective PLND for addressing lateral pelvic lymph node metastases in rectal cancer patients, with the aim of reducing recurrence and improving survival outcomes. Nevertheless, certain studies have indicated that the addition of PLND to NACRT and total mesorectal excision did not yield a significant reduction in local recurrence rates or improvement in survival. Consequently, meticulous patient selection and perioperative chemotherapy may prove indispensable in ensuring the efficacy of PLND., Competing Interests: Conflict-of-interest statement: All authors declare no conflicts of interest for this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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10. HPPO-Derived Meroterpenoids from the Marine-Derived Fungus Penicillium sp. SCSIO 41691.
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Tang YQ, Liang X, Zou QH, Cui H, Luo LX, and Qi SH
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- Molecular Structure, Animals, Mice, RAW 264.7 Cells, Nitric Oxide biosynthesis, Crystallography, X-Ray, Marine Biology, Lipopolysaccharides pharmacology, Penicillium chemistry, Terpenes pharmacology, Terpenes chemistry, Terpenes isolation & purification
- Abstract
Seven new 4-hydroxy-6-phenyl-2 H -pyran-2-one (HPPO) derived meroterpenoids, 1-methyl-12a,12b-epoxyarisugacin M ( 1 ), 1-methyl-4a,12b-epoxyarisugacin M ( 2 ), 2,3-dihydroxy-3,4a-epoxy-12a-dehydroxyisoterreulactone A ( 3 ), 2-hydroxy-12a-dehydroxyisoterreulactone A ( 4 ), 3'-demethoxyterritrems B' ( 5 ), 4a-hydroxyarisugacin P ( 6 ), and 1-epi-arisugacin H ( 7 ), together with two known analogues ( 8 and 9 ), were isolated from the marine-derived fungal strain Penicillium sp. SCSIO 41691. Their structures were elucidated by spectroscopic methods, and the absolute configurations of compounds 1 and 3 were determined by single-crystal X-ray diffraction. Among them, 1 and 2 had a unique methyl migration in the basic meroterpenoid skeleton with a 12a,12b-epoxy or 4a,12b-epoxy group, and 3 was a highly oxygenated HPPO-derived meroterpenoid featuring a rare 6/5/6/6/6/6 hexacyclic system with a 3,4a-epoxy group. Biologically, 5 exhibited inhibitory activity against lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells with an IC
50 value of 21 μM, more potent than the positive control indomethacin.- Published
- 2024
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11. Mechanisms and potential applications of COPS6 in pan-cancer therapy.
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Wu T, Ji MR, and Luo LX
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The COP9 signalosome subunit 6 (COPS6) is abnormally overexpressed in many malignancies, yet its precise role in carcinogenesis is unknown. To gain a better understanding of COPS6's role, the authors conducted a pan-cancer analysis using various bioinformatics techniques such as differential expression patterns, prognostic value, gene mutations, immune infiltration, correlation analysis, and functional enrichment assessment. Results showed that COPS6 was highly correlated with prognosis, immune cell infiltration level, tumor mutation burden, and microsatellite instability in patients with a range of tumor types. This suggests that COPS6 may be a potential target for cancer treatment. Overall, this research provides insight into COPS6's role in cancer development and its potential therapeutic applications., Competing Interests: Conflict-of-interest statement: All authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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12. Role of targeting ferroptosis as a component of combination therapy in combating drug resistance in colorectal cancer.
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Xie XT, Pang QH, and Luo LX
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Colorectal cancer (CRC) is a form of cancer that is often resistant to chemotherapy, targeted therapy, radiotherapy, and immunotherapy due to its genomic instability and inflammatory tumor microenvironment. Ferroptosis, a type of non-apoptotic cell death, is characterized by the accumulation of iron and the oxidation of lipids. Studies have revealed that the levels of reactive oxygen species and glutathione in CRC cells are significantly lower than those in healthy colon cells. Erastin has emerged as a promising candidate for CRC treatment by diminishing stemness and chemoresistance. Moreover, the gut, responsible for regulating iron absorption and release, could influence CRC susceptibility through iron metabolism modulation. Investigation into ferroptosis offers new insights into CRC pathogenesis and clinical management, potentially revolutionizing treatment approaches for therapy-resistant cancers., Competing Interests: Conflict-of-interest statement: All authors declare no conflicts of interest for this article., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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13. TM9SF1 is implicated in promoting the proliferation and invasion of bladder cancer cells.
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Zhou SQ and Luo LX
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Zhuo et al looked into the part of transmembrane 9 superfamily member 1 (TM9SF1) in bladder cancer (BC), and evaluated if it can be used as a therapeutic target. They created a permanent BC cell line and tested the effects of TM9SF1 overexpression and suppression on BC cell growth, movement, invasion, and cell cycle advancement. Their results show that TM9SF1 can boost the growth, movement, and invasion of BC cells and their access into the G2/M stage of the cell cycle. This research gives a novel direction and concept for targeted therapy of BC., Competing Interests: Conflict-of-interest statement: All the authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (©The Author(s) 2024. Published by Baishideng Publishing Group Inc. All rights reserved.)
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- 2024
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14. Transcranial alternating current stimulation for schizophrenia: a systematic review of randomized controlled studies.
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Wei X, Shi ZM, Lan XJ, Qin ZJ, Mo Y, Wu HW, Huang XB, Zeng QB, Luo LX, Yang XH, and Zheng W
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Background: In randomized clinical trials (RCTs) investigating the application of transcranial alternating current stimulation (tACS) in schizophrenia, inconsistent results have been reported. The purpose of this exploratory systematic review of RCTs was to evaluate tACS as an adjunct treatment for patients with schizophrenia based on its therapeutic effects, tolerability, and safety., Methods: Our analysis included RCTs that evaluated adjunctive tACS' effectiveness, tolerability, and safety in schizophrenia patients. Three independent authors extracted data and synthesized it using RevMan 5.3 software., Results: Three RCTs involving 76 patients with schizophrenia were encompassed in the analysis, with 40 participants receiving active tACS and 36 receiving sham tACS. Our study revealed a significant superiority of active tACS over sham tACS in improving total psychopathology (standardized mean difference [SMD] = -0.61, 95% confidence interval [CI]: -1.12, -0.10; I
2 = 16%, p = 0.02) and negative psychopathology (SMD = -0.65, 95% CI: -1.11, -0.18; I2 = 0%, p = 0.007) in schizophrenia. The two groups, however, showed no significant differences in positive psychopathology, general psychopathology, or auditory hallucinations (all p > 0.05). Two RCTs examined the neurocognitive effects of tACS, yielding varied findings. Both groups demonstrated similar rates of discontinuation due to any reason and adverse events (all p > 0.05)., Conclusion: Adjunctive tACS is promising as a viable approach for mitigating total and negative psychopathology in individuals diagnosed with schizophrenia. However, to gain a more comprehensive understanding of tACS's therapeutic effects in schizophrenia, it is imperative to conduct extensive, meticulously planned, and well-documented RCTs., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Wei, Shi, Lan, Qin, Mo, Wu, Huang, Zeng, Luo, Yang and Zheng.)- Published
- 2024
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15. Fucoxanthin Prevents Lipopolysaccharide-Induced Acute Lung Injury by Inhibiting Ferroptosis via Nrf2/STAT3 and Glutathione Pathways.
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Ding R, Zhong SY, Deng LY, and Luo LX
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- Animals, Mice, RAW 264.7 Cells, Male, Anti-Inflammatory Agents, Signal Transduction drug effects, Mice, Inbred C57BL, Amino Acid Transport System y+, Acute Lung Injury metabolism, Acute Lung Injury chemically induced, Acute Lung Injury prevention & control, Acute Lung Injury drug therapy, Lipopolysaccharides adverse effects, Xanthophylls pharmacology, NF-E2-Related Factor 2 metabolism, STAT3 Transcription Factor metabolism, Ferroptosis drug effects, Glutathione metabolism, Disease Models, Animal
- Abstract
Fucoxanthin, sourced from marine brown algae, diatoms, and microalgae, is known to possess strong anti-inflammatory activity. To explore its intrinsic mechanism, we investigated its effects on acute lung injury (ALI) with an experiment using lipopolysaccharide (LPS)-induced RAW264.7 inflammatory cells and an ALI animal model. Fucoxanthin was observed to suppress the inflammatory response in vitro by reducing the levels of inflammatory markers such as PTGS2, iNOS, and TNF-α. Network pharmacology analysis revealed that fucoxanthin could potentially inhibit ferroptosis through 10 targets, including PTGS2. This was further confirmed by the dose-dependent increase in lipid peroxidation and Fe[Formula: see text] levels caused by fucoxanthin, as well as the regulation of ferroptosis-associated proteins ACSL4, SLC7A11, GPX4, and FTH1. Furthermore, fucoxanthin was found to significantly reduce the inflammatory response and ferroptosis in a mouse model of LPS-induced ALI. Further research revealed that fucoxanthin could raise the levels of [Formula: see text]-Glu-Cys and carbamyl glycine, which are intermediate metabolites of glutathione synthesis, in RAW264.7 cells. This implies that fucoxanthin can inhibit ferroptosis by regulating the [Formula: see text]-glutamyl cycle. Our research demonstrated that fucoxanthin is capable of activating phosphorylated STAT3 and raising the expression of Nrf2 and HO-1, implying that fucoxanthin may be able to prevent LPS-induced ferroptosis in ALI through the Nrf2/STAT3 pathway.
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- 2024
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16. Therapeutic Potential of Kaempferol against Sleep Deprivation-Induced Cognitive Impairment: Modulation of Neuroinflammation and Synaptic Plasticity Disruption in Mice.
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Du YY, Sun T, Yang Q, Liu QQ, Li JM, Yang L, and Luo LX
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Sleep deprivation (SD) has led to a rise in cognitive impairment (CI) cases. Kaempferol (KMP), known for its anti-inflammatory and antiapoptotic properties, holds promise in countering SD-induced CI. Experimental validation using a sleep-deprived CI model confirmed KMP's efficacy in mitigating CI. Immunofluorescence investigations emphasized diminished activation of astrocytes and reduced the proliferation of microglia in the hippocampus of mice subjected to SD. Subsequently, network pharmacological analyses were conducted and found that KMP may be closely related to the mitogen-activated protein kinase (MAPK) pathway in SD-induced CI. The influence of KMP on the MAPK pathway was verified by the observed decrease in the expression of phosphorylated JNK (p-JNK) and p38 (p-p38). Analyzing hippocampal AMPARS and NMDARS expression indicated KMP's ability to enhance GluA1 phosphorylation (Ser831 and Ser845) and GluN2A levels. Patch clamp assays demonstrated heightened excitatory transmitter transmission in the hippocampus, suggesting KMP's positive influence. Overall, KMP combats neuroinflammation via MAPK inhibition, augments synaptic function, and addresses learning and memory dysfunction in sleep-deprived mice., Competing Interests: The authors declare no competing financial interest., (© 2023 American Chemical Society.)
- Published
- 2023
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17. Lecanicilliums A-F, Thiodiketopiperazine-Class Alkaloids from a Mangrove Sediment-Derived Fungus Lecanicillium kalimantanense .
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Zhong LF, Ling J, Luo LX, Yang CN, Liang X, and Qi SH
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- Humans, Anti-Bacterial Agents chemistry, Cell Line, Molecular Structure, Hypocreales, Alkaloids pharmacology
- Abstract
Six new thiodiketopiperazine-class alkaloids lecanicilliums A-F were isolated from the mangrove sediment-derived fungus Lecanicillium kalimantanense SCSIO41702, together with thirteen known analogues. Their structures were determined by spectroscopic analysis. The absolute configurations were determined by quantum chemical calculations. Electronic circular dichroism (ECD) spectra and the structure of Lecanicillium C were further confirmed by a single-crystal X-ray diffraction analysis. Lecanicillium A contained an unprecedented 6/5/6/5/7/6 cyclic system with a spirocyclic center at C-2'. Biologically, lecanicillium E, emethacin B, and versicolor A displayed significant cytotoxicity against human lung adenocarcinoma cell line H1975, with IC
50 values of 7.2~16.9 μM, and lecanicillium E also showed antibacterial activity against four pathogens with MIC values of 10~40 μg/mL. Their structure-activity relationship is also discussed.- Published
- 2023
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18. Hotspots and frontiers of genetic research on pediatric cataracts from 2013 to 2022: a scientometric analysis.
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Tan Y, Jiang W, Hu LY, Shen YY, Chen H, Zou YS, Luo LX, Jin GM, and Liu ZZ
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Aim: To explore the hotspots and frontiers of genetic research on pediatric cataracts., Methods: Global publications from 2013 to 2022 related to genes in pediatric cataracts were extracted from the Web of Science Core Collection, and were analyzed in terms of the publication counts, countries, journals, authors, keywords, cited references, subject categories, and the underlying hotspots and frontiers., Results: Totally 699 publications were included in the final analysis. The predominant actors were identified, with China ( n =240) and PLoS One ( n =33) being the most productive country and journal respectively. The research hotspots extracted from keywords were crystallin gene mutations, pathogenicity evaluation, phenotypes of ocular and neurodevelopmental abnormalities, genes encoding membrane proteins, and diagnosis of multisystemic disorders. The co-cited articles formed 10 clusters of research topics, including FYCO1 (56 items), mutation screening (43 items), gap junction (29 items), the Warburg Micro syndrome (29 items), ephrin-A5 (28 items), novel mutation (24 items), eye development and function (22 items), cholestanol (7 items), OCRL (6 items), and pathogenicity prediction (3 items). The research frontiers were FYCO1 , ephrin-A5, and cholestanol. Cell biology showed the strongest bridging effects among different disciplines in the field (betweenness centrality=0.44)., Conclusion: With the progress in next-generation sequencing and multidisciplinary collaboration, genetic research on pediatric cataracts broadens the knowledge scope of the crystalline lens, as well as other organs and systems, shedding light on the molecular mechanisms of systemic diseases. Cell biology may integrate multidisciplinary content to address cutting-edge issues in the field., (International Journal of Ophthalmology Press.)
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- 2023
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19. Identification of CCDC115 as an adverse prognostic biomarker in liver cancer based on bioinformatics and experimental analyses.
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Su C, Yang JC, Rong Z, Li F, Luo LX, Liu G, Cheng CY, Zhao MG, and Yang L
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Liver hepatocellular carcinoma (LIHC) is a major malignant tumor of the digestive system with a high incidence rate and poor early diagnosis. Coiled-coil domain-containing protein 115 (CCDC115), an accessory component of vacuolar-ATPase with dramatically abnormal expression, is associated with survival outcomes of cancer patients. However, the role of CCDC115 in LIHC remains unclear. In this study, we aimed to determine the functional role of CCDC115 in LIHC by examining CCDC115 expression, and its influence on LIHC prognosis. Through extensive statistical analyses, using LIHC patient databases, we observed that CCDC115 expression significantly increased in tumor tissues of LIHC patients. In addition, CCDC115 expression correlated with the poor prognosis. Additionally, CCDC115 was found to be involved in several cancer-related pathways, specifically the PI3K-Akt pathway. The expression of CCDC115 was positively correlated with human leukocyte antigen molecules as well as with immune checkpoint molecules in LIHC patients. We performed in vitro experiments and confirmed that the expression of CCDC115 significantly affects the proliferation potential, metastasis and sorafenib resistance of liver cancer cells, as well as some key protein expression in PI3K-Akt pathway. These results indicate that CCDC115 could serve as a diagnostic and prognostic biomarker of LIHC, and targeting CCDC115 may provide a potential strategy to enhance the efficacy of liver cancer therapy., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 The Authors.)
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- 2023
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20. Determining the potent immunostimulation potential arising from the heteropolysaccharide structure of a novel fucoidan, derived from Sargassum Zhangii .
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Li R, Zhou QL, Yang RY, Chen ST, Ding R, Liu XF, Luo LX, Xia QY, Zhong SY, Qi Y, and Williams RJ
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A preliminary study was conducted of the chemical, structural properties and immunomodulatory activities of fucoidan isolated from Sargassum Zhangii (SZ). Sargassum Zhangii fucoidan (SZF) was determined to have a sulfate content of 19.74 ± 0.01% (w/w) and an average molecular weight of 111.28 kDa. SZF possessed a backbone structure of (1,4)-α-d-linked-galactose, (3,4)-α-l-fucose, (1,3)-α-d-linked-xylose, β-d-linked-mannose and a terminal (1,4)-α-d-linked-glucose. The main monosaccharide composition was determined as (w/w) 36.10% galactose, 20.13% fucose, 8.86% xylose, 7.36% glucose, 5.62% mannose, and 18.07% uronic acids, respectively. An immunostimulatory assay showed that SZF, compared to commercial fucoidans ( Undaria pitnnaifida and Fucus vesiculosus sources), significantly elevated nitric oxide production via up-regulation of cyclooxygenase-2 and inducible nitric oxide synthase at both gene and protein levels. These results suggest that SZ has the potential to be a source of fucoidan with enhanced properties that may act as a useful ingredient for functional foods, nutritional supplements, and immune enhancers., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 The Author(s).)
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- 2023
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21. 'On Water'-Promoted Three-Component Tandem Michael Addition/D-A Cycloaddition Reaction to Construct Polycyclic N-Heterocycles Derivatives.
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Dong Y, Luo LX, Hua C, He ZJ, Chen Y, Shi ZC, Li ZH, and He B
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- Cycloaddition Reaction, Catalysis, Water
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'On Water'-promoted the three-component tandem Michael addition/D-A cycloaddition reaction in 80 °C at 3 h has been developed without employing any catalyst and organic solvent. The process allows facile access to polycyclic N-heterocycles derivatives contain indole and maleimide from easily accessible starting materials in moderate to high yields (up to 91 %). Compared with conventional reaction conditions, this reaction not only improves the reaction efficiency and rate but also minimizes the side reaction., (© 2023 Wiley-VHCA AG, Zurich, Switzerland.)
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- 2023
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22. Effects of mindfulness decompression therapy on mental health and job burnout among nurses working in the frontline of the novel coronavirus pandemic: A retrospective study.
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Luo LX, Peng X, Hou J, Xie Y, Dong H, Peng S, Ma G, and Zhang J
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- Humans, Retrospective Studies, Pandemics, Mental Health, Burnout, Psychological, SARS-CoV-2, Decompression, COVID-19 therapy, Burnout, Professional epidemiology
- Abstract
Objectives: As the coronavirus disease 2019 (COVID-19) pandemic continues to spread worldwide, nucleic acid detection is a key step in controlling it. Psychological issues and job burnout of nurses working in nucleic acid sampling roles for long periods have become apparent. This study aimed to explore the effects of mindfulness decompression therapy on mental health and job burnout in front-line nurses working in nucleic acid sampling during the pandemic., Methods: Nucleic acid sampling frontline nurses who were positive for burnout on both the Symptom Checklist-90 (SCL-90) and the Maslach Burnout Inventory-General Scale (MBI-GS) were selected as the participants. Frontline nurses in the nucleic acid testing area who received routine psychological nursing intervention from June 2020 to April 2021 were used as the control group. Nurses who received both routine psychological nursing and mindfulness decompression therapy from May 2021 to December 2021 formed the "mindfulness" subject group. We compared the two groups' primary outcome measures of SCL-90 and MBI-GS scores., Results: Before the intervention, there were no significant differences between the two groups in general data, SCL-90 scores, and MBI-GS scores. After the mindfulness decompression therapy, according to SCL-90 and MBI-GS scales, psychological distress and job burnout of nurses in the mindfulness group were significantly better than those in the control group., Conclusion: Mindfulness decompression therapy can effectively improve mental health and relieve job burnout in frontline nurses in nucleic acid sampling areas, which is worthy of clinical application. Randomized controlled trials are still needed, however, to fully confirm the effects of mindfulness decompression therapy., (© 2023 The Authors. Journal of Occupational Health published by John Wiley & Sons Australia, Ltd on behalf of The Japan Society for Occupational Health.)
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- 2023
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23. Chemical Characterization and Immunomodulatory Activity of Fucoidan from Sargassum hemiphyllum .
- Author
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Li R, Zhou QL, Chen ST, Tai MR, Cai HY, Ding R, Liu XF, Chen JP, Luo LX, and Zhong SY
- Subjects
- Polysaccharides chemistry, Monosaccharides chemistry, Macrophages, Sargassum chemistry
- Abstract
Fucoidan is a sulfated algal polyanionic polysaccharide that possesses many biological activities. In this paper, a fucoidan (SHF) polysaccharide was extracted from Sargassum hemiphyllum collected in the South China Sea. The SHF, with a molecular weight of 1166.48 kDa (44.06%, w / w ), consisted of glucose (32.68%, w / w ), galactose (24.81%, w / w ), fucose (20.75%, w / w ), xylose (6.98%, w / w ), mannose (2.76%, w / w ), other neutral monosaccharides, and three uronic acids, including glucuronic acid (5.39%, w / w ), mannuronic acid (1.76%, w / w ), and guronuronic acid (1.76%, w / w ). The SHF exhibited excellent immunostimulatory activity. An immunostimulating assay showed that SHF could significantly increase NO secretion in macrophage RAW 264.7 cells via upregulation of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) levels based on both gene expression and protein abundance. These results suggest that SHF isolated from Sargassum hemiphyllum has great potential to act as a health-boosting ingredient in the pharmaceutical and functional-food fields.
- Published
- 2022
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24. [Impact of capsular tension ring implantation in cataract patients with high myopia].
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Lin HW, Tan XH, Zhang JQ, and Luo LX
- Subjects
- Humans, Lens Implantation, Intraocular, Lens Capsule, Crystalline, Phacoemulsification, Cataract complications, Cataract therapy, Lenses, Intraocular, Myopia
- Abstract
The capsular tension ring (CTR) can stabilize the capsule, support the lax zonules, and inhibit the proliferation and migration of lens epithelial cells. Clinically, CTR is mostly used in patients with zonular weakness, which can improve the stability of intraocular lens (IOL) and reduce the incidence of posterior capsular opacity (PCO). The relatively large capsular bag volume, zonular weakness in cataract patients with high myopia may increase the instability of IOL and PCO. Therefore, many clinicians have implanted CTR in cataract patients with high myopia. In this review, we summarized the application of CTR in cataract patients with high myopia.
- Published
- 2022
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25. Phospholipid peroxidation inhibits autophagy via stimulating the delipidation of oxidized LC3-PE.
- Author
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Li W, Luo LX, Zhou QQ, Gong HB, Fu YY, Yan CY, Li E, Sun J, Luo Z, Ding ZJ, Zhang QY, Mu HL, Cao YF, Ouyang SH, Kurihara H, Li YF, Sun WY, Li M, and He RR
- Abstract
Phospholipid peroxidation of polyunsaturated fatty acids at the bis-allylic position drives ferroptosis. Here we identify a novel role for phospholipid peroxidation in the inhibition of autophagy. Using in vitro and in vivo models, we report that phospholipid peroxidation induced by glutathione peroxidase-4 inhibition and arachidonate 15-lipoxygenase overexpression leads to overload of peroxidized phospholipids and culminate in inhibition of autophagy. Functional and lipidomics analysis further demonstrated that inhibition of autophagy was associated with an increase of peroxidized phosphatidylethanolamine (PE) conjugated LC3. We further demonstrate that autophagy inhibition occurred due to preferential cleavage of peroxidized LC3-PE by ATG4B to yield delipidated LC3. Mouse models of phospholipid peroxidation and autophagy additionally supported a role for peroxidized PE in autophagy inhibition. Our results agree with the recognized role of endoplasmic reticulum as the primary source for autophagosomal membranes. In summary, our studies demonstrated that phospholipid peroxidation inhibited autophagy via stimulating the ATG4B-mediated delipidation of peroxidized LC3-PE., (Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2022
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26. Pyrrospirones K-Q, Decahydrofluorene-Class Alkaloids from the Marine-Derived Fungus Penicillium sp. SCSIO 41512.
- Author
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Yao FH, Liang X, Lu XH, Cheng X, Luo LX, and Qi SH
- Subjects
- Anti-Bacterial Agents chemistry, Circular Dichroism, Fungi chemistry, Molecular Structure, Alkaloids chemistry, Penicillium chemistry
- Abstract
Seven new decahydrofluorene-class alkaloids, pyrrospirones K-Q ( 1 - 7 ), together with six known analogues ( 8 - 13 ) were isolated from the marine-derived fungal strain Penicillium sp. SCSIO 41512. Their structures were determined by extensive spectroscopic analysis, and their absolute configurations were established by single-crystal X-ray diffraction analysis and quantum chemical calculations of electronic circular dichroism spectra. Compounds 1 and 3 possess a novel decahydrofluorene-class alkaloid skeleton with a 6/5/6/8/5/6/13 and a 6/5/6/5/6/13 polycyclic system, respectively. Biologically, 13 displayed significant inhibitory activity against protein tyrosine phosphatases CD45, TCPTP, SHP1, and PTP1B with IC
50 values of 8.1-17.8 μM, and 1 , 2 , 5 , 8 - 10 , 12 , and 13 showed antibacterial activity against six pathogens. Their structure-activity relationship is also discussed.- Published
- 2022
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27. [Research progress on camptothecin and its derivative nano-prodrugs based on tumor microenvironment response].
- Author
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Wu H, Hu MS, Luo LX, Zhou HP, Hu JL, Xia J, Ke ZC, Wang Y, and Song J
- Subjects
- Camptothecin therapeutic use, Cell Line, Tumor, Humans, Tumor Microenvironment, Antineoplastic Agents therapeutic use, Neoplasms drug therapy, Prodrugs therapeutic use
- Abstract
Nano-prodrug, one of the most widely used nano-formulation at present, has excellent efficacies in tumor treatment with high potential and clinical value. Camptothecin and its derivatives have broad prospects in the preparation of prodrugs for the treatment of tumors. Given the special microenvironment of tumors, including partial acidity, high concentration of reactive oxygen species, high concentration of glutathione and enzyme concentration, a large number of tumor microenvironment-responsive camptothecin and its derivative prodrugs were prepared. This paper classified them from the microenvironment response types and drug release characteristics, reviewed the research progress of camptothecin and its derivative prodrugs based on safety and clinical trials, and analyzed the existing problems and deficiencies, hoping to provide references for the development of camptothecin and its derivatives.
- Published
- 2022
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28. Isoquinoline Alkaloids as Protein Tyrosine Phosphatase Inhibitors from a Deep-Sea-Derived Fungus Aspergillus puniceus .
- Author
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Liu CM, Yao FH, Lu XH, Zhang XX, Luo LX, Liang X, and Qi SH
- Subjects
- Alkaloids chemistry, Animals, Anti-Bacterial Agents chemistry, Antineoplastic Agents chemistry, Aquatic Organisms, Cell Line, Tumor drug effects, Humans, Inhibitory Concentration 50, Isoquinolines chemistry, Methicillin-Resistant Staphylococcus aureus drug effects, Microbial Sensitivity Tests, Alkaloids pharmacology, Anti-Bacterial Agents pharmacology, Antineoplastic Agents pharmacology, Aspergillus, Isoquinolines pharmacology, Protein Tyrosine Phosphatases antagonists & inhibitors
- Abstract
Puniceusines A-N ( 1 - 14 ), 14 new isoquinoline alkaloids, were isolated from the extracts of a deep-sea-derived fungus, Aspergillus puniceus SCSIO z021. Their structures were elucidated by spectroscopic analyses. The absolute configuration of 9 was determined by ECD calculations, and the structures of 6 and 12 were further confirmed by a single-crystal X-ray diffraction analysis. Compounds 3 - 5 and 8 - 13 unprecedentedly contained an isoquinolinyl, a polysubstituted benzyl or a pyronyl at position C-7 of isoquinoline nucleus. Compounds 3 and 4 showed selective inhibitory activity against protein tyrosine phosphatase CD45 with IC
50 values of 8.4 and 5.6 µM, respectively, 4 also had a moderate cytotoxicity towards human lung adenocarcinoma cell line H1975 with an IC50 value of 11.0 µM, and 14 , which contained an active center, -C=N+ , exhibited antibacterial activity. An analysis of the relationship between the structures, enzyme inhibitory activity and cytotoxicity of 1 - 14 revealed that the substituents at C-7 of the isoquinoline nucleus could greatly affect their bioactivity.- Published
- 2022
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29. [Discussion on the application of ventilatory threshold in classification of physical workload in plateau].
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Qi HH, Tian Y, Luo LX, Zhang Y, Wang Y, and Zhou DL
- Subjects
- Exercise Test, Heart Rate, Humans, Male, Oxygen Consumption, Workload
- Abstract
Objective: To explore the application of the first ventilatory threshold (VT1) and the second ventilatory threshold (VT2) in the classification of physical workload for plateau workers, to provide reference for formulating the classification in plateau. Methods: In August 2018, 88 male workers from substations at different altitudes (500 m, 2000 m, 3000 m and 4000 m) of a company were selected as study subjects by cluster sampling. They were divided into plain group and plateau groups.The intensities of workload were simulated by power bicycle, and physiologic parameters, including VO(2), heart rate (HR) and energy metabolic rate per body surface area (E/BSA) , were recorded in test system when reaching VT1, VT2 and peak oxygen uptake (VO(2)Peak) . The ratios of VT1, VT2 and VO(2)Peak to the quiet and work potential at different altitudes were compared. Results: In a quiet state, compared with the plain group, the HR and E/BSA of the workers in the 2000 m and 3000 m groups increased, and the differences were statistically significant ( P <0.05) . At VT2, compared with the plain group, the HR of the workers in the 4000 m group decreased, the difference was statistically significant ( P <0.05) . VO(2) and E/BSA of workers in each plateau group were lower than those in the plain group at VO(2)Peak, and the differences were statistically significant ( P <0.05) . At VT2 and VO(2)Peak, the ratios of VO(2), HR, and E/BSA relative to the quiet state of the workers in each plateau group were lower than those of the plain group, and the differences were statistically significant ( P <0.05) . In the quiet state and VT1, compared with the plain group, the remaining percentages of VO(2) and E/BSA of workers in each plateau group decreased, and the differences were statistically significant ( P <0.05) . Taking VT1, VT2 and VO(2)Peak as cut-off points and VO(2), HR and E/BSA as indicators, the physical workload in plateau could be divided into four levels, namely medium, heavy, extremely heavy and extreme physical workload. Conclusion: It is practicable to use ventilatory threshold to classification of physical workload. VT1 and VT2 can be applied to the classification in plateau to supplement and optimize current national standard of physical workload.
- Published
- 2021
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30. Cholesteric Molecular Tweezer Artificial Receptor for Rapid and Highly Selective Detection of Ag + in Food Samples.
- Author
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Liu Z, Ye Y, Wang H, and Luo LX
- Subjects
- Biosensing Techniques, Food Analysis, Molecular Dynamics Simulation, Receptors, Artificial chemistry, Silver analysis
- Abstract
Chiral cholesteric molecular tweezer 7a was synthesized, and its recognition properties for Ag
+ , Al3+ , Ca2+ etc., were investigated by UV and fluorescence spectra. The results showed that in ethanol/Tris (1/1, v / v , pH 7.0) buffer solution, the host molecular tweezer 7a had a specific recognition ability for Ag+ , the detection limit was up to 1 × 10-6 mol/L, and other metal ions had little effect on Ag+ recognition. At the same time, the naked-eye detection of Ag+ was realized by the light red color of the complex solution. Furthermore, the mechanism of recognition of Ag+ by molecular tweezer 7a was studied by a nuclear magnetic titration test and computer molecular simulation, and a rapid detection method of Ag+ using host molecular tweezer 7a was established. Through the determination of Ag+ in milk powder, quinoa and other food samples, it was proved that this novel method had a good application prospect for the detection of Ag+ in food.- Published
- 2021
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31. LncRNA H19 Inhibits the Progression of Sepsis-Induced Myocardial Injury via Regulation of the miR-93-5p/SORBS2 Axis.
- Author
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Shan B, Li JY, Liu YJ, Tang XB, Zhou Z, and Luo LX
- Subjects
- Adaptor Proteins, Signal Transducing antagonists & inhibitors, Apoptosis drug effects, Apoptosis physiology, Disease Progression, Humans, Lipopolysaccharides toxicity, MicroRNAs antagonists & inhibitors, Mitochondria drug effects, Mitochondria metabolism, Myocytes, Cardiac drug effects, RNA-Binding Proteins antagonists & inhibitors, Sepsis prevention & control, Adaptor Proteins, Signal Transducing biosynthesis, MicroRNAs biosynthesis, Myocytes, Cardiac metabolism, RNA, Long Noncoding biosynthesis, RNA-Binding Proteins biosynthesis, Sepsis metabolism
- Abstract
Sepsis is an infectious disease that seriously endangers human health. It usually leads to myocardial injury which seriously endangers to the health of human beings. H19 has been confirmed to play key roles in various diseases, including sepsis. However, its function in the progression of sepsis-induced myocardial injury remains largely unknown. H9C2 cells were treated with lipopolysaccharide (LPS) to mimic sepsis-induced myocardial injury in vitro. Cell proliferation and apoptosis were detected by MTT assay and flow cytometry, respectively. In addition, gene and protein expression levels in H9C2 cells were measured by quantitative real-time PCR (qRT-PCR) and Western blotting. The levels of inflammatory cytokines in H9C2 cell supernatants were tested by ELISA. JC-1 staining was performed to observe the mitochondrial membrane potential level in H9C2 cells. H19 and SORBS2 were downregulated in H9C2 cells following LPS treatment, while miR-93-5p was upregulated. Moreover, LPS-induced cell growth inhibition and mitochondrial damage were significantly reversed by overexpression of H19. In addition, H19 upregulation notably suppressed LPS-induced inflammatory responses in H9C2 cells. Moreover, H19 sponged miR-93-5p to promote SORBS2 expression. Overall, H19 suppressed sepsis-induced myocardial injury via regulation of the miR-93-5p/SORBS2 axis. H19 attenuated the development of sepsis-induced myocardial injury in vitro via modulation of the miR-93-5p/SORBS2 axis. Thus, H19 could serve as a potential target for the treatment of sepsis-induced myocardial injury.
- Published
- 2021
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32. Effect of chemical composition of black tea infusion on the color of milky tea.
- Author
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Mao YL, Wang JQ, Chen GS, Granato D, Zhang L, Fu YQ, Gao Y, Yin JF, Luo LX, and Xu YQ
- Subjects
- Antioxidants analysis, Flavonoids analysis, Phenols analysis, Camellia sinensis, Tea
- Abstract
Milky tea is popular in many countries and its color is an important sensory property. The effects of black tea infusion on the color of milky tea prepared with non-dairy creamer were investigated. The results showed that the redder black tea infusion produced milky tea with more redness, and the color of milky tea was a pleasant pink when the a* value (redness indicator) was in the range of 6.0-7.0. Correlation analysis revealed that the respective theaflavins (TFs), thearubigins (TRs), thearubigins (TBs), (-)-epigallocatechin-3-gallate (EGCG) and chlorogenic acid contents significantly correlated with the a* values of milky tea. A series of complementary experiments were performed to elucidate that TFs and EGCG contributed to the redness of milky tea. The color formation was mainly associated with the binding of phenols to the proteins in the non-dairy creamer. These results contribute to understand the mechanism of color formation in milky tea., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Published
- 2021
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33. Microscopic anatomy and ultrastructure of the resin ducts of Ferula ferulaeoides (Steud.) Korov. in Xinjiang.
- Author
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Liu MM, Zhang SW, Liu QG, Guo MM, Liang SH, Luo LX, Liu WX, Zhu Y, and Liao K
- Subjects
- Plant Roots, Resins, Plant, Apiaceae, Ferula
- Abstract
Ferula ferulaeoides (Steud.) Korov. is a perennial herb that belongs to Umbelliferae (Apiaceae). Its resin and roots have extensive commercial and medicinal value in the Xinjiang region. However, the resin-secreting resin ducts (RDs) of F. ferulaeoides have not been studied in detail. This study used optical and transmission electron microscopy to explore the anatomical features, including the distribution, size, and structure, of the RDs among different organs of F. ferulaeoides. The microstructure data revealed that the RDs consisted of a round lumen, a layer of secretory cells, and multiple layers of sheath cells. Notably, the RDs in stem were arranged alternatively in a multilayered ring with vascular bundles of three distinct sizes. The ultrastructural analysis revealed that organelles in the secretory cells potentially play important roles in resin secretion. Those data may be of great significance to understanding the anatomy of the RDs in Ferula L. and Umbelliferae., (© 2020 Wiley Periodicals LLC.)
- Published
- 2020
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34. Identification of a new inhibitor of KRAS-PDEδ interaction targeting KRAS mutant nonsmall cell lung cancer.
- Author
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Leung EL, Luo LX, Li Y, Liu ZQ, Li LL, Shi DF, Xie Y, Huang M, Lu LL, Duan FG, Huang JM, Fan XX, Yuan ZW, Ding J, Yao XJ, Ward DC, and Liu L
- Subjects
- A549 Cells, Animals, Benzofurans pharmacokinetics, Benzofurans pharmacology, Carcinoma, Non-Small-Cell Lung enzymology, Carcinoma, Non-Small-Cell Lung genetics, Cell Line, Tumor, Cyclic Nucleotide Phosphodiesterases, Type 6 metabolism, Female, Humans, Hydrazones pharmacokinetics, Lung Neoplasms enzymology, Lung Neoplasms genetics, Male, Mice, Mice, Nude, NIH 3T3 Cells, Proto-Oncogene Proteins p21(ras) metabolism, Random Allocation, Rats, Rats, Sprague-Dawley, Xenograft Model Antitumor Assays, Carcinoma, Non-Small-Cell Lung drug therapy, Cyclic Nucleotide Phosphodiesterases, Type 6 antagonists & inhibitors, Hydrazones pharmacology, Lung Neoplasms drug therapy, Proto-Oncogene Proteins p21(ras) antagonists & inhibitors, Proto-Oncogene Proteins p21(ras) genetics
- Abstract
Oncogenic KRAS is considered a promising target for anti-cancer therapy. However, direct pharmacological strategies targeting KRAS-driven cancers remained unavailable. The prenyl-binding protein PDEδ, a transporter of KRAS, has been identified as a potential target for pharmacological inhibitor by selectively binding to its prenyl-binding pocket, impairing oncogenic KRAS signaling pathway. Here, we discovered a novel PDEδ inhibitor (E)-N'-((3-(tert-butyl)-2-hydroxy-6,7,8,9-tetrahydrodibenzo[b,dfuran-1-yl)methylene)-2,4-dihydroxybenzohydrazide(NHTD) by using a high-throughput docking-based virtual screening approach. In vitro and in vivo studies demonstrated that NHTD suppressed proliferation, induced apoptosis and inhibited oncogenic K-RAS signaling pathways by disrupting KRAS-PDEδ interaction in nonsmall cell lung cancer (NSCLC) harboring KRAS mutations. NHTD redistributed the localization of KRAS to endomembranes by targeting the prenyl-binding pocket of PDEδ and exhibited the suppression of abnormal KRAS function. Importantly, NHTD prevented tumor growth in xenograft and KRAS mutant mouse model, which presents an effective strategy targeting KRAS-driven cancer., (© 2019 UICC.)
- Published
- 2019
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35. Effect of lens constants optimization on the accuracy of intraocular lens power calculation formulas for highly myopic eyes.
- Author
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Zhang JQ, Zou XY, Zheng DY, Chen WR, Sun A, and Luo LX
- Abstract
Aim: To evaluate the effect of different lens constant optimization methods on the accuracy of intraocular lens (IOL) power calculation formulas for highly myopic eyes., Methods: This study comprised 108 eyes of 94 consecutive patients with axial length (AL) over 26 mm undergoing phacoemulsification and implantation of a Rayner (Hove, UK) 920H IOL. Formulas were evaluated using the following lens constants: manufacturer's lens constant, User Group for Laser Interference Biometry (ULIB) constant, and optimized constant for long eyes. Results were compared with Barrett Universal II formula, original Wang-Koch AL adjustment method, and modified Wang-Koch AL adjustment method. The outcomes assessed were mean absolute error (MAE) and percentage of eyes with IOL prediction errors within ±0.25, ±0.50, and ±1.0 diopter (D). The nonparametric method, Friedman test, was used to compare MAE performance among constants., Results: Optimized constants could significantly reduce the MAE of SRK/T, Hoffer Q, and Holladay 1 formulas compared with manufacturer's lens constant, whereas the percentage of eyes with IOL prediction errors within ±0.25, ±0.50, and ±1.0 D had no statistically significant differences. Optimized lens constant for long eyes alone showed non-significant refractive advantages over the ULIB constant. Barrett Universal II formula and formulas with AL adjustment showed significantly higher accuracy in highly myopic eyes ( P <0.001)., Conclusion: Lens constant optimization for the subset of long eyes reduces the refractive error only to a limited extent for highly myopic eyes.
- Published
- 2019
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36. Identification of a new pyruvate kinase M2 isoform (PKM2) activator for the treatment of non-small-cell lung cancer (NSCLC).
- Author
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Li RZ, Fan XX, Shi DF, Zhu GY, Wang YW, Luo LX, Pan HD, Yao XJ, Leung EL, and Liu L
- Subjects
- Antineoplastic Agents metabolism, Antineoplastic Agents pharmacology, Antineoplastic Agents therapeutic use, Apoptosis drug effects, Binding Sites, Carcinoma, Non-Small-Cell Lung drug therapy, Cell Line, Tumor, Humans, Isoenzymes chemistry, Isoenzymes metabolism, Lung Neoplasms drug therapy, Molecular Docking Simulation, Protein Structure, Tertiary, Pyruvate Kinase metabolism, Sulfonamides chemistry, Sulfonamides metabolism, Sulfonamides pharmacology, Sulfonamides therapeutic use, Antineoplastic Agents chemistry, Pyruvate Kinase chemistry
- Abstract
Lung cancer is the number one cancer in terms of both mortality and incidence. Cancer cells differ from normal cells in that they can reprogram their metabolism to support a rapid proliferation rate and alter oxidative phosphorylation processes toward lactic acid fermentation, even under aerobic conditions. Therefore, we aimed to identify new compounds that might act as pyruvate kinase M2 isoform (PKM2) activators and to investigate their anti-cancer efficacy in non-small-cell lung cancer (NSCLC) cells. The molecular docking method was applied to screen PKM2 activators from our virtual natural products library. Then, compounds with promising docking scores were examined for cytotoxic effects in a panel of NSCLC cells using the MTT assay. Functional effects and therapeutic mechanisms were investigated by in vitro enzyme assays, western blotting (WB), and flow cytometry. Molecular docking showed that 0089-0022 acts as a potential PKM2 activator by binding to the kinase pocket. An in vitro enzyme activity assay showed that 0089-0022 is a direct PKM2 activator and that it effectively induces apoptosis in A549 and H1975 cells through inhibition of AKT phosphorylation. Our results suggest that 0089-0022 activates PKM2 and thus is a promising anti-cancer therapeutic candidate in NSCLC., (© 2018 John Wiley & Sons A/S.)
- Published
- 2018
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37. Proscillaridin A induces apoptosis and suppresses non-small-cell lung cancer tumor growth via calcium-induced DR4 upregulation.
- Author
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Li RZ, Fan XX, Duan FG, Jiang ZB, Pan HD, Luo LX, Zhou YL, Li Y, Yao YJ, Yao XJ, Leung EL, and Liu L
- Subjects
- Acetyl-CoA Carboxylase metabolism, Adenylate Kinase metabolism, Carcinoma, Non-Small-Cell Lung metabolism, Cell Line, Tumor, Cell Proliferation drug effects, ErbB Receptors genetics, ErbB Receptors metabolism, Humans, JNK Mitogen-Activated Protein Kinases metabolism, Lung Neoplasms metabolism, Models, Biological, Mutation genetics, NF-kappa B metabolism, Phosphorylation drug effects, Proscillaridin chemistry, Signal Transduction drug effects, Sodium-Potassium-Exchanging ATPase metabolism, Tumor Stem Cell Assay, Xenograft Model Antitumor Assays, Apoptosis drug effects, Calcium pharmacology, Carcinoma, Non-Small-Cell Lung pathology, Lung Neoplasms pathology, Proscillaridin pharmacology, Receptors, TNF-Related Apoptosis-Inducing Ligand metabolism, Up-Regulation drug effects
- Abstract
Non-small-cell lung cancer (NSCLC) is the predominant histological type of lung cancer and is characterized by the highest mortality and incidence rates among these types of malignancies. Cardiac glycosides, a class of natural products, have been identified as a potential type of chemotherapeutic agent. This study aims to investigate the anti-cancer effects and the mechanisms of action of Proscillaridin A (P.A) in NSCLC cells. In vitro sodium-potassium pump (Na
+ /K+ ATPase) enzyme assays indicated that P.A is a direct Na+ /K+ ATPase inhibitor. P.A showed potent cytotoxic effects in NSCLC cells at nanomolar levels. Treatment mechanism studies indicated that P.A elevated Ca2+ levels, activated the AMPK pathway and downregulated phosphorylation of ACC and mTOR. Subsequently, P.A increased death receptor 4 (DR4) expression and downregulated NF-κB. Interestingly, P.A selectively suppressed EGFR activation in EGFR mutant cells but not in EGFR wild-type cells. In vivo, P.A significantly suppressed tumor growth in nude mice compared to vehicle-treated mice. Compared with the Afatinib treatment group, P.A displayed less pharmaceutical toxicity, as the body weight of mice treated with P.A did not decrease as much as those treated with Afatinib. Consistent changes in protein levels were obtained from western blotting analysis of tumors and cell lines. Immunohistochemistry analysis of the tumors from P.A-treated mice showed a significant suppression of EGFR phosphorylation (Tyr 1173) and reduction of the cell proliferation marker Ki-67. Taken together, our results suggest that P.A is a promising anti-cancer therapeutic candidate for NSCLC.- Published
- 2018
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38. Honokiol Inhibits Proliferation, Invasion and Induces Apoptosis Through Targeting Lyn Kinase in Human Lung Adenocarcinoma Cells.
- Author
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Dai X, Li RZ, Jiang ZB, Wei CL, Luo LX, Yao XJ, Li GP, and Leung EL
- Abstract
Honokiol is a natural compound with small molecular structure and extracted from bark of magnolia trees. The biological activities of honokiol include anti-oxidation, anti-inflammation as well as anti-tumor. However, their mechanism remains unknown. In this study, A549 cell line and EGFR-mutant cell line PC-9 with higher expression level of Lyn than A549 cells were used to assess the anti-tumor effects of honokiol. As shown in this study, honokiol is an effective drug on inhibiting proliferation and inducing apoptosis depended on Lyn and EGFR signal pathway regulated by Lyn, and its efficacy is stronger in PC-9 cells than A549 cells. In addition, this anti-tumor effect in PC-9 cells was weakened by Lyn-knockdown. Taken together, this study indicated the mechanism of honokiol on lung adenocarcinoma and provides a possibility of honokiol as an effective anti-tumor medicine.
- Published
- 2018
- Full Text
- View/download PDF
39. Inhibition of KRAS-dependent lung cancer cell growth by deltarasin: blockage of autophagy increases its cytotoxicity.
- Author
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Leung ELH, Luo LX, Liu ZQ, Wong VKW, Lu LL, Xie Y, Zhang N, Qu YQ, Fan XX, Li Y, Huang M, Xiao DK, Huang J, Zhou YL, He JX, Ding J, Yao XJ, Ward DC, and Liu L
- Subjects
- A549 Cells, Animals, Autophagy drug effects, Cell Line, Tumor, Female, Humans, Lung Neoplasms genetics, Lung Neoplasms metabolism, Lung Neoplasms pathology, Mice, Mice, Nude, Proto-Oncogene Proteins p21(ras) antagonists & inhibitors, Xenograft Model Antitumor Assays, Benzimidazoles pharmacology, Lung Neoplasms drug therapy, Proto-Oncogene Proteins p21(ras) metabolism
- Abstract
Deltarasin is a recently identified small molecule that can inhibit KRAS-PDEδ interactions by binding to a hydrophobic pocket on PDEδ, resulting in the impairment of cell growth, KRAS activity, and RAS/RAF signaling in human pancreatic ductal adenocarcinoma cell lines. Since KRAS mutations are the most common oncogene mutations in lung adenocarcinomas, implicated in over 30% of all lung cancer cases, we examined the ability of deltarasin to inhibit KRAS-dependent lung cancer cell growth. Here, for the first time, we document that deltarasin produces both apoptosis and autophagy in KRAS-dependent lung cancer cells in vitro and inhibits lung tumor growth in vivo. Deltarasin induces apoptosis by inhibiting the interaction of with PDEδ and its downstream signaling pathways, while it induces autophagy through the AMPK-mTOR signaling pathway. Importantly, the autophagy inhibitor, 3-methyl adenine (3-MA) markedly enhances deltarasin-induced apoptosis via elevation of reactive oxygen species (ROS). In contrast, inhibition of ROS by N-acetylcysteine (NAC) significantly attenuated deltarasin-induced cell death. Collectively, these observations suggest that the anti-cancer cell activity of deltarasin can be enhanced by simultaneously blocking "tumor protective" autophagy, but inhibited if combined with an anti-oxidant.
- Published
- 2018
- Full Text
- View/download PDF
40. Suppression of Lipogenesis via Reactive Oxygen Species-AMPK Signaling for Treating Malignant and Proliferative Diseases.
- Author
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Fan XX, Leung EL, Xie Y, Liu ZQ, Zheng YF, Yao XJ, Lu LL, Wu JL, He JX, Yuan ZW, Fu J, Wei CL, Huang J, Xiao DK, Luo LX, Jiang ZB, Zhou YL, Kam RK, and Liu L
- Subjects
- Arthritis, Rheumatoid genetics, Arthritis, Rheumatoid metabolism, Arthritis, Rheumatoid pathology, Berberine administration & dosage, Carcinoma, Non-Small-Cell Lung genetics, Carcinoma, Non-Small-Cell Lung metabolism, Carcinoma, Non-Small-Cell Lung pathology, Cell Line, Tumor, Cell Proliferation drug effects, Drug Resistance, Neoplasm genetics, Fibroblasts drug effects, Fibroblasts pathology, Gefitinib, Gene Expression Regulation drug effects, Humans, Oxidation-Reduction, Quinazolines administration & dosage, Quinazolines adverse effects, Reactive Oxygen Species metabolism, Signal Transduction drug effects, Synovial Fluid drug effects, Synovial Fluid metabolism, AMP-Activated Protein Kinases genetics, Arthritis, Rheumatoid drug therapy, Carcinoma, Non-Small-Cell Lung drug therapy, Lipogenesis genetics, Sterol Regulatory Element Binding Protein 1 genetics
- Abstract
Aims: Systemic diseases often have common characteristics. The aim of this study was to investigate the feasibility of targeting common pathological metabolism to inhibit the progression of malignant and proliferative diseases., Results: Gefitinib-resistant (G-R) nonsmall-cell lung cancer (NSCLC) and rheumatoid arthritis (RA) were studied as conditions representative of malignant and proliferative diseases, respectively. Strong lipogenic activity and high expression of sterol regulatory element-binding protein 1 (SREBP1) were found in both G-R NSCLC cells and synovial fibroblasts from RA patients (RASFs). Berberine (BBR), an effective suppressor of SREBP1 and lipogenesis regulated through reactive oxygen species (ROS)/AMPK pathway, selectively inhibited the growth of G-R NSCLC cells and RASFs but not that of normal cells. It effectively caused mitochondrial dysfunction, activated ROS/AMPK pathway, and finally suppressed cellular lipogenesis and cell proliferation. Addition of ROS blocker, AMPK inhibitor, and palmitic acid significantly reduced the effect of BBR. In an in vivo study, treatment of BBR led to significant inhibition of mouse tumor xenograft growth and remarkably slowed down the development of adjuvant-induced arthritis in rats. Innovation and Conclusion: Targeting ROS/AMPK/lipogenesis signaling pathway selectively inhibited the growth of G-R NSCLC cells and the progress of RASFs in vitro and in vivo, which provides a new avenue for treating malignancies and proliferative diseases. Antioxid. Redox Signal. 28, 339-357.
- Published
- 2018
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41. Timing and approaches in congenital cataract surgery: a four-year, two-layer randomized controlled trial.
- Author
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Lin HT, Long EP, Chen JJ, Liu ZZ, Lin ZL, Cao QZ, Zhang XY, Wu XH, Wang QW, Lin DR, Li XY, Liu JC, Luo LX, Qu B, Chen WR, and Liu YZ
- Abstract
Aim: To compare visual prognoses and postoperative adverse events of congenital cataract surgery performed at different times and using different surgical approaches., Methods: In this prospective, randomized controlled trial, we recruited congenital cataract patients aged 3mo or younger before cataract surgery. Sixty-one eligible patients were randomly assigned to two groups according to surgical timing: a 3-month-old group and a 6-month-old group. Each eye underwent one of three randomly assigned surgical procedures, as follows: surgery A, lens aspiration (I/A); surgery B, lens aspiration with posterior continuous curvilinear capsulorhexis (I/A+PCCC); and surgery C, lens aspiration with posterior continuous curvilinear capsulorhexis and anterior vitrectomy (I/A+PCCC+A-Vit). The long-term best-corrected visual acuity (BCVA) and the incidence of complications in the different groups were compared and analyzed., Results: A total of 57 participants (114 eyes) with a mean follow-up period of 48.7mo were included in the final analysis. The overall logMAR BCVA in the 6-month-old group was better than that in the 3-month-old group (0.81±0.28 vs 0.96±0.30; P =0.02). The overall logMAR BCVA scores in the surgery B group were lower than the scores in the A and C groups (A: 0.80±0.29, B: 1.02±0.28, and C: 0.84±0.28; P =0.007). A multivariate linear regression revealed no significant relationships between the incidence of complications and long-term BCVA., Conclusion: It might be safer and more beneficial for bilateral total congenital cataract patients to undergo surgery at 6mo of age than 3mo. Moreover, with rigorous follow-up and timely intervention, the postoperative complications in these patients are treatable and do not compromise visual outcomes.
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- 2017
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42. Identification of a potent kinase inhibitor targeting EML4-ALK fusion protein in non-small cell lung cancer.
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Luo LX, Li Y, Niu YZ, Wang YW, Wang QQ, Fan XX, Xu JH, Liu L, Leung EL, and Yao XJ
- Abstract
ALK-fusion proteins play a fundamental role in the development of about 5% of non-small cell lung cancers. Herein, we identified the compound 5067-0952 as a potent ALK inhibitor, which inhibited cell growth, induced apoptosis, and suppressed the phosphorylation of ALK, subsequently blocking its downstream signaling pathway.
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- 2017
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43. Honokiol Induces Apoptosis, G1 Arrest, and Autophagy in KRAS Mutant Lung Cancer Cells.
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Luo LX, Li Y, Liu ZQ, Fan XX, Duan FG, Li RZ, Yao XJ, Leung EL, and Liu L
- Abstract
Aberrant signaling transduction induced by mutant KRAS proteins occurs in 20∼30% of non-small cell lung cancer (NSCLC), however, a direct and effective pharmacological inhibitor targeting KRAS has not yet reached the clinic to date. Honokiol, a small molecular polyphenol natural biophenolic compound derived from the bark of magnolia trees, exerts anticancer activity, however, its mechanism remains unknown. In this study, we sought to investigate the in vitro effects of honokiol on NSCLC cell lines harboring KRAS mutations. Honokiol was shown to induce G1 arrest and apoptosis to inhibit the growth of KRAS mutant lung cancer cells, which was weakened by an autophagy inhibitor 3-methyladenine (3-MA), suggesting a pro-apoptotic role of honokiol-induced autophagy that was dependent on AMPK-mTOR signaling pathway. In addition, we also discovered that Sirt3 was significantly up-regulated in honokiol treated KRAS mutant lung cancer cells, leading to destabilization of its target gene Hif-1α, which indicated that the anticancer property of honokiol maybe regulated via a novel mechanism associated with the Sirt3/Hif-1α. Taken together, these results broaden our understanding of the mechanisms on honokiol effects in lung cancer, and reinforce the possibility of its potential anticancer benefit as a popular Chinese herbal medicine (CHM).
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- 2017
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44. Identification of mitoxantrone as a new inhibitor of ROS1 fusion protein in non-small cell lung cancer cells.
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Luo LX, Fan XX, Li Y, Peng X, Ji YC, Hsiao WW, Liu L, Leung EL, and Yao XJ
- Abstract
Mitoxantrone, an FDA-approved drug for multiple sclerosis and hormone refractory prostate cancer, is identified as a potent inhibitor of ROS1 fusion protein by in silico screening in non-small cell lung cancer cells. Mitoxantrone can suppress the phosphorylation of ROS1 and subsequently inhibit its downstream signaling pathway and thus induce cell apoptosis.
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- 2017
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45. [The effect of topiramate or carbamazepine treatment on the quality of life in patients with vestibular paroxysmia].
- Author
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Luo LX, Li JJ, Ye H, Li ZW, Gong HX, and Yang XJ
- Abstract
Objective: To study the effect of topiramate or carbamazepine treatment on the quality of life (QOL) in patients with vestibular paroxysmia(VP). Method: Thirty-five cases diagnosed as VP from September 2012 to September 2015 were retrospectively studied. Medical outcomes study short form(SF-36)and the dizziness handicap inventory(DHI) were used to analyze the QOL. Result: After topiramate or carbamazepine treatment for one month, the scores of physical function, role physical, general health, vitality, social functioning, role emotional in SF-36 were significantly increased than pre-treatment( P < 0.01); and the scores of emotion, function and physiology in DHI were significantly decreased than pre-treatment( P < 0.01). Conclusion: Topiramate and carbamazepine may obviously improve the QOL of VP patients.The SF-36 and DHI scales could reflect the change of QOL in VP patients., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Editorial Department of Journal of Clinical Otorhinolaryngology Head and Neck Surgery.)
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- 2016
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46. Quantitative proteomics identifies 38 proteins that are differentially expressed in cucumber in response to cucumber green mottle mosaic virus infection.
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Liu HW, Liang CQ, Liu PF, Luo LX, and Li JQ
- Subjects
- Chromatography, Liquid, Cucumis sativus physiology, Proteomics, Stress, Physiological, Tandem Mass Spectrometry, Cucumis sativus virology, Host-Pathogen Interactions, Plant Diseases virology, Plant Proteins analysis, Proteome analysis, Tobamovirus growth & development
- Abstract
Background: Since it was first reported in 1935, Cucumber green mottle mosaic virus (CGMMV) has become a serious pathogen in a range of cucurbit crops. The virus is generally transmitted by propagation materials, and to date no effective chemical or cultural methods of control have been developed to combat its spread. The current study presents a preliminary analysis of the pathogenic mechanisms from the perspective of protein expression levels in an infected cucumber host, with the objective of elucidating the infection process and potential strategies to reduce both the economic and yield losses associated with CGMMV., Methods: Isobaric tags for relative and absolute quantitation (iTRAQ) technology coupled with liquid chromatography-tandem mass spectrometric (LC-MS/MS) were used to identify the differentially expressed proteins in cucumber plants infected with CGMMV compared with mock-inoculated plants. The functions of the proteins were deduced by functional annotation and their involvement in metabolic processes explored by KEGG pathway analysis to identify their interactions during CGMMV infection, while their in vivo expression was further verified by qPCR., Results: Infection by CGMMV altered both the expression level and absolute quantity of 38 proteins (fold change >0.6) in cucumber hosts. Of these, 23 were found to be up-regulated, while 15 were down-regulated. Gene ontology (GO) analysis revealed that 22 of the proteins had a combined function and were associated with molecular function (MF), biological process (BP) and cellular component (CC). Several other proteins had a dual function with 1, 7, and 2 proteins being associated with BP/CC, BP/MF, CC/MF, respectively. The remaining 3 proteins were only involved in MF. In addition, Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis identified 18 proteins that were involved in 13 separate metabolic pathways. These pathways were subsequently merged to generate three network diagrams illustrating the interactions between the different pathways, while qPCR was used to track the changes in expression levels of the proteins identified at 3 time points during CGMMV infection. Taken together these results greatly expand our understanding of the relationships between CGMMV and cucumber hosts., Conclusions: The results of the study indicate that CGMMV infection significantly changes the physiology of cucumbers, affecting the expression levels of individual proteins as well as entire metabolic pathways. The bioinformatic analysis also identified several pathogenesis-related (PR) proteins that could be useful in the development of disease-resistant plants.
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- 2015
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47. [Discussion on relationship between hepatobiliary pathological changes under B-ultrasound and Clonorchis sinensis infection].
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Liang ZC, Qiu SZ, and Luo LX
- Subjects
- Adult, Aged, Animals, Antibodies, Helminth blood, China, Clonorchiasis blood, Clonorchiasis parasitology, Clonorchiasis pathology, Female, Humans, Liver diagnostic imaging, Male, Middle Aged, Ultrasonography, Young Adult, Clonorchiasis diagnostic imaging, Clonorchis sinensis physiology, Liver pathology
- Abstract
Objective: To explore the relationship between the hepatobiliary pathological changes under B-ultrasound examinations and Clonorchis sinensis infection, so as to provide the evidence for further prevention and control., Methods: The stool test and ELISA were applied to test the pathogeny and antibody to C. sinensis of the suspicious patients who had the hepatobiliary pathological changes under B-ultrasound examinations in People's Hospital of Wuxuan County from Jan. 2010 to Dec. 2013., Results: Totally 113 suspicious patients of C. sinensis infection were investigated, and the positive rates of egg and serum antibody were 64.60% (73 cases) and 66.37% (75 cases) respectively. The positive rates of the male and those aged ≥ 50 years were significantly higher than those of the female and the cases younger than 50 years respectively (χ² = 3.554, 6.267, both P < 0.05). In the C. sinensis infected patients, the degree of pathological changes of hepatobiliary was positively correlated with the infectiosity of C. sinensis (χ² = 64.952, P < 0.01)., Conclusion: The hepatobiliary pathological changes under B-ultrasound examinations may be resulted from the infection of C. sinensis, and the patients with the changes should be further investigated for the pathogen and antibody to C. sinensis.
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- 2015
48. High-Throughput Sequencing Identifies Novel and Conserved Cucumber (Cucumis sativus L.) microRNAs in Response to Cucumber Green Mottle Mosaic Virus Infection.
- Author
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Liu HW, Luo LX, Liang CQ, Jiang N, Liu PF, and Li JQ
- Subjects
- Computational Biology, Cucumis sativus genetics, Cucumis sativus immunology, Disease Resistance genetics, High-Throughput Nucleotide Sequencing, MicroRNAs chemistry, MicroRNAs genetics, Oligonucleotide Array Sequence Analysis, Plant Diseases immunology, Plant Diseases virology, RNA, Plant chemistry, RNA, Plant genetics, Sequence Analysis, RNA, Cucumis sativus virology, MicroRNAs metabolism, Plant Diseases genetics, RNA, Plant metabolism, Tobamovirus physiology
- Abstract
Seedlings of Cucumis sativus L. (cv. 'Zhongnong 16') were artificially inoculated with Cucumber green mottle mosaic virus (CGMMV) at the three-true-leaf stage. Leaf and flower samples were collected at different time points post-inoculation (10, 30 and 50 d), and processed by high throughput sequencing analysis to identify candidate miRNA sequences. Bioinformatic analysis using screening criteria, and secondary structure prediction, indicated that 8 novel and 23 known miRNAs (including 15 miRNAs described for the first time in vivo) were produced by cucumber plants in response to CGMMV infection. Moreover, gene expression profiles (p-value <0.01) validated the expression of 3 of the novel miRNAs and 3 of the putative candidate miRNAs and identified a further 82 conserved miRNAs in CGMMV-infected cucumbers. Gene ontology (GO) analysis revealed that the predicted target genes of these 88 miRNAs, which were screened using the psRNATarget and miRanda algorithms, were involved in three functional categories: 2265 in molecular function, 1362 as cellular components and 276 in biological process. The subsequent Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis revealed that the predicted target genes were frequently involved in metabolic processes (166 pathways) and genetic information processes (40 pathways) and to a lesser degree the biosynthesis of secondary metabolites (12 pathways). These results could provide useful clues to help elucidate host-pathogen interactions in CGMMV and cucumber, as well as for the screening of resistance genes.
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- 2015
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49. Microbial diversity and their roles in the vinegar fermentation process.
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Li S, Li P, Feng F, and Luo LX
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- Bacteria classification, Bacteria genetics, Bacteria isolation & purification, Bioreactors microbiology, Fermentation, Acetic Acid metabolism, Bacteria metabolism, Biodiversity
- Abstract
Vinegar is one of the oldest acetic acid-diluted solution products in the world. It is produced from any fermentable sugary substrate by various fermentation methods. The final vinegar products possess unique functions, which are endowed with many kinds of compounds formed in the fermentation process. The quality of vinegar is determined by many factors, especially by the raw materials and microbial diversity involved in vinegar fermentation. Given that metabolic products from the fermenting strains are directly related to the quality of the final products of vinegar, the microbial diversity and features of the dominant strains involved in different fermentation stages should be analyzed to improve the strains and stabilize fermentation. Moreover, although numerous microbiological studies have been conducted to examine the process of vinegar fermentation, knowledge about microbial diversity and their roles involved in fermentation is still fragmentary and not systematic enough. Therefore, in this review, the dominant microorganism species involved in the stages of alcoholic fermentation and acetic acid fermentation of dissimilar vinegars were summarized. We also summarized various physicochemical properties and crucial compounds in disparate types of vinegar. Furthermore, the merits and drawbacks of vital fermentation methods were generalized. Finally, we described in detail the relationships among microbial diversity, raw materials, fermentation methods, physicochemical properties, compounds, functionality, and final quality of vinegar. The integration of this information can provide us a detailed map about the microbial diversity and function involved in vinegar fermentation.
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- 2015
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50. End-to-End Invaginated Pancreaticojejunostomy with Three Overlapping U-Sutures--A Safe and Simple Method of Pancreaticoenteric Anastomosis.
- Author
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Li T, Luo LX, Zhang C, Wang GP, Chen ZT, Jiang ZC, Wang XY, and Zhi XT
- Subjects
- Anastomosis, Surgical adverse effects, Humans, Incidence, Pancreas surgery, Pancreatic Fistula epidemiology, Pancreatic Fistula prevention & control, Pancreaticojejunostomy adverse effects, Reproducibility of Results, Retrospective Studies, Anastomosis, Surgical methods, Pancreaticojejunostomy methods, Sutures adverse effects
- Abstract
Background: Postoperative pancreatic fistula associated with mortality and morbidity remains an intractable problem after pancreaticoduodenectomy. To date it still carries a notable incidence of roughly 10% to 30% in large series in spite of numerous pharmacological and technical methods that have been proposed to achieve a leakproof pancreatic remnant., Methods: In order to perform a safe anastomosis to pancreatic remnant with less sophisticated sutures and shorter operative duration, a fast and simple technique of end-to-end invaginated pancreaticojejunostomy with three overlapping U-sutures was devised in our institution., Results: Between April 2011 and July 2013, end-to-end invaginated pancreaticojejunostomy with three overlapping U-sutures technique was used in 23 consecutive cases that underwent pancreaticoduodenectomy in our institute. The median operative time for pancreaticojejunostomy was 12 min. The incidence of pancreatic fistula was 8.7% (n = 2) and both cases were grade A fistula with no clinical impact or delayed hospital discharge. Neither relaparotomy nor postoperative mortality was observed., Conclusions: The technique of using three overlapping U-sutures in an end-to-end invaginated pancreaticojejunostomy represents a simple management of pancreaticoenteric anastomosis with reliability and applicability, and provides an alternative choice for pancreaticojejunostomy to senior pancreatic surgeons as well as those without experience.
- Published
- 2015
- Full Text
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