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https://www.readbyqxmd.com/read/29691838/ros-autophagy-pathway-mediates-monocytes-human-umbilical-vein-endothelial-cells-adhesion-induced-by-apelin-13
#1
Meiqing Liu, Hening Li, Qun Zhou, Hong Zhao, Deguan Lv, Jiangang Cao, Jinyong Jiang, Mingzhu Tang, Di Wu, Jiaqi Liu, Lele Wu, Haoliang Hu, Lu He, Shifang Huang, Zhe Chen, Lanfang Li, Linxi Chen
Apelin is the endogenous ligand of APJ receptor. Both monocytes (MCs) and human umbilical vein endothelial cells (HUVECs) express apelin and APJ, which play important roles in the physiological processes of atherosclerosis. Our previous research indicated that apelin-13 promoted MCs-HUVECs adhesion. Here, we further explore the mechanism responsible for MCs-HUVECs adhesion induced by apelin-13. Apelin-13 promoted reactive oxygen species (ROS) generation and NOX4 expression in HUVECs. Apelin-13 inducedautophagy, increased proteins beclin1 and LC3-II/I expression and induced autophagy flux in HUVECs, which was blocked by NAC, catalase and DPI...
April 24, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29691644/mir-101-3p-induces-autophagy-in-endometrial-carcinoma-cells-by-targeting-ezh2
#2
Cuilan Wang, Bo Liu
OBJECTIVE: This study aimed to investigate the effect of miR-101-3p on autophagy in endometrial carcinoma (EC) cells and the connection between miR-101-3p and EZH2. METHODS: The expression levels of miRNAs were analyzed by microarray. The expression level of autophagy related proteins was measured by western blot. The mRNA expression level of beclin-1 was determined by qRT-PCR. Autophagy in EC cells was traced by GFP-LC3 fusion protein and observed by fluorescence microscopy...
April 24, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29689566/inhibition-of-lncrna-hrim-increases-cell-viability-by-regulating-autophagy-levels-during-hypoxia-reoxygenation-in-myocytes
#3
Zhouqing Huang, Bozhi Ye, Zhengxian Wang, Jibo Han, Lu Lin, Peiren Shan, Xueli Cai, Weijian Huang
Backgrund/Aims: Ischemia reperfusion (I/R) promotes the severity of cardiomyocyte injury. Long noncoding RNAs (LncRNAs) are key regulators in cardiovascular diseases. However, the association between LncRNAs and myocardial I/R injury has not been thoroughly characterized to date. We attempted to clarify the potential biological role of a LncRNA (E230034O05Rik), which we named hypoxia/reoxygenation (H/R) injury-related factor in myocytes (HRIM), by investigating the differential expression of LncRNAs between groups of myocytes exposed to either a normal level of oxygen or to H/R...
April 18, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29689198/grasp55-senses-glucose-deprivation-through-o-glcnacylation-to-promote-autophagosome-lysosome-fusion
#4
Xiaoyan Zhang, Leibin Wang, Behnam Lak, Jie Li, Eija Jokitalo, Yanzhuang Wang
The Golgi apparatus is the central hub for protein trafficking and glycosylation in the secretory pathway. However, how the Golgi responds to glucose deprivation is so far unknown. Here, we report that GRASP55, the Golgi stacking protein located in medial- and trans-Golgi cisternae, is O-GlcNAcylated by the O-GlcNAc transferase OGT under growth conditions. Glucose deprivation reduces GRASP55 O-GlcNAcylation. De-O-GlcNAcylated GRASP55 forms puncta outside of the Golgi area, which co-localize with autophagosomes and late endosomes/lysosomes...
April 23, 2018: Developmental Cell
https://www.readbyqxmd.com/read/29686621/pravastatin-protects-against-avascular-necrosis-of-femoral-head-via-autophagy
#5
Yun Liao, Ping Zhang, Bo Yuan, Ling Li, Shisan Bao
Autophagy serves as a stress response and may contribute to the pathogenesis of avascular necrosis of the femoral head induced by steroids. Statins promote angiogenesis and ameliorate endothelial functions through apoptosis inhibition and necrosis of endothelial progenitor cells, however the process used by statins to modulate autophagy in avascular necrosis of the femoral head remains unclear. This manuscript determines whether pravastatin protects against dexamethasone-induced avascular necrosis of the femoral head by activating endothelial progenitor cell autophagy...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29686269/lysosomal-damage-after-spinal-cord-injury-causes-accumulation-of-ripk1-and-ripk3-proteins-and-potentiation-of-necroptosis
#6
Shuo Liu, Yun Li, Harry M C Choi, Chinmoy Sarkar, Eugene Y Koh, Junfang Wu, Marta M Lipinski
Necroptosis, a regulated necrosis pathway mediated by the receptor-interacting protein kinases 1 and 3 (RIPK1 and RIPK3), is induced following spinal cord injury (SCI) and thought to contribute to neuronal and glial cell death. However, mechanisms leading to activation of necroptosis after SCI remain unclear. We have previously shown that autophagy, a catabolic pathway facilitating degradation of cytoplasmic proteins and organelles in a lysosome-dependent manner, is inhibited following SCI in rats. Our current data confirm that inhibition of autophagy also occurs after thoracic contusive SCI in the mouse model, as indicated by accumulation of both the autophagosome marker, LC3-II and autophagy cargo protein, p62/SQSTM1...
April 23, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29682563/deregulation-of-hexokinase-ii-is-associated-with-glycolysis-autophagy-and-the-epithelial-mesenchymal-transition-in-tongue-squamous-cell-carcinoma-under-hypoxia
#7
Guanhui Chen, Yadong Zhang, Jianfeng Liang, Wenqing Li, Yue Zhu, Ming Zhang, Cheng Wang, Jinsong Hou
The glycolytic enzyme Hexokinase (HKII) participates in tumor glycolysis and the progression of various cancers, but its clinicopathological effect on the progression of tongue squamous cell carcinoma (TSCC) and its role in glycolysis, autophagy, and the epithelial-mesenchymal transition of TSCC in a hypoxic microenvironment remain unknown. Our results showed that HKII expression was dramatically increased in TSCC tissues and that its upregulation was significantly associated with the presence of pathological differentiation, lymph node metastasis, and clinical stage...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29680838/mitophagy-plays-a-protective-role-in-iodinated-contrast-induced-acute-renal-tubular-epithelial-cells-injury
#8
Rong Lei, Fei Zhao, Cheng-Yuan Tang, Min Luo, Shi-Kun Yang, Wei Cheng, Xu-Wei Li, Shao-Bin Duan
BACKGROUND/AIMS: Contrast induced-acute kidney injury (CI-AKI) is one of the most common causes of acute kidney injury (AKI) in hospitalized patients. Mitophagy, the selective elimination of mitochondria via autophagy, is an important mechanism of mitochondrial quality control in physiological and pathological conditions. In this study, we aimed to determine effects of iohexol and iodixanol on mitochondrial reactive oxygen species (ROS), mitophagy and the potential role of mitophagy in CI-AKI cell models...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29680739/autophagy-is-a-pro-survival-mechanism-in-ovarian-cancer-against-the-apoptotic-effects-of-euxanthone
#9
Li Zhu, Xiuping Liu, Dongmei Li, Shuhong Sun, Yue Wang, Xianghong Sun
BACKGROUND: Ovarian cancer is one of the most prevalent gynecological malignancies and thus the development of novel therapeutic agents for managing ovarian cancer is imperative. Euxanthone, a xanthone derived from Polygala caudata, has been found to exert cytotoxic effects on cancerous cells. This study was designed to assess the role of euxanthone in ovarian cancer. METHODS AND MATERIALS: Cell Counting Kit-8 (CCK-8) assay was utilized to assess the viability of human ovarian cancer SKOV3 and OVCAR3 cell lines...
April 19, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29680738/inhibition-of-pi3k-akt-mtor-pathway-by-apigenin-induces-apoptosis-and-autophagy-in-hepatocellular-carcinoma-cells
#10
Jiali Yang, Cuicui Pi, Guanghui Wang
Apigenin is a dietary flavonoid with known antioxidant and antitumor effects against several types of cancers by promoting cell death and inducing cell cycle arrest. Apigenin also regulates a variety of intracellular signal transduction pathways during apoptosis or autophagy. However, the precise mechanism underlying the anticancer effects of apigenin in liver cancer remains poorly understood. In this study, we demonstrated that apigenin has anticancer activity against hepatocellular carcinoma cells. Apigenin inhibited the cell growth and induced cell death in a dose- and time-dependent manner in HepG2 cells...
April 19, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29679702/alamandine-attenuates-sepsis-associated-cardiac-dysfunction-via-inhibiting-mapks-signaling-pathways
#11
Peng Li, Xi-Ru Chen, Fei Xu, Chi Liu, Chang Li, Hui Liu, Hui Wang, Wei Sun, Yan-Hui Sheng, Xiang-Qing Kong
Sepsis-induced myocardial dysfunction represents a major cause of death in intensive care units. Alamandine is an important biologically active peptide in the renin-angiotensin system. The present study evaluated whether alamandine improves cardiac dysfunction, inflammation, and apoptosis, and affects the signaling pathways involved in these events. Experiments were carried out in mice treated with lipopolysaccharide (LPS) or alamandine, and in neonatal rat cardiomyocytes. Alamandine increased the ejection fraction and fractional shortening, both of which were decreased upon LPS infusion in mice...
April 18, 2018: Life Sciences
https://www.readbyqxmd.com/read/29679546/lithium-chloride-licl-induced-autophagy-and-downregulated-expression-of-transforming-growth-factor-%C3%AE-induced-protein-tgfbi-in-granular-corneal-dystrophy
#12
Danyao Nie, Yun Peng, Ming Li, Xinhua Liu, Meilan Zhu, Lin Ye
This study evaluated whether lithium chloride (LiCl) prevents cytoplasmic accumulation of mutant-transforming growth factor β-induced protein (Mut-TGFBI) in granular corneal dystrophy (GCD) via activation of the autophagy pathway. Levels of TGFBI and microtubule-associated protein 1A/1B-light chain 3 (LC3) in 3 GCD patients and healthy controls were analyzed by immunohistochemistry (IHC) staining and Western blot. Primary corneal fibroblasts were isolated and transfected with wild type or mutant type TGFBI over-expressed vectors, and then treated with LiCl and/or autophagy inhibitor 3-methyladenine (3-MA)...
April 18, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29679541/treatment-with-d-%C3%AE-hydroxybutyrate-protects-heart-from-ischemia-reperfusion-injury-in-mice
#13
Yongsheng Yu, Yunhua Yu, Yuefan Zhang, Zhigang Zhang, Weishuai An, Xianxian Zhao
The present study was designed to examine the protection of D-β-hydroxybutyrate (BHB) against ischemia/reperfusion (I/R) injury in heart and investigate its underlying mechanism. Male adult mice were exposed to 30min of ischemia and 24h of reperfusion. Osmotic pumps were implanted subcutaneously 5min before reperfusion for continuous delivery of the exogenous BHB (1.6mmol/kg/24h). Treatment with BHB reduced infarct size and levels of cardiac troponin I, creatine kinase and lactate dehydrogenase in serum, attenuated apoptosis in myocardium, and preserved cardiac function of I/R mice...
April 18, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29679350/alleviation-mechanisms-of-selenium-on-cadmium-spiked-in-chicken-ovarian-tissue-perspectives-from-autophagy-and-energy-metabolism
#14
Shuang Wang, Zhe Xu, Hang Yin, Yahong Min, Shu Li
Cadmium (Cd) is a kind of toxic heavy metal and it can cause damage to organs and tissues. Selenium (Se) can antagonize some metal element toxicity including Cd. The present study was designed to investigate Cd-induced damage to chicken ovary by autophagy and the protective mechanism of Se on Cd-induced damage. Administration of Cd for 12 weeks led to energy metabolism disorder of the chicken ovarian tissues, which resulted in autophagy. In addition, the mRNA expression of glucose-related genes including hexokinase II (HK2), pyruvate kinase (PK), pyruvate dehydrogenase complex (PDHX), and succinate dehydrogenase (SDH) and the activities of ATPase, including Na+ -K+ -ATPase, Ca2+ -ATPase, Mg2+ -ATPase, were all downregulated remarkably compared with the control...
April 21, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29678463/design-synthesis-and-antineoplastic-activity-of-novel-hybrids-of-podophyllotoxin-and-indirubin-against-human-leukaemia-cancer-cells-as-multifunctional-anti-mdr-agents
#15
Jing Wang, Li Long, Yongzheng Chen, Yingshu Xu, Lei Zhang
To overcome cancer drug resistance, in present study, a series of podophyllotoxin-indirubin hybrids were designed, synthesized, and evaluated for anticancer efficacy against two human chronic myeloid leukemia cell cultures. Among them, compound Da-1 was the most potent in resistent K562/VCR cells with an IC50 value of 0.076 ± 0.008 μM. Preliminary mechanism studies showed that Da-1 significantly induced apoptosis and cell cycle arrest at the G2 phase. Decrease in mitochondrial membrane potential, accompanied by activated PARP cleavage, was observed in K562/VCR cells after incubation with Da-1...
April 10, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29673078/crispr-cas9-mediated-gfp-knock-in-at-the-map1lc3b-locus-in-293ft-cells-is-better-for-bona-fide-monitoring-cellular-autophagy
#16
Zhiqiang Wu, Jinlin Zhao, Minghan Qiu, Zeyun Mi, Maobin Meng, Yu Guo, Hui Wang, Zhiyong Yuan
Accurately identifying and quantifying cellular autophagy is very important as the significance of autophagy in physiological and pathological processes becomes increasingly evident. Ectopically expressed fluorescent-tagged microtubule-associated protein light chain 3B (MAP1LC3B, LC3) is the most widely used reporter for monitoring autophagy activity thus far. However, this approach ignored the influence of constitutively overexpressed LC3 on autophagy itself and autophagy-related processes and its accuracy in indicating autophagy is questionable...
April 19, 2018: Biotechnology Journal
https://www.readbyqxmd.com/read/29672318/a-novel-2-methoxyestradiol-analogue-is-responsible-for-vesicle-disruption-and-lysosome-aggregation-in-breast-cancer-cells
#17
Sandra D Nkandeu, Iman van den Bout, Marianne J Cronjé, Dirk H van Papendorp, Anna M Joubert
BACKGROUND: 2-Methoxyestradiol (2ME2) is an endogenous metabolite of 17-β-estradiol with anti-proliferative and anti-angiogenic properties. Due to 2ME2's rapid metabolism and low oral bioavailability in in vivo settings, 2ME2 analogues have been designed to alleviate these issues. One of these compounds is 2-ethyl-3-O-sulphamoyl-estra-1,3,5(10)16-tetraene (ESE-16). A previous work alluded to the ability of ESE-16 to induce autophagic cell death. Therefore, we investigated the mode of action of ESE-16 by studying its effects on autophagy, vesicle formation, and lysosomal organisation...
April 19, 2018: Pharmacology
https://www.readbyqxmd.com/read/29670523/qianlie-xiaozheng-decoction-induces-autophagy-in-human-prostate-cancer-cells-via-inhibition-of-the-akt-mtor-pathway
#18
Yuehua Xu, Xueting Cai, Bin Zong, Rui Feng, Yali Ji, Gang Chen, Zhongxing Li
Qianlie Xiaozheng decoction (QLXZD), a traditional Chinese medicinal formula, has been used clinically to treat advanced prostate cancer (PCa) for more than 10 years. However, experimental evidence supporting its efficacy is lacking. Here, we investigated the anticancer properties and molecular mechanism of QLXZD in vitro in a human PCa cell line (PC3) and in vivo using PC3 xenografts in nude mice. We confirmed the antineoplastic activity of QLXZD by analyzing cell viability and tumor volume growth, which decreased significantly compared to that of the controls...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29670377/crocin-induces-autophagic-apoptosis-in-hepatocellular-carcinoma-by-inhibiting-akt-mtor-activity
#19
Chong Yao, Bing-Bing Liu, Xiao-Dong Qian, Li-Qin Li, Heng-Bin Cao, Qiao-Sheng Guo, Gui-Fen Zhou
Background: Autophagy induction is a common mechanism for antitumor chemicals in induction of cancer cell death. However, the role of autophagy in crocin-induced apoptosis is barely studied in hepatocellular carcinoma (HCC). Materials and methods: The influence of crocin on growth, apoptosis, and autophagy and its mutual relations were analyzed by Cell Counting Kit-8 assay, flow cytometer, EGFP-LC3 puncta analysis, and Western blot in HCC cells. The activities of Akt/mTOR axis and its roles in autophagy regulation were also detected by Western blot in HCC cells treated with crocin...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29670369/inhibition-of-nipbl-enhances-the-chemosensitivity-of-non-small-cell-lung-cancer-cells-via-the-dna-damage-response-and-autophagy-pathway
#20
Lei Zheng, Huanhuan Zhou, Liwei Guo, Xiaoling Xu, Shengjie Zhang, Weizhen Xu, Weimin Mao
Background: Previously, we reported that high expression of nipped-B-like protein (NIPBL) was strongly correlated with poor prognosis, tumor differentiation, and lymph node metastasis. Survival analysis indicated that NIPBL expression was a potential prognostic factor for non-small cell lung cancer (NSCLC). Moreover, loss of NIPBL decreased lung cancer cells proliferation, migration, invasion and promoted apoptosis as well as sensitivity to chemotherapeutic agents. However, the deep mechanisms were not explored...
2018: OncoTargets and Therapy
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