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https://www.readbyqxmd.com/read/29775658/hydroxysafflor-yellow-a-protects-brain-microvascular-endothelial-cells-against-oxygen-glucose-deprivation-reoxygenation-injury-involvement-of-inhibiting-autophagy-via-class-i-pi3k-akt-mtor-signaling-pathway
#1
Guang Yang, Ning Wang, Sai Wang Seto, Dennis Chang, Huazheng Liang
The present study aimed to test whether Hydroxysafflor yellow A (HSYA) protects the brain microvascular endothelial cells (BMECs) injury induced by oxygen glucose deprivation/reoxygenation (OGD/R) via the PI3K/Akt/mTOR autophagy signaling pathway. Primary rat BMECs were cultured and identified by the expression of factor VIII-related antigen before being exposed to OGD/R to imitate ischemia/reperfusion (I/R) damage in vitro. The protective effect of HSYA was evaluated by assessing (1) cellular morphologic and ultrastructural changes; (2) cell viability and cytotoxicity; (3) transendothelial electrical resistance (TEER) of monolayer BMECs; (4) cell apoptosis; (5) fluorescence intensity of LC3B; (6) LC3 mRNA expression; (7) protein expressions of LC3, Beclin-1, Zonula occludens-1 (ZO-1), phospho-Akt (p-Akt), Akt, phospho-mTOR (p-mTOR) and mTOR...
May 15, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29773091/inactivated-sendai-virus-induces-ros-dependent-apoptosis-and-autophagy-in-human-prostate-cancer-cells
#2
Miao Qian, Hai Ming Tan, Ning Yu, Tao Wang, Quan Zhang
OBJECTIVE: The current study aims to investigate the effect of Hemagglutinating virus of Japan envelope (HVJ-E) on induction of apoptosis and autophagy in human prostate cancer PC3 cells, and the underlying mechanisms. METHODS: PC3 cells were treated with HVJ-E at various multiplicity of infection (MOI), and the generated reactive oxygen species (ROS), cell viability, apoptosis, and autophagy were detected, respectively. Next, the role of ROS played in the regulation of HVJ-E-induced apoptosis and autuphagy in PC3 cells were analysed...
April 2018: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29772430/lncrna-dicer1-as1-promotes-the-proliferation-invasion-and-autophagy-of-osteosarcoma-cells-via-mir-30b-atg5
#3
Zenghui Gu, Zhenhai Hou, Longbao Zheng, Xinqiang Wang, Liangbang Wu, Cheng Zhang
Osteosarcoma is a prevalent primary malignant tumor and long non-coding RNAs (lncRNAs) have been validated to modulate the osteosarcoma tumorigenesis. In present study, our research team investigates the role of a novel identified lncRNA DICER1-AS1 on the tumor progression and autophagy. Results showed that lncRNA DICER1-AS1 was up-regulated in osteosarcoma cells using microarray analysis and RT-PCR. Cellular functional experiments revealed that DICER1-AS1 knockdown suppressed the proliferation, migration, invasion and autophagy of osteosarcoma cells in vitro...
May 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29771403/meg3-is-involved-in-the-development-of-glaucoma-through-promoting-the-autophagy-of-retinal-ganglion-cells
#4
W Sun, Y-N Li, J-F Ye, Y-Q Guan, S-J Li
OBJECTIVE: In this study, we aimed at investigating whether MEG3 may be involved in the pathogenesis of glaucoma by regulating the autophagy of retinal ganglion cells (RGCs). MATERIALS AND METHODS: We used qRT-PCR to detect the expression of MEG3 in RGC-5s cell line under high hydrostatic pressure. RGC-5s were transfected with a lentiviral vector to achieve MEG3 overexpression or knockdown. The influence of overexpression or inhibition of MEG3 on cell proliferation and apoptosis was observed using CCK-8 test and flow cytometry...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29770446/anticancer-activity-of-tetrandrine-by-inducing-pro-death-apoptosis-and-autophagy-in-human-gastric-cancer-cells
#5
Xin-Yu Bai, Yuan-Gui Liu, Wu Song, Ying-Ying Li, Dong-Shun Hou, Hao-Ming Luo, Ping Liu
OBJECTIVES: To investigate the antitumour property of tetrandrine by inducing autophagy and apoptosis in human gastric cancer cells, and to explore the potential molecular mechanisms. METHODS: The antitumour activity of tetrandrine was assessed through MTT assay. Apoptosis was measured by flow cytometry and microscopic examination of cellular morphology. The mitochondrial membrane potential was detected by staining with Rh-123. Induction of autophagy was monitored by transmission electron microscopy observation, using GFP-LC3 transfection...
May 16, 2018: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/29764778/lower-beclin-1-mrna-levels-in-pediatric-compared-with-adult-patients-with-otitis-media-with-effusion
#6
Kim Sang Hoon, Kim Myung Gu, Shim Haeng Seon, Kim Sung Su, Kim Young Il, Yeo Seung Geun
OBJECTIVES: The role of autophagy in the pathophysiology of otitis media with effusion (OME) remains unclear, particularly regarding the difference between pediatric and adult patients. The present study analyzed the expression levels of autophagy-associated mRNAs in effusion fluids obtained from pediatric and adult patients with OME. MATERIALS AND METHODS: Middle ear fluid samples were collected from 76 pediatric patients and 41 adult patients with OME, and the levels of mRNAs encoding autophagy-related genes were measured using real-time reverse transcription-polymerase chain reaction...
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29763685/autophagy-plays-a-pro-survival-role-against-methamphetamine-induced-apoptosis-in-h9c2-cells
#7
Chao Zhao, Yong Mei, Xufeng Chen, Lei Jiang, Yunfei Jiang, Xu Song, Hang Xiao, Jun Wang, Jingsong Zhang
Methamphetamine (METH) is a commonly abused psychostimulant that can induce severe neurotoxicity. Cardiovascular injury caused by METH has recently gained increasing attention; however, the underlying mechanisms remain unclear. As autophagy has been shown to be associated with cell injury, the association between autophagy and METH-mediated cell apoptosis was investigated in the present study. METH treatment significantly increased the expression of two key autophagy proteins, i.e., Beclin-1 and LC3-II, in the cardiomyocyte cell line H9C2...
May 12, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29762750/the-apoptosis-in-arsenic-induced-oxidative-stress-is-associated-with-autophagy-in-the-testis-tissues-of-chicken
#8
Y Z Shao, H J Zhao, Y Wang, J J Liu, J L Li, L Y Luo, M W Xing
The aim of this study is to investigate whether arsenic (As) could induce testicular poisoning and influence the oxidative stress, apoptosis and autophagy in chickens. Seventy-two 1-day-old male Hy-line chickens were divided into 4 groups which were exposed to 0, 0.625, 1.25, and 2.5 mg/kg body weight (BW) of arsenic trioxide (As2O3) for 30, 60 and 90 days, respectively. Histological and ultrastructural changes, antioxidant enzyme activity, mRNA and protein levels of apoptosis and autophagy-related genes were detected...
May 14, 2018: Poultry Science
https://www.readbyqxmd.com/read/29762537/the-cardioprotective-effect-of-metformin-in-doxorubicin-induced-cardiotoxicity-the-role-of-autophagy
#9
Rita Zilinyi, Attila Czompa, Andras Czegledi, Andrea Gajtko, Dora Pituk, Istvan Lekli, Arpad Tosaki
The molecular mechanisms underlying doxorubicin-induced cardiotoxicity are still being investigated, but are known to involve oxidative stress, mitochondrial dysfunction, and the dysregulation of autophagy. The objective of the current study was to examine the protective role of metformin and its effect on autophagy in doxorubicin-induced cardiotoxicity. Sprague⁻Dawley rats were divided into four groups at random. The doxorubicin-treated group received doxorubicin (3 mg/kg every second day) intraperitoneally...
May 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29762492/zika-virus-induces-autophagy-in-human-umbilical-vein-endothelial-cells
#10
Haoran Peng, Bin Liu, Toure Doueu Yves, Yanhua He, Shijie Wang, Hailin Tang, Hao Ren, Ping Zhao, Zhongtian Qi, Zhaoling Qin
Autophagy is a common strategy for cell protection; however, some viruses can in turn adopt cellular autophagy to promote viral replication. Zika virus (ZIKV) is the pathogen that causes Zika viral disease, and it is a mosquito-borne virus. However, its pathogenesis, especially the interaction between ZIKV and target cells during the early stages of infection, is still unclear. In this study, we demonstrate that infecting human umbilical vein endothelial cells (HUVEC) with ZIKV triggers cellular autophagy. We observed both an increase in the conversion of LC3-I to LC3-II and increased accumulation of fluorescent cells with LC3 dots, which are considered to be the two key indicators of autophagy...
May 15, 2018: Viruses
https://www.readbyqxmd.com/read/29761921/trans-cinnamic-aldehyde-inhibit-aggregatibacter-actinomycetemcomitans-induced-inflammation-thp-1-derived-macrophages-via-autophagy-activation
#11
Jin Chung, Sumi Kim, Hyun Ah Lee, Mi Hee Park, Seyeon Kim, Yu Ri Song, HeeSam Na
OBJECTIVES: Inflammation is an essential response against bacterial infection as a host defense mechanism, which can lead to tissue damage. Aggregatibacter actinomycetemcomitans (Aa) is major pathogen for aggressive periodontitis characterized by rapid destruction of periodontal tissue surrounding teeth. Trans-cinnamic aldehyde is a key bioactive compound of the cinnamon extracts, which has anti-inflammatory, antioxidant, antipyretic, antimicrobial, and anti-cancer properties. The objective of the present study was to investigate the anti-inflammatory effect of trans-cinnamic aldehyde against Aa infection in human THP-1 derived macrophages and on Aa-induced periodontitis in mice...
May 15, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29761894/effects-of-fucoxanthin-on-autophagy-and-apoptosis-in-sgc-7901cells-and-the-mechanism
#12
Yue Zhu, Jing Cheng, Zhenli Min, Tingzi Yin, Rong Zhang, Wei Zhang, Ling Hu, Zhiwen Cui, Chengzhi Gao, Shiqiang Xu, Chunxiang Zhang, Xiamin Hu
Autophagy and apoptosis are involved in the development of a variety of cancers. Fucoxanthin is a natural compound known to have antitumor effects, so we aimed to explore its effects on autophagy and apoptosis in gastric cancer SGC7901 cells. Specifically, we performed methyl thiazolyl tetrazolium assay, transmission electron microscopy, real-time polymerase chain reaction, Western blot analysis, immunofluorescence assay, and cell apoptosis analysis to clarify the role of fucoxanthin in SGC-7901 cells. Our results indicate that fucoxanthin significantly inhibits the viability of SGC-7901 cells, effectively inducing both autophagy and apoptosis by up-regulating the expressions of beclin-1, LC3, and cleaved caspase-3 (CC3), and by down regulating Bcl-2...
May 15, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29761825/zinc-mitigates-renal-ischemia-reperfusion-injury-in-rats-by-modulating-oxidative-stress-endoplasmic-reticulum-stress-and-autophagy
#13
Najet Hadj Abdallah, Anna Baulies, Ahlem Bouhlel, Mohamed Bejaoui, Mohamed A Zaouali, Safa Ben Mimouna, Imed Messaoudi, José C Fernandez-Checa, Carmen García Ruiz, Hassen Ben Abdennebi
Oxidative stress is a major factor involved in the pathogenesis of renal ischemia/reperfusion (I/R). Exogenous zinc (Zn) was suggested as a potent antioxidant; however, the mechanism by which it strengthens the organ resistance against the effects of reactive oxygen species (ROS) is not yet investigated. The present study aims to determine whether acute zinc chloride (ZnCl2 ) administration could attenuate endoplasmic reticulum (ER) stress, autophagy, and inflammation after renal I/R. Rats were subjected to either sham operation (Sham group, n = 6), or 1 hr of bilateral ischemia followed by 2 hr of reperfusion (I/R groups, n = 6), or they received ZnCl2 orally 24 hr and 30 min before ischemia (ZnCl2 group, n = 6)...
May 15, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29761550/mir-26a-suppresses-autophagy-in-swine-sertoli-cells-by-targeting-ulk2
#14
M Ran, Z Li, R Cao, B Weng, F Peng, C He, B Chen
A large number of microRNAs (miRNAs) have been detected from porcine testicular tissues thanks to the development of high-throughput sequencing technology. However, the regulatory roles of most identified miRNAs in swine testicular development or spermatogenesis are poorly understood. In our previous study, ULK2 (uncoordinated-51-like kinase 2) was predicted as a target gene of miR-26a. In this study, we aimed to investigate the role of miR-26a in swine Sertoli cell autophagy. The relative expression of miR-26a and ULK2 levels has a significant negative correlation (R2  = ...
May 14, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29755351/gastrodin-attenuates-bilateral-common-carotid-artery-occlusion-induced-cognitive-deficits-via-regulating-a%C3%AE-related-proteins-and-reducing-autophagy-and-apoptosis-in-rats
#15
Bo Liu, Jian-Mei Gao, Fei Li, Qi-Hai Gong, Jing-Shan Shi
Gastrodin (GAS), an active constituent extracted from Gastrodia elata Blume, is used to treat ischemic stroke, epilepsy, dizziness, and dementia for centuries in China. This study examined its effects on vascular dementia (VD) and the underlying molecular mechanisms. VD was established by ligation of bilateral common carotid artery occlusion (BCCAO). A total of 7 days after BCCAO surgery, GAS (15, 30, and 60 mg/kg) was orally administered for 28 consecutive days to evaluate therapeutic effects. Cognitive function was tested by the Morris water maze...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29752339/resveratrol-enhances-matrix-biosynthesis-of-nucleus-pulposus-cells-through-activating-autophagy-via-the-pi3k-akt-pathway-under-oxidative-damage
#16
Jinlou Gao, Qingyun Zhang, Lin Song
BACKGROUND: The decrease in nucleus pulposus (NP) matrix production is a classic  feature during disc degeneration. Resveratrol (RSV) is reported to play protective effects under many pathological factors. OBJECTIVE: This study aims to study the effects of RSV on NP matrix homeostasis under oxidative damage and the potential mechanism. METHODS: Rat NP cells were exposed to H2 O2 solution to create an oxidative damage. RSV and the 3‑Methyladenine (3-MA) was added along with the culture medium to respectively investigate the role of RSV and cellular autophagy...
May 11, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29750875/ulinastatin-alleviates-neurological-deficiencies-evoked-by-transient-cerebral-ischemia-via-improving-autophagy-nrf-2-are-and-apoptosis-signals-in-hippocampus
#17
Xiao-Ming Jiang, Jing-Hai Hu, Lu-Lu Wang, Chi Ma, Xu Wang, Xiao-Liang Liu
Ulinastatin [or called as urinary trypsin inhibitor (UTI)] plays a role in regulating neurological deficits evoked by transient cerebral ischemia. However, the underlying mechanisms still need to be determined. The present study was to examine the effects of UTI on autophagy, Nrf2-ARE and apoptosis signal pathway in the hippocampus in the process of neurological functions after cerebral ischemia using a rat model of cardiac arrest (CA). CA was induced by asphyxia followed by cardiopulmonary resuscitation (CPR) in rats...
May 10, 2018: Physiological Research
https://www.readbyqxmd.com/read/29749471/gsk3%C3%AE-%C3%A2-mediated-ser156-phosphorylation-modulates-a-bh3%C3%A2-like-domain-in-bcl2l12-during-tmz%C3%A2-induced-apoptosis-and-autophagy-in-glioma-cells
#18
Cheng-Wei Chu, Ming-Chang Yang, Chia-Hua Chou, Wen-Sheng Huang, Bo-Xiu Hsiao, Yeng-Tseng Wang, Shean-Jaw Chiou, Joon-Khim Loh, Yi-Ren Hong
BH3 domains, classified initially as BCL2 homology domains, participate in both apoptosis and autophagy. Beclin‑1 contains a BH3 domain, which is required for binding to antiapoptotic BCL2 homologs and BCL2‑mediated inhibition of autophagy. BCL2‑like 12 (BCL2L12) also harbors a BH3‑like domain, which is 12 residues long and contains a LXXXAE/D motif. In a yeast two‑hybrid system performed in the present study, BCL2L12 shared similar binding partnerships to antiapoptotic BCL2 homologs, such as Beclin‑1...
May 11, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29740349/severe-burn-induced-intestinal-epithelial-barrier-dysfunction-is-associated-with-endoplasmic-reticulum-stress-and-autophagy-in-mice
#19
Yalan Huang, Yanhai Feng, Yu Wang, Pei Wang, Fengjun Wang, Hui Ren
The disruption of intestinal barrier plays a vital role in the pathophysiological changes after severe burn injury, however, the underlying mechanisms are poorly understood. Severe burn causes the disruption of intestinal tight junction (TJ) barrier. Previous studies have shown that endoplasmic reticulum (ER) stress and autophagy are closely associated with the impairment of intestinal mucosa. Thus, we hypothesize that ER stress and autophagy are likely involved in burn injury-induced intestinal epithelial barrier dysfunction...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29738069/knockdown-of-beclin-1-impairs-epithelial-mesenchymal-transition-of-colon-cancer-cells
#20
Hong Shen, Ling Yin, Ganlu Deng, Cao Guo, Ying Han, Yiyi Li, Changjing Cai, Yaojie Fu, Shanshan Liu, Shan Zeng
Activation of autophagy significantly affects cancer cell behaviors, such as proliferation, differentiation, and invasiveness. Epithelial-to-mesenchymal transition (EMT) as an initial step of malignant transformation of cancer cells was linked to the activation of autophagy, but the detailed molecular mechanisms are still unknown. The present study investigates the effects of Beclin-1, a key molecule involved in activation of autophagy, on EMT of colon cancer cells. The normal colon epithelia cell line of CCD-18Co and six colon cancer cell lines with different expression levels of Beclin-1 were used in this study...
May 8, 2018: Journal of Cellular Biochemistry
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