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endoplasmic reticulum stress

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https://www.readbyqxmd.com/read/29913403/jnk-stat-signalling-pathway-is-involved-in-fluoride-induced-follicular-developmental-dysplasia-in-female-mice
#1
Wen-Peng Zhao, Hong-Wei Wang, Jing Liu, Pan-Pan Tan, Lin Lin, Bian-Hua Zhou
Excessive fluoride (F) intake decreases the development of potential oocytes by inducing oxidative stress and apoptosis in female mice in our previous study. This study aims to investigate the underlying mechanisms of F-induced follicular developmental dysplasia. Pathomorphological changes in the ovary tissues were observed under light and transmission electron microscopes. DNA damage and proliferation in granulosa cells were analysed by TUNEL staining and BrdU measurement. The protein expression of cell proliferation related regulatory factors including JNK, STAT3, STAT5, CDK2, CDK4, PCNA and Ki67 in the ovary tissues was measured by immunohistochemistry and Western blot analyses...
June 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/29912910/impact-of-delipidated-estrous-sheep-serum-supplementation-on-in-vitro-maturation-cryotolerance-and-endoplasmic-reticulum-stress-gene-expression-of-sheep-oocytes
#2
Natalibeth Barrera, Pedro C Dos Santos Neto, Federico Cuadro, Diego Bosolasco, Ana P Mulet, Martina Crispo, Alejo Menchaca
High lipid content of oocytes and embryos in domestic animals is one of the well-known factors associated with poor cryosurvival. Herein, we wanted to determine whether the use of delipidated estrous sheep serum during in vitro maturation (IVM) of ovine oocytes reduces the cytoplasmic lipid droplets content and improves embryo development and cryotolerance after vitrification. Cumulus oocytes complexes (COCs) were matured in vitro for 24 h in medium supplemented with whole or delipidated estrous sheep serum prior to vitrification...
2018: PloS One
https://www.readbyqxmd.com/read/29912856/melatonin-attenuates-endoplasmic-reticulum-stress-in-acute-pancreatitis
#3
Qian Zhao, Xinyue Tang, Junhua Huang, Jiajia Li, Qinfen Chen, Yangjie Sun, Jiansheng Wu
OBJECTIVES: The objective of this study is to explore the effect of melatonin on endoplasmic reticulum stress in acute pancreatitis (AP) and the molecular mechanism. METHODS: Acute pancreatitis was induced in vivo in Sprague-Dawley rats by the retrograde injection of 5% taurocholate into the biliopancreatic duct and in vitro by treating AR42J cells with cerulein (10 nmol/L) plus lipopolysaccharide (LPS) (10 mg/L). The rats and cells were treated with melatonin (50 mg/kg in rats and 0...
June 16, 2018: Pancreas
https://www.readbyqxmd.com/read/29911925/ccpg1-is-a-noncanonical-autophagy-cargo-receptor-essential-for-reticulophagy-and-pancreatic-er-proteostasis
#4
Vikramjit Lahiri, Daniel J Klionsky
Reticulophagy is the conserved macroautophagic/autophagic degradation of the endoplasmic reticulum (ER) in response to ER stress or general nutrient deprivation. Sequestration of the ER by phagophores plays an important role in regulating ER size and homeostasis. In their recent work, Smith et al. have discovered that the ER-localized protein CCPG1 is a novel mammalian reticulophagy receptor that interacts with core autophagy machinery components-LC3, GABARAP and RB1CC1-and regulates reticulophagy.
June 18, 2018: Autophagy
https://www.readbyqxmd.com/read/29911200/investigating-the-consequences-of-asymmetric-endoplasmic-reticulum-inheritance-in-saccharomyces-cerevisiae-under-stress-using-a-combination-of-single-cell-measurements-and-mathematical-modelling
#5
Felix R H Jonas, Kate E Royle, Rochelle Aw, Guy-Bart V Stan, Karen M Polizzi
Adaptation allows organisms to maintain a constant internal environment, which is optimised for growth. The unfolded protein response (UPR) is an example of a feedback loop that maintains endoplasmic reticulum (ER) homeostasis, and is characteristic of how adaptation is often mediated by transcriptional networks. The more recent discovery of asymmetric division in maintaining ER homeostasis, however, is an example of how alternative non-transcriptional pathways can exist, but are overlooked by gold standard transcriptomic or proteomic population-based assays...
March 2018: Synthetic and Systems Biotechnology
https://www.readbyqxmd.com/read/29910814/the-role-of-natural-killer-group-2-member-d-in-chronic-inflammation-and-autoimmunity
#6
REVIEW
Marina Babic, Chiara Romagnani
Current medicine and medical science puts great effort into elucidating the basis of chronicity and finding appropriate treatments for inflammatory diseases; however, the mechanisms driving aberrant immune responses are mostly unknown and deserve further study. Of particular interest is the identification of checkpoints that regulate the function and differentiation of pro-inflammatory cells during pathogenesis, along with means of their modulation for therapeutic purposes. Natural killer group 2, member D (NKG2D) is a potent activator of the immune system, known as a sensor for "induced-self" ligands, i...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29909238/autophagy-as-an-emerging-target-in-cardiorenal-metabolic-disease-from-pathophysiology-to-management
#7
REVIEW
Yingmei Zhang, Adam T Whaley-Connell, James R Sowers, Jun Ren
Although advances in medical technology and health care have improved the early diagnosis and management for cardiorenal metabolic disorders, the prevalence of obesity, insulin resistance, diabetes, hypertension, dyslipidemia, and kidney disease remains high. Findings from numerous population-based studies, clinical trials, and experimental evidence have consolidated a number of theories for the pathogenesis of cardiorenal metabolic anomalies including resistance to the metabolic action of insulin, abnormal glucose and lipid metabolism, oxidative and nitrosative stress, endoplasmic reticulum (ER) stress, apoptosis, mitochondrial damage, and inflammation...
June 15, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29909129/transmissible-gastroenteritis-virus-n-protein-causes-endoplasmic-reticulum-stress-up-regulates-interleukin-8-expression-and-its-subcellular-localization-in-the-porcine-intestinal-epithelial-cell
#8
Qi Zhang, Ying Xu, Rong Chang, Dewen Tong, Xingang Xu
This essay focuses on transmissible gastroenteritis virus (TGEV), which is an enteropathogenic virus related to contagious and acute diseases in suckling piglets. Previous literature suggests that the TGEV nucleocapsid protein (N) plays a significant role in viral transcriptional process, however, there is a need to examine other functions of TGEV N protein in the porcine intestinal epithelial cell (IEC) which is the target cell of TGEV. In the present study, we investigated the degradation, subcellular localisation, and function of TGEV N protein by examining its effects on cycle progression, endoplasmic reticulum (ER) stress, interleukin-8 (IL-8) expression, and cell survival...
June 12, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29909009/knockout-of-cnr1-prevents-metabolic-stress-induced-cardiac-injury-through-improving-insulin-resistance-ir-injury-and-endoplasmic-reticulum-er-stress-by-promoting-ampk-alpha-activation
#9
Su-Juan Pei, Huai-Yuan Zhu, Jin-Hui Guo, Xin Zhang, Zhi-Jian Deng
Obesity and diabetes are associated with diabetic cardiomyopathy (DCM). However, the pathogenesis of DCM is not fully understood. Cannabinoid receptor gene (CNR1) has been a drug target for the treatment of obesity. Here, we reported that CNR1 expression was increased in high fat diet (HFD)-induced heart of mice. Following, the wild type (CNR1+/+ ) and CNR1-knockout (CNR1-/- ) mice were employed and subjected to HFD treatments for 16 weeks to further investigate the effects of CNR1 on DCM. The results indicated that CNR1 knockout mice after HFD feeding exhibited a significant decrease of body weight and lipid accumulation in serum...
June 14, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29908494/protective-effect-of-exogenous-hydrogen-sulfide-on-pulmonary-artery-endothelial-cells-by-suppressing-endoplasmic-reticulum-stress-in-a-rat-model-of-chronic-obstructive-pulmonary-disease
#10
Hai-Bo Ding, Kai-Xiong Liu, Jie-Feng Huang, Da-Wen Wu, Jun-Ying Chen, Qing-Shi Chen
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is a multicomponent disorder characterized by inflammation, representing a significant leading cause of chronic morbidity and mortality. Reports have implicated hydrogen sulfide (H2 S) in both the pathology and treatment of COPD. The present study aimed to explore the effects involved with exogenous H2 S on endoplasmic reticulum stress (ERS) and pulmonary artery endothelial cells (PAECs) in a rat model of COPD. METHODS: Rat models of COPD were successfully established by means of passive smoke exposure and intratracheal injection with lipopolysaccharide (LPS)...
June 13, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29907570/the-endoplasmic-reticulum-resident-e3-ubiquitin-ligase-hrd1-controls-a-critical-checkpoint-in-b-cell-development-in-mice
#11
Yi Yang, Sinyi Kong, Yana Zhang, Johanna Melo-Cardenas, Beixue Gao, Yusi Zhang, Donna D Zhang, Bin Zhang, JianXun Song, Edward Thorp, Kezhong Zhang, Jinping Zhang, Deyu Fang
Humoral immunity involves multiple checkpoints that occur duringin B-cell development, maturation, and activation. The pre--B-cell receptor (pre-BCR) is expressed following the productive recombination of the immunoglobulin heavy- chain gene, and. sSignalsing through the pre-BCR are is required for the differentiation of pre-B cells into immature B cells. However, the molecular mechanisms controlling the pre-BCR expression and signaling strength remain undefined. Herein, we probed the role of the endoplasmic reticulum-associated, stress-activated E3 ubiquitin ligase HMG-CoA reductase degradation 1 (Hrd1) in B-cell differentiation...
June 15, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29906815/review-endoplasmic-reticulum-associated-degradation-erad-dependent-control-of-tri-terpenoid-metabolism-in-plants
#12
Marie-Laure Erffelinck, Alain Goossens
Plants are sessile organisms. Therefore, they developed the capacity to quickly respond to biotic and abiotic environmental stresses, for instance by producing a broad spectrum of bioactive specialized metabolites. In this defense response, the jasmonate phytohormones can instigate a signaling cascade that leads to the specific elicitation and reprograming of numerous metabolic pathways. Recent research progress has provided several insights into the regulatory networks of many specialized metabolic pathways, mainly at the transcriptional level...
June 15, 2018: Planta Medica
https://www.readbyqxmd.com/read/29906693/proteomic-response-of-gill-microsomes-of-crassostrea-brasiliana-exposed-to-diesel-fuel-water-accommodated-fraction
#13
Gabrielle do Amaral E Silva Müller, Karim Hahn Lüchmann, Guilherme Razzera, Guilherme Toledo-Silva, Maria João Bebianno, Maria Risoleta Freire Marques, Afonso Celso Dias Bainy
Diesel fuel water-accommodated fraction (diesel-WAF) is a complex mixture of organic compounds that may cause harmful effects to marine invertebrates. Expression of microsomal proteins can be changed by oil exposure, causing functional alterations in endoplasmic reticulum (ER). The aim of this study was to investigate changes in protein expression signatures in microsomes of oysterl Crassostrea brasiliana (=C.gasar) gill after exposure to 10% diesel-WAF for 24 and 72 h. Protein expression signatures of gills of oysters exposed to diesel-WAF were compared to those of unexposed oysters using two-dimensional electrophoresis (2-DE) to identify differentially expressed proteins...
June 6, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29906559/peroxiredoxin-5-prevents-iron-overload-induced-neuronal-death-by-inhibiting-mitochondrial-fragmentation-and-endoplasmic-reticulum-stress-in-mouse-hippocampal-ht-22-cells
#14
Dong Gil Lee, Min Kyoung Kam, Kyung Min Kim, Han Seop Kim, Oh-Shin Kwon, Hyun-Shik Lee, Dong-Seok Lee
Iron is an essential element for neuronal as well as cellular functions. However, Iron overload has been known to cause neuronal toxicity through mitochondrial fission, dysregulation of Ca2+ , endoplasmic reticulum (ER) stress, and reactive oxygen species (ROS) production. Nevertheless, the precise mechanisms of iron-induced oxidative stress and mitochondria- and ER-related iron toxicity in neuronal cells are not fully understood. In this study, we demonstrated that iron overload induces ROS production earlier in the ER than in the mitochondria, and peroxiredoxin 5 (Prx5), which is a kind of antioxidant induced by iron overload, prevents iron overload-induced mitochondrial fragmentation mediated by contact with ER and translocation of Drp1, by inhibiting ROS production and calcium/calcineurin pathway in HT-22 mouse hippocampal neuronal cells...
June 12, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29905889/thioredoxin-interacting-protein-mediates-mitochondrion-dependent-apoptosis-in-early-brain-injury-after-subarachnoid-hemorrhage
#15
Yidan Liang, Xudong Che, Qing Zhao, Rami Darwazeh, Hongxia Zhang, Dengzhi Jiang, Jun Zhao, Xiang Xiang, Wang Qin, Liu Liu, Zhaohui He
Early brain injury (EBI) was reported to be the primary cause of high mortality and poor outcomes in subarachnoid hemorrhage (SAH) patients, and apoptosis is regarded as the most important physiopathologic mechanism during EBI. Recently, our team found that thioredoxin-interacting protein (TXNIP) links endoplasmic reticulum stress (ER stress) to neuronal apoptosis and aggravates EBI. However, the other underlying mechanisms remain unknown. Mitochondria are considered to be the central points in integrating apoptotic cell death...
June 15, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29905752/gga-let-7f-3p-promotes-apoptosis-in-selenium-deficiency-induced-skeletal-muscle-by-targeting-selenoprotein-k
#16
Rui-Feng Fan, Chang-Yu Cao, Meng-Hao Chen, Qun-Xiang Shi, Shi-Wen Xu
Selenoprotein K (SELENOK) is primarily observed in the endoplasmic reticulum, and serves to maintain the normal physiological functions of skeletal muscle. Skeletal muscle development and regeneration are associated with significant changes in the expression of specific microRNAs (miRNAs). Downregulated SELENOK expression is observed in chicken muscles deficient of Se. However, the mechanisms of miRNA regulation of SELENOK expression remain elusive. Here, deep sequencing was used to detect the miRNA profiles of muscle in Se deficient (-Se group) and normal (C group) chickens...
June 15, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29903184/-effects-of-iodine-excess-on-islet-%C3%AE-cells-%C3%AE-tc-6-function-and-the-mechanism
#17
Zuolong Sun, Xiao Wang, Jin Chen, Peng Duan, Jing Wang, Ying Liu, Huailan Guo
OBJECTIVE: To explore the influences of iodine excess on insulin secret function of mouse insulinoma cells β-TC-6 and the mechanism. METHODS: β-TC-6 cells were treated with excessive iodine( Na I) in vitro. After 24 hour of exposure, the MTT assay was used to measure the cell viabilities. β-TC-6 cells, after 24 hour of exposure in excessive iodine, were stimulated with Krebs-Ringer bicarbonate buffer containing 5. 6mmol/L glucose for 1 hour at 37 ℃, then the supernatant was collected for insulin determination by ELISA kit...
July 2017: Wei Sheng Yan Jiu, Journal of Hygiene Research
https://www.readbyqxmd.com/read/29901626/curcumin-induces-endoplasmic-reticulum-stress-associated-apoptosis-in-human-papillary-thyroid-carcinoma-bcpap-cells-via-disruption-of-intracellular-calcium-homeostasis
#18
Li Zhang, Xian Cheng, Shichen Xu, Jiandong Bao, Huixin Yu
BACKGROUND: Thyroid cancer is the most common endocrine tumor. Our previous studies have demonstrated that curcumin can induce apoptosis in human papillary thyroid carcinoma BCPAP cells. However, the underlined mechanism has not been clearly elucidated. Endoplasmic reticulum (ER) is a major organelle for synthesis, maturation, and folding proteins as well as a large store for Ca. Overcoming chronically activated ER stress by triggering pro-apoptotic pathways of the unfolded protein response (UPR) is a novel strategy for cancer therapeutics...
June 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29901518/chronic-pancreatitis-an-update-on-genetic-risk-factors
#19
Frank U Weiss, Mariya E Skube, Markus M Lerch
PURPOSE OF REVIEW: Genetic mutations in genes within and outside of the trypsin-dependent pathologic pathway have been found to be associated with chronic pancreatitis. This review highlights recent developments. RECENT FINDINGS: CTRB1-CTRB2 has been identified as a new risk locus for chronic pancreatitis and the disease mechanism may involve trypsin degradation. Misfolding mutations in PRSS1, CPA1, and CEL, as well as environmental stress factors like tobacco and alcohol can trigger endoplasmic reticulum stress (ER-Stress)...
June 8, 2018: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/29901130/grape-seed-proanthocyanidins-protect-against-streptozotocin%C3%A2-induced-diabetic-nephropathy-by-attenuating-endoplasmic-reticulum-stress%C3%A2-induced-apoptosis
#20
Zhaoli Gao, Guangyi Liu, Zhao Hu, Weiwei Shi, Binbin Chen, Peimei Zou, Xianhua Li
Diabetic nephropathy (DN) is by far the most common cause of end‑stage renal disease (ESRD) in industrial countries, accounting for ~45% of all new ESRD cases in the United States. Grape seed proanthocyanidin extracts (GSPE) are powerful antioxidants, with an antioxidant ability 50‑fold greater than that of vitamin E and 20‑fold greater than that of vitamin C. The present study investigated whether GSPE can protect against streptozotocin (STZ)‑induced DN and aimed to elucidate a possible mechanism...
June 6, 2018: Molecular Medicine Reports
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