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https://www.readbyqxmd.com/read/29333637/increased-free-zn2-correlates-induction-of-sarco-endo-plasmic-reticulum-stress-via-altered-expression-levels-of-zn2-transporters-in-heart-failure
#1
Yusuf Olgar, Aysegul Durak, Erkan Tuncay, Ceylan Verda Bitirim, Evren Ozcinar, Mustafa Bahadir Inan, Zeynep Tokcaer-Keskin, Kamil Can Akcali, Ahmet Ruchan Akar, Belma Turan
Zn2+ -homoeostasis including free Zn2+ ([Zn2+ ]i ) is regulated through Zn2+ -transporters and their comprehensive understanding may be important due to their contributions to cardiac dysfunction. Herein, we aimed to examine a possible role of Zn2+ -transporters in the development of heart failure (HF) via induction of ER stress. We first showed localizations of ZIP8, ZIP14 and ZnT8 to both sarcolemma and S(E)R in ventricular cardiomyocytes (H9c2 cells) using confocal together with calculated Pearson's coefficients...
January 15, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29331649/friend-or-foe-reactive-oxygen-species-production-scavenging-and-signaling-in-plant-response-to-environmental-stresses
#2
Weronika Czarnocka, Stanisław Karpiński
In the natural environment, plants are exposed to a variety of biotic and abiotic stress conditions that trigger rapid changes in the production and scavenging of reactive oxygen species (ROS). The production and scavenging of ROS is compartmentalized, which means that, depending on stimuli type, they can be generated and eliminated in different cellular compartments such as the apoplast, plasma membrane, chloroplasts, mitochondria, peroxisomes, and endoplasmic reticulum. Although the accumulation of ROS is generally harmful to cells, ROS play an important role in signaling pathways that regulate acclimatory and defense responses in plants, such as systemic acquired acclimation (SAA) and systemic acquired resistance (SAR)...
January 10, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29331484/novel-biomolecular-information-in-rotenone-induced-cellular-model-of-parkinson-s-disease
#3
D Lin, Y Liang, D Zheng, Y Chen, X Jing, M Lei, Z Zeng, T Zhou, X Wu, S Peng, K Huang, L Yang, S Xiao, J Liu, E Tao
In order to uncover the remarkable pathogenic genes or molecular pathological process in Parkinson's disease (PD), we employed a microarray analysis upon the cellular PD model induced by rotenone. Compared to the control group, 2174 genes were screened out to be expressed differently in the rotenone-induced group by certain criterion. GO analysis and the pathways analysis showed the significant enrichment of genes that were associated with the biological process of cell cycle, apoptotic process, organelle fusion, mitochondrial lesion, endoplasmic reticulum stress and so on...
January 10, 2018: Gene
https://www.readbyqxmd.com/read/29331396/autophagy-in-ischemic-stroke
#4
REVIEW
Pei Wang, Bo-Zong Shao, Zhiqiang Deng, Shi Chen, Zhenyu Yue, Chao-Yu Miao
Autophagy is a self-eating cellular catabolic pathway, through which long-lived proteins, damaged organelles and misfolded proteins are degraded and recycled for the maintenance of cellular homeostasis and normal cellular functions. Autophagy plays an important homeostatic role in the regulation of cell survival. Accumulating evidence shows that autophagy is activated in various cell types in the brain such as neurons, glia cells, and brain microvascular cells upon ischemic stroke. However, the exact role and molecular mechanisms of autophagy process that is implicated in ischemic stroke have yet to be elucidated...
January 10, 2018: Progress in Neurobiology
https://www.readbyqxmd.com/read/29331057/manifestations-and-mechanisms-of-myocardial-lipotoxicity-in-obesity
#5
Arthur C Sletten, Linda R Peterson, Jean E Schaffer
Environmental and socioeconomic changes over the past thirty years have contributed to a dramatic rise in the worldwide prevalence of obesity. Heart disease is among the most serious health risks of obesity, with increases in both atherosclerotic coronary heart disease and heart failure among obese individuals. In this review, we focus on primary myocardial alterations in obesity that include hypertrophic remodeling and diastolic dysfunction. Obesity-associated perturbations in myocardial and systemic lipid metabolism are important contributors to cardiovascular complications of obesity...
January 13, 2018: Journal of Internal Medicine
https://www.readbyqxmd.com/read/29330151/interleukin-22-reverses-human-islet-dysfunction-and-apoptosis-triggered-by-hyperglycemia-and-light
#6
Shadab Abadpour, Bente Halvorsen, Afaf Sahraoui, Olle Korsgren, Pål Aukrust, Hanne Scholz
Interleukin (IL)-22 has recently been suggested as an anti-inflammatory cytokine that could protect the islet cells from inflammation- and glucose-induced toxicity. We have previously shown that the tumor necrosis factor family member, LIGHT can impair human islet function at least partly via pro-apoptotic effects. Herein, we aimed to investigate the protective role of IL-22 on human islets exposed to the combination of hyperglycemia and LIGHT. First, we found up-regulation of LIGHT receptors (LTβR and HVEM) in engrafted human islets exposed to hyperglycemia (>11 mM) for 17 days post transplantation by using a double islet transplantation mouse model as well as in human islets cultured with high glucose (HG) (20mM glucose) + LIGHT in vitro and this latter effect was attenuated by IL-22...
January 12, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29330040/yod1-attenuates-neurogenic-proteotoxicity-through-its-deubiquitinating-activity
#7
Kunikazu Tanji, Fumiaki Mori, Yasuo Miki, Jun Utsumi, Hidenao Sasaki, Akiyoshi Kakita, Hitoshi Takahashi, Koichi Wakabayashi
Ubiquitination, a fundamental post-translational modification of intracellular proteins, is enzymatically reversed by deubiquitinase enzymes (deubiquitinases). >90 deubiquitinases have been identified. One of these enzymes, YOD1, possesses deubiquitinase activity and is similar to ovarian tumor domain-containing protein 1, which is associated with regulation of the endoplasmic reticulum (ER)-associated degradation pathway. Indeed, YOD1 is reported to be involved in the ER stress response induced by mislocalization of unfolded proteins in mammalian cells...
January 10, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29329795/omega-3-fatty-acids-and-adipose-tissue-biology
#8
REVIEW
Ondrej Kuda, Martin Rossmeisl, Jan Kopecky
This review provides evidence for the importance of white and brown adipose tissue (i.e. WAT and BAT) function for the maintenance of healthy metabolic phenotype and its preservation in response to omega-3 polyunsaturated fatty acids (omega-3 PUFA), namely in the context of diseased states linked to aberrant accumulation of body fat, systemic low-grade inflammation, dyslipidemia and insulin resistance. More specifically, the review deals with (i) the concept of immunometabolism, i.e. how adipose-resident immune cells and adipocytes affect each other and define the immune-metabolic interface; and (ii) the characteristic features of "healthy adipocytes" in WAT, which are relatively small fat cells endowed with a high capacity for mitochondrial oxidative phosphorylation, triacylglycerol/fatty acid (TAG/FA) cycling and de novo lipogenesis (DNL)...
January 9, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29329780/oncogenic-rac1-and-nras-drive-resistance-to-endoplasmic-reticulum-stress-through-mek-erk-signalling
#9
Michael D Bright, Paul A Clarke, Paul Workman, Faith E Davies
Cancer cells are able to survive under conditions that cause endoplasmic reticulum stress (ER-stress), and can adapt to this stress by upregulating cell-survival signalling pathways and down-regulating apoptotic pathways. The cellular response to ER-stress is controlled by the unfolded protein response (UPR). Small Rho family GTPases are linked to many cell responses including cell growth and apoptosis. In this study, we investigate the function of small GTPases in cell survival under ER-stress. Using siRNA screening we identify that RAC1 promotes cell survival under ER-stress in cells with an oncogenic N92I RAC1 mutation...
January 9, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29329458/three-fatty-acyl-coenzyme-a-reductases-bdfar1-bdfar2-and-bdfar3-are-involved-in-primary-alcohols-biosynthesis-of-cuticular-wax-in-brachypodium-distachyon
#10
Yong Wang, Yulin Sun, Qiuye You, Wenqiao Luo, Cong Wang, Shuai Zhao, Guaiqiang Chai, Tingting Li, Xue Shi, Chunlian Li, Reinhard Jetter, Zhonghua Wang
Plant cuticular wax is a heterogeneous mixture of very-long-chain fatty acids (VLCFAs) and their derivatives. Primary alcohols are the dominant wax components throughout leaf development of Brachypodium distachyon (Brachypodium). However, the genes involved in primary alcohols biosynthesis have not been investigated and their exact biological function remains currently unclear in Brachypodium to date. Here, we monitored the leaf wax profile and crystal morphology during Brachypodium leaf morphogenesis, and isolated three Brachypodium fatty acyl-CoA reductase (FAR) genes, named BdFAR1, BdFAR2 and BdFAR3, then analyzed their biochemical activities, substrate specificities, expression patterns, subcellular localization, and stress induction...
January 9, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29329354/palmitate-induced-er-stress-and-inhibition-of-protein-synthesis-in-cultured-myotubes-does-not-require-toll-like-receptor-4
#11
Ben D Perry, Jill A Rahnert, Yang Xie, Bin Zheng, Myra E Woodworth-Hobbs, S Russ Price
Saturated fatty acids, such as palmitate, are elevated in metabolically dysfunctional conditions like type 2 diabetes mellitus. Palmitate has been shown to impair insulin sensitivity and suppress protein synthesis while upregulating proteolytic systems in skeletal muscle. Increased sarco/endoplasmic reticulum (ER) stress and subsequent activation of the unfolded protein response may contribute to the palmitate-induced impairment of muscle protein synthesis. In some cell types, ER stress occurs through activation of the Toll-like receptor 4 (TLR4)...
2018: PloS One
https://www.readbyqxmd.com/read/29328656/design-and-synthesis-of-novel-reactive-oxygen-species-inducers-for-the-treatment-of-pancreatic-ductal-adenocarcinoma
#12
Yuting Kuang, Mario Sechi, Salvatore Nurra, Mats Ljungman, Nouri Neamati
Altering redox homeostasis provides distinctive therapeutic opportunities for the treatment of pancreatic cancer. Quinazolinediones (QDs) are novel redox modulators that we previously showed to induce potent growth inhibition in pancreatic ductal adenocarcinoma (PDAC) cell lines. Our lead optimization campaign yielded QD325 as the most potent redox modulator candidate inducing substantial reactive oxygen species (ROS) in PDAC cells. Nascent RNA sequencing following treatments with the QD compounds revealed induction of stress responses in nucleus, endoplasmic reticulum, and mitochondria of pancreatic cancer cells...
January 12, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29328482/cytisine-induces-endoplasmic-reticulum-stress-caused-by-calcium-overload-in-hepg2-cells
#13
Lei Yu, Bo Jiang, Zhifeng Chen, Xin Wang, Dongxue Shang, Xiaopo Zhang, Yongxue Sun, Jinghui Yang, Yubin Ji
Cytisine, a quinolizidine alkaloid, is one of the major bioactive components found in the small tree Sophora Alopecuraides L., and is a traditional Chinese medicine that is used for treating hepatitis and liver cancer. In the 1960s, quinolizidine alkaloids were reported to exhibit inhibitory effects on tumour cell proliferation in several types of cancer cells. However, few studies have investigated the effect of cytisine on liver cancer. Our team confirmed that cytisine induced apoptosis in HepG2 cells via a mitochondrial pathway...
January 8, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29328423/cetuximab-enhances-cisplatin-induced-endoplasmic-reticulum-stress-associated-apoptosis-in-laryngeal-squamous-cell-carcinoma-cells-by-inhibiting-expression-of-txndc5
#14
Fusen Peng, Hailin Zhang, Youhong Du, Pingqing Tan
Cisplatin and cetuximab, an anti‑epidermal growth factor receptor (EGFR) monoclonal humanized antibody, have been used for treatment of laryngeal squamous cell carcinoma (LSCC). It has been demonstrated that cisplatin and inhibition of EGFR signaling may induce endoplasmic reticulum (ER) stress‑associated apoptosis. However, ER protein thioredoxin domain‑containing protein 5 (TXNDC5) reportedly protects cells from ER stress‑associated apoptosis. The present study investigated the interaction between cisplatin, cetuximab and TXNDC5 on ER stress‑associated apoptosis in LSCC cells...
January 5, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29327364/4-phenylbutyric-acid-presents-therapeutic-effect-on-osteoarthritis-via-inhibiting-cell-apoptosis-and-inflammatory-response-induced-by-endoplasmic-reticulum-stress
#15
Yang-Hua Tang, Zhen-Shuang Yue, Wen-Jie Zheng, Hong-Fei Shen, Lin-Ru Zeng, Zhong-Qing Hu, Zhen-Fei Xiong
Osteoarthritis (OA) is a common bone and joint disease with a wild range of risk factors, which is associated with endoplasmic reticulum (ER) stress. The aim of our study was to discuss the possible mechanism of ER stress associated with OA in vivo and explore novel therapeutic method against OA. OA-induced damages in cartilage tissues were evaluated by HE, Safranin O/fast green and TUNEL staining. The inflammatory factors concentration and the expression of FAP, MMP2, MMP9, Bax, Bcl-2, CHOP and GRP78 were evaluated by ELISA, real-time PCR and western blot analysis...
January 11, 2018: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/29326975/identifying-the-substrate-proteins-of-u-box-e3s-e4b-and-chip-by-orthogonal-ubiquitin-transfer
#16
Karan Bhuripanyo, Yiyang Wang, Xianpeng Liu, Li Zhou, Ruochuan Liu, Duc Duong, Bo Zhao, Yingtao Bi, Han Zhou, Geng Chen, Nicholas T Seyfried, Walter J Chazin, Hiroaki Kiyokawa, Jun Yin
E3 ubiquitin (UB) ligases E4B and carboxyl terminus of Hsc70-interacting protein (CHIP) use a common U-box motif to transfer UB from E1 and E2 enzymes to their substrate proteins and regulate diverse cellular processes. To profile their ubiquitination targets in the cell, we used phage display to engineer E2-E4B and E2-CHIP pairs that were free of cross-reactivity with the native UB transfer cascades. We then used the engineered E2-E3 pairs to construct "orthogonal UB transfer (OUT)" cascades so that a mutant UB (xUB) could be exclusively used by the engineered E4B or CHIP to label their substrate proteins...
January 2018: Science Advances
https://www.readbyqxmd.com/read/29324796/quercetin-and-aconitine-synergistically-induces-the-human-cervical-carcinoma-hela-cell-apoptosis-via-endoplasmic-reticulum-er-stress-pathway
#17
Xiu-Mei Li, Jing Liu, Fang-Fang Pan, Dong-Dong Shi, Zhi-Guo Wen, Pei-Long Yang
Up till now, studies have not been conducted on how the combination of Quercetin (Q), Aconitine (A) and apoptosis induction affects human cervical carcinoma HeLa cells. The result of our findings shows that the combination of Q and A (QA) is capable of synergistically inhibiting the proliferation of HeLa cells in a number of concentrations. QA synergistically inhibits the proliferation of MDR1 gene in the HeLa cells. It is concluded based on our result that QA induces apoptosis and ER stress just as QA-induced ER stress pathway may mediate apoptosis by upregulating mRNA expression levels of eIF2α, ATF4, IRE1, XBP1, ATF6, PERK and CHOP in the HeLa cells...
2018: PloS One
https://www.readbyqxmd.com/read/29324503/%C3%AE-asarone-alleviated-chronic-constriction-injury-induced-neuropathic-pain-through-inhibition-of-spinal-endoplasmic-reticulum-stress-in-an-liver-x-receptor-dependent-manner
#18
Yulong Gui, Aiyuan Li, Jie Zhang, Guan Li, Xia Ruan, Qulian Guo, Wangyuan Zou
BACKGROUND: Neuropathic pain is an intractable and complex disease. Recent studies have shown a close relationship between endoplasmic reticulum (ER) stress and neuropathic pain. Here, we investigated the effect of α-asarone, an ER stress inhibitor, on chronic constriction injury (CCI)-induced neuropathic pain. METHODS: Two parts were included in this study. In part 1, rats were assigned to 7 groups: the sham group, the sham + α-asarone 20 mg/kg group, the CCI group, the CCI + vehicle group, the CCI + α-asarone 5 mg/kg group, the CCI + α-asarone 10 mg/kg group, and the CCI + α-asarone 20 mg/kg group...
January 9, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29324356/inflammation-induced-er-stress-affects-absorptive-intestinal-epithelial-cells-function-and-integrity
#19
Sucheera Chotikatum, Hassan Y Naim, Nahed El-Najjar
Recent studies have linked impairment of intestinal epithelial function in inflammatory bowel disease to the disturbance of endoplasmic reticulum homeostasis (ER) in response to stress. Most studies are on goblet and Paneth cells, which are considered more susceptible to stress due to their role in the protection of intestinal epithelium against microbes and harmful substances. However, studies on the role of inflammation-induced ER stress in absorptive intestinal cells are scarce. In this study, we show, using Caco-2 cells as a model of intestinal epithelial barrier, that inducing ER stress using a cocktail mixture of pro-inflammatory mediators [TNFα (50ng/ml), MCP1 (50ng/ml), and IL-1β (25ng/ml)] as observed in IBD patients induces ER stress and leads to significant changes in key proteins of the apical (sucrase-isomaltase (SI), dipeptidyl-peptidase (DPPIV), and ezrin) and basolateral (E-cadherin, zonula occludens (ZO-1), and connexin-43) membranes...
January 8, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29323786/pulmonary-endoplasmic-reticulum-stress-scars-smoke-and-suffocation
#20
REVIEW
Jennifer A Dickens, Elke Malzer, Joseph E Chambers, Stefan J Marciniak
Protein misfolding within the endoplasmic reticulum (ER stress) can be a cause or consequence of pulmonary disease. Mutation of proteins restricted to the alveolar type II pneumocyte can lead to inherited forms of pulmonary fibrosis, but even sporadic cases of pulmonary fibrosis appear to be strongly associated with activation of the unfolded protein response (UPR) and/or the integrated stress response (ISR). Inhalation of smoke can impair protein folding and may be an important cause of pulmonary ER stress...
January 11, 2018: FEBS Journal
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