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Total 1410 results found since Jan 2013.
Cell surface GRP78 regulates TGF β1-mediated profibrotic responses via TSP1 in diabetic kidney disease
Discussion: These data support an important role for csGRP78 in regulating HG-induced TSP1 transcriptional induction via PI3K/Akt signaling. Functionally, this enables TGFβ1 activation in response to HG, with consequent increase in ECM proteins. Means of inhibiting csGRP78 signaling represent a novel approach to preventing fibrosis in DKD.
Source: Frontiers in Pharmacology - February 24, 2023 Category: Drugs & Pharmacology Source Type: research
Herpud1 modulates hypertrophic signals independently of calmodulin nuclear translocation in rat myocardium-derived H9C2 cells
In this study, we aimed to analyze the role of the Homocysteine-responsive endoplasmic reticulum-resident ubiquitin-like domain member 1 (Herpud1) gene in the development of cardiomyocyte hypertrophy in association with Calmodulin (CaM) nuclear translocation and cytosolic Ca2+ levels. To observe the mobilization of CaM in cardiomyocytes, we stably expressed eGFP-CaM in rat myocardium-derived H9C2 cells. These cells were then treated with Angiotensin II (Ang II), which stimulates a cardiac hypertrophic response, or dantrolene (DAN), which blocks the release of intracellular Ca2+. To observe intracellular Ca2+ in the presenc...
Source: Biochemical and Biophysical Research communications - February 22, 2023 Category: Biochemistry Authors: Riko Fujioka Takeshi Yamamoto Akihiro Maruta Yoshihide Nakamura Naoomi Tominaga Masako Inamitsu Tetsuro Oda Shigeki Kobayashi Masafumi Yano Source Type: research
The Weakened Interaction Between HECTD4 and GluN2B in Ischemic Stroke Promotes Calcium Overload and Brain Injury Through a Mechanism Involving the Decrease of GluN2B and MALT1 Ubiquitination
This study explores the relationship between HECTD4, GluN2B, and MALT1, focusing on their role in brain injury in ischemic stroke. Rats were subjected to 2 h-ischemia followed by 24-h reperfusion to establish an ischemic stroke model. We observed the downregulation of HECTD4 and the upregulation of MALT1. Additionally, an increased GluN2B phosphorylation was concomitant with weakened interactions between HECTD4 and GluN2B, followed by decreased stria tal-enriched protein phosphatase (STEP61). Knockdown of HECTD4 exacerbated hypoxia- or NMDA-induced injury in nerve cells coincident with a decrease in GluN2B and MALT1 ubiq...
Source: Molecular Neurobiology - February 4, 2023 Category: Neurology Source Type: research
SARS-COV-2 spike protein promotes RPE cell senescence via the ROS/P53/P21 pathway
In conclusions, the S-protein of SARS-Cov-2 induces cellular senescence of ARPE-19 cells in vitro and the expression of senescence-associated cytokines in zebrafish retina in vivo likely by activating ER stress, ROS, and NF-κb. These results may uncover a potential association between SARS-cov-2 infection and development of AMD.PMID:36738354 | PMC:PMC9898700 | DOI:10.1007/s10522-023-10019-0
Source: Biogerontology - February 4, 2023 Category: Geriatrics Authors: Yuhang Zhang Xuyan Peng Mengjiao Xue Jingjing Liu Guohui Shang Mingjun Jiang Dandan Chen Baixue Liu Yuxuan Wang Xiaolin Jia Jianqing Xu Fengyan Zhang Yanzhong Hu Source Type: research
Advanced glycation end products induce skeletal muscle atrophy and insulin resistance via activating ROS-mediated ER stress PERK/FOXO1 signaling
In this study, we investigated whether AGEs could exacerbate skeletal muscle atrophy and its related insulin resistance. Mice were exposed to AGEs. Forkhead box O1 (FOXO1) was silenced by a constructed viral vector carrying siRNA. Skeletal muscle atrophy was evaluated by H&E, oil red O, myosin skeletal heavy chain (MHC) and laminin immunofluorescent stains. Reactive oxygen species (ROS) generation was assessed by DHE stain. Western blotting was used to evaluate protein expression and phosphorylation. Insulin resistance was monitored by insulin tolerance test (ITT) and glucose infusion rate (GIR). Mice exposed to AGEs s...
Source: Am J Physiol Endocri... - February 1, 2023 Category: Endocrinology Authors: Haixia Du Yanpeng Ma Xiqiang Wang Yong Zhang Ling Zhu Shuang Shi Shuo Pan Zhongwei Liu Source Type: research
