Dietary (-)-epicatechin mitigates high fat-induced apoptosis, oxidative and endoplasmic reticulum stress in pancreatic β-cells both in vivo and in vitro

2021 ◽  
Vol 165 ◽  
pp. 44
Author(s):  
Eleonora Cremonini ◽  
Maëlys Rouget ◽  
Solenne Arredi ◽  
Charlotte Devulder-Mercier ◽  
Robin Cellier ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Endoplasmic Reticulum Stress ◽  
High Fat ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Induced Apoptosis

Pannexin-2-deficiency sensitizes pancreatic β-cells to cytokine-induced apoptosis in vitro and impairs glucose tolerance in vivo

2017 ◽  
Vol 448 ◽  
pp. 108-121 ◽  
Author(s):  
Lukas A. Berchtold ◽  
Michela Miani ◽  
Thi A. Diep ◽  
Andreas N. Madsen ◽  
Valentina Cigliola ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Induced Apoptosis

scholarly journals Protection of pancreatic β-cells by exendin-4 may involve the reduction of endoplasmic reticulum stress; in vivo and in vitro studies

2007 ◽  
Vol 193 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Shin Tsunekawa ◽  
Naoki Yamamoto ◽  
Katsura Tsukamoto ◽  
Yuji Itoh ◽  
Yukiko Kaneko ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Cell Death ◽  
Er Stress ◽  
Islet Cells ◽  
Binding Protein ◽  
Β Cells ◽  
Β Cell ◽  
Pancreatic Β Cells

The aim of this study was to investigate the in vivo and in vitro effects of exendin-4, a potent glucagon-like peptide 1 agonist, on the protection of the pancreatic β-cells against their cell death. In in vivo experiments, we used β-cell-specific calmodulin-overexpressing mice where massive apoptosis takes place in their β-cells, and we examined the effects of chronic treatment with exendin-4. Chronic and s.c. administration of exendin-4 reduced hyperglycemia. The treatment caused significant increases of the insulin contents of the pancreas and islets, and retained the insulin-positive area. Dispersed transgenic islet cells lived only shortly, and several endoplasmic reticulum (ER) stress-related molecules such as immunoglobulin-binding protein (Bip), inositol-requiring enzyme-1α, X-box-binding protein-1 (XBP-1), RNA-activated protein kinase-like endoplasmic reticulum kinase, activating transcription factor-4, and C/EBP-homologous protein (CHOP) were more expressed in the transgenic islets. We also found that the spliced form of XBP-1, a marker of ER stress, was also increased in β-cell-specific calmodulin-overexpressing transgenic islets. In the quantitative real-time PCR analyses, the expression levels of Bip and CHOP were reduced in the islets from the transgenic mice treated with exendin-4. These findings suggest that excess of ER stress occurs in the transgenic β-cells, and the suppression of ER stress and resultant protection against cell death may be involved in the anti-diabetic effects of exendin-4.

scholarly journals Anks4b, a Novel Target of HNF4α Protein, Interacts with GRP78 Protein and Regulates Endoplasmic Reticulum Stress-induced Apoptosis in Pancreatic β-Cells

2012 ◽  
Vol 287 (27) ◽  
pp. 23236-23245 ◽  
Author(s):  
Yoshifumi Sato ◽  
Mitsutoki Hatta ◽  
Md. Fazlul Karim ◽  
Tomohiro Sawa ◽  
Fan-Yan Wei ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Endoplasmic Reticulum Stress ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Novel Target ◽  
Induced Apoptosis

Cinnamtannin D1 Protects Pancreatic β-Cells from Glucolipotoxicity-Induced Apoptosis by Enhancement of Autophagy In Vitro and In Vivo

2020 ◽  
Vol 68 (45) ◽  
pp. 12617-12630
Author(s):  
Xin-Yi Wang ◽  
Bo-Rong Zhu ◽  
Qi Jia ◽  
Yi-Ming Li ◽  
Ting Wang ◽  
...  
Keyword(s):  
Β Cells ◽  
Pancreatic Β Cells ◽  
Induced Apoptosis

scholarly journals Involvement of Endoplasmic Reticulum Stress in Capsaicin-Induced Apoptosis of Human Pancreatic Cancer Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Shengzhang Lin ◽  
Jianhong Zhang ◽  
Hui Chen ◽  
Kangjie Chen ◽  
Fuji Lai ◽  
...  
Keyword(s):  
Pancreatic Cancer ◽  
Endoplasmic Reticulum ◽  
Endoplasmic Reticulum Stress ◽  
Cancer Cells ◽  
Human Pancreatic Cancer ◽  
Dependent Manner ◽  
Pancreatic Cancer Cells ◽  
Induced Apoptosis

Capsaicin, main pungent ingredient of hot chilli peppers, has been shown to have anticarcinogenic effect on various cancer cells through multiple mechanisms. In this study, we investigated the apoptotic effect of capsaicin on human pancreatic cancer cells in bothin vitroandin vivosystems, as well as the possible mechanisms involved.In vitro, treatment of both the pancreatic cancer cells (PANC-1 and SW1990) with capsaicin resulted in cells growth inhibition, G0/G1 phase arrest, and apoptosis in a dose-dependent manner. Knockdown of growth arrest- and DNA damage-inducible gene 153 (GADD153), a marker of the endoplasmic-reticulum-stress- (ERS-) mediated apoptosis pathway, by specific siRNA attenuated capsaicin-induced apoptosis both in PANC-1 and SW1990 cells. Moreover,in vivostudies capsaicin effectively inhibited the growth and metabolism of pancreatic cancer and prolonged the survival time of pancreatic cancer xenograft tumor-induced mice. Furthermore, capsaicin increased the expression of some key ERS markers, including glucose-regulated protein 78 (GRP78), phosphoprotein kinase-like endoplasmic reticulum kinase (phosphoPERK), and phosphoeukaryotic initiation factor-2α(phospho-eIF2α), activating transcription factor 4 (ATF4) and GADD153 in tumor tissues. In conclusion, we for the first time provide important evidence to support the involvement of ERS in the induction of apoptosis in pancreatic cancer cells by capsaicin.

scholarly journals Treatment With Naringenin Elevates the Activity of Transcription Factor Nrf2 to Protect Pancreatic β-Cells From Streptozotocin-Induced Diabetes in vitro and in vivo

2019 ◽  
Vol 9 ◽  
Author(s):  
Rashmi Rajappa ◽  
Dornadula Sireesh ◽  
Magesh B. Salai ◽  
Kunka M. Ramkumar ◽  
Suryanarayanan Sarvajayakesavulu ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Streptozotocin Induced Diabetes
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