Adiponectin reduces ER stress-induced apoptosis through PPARα transcriptional regulation of ATF2 in mouse adipose

Zhenjiang Liu; Lu Gan; Tianjiao Wu; Fei Feng; Dan Luo; Huihui Gu; Shimin Liu; Chao Sun

doi:10.1038/cddis.2016.388

journal article Open Access Nov 24, 2016

Adiponectin reduces ER stress-induced apoptosis through PPARα transcriptional regulation of ATF2 in mouse adipose

Zhenjiang Liu

Lu Gan

Tianjiao Wu Fei Feng

Dan Luo

Huihui Gu Shimin Liu

Chao Sun

Cell Death & Disease Vol. 7 No. 11 pp. e2487-e2487 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/cddis.2016.388

Abstract

AbstractAdiponectin is a cytokine produced predominantly by adipose tissue and correlates with glucose and lipid homeostasis. However, the effects of adiponectin on endoplasmic reticulum (ER) stress and apoptosis of adipose tissue remain elusive. In this study, we found that tunicamycin-induced ER stress increased serum free fatty acid (FFA) and impaired glucose tolerance, elevated the mRNA levels of GRP78, Chop, ATF2 and caspase 3, but reduced adiponectin mRNA level in white adipose tissue. Moreover, ER stress-triggered adipocyte apoptosis by increasing cellular FFA level and Ca2+ level. Further analysis revealed that adiponectin alleviated ER stress-induced adipocyte apoptosis by elevating peroxisome proliferator-activated receptor alpha (PPARα) mRNA level. Our data also confirmed that adiponectin reduced early apoptotic cells and blocked the mitochondrial apoptosis pathway by activating the AdipoR1/AMP-activated protein kinase (AMPK) signal pathway. In addition, PPARα bound to ATF2 promoter region and inhibited transcription of ATF2. The inhibition of adipocyte apoptosis by adiponectin was correlated with transcriptional suppression of ATF2. Furthermore, adiponectin inhibited ER stress-induced apoptosis by activating the AMPK/PKC pathway. In summary, our data demonstrate adiponectin inhibited ER stress and apoptosis of adipocyte in vivo and in vitro by activating the AMPK/PPARα/ATF2 pathway. Our study establishes that adiponectin is an important adipocytokine for preventing and treating obesity.

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Details

Published: Nov 24, 2016
Vol/Issue: 7(11)
Pages: e2487-e2487
License: View

Authors

Guangdong Academy of Sciences

Cite This Article

Zhenjiang Liu, Lu Gan, Tianjiao Wu, et al. (2016). Adiponectin reduces ER stress-induced apoptosis through PPARα transcriptional regulation of ATF2 in mouse adipose. Cell Death & Disease, 7(11), e2487-e2487. https://doi.org/10.1038/cddis.2016.388

Adiponectin reduces ER stress-induced apoptosis through PPARα transcriptional regulation of ATF2 in mouse adipose

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