Obesity Exacerbates Rat Cerebral Ischemic Injury through Enhancing Ischemic Adiponectin-Containing Neuronal Apoptosis

Ming Hsiu Wu, Chung Ching Chio, Kuen Jer Tsai, Ching Ping Chang, Nan Kai Lin, Chao Ching Huang, Mao Tsun Lin

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A diet consisting of high levels of saturated fat has been linked to a dramatic rise in obesity. Long-term exposure to high fat, “Western diet” (WD), is detrimental to ischemic brain injury. Adiponectin receptor 1 (ADR-1) activation is also shown to exacerbate ischemic neuronal death. However, it is not known whether increasing percentages of adiponectin (APN)-containing neurons attenuates ischemic neuronal apoptosis by modulating ADRS. To explore the role of APN and its ADRs in the development of acute cerebral injury, we subjected WD and control diet (CD) rats to 1 h of middle cerebral artery occlusion followed by 23 h of reperfusion. Compared with CD rats, WD rats exhibited higher levels of brain infarct, neurologic deficits, brain edema, and apoptosis of APN-containing neurons; upregulation of both ADR-1 and P38 mitogen-activated protein kinase (P38MAPK); and downregulation of ADR-2 in ischemic brain tissues including frontal cortex, striatum, and hippocampus. Increasing percentages of APN-containing neurons by baculovirus-mediated administration of APN, in addition to reducing apoptosis of APN-containing neurons in ischemic brain tissues, significantly attenuated brain infarct and edema, neurologic deficits, and altered expression of ADR-1, P38MAPK, and ADR-2 in both WD and CD group rats. These data suggest a negative correlation between percentages of APN-containing neurons and cerebral ischemic injury. Obesity could exacerbate rat cerebral ischemic injury by enhancing apoptosis of APN-containing neurons in ischemic brain tissues probably via modulating ADRs and P38MAPK.

Original languageEnglish
Pages (from-to)3702-3713
JournalMolecular Neurobiology
Volume53
Issue number6
DOIs
Publication statusPublished - Aug 1 2016

Keywords

  • Adiponectin
  • Cerebral ischemia
  • Obesity
  • P38 mitogen-activated protein kinase
  • Stroke

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience

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