Anti-apoptotic actions of PPAR-gamma against ischemic stroke

Mol Neurobiol. 2010 Jun;41(2-3):180-6. doi: 10.1007/s12035-010-8103-y. Epub 2010 Feb 3.

Abstract

Stroke is a leading cause of adult disability and mortality. Diabetes is a major risk factor for stroke. Patients with diabetes have a higher incidence of stroke and a poorer prognosis after stroke. Peroxisome proliferator-activated receptor gamma (PPAR-gamma) is a ligand-modulated transcriptional factor and a therapeutic target for treating type II diabetes. It is well-documented that activation of PPAR-gamma can also attenuate postischemic inflammation and damage. In this review, we focus on the newly revealed anti-apoptotic actions of PPAR-gamma against cerebral ischemia. PPAR-gamma, by increasing superoxide dismutase/catalase and decreasing nicotinamide adenine dinucleotide phosphate oxidase levels, attenuated ischemia-induced reactive oxygen species and subsequently alleviated the postischemic degradation of Bcl-2, Bcl-xl, and Akt. The preserved Akt phosphorylated Bad. Meanwhile, PPAR-gamma also promotes the transcription of 14-3-3epsilon. Elevated 14-3-3epsilon binds and sequesters p-Bad and prevents Bad translocation to neutralize the anti-apoptotic function of Bcl-2. This review further supports the notion that PPAR-gamma may serve as a potential therapeutic target for treating ischemic stroke.

Publication types

  • Review

MeSH terms

  • 14-3-3 Proteins / metabolism
  • Animals
  • Apoptosis / physiology
  • Brain Ischemia / physiopathology*
  • Brain Ischemia / therapy
  • Humans
  • Hypoglycemic Agents / therapeutic use
  • Ligands
  • PPAR gamma / agonists
  • PPAR gamma / genetics
  • PPAR gamma / metabolism*
  • Proto-Oncogene Proteins c-akt / metabolism
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • Rosiglitazone
  • Stroke / physiopathology*
  • Stroke / therapy
  • Thiazolidinediones / therapeutic use
  • bcl-Associated Death Protein / metabolism

Substances

  • 14-3-3 Proteins
  • Hypoglycemic Agents
  • Ligands
  • PPAR gamma
  • Proto-Oncogene Proteins c-bcl-2
  • Thiazolidinediones
  • YWHAE protein, human
  • bcl-Associated Death Protein
  • Rosiglitazone
  • Proto-Oncogene Proteins c-akt