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Hsp20 Protects against Oxygen-Glucose Deprivation/Reperfusion-Induced Golgi Fragmentation and Apoptosis through

Bingwu Zhong1, Zhiping Hu2, Jieqiong Tan3

  • 1Department of Neurology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China ; Department of Traditional Chinese Medicine, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.

Oxidative Medicine and Cellular Longevity
|July 23, 2015
PubMed

Insights

Heat shock protein 20 (Hsp20) protects brain cells from damage after stroke. It prevents Golgi apparatus fragmentation and cell death by interacting with key proteins in the Fas/FasL pathway.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Cerebral ischemia-reperfusion injury is a major cause of tissue damage in acute ischemic stroke.
  • Protecting the Golgi apparatus (GA) is a promising therapeutic target for stroke treatment.
  • Heat shock protein 20 (Hsp20) exhibits cytoprotective properties and chaperone-like activity.

Purpose of the Study:

  • To investigate the protective effects of Hsp20 on the Golgi apparatus in a cerebral ischemia-reperfusion injury model.
  • To elucidate the underlying molecular mechanisms of Hsp20's neuroprotection.

Main Methods:

  • Mouse neuroblastoma Neuro2a (N2a) cells were subjected to oxygen-glucose deprivation/reperfusion (OGDR) insult.
  • Hsp20 expression was modulated via transfection.
  • Golgi fragmentation, apoptosis, protein expression (Bax, FasL), and caspase cleavage were assessed.

Main Results:

  • OGDR induced Golgi fragmentation, apoptosis, and p115 cleavage in N2a cells.
  • Hsp20 transfection significantly attenuated OGDR-induced Golgi fragmentation and apoptosis.
  • Hsp20 interacted with Bax, reduced FasL and Bax expression, and inhibited caspase-3 and p115 cleavage.

Conclusions:

  • Hsp20 exhibits significant neuroprotective effects against OGDR-induced Golgi fragmentation and apoptosis.
  • Hsp20 likely protects the Golgi apparatus by interacting with Bax and modulating the Fas/FasL signaling pathway, thereby reducing p115 cleavage.
  • These findings suggest Hsp20's potential clinical application in treating cerebral ischemia-reperfusion disorders.

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