Changes in autophagy proteins in a rat model of controlled cortical impact induced brain injury

Biochem Biophys Res Commun. 2008 Sep 5;373(4):478-81. doi: 10.1016/j.bbrc.2008.05.031. Epub 2008 May 16.

Abstract

Autophagy has been implicated in several neurodegenerative diseases and recently its role in acute brain injury has received increased interest. In our study, we investigated the profiles of autophagy-linked proteins (MAP-LC3 (Atg8), beclin-1 (Atg6) and the beclin-1-binding protein, bcl-2, following controlled cortical impact injury in rats--a model for moderate-to-severe traumatic brain injury. We observed significant increases in the levels of the processed form of LC3 (LC3-II) in the ipsilateral cortex 2h to 2 days after injury when compared to sham. Furthermore, the beclin-1/bcl-2 ratio in the ipsilateral cortex was found to have increased from 1 and 2 days after injury. Since both of these changes are established autophagy-enabling events, and, based on these data, we propose that autophagy, plays a role in the manifestation of cell injury following brain trauma.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Apoptosis Regulatory Proteins / metabolism*
  • Autophagy*
  • Beclin-1
  • Brain Injuries / metabolism*
  • Cerebral Cortex / metabolism*
  • Disease Models, Animal
  • Proto-Oncogene Proteins c-bcl-2 / metabolism*
  • Rats
  • Rats, Inbred Strains

Substances

  • Apoptosis Regulatory Proteins
  • Beclin-1
  • Becn1 protein, rat
  • Proto-Oncogene Proteins c-bcl-2