Autophagy in acute brain injury: Feast, famine, or folly?

Craig M. Smith, Yaming Chen, Mara L. Sullivan, Patrick M. Kochanek, Robert S B Clark

Research output: Contribution to journalReview article

75 Scopus citations

Abstract

In the central nervous system, increased autophagy has now been reported after traumatic brain and spinal cord injury, cerebral ischemia, intracerebral hemorrhage, and seizures. This increase in autophagy could be physiologic, converting damaged or dysfunctional proteins, lipids, and/or organelles to their amino acid and fatty acid components for recycling. On the other hand, this increase in autophagy could be supraphysiologic, perhaps consuming and eliminating functional proteins, lipids, and/or organelles as well. Whether an increase in autophagy is beneficial (feast) or detrimental (famine) in brain likely depends on both the burden of intracellular substrate targeted for autophagy and the capacity of the cell's autophagic machinery. Of course, increased autophagy observed after brain injury could also simply be an epiphenomenon (folly). These divergent possibilities have clear ramifications for designing therapeutic strategies targeting autophagy after acute brain injury and are the subject of this review. This article is part of a Special Issue entitled "Autophagy and protein degradation in neurological diseases.

Original languageEnglish (US)
Pages (from-to)52-59
Number of pages8
JournalNeurobiology of Disease
Volume43
Issue number1
DOIs
StatePublished - Jul 1 2011

Keywords

  • Autophagic stress
  • Autophagosome
  • Hypoxia-ischemia
  • Lipophagy
  • Mitophagy
  • Traumatic brain injury

ASJC Scopus subject areas

  • Neurology

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