Gary M Fiskum

Publication Detail

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Inhibition of mitochondrial neural cell death pathways by protein transduction of Bcl-2 family proteins.

Lucian Soane; Gary Fiskum (Profiled Author: Gary M Fiskum)

Department of Anesthesiology, School of Medicine, University of Maryland, 685 W. Baltimore Street, Baltimore, MD 21201, USA.
Journal of bioenergetics and biomembranes 2005;37(3):179-90.

Bcl-2 and other closely related members of the Bcl-2 family of proteins inhibit the death of neurons and many other cells in response to a wide variety of pathogenic stimuli. Bcl-2 inhibition of apoptosis is mediated by its binding to pro-apoptotic proteins, e.g., Bax and tBid, inhibition of their oligomerization, and thus inhibition of mitochondrial outer membrane pore formation, through which other pro-apoptotic proteins, e.g., cytochrome c, are released to the cytosol. Bcl-2 also exhibits an indirect antioxidant activity caused by a sub-toxic elevation of mitochondrial production of reactive oxygen species and a compensatory increase in expression of antioxidant gene products. While classic approaches to cytoprotection based on Bcl-2 family gene delivery have significant limitations, cellular protein transduction represents a new and exciting approach utilizing peptides and proteins as drugs with intracellular targets. The mechanism by which proteins with transduction domains are taken up by cells and delivered to their targets is controversial but usually involves endocytosis. The effectiveness of transduced proteins may therefore be limited by their release from endosomes into the cytosol.

2 Originating Grant

• 1.

  Fiskum, Gary M

  Novel delivery of Bcl-2 for neuroprotection

  1 December 2002 - 30 November 2005

  NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE

• 2.

  Fiskum, Gary

  Molecular Mechanisms of Ischemia Reperfusion Brain Injury

  1 May 1995 - 31 December 2008

  NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE

Scientific Context

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