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Early nuclear exclusion of the transcription factor max is associated with retinal ganglion cell death independent of caspase activity.

Authors: Petrs-Silva, H  De Freitas, FG  Linden, R  Chiarini, LB 
Citation: Petrs-Silva H, etal., J Cell Physiol. 2004 Feb;198(2):179-87.
Pubmed: (View Article at PubMed) PMID:14603520
DOI: Full-text: DOI:10.1002/jcp.10404

We examined the behavior of the transcription factor Max during retrograde neuronal degeneration of retinal ganglion cells. Using immunohistochemistry, we found a progressive redistribution of full-length Max from the nucleus to the cytoplasm and dendrites of the ganglion cells following axon damage. Then, the axotomized cells lose all their content of Max, while undergoing nuclear pyknosis and apoptotic cell death. After treatment of retinal explants with either anisomycin or thapsigargin, the rate of nuclear exclusion of Max accompanied the rate of cell death as modulated by either drug. Treatment with a pan-caspase inhibitor abolished both TUNEL staining and immunoreactivity for activated caspase-3, but did not affect the subcellular redistribution of Max immunoreactivity after axotomy. The data show that nuclear exclusion of the transcription factor Max is an early event, which precedes and is independent of the activation of caspases, during apoptotic cell death in the central nervous system.

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CRRD Object Information
CRRD ID: 2316820
Created: 2010-02-25
Species: All species
Last Modified: 2010-02-25
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.