References
Query Results -- Details
MGI Accession ID: MGI:3691910
J Number: J:115542
Other Accession IDs:
Title: Lack of p75 receptor does not protect photoreceptors from light-induced cell death.
Authors: Rohrer B; Matthes MT; LaVail MM; Reichardt LF
Journal: Exp Eye Res
Volume: 76
Issue: 1
Date: 2003 Jan
Year: 2003
Pages: 125-9
Review Status: Peer Reviewed
Abstract:
Rod photoreceptors are susceptible to light-induced cell death. Previous results have suggested that the neurotrophin receptor p75 in Muller cells controls photoreceptor cell death during light-exposure by suppressing trophic factor release; and consequently, if p75 is blocked or eliminated during light-exposure, apoptosis is delayed. We explored this question by examining photoreceptor cell survival in albino p75(-/-) mice as well as their heterozygous and homozygous littermates. Photoreceptor cell death was examined in semi-thin sections by counting the remaining rows of photoreceptors. No difference in the amount of cell death was found between p75(+/+) and p75(-/-) animals, whereas the single copy of p75 in the heterozygous p75(+/-) mice provided significant neuroprotection. Cell death in the wild-type animals may indeed be mediated by p75, whereas other known apoptosis pathways may be activated in the p75(-/-) mice. The pro-apoptotic activity of the p75 receptor may have been partially suppressed in the heterozygous p75(+/-) mice by the silencing effect of the Trk receptor. Thus, our results suggest that p75 signaling does not mediate the main apoptosis pathway activated during light-damage.
Additional Information:
