| First Author | Rohrer B | Year | 2003 |
| Journal | Exp Eye Res | Volume | 76 |
| Issue | 1 | Pages | 125-9 |
| PubMed ID | 12589782 | Mgi Jnum | J:115542 |
| Mgi Id | MGI:3691910 | Doi | 10.1016/s0014-4835(02)00258-0 |
| Citation | Rohrer B, et al. (2003) Lack of p75 receptor does not protect photoreceptors from light-induced cell death. Exp Eye Res 76(1):125-9 |
| abstractText | 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. |
