کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1926669 | 1536473 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The flavonoid fisetin promotes nerve cell survival from trophic factor withdrawal by enhancement of proteasome activity The flavonoid fisetin promotes nerve cell survival from trophic factor withdrawal by enhancement of proteasome activity](/preview/png/1926669.png)
To explore the possibility that specific flavonoids can substitute for neurotrophic factors, we examined the ability of the flavonol fisetin and several related flavonoids to support the survival of low density, serum-free cultures of rat cortical neurons. Normally these cells die within 24 h in the absence of trophic factors but in the presence of fisetin and several related flavonoids the cells survive and produce long neurites. While the survival-promoting effect of several of the fisetin-related flavonoids was partially dependent on ERK activation, the effect of fisetin was not. Fisetin can enhance glutathione synthesis but the survival-promoting effect of fisetin was also not dependent on glutathione. However, proteasome inhibitors almost completely blocked the ability of fisetin to promote survival. Consistent with this observation, fisetin increased proteasome activity. Together these results demonstrate a new activity for fisetin and tie this activity to its neurotrophic effects.
Journal: Archives of Biochemistry and Biophysics - Volume 476, Issue 2, 15 August 2008, Pages 139–144