Functional roles of SIRT1 in the differentiation of neural cells

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We found that SIRT1, an homologue of yeast longevity gene Sir2, bound and deacetylated p300, a co-activator for Notch-intracellular domain, resulting in the ubiquitination and degradation of p300. We found that SIRT1 promoted neurite formation and extension ofPC12 pheochromocytoma cells. We also found that SIRT1 was necessary for lamellipodium formation and migration of B16F1 melanoma cells. Because melanoma cells are derived from neural crest cells, similar mechanism may regulate neural cell migration.