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p21(Cip1/WAF1) has cell cycle inhibitory activity by binding to and inhibiting both cyclin/Cdk kinases and proliferating cell nuclear antigen. Here we show that p21(Cip1/WAF1) is induced in the cytoplasm during the course of differentiation of chick retinal precursor cells and N1E-115 cells. Ectopic expression of p21(Cip1/WAF1) lacking the nuclear localization signal in N1E-115 cells and NIH3T3 cells affects the formation of actin structures, characteristic of inactivation of Rho. p21(Cip1/WAF1) forms a complex with Rho-kinase and inhibits its activity in vitro and in vivo. Neurite outgrowth and branching from the hippocampal neurons are promoted if p21(Cip1/WAF1) is expressed abundantly in the cytoplasm. These results suggest that cytoplasmic p21(Cip1/WAF1) may contribute to the developmental process of the newborn neurons that extend axons and dendrites into target regions.
Pubmed ID: 12119358 RIS Download
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Cell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)
View all literature mentionsCell line NIH 3T3 is a Spontaneously immortalized cell line with a species of origin Mus musculus
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