Title : Exit from arsenite-induced mitotic arrest is p53 dependent.

Pub. Date : 2006 Sep

PMID : 16966095






12 Functional Relationships(s)
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Protein Name
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1 Exit from arsenite-induced mitotic arrest is p53 dependent. arsenite tumor protein p53 Homo sapiens
2 Using a model cell line in which p53 expression is regulated exogenously in a tetracycline-off system (TR9-7 cells) , our laboratory has shown that arsenite disrupts mitosis and that p53-deficient cells [p53(-)], in contrast to p53-expressing cells [p53(+)], display greater sensitivity to arsenite-induced mitotic arrest and apoptosis. arsenite tumor protein p53 Homo sapiens
3 OBJECTIVE: Our goal was to examine the role p53 plays in protecting cells from arsenite-induced mitotic arrest. arsenite tumor protein p53 Homo sapiens
4 RESULTS: Mitotic index analysis demonstrated that arsenite treatment delayed exit from G2 in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
5 RESULTS: Mitotic index analysis demonstrated that arsenite treatment delayed exit from G2 in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
6 Arsenite-treated p53(+) cells exited mitosis normally, whereas p53(-) cells exited mitosis with delayed kinetics. arsenite tumor protein p53 Homo sapiens
7 Microarray analysis performed on mRNAs of cells exposed to arsenite for 0 and 3 hr after release from G2 phase synchrony showed that arsenite induced inhibitor of DNA binding-1 (ID1) differentially in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
8 Microarray analysis performed on mRNAs of cells exposed to arsenite for 0 and 3 hr after release from G2 phase synchrony showed that arsenite induced inhibitor of DNA binding-1 (ID1) differentially in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
9 Microarray analysis performed on mRNAs of cells exposed to arsenite for 0 and 3 hr after release from G2 phase synchrony showed that arsenite induced inhibitor of DNA binding-1 (ID1) differentially in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
10 Microarray analysis performed on mRNAs of cells exposed to arsenite for 0 and 3 hr after release from G2 phase synchrony showed that arsenite induced inhibitor of DNA binding-1 (ID1) differentially in p53(+) and p53(-) cells. arsenite tumor protein p53 Homo sapiens
11 CONCLUSIONS: p53 promotes mitotic exit and leads to more extensive ID1 induction by arsenite. arsenite tumor protein p53 Homo sapiens
12 ID1 may play a role in the survival of arsenite-treated p53(+) cells and contribute to arsenic carcinogenicity. arsenite tumor protein p53 Homo sapiens