作者: Z N Demidenko , S Kalurupalle , C Hanko , C-u Lim , E Broude
DOI: 10.1038/ONC.2008.82
关键词: Immunology 、 Cell cycle 、 Growth factor receptor 、 Microtubule 、 Cell fate determination 、 Interphase 、 Carcinogenesis 、 Cell biology 、 Mitosis 、 Apoptosis 、 Biology
摘要: Paclitaxel (PTX) and other microtubule inhibitors cause mitotic arrest. However, low concentrations of PTX (low PTX) paradoxically G1 arrest (without arrest). Here, we demonstrated that unexpectedly, did not in the first cell cycle prevent cells from passing through S phase entering mitosis. Mitosis was prolonged but still divided, producing either two or three (tripolar mitosis), thus explaining a sub peak caused by PTX. Importantly, were viable non-apoptotic. Some fused back then progressed to mitosis, frequently again before becoming arrested next cell-cycle interphase. Thus, postmitotic second even third cycles. By increasing concentration PTX, tripolar mitosis transformed slippage, eliminating peak. Time-lapse microscopy revealed ensured p53-dependent We conclude directly affects only duration determines fate, including G1-like