RT Journal Article
SR Electronic
T1 Centrosome Impairments and Consequent Cytokinesis Defects are Possible Mechanisms of Taxane Drugs
JF Anticancer Research
JO Anticancer Res
FD International Institute of Anticancer Research
SP 1919
OP 1925
VO 25
IS 3B
A1 JUN ZHU
A1 ERIC C. BEATTIE
A1 YANG YANG
A1 HUI-JUAN WANG
A1 JAE-YOUNG SEO
A1 LI-XI YANG
YR 2005
UL http://ar.iiarjournals.org/content/25/3B/1919.abstract
AB Taxol and taxotere are two of the most promising anticancer drugs. To determine the mechanisms responsible for cell death after exposure to low doses of taxane, PC3 cells were treated with taxol and taxotere, and observed with immunofluoroscence microscopy. Pericentriolar material dissociation and blockage of normal centrosome separation were found to result in two different abnormal spindle types; multipolar and monopolar spindles, respectively. The majority of abnormal spindles induced by taxol were monopolar spindles, whereas taxotere mostly induced abnormal multipolar spindles. Consequently, monopolar spindle mitosis resulted in cleavage failure, while multipolar spindle mitosis led to the formation of both cleavage failure and multipolar cell division. Multinucleation characterized interphase cells which had undergone cytokinesis defects. These cells subsequently became giant multinucleated cells after several rounds of cell cycle with sustained cleavage failure, and were gradually eliminated through cell death. Copyright© 2005 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved