Abstract：
:The objective of this investigation was to study the effects of maytansine on the cell cycle kinetics of HeLa cells. The results of this study indicate that maytansine is a very potent mitotic inhibitor and that it has no effect on macromolecular synthesis. Maytansine-induced cytotoxicity was dependent upon the position of the cell in the cell cycle. Mitotic and G2 cells are most sensitive to this agent, while G1 phase cells are the most resistant, with S-phase cells being intermediate. Small (0.82 X 10(-8) M) fractionated doses given at an interval of 8 hr have been found to be more cytotoxic than was a large (1.63 X 10(-8) M) single dose. In evaluating the drug combinations, we observed that the schedule in which 1-beta-D-arabinofuranosylcytosine treatment was followed by maytansine treatment exhibited greater cell kill than the reverse sequence. No schedule-dependent effects were observed when maytansine was tried in combination with Adriamycin.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Rao PN,Freireich EJ,Smith ML,Loo TLsubject
Has Abstractpub_date
1979-08-01 00:00:00pages
3152-5issue
8eissn
0008-5472issn
1538-7445journal_volume
39pub_type
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