Cell volume growth after cell cycle block with chemotherapeutic agents
- PMID: 58726
- DOI: 10.1111/j.1365-2184.1976.tb01286.x
Cell volume growth after cell cycle block with chemotherapeutic agents
Abstract
The effects of various chemotherapeutic agents on the volume of Chinese hamster V79 fibroblasts and murine lymphoma L5178Y cells were studied by electronic volume spectroscopy. Cells arrested in the division cycle by a chemotherapeutic block continued to grow in volume resulting in abnormally large cells unable to reduce their volume by cell division. This was observed in cells treated with colcemid, vinblastine, excess thymidine, hydroxyurea, ARA-C, 5-fluorouracil, actinomycin-D and bleomycin, but not with puromycin or cycloheximide. Increase in cell volume of blocked cells was correlated with a decrease in cell survival as measured by clonogenic ability. The results suggest the possibility of volume spectroscopy for a rapid in vitro test to determine tumor sensitivity to chemotherapeutic agents and the in vivo monitoring of response to chemotherapy. Mechanisms for increased cell kill by a second agent acting selectively on enlarged cells are considered.
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