Abstract
RL-95, a moderately well-differentiated adenosquamous endometrial carcinoma cell line, can be used as a model for testing chemotherapeutic agents in vitro. Cells are grown in T-75 flasks, transferred to scintillation vials, and grown for 24 hr. Following this, medium is removed and new medium containing Adriamycin (Adr) and cis-platinum (CP) is added. Effects of the two drugs are measured by cell counts and DNA synthesis. To measure DNA synthesis, cells are incubated with [3H]thymidine (3H-THY) for up to 24 hr. Decreased DNA synthesis is reflected in decreased 3H-THY uptake. Cell kill is obtained with levels of drugs that are clinically achievable. Evidence is presented for increased cytotoxicity with concomitant, rather than sequential, chemotherapy. Results are also confirmed by testing the agent on MCF-7, a well-known breast cancer cell line. The results indicate that (1) endometrial carcinoma responds to Adriamycin and cis-platinum chemotherapeutic agents in vitro, and (2) RL-95 can be used as a model for testing varying concentrations, time of exposure, and combinations of chemotherapeutic agents.
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