The colony inhibition of a new chemotherapeutic agent (KW2152) against human lung cancer cell lines.

The human tumor colony assay was used to evaluate the effect of a new chemotherapeutic agent (KW2152) on colony inhibition of four non-small cell lung cancer cell lines and a mouse cell line. With continuous exposure experiments, KW2152 induced greater than or equal to 70% colony inhibition of PC-7 (human adenocarcinoma), PC-10 (human squamous cell) and PC-13 (human large cell) at a drug concentration of 10 mcg/ml. In one hour exposure experiments, KW2152 caused a significant reduction in colony formation (less than or equal to 30% of control) only at the highest concentration tested (100 mcg/ml). KW2152 showed significant in vitro activity against human non-small cell lung cancer cell lines. Due to these promising results, it was suggested that KW2152 should be evaluated in clinical trials.