Abstract
The effects of carboplatin and cisplatin on colony formation in stomach and lung cancer cell lines were examined and compared. The colony-inhibitory activity of carboplatin against stomach and lung cancer cell lines was similar to that of cisplatin when one-tenth of the peak plasma concentration of each drug was used (r = 0.80). One of the four stomach cancer cell lines was sensitive to carboplatin although all the stomach cancer cell lines were resistant to cisplatin. Of the three small cell lung cancer cell lines tested, two were sensitive to both carboplatin and cisplatin, and only one cell line (N857) was resistant to cisplatin; all the non-small cell cancer cell lines tested were resistant to both drugs. On the basis of these preliminary results, we suggest that carboplatin has potential therapeutic activity against stomach cancer and should be evaluated carefully from this aspect.
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