Abstract
To determine whether simultaneous and/or delayed administration of sodium thiosulphate (STS) affects the oncologic effect of cisplatin or cisdiaminedichloroplatinum (CDDP) in EMT6 tumour cells in vitro. Cell biology research laboratory. Clonogenic assays of EMT6 tumour cells with CDDP alone, CDDP plus simultaneous STS, and CDDP plus a 4-hour delay of STS were performed. Growth fractions under these three conditions were compared. Tumour growth was statistically significantly increased when CDDP and STS were administered compared with CDDP alone. There was no statistically significant difference between simultaneous and 4-hour delay of STS administration. We conclude that in EMT6 cells, either simultaneous administration or a 4-hour delay of STS administration significantly decreases CDDP efficacy. STS adversely affects CDDP's oncologic efficacy in EMT6 cell cultures in vitro.
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