More than additive toxicity of the combination of 1-methyl-1-nitrosourea plus 1,3-bis(2-chloroethyl)-1-nitrosourea in the rat.

Abstract

The combination toxicity index of 1-methyl-1-nitrosourea plus 1,3-bis (2-chloroethyl)-1-nitrosourea determined in the rat was 0.32. This overadditive combination toxicity appears mainly to be due to severe damage of the intestinal mucosa as diagnosed by histological examination and to damage of pluripotent stem cells in the bone marrow as could be assessed… (More)

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