Vitamin C intake influences the bleomycin-induced chromosome damage assay: implications for detection of cancer susceptibility and chromosome breakage syndromes.

Mutation Research
H Pohl, J A Reidy

Abstract

Supplementation with 1 g of vitamin C (ascorbic acid) per day decreased the amount of chromosome damage induced in lymphocytes by an exposure to bleomycin during the last 5 h of cell culture. We did not see such changes in lymphocytes from control individuals samples at the same time but not taking vitamin C supplements. This bleomycin assay has been proposed as a test for cancer susceptibility. A similar assay for genetic instability may be useful in detecting heterozygotes for chromosome-breakage syndromes (for example, Fanconi anemia or ataxia telangiectasia). Even though our sample size is small and our results should be interpreted cautiously, statistically significant effects were found with vitamin C supplementation. It would, therefore, be prudent to consider dietary and perhaps other lifestyle factors when interpreting of results from this bleomycin assay and related assays for genetic instability.

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