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Journal of Dairy Science Vol. 69 No. 9 2237-2242
© 1986 by American Dairy Science Association ®
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Antimutagenic Properties of Lactic Acid-Cultured Milk on Chemical and Fecal Mutagens

Akiyoshi Hosono and Takako Kashina

Faculty of Agriculture, Shinshu University Ina, Nagano-Ken 399-45, Japan

Tsuneo Kada

Department of Induced Mutation, National Institute of Genetics, Mishima, Shizuoka-Ken 411, Japan

ABSTRACT

The antimutagenic properties of milk cultured with Lactobacillus bulgaricus and Streptococcus thermophilus were examined using streptomycin-dependent strains of Salmonella in an in vitro assay system. The mutagens utilized for testing included 2-(2-furyl)-3-(5-nitro-2-furyl) acrylamide, 4-nitroquinoline-N-oxide, and fecal mutagenic extracts from cats, monkeys, dogs, and other mammals.

Both types of cultured milk exhibited antimutagenic activity on all mutagens used. Antimutagenic activities of the cultured milks with 2-(2-furyl)-3-(5-nitro-2-furyl) acrylamide and 4-nitroquinoline-N-oxide increased with incubation time but were thermolabile beyond 55°C for 10 min.






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Copyright © 1986 by the American Dairy Science Association ®.