Antimutagenic Characteristics of Lactobacillua spp. and Bifidobacterium spp. against 2-Nitrofluorene

Lactobacillus spp.와 Bifidobacterium spp.에 의한 돌연변이원물질 2-Nitrofluorene에 대한 돌연변이 억제특성

  • Published : 1998.11.06

Abstract

Studies on the antimutagenicity of Lactobacillus spp. and Bifidobactrium spp. against 2-nitrofluorene have been conducted utilyzing Salmonella typhimurium TA 98 in order to characterize the activity by the starter and non-starter strains. The average antimutagenic activity of Lactobacillus spp. and Bifidobactrium spp. against 2-nitrofluorene was 20.29% and L. plantarum CU 722 revealed the greatest mutation inhibition activity of 50.34%. An intensive antimutagenicity was found in the cell wall and cytoplasm fraction of L. plantarum CU 722 in skim milk culture showing inhibition rate of 34.9% and 24.5% respectively and very low activity remained in cell free broth and in lactic acid. The optimum cultivation time for Lactobacillus spp. and Bifidobacterium spp. to inhibit mutation was 24 hours and the optimum preincubation time of the reaction mixture containing the mutagen, lactic culture and indicator strain was 60 minutes, and the optimum incubation time for the test plates was 48 hours.