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Screening and Identification of Cholesterol-Lowering Lactic Acid Bacteria from Fermented Sour Meat

DING Miao, LIU Yang, GE Ping-zhen, WANG Dan, ZHOU Cai-qiong     

  1. Chongqing Special Food Engineering and Technology Research Center, College of Food Science,
    Southwest University, Chongqing 400715, China
  • Online:2014-10-15 Published:2014-10-17

Abstract:

Cholesterol-lowering lactic acid bacteria were screened from fermented sour meat by using different culture
media. Totally 18 strains were isolated, among which SR10 had the highest cholesterol-lowering capacity and could reduce
cholesterol by 68.49 μg/mL, representing 33.78% of the initial concentration. Through the morphological observation,
physical and chemical identification and 16S rRNA molecular analysis, SR10 strain was identified as digesting Lactobacillus.
Furthermore, a preliminary investigation was carried out on the cholesterol-lowering mechanism of Lactobacillus SR10. It
was found that the intracellular enzymes of SR10 were mainly responsible for this activity and had 8.7 times higher specific
activity than the extracellular ones.

Key words: fermented sour meat, cholesterol-lowering lactic acid bacteria, screening, identification, intracellular enzyme

CLC Number: