title: Alcohol dehydrogenase activity in Lactococcus chungangensis: application in cream cheese to moderate alcohol uptake.
abstract: Many human gastrointestinal facultative anaerobic and aerobic bacteria possess alcohol dehydrogenase (ADH) activity and are therefore capable of oxidizing ethanol to acetaldehyde. However, the ADH activity of Lactococcus spp., except Lactococcus lactis ssp. lactis, has not been widely determined, though they play an important role as the starter for most cheesemaking technologies. Cheese is a functional food recognized as an aid to digestion. In the current study, the ADH activity of Lactococcus chungangensis CAU 28(T) and 11 reference strains from the genus Lactococcus was determined. Only 5 strains, 3 of dairy origin, L. lactis ssp. lactis KCTC 3769(T), L. lactis ssp. cremoris KCCM 40699(T), and Lactococcus raffinolactis DSM 20443(T), and 2 of nondairy origin, Lactococcus fujiensis NJ317(T) and Lactococcus chungangensis CAU 28(T) KCTC 13185(T), showed ADH activity and possessed the ADH gene. All these strains were capable of making cheese, but the highest level of ADH activity was found in L. chungangensis, with 45.9nmol/min per gram in tryptic soy broth and 65.8nmol/min per gram in cream cheese. The extent that consumption of cheese, following imbibing alcohol, reduced alcohol uptake was observed by following the level of alcohol in the serum of mice. The results show a potential novel benefit of cheese as a dairy functional food.
authors.affiliation: Department of Microbiology, Chung-Ang University College of Medicine, Seoul 156-756, Republic of Korea.
authors.forename: Maytiya
authors.initials: M
authors.lastname: Konkit
authors.affiliation: Department of Microbiology, Chung-Ang University College of Medicine, Seoul 156-756, Republic of Korea.
authors.forename: Woo Jin
authors.initials: WJ
authors.lastname: Choi
authors.affiliation: Department of Microbiology, Chung-Ang University College of Medicine, Seoul 156-756, Republic of Korea. Electronic address: kimwy@cau.ac.kr.
authors.forename: Wonyong
authors.initials: W
authors.lastname: Kim
mesh_terms: D000426:Alcohol Dehydrogenase / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D002611:Cheese / Q000382:microbiology*; D003470:Culture Media / Q000737:chemistry; D000431:Ethanol / Q000378:metabolism; D005511:Food Handling; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D017045:Lactococcus / Q000201:enzymology*; D051379:Mice; D008813:Mice, Inbred ICR
chemical_list: D003470:Culture Media; D000431:Ethanol; D000426:Alcohol Dehydrogenase; D007770:L-Lactate Dehydrogenase
keywords: Lactococcus; Lactococcus chungangensis; alcohol dehydrogenase; cream cheese