title: Increased level of tetrahydro-beta-carboline derivatives in short-term fermented garlic.
abstract: In our previous study [1], we found that relatively short-term spontaneous fermentation (40 days at 60-70 degrees C, 85-95% relative humidity) potentiates anti-oxidative properties of garlic, in which scavenging activity against hydrogen peroxide was included. Since tetrahydro-beta-carboline derivatives (THbetaCs) that possess hydrogen peroxide scavenging activity have recently been identified in aged garlic extract, THbetaCs were quantitatively analyzed with liquid chromatography-mass spectrometry (LC-MS). (1R, 3S)-1-Methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (MTCC) and (1S, 3S)-MTCC were found in the fermented garlic extract whereas only trace levels of MTCCs were detected in the row garlic extract. Therefore, it is suggested that relatively short-term fermentation potentiates scavenging activity of garlic against hydrogen peroxide by forming THbetaCs, especially MTCCs.
authors.affiliation: New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
authors.forename: Emiko
authors.initials: E
authors.lastname: Sato
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kohno
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Niwano
mesh_terms: D002243:Carbolines / Q000032:analysis*; D005285:Fermentation; D005737:Garlic / Q000737:chemistry* / Q000378:metabolism
chemical_list: D002243:Carbolines; C009804:tryptoline