title: Increasing antioxidant activity of procyanidin extracts from the pericarp of Litchi chinensis processing waste by two probiotic bacteria bioconversions.
abstract: Litchi chinensis pericarp from litchi processing waste is an important plant source of A-type procyanidins, which were considered a natural dietary supplement because of their high biological activity in vivo. Litchi pericarp oligomeric procyanidins (LPOPCs) did not selectively modify the growth of Streptococcus thermophilus and Lactobacillus casei -01 at concentrations of 0.25 and 0.5 mg/mL, and it was demonstrated that the two strains could transform procyanidins during their log period of growth by two different pathways. S. thermophilus was able to metabolize procyanidin A2 to its isomer, and L. casei could decompose flavan-3-ols into 3,4-hydroxyphenylacetic acid, 4-hydroxyphenylpropionic acid, m-coumaric acid, and p-coumaric acid. The total antioxidant capability (T-AOC) of LPOPCs before and after microbial incubation was estimated, and the results suggested that probiotic bacteria bioconversion is a feasible and efficient method to convert litchi pericarp procyanidins to a more effective antioxidant agent.
authors: Natural Product Laboratory, College of Food Science and Technology, and ‡State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University (HZAU) , Wuhan 430070, People's Republic of China.
authors: Shuyi
authors: S
authors: Li
authors: Lu
authors: L
authors: Chen
authors: Ting
authors: T
authors: Yang
authors: Qian
authors: Q
authors: Wu
authors: Zhejuan
authors: Z
authors: Lv
authors: Bijun
authors: B
authors: Xie
authors: Zhida
authors: Z
authors: Sun
mesh_terms: D000975:Antioxidants / Q000032:analysis / Q000378:metabolism*; D044946:Biflavonoids / Q000032:analysis / Q000378:metabolism*; D001711:Biotransformation; D002392:Catechin / Q000032:analysis / Q000378:metabolism*; D005638:Fruit / Q000737:chemistry / Q000378:metabolism / Q000382:microbiology; D007780:Lacticaseibacillus casei / Q000254:growth & development / Q000378:metabolism*; D032125:Litchi / Q000737:chemistry* / Q000378:metabolism / Q000382:microbiology; D010936:Plant Extracts / Q000032:analysis / Q000378:metabolism*; D044945:Proanthocyanidins / Q000032:analysis / Q000378:metabolism*; D019936:Probiotics / Q000378:metabolism*; D048249:Streptococcus thermophilus / Q000254:growth & development / Q000378:metabolism*; D014866:Waste Products / Q000032:analysis
chemical_list: D000975:Antioxidants; D044946:Biflavonoids; D010936:Plant Extracts; D044945:Proanthocyanidins; D014866:Waste Products; C017674:procyanidin; D002392:Catechin