A newly isolated intestinal bacterium involved in the C-ring cleavage of flavan-3-ol monomers and the antioxidant activity of the metabolites
文献类型： 外文期刊
作者： Wang, Li 1 ; Liu, Ruonan 1 ; Yan, Fangfang 1 ; Chen, Wanbing 3 ; Zhang, Mo 1 ; Lu, Qun 1 ; Huang, Bijun 1 ; Liu, Rui 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan 430000, Peoples R China
2.Wuhan Engn Res Ctr Bee Prod Qual & Safety Control, Wuhan 430000, Peoples R China
3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 430073, Guangdong, Peoples R China
4.Minist Educ, Key Lab Environm Correlat Dietol, Wuhan, Peoples R China
5.Minist Agr & Rural Affairs, Key Lab Urban Agr Cent China, Beijing, Peoples R China
期刊名称：FOOD & FUNCTION （ 影响因子：6.1； 五年影响因子：6.5 ）
ISSN： 2042-6496
年卷期： 2024 年 15 卷 2 期
页码：
收录情况： SCI
摘要： Flavan-3-ols are an important class of secondary metabolites in many plants. Their bioavailability and bioactivity are largely determined by the metabolism of intestinal microbiota. However, little is known about the intestinal bacteria involved in the metabolism of flavan-3-ols and the activities of the metabolites. C-ring cleavage is the initial and key step in the metabolism of flavan-3-ol monomers. Here, we isolated a strain from porcine cecum content, which is capable of cleaving the heterocyclic C-ring to form 1-(3 ',4 '-dihydroxyphenyl)-3-(2 '',4 '',6 ''-trihydroxyphenyl)propan-2-ol from (+)-catechin and (-)-epicatechin, and 1-(3 ',4 ',5 '-trihydroxyphenyl)-3-(2 '',4 '',6 ''-trihydroxyphenyl) propan-2-ol from (-)-epigallocatechin. The strain was identified as Streptococcus pasteurianus (Streptococcus gallolyticus subsp. Pasteurianus, designated as F32-1) based on 16S rDNA similarity and MALDI-TOF-MS identification. The formation of the C-ring cleavage structural unit by the F32-1 strain enhanced the chemical antioxidant ability and altered the cellular antioxidant activity of (+)-catechin, (-)-epicatechin and (-)-epigallocatechin. Overall, in this study we isolated a new intestinal bacterium involved in the C-ring cleavage of flavan-3-ol monomers and elucidated the bioactivity of their metabolites. Flavan-3-ols are an important class of secondary metabolites in many plants.
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