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Chemical composition and in vitro intestinal probiotic properties analysis of exopolysaccharides from screened Streptococcus thermophilus 90301

文献类型: 外文期刊

作者: Wang, Xiaochan 1 ; Lin, Tao 2 ; Lin, Yihan 3 ; Xu, Chang 4 ; Ma, Kai 5 ; Zhang, Changliang 5 ; Ji, Feng 5 ; Mahsa, Ghahvechi Chaeipeima 1 ; Rui, Xin 1 ; Li, Wei 1 ;

作者机构: 1.Nanjing Agr Univ, Sanya Inst, Coll Food Sci & Technol, Nanjing 210095, Jiangsu, Peoples R China

2.Yunnan Acad Agr Sci, Kunming 650205, Yunnan, Peoples R China

3.Tianjin Univ Tradit Chinese Med, Coll Tradit Chinese Med, Tianjin 301617, Peoples R China

4.Hunan Univ Tradit Chinese Med, Coll Integrated Chinese & Western Med, Changsha 410208, Hunan, Peoples R China

5.Jiangsu New Bio Biotechnol Co Ltd, Jiangyin 214400, Jiangsu, Peoples R China

6.Jiangsu Biodep Biotechnol Co Ltd, Jiangyin 214400, Jiangsu, Peoples R China

关键词: Extracellular polysaccharides; Structural analysis; Gastrointestinal digestion; Probiotics

期刊名称:INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES ( 影响因子:8.5; 五年影响因子:8.7 )

ISSN: 0141-8130

年卷期: 2025 年 311 卷

页码:

收录情况: SCI

摘要: A strain of Streptococcus thermophilus 90301, characterized by robust growth and high exopolysaccharide (EPS) production, was selected. Following isolation and purification, two EPS components, EPS-1 and EPS-2, were obtained. The analysis revealed that EPS-1 was composed of mannose, rhamnose, glucosamine, glucose, and galactose with molar ratios of 0.94:0.09:0.11:1.00:0.16, whereas EPS-2 was composed of mannose, ribose, glucose, and galactose with molar ratios of 15.11:0.26:1.00:0.38; respectively. The average molecular weights were determined to be 2.31 x 105 Da for EPS-1 and 2.41 x 105 Da for EPS-2. Furthermore, the prebiotic potential of the two fractions (EPS-1 and EPS-2) was investigated through in vitro simulation of human fecal fermentation digestion. Both EPS-1 and EPS-2 were not digested by the digestive fluids and were able to significantly modulate the composition of the gut microbiota. Additionally, they enhanced the gut microbiota's ability to produce short-chain fatty acids. These findings provide some basis for the functional application of polysaccharide components extracted from S. thermophilus 90301 as a potential prebiotic.

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