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Carbohydr. Polym., Available online 1 February 2024 | https://doi.org/10.1016/j.carbpol.2024.121898 α-Glucan-type exopolysaccharides with varied linkage patterns: Mitigating post-prandial glucose spike and prolonging the glycemic response

Hae-eun Lim ^a, Young-Bo Song ^a, Hyun-wook Choi ^b, Byung-Hoo Lee ^a

^aDepartment of Food Science & Biotechnology, Gachon University, Seongnam 13120, Republic of Korea

^bDepartment of Functional Food and Biotechnology, Jeonju University, Jeonju 55069, Republic of Korea

Corresponding authors: Hyun-wook Choi, Byung-Hoo Lee

Abstract

Microbial exopolysaccharides (EPSs) are traditionally known as prebiotics that foster colon health by serving as microbiota nutrients, while remaining undigested in the small intestine. However, recent findings suggest that α-glucan structures in EPS, with their varied α-linkage types, can be hydrolyzed by mammalian α-glucosidases at differing rates. This study explores α-glucan-type EPSs, including dextran, alternan, and reuteran, assessing their digestive properties both in vitro and in vivo. Notably, while fungal amyloglucosidase - a common in vitro tool for carbohydrate digestibility analysis - shows limited efficacy in breaking down these structures, mammalian intestinal α-glucosidases can partially degrade them into glucose, albeit slowly. In vivo experiments with mice revealed that various EPSs elicited a significantly lower glycemic response (p < 0.05) than glucose, indicating their nature as carbohydrates that are digested slowly. This leads to the conclusion that different α-glucan-type EPSs may serve as ingredients that attenuate post-prandial glycemic responses. Furthermore, rather than serving as mere dietary fibers, they hold the potential for blood glucose regulation, offering new avenues for managing obesity, Type 2 diabetes, and other related-chronic diseases.

논문정보

형식Research article
게재일2024년 02월 (BRIC 등록일 2024-02-26)
연구진국내 연구진
분야 생명과학 > 식품학

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