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Structural Dependence of Sulfated Polysaccharide for Diabetes Management: Fucoidan From Undaria pinnatifida Inhibiting α-Glucosidase More Strongly Than α-Amylase and Amyloglucosidase.

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TLDR
It was demonstrated that while the fucoidan exhibited significant inhibitory effects against all the three starch hydrolases, it is an uncompetitive inhibitor of α-amylase and amyloglucosidase, and is a competitive inhibitor ofα-glucOSidase.
Abstract
Fucoidan refers to a group of sulfated polysaccharide that is commonly obtained from various species of brown seaweed. Fucoidan has gained increased popularity among researchers in the recent years due to its numerous biological activities, including its inhibitory effects against starch hydrolyzing enzymes such as α-amylase and α-glucosidase. This highlights the potential of fucoidan as an antidiabetic agent in the management and prevention of diabetes mellitus. In this study, the inhibitory effects of fucoidan isolated from the New Zeaweed Undaria pinnatifida seaweed species against three starch hydrolyzing enzymes – α-amylase, α-glucosidase and amyloglucosidase was investigated. It was demonstrated that while the fucoidan exhibited significant inhibitory effects against all the three starch hydrolases, it is an uncompetitive inhibitor of α-amylase and amyloglucosidase, and is a competitive inhibitor of α-glucosidase. Moreover, it exhibited significantly stronger inhibitory effects against α-glucosidase than α-amylase, thus having the desirable characteristics as an antidiabetic agent.

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Journal ArticleDOI

Fucoidan Structure and Its Impact on Glucose Metabolism: Implications for Diabetes and Cancer Therapy.

TL;DR: Fucoidans are complex polysaccharides derived from brown seaweeds which consist of considerable proportions of L-fucose and other monosaccharides, and sulphated ester residues.
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Food-derived non-phenolic α-amylase and α-glucosidase inhibitors for controlling starch digestion rate and guiding diabetes-friendly recipes

TL;DR: In this paper, the authors presented an updated overview on classification, inhibitory effects, mechanism, and potential application of these inhibitors in foods, including non-starch polysaccharides, peptides, and lipids compounds.
Journal ArticleDOI

Food-derived non-phenolic α-amylase and α-glucosidase inhibitors for controlling starch digestion rate and guiding diabetes-friendly recipes

TL;DR: In this paper , the authors presented an updated overview on classification, inhibitory effects, mechanism, and potential application of these inhibitors in foods, including non-starch polysaccharides, peptides, and lipids compounds.
Journal ArticleDOI

The effects of bioactive compounds from blueberry and blackcurrant powders on the inhibitory activities of oat bran pastes against α-amylase and α-glucosidase linked to type 2 diabetes.

TL;DR: In this article, the α-amylase and α-glucosidase inhibitory activities by extracts of oat bran, blueberry and blackcurrant powders, as well as OAT bran pastes supplemented 25% of blueberry powder, were studied by measuring their half inhibitory (IC50) concentrations.
Journal ArticleDOI

Brown Algae Carbohydrates: Structures, Pharmaceutical Properties, and Research Challenges

TL;DR: In this article, the major polysaccharide components in brown algae, namely alginate, laminarin, and fucoidan, are reviewed and their application in functional foods and pharmaceuticals.
References
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Journal ArticleDOI

Fucoidan: Structure and Bioactivity

TL;DR: This review summarizes the research progress on the structure and bioactivity of fucoidan and the relationships between structure andBioactivity and several fucoidans’ structures have been solved.
Journal ArticleDOI

Chemical Structures and Bioactivities of Sulfated Polysaccharides from Marine Algae

TL;DR: The present paper will provide an update on the structural chemistry of the major sulfated polysaccharides synthesized by seaweeds including the galactans, ulvans, and fucans and the recent findings on the anticoagulant/antithrombotic, antiviral, immuno-inflammatory, antilipidemic and antioxidant activities of sulfated Polysaccharide and their potential for therapeutic application.
Journal ArticleDOI

Recent Insights into Inhibition, Structure, and Mechanism of Configuration-Retaining Glycosidases.

TL;DR: Not "from above", but "from the side": Configuration-retaining β-glycosidases protonate their substrate either anti or syn to the endocyclic C1-O bond as the first step in the enzymic cleavage of the glycosidic bond.
Journal ArticleDOI

α- and β-Glucosidase inhibitors: chemical structure and biological activity

TL;DR: This review is aimed at highlighting the main chemical classes of glucosidase inhibitors, as well as their biological activities toward α- and β-glucosidases, but it is not intended to be an exhaustive review on the subject.
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