Intestinal alpha-glucosidase

Class

Alpha-glucosidase inhibitor (Sangzhi alkaloids: 1-deoxynojirimycin/DAB/fagomine blend)

Intestinal alpha-glucosidases are enzymes anchored in the brush border of the small intestine that complete the final step of carbohydrate digestion, cleaving disaccharides and short oligosaccharides such as maltose and sucrose into absorbable monosaccharides like glucose. By inhibiting these enzymes, less glucose is liberated and absorbed immediately after a meal, which blunts and delays the rise in blood glucose that normally follows carbohydrate ingestion. This mechanism is relevant to type 2 diabetes and prediabetes, where controlling the after-meal (postprandial) glucose excursion is a therapeutic goal, particularly for individuals whose diets are carbohydrate-rich. The class of compounds discussed here, iminosugars derived from plant sources including mulberry, structurally resemble glucose and occupy the enzyme's active site, acting as competitive inhibitors. Because several distinct alpha-glucosidase subtypes exist in the gut, each with somewhat different substrate preferences, a blend of related iminosugar molecules can provide broader coverage across these subtypes than a single compound alone, more evenly slowing the breakdown of a range of dietary carbohydrates rather than acting on just one type of sugar linkage. This approach does not increase insulin secretion or sensitivity directly; it works by modifying the pace of digestion itself.