Natural Products and Enzyme Inhibition in Diabetes Management

Diabetes mellitus, particularly type 2, is characterised by impaired insulin secretion and reduced cellular responsiveness, leading to chronic hyperglycaemia and associated complications. A central strategy in glycaemic control involves delaying carbohydrate digestion through inhibition of key digestive enzymes, notably α-amylase and α-glucosidase. Natural products—encompassing flavonoids, terpenoids, limonoids and polyphenols—have attracted considerable interest for their capacity to modulate these enzymes with fewer side effects than synthetic agents. Advances in phytochemical isolation, in vitro and in vivo assays, and computational approaches have illuminated structure–activity relationships and binding interactions. By combining biochemical evaluation with molecular docking and dynamics simulations, researchers are identifying compounds that effectively reduce postprandial glucose excursions, offering a promising route towards novel, plant-derived therapeutics for global diabetes management.

Research from Nature Portfolio

Recent studies have isolated limonoid compounds from lemon peel extracts and demonstrated potent antioxidant and α-amylase inhibitory activities in vitro. Among these, limonin 17-O-β-D-glucopyranoside showed notably strong binding within the active site of human pancreatic α-amylase, as evidenced by prolonged stability in molecular dynamics simulations. Analyses of root-mean-square deviation, fluctuation and solvent-accessible surface area confirmed that this compound maintains a stable conformation within the catalytic domain, underscoring its potential as a lead natural product for attenuating carbohydrate hydrolysis and postprandial glycaemia.

Natural Products and Enzyme Inhibition in Diabetes Management publication trend

The graph below shows the total number of articles in natural products and enzyme inhibition in diabetes management across all publications each year (not limited to Nature Index journals).

Technical terms

α-amylase: An enzyme that catalyses the hydrolysis of α-1,4 glycosidic bonds in starch, reducing polysaccharides to oligosaccharides and disaccharides.

α-glucosidase: A brush-border enzyme that cleaves terminal non-reducing α-1,4-linked glucose residues from oligosaccharides, facilitating conversion to absorbable monosaccharides.

Limonoids: A subclass of triterpenoid compounds predominantly found in citrus fruits, noted for diverse bioactivities including enzyme inhibition and antioxidant effects.

Molecular docking: A computational method used to predict the preferred orientation and binding affinity of a small molecule when it interacts with a target enzyme or receptor.

Molecular dynamics simulation: A computational technique that models the time-dependent behaviour of a molecular system, enabling analysis of stability, conformational changes and interaction dynamics.

References

1. Purification, characterization and molecular docking studies of analogous alpha amylase inhibitor compounds. Journal of King Saud University - Science (2024).
2. New Insights into the Latest Advancement in α-Amylase Inhibitors of Plant Origin with Anti-Diabetic Effects. Plants (2023).
3. Phytochemical profiling from Dioscorea bulbifera L. bulbils using LC-MS, proximate analysis and antidiabetic activity: in vitro and in silico approaches. International Journal of Food Properties (2024).
4. Assessment of the in vitro anti-diabetic activity with molecular dynamic simulations of limonoids isolated from Adalia lemon peels. Scientific Reports (2024).