alpha-glucosidase

Overview

Alpha-glucosidase is an enzyme that plays a critical role in carbohydrate metabolism by catalyzing the hydrolysis of alpha-glucosidic linkages in oligosaccharides and disaccharides, leading to the release of glucose. This enzyme is primarily located in the brush border of the small intestine and is essential for the digestion of carbohydrates. Inhibitors of alpha-glucosidase, such as acarbose, are utilized in the management of type 2 diabetes mellitus (T2DM) to slow down carbohydrate absorption and help control postprandial blood glucose levels. By delaying glucose absorption, alpha-glucosidase inhibitors can improve glycemic control and reduce the risk of hyperglycemia in individuals with high-carbohydrate diets.

Focus of Latest Publications

Recent research demonstrates accelerating interest in developing alpha-glucosidase inhibitors across diverse therapeutic strategies. Natural products—extracted from chia seeds, Garcinia nujiangensis, hawthorn leaves, sea buckthorn juice, Boswellia serrata, and various medicinal and fruit tree species—have yielded potent inhibitors, with phenolic compounds including rosmarinic acid, gallic acid, caffeic acid, and chlorogenic acid identified as key contributors to enzyme inhibition. These plant-derived candidates frequently demonstrated inhibitory potency equivalent to or exceeding acarbose in biochemical assays, with some compounds showing IC₅₀ values in the low micromolar to submicromolar range. Notably, plant extracts often exhibit complementary antioxidant, anti-inflammatory, and antimicrobial activities alongside alpha-glucosidase inhibition, positioning them as multifunctional agents for addressing the broader metabolic dysregulation characteristic of type 2 diabetes.

Synthetic and semi-synthetic inhibitors represent a parallel research axis yielding compounds with substantially enhanced potency. Novel peptides, carbazole-thiazole hybrids, thiazole-hydrazine-isoindole scaffolds, methyl-glycosyl furanose sulfonium derivatives, and imidazothiazole-pyrrole compounds have demonstrated IC₅₀ or KI values 7–15 fold lower than acarbose. Mechanistic characterization revealed diverse inhibition modes—competitive, uncompetitive, and selective inhibition of specific alpha-glucosidase variants (maltase, sucrase, isomaltase)—with molecular docking and dynamics simulations revealing stable interactions at key catalytic residues. In vivo validation in animal models and zebrafish confirmed postprandial glucose reduction and antihyperglycemic efficacy comparable to established reference drugs.

Nanotechnology-based formulations emerged as a strategy to enhance therapeutic outcomes through improved bioavailability and controlled release. Ascorbic acid-functionalized zinc oxide nanoparticles, 1-deoxynojirimycin-loaded zwitterionic lipid nanoparticles, and selenium-conjugated polysaccharide nanoparticles demonstrated superior alpha-glucosidase inhibitory activity and oral bioavailability compared to free compound equivalents. These nano-enabled systems improved glycemic control and in some cases provided additional benefits including neuroprotection and amelioration of diabetic complications such as osteoporosis in preclinical models. Collectively, these studies reinforce alpha-glucosidase as a validated therapeutic target with expanding inhibitor development across natural products, synthetic scaffolds, and nanotechnology platforms.

Key Publications

NEWJun Unlocking the Role of Chia (Salvia hispanica L.) Seed Phenolic Metabolites in Postprandial Glucose Modulation: in vitro, in vivo, and Antioxidant Evidence Supported by Molecular Docking. (Plant foods for human nutrition (Dordrecht, Netherlands), 2026, PMID 42313210): "Docking analyses revealed that rosmarinic acid and its hexoside displayed high binding affinities (-7.7 to -8.1 kcal/mol) toward α-glucosidase targets, closely approaching those of acarbose (-7.9 to -9.1 kcal/mol) and exceeding those of caffeic-acid derivatives, supporting their potential contribution to the in vitro and in vivo responses."
NEWJun Bioactive biphenyl derivatives from Garcinia nujiangensis and structural revision. (Fitoterapia, 2026, PMID 42297079): "Subsequent α-glucosidase inhibitory effect revealed that five compounds (2, 6, 9, 10, and 11) exhibited more potential inhibitory effects than the positive control, with IC50 values of 37.80±1.43 to 147.70±7.36 μg·mL-1."
NEWJun Antioxidant, antibacterial, in vitro, and in silico α-glucosidase inhibition activities and chemical profiling of Usnea cornuta Korb. (PloS one, 2026, PMID 42284305): "The crude extract exhibited strong antioxidant activity (IC50: 32.91±1.27 µg/mL) and notable anti-diabetic effects via α-glucosidase inhibition, with IC50 values of 2.59±2.23 µg/mL for the dichloromethane extract."
May Ultrasound-Assisted Extraction of Free and Bound Phenolics from Hawthorn (Crataegus azarolus) Leaves and their Antioxidant and Antidiabetic Activities. (Plant foods for human nutrition (Dordrecht, Netherlands), 2026, PMID 42141147): "Both fractions inhibited α-amylase and α-glucosidase, demonstrating their in vitro enzyme inhibitory potential."
May In-vitro studies of phytochemical, Antioxidant, Antibacterial and Enzymatic inhibition of Oxalis corniculata whole plant from South Waziristan Tribal District Pakistan. (PloS one, 2026, PMID 42133613): "To analyze phytochemical composition, antioxidant potential, antimicrobial activity and α-glucosidase, cholinesterase and Monoamine oxidase inhibitory potential of Oxalis corniculata extract."
May Rational Sequence Modification Upgrades a Food-Derived Peptide into a Stronger Dual-Functional Regulator of α-Glucosidase Activity and Insulin Resistance. (Journal of agricultural and food chemistry, 2026, PMID 42118964): "Inhibition of α-glucosidase and improvement of insulin resistance (IR) are key strategies for treating type 2 diabetes mellitus (T2DM)."
May Zwitterionic Lipid Nanotherapeutics from Mulberry for Oral Treatment of Diabetic Colitis. (ACS nano, 2026, PMID 42112609): "...while inhibiting the α-glucosidase activity to regulate glucose homeostasis."
May Comparative metabolic profiling, enzyme inhibitory activities, and in-silico analysis of the hexane extract and the hydrodistilled oil of Boswellia serrata. (PloS one, 2026, PMID 42102034): "Further, the oil showed more potent inhibitory activity against cholinesterase, α-glucosidase, and tyrosinase than the HE extract."
May Organ-Specific Phytochemical Composition and Bioactivity Profiling of Chaerophyllum aksekiense: A Multiassay Antioxidant, Enzyme Inhibition, and Correlation-Based Evaluation. (ChemistryOpen, 2026, PMID 42051056): "roots were most active against α-amylase, and leaves against α-glucosidase."
Apr Formulation and characterization of ascorbic acid-based zinc oxide nanoparticles for assessing antidiabetic and neuroprotective effects in STZ-induced diabetic rats. (Artificial cells, nanomedicine, and biotechnology, 2026, PMID 42047278): "In vitro, ZnO-AA NPs showed dose-dependent inhibition of α-amylase and α-glucosidase."

Show 11 more publications

Apr Structure-based design and molecular modelling of n-propylcarbazole-1,3-thiazole hybrids as potent α-glucosidase inhibitors: Kinetic, in vitro, and in vivo evaluation. (Journal of molecular graphics & modelling, 2026, PMID 42033845): "The compounds were primarily evaluated for their α-glucosidase inhibitory activity as potential antidiabetic agents."
Apr Evaluation of the underutilized Malpighia glabra L. fruits as a future functional food: nutritional composition, phenolic profile, biological activities, and synergistic effects with pharmaceutical drugs. (Food & function, 2026, PMID 41944642): "The extract also demonstrated in vitro inhibition of α-glucosidase, with a half-maximal inhibitory concentration (IC50) of 4.81 mg mL-1."
Jun Enzyme-assisted extraction and lactic acid bacteria fermentation enhance sea buckthorn juice bioactivity with botanical fiber supplementation. (International journal of food microbiology, 2026, PMID 41935456): "Fermentation substantially improved the inhibitory activities against α-glucosidase and α-glucoamylase, with the highest enhancement observed during DF supplementation prior to fermentation."
Jun Corn bran fiber valorization via feruloylated xylooligosaccharide production: Evaluation of antioxidant and α-amylase and α-glucosidase inhibitory effects. (Food chemistry, 2026, PMID 41936784): "In addition, FXOS1-24 inhibited porcine pancreatic α-amylase (IC50 ≈ 13 mg/mL) and showed significant α-glucosidase inhibitory activity, suggesting potential antidiabetic properties."
May Comprehensive profiling of chlorophylls, carotenoids extracts and their derivatives in leaves of fruit tree species and assessment of antioxidant and enzyme inhibitory activities. (Food chemistry, 2026, PMID 41861736): "The extracts showed antioxidant activity (ABTS, ORAC), and inhibited key enzymes associated with antidiabetic (α-amylase, α-glucosidase, pancreatic lipase), neurodegenerative diseases (AChE, BChE), and inflammation (COX-1, COX-2, 15-LOX)."
Jun Design, synthesis, in vitro and in silico evaluation of thiazole-hydrazine hybrids incorporating an isoindole-1,3-dione scaffold as potent α-glucosidase inhibitors. (Bioorganic chemistry, 2026, PMID 41855632): "The synthesized derivatives exhibited potent α-glucosidase inhibition, with KI values ranging from 0.452 to 1.788 μM."
May Design, synthesis of novel methyl-glycosyl furanose based sulfonium type α-glucosidase inhibitors with potent antihyperglycemic activity. (European journal of medicinal chemistry, 2026, PMID 41849948): "Developing effective α-glucosidase inhibitors is critical for managing hyperglycemia in individuals with high-carbohydrate diets; however, current drugs exhibit limitations in both efficacy and tolerability."
May Bio-functional potential of a phenolic-rich sunflower meal extract: modulation of individual gut microbes growth and antioxidant, anti-inflammatory, and α-glucosidase inhibitory activities. (Food chemistry, 2026, PMID 41844108): "Additionally, in vitro and in silico assays suggested the inhibitory potential of chlorogenic acid and SFM extract on α-glucosidase, supporting its possible antidiabetic effect."
May Comparative HPLC profiling, antioxidant, enzyme inhibitory activities, and in silico molecular analysis of the aerial parts of Epimedium pubigerum. (Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 2026, PMID 41806791): "Molecular docking analyses revealed that the main compounds identified from E. pubigerum exerted inhibitory effects on the cholinergic system through acetylcholinesterase and butyrylcholinesterase targets and exhibited potential inhibitory activity against carbohydrate metabolism via α-amylase and α-glucosidase enzymes."
May Selenization-based nanotechnology improves the hypoglycemic and anti-osteoporotic efficacy of Rehmannia glutinosa polysaccharide. (Food research international (Ottawa, Ont.), 2026, PMID 41794449): "The Se-RGP NPs exhibited excellent stability during storage and in physiological media, displaying greater inhibitory activity against α-amylase and α-glucosidase than free RGP."
Jun Tailored pyrrole-based imidazothiazole scaffolds: Synthetic elaboration, enzyme kinetic profiling and DFT-guided molecular docking toward Antidiabetic therapeutics. (Computational biology and chemistry, 2026, PMID 41576694): "with the aim of targeting diabetes mellitus through alpha-amylase and alpha-glucosidase inhibition."