Aldose Reductase Inhibition in Diabetic Complications
Summary
Aldose reductase (AR) inhibition has emerged as a strategic approach to mitigate the microvascular and macrovascular complications that characterise diabetes mellitus. Under hyperglycaemic conditions, elevated flux through the polyol pathway leads to the accumulation of intracellular sorbitol, generating osmotic imbalance, oxidative stress and downstream inflammatory and profibrotic signalling. These events contribute to diabetic retinopathy, nephropathy, neuropathy and cardiovascular disease. Pharmacological inhibitors of AR have been developed to intercept this cascade, aiming to reduce sorbitol accumulation and associated reactive oxygen species. Despite promising preclinical results, translational success has been hampered by limited specificity, inadequate tissue penetration and unintended interference with the enzyme’s role in detoxifying toxic aldehydes. Recent advances in inhibitor design, molecular understanding of AR’s dualistic functions and insights into patient-specific genetic polymorphisms of the ALD2 gene have rekindled interest in this target. Integrating novel delivery systems and selective modulation of AR activity offers a pathway to more effective interventions for diabetic complications.
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Aldose Reductase Inhibition in Diabetic Complications publication trend
The graph below shows the total number of articles in aldose reductase inhibition in diabetic complications across all publications each year (not limited to Nature Index journals).
Technical terms
Aldose reductase: Enzyme that catalyses the NADPH-dependent reduction of glucose to sorbitol in the polyol pathway.
Polyol pathway: Metabolic route converting glucose into sorbitol and fructose, normally minor but upregulated in hyperglycaemia.
Hyperglycaemia: Chronically elevated blood glucose levels associated with diabetes.
Sorbitol: Sugar alcohol produced by the reduction of glucose, accumulation causes osmotic imbalance.
Osmotic stress: Cellular strain resulting from disproportionate intracellular solute concentrations.
Oxidative stress: Damage arising from an excess of reactive oxygen species relative to antioxidant defences.
References
- Response of a Human Lens Epithelial Cell Line to Hyperglycemic and Oxidative Stress: The Role of Aldose Reductase. Antioxidants (2023).
- Physiological and Pathological Roles of Aldose Reductase. Metabolites (2021).
- Aldose Reductase: An Emerging Target for Development of Interventions for Diabetic Cardiovascular Complications. Frontiers in Endocrinology (2021).
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