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Aldose Reductase Inhibitors in the Treatment of Diabetic Neuropathy

A Review of the Rationale and Clinical Evidence

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Summary

This review considers the definition of clinical diabetic neuropathy and the theoretical basis for the use of aldose reductase inhibitors in the treatment of distal sensorimotor neuropathy, the most common clinical problem. Myoinositol depletion is related to hyperglycaemia-induced polyol activity, changes which are associated with early functional deficits in acute experimental diabetes. These changes are reversible by the administration of aldose reductase inhibitors, and this provides the rationale for the treatment of human diabetic neuropathy with these agents. Many early trials of these drugs have produced some evidence of clinical benefit in patients with diabetic neuropathy, but interpretation of data is difficult as patient selection and neuropathy definition are not yet standardised. In addition, it is possible that once the neuropathic process is initiated, there is a point where it becomes irreversible, and treatment with aldose reductase inhibitors may therefore be of more relevance in early neuropathy. Long term double-blind multicentre trials are in progress, and preliminary data from some of these are reasonably encouraging. In conclusion, the results from clinical trials of the aldose reductase inhibitors in this difficult area are sufficiently encouraging to lead us to be optimistic about their future development, and continuing work should clarify their potential role with respect to the prophylaxis and treatment of diabetic neuropathy.

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Masson, E.A., Boulton, A.J.M. Aldose Reductase Inhibitors in the Treatment of Diabetic Neuropathy. Drugs 39, 190–202 (1990). https://doi.org/10.2165/00003495-199039020-00003

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