Journal
DIABETES CARE
Volume 24, Issue 10, Pages 1776-1782Publisher
AMER DIABETES ASSOC
DOI: 10.2337/diacare.24.10.1776
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OBJECTIVE - The purpose of this study was to evaluate the efficacy of fidarestat a novel, aldose reductase (AR) inhibitor, in a double-blind placebo controlled study in patients with type 1 and type 2 diabetes and associated peripheral neuropathy. RESEARCH DESIGN AND METHODS - A total of 279 patients with diabetic neuropathy were treated With placebo or fidarestat at a daily dose of I mg for 52 weeks. The efficacy evaluation was based on change in electrophysiological measurements of Median and tibial motor nerve conduction velocity, F-wave minimum latency, F-wave conduction velocity (FCV), an me an sensory nerve conduction velocity (forearm and distal), as well as an assessment of. subjective Symptoms. RESULTS - Over the course of the study, five of the eight electrophysiological measures assessed showed significant improvement from baseline in the fidarestat-treated group, whereas no measure showed significant deterioration. In contrast, in the placebo group, no electrophysiological measure was improved, and one measure significantly deteriorated (i.e., median nerve FCV). At the Study conclusion, the fidarestat-treated group was significantly improved compared with the placebo group in two electro physiological measures (i.e., median nerve FCV and minimal latency). Subjective symptoms (including numbness, spontaneous pain, sensation of rigidity, paresthesia in the sole upon walking, heaviness in the foot, and hypesthesia) benefited from fidarestat treatment, and all were significantly improved in the treated versus placebo group at the study conclusion. At the dose used, fidarestat was well tolerated, with an adverse event profile that did not significantly differ from that seen in the placebo group. CONCLUSIONS - The effects of fidarestat-treatment on nerve conduction and the subjective symptoms of diabetic neuropathy provide evidence that this treatment alters the progression of diabetic neuropathy.
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