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Clinical Trial Summary

The purpose of this study is to determine the safety of TAK-128, once daily (QD), for treatment of diabetic peripheral neuropathy


Clinical Trial Description

Polyneuropathy is a frequent complication of diabetes; it affects most individuals after prolonged hyperglycemia, and diabetic neuropathy is very common in the developed world. Chronic, insidious, distal sensorimotor polyneuropathy with autonomic impairment is the most typical form of diabetic neuropathy. Less common, but more florid presentations include autonomic symptoms or painful neuropathy. Although many patients have no or relatively few symptoms, the chronic polyneuropathy and autonomic dysfunction predispose to neurotrophic foot ulceration; consequently, diabetes is the leading cause of amputation today.

Diabetic neuropathy is a dying-back polyneuropathy with distal degeneration of the longest nerve fibers advancing in a centripetal direction. Multiple histopathological changes are observed, but progressive fiber loss is the hallmark of diabetic polyneuropathy. Other important features include endothelial cell basement membrane thickening, segmental demyelination and remyelination, and axonal atrophy. Similar pathological changes are observed in type 1 and type 2 diabetes. The severity of neuropathy as indicated by the stage of nerve fiber loss determines the clinical, electrophysiological, and quantitative sensory threshold features of this disorder. The functional measures of electrophysiological and quantitative sensory thresholds reflect the morphological changes and the clinical features.

Diabetic polyneuropathy is etiologically related to prolonged hyperglycemia with multiple consequences. Although strict glycemic control prevents neuropathy in type 1 patients if maintained for many years, similar interventions in those with type 2 diabetes mellitus are less successful. Type 2 patients may have neuropathy with considerable nerve fiber loss at the time of diagnosis because of unsuspected hyperglycemia in preceding years. Reversal of established neuropathy with strict glycemic control is not certain to occur, even if maintained for many years. Co-morbid disease often interferes with strict management of type 2 diabetes. Even among those with type 1 diabetes, a minority of patients are successful in maintaining prolonged euglycemia.

TAK-128 is a novel synthetic compound being developed as a treatment for diabetic neuropathy. Subjects participating in this study successfully completed Protocol 01-04-TL-128-003, and earlier study of TAK-128. ;


Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT00756041
Study type Interventional
Source Takeda
Contact
Status Terminated
Phase Phase 2
Start date September 2005
Completion date September 2006

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