Pilot Study to Determine Effects of Salsalate in Type 1 Diabetes and Painful Peripheral Neuropathy — SALP  

Type 1 Diabetes Clinical Trial

Official title: A Pilot Study to Determine the Effects of 12 Weeks of Treatment With Salsalate on Measures of Peripheral Neuropathy in Type 1 Diabetes

Status Completed

Clinical Trial Summary

This 12 week study will examine the effects of daily Salsalate treatment on markers of neuropathic pain and intra-epidermal nerve fiber density. the study is being done in people with type 1 diabetes with signs and symptoms of peripheral neuropathy.

Clinical Trial Description

This project will be used to establish preliminary data for a planned NIH-sponsored multicenter study of the effects of salsalate on diabetic neuropathy (DN) in people with type 1 diabetes. Diabetic peripheral neuropathy (DN) ultimately affects one-half of the patients with type 1 diabetes (T1DM) and is a major cause of disability, high mortality, and poor quality of life. Although intensive glucose control has proven efficacy in delaying or preventing DN in T1DM and type 2 diabetes (T2DM), most people with diabetes do not reach and maintain glycemic levels needed to achieve these benefits. In addition, many patients with diabetes still develop diabetic complications, including DN, despite good glucose control. For DN, no disease modifying treatment other than glycemic control is available. Therefore, it is essential to identify new drug targets and to treat DN as early as possible in its course.

The investigators planned, multi-center study will be the first to determine the effect of an anti-inflammatory agent, salsalate, on DN development and progression, and on DN pain in type 1 diabetes. This proof-of-concept pilot study will measure the effects of short term (12 week) treatment with Salsalate on novel and on established measures of peripheral neuropathy. Ultimately, this may permit measurement of treatment effects over a shorter period of time than by using established measures such as nerve conduction studies. Salsalate, a prodrug form of salicylate, is used to treat osteoarthritis and other rheumatologic conditions. It is highly effective in modulating the IKKβ/NF-κB pathway, with a large margin of safety, and has a glucose lowering effect in patients with type 2 diabetes. The IKKβ/NF-κB pathway is unique in that it is implicated in both the pathogenesis of nerve fiber loss as well as pain in DN. The proposed study design employs a quantifiable early measure of DN, IENFD of the thigh, allowing for accurate assessment of actual nerve fiber density over time.

In the pilot study, biomarkers of pain found in IENF's as well as IENFD will be measured pre and post 3 months of treatment with Salsalate, 3 grams daily. ;

Study Design

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

Related Conditions & MeSH terms

• Diabetes Mellitus, Type 1
• Peripheral Nervous System Diseases
• Peripheral Neuropathy
• Type 1 Diabetes

• NCT number: NCT01480297
• Study type: Interventional
• Source: University of Michigan
• Status: Completed
• Phase: Phase 2
• Start date: November 2011
• Completion date: September 2014