Abstract Title:

High-dose thiamine therapy for patients with type 2 diabetes and microalbuminuria: a randomised, double-blind placebo-controlled pilot study.

Abstract Source:

Diabetologia. 2009 Feb;52(2):208-12. Epub 2008 Dec 5. PMID: 19057893

Abstract Author(s):

N Rabbani, S S Alam, S Riaz, J R Larkin, M W Akhtar, T Shafi, P J Thornalley

Abstract:

AIMS/HYPOTHESIS: High-dose supplements of thiamine prevent the development of microalbuminuria in experimental diabetes. The aim of this pilot study was to assess whether oral supplements of thiamine could reverse microalbuminuria in patients with type 2 diabetes. METHODS: Type 2 diabetic patients (21 male, 19 female) with microalbuminuria were recruited at the Diabetes Clinic, Sheikh Zayed Hospital, Lahore, Pakistan, and randomised to placebo and treatment arms. Randomisation was by central office in sequentially numbered opaque, sealed envelopes. Participants, caregivers and those assessing the outcomes were blinded to group assignment. Patients were given 3 x 100 mg capsules of thiamine or placebo per day for 3 months with a 2 month follow-up washout period. The primary endpoint was change in urinary albumin excretion (UAE). Other markers of renal and vascular dysfunction and plasma concentrations of thiamine were determined. RESULTS: UAE was decreased in patients receiving thiamine therapy for 3 months with respect to baseline (median -17.7 mg/24 h; p < 0.001, n = 20). There was no significant decrease in UAE in patients receiving placebo after 3 months of therapy (n = 20). UAE was significantly lower in patients who had received thiamine therapy compared with those who had received placebo (30.1 vs 35.5 mg/24 h, p < 0.01) but not at baseline. UAE continued to decrease in the 2 month washout period in both groups, but not significantly. There was no effect of thiamine treatment on glycaemic control, dyslipidaemia or BP. There were no adverse effects of therapy. CONCLUSIONS/INTERPRETATION: In this pilot study, high-dose thiamine therapy produced a regression of UAE in type 2 diabetic patients with microalbuminuria. Thiamine supplements at high dose may provide improved therapy for early-stage diabetic nephropathy. TRIAL REGISTRATION: CTRI (India) CTRI/2008/091/000112. FUNDING: Pakistan Higher Education Commission.

Study Type : Human Study

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