Benfotiamin inhibits intracellular formation of advanced Glycation endproducts in vivo.
Diabetes. 2000 May; 49(Suppl1): A143(P583).
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Lin J, Alt paper writing service A, Liersch J, Bretzel RG, Brownlee MA, Hammes HP.
We have demonstrated previously that intracellular formation of the advanced glycation end product (AGE) N-[Epsilon]-(carboxymethyl)lysine (CML) inversely correlates with diabetic vascular complications independently from glycemia (Diabetologia 42, 603, 1999). Here, we studied the effect of benfotiamine, a lipid-soluble thiamine derivative with known AGE-inhibiting properties in-vitro on the intracellular formation of (CML) and methylglyoxal-derived AGE in red blood cells. Blood was collected from 6 Type 1 diabetic patients (2m, 4f, age 31.8 ± 5.5 years; diabetes duration 15.3 ± 7.0 years) before and after treatment with 600 mg/day benfotiamine for 28 days. In addition to HbA1c (HPLC), CML and methylglyoxal were measured using specific antibodies and a quantitative blot technique. While treatment with benfotiamine did not affect HbA1c levels (at entry: 7.18 ± 0.86%; at conclusion 6.88 ± 0.88%; p not significant), levels of CML decreased by 40% (737 ± 51 arbitrary units/mg protein (AU) vs 470 ± 86 AU; p<0.01). The levels of intracellular methylglyoxal were reduced by almost 70% (1628 ± AU vs 500 ± 343 AU; p<0.01). The data indicate that thiamine derivatives are effective inhibitors of both intracellular glycoxidation and AGE formation.