Synvista Therapeutics Announces Data Further Demonstrating the Value of Haptoglobin Genotyping in Diabetic Patients During A...(compared to placebo. Also HDL functionwa...)

Date:11/11/2008

compared to placebo. Also, HDL function was significantly improved in Hp2-2 individuals who took vitamin E, compared to placebo. Following the study, it was discovered that in those Hp2-2 individuals who had received vitamin E, the incidence of MI after stopping vitamin E treatment significantly increased (0.4 percent on vitamin E vs. 1.8 percent off vitamin E, p=0.03). However, only two months after vitamin E withdrawal, HDL function had deteriorated to its level of dysfunction prior to the initiation of the study. Furthermore, in the 15-month period following the termination of the study, there was little demonstrable difference in the incidence of MI in those Hp2-2 individuals who had received vitamin E and stopped taking it after the end of the study compared to those who received placebo (1.8 percent vitamin E vs. 1.7 percent placebo, p=0.9).

About Hp2-2 Diabetes

The best understood function of haptoglobin, a common serum protein, is to bind free hemoglobin released from red blood cells. Extracellular hemoglobin (hemoglobin not found in red blood cells) is a potent oxidizing agent capable of inflicting oxidative tissue damage. Haptoglobin binds to this extracellular hemoglobin and inhibits hemoglobin induced oxidation. Once hemoglobin is bound to haptoglobin, it is rapidly cleared from the bloodstream by the liver or specialized white blood cells.

Haptoglobin in humans exists as three different proteins that arise from one of three haptoglobin gene combinations in the population, Hp 1-1 (16%), Hp2-2 (36%) and Hp1-2 (48%) For a variety of reasons that are well described in medical literature, Hp2-2 is more effective than Hp1-1 at preventing hemoglobin-induced oxidation in the bloodstream and blood vessel wall.

As a result, scientists have determined that the rate of heart disease is five times higher in Hp2-2 diabetes than in Hp1-1 diabetes. Hp2-2 diabetes also has higher rates of myocardial infarction and re-vascularization within o
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SOURCE Synvista Therapeutics, Inc. Copyright©2008 PR Newswire. All rights reserved

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