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Animal study demonstrates that oral D-pinitol reduces lipids and improves lipoprotein profiles in diabetic rats, suggesting a potential therapeutic role against diabetic dyslipidemia.
D-pinitol (3-O-methyl-chiroinositol), an active principle of the traditional antidiabetic plant, Bougainvillea spectabilis, is claimed to exert insulin-like effects. This study was undertaken to evaluate the effect of D-pinitol on lipids and lipoproteins in streptozotocin (STZ)-induced diabetic Wistar rats. Rats were made type II diabetic by single intraperitoneal injection of STZ at a dose of 40 mg/kg body weight. STZ-induced diabetic rats showed significant (p < 0.05) increase in the levels of blood glucose and total cholesterol, triglycerides, free fatty acids, and phospholipids in serum, liver, kidney, heart, and brain. The levels of low-density lipoprotein (LDL) and very low-density lipoprotein (VLDL) cholesterol were significantly increased, and the level of high-density lipoprotein (HDL) cholesterol was significantly decreased in diabetic rats Oral administration of D-pinitol to STZ-induced diabetic rats showed significant (p < 0.05) decrease in the levels of blood glucose and total cholesterol, triglycerides, free fatty acids, and phospholipids in serum, liver, kidney, heart, and brain. The D-pinitol also lowered significantly (p < 0.05) LDL and VLDL cholesterol levels and increased significantly (p < 0.05) HDL cholesterol levels in the serum of diabetic rats. Thus, the present study clearly showed the antihyperlipidemic effect of D-pinitol in STZ-induced type II diabetic rats.
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Geethan et al. (2008) studied this question.
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