钒作为人体必需的微量元素,在葡萄糖的代谢过程中起着重要作用。大量的体内外研究表明微量元素钒具有“胰岛素样(insulin-mimics)”作用,研究表明它能增加胰岛素的敏感性,是“胰岛素的促进剂(insulin—enhancing agent)”,可用于治疗和缓解1型和2型糖尿病。然而,无机钒盐(如硫酸氧钒、钒酸钠等)脂溶性小,不易吸收,毒性较大,
To study insulino-mimetic effects of bis (α-iurancarboxylato) oxovanadium ( Ⅳ) ( BFOV) , a orally active antidiabetic vanadyl complex, on glucose uptake and lipogenesis in isolated rat adipocytes were determined by using 2-deoxy-D-[3H ]-glucose and D-[3H ]-glucose, respectively. Lipolysis was assayed by free fatty acids (FFA) released from isolated rat adipocytes treated with epinephrine. The results showed that BFOV, similar to insulin, concentration-dependently significantly enhanced the uptake of 2-deoxy-D-[ 3H ]-glucose and the transformation from D-[ 3H ]-glucose to lipid in isolated rat adipocytes, with the EC50 values of (0.31 + 0. 08) mmol · L^-1 and (0.49 + 0. 12) mmol· L^-1, respectively. Moreover, BFOV markedly inhibited FFA release from isolated rat adipocytes treated with epinephrine, and the IC50 value was (0. 30 〉 0. 20) mmol · L^-1 BFOV had insulino-mimetic effects such as enhancing glucose uptake and lipogenesis, as well as inhibiting lipolysis.