Inhibitory effects of decavanadate on several enzymes and Leishmania tarentolae In Vitro

详细信息	查看全文 | 推荐本文 |

• 作者：Timothy L. Turner ; Victoria H. Nguyen ; Craig C. McLauchlan ; ^{McLauchlan@IllinoisState.edu} ; Zaneta Dymon ; Benjamin M. Dorsey ; Jaqueline D. Hooker ; Marjorie A. Jones ; ^{majone3@IllinoisState.edu}
• 关键词：Decavanadate ; Vanadium complexes ; Phosphatase inhibition ; Leishmania ; Phosphoglycerate mutase
• 刊名：Journal of Inorganic Biochemistry
• 出版年：2012
• 期刊代码：53_01620134
• 类别：ch
• 出版时间：March, 2012
• 卷：108
• 期：Complete
• 页码：96-104
• 文件大小：768 K

摘要

Multiple studies report apparent effects of vanadium on various systems in vivo and in vitro. Vanadium species may be possible deterrents for the growth of the Leishmania parasite, which causes the sometimes deadly diseases known as leishmaniasis. The current studies focus specifically on decavanadate V₁₀O₂₈^6- (V10), which has a potential to be a potent effector for disease treatment. The X-ray structure of a new solvate salt of V10, namely (NH₄)₆V₁₀O₂₈路5H₂O, is also reported. Other vanadium complexes with imidazole carboxylate, anthranilate, or picolinate were also evaluated. The yellow-orange oxoanion, used as the (NH₄)₆V₁₀O₂₈路6H₂O salt, was tested (at 1-100 渭M) directly with two strains of Leishmania tarentolae promastigotes in culture to evaluate the effect on cell viability. Vanadium coordination complexes are known effective inhibitors of phosphatases. Using the artificial phosphatase substrate para-nitrophenylphosphate in the presence of a bovine calf intestine alkaline phosphatase enzyme, V10 (from 5 to 100 渭M) was shown to be a mixed inhibitor for this enzyme and decreased the activity of the other two phosphatases tested. The effect of V10 and the other vanadium complexes on the activity of phosphoglycerate mutase B (PGAM), an important enzyme in glycolysis and gluconeogenesis, was also evaluated. At 10 渭M, V10 was the most potent inhibitor of PGAM, with an apparent reduction of about 50%. Taken together, we speculate that V10 could have a role in treating Leishmania diseases.