Role of Recombinant PnTx2-6 Protein as a Mediator of Vasodilation in Blood Vessels
2017
Park, S.W., Daegu Catholic University, Gyeongsan, Republic of Korea | Kim, S.R., National Institute of Agricultural Science, RDA, Wanju, Republic of Korea | Goo, T.W., Dongguk University College of Medicine, Gyeongju, Republic of Korea | Choi, K.H., National Institute of Agricultural Science, RDA, Wanju, Republic of Korea
The venome of Phoneutria nigriventer spider has been shown to have side effects including severe painful erections that last for hours. PnTx2-6, a toxin from P. nigriventer spider venom, modulates voltage gated Na+ channels and activation of nitric oxide (NO) production. NO is essential for the regulation of blood flow and pressure. Therefore, PnTx2-6 is expected to be effective not only for erectile dysfunction but also for cardiovascular diseases. A previously has reported cDNA clone for PnTx2-6 toxin, which was expressed in E. coli cytoplasm. We created the same clone and expressed it in a bacterial expression system. PnTx2-6 increased the genes expression of superoxide dismutase 1, glutathione peroxidase 1, and sulfiredoxin 1. We hypothesized that recombinant PnTx2-6 may indirectly regulate blood flow and pressure, resulting in NO production in human umbilical vein endothelial cells (HUVEC). These data suggest differential regulation of the vascular ageing process, which may contribute to the anatomic heterogeneity of atherosclerosis. The results of this study may be used for the emergency treatment of sudden cardiovascular disease caused by ageing.
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