Solution synthesis of human neuropeptide Y (hNPY).
作者:Seishi ONO、Kouki KITAGAWA、Shiroh FUTAKI、Shinya KIYAMA、Yoshihiro OOI、Tadashi AKITA、Shunichi HIGASHIDE、Kazutomo INOUE、Syoichiro SUMI、Takayoshi TOBE
DOI:10.1248/cpb.37.1925
日期:——
Human neuropeptide Y (hNPY) was synthesized in a conventional manner by assembling seven peptide fragments followed by reduction of the Met(O) residue with phenylthiotrimethylsilane and subsequent deprotection with 1 M trimethylsilyl trifluoromethanesulfonate (TMSOTf)-thioanisole in trifluoroacetic acid (TFA). Alternatively, deprotection was performed in a two-step manner; first, treatment with 1 M trimethylsilyl bromide-thioanisole in TFA, and then with 1 M TMSOTf-thioanisole in TFA. After purification by gel-filtration on Sephadex G-25, followed by reversed-phase high-performance liquid chromatography, a highly purified sample of synthetic hNPY was obtained in both cases.When administered in dogs, synthetic hNPY was as active as porcine NPY in terms of the effects on systemic arterial blood pressure, pancreatic blood flow, and superior mesentric artery (SMA) blood flow. Met(O)17-hNPY was found to be as active as the parent sample in these bioassays.
人神经肽 Y(hNPY)的合成采用传统方法,先将七个肽片段组合在一起,然后用苯基硫代三甲基硅烷还原 Met(O)残基,再用 1 M 三甲基硅基三氟甲磺酸盐(TMSOTf)-硫代苯甲醚在三氟乙酸(TFA)中进行脱保护。另一种方法是分两步进行脱保护:首先用 1 M 三甲基硅溴-硫代苯甲醚在 TFA 中进行处理,然后用 1 M 三甲基硅氧烷-硫代苯甲醚在 TFA 中进行处理。在狗体内给药时,合成 hNPY 对全身动脉血压、胰腺血流和心室上动脉(SMA)血流的影响与猪 NPY 一样有效。在这些生物测定中,Met(O)17-hNPY的活性与母体样本相同。