The nonatetracontapeptide corresponding to the revised amino acid sequence of thymopoietin II was synthesized by assembling ten peptide fragments in solution followed by deprotection with 1 M trifluoromethanesulfonic acid-thioanisole (molar ratio, 1 : 1) in trifluoroacetic acid in the presence of dimethylselenide and m-cresol. The synthetic nonatetracontapeptide was tested for effect on impaired T-lymphocyte transformation by phytohemagglutinin (PHA) in a uremic patient with pneumonia. The synthetic peptide was found to have restoring activity on the impaired PHA stimulation of T-lymphocytes; the minimum effective concentration was 1 μg/ml.
通过溶液中组装十个肽片段,随后在
二甲亚砜和
间甲酚的存在下,用1 M
三氟甲磺酸-
硫代
茴香醚(摩尔比1:1)在
三氟乙酸中脱保护,合成了对应于
胸腺生成素II修正
氨基酸序列的非四十肽。对一名患有肺炎的尿毒症患者的受损T淋巴细胞由植物凝集素(PHA)诱导的转化作用进行了测试。发现合成肽具有恢复受损PHA刺激T淋巴细胞活性的能力;最小有效浓度为1 μg/ml。