[Glu34]human splenin (hSP) was synthesized in a conventional manner by assembling ten peptide fragments followed by deprotection with 1 M trifluoromethanesulfonic acid-thioanisole (molar ration, 1 : 1) in trifluoroacetic acid in the presence of m-cresol and dimethylselenide. Finally, the deprotected peptide was incubated with dithiothreitol to reduce sulfoxide on the methionine side chain. Incubation of peripheral lymphocytes isolated from uremic patients with the synthetic [Glu<34>]hSP showed an enhancing effect on the reduced B-lymphocytes, but synthetic human thymopoietin (hTP) had no effect under the same conditions.
[Glu34]人脾蛋白(h
SP)是以传统方法合成的,先将十个肽片段组合在一起,然后在
间甲酚和
二甲基硒的存在下,用 1 M
三氟甲磺酸-
硫代
苯甲醚(摩尔比为 1:1)在
三氟乙酸中进行脱保护。最后,将脱保护肽与二
硫苏糖醇孵育,以还原蛋
氨酸侧链上的亚砜。用合成的[Glu<34>]h
SP 培养从尿毒症患者体内分离出来的外周淋巴细胞,结果显示其对减少的 B 淋巴细胞有增强作用,但合成的人
胸腺生成素(hTP)在相同条件下没有作用。