Synthesis of the octadecapeptide corresponding to positions 32 to 49 of the revised amino acid sequence of thymopoietin II and its effect on low E-rosette forming cells of an aged patient with chronic renal failure.
作者:TAKASHI ABIKO、HIROSHI SEKINO
DOI:10.1248/cpb.30.3271
日期:——
The octadecapeptide, H-Arg-Lys-Asp-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-Ala-Leu-Lys-Arg-OH, corresponding to positions 32 to 49 of the revised amino acid sequence of bovine thymopoietin II was synthesized by the azide condensation of three fragments, (32-36), (37-41) and (42-49), followed by deprotection with hydrogen fluoride in the presence of anisole-thioanisole-o-cresol. The in vitro addition of the synthetic thymopoietin II (32-49) significantly restored the low E-rosette forming capacity of cells from an aged patient with chronic renal failure to normal levels. The in vitro effect of [Gln38, Thr43, Val47]-thymopoietin II (32-49) on the low E-rosette forming capacity of cells from the aged patient with chronic renal failure was also compared with that of the synthetic thymopoietin II (32-49). The [Gln38, Thr43, Val47]-thymopoietin II (32-49) was approximately equipotent with the synthetic thymopoietin II (32-49) at a concentration of 100 μg/ml.
十八肽H-Arg-Lys-Asp-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-Ala-Leu-Lys-Arg-OH,对应于牛胸腺生成素II修订后的氨基酸序列的第32至49位,通过三个片段(32-36)、(37-41)和(42-49)的叠氮化物缩合合成,随后在茴香硫醚-邻甲酚存在下用氢氟酸脱保护。体外添加合成的胸腺生成素II(32-49)显著恢复了来自慢性肾衰竭老年患者的细胞的低E玫瑰花形成能力至正常水平。[Gln38, Thr43, Val47]胸腺生成素II(32-49)对来自慢性肾衰竭老年患者的细胞的低E玫瑰花形成能力的影响也与合成的胸腺生成素II(32-49)进行了比较。在100 μg/ml的浓度下,[Gln38, Thr43, Val47]胸腺生成素II(32-49)与合成的胸腺生成素II(32-49)大致等效。