Synthesis of six common amino acid sequence fragments of thymosins .BETA.4, .BETA.8 and .BETA.9 and determination of their effects on the low E-rosette forming cells of lupus nephritis patients.
作者:TAKASHI ABIKO、HIROSHI SEKINO
DOI:10.1248/cpb.32.228
日期:——
Six common amino acid sequence fragments of thymosins β4, β8 and β9, H-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-OH (positions 16-26), H-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-OH (positions 31-39), H-Asp-Lys-Pro-Asp-OH (positions 2-5), H-Phe-Asp-Lys-OH (positions 12-14), H-Leu-Pro-OH (positions 28-29) and H-Glu-Ile-OH (positions 8-9), were synthesized by the solution method, and were tested to determine their effects on the low E-rosette forming cells of lupus nephritis patients. Two of the fragments, H-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-OH and H-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-OH, increased E-rosette forming capacity when incubated in vitro with patient's blood though they were less effective than thymosin β9, but the other four peptide fragments, H-Asp-Lys-Pro-Asp-OH, H-Phe-Asp-Lys-OH, H-Leu-Pro-OH and H-Glu-Ile-OH, had no effect.
胸腺素β4、β8和β9常见的六种氨基酸序列片段,即H-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-OH(第16-26位),H-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-OH(第31-39位),H-Asp-Lys-Pro-Asp-OH(第2-5位),H-Phe-Asp-Lys-OH(第12-14位),H-Leu-Pro-OH(第28-29位)和H-Glu-Ile-OH(第8-9位),采用液相法合成,并检测它们对狼疮肾炎患者低E花环形成细胞的影响。其中两个片段,H-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-OH和H-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-OH,与患者血液在体外孵育后增加了E花环形成能力,尽管效果不如胸腺素β9,但另外四个肽片段,H-Asp-Lys-Pro-Asp-OH,H-Phe-Asp-Lys-OH,H-Leu-Pro-OH和H-Glu-Ile-OH,则没有效果。