人髓系细胞触发受体-1模拟多肽的筛选和鉴定

Screening and identification of human triggering receptor expressed on myeloid cells-1 mimetic peptides

摘要:

目的寻找能特异性与人髓系细胞触发受体-1（TREM-1）蛋白结合并抑制其传导通路的多肽。方法克隆、表达和纯化TREM-1功能区蛋白，并以之为诱饵蛋白，筛选随机噬菌体展示肽库。经过4轮生物淘洗，通过ELISA方法和单核细胞ELISA方法分析噬菌体克隆与TREM-1蛋白的亲和力。化学合成模拟多肽，检测其对盲肠结扎穿刺（CLP）小鼠的治疗效果。结果成功找到5种噬菌体克隆，ELISA法和细胞ELISA均阳性。应用化学方法合成的模拟多肽HYGMTHPNTMsH能降低CLP小鼠的死亡率。结论模拟多肽HYGMTHPNTMSH对脓毒症小鼠有保护作用。

Abstract:

Objective To find mimetic peptides which bind specifically with triggering receptor expressed on myeloid cells-1 (TREM-1) and inhibit the TREM-1 pathway. Methods The functioning region of TREM-1 protein was cloned,expressed and purified. With the recombin