抗炎、抗凝双效融合蛋白TAP-SSL5表达载体的构建及其功能研究

被引:11
作者
曲小龙 [1 ]
胡厚源 [1 ]
李敏 [2 ]
黄德兴 [3 ]
梁华 [1 ]
机构
[1] 第三军医大学西南医院心血管内科,重庆市介入心脏病学研究所
[2] 第三军医大学西南医院护理系心理学教研室,重庆市介入心脏病学研究所
[3] Australia Melbourne,BakerIDI Heart&Diabetes
关键词
金黄色葡萄球菌超抗原样蛋白-5; 蜱抗凝血肽; 融合蛋白; P-选择素糖蛋白配体-1; 凝血因子Xa;
D O I
10.16016/j.1000-5404.2010.01.007
中图分类号
R341 [];
学科分类号
摘要
目的构建一种具有抗炎和抗凝双效功能的融合蛋白,并对其功能进行初步鉴定。方法将重组金黄色葡萄球菌超抗原样蛋白-5(staphylococcal superantigen-like protein-5,SSL5)与蜱抗凝血肽(tick anticoagulant peptide,TAP)融合,从金黄色葡萄球NCTC8325菌株中克隆SSL5基因;经DNA重组技术,将编码pelB前导序列、SSL5和TAP的基因重组并克隆于原核表达载体pHOG21中,再转染于大肠杆菌BL21中扩增表达,制备融合蛋白SSL5-TAP或TAP-SSL5,采用流式细胞仪检测融合蛋白是否和SSL5一样,具有与粒细胞表面P-选择素糖蛋白配体-1(P-selectin glycoprotein ligand-1,PSGL-1)结合的特性;采用反应底物法在体外检测融合蛋白对活化的凝血因子X(factor Xa,FXa)活性的抑制作用。结果TAP-SSL5保留了SSL5与PSGL-1结合的特性,并且融合蛋白TAP-SSL5可显著抑制FXa的活性(P<0.01),抑制率达39.5%。结论融合蛋白TAP-SSL5是一种以PSGL-1为靶向的新型抗炎、抗凝双效分子。
引用
收藏
页码:5 / 8
页数:4
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