Khalife J, Grzych J M, Pierce R, Ameisen J C, Schacht A M, Gras-Masse H, Tartar A, Lecocq J P, Capron A
Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM, U167-CNRS 624, Strasbourg, France.
J Exp Med. 1990 Sep 1;172(3):1001-4. doi: 10.1084/jem.172.3.1001.
A monoclonal antibody (mAb) directed against a synthetic peptide derived from the sequence of the human immunodeficiency virus type 1 (HIV-1) regulatory protein virion infectivity factor (vif) labeled the surface of Schistosoma mansoni schistosomula by indirect immunofluorescence. Western blotting showed that two S. mansoni proteins of 170 and 65 kD were recognized by the mAb. Sera from 20% of S. mansoni-infected HIV-seronegative individuals tested recognized the PS4 peptide in an ELISA as did sera from S. mansoni-infected rats. Sera from individuals seropositive for HIV-1, but without schistosomiasis, that reacted with the vif peptide also recognized a 170-kD S. mansoni protein. This crossreactive S. mansoni antigen appears to be a target of immunity in vivo since passive transfer of the mAb VIF-CD3 to naive rats had a protective effect against a challenge infection with S. mansoni cercariae.
一种针对源自人类免疫缺陷病毒1型(HIV-1)调节蛋白病毒体感染因子(vif)序列的合成肽的单克隆抗体(mAb),通过间接免疫荧光标记了曼氏血吸虫童虫的表面。蛋白质印迹法显示,该单克隆抗体识别出曼氏血吸虫的两种蛋白质,分子量分别为170 kD和65 kD。在酶联免疫吸附测定(ELISA)中,20%受曼氏血吸虫感染且HIV血清学检测呈阴性的个体的血清,以及受曼氏血吸虫感染的大鼠的血清,均能识别PS4肽。HIV-1血清学检测呈阳性但无血吸虫病的个体的血清,与vif肽发生反应,也识别出一种170-kD的曼氏血吸虫蛋白。这种交叉反应性的曼氏血吸虫抗原似乎是体内免疫的一个靶点,因为将单克隆抗体VIF-CD3被动转移至未感染的大鼠,对曼氏血吸虫尾蚴攻击感染具有保护作用。