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Identification of Secreted Antigen 3 from Babesia gibsoni▿

机译:鉴定来自巴贝斯球菌的分泌抗原3

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摘要

A cDNA expression library of Babesia gibsoni was screened with the serum collected from a dog experimentally infected with B. gibsoni. A novel antigen sharing homology with secreted antigen 1 of B. gibsoni was isolated. The genomic analysis indicated that the BgSA3 gene exists as multicopies in the genome of B. gibsoni. The putative peptide encoded by the BgSA3 gene showed some characteristics of secreted proteins. The serum raised in mice immunized with the recombinant BgSA3 expressed in Escherichia coli could recognize a native parasite protein with a molecular mass of 70 kDa. Moreover, a sandwich enzyme-linked immunosorbent assay with anti-BgSA3 antibodies could detect the circulating BgSA3 in the blood plasma of dogs experimentally infected with B. gibsoni. The identification of BgSA3 provided a useful target for the development of a diagnostic test for detecting specific antibodies and circulating antigens.
机译:用从实验性感染了吉布森牛的狗中收集的血清筛选了巴贝斯吉布森牛的cDNA表达文库。分离出一种新的抗原,其与长双歧杆菌的分泌抗原1具有同源性。基因组分析表明,BgSA3基因在长双歧杆菌基因组中以多份形式存在。 BgSA3基因编码的假定肽显示出分泌蛋白的某些特征。用在大肠杆菌中表达的重组BgSA3免疫的小鼠体内培养的血清可以识别分子量为70 kDa的天然寄生虫蛋白。此外,用抗BgSA3抗体进行的夹心酶联免疫吸附测定可以检测实验感染了吉布森牛的狗血浆中循环的BgSA3。 BgSA3的鉴定为开发检测特异性抗体和循环抗原的诊断测试提供了有用的目标。

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