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Immunogenicity of peptides derived from a fibronectin-binding protein ofS-aureus expressed on two different plant viruses

机译:两种不同植物病毒上表达的金黄色葡萄球菌纤连蛋白结合蛋白衍生肽的免疫原性

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The D2 peptide derived from an S. aureus fibronectin-binding protein (FnBP) was expressed on the surface of the icosahedral cowpea mosaic virus (amino acids 1-30 of D2) or on the rod-shaped potato virus X (amino acids 1-38 of D2), termed CPMV-MAST1 and PVX-MAST8, respectively. Mice and rats were immunized subcutaneously with CPMV-MAST1 and mice with PVX-MAST8 in adjuvant and high titres of FnBP-specific antibody were obtained. The mouse IgG was predominantly of the IgG(2a) and IgG(2b) isotypes, which strongly bound complement component Clq, suggesting a TH1-bias in the peptide-specific responses. Sera from mice and rats immunized with CPMV-MAST1 and from mice immunized with PVX-MAST8 were shown to completely inhibit the binding of fibronectin to immobilised recombinant FnBP and rat sera against CPMV-MAST1 were able to block adherence of S. aureus to fibronectin. These studies demonstrate that the D2 peptide is highly immunogenic when expressed on 2 different plant viruses and highlight the potential of plant virus-based vaccines to protect against S, aureus infections. (C) 1999 Elsevier Science Ltd. All rights reserved. [References: 45]
机译:源自金黄色葡萄球菌纤连蛋白结合蛋白(FnBP)的D2肽在二十面体cow豆花叶病毒(D2的氨基酸1-30)或棒状马铃薯病毒X(氨基酸1的表面)上表达D2 38),分别称为CPMV-MAST1和PVX-MAST8。用CPMV-MAST1皮下免疫小鼠和大鼠,用佐剂中PVX-MAST8免疫小鼠,获得高滴度的FnBP特异性抗体。小鼠IgG主要为IgG(2a)和IgG(2b)同种型,它们与补体成分Clq强烈结合,提示肽特异性反应中存在TH1-bias。小鼠和CPMV-MAST1免疫小鼠的血清以及PVX-MAST8免疫小鼠的血清显示完全抑制纤连蛋白与固定化重组FnBP的结合,而针对CPMV-MAST1的大鼠血清则能够阻止金黄色葡萄球菌对纤连蛋白的粘附。这些研究表明,D2肽在两种不同的植物病毒上表达时具有很高的免疫原性,并突显了基于植物病毒的疫苗具有预防金黄色葡萄球菌感染的潜力。 (C)1999 Elsevier ScienceLtd。保留所有权利。 [参考:45]

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