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Identification of hemolytic and cytotoxic proteins of Actinobacillus pleuropneumoniae by use of monoclonal antibodies.

机译:通过使用单克隆抗体鉴定胸膜肺炎放线杆菌的溶血和细胞毒性蛋白。

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Monoclonal antibodies (MAbs) were raised against extracellular hemolytic and cytotoxic proteins of Actinobacillus pleuropneumoniae serotypes 2 and 9. MAbs were tested for inhibition of hemolytic and cytotoxic activities of the reference strains of A. pleuropneumoniae serotypes 1 to 12. Five MAbs inhibited hemolytic or cytotoxic activities of one or more serotypes and were used to probe Western blots (immunoblots) of cytotoxic and hemolytic culture filtrates of serotypes 1 to 12. The MAbs recognized three different proteins: (i) a protein of approximately 103 kDa that was associated with a weak hemolytic activity and a moderate cytotoxic activity, (ii) a protein of approximately 105 kDa that was associated with a strong hemolytic activity and a strong cytotoxic activity, and (iii) a protein of approximately 120 kDa that was associated with a strong cytotoxic activity but not with hemolytic activity. Serotypes 6, 7, and 12 produced only the 103-kDa protein, and serotype 10 produced only the 105-kDa protein. The other serotypes produced two proteins: serotypes 1, 5, 9, and 11 produced the 103- and 105-kDa proteins, and serotypes 2, 3, 4, and 8 produced the 103- and 120-kDa proteins.
机译:产生了针对胸膜肺炎放线杆菌血清型2和9的细胞外溶血和细胞毒性蛋白的单克隆抗体(MAb)。测试了单克隆抗体对胸膜肺炎放线杆菌血清型1至12的参考菌株的溶血和细胞毒活性的抑制作用。五种MAb抑制了溶血或细胞毒作用具有一种或多种血清型的活性,并用于探测1至12型血清毒性和溶血培养滤液的Western印迹(免疫印迹).MAb识别三种不同的蛋白:(​​i)约103 kDa的蛋白与弱蛋白相关溶血活性和中等的细胞毒性活性;(ii)大约105 kDa的蛋白具有很强的溶血活性和强烈的细胞毒性活性,以及​​(iii)大约120 kDa的蛋白具有很强的细胞毒性活性,但是不具有溶血活性。血清型6、7和12仅产生103 kDa蛋白,血清型10仅产生105 kDa蛋白。其他血清型产生两种蛋白质:血清型1、5、9和11产生103和105 kDa的蛋白质,血清型2、3、4和8产生103和120 kDa的蛋白质。

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