METHODS FOR CONSTRUCTING ANTIBIOTIC RESISTANCE FREE VACCINES
    10.
    发明公开
    METHODS FOR CONSTRUCTING ANTIBIOTIC RESISTANCE FREE VACCINES 有权
    VERFAHREN ZUM HERSTELLEN VON IMPFSTOFFEN OHNE抗生素治疗

    公开(公告)号:EP1789559A4

    公开(公告)日:2009-02-11

    申请号:EP05808671

    申请日:2005-08-15

    申请人: UNIV PENNSYLVANIA

    摘要: A method of engineering a recombinant Listeria vaccine strain to express an HPV antigen, comprising: contacting a Listeria strain auxotrophic for D-alanine synthesis comprising mutations in a D-alanine racemase and a D-amino acid transferase gene in the Listeria's chromosome with a plasmid, the plasmid comprising a first nucleic acid sequence encoding a polypeptide that comprises a human papilloma virus E7 antigen, and a second nucleic acid sequence encoding a D-alanine racemase, wherein the plasmid does not confer antibiotic resistance to the auxotrophic Listeria vaccine strain, whereby the auxotrophic Listeria strain takes up the plasmid and the D-alanine racemase complements the mutation in the D-alanine racemase gene, wherein the auxotrophic Listeria strain grows in the absence of D-alanine, and wherein the first nucleic acid sequence is operably linked to a prokaryotic promoter, thereby engineering a recombinant Listeria vaccine strain to express the HPV antigen.

    摘要翻译: 一种重组利斯特氏菌疫苗菌株的表达HPV抗原的方法,其特征在于包括:将具有营养缺陷型营养缺陷型营养缺陷型D-丙氨酸合成,其包含利斯特氏菌染色体中的D-丙氨酸消旋酶和D-氨基酸转移酶基因中的突变, ,所述质粒包含编码包含人乳头状瘤病毒E7抗原的多肽的第一核酸序列和编码D-丙氨酸消旋酶的第二核酸序列,其中所述质粒不赋予营养缺陷型李斯特菌属疫苗株抗生素抗性,由此 营养缺陷型李斯特氏菌菌株吸收质粒,D-丙氨酸消旋酶补充D-丙氨酸消旋酶基因中的突变,其中营养缺陷型李斯特菌属菌株在不存在D-丙氨酸的情况下生长,并且其中第一核酸序列可操作地连接到 一种原核启动子,从而工程化重组利斯特氏菌疫苗株,以表达HPV抗原。