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    • 4. 发明申请
    • REGULATED ANTIGEN DELIVERY SYSTEM (RADS) INVOLVING BACTERIA
    • 涉及细菌的调节性抗原递送系统(RADS)
    • WO0183785A3
    • 2002-06-13
    • PCT/US0113915
    • 2001-04-30
    • UNIV WASHINGTONMEGAN HEALTH INCCURTISS ROY IIITINGE STEVEN A
    • CURTISS ROY IIITINGE STEVEN A
    • C12N15/09A61K39/00A61K39/112A61P37/04C12N1/21C12N15/63C12N15/74C12P21/02C12R1/42A61K45/00
    • C12N15/74A61K2039/523A61K2039/53C12N15/635
    • We describe a regulated antigen delivery system (RADS) that has (a) a vector that includes (1) a gene encoding a desired gene product operably linked to a control sequence, (2) an origin of replication conferring vector replication using DNA polymerase III, and (3) an origin of replication conferring vector replication using DNA polymerase I, where the second origin of replication is operably linked to a control sequence that is repressible by a repressor. The RADS microorganism also has a gene encoding a repressor, operably linked to an activatible control sequence. The RADS described provide high levels of the desired gene product after repression of the high copy number origin of replication is lifted. The RADS are particularly useful as live bacterial vaccines. Also described is a delayed RADS system, in which there is a delay before the high copy number origin is expressed after the repression is lifted. The delayed RADS is also particularly useful for live bacterial vaccines. Also described are several control elements useful for these systems, as well as methods for providing immunity to a pathogen in a vertebrate immunized with the RADS microorganisms.
    • 我们描述了一种调控抗原递送系统(RADS),其具有(a)载体,其包含(1)编码与控制序列可操作地连接的所需基因产物的基因,(2)使用DNA聚合酶III赋予载体复制的复制起点 ,和(3)使用DNA聚合酶I赋予载体复制的复制起点,其中第二复制起点可操作地连接于由阻遏物阻抑的控制序列。 RADS微生物还具有编码阻抑物的基因,可操作地连接于活化的对照序列。 所述的RADS提供高水平的所需基因产物,在抑制高拷贝数复制起点解除之后。 RADS作为活细菌疫苗是特别有用的。 还描述了延迟的RADS系统,其中在压制被解除之后表示高拷贝数原点之前存在延迟。 延迟RADS对活细菌疫苗也特别有用。 还描述了可用于这些系统的若干控制元件,以及用于用RADS微生物免疫的脊椎动物中的病原体提供免疫的方法。