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    • 3. 发明申请
    • DNAZYMES FOR INHIBITION OF JAPANESE ENCEPHALITIS VIRUS REPLICATION
    • 用于抑制日本脑炎病毒复制的DNAZYMES
    • WO2006064519A2
    • 2006-06-22
    • PCT/IN2005000423
    • 2005-12-14
    • NAT INST IMMUNOLOGYVRATI SUDHANSHUAPPAIAHGARI MOHAN BABU
    • VRATI SUDHANSHUAPPAIAHGARI MOHAN BABU
    • C12N15/113
    • C12N15/1131C12N2310/12C12N2310/315C12N2310/3519C12N2770/24111
    • The present invention relates to synthetic catalytic DNA molecules or DNAzymes which specifically cleave the RNA sequences of the Japanese Encephalitis Viral genome and is useful in treating Japanese Encephalitis infection. The DNAzyme comprises of a chemical modification, a catalytic domain and two hybridizing arms. The DNAzymes are 29-45 nucleotides in length. The 3' end of the DNAzyme is tethered to a poly-(G)10 tail and the molecule comprises of at least one chemical modification. The chemical modifications are in the form of sugar modification, nucleic acid base modification, and/or phosphate backbone modification. The catalytic DNA molecule inhibits JEV replication in vitro in cultured cells and in vivo in the mouse brain. The present invention also relates to the method of treatment of Japanese encephalitis comprising the steps of introducing the catalytic DNA molecule or DNAzyme into the infected cells under conditions suitable for cleavage and reduction of viral titres.
    • 本发明涉及合成的催化DNA分子或DNA酶,其特异性切割日本脑炎病毒基因组的RNA序列并且可用于治疗日本脑炎感染。 DNAzyme包含化学修饰,催化结构域和两个杂交臂。 DNAzyme的长度为29-45个核苷酸。 脱氧核糖核酸酶的3'末端连接到聚(G)10尾部,并且该分子包含至少一个化学修饰。 化学修饰处于糖修饰,核酸碱基修饰和/或磷酸酯主链修饰的形式。 催化DNA分子在体外培养的细胞中和体内小鼠脑中抑制JEV复制。 本发明还涉及治疗日本脑炎的方法,包括在适于裂解和降低病毒滴度的条件下将催化性DNA分子或脱氧核糖核酸酶引入感染的细胞中的步骤。