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    • 6. 发明授权
    • Method for inhibiting adenylosuccinate synthetase activity in malignant methylthioadenosine phosphorylase deficient cells
    • 恶性甲基硫代腺苷磷酸化酶缺陷型细胞中腺苷酸琥珀酸合成酶抑制活性的方法
    • US06214571B1
    • 2001-04-10
    • US09199137
    • 1998-11-24
    • Carlos J. CarreraDennis A. CarsonHoward B. CottamTsutomu Nobori
    • Carlos J. CarreraDennis A. CarsonHoward B. CottamTsutomu Nobori
    • C12Q134
    • C12Q1/6886A61K31/198C12N9/1077
    • An in vivo method for depleting mammalian cells of adenosine 5′-monophosphate (AMP) useful in the treatment of certain cancers is provided. According to the method, a population of cells is obtained from a host and assayed for loss of methylthioadenosine phosphorylase (MTAse) activity. MTAse catabolizes methylthioadenosine to adenine for endogenous salvage incorporation into the intracellular AMP pool. The preferred method for assaying loss of MTAse activity is a hybridization technique for detection of a homozygous loss of the gene which encodes MTAse. Hosts having MTAse deficient tumors are treated with a therapeutically effective amount of an agent which inhibits the activity of adenylsuccinate synthetase, which converts inosine 5-monophosphate to AMP, thus depleting the tumor cells of substrates for de novo AMP production. L-alanosine is the preferred ASS inhibitory agent for use in the method of the invention.
    • 提供了用于消除用于治疗某些癌症的腺苷5'-单磷酸(AMP)的哺乳动物细胞的体内方法。 根据该方法,从宿主获得细胞群并测定甲硫基腺苷磷酸化酶(MTAse)活性的损失。 MTAs将甲基硫代腺苷分解为腺嘌呤,用于内源性补救并入细胞内AMP库。 用于测定MTAse活性丧失的优选方法是用于检测编码MTAse的基因的纯合丢失的杂交技术。 具有MTAse缺陷肿瘤的宿主用治疗有效量的抑制腺苷酸琥珀酸合成酶活性的药物进行治疗,其将5-单磷酸肌苷转化为AMP,从而消耗底物的肿瘤细胞用于从头AMP产生。 L-肌氨酸是用于本发明方法的优选的ASS抑制剂。