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    • 26. 发明授权
    • Compounds for inhibition of ceramide-mediated signal transduction
    • 用于抑制神经酰胺介导的信号转导的化合物
    • US06323201B1
    • 2001-11-27
    • US08858778
    • 1997-05-19
    • Dennis A. CarsonHoward Cottam
    • Dennis A. CarsonHoward Cottam
    • C07D41306
    • C07D239/545C07D213/76C07D217/24C07D239/96C07D473/06C07D473/10C07D475/02C07D513/04
    • Novel, heterocyclic compounds having at least one ring nitrogen, disclosed side chains and, in some embodiments, an oxygen ortho to the ring nitrogen inhibit inflammatory responses associated with TNF-&agr; and fibroblast proliferation in vivo and in vitro. The compounds of the invention neither appreciably inhibit the activity of cAMP phosphodiesterase nor the hydrolysis of phosphatidic acid, and are neither cytotoxic nor cytostatic. Preferred compounds of the invention are esters. Methods for the use of the novel compounds to inhibit ceramide-mediated intracellular responses in stimuli in vivo (particularly TN-&agr;) are also described. The methods are expected to be of use in reducing inflammatory responses (for example, after angioplasty), in limiting fibrosis (for example, of the liver in cirrhosis), in inhibiting cell senescence, cell apoptosis and UV induced cutaneous immune suppression. Compounds having enhanced water solubility are also described.
    • 新颖的,具有至少一个环氮的杂环化合物,在一些实施方案中,环氮原子上的氧被抑制与体内和体外TNF-α和成纤维细胞增殖相关的炎性反应。 本发明的化合物既不明显地抑制cAMP磷酸二酯酶的活性也不抑制磷脂酸的水解,既不是细胞毒性的也不是细胞抑制的。 本发明优选的化合物是酯。 还描述了使用新化合物抑制体内刺激中神经酰胺介导的细胞内应答的方法(特别是TN-α)。 预期这些方法可用于减少炎症反应(例如血管成形术后),限制纤维化(例如肝硬化),抑制细胞衰老,细胞凋亡和UV诱导的皮肤免疫抑制。 还描述了具有增强的水溶性的化合物。
    • 27. 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。