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    • 1. 发明申请
    • COMPOSITIONS AND METHODS FOR BONE FORMATION AND REMODELING
    • 用于骨形成和重建的组合物和方法
    • WO2005115354A3
    • 2007-09-13
    • PCT/US2005017199
    • 2005-05-18
    • ENZO THERAPEUTICS INCZHANG YAZHOULIU PENGLI XIAOFENGZHANG JIESHAN JUFANGENGELHARDT DEANWU DIANQING
    • ZHANG YAZHOULIU PENGLI XIAOFENGZHANG JIESHAN JUFANGENGELHARDT DEANWU DIANQING
    • A61P19/00A61K9/68A61P19/08A61P19/10G01N33/48G01N33/50G01N33/53G01N33/68G06F19/00
    • G01N33/6893A61K38/00G01N33/6887G01N2500/00G01N2800/10G01N2800/108
    • The mechanism by which the high bone mass (HBM) mutation (G171V) of the Wnt coreceptor LRP5 regulates the canonical Wnt signaling was investigated. The mutation was previously shown to reduce Dkk protein-1-mediated antagonism, suggesting that the first YWTD repeat domain where G171 is located may be responsible for Dkk protein-mediated antagonism. However, we found that the third YWTD repeat, but not the first repeat domain, is required for DKK1-mediated antagonism. Instead, we found that the G171V mutation disrupted the interaction of LRP5 with Mesd, a chaperon protein for LRP5/6 molecules on the cell surface. Although the reduction in the level of cell surface LRP5 molecules led to a reduction in Wnt signaling in a paracrine paradigm, the mutation did not appear to affect the activity of coexpressed Wnt in an autocrine paradigm. Together with the observation that osteoblast cells produce autocrine canonical Wnt, Wnt7b, and that osteocytes produce paracrine Dkk1, we believe that the G171V mutation may cause an increase in Wnt activity in osteoblastls by reducing the numnber of targets for paracrine Dkk1 to antagonize without affecting the activity of autocrine Wnt.
    • 研究了Wnt共同受体LRP5的高骨量(HBM)突变(G171V)调节规范Wnt信号传导的机制。 以前显示突变可以降低Dkk蛋白-1介导的拮抗作用,这表明G171位于第一个YWTD重复结构域可能是Dkk蛋白介导的拮抗作用的原因。 然而,我们发现第三个YWTD重复,但不是第一个重复结构域,是DKK1介导的拮抗作用所必需的。 相反,我们发现G171V突变破坏了LRP5与Mesd的相互作用,Mesd是细胞表面上LRP5 / 6分子的伴侣蛋白。 尽管细胞表面LRP5分子水平的降低导致旁分泌范例中Wnt信号传导的降低,但突变似乎不影响共表达Wnt在自分泌范式中的活性。 连同观察到,成骨细胞产生自分泌标准Wnt,Wnt7b,并且该骨细胞产生旁分泌Dkk1,我们认为G171V突变可能通过减少旁分泌Dkk1的靶标的数目来拮抗而引起成骨细胞中Wnt活性的增加而不影响成骨细胞 自分泌Wnt的活性。
    • 5. 发明申请
    • COMPOSITIONS AND METHODS FOR THE INHIBITION OF DISHEVELLED PROTEINS
    • 抑制蛋白质的组合物和方法
    • WO2006107719A2
    • 2006-10-12
    • PCT/US2006011754
    • 2006-03-31
    • ENZO BIOCHEM INCZHENG JIESHAN JUFANGWU DIANQING
    • ZHENG JIESHAN JUFANGWU DIANQING
    • A61K38/17
    • A61K31/00A61K31/164C07K1/00C40B30/02
    • The Wnt signaling pathways are involved in embryo development as well as in M tumorigenesis. Dishevelled (DvI) tra®'duces Wnt signals from the receptor Frizzled (Fz) to downstream components in canonical and non-canonical Wnt signaling pathways, and the DvI , PDZ domain plays an essential role in both pathways, and the DvI PDZ .domain binds directly to Fz receptors. In the present invention using NMR-assisted virtual ligand screening, several compounds were identified and were found to bind to the DvI PDZ domain. Molecular dynamics simulation was used to analyze the binding between the PDZ domain and these compounds in detail. These compounds provide a basis for rational design of high-affinity inhibitors of the PDZ domain, which can block Wnt signaling by interrupting the Fz-DvI interaction.
    • Wnt信号通路参与胚胎发育以及M肿瘤发生。 不规则(DvI)tra®将Wnt信号从受体卷曲(Fz)引发到规范和非规范Wnt信号通路中的下游组分,DvI,PDZ结构域在两个途径中起重要作用,DvI PDZ。 直接与Fz受体结合。 在使用NMR辅助的虚拟配体筛选的本发明中,鉴定出几种化合物,并且发现其与DvI PDZ结构域结合。 分子动力学模拟用于详细分析PDZ结构域与这些化合物的结合。 这些化合物为PDZ结构域的高亲和力抑制剂的合理设计提供了依据,可以通过中断Fz-DvI相互作用来阻断Wnt信号。