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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
    • WO2005115354A2
    • 2005-12-08
    • PCT/US2005/017199
    • 2005-05-18
    • ENZO THERAPEUTICS, INC.ZHANG, YazhouLIU, PengLI, XiaofengZHANG, JieSHAN, JufangENGELHARDT, DeanWU, Dianqing
    • ZHANG, YazhouLIU, PengLI, XiaofengZHANG, JieSHAN, JufangENGELHARDT, DeanWU, Dianqing
    • A61K9/68
    • 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。
    • 3. 发明申请
    • SCLEROSTIN AND THE INHIBITION OF WNT SIGNALING AND BONE FORMATION
    • SCLEROSTIN和WNT信号和骨形成的抑制
    • WO2006102070A2
    • 2006-09-28
    • PCT/US2006/009697
    • 2006-03-17
    • ENZO BIOCHEM, INC.WU, Dianqing, DanLI, Xiaofeng
    • WU, Dianqing, DanLI, Xiaofeng
    • A61K38/17
    • G01N33/6893G01N33/6887G01N2500/00G06F19/12
    • The loss of the SOST gene product sclerosti? leads to sclerosteosis characterized byihigh bone mass (HBM). In this report, we found that sclerostin could antagonize canonical, Wnt signaling in human embryonic kidney A293 cells and mouse osteoblastic MC3T3 cells. This sclerostin-mediated antagonism could be reversed by over-expression of Wnt coreceptor LRP5. In addition, we found that sclerostin bound to LRP5 as well as LRP6 and identified the first two YWTD-EGF repeat domains of LRP5 as being responsible for the binding. Although these two repeat domains are required for transducing canonical Wnt signals, canonical Wnt did not appear to compete with sclerostin for binding to LRP5. Examination of the expression of sclerostin and Wnt7b, an autocrine canonical Wnt, during primary calvarial osteoblast differentiation revealed that sclerostin is expressed at the late stages of osteoblast differentiation coinciding with the expression of osteogenic marker osteocalcin and trailing after the expression of Wnt7b. Given the plethora of evidence indicating that canonical Wnt signaling stimulates osteogenesis, we believe that the HBM phenotype associated with the loss of sclerostin may at least in part be attributed to an increase in canonical Wnt signaling resulting from the reduction in sclerostin-mediated Wnt antagonism.
    • SOST基因产物硬化的损失? 导致以高骨质量(HBM)为特征的硬皮病。 在本报告中,我们发现硬皮蛋白可以拮抗人类胚胎肾A293细胞和小鼠成骨细胞MC3T3细胞中的典型Wnt信号传导。 这种硬脂蛋白介导的拮抗作用可以通过Wnt共同受体LRP5的过度表达来逆转。 此外,我们发现硬骨素与LRP5以及LRP6结合,并鉴定出LRP5的前两个YWTD-EGF重复结构域负责结合。 虽然这两个重复结构域是转导规范Wnt信号所必需的,但是典型的Wnt似乎没有与硬皮蛋白竞争结合LRP5。 在原发性颅骨成骨细胞分化过程中,考察了sclerostin和Wnt7b(一种自分泌标准Wnt)的表达,表明硬骨素在成骨细胞分化后期表达,与成骨标志物骨钙素表达相符,Wnt7b表达后表达。 鉴于许多证据表明典型的Wnt信号传导刺激成骨,我们认为与硬化蛋白的丧失有关的HBM表型可能至少部分归因于由于硬骨素介导的Wnt拮抗作用降低导致的典型Wnt信号传导的增加。
    • 6. 发明申请
    • SULFATION OF WNT PATHWAY PROTEINS
    • WNT途径蛋白的硫化
    • WO2013003178A1
    • 2013-01-03
    • PCT/US2012/043451
    • 2012-06-21
    • ENZO BIOCHEM, INC.RABBANI, JoshuaDONEGAN, James J.LI, Xiaofeng
    • RABBANI, JoshuaDONEGAN, James J.LI, Xiaofeng
    • C07K14/51C07K7/04
    • A61K38/1709A61K38/08A61K38/10C07K14/47C07K14/51C07K14/705C07K14/71
    • Provided is a composition comprising a peptide comprising amino acids and/or amino acid analogs comprising a continuous sequence of a sclerostin fragment comprising Tyr43 or Tyr213. Also provided is a composition comprising a peptide comprising less than about 75 amino acids and/or amino acid analogs including an amino acid or amino acid analog capable of being sulfated, where the composition is capable of inhibiting sclerostin binding to an LRP. Further provided is a composition comprising a peptide comprising less than about 75 amino acids and/or amino acid analogs including an amino acid or amino acid analog capable of being post-translationally sulfated, where the composition is capable of inhibiting binding of a protein ligand comprising a sulfation site to its binding partner. Additionally provided is a method of enhancing a Wnt signaling pathway comprising contacting an LRP5/6 receptor in the Wnt signaling pathway with either of the above-described compositions that comprise a sequence of a sclerostin fragment or is capable of inhibiting sclerostin binding to an LRP, where the tyrosine or tyrosine analog is not sulfated, in a manner sufficient to enhance the Wnt signaling pathway. Further provided is a method of treating a subject having a disease exacerbated by inhibition of a Wnt signaling pathway comprising administering either of the above-described compositions that comprise a sequence of a sclerostin fragment or is capable of inhibiting sclerostin binding to an LRP, where the tyrosine or tyrosine analog is not sulfated, to the subject in a manner sufficient to reduce the inhibition of the Wnt signaling pathway. Also, a method of inhibiting binding of a protein ligand comprising a sulfation site to its binding partner is provided. The method comprises adding the above-described composition that is capable of inhibiting binding of a protein ligand to its binding partner to the protein ligand and its binding partner in a manner sufficient to inhibit binding of the protein ligand to its binding partner.
    • 提供了包含包含氨基酸和/或氨基酸类似物的肽的组合物,其包含包含Tyr43或Tyr213的硬化蛋白片段的连续序列。 还提供了包含包含少于约75个氨基酸和/或氨基酸类似物的肽的组合物,其包含能够被硫酸化的氨基酸或氨基酸类似物,其中该组合物能够抑制与LRP结合的硬皮蛋白。 还提供了一种组合物,其包含包含小于约75个氨基酸和/或氨基酸类似物的肽,其包含能够翻译后硫酸化的氨基酸或氨基酸类似物,其中组合物能够抑制蛋白质配体的结合,所述蛋白质配体包含 硫酸化位点到其结合配偶体。 另外提供了增强Wnt信号传导途径的方法,包括使Wnt信号传导途径中的LRP5 / 6受体与包含硬化蛋白片段序列的任一上述组合物接触或能够抑制硬化蛋白酶与LRP结合, 其中酪氨酸或酪氨酸类似物不被硫酸化,以足以增强Wnt信号通路的方式。 还提供了一种治疗具有通过抑制Wnt信号传导途径加重疾病的受试者的方法,包括施用包含硬化蛋白酶片段序列的上述组合物或能够抑制硬化蛋白与LRP的结合,其中 酪氨酸或酪氨酸类似物不以足以降低Wnt信号传导途径抑制的方式硫酸化。 此外,提供了抑制包含硫酸化位点的蛋白质配体与其结合配偶体的结合的方法。 该方法包括加入能够以足以抑制蛋白质配体与其结合配偶体的结合的方式将蛋白质配体与其结合配偶体结合至蛋白质配体及其结合配偶体的上述组合物。
    • 7. 发明申请
    • NONLINEAR PULSE OSCILLATOR METHODS AND APPARATUS
    • 非线性脉冲振荡器方法和装置
    • WO2007030485A2
    • 2007-03-15
    • PCT/US2006/034634
    • 2006-09-06
    • PRESIDENT AND FELLOWS OF HARVARD COLLEGERICKETTS, DavidHAM, DonheeLI, Xiaofeng
    • RICKETTS, DavidHAM, DonheeLI, Xiaofeng
    • H03B5/18
    • H03L7/099H03B5/1221H03B5/1234H03B5/1243H03K5/12
    • Methods and apparatus for implementing stable self-starting and self-sustaining high-speed electrical nonlinear pulse (e.g., soliton, cnoidal wave, or quasi-soliton) oscillators. Chip- scale nonlinear pulse oscillator devices may be fabricated using III- V semiconductor materials (e.g., GaAs) to attain soliton pulse widths on the order of a few picoseconds or less (e.g., 1 to 2 picoseconds, corresponding to frequencies of approximately 300 GHz or greater). In one example, a nonlinear pulse oscillator is implemented as a closed loop structure that comprises a nonlinear transmission line and a distributed nonlinear amplifier arrangement configured to provide a self-adjusting gain as a function of an average voltage of the oscillator signal. In another example, a nonlinear oscillator employing a lumped nonlinear amplifier and a nonlinear transmission line in a closed loop arrangement may be used in combination with a two-port nonlinear transmission line that provides additional pulse compression for pulses circulating in the oscillator.
    • 用于实现稳定的自启动和自持的高速电非线性脉冲(例如,孤子,cnoidal波或准孤子)振荡器的方法和装置。 可以使用III-V半导体材料(例如,GaAs)来制造芯片级非线性脉冲振荡器器件,以获得几皮秒或更少数量级的孤子脉冲宽度(例如,1到2皮秒,对应于大约300GHz的频率 或更大)。 在一个示例中,非线性脉冲振荡器被实现为闭环结构,其包括非线性传输线和配置为提供作为振荡器信号的平均电压的函数的自调节增益的分布式非线性放大器布置。 在另一示例中,采用集总非线性放大器和闭环布置中的非线性传输线的非线性振荡器可以与为在振荡器中循环的脉冲提供额外的脉冲压缩的双端口非线性传输线路组合使用。
    • 8. 发明申请
    • ELECTRONIC FLAMELESS CANDLE
    • 电子无焰蜡烛
    • WO2014139483A1
    • 2014-09-18
    • PCT/CN2014/073557
    • 2014-03-17
    • LI, Xiaofeng
    • LI, Xiaofeng
    • F21S13/00F21V35/00H05B37/00F21Y101/02
    • F21S10/04A61L9/03A61L2209/111A61L2209/12A61L2209/133F21S6/001F21S9/02F21S10/043F21V23/04F21V23/0471F21V33/0088F21V33/0092F21W2121/00F21Y2101/00F21Y2113/13F21Y2115/10
    • An electronic flameless candle(10) including a body (20) having a top surface(22), a bottom surface(24), a sidewall(26) between the top surface(22) and the bottom surface(24), and a cavity(48) defined by the top surface(22), the bottom surf ace(24) and the sidewall(26), the body(20) configured in shape and size to simulate a true flame candle. The candle (10) may also include a light source(56) operably connected to the body(20), the light source(56) electrically operated to illuminate in a way that simulates a natural flicker of a real candle flame. The candle (10) may also include a scent component(40), operably connected to the body(20), the scent component(40) configured to emit a scent when heated and/or a sensor component(70), operably connected to the body(20), the sensor component(70) configured to sense an environmental condition and affect a mode of the light source(56) upon the sensing of the environmental condition.
    • 一种包括具有顶表面(22),底表面(24),在顶表面(22)和底表面(24)之间的侧壁(26))的主体(20)的电子无焰蜡烛(10) 由顶表面(22),底部冲浪(24)和侧壁(26)限定的空腔(48),主体(20)被配置成模拟真实火焰蜡烛的形状和尺寸。 蜡烛(10)还可以包括可操作地连接到主体(20)的光源(56),光源(56)电动操作以照亮模拟自然闪烁的真实蜡烛火焰的方式。 蜡烛(10)还可以包括可操作地连接到主体(20)的香味组分(40),被配置为在加热时发出气味的气味组分(40)和/或传感器组件(70),可操作地连接到 所述主体(20),所述传感器部件(70)被配置为感测环境状况并且在感测到所述环境条件时影响所述光源(56)的模式。