We synthesized a series of epoxysuccinic acid derivatives and evaluated their in vitro cathepsin K inhibitory activity The screening results show that the potency of compounds 9e,9d,9p,9j and 9k （IC_（50）≤0.005μmo...We synthesized a series of epoxysuccinic acid derivatives and evaluated their in vitro cathepsin K inhibitory activity The screening results show that the potency of compounds 9e,9d,9p,9j and 9k （IC_（50）≤0.005μmol/L） were equal to or greater than that of the lead compound 9a.Less hydrophobic compounds showed weaker potency,which can be explained by the hydrophobic nature of the cathepsin K binding pockets.展开更多
组织蛋白酶K(Cathepsin K,CTSK)属于半胱氨酸蛋白酶,是抗骨质疏松药物研发的重要靶点,在破骨细胞中特异性高表达,对降解骨胶原基质至关重要。与临床常用的抑制骨吸收药物相比,CTSK抑制剂具有在不影响骨形成的情况下有效减少骨吸收的优...组织蛋白酶K(Cathepsin K,CTSK)属于半胱氨酸蛋白酶,是抗骨质疏松药物研发的重要靶点,在破骨细胞中特异性高表达,对降解骨胶原基质至关重要。与临床常用的抑制骨吸收药物相比,CTSK抑制剂具有在不影响骨形成的情况下有效减少骨吸收的优点。迄今为止,CTSK抑制剂的研发均因安全性不足而失败,原因是对皮肤和血管系统等非骨组织造成副作用。传统中药富含抑制骨吸收的活性物质,一些文献表明中药来源的CTSK抑制剂抗骨质疏松作用明显,且没有明显的不良反应。笔者拟综述近10年中药来源的CTSK抑制剂的研究进展,资料主要来源于中国知网、万方和Web of Science数据库,为开发中药CTSK抑制剂和治疗CTSK相关疾病提供参考。展开更多
Objective To establish an effective assay to access the effects of natural products on cathepsin K for screening antiosteoporosis drugs. Methods To obtain the purified cathepsin K, we cloned the target fragment fro...Objective To establish an effective assay to access the effects of natural products on cathepsin K for screening antiosteoporosis drugs. Methods To obtain the purified cathepsin K, we cloned the target fragment from the mRNA of human osteosacoma cell line MG63 and demonstrated its correctness through DNA sequencing. Cathepsin K was expressed in a high amount in E.coli after IPTG induction, and was purified to near homogenetity through resolution and column purification. The specificity of the protein was shown by Western blotting experiment. The biological activity of the components in the fermentation broth was assayed by their inhibitory effects on cathepsin K and its analog papain. Results With the inhibition of papain activity as a screen index, the fermentation samples of one thousand strains of fungi were tested and 9 strains among them showed strong inhibitory effects. The crude products of the fermentation broth were tested for their specific inhibitory effects on the purified human cathepsin K, the product of fungi 2358 shows the highest specificity against cathepsin K. Conclusions The compounds isolated from fungi 2358 show the highest biological activity and are worth further structure elucidation and function characterization.展开更多
基金supported by the National High-Tech Research and Development Program of China(No.2012AA020301)
文摘We synthesized a series of epoxysuccinic acid derivatives and evaluated their in vitro cathepsin K inhibitory activity The screening results show that the potency of compounds 9e,9d,9p,9j and 9k （IC_（50）≤0.005μmol/L） were equal to or greater than that of the lead compound 9a.Less hydrophobic compounds showed weaker potency,which can be explained by the hydrophobic nature of the cathepsin K binding pockets.
文摘组织蛋白酶K(Cathepsin K,CTSK)属于半胱氨酸蛋白酶,是抗骨质疏松药物研发的重要靶点,在破骨细胞中特异性高表达,对降解骨胶原基质至关重要。与临床常用的抑制骨吸收药物相比,CTSK抑制剂具有在不影响骨形成的情况下有效减少骨吸收的优点。迄今为止,CTSK抑制剂的研发均因安全性不足而失败,原因是对皮肤和血管系统等非骨组织造成副作用。传统中药富含抑制骨吸收的活性物质,一些文献表明中药来源的CTSK抑制剂抗骨质疏松作用明显,且没有明显的不良反应。笔者拟综述近10年中药来源的CTSK抑制剂的研究进展,资料主要来源于中国知网、万方和Web of Science数据库,为开发中药CTSK抑制剂和治疗CTSK相关疾病提供参考。
文摘Objective To establish an effective assay to access the effects of natural products on cathepsin K for screening antiosteoporosis drugs. Methods To obtain the purified cathepsin K, we cloned the target fragment from the mRNA of human osteosacoma cell line MG63 and demonstrated its correctness through DNA sequencing. Cathepsin K was expressed in a high amount in E.coli after IPTG induction, and was purified to near homogenetity through resolution and column purification. The specificity of the protein was shown by Western blotting experiment. The biological activity of the components in the fermentation broth was assayed by their inhibitory effects on cathepsin K and its analog papain. Results With the inhibition of papain activity as a screen index, the fermentation samples of one thousand strains of fungi were tested and 9 strains among them showed strong inhibitory effects. The crude products of the fermentation broth were tested for their specific inhibitory effects on the purified human cathepsin K, the product of fungi 2358 shows the highest specificity against cathepsin K. Conclusions The compounds isolated from fungi 2358 show the highest biological activity and are worth further structure elucidation and function characterization.
