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靶向法尼醇 X 受体:从药物化学到疾病治疗。

Targetting farnesoid-X-receptor: from medicinal chemistry to disease treatment.

机构信息

Università di Perugia, Dipartimento di Medicina Clinica e Sperimentale, Via E dal Pozzo, 06122 Perugia, Italy.

出版信息

Curr Med Chem. 2010;17(2):139-59. doi: 10.2174/092986710790112666.

Abstract

The farnesoid X receptor (FXRalpha) is a metabolic nuclear receptor and bile acid sensor expressed in the liver and intestine. Physiological studies have shown that FXRalpha exerts regulatory roles in bile acids, lipid and glucose homeostasis. FXR ligands of steroidal and non-steroidal structure have been described. Both ligand groups have shown limitations in preclinical studies regarding their absorption, metabolism, target interactions and intrinsic toxicity. Inhibition of bile acid synthesis and basolateral transporters in the liver as well as reduction of high density lipoprotein (HDL) in the plasma are the major unwanted effect seen with these ligands. Several FXRalpha modulators are currently being generated with the aim of targeting FXRalpha isoforms by exploiting the relative unselectivity of the ligand binding domain of the receptor. Structure-activity relationship studies have shown that FXRalpha could be activated by structurally different ligands and that receptor occupancy by these ligands generate different patterns of gene activation as a results of specific conformational changes of the receptor or differential dislodgement of co-repressor or recruitment of co-activators. Generation of modulators that selectively target specific FXRalpha responsive elements are an interesting strategy to overcome the limitations of currently available FXR ligands.

摘要

法尼醇 X 受体(FXRalpha)是一种代谢核受体和胆汁酸传感器,在肝脏和肠道中表达。生理研究表明,FXRalpha 在胆汁酸、脂质和葡萄糖稳态中发挥调节作用。已经描述了甾体和非甾体结构的 FXR 配体。这两个配体组在其吸收、代谢、靶标相互作用和内在毒性方面的临床前研究中都显示出局限性。这些配体的主要不良反应是抑制肝脏中的胆汁酸合成和基底外侧转运体以及降低血浆中的高密度脂蛋白(HDL)。目前正在生成几种 FXRalpha 调节剂,目的是通过利用受体配体结合域的相对非选择性来靶向 FXRalpha 同工型。构效关系研究表明,FXRalpha 可以被结构不同的配体激活,并且这些配体对受体的占据会导致基因激活的不同模式,这是由于受体的特定构象变化或共抑制物的差异位移或共激活物的募集。生成选择性靶向特定 FXRalpha 反应元件的调节剂是克服现有 FXR 配体局限性的一种有趣策略。

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