Identification and characterization of a small molecule inhibitor of Fatty Acid binding proteins.

Identification and characterization of a small molecule inhibitor of Fatty Acid binding proteins.
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脂肪酸结合蛋白的小分子抑制剂的鉴定和表征。

DOI:
10.1021/jm900720m
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发表时间:
2009-10-08
影响因子:
7.3
通讯作者:
Bernlohr DA
Bernlohr DA
中科院分区:
医学1区
文献类型:
--
作者:
Hertzel AV;Hellberg K;Reynolds JM;Kruse AC;Juhlmann BE;Smith AJ;Sanders MA;Ohlendorf DH;Suttles J;Bernlohr DA

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小鼠脂质载体AFABP/aP2的分子破坏可改善胰岛素敏感性并保护其免受动脉粥样硬化。由于小分子抑制剂在确定AFABP/aP2作用机制方面可能是有效的,因此筛选了一个化学文库,并确定了1 (HTS01037)作为一种药理学配体,能够从脂质结合腔中取代荧光基团1-苯胺萘- 8-磺酸。结合AFABP/aP2的1的x射线晶体结构显示,该配体与长链脂肪酸在结构上相似。与AFABP/aP2敲除小鼠类似,1抑制3T3-L1脂肪细胞的脂肪分解,减少培养巨噬细胞lps刺激的炎症。1作为AFABP/aP2与激素敏感脂肪酶之间蛋白相互作用的拮抗剂,但不激活巨噬细胞或CV-1细胞中的PPARγ。这些结果表明1是脂肪酸结合的抑制剂和由AFABP/aP2介导的蛋白质相互作用的竞争性拮抗剂。
Molecular disruption of the lipid carrier AFABP/aP2 in mice results in improved insulin sensitivity and protection from atherosclerosis. Since small molecule inhibitors may be efficacious in defining the mechanism(s) of AFABP/aP2 action, a chemical library was screened and identified 1 (HTS01037) as a pharmacologic ligand capable of displacing the fluorophore 1-anilinonaphthalene 8-sulfonic acid from the lipid binding cavity. The X-ray crystal structure of 1 bound to AFABP/aP2 revealed that the ligand binds at a structurally similar position to a long-chain fatty acid. Similar to AFABP/aP2 knockout mice, 1 inhibits lipolysis in 3T3-L1 adipocytes and reduces LPS-stimulated inflammation in cultured macrophages. 1 acts as an antagonist of the protein-protein interaction between AFABP/aP2 and hormone sensitive lipase but does not activate PPARγ in macrophage or CV-1 cells. These results identify 1 as an inhibitor of fatty acid binding and a competitive antagonist of protein-protein interactions mediated by AFABP/aP2.
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