Incorporation of Indoylated Phenylalanine Yields a Sub-Micromolar Selective Melanocortin-4 Receptor Antagonist Tetrapeptide.

Incorporation of Indoylated Phenylalanine Yields a Sub-Micromolar Selective Melanocortin-4 Receptor Antagonist Tetrapeptide.
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DOI:
10.1021/acsomega.2c03307
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发表时间:
2022-08-09
期刊:
影响因子:
4.1
通讯作者:
Haskell-Luevano, Carrie
Haskell-Luevano, Carrie
中科院分区:
化学3区
文献类型:
--
作者:
Ericson, Mark D.;Larson, Courtney M.;Freeman, Katie T.;Nicke, Lennart;Geyer, Armin;Haskell-Luevano, Carrie

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黑皮质素家族参与许多生理功能,包括色素沉着、类固醇生成和食欲。中枢表达的黑皮质素-3和黑皮质素-4受体(MC 3R和MC 4 R)在能量稳态中具有重叠但不同的作用。本文中,先前报道具有MC 3R激动剂和MC 4 R拮抗剂活性的四肽先导化合物[Ac-Arg-Arg-(pI)DPhe-Tic-NH 2]的第三和第四位被吲哚基化苯丙氨酸(Wsf/Wrf)残基取代,试图产生受体亚型选择性化合物。在第三个位置,d-氨基酸是黑皮质素激动剂活性所需的,而l-和d-残基都导致MC 4 R拮抗剂活性。这些结果表明,在支架的第三位置处的1-吲哚基化苯丙氨酸残基可以产生超过MC 3R选择性拮抗剂配体的MC 4 R,导致可以用于新的MC 4 R配体的取代模式,所述新的MC 4 R配体可以用于探测MC 4 R的体内活性而不涉及MC 3R。
The melanocortin family is involved in many physiological functions, including pigmentation, steroidogenesis, and appetite. The centrally expressed melanocortin-3 and melanocortin-4 receptors (MC3R and MC4R) possess overlapping but distinct roles in energy homeostasis. Herein, the third and fourth positions of a tetrapeptide lead compound [Ac-Arg-Arg-(pI)DPhe-Tic-NH2], previously reported to possess MC3R agonist and MC4R antagonist activities, were substituted with indoylated phenylalanine (Wsf/Wrf) residues in an attempt to generate receptor subtype selective compounds. At the third position, d-amino acids were required for melanocortin agonist activity, while both l- and d-residues resulted in MC4R antagonist activity. These results indicate that l-indoylated phenylalanine residues at the third position of the scaffold can generate MC4R over MC3R selective antagonist ligands, resulting in a substitution pattern that may be exploited for novel MC4R ligands that can be used to probe the in vivo activity of the MC4R without involvement of the MC3R.
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发表时间: 1993-09-15
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