Novel inhibitors of α4β1 integrin receptor interactions through library synthesis and screening
摘要:
A library of 2302 small molecule beta-turn mimetics was screened for inhibition of the alpha 4 beta 1 integrin-CS1 splice variant binding interaction. Preliminary data revealed several active ligands, and validation with purified material culminated in the identification of some of the first small molecule ligands (1, IC50 = 5 mu M, and 2, IC50 = 8 mu M) to be reported for this class of integrins. (C) 1998 Elsevier Science Ltd. All rights reserved.
Expedient solid-phase synthesis of putative β-turn mimetics incorporating the i + 1, i + 2, and i + 3 sidechains
作者:Alex A. Virgilio、Stephan C. Schürer、Jonathan A. Ellman
DOI:10.1016/0040-4039(96)01572-9
日期:1996.9
number of putative β-turnmimetics that incorporate sidechain functionality at the i + 1, i + 2, and i + 3positions were synthesized on solid support in high levels of purity and in good overall yields from readily available starting materials. A variety of sidechain functionality, ring sizes, and sidechain stereochemistries were introduced demonstrating the generality of the synthesis method. A significant
Compounds That Activate the Mouse Melanocortin-1 Receptor Identified by Screening a Small Molecule Library Based upon the β-Turn
作者:Carrie Haskell-Luevano、Åsa Rosenquist、Andrew Souers、Kathy C. Khong、Jonathon A. Ellman、Roger D. Cone
DOI:10.1021/jm990190s
日期:1999.10.1
A library of 951 compounds based upon the beta-turn motif were examined for their ability to stimulate the melanocortin-1 receptor. From this screening process, we have identified two compounds possessing low micromolar agonist activity at the mMC1R. The compound EL1 with racemic Nal(2') in the i + 1 position, DPro in the i + 2 position, and Trp in the i + 3 position possesses an EC50 Of 42.5 +/- 6.9 mu M. Compound EL2 with Trp in the i + 1 position, DLys in the i + 2 position, and Phe in the i + 3 position possesses an EC50 value of 63.4 +/- 26.9 mu M. The results of the library screening process are consistent with a hypothesis dating back to the 1980s proposing that a beta-turn conformation involving the melanocortin "Phe-Arg-Trp" core amino acids provides the key recognition element. Additionally, these compounds represent the first nonpeptidic heterocyclic molecules reported to date that are able to activate the MC1R, a melanocyte receptor involved in skin pigmentation and animal coat coloration.