Gadek T R, Burdick D J, McDowell R S, Stanley M S, Marsters J C, Paris K J, Oare D A, Reynolds M E, Ladner C, Zioncheck K A, Lee W P, Gribling P, Dennis M S, Skelton N J, Tumas D B, Clark K R, Keating S M, Beresini M H, Tilley J W, Presta L G, Bodary S C
Department of Bioorganic Chemistry, Genentech, One DNA Way, South San Francisco, CA 94080, USA.
Science. 2002 Feb 8;295(5557):1086-9. doi: 10.1126/science.295.5557.1086.
The protein-protein interaction between leukocyte functional antigen-1 (LFA-1) and intercellular adhesion molecule-1 (ICAM-1) is critical to lymphocyte and immune system function. Here, we report on the transfer of the contiguous, nonlinear epitope of ICAM-1, responsible for its association with LFA-1, to a small-molecule framework. These LFA-1 antagonists bound LFA-1, blocked binding of ICAM-1, and inhibited a mixed lymphocyte reaction (MLR) with potency significantly greater than that of cyclosporine A. Furthermore, in comparison to an antibody to LFA-1, they exhibited significant anti-inflammatory effects in vivo. These results demonstrate the utility of small-molecule mimics of nonlinear protein epitopes and the protein epitopes themselves as leads in the identification of novel pharmaceutical agents.
白细胞功能抗原-1（LFA-1）与细胞间黏附分子-1（ICAM-1）之间的蛋白质-蛋白质相互作用对淋巴细胞和免疫系统功能至关重要。在此，我们报告了将负责ICAM-1与LFA-1结合的连续、非线性表位转移至小分子框架的情况。这些LFA-1拮抗剂与LFA-1结合，阻断ICAM-1的结合，并抑制混合淋巴细胞反应（MLR），其效力显著高于环孢素A。此外，与抗LFA-1抗体相比，它们在体内表现出显著的抗炎作用。这些结果证明了非线性蛋白质表位的小分子模拟物以及蛋白质表位本身作为新型药剂鉴定线索的实用性。
