申请人:Board of Regents, The University of Texas System
公开号:EP3929207A1
公开(公告)日:2021-12-29
In fibrotic lung fibroblasts, basal levels of p53 protein (and miR-34a) are markedly suppressed, leading to reduced p53-mediated inhibition of uPA and uPAR, or concurrent induction of PAI-1. These changes contribute to excessive FL-fibroblast proliferation and production of extracellular matrix (ECM), and, therefore, pulmonary fibrosis. These processes are reversed by treating the cells, and treating subjects suffering from idiopathic pulmonary fibrosis (IPF) with the small organic molecule nutlin-3a (NTL) or with a peptide, CSP-4 (SEQ ID NO: 1), or variants or derivatives or multimers of this peptide, which increase p53 levels by inhibiting MDM2-mediated degradation of p53 protein. Use of these compounds serves as a new approach to the treatment of IPF, as they restore p53 expression and p53-mediated changes in the uPA-fibrinolytic system in FL-fibroblasts and restrict production and deposition of ECM.
在纤维化的肺成纤维细胞中,p53 蛋白(和 miR-34a)的基础水平受到明显抑制,导致 p53 介导的 uPA 和 uPAR 抑制作用降低,或同时诱导 PAI-1。这些变化导致 FL 成纤维细胞过度增殖和产生细胞外基质(ECM),从而导致肺纤维化。用有机小分子 nutlin-3a(NTL)或多肽 CSP-4(SEQ ID NO:1)或该多肽的变体、衍生物或多聚体治疗细胞和特发性肺纤维化(IPF)患者,可以逆转这些过程。使用这些化合物是治疗 IPF 的一种新方法,因为它们能恢复 p53 的表达和 p53 介导的 FL 成纤维细胞中 uPA-纤维蛋白溶解系统的变化,并限制 ECM 的产生和沉积。