N-甲酰肽受体与 uPAR 在系统性硬化症中的串扰:分子机制、发病作用和治疗机会。

The Crosstalk between N-Formyl Peptide Receptors and uPAR in Systemic Sclerosis: Molecular Mechanisms, Pathogenetic Role and Therapeutic Opportunities.

机构信息

Department of Translational Medical Sciences, University of Naples Federico II, 80138 Naples, Italy.

Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, 80131 Naples, Italy.

出版信息

Int J Mol Sci. 2024 Mar 9;25(6):3156. doi: 10.3390/ijms25063156.

Abstract

Systemic Sclerosis (SSc) is a heterogeneous autoimmune disease characterized by widespread vasculopathy, the presence of autoantibodies and the progressive fibrosis of skin and visceral organs. There are still many questions about its pathogenesis, particularly related to the complex regulation of the fibrotic process, and to the factors that trigger its onset. Our recent studies supported a key role of N-formyl peptide receptors (FPRs) and their crosstalk with uPAR in the fibrotic phase of the disease. Here, we found that dermal fibroblasts acquire a proliferative phenotype after the activation of FPRs and their interaction with uPAR, leading to both Rac1 and ERK activation, c-Myc phosphorylation and Cyclin D1 upregulation which drive cell cycle progression. The comparison between normal and SSc fibroblasts reveals that SSc fibroblasts exhibit a higher proliferative rate than healthy control, suggesting that an altered fibroblast proliferation could contribute to the initiation and progression of the fibrotic process. Finally, a synthetic compound targeting the FPRs/uPAR interaction significantly inhibits SSc fibroblast proliferation, paving the way for the development of new targeted therapies in fibrotic diseases.

摘要

系统性硬化症(SSc)是一种异质性自身免疫性疾病,其特征为广泛的血管病变、自身抗体的存在以及皮肤和内脏器官的进行性纤维化。其发病机制仍有许多问题,特别是与纤维化过程的复杂调节以及触发其发病的因素有关。我们最近的研究支持 N-甲酰肽受体(FPRs)及其与 uPAR 的相互作用在疾病纤维化阶段的关键作用。在这里,我们发现真皮成纤维细胞在 FPRs 激活及其与 uPAR 的相互作用后获得增殖表型,导致 Rac1 和 ERK 的激活、c-Myc 的磷酸化和 Cyclin D1 的上调,从而驱动细胞周期进程。正常和成纤维细胞的比较表明,SSc 成纤维细胞的增殖率高于健康对照组,这表明成纤维细胞增殖的改变可能有助于纤维化过程的起始和进展。最后,一种针对 FPRs/uPAR 相互作用的合成化合物可显著抑制 SSc 成纤维细胞的增殖,为纤维化疾病的新靶向治疗的发展铺平了道路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ab59/10969995/08a74f2ec0ba/ijms-25-03156-g001.jpg

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