The extracellular matrix protein type I collagen and fibronectin are regulated by β-arrestin-1/endothelin axis in human ovarian fibroblasts

The invasive and metastatic spread of serous ovarian cancer (SOC) results from the cooperative interactions between cancer and stroma, which include extracellular matrix (ECM) and cellular components, including cancer-associated fibroblasts (CAFs). Soluble factors secreted by cancer and stromal cells contribute to stroma remodeling through the secretion of ECM proteins, providing a favorable environment for cancer cell dissemination. The peptide endothelin-1 (ET-1), through two G protein-coupled receptors (GPCR), endothelin receptor type A (ETAR) and B (ETBR), acts on both cancer and stromal cells, engaging the protein β-arrestin1 (β-arr1), to bolster SOC progression. However, its role in the regulation of the ECM proteins by ovarian fibroblasts is not understood. This study delves into the role of ET-1 as a regulator of type I collagen (Col1) and fibronectin (FN).