Role of Peritoneal Mesothelial Cells in the Progression of Peritoneal Metastases

Abstract

Simple SummaryPeritoneal mesothelial cells (PMCs) are the first cell layer to encounter peritoneal tumors, thereby affecting their progression. In the past, PMCs were considered a barrier to the intraperitoneal implantation and metastasis of tumors. However, the specific role of PMCs in local tumor progression remains controversial, with evidence demonstrating both inhibiting or promoting effects. The epithelial phenotype of PMCs exhibits an inhibitory effect on abdominal cavity metastasis, whereas the mesenchymal phenotype of PMCs significantly promotes the progression of abdominal cavity tumors. Nevertheless, the details of the interaction between PMCs and tumors to promote local progression and peritoneal dissemination require further study. This article presents a review of the role of PMCs in the progression of abdominal tumors. Based on existing evidence, maintaining the stability of the PMC epithelial phenotype may be a valuable target for inhibiting peritoneal tumor dissemination and local progression.Peritoneal metastatic cancer comprises a heterogeneous group of primary tumors that originate in the peritoneal cavity or metastasize into the peritoneal cavity from a different origin. Metastasis is a characteristic of end-stage disease, often indicative of a poor prognosis with limited treatment options. Peritoneal mesothelial cells (PMCs) are a thin layer of cells present on the surface of the peritoneum. They display differentiated characteristics in embryonic development and adults, representing the first cell layer encountering peritoneal tumors to affect their progression. PMCs have been traditionally considered a barrier to the intraperitoneal implantation and metastasis of tumors; however, recent studies indicate that PMCs can either inhibit or actively promote tumor progression through distinct mechanisms. This article presents a review of the role of PMCs in the progression of peritoneum implanted tumors, offering new ideas for therapeutic targets and related research.