ABSTRACT
Cancer-associated fibroblasts(CAFs) are important cellular components of the tumor microenvironment. They have a variety of cellular sources, including resident fibroblasts, bone marrow mesenchymal stem cells and epithelial cells, which contribute to the development of tumors. CAFs play important roles in cancer initiation, progression, and metastasis,which can promote tumor proliferation and migration, promote tumor angiogenesis, regulate tumor immunity, and improve tumor drug resistance. Therefore, it is a promising development direction in tumor-targeted therapy. CAFs regulate the biological characteristics of tumor cells and other stromal cells through cell-to-cell contact, releases many regulatory factors and synthesizes and reshapes the extracellular matrix, and influences the occurrence and development of cancer in these ways. However, there are still many unresolved issues on the way in targeting CAFs for tumor therapy. For example, the origin and functional heterogeneity of CAFs still need to be further explored. This review mainly focuses on the summary of origin of CAFs, their roles in tumor development and the potential application in cancer targeted therapy, which will help to deepen the understanding of the roles of CAFs in cancer development and future cancer treatment.