Tumor metastasis: Mechanistic insights and therapeutic interventions

Abstract

Cancer metastasis is responsible for the vast majority of cancer‐related deaths worldwide. In contrast to numerous discoveries that reveal the detailed mechanisms leading to the formation of the primary tumor, the biological underpinnings of the metastatic disease remain poorly understood. Cancer metastasis is a complex process in which cancer cells escape from the primary tumor, settle, and grow at other parts of the body. Epithelial‐mesenchymal transition and anoikis resistance of tumor cells are the main forces to promote metastasis, and multiple components in the tumor microenvironment and their complicated crosstalk with cancer cells are closely involved in distant metastasis. In addition to the three cornerstones of tumor treatment, surgery, chemotherapy, and radiotherapy, novel treatment approaches including targeted therapy and immunotherapy have been established in patients with metastatic cancer. Although the cancer survival rate has been greatly improved over the years, it is still far from satisfactory. In this review, we provided an overview of the metastasis process, summarized the cellular and molecular mechanisms involved in the dissemination and distant metastasis of cancer cells, and reviewed the important advances in interventions for cancer metastasis.

Abstract

Cancer metastasis is a complex process in which cancer cells escape from the primary tumor, settle and grow at other parts of the body. A variety of stromal cells, immune cells and other molecular components surrounding the tumor provide signals that enhance the metastatic potential of cancer cells. With the deepening understanding of mechanisms of tumorigenesis and metastasis in recent years, a plethora of treatment approaches have been established in patients with metastatic cancer.