Exosomal regulation of cellular reprogramming and polarization in the tumor microenvironment.

The reprogramming and polarization of cells within the tumor microenvironment (TME) are fundamental processes that critically influence the dynamics of tumor progression and response to therapy. These processes can either promote tumor evasion and metastasis or mount effective anti-tumor responses, thereby determining the overall tumor landscape. At the center of this dynamic interplay are exosomes that facilitate crucial intercellular communication by transferring bioactive molecules such as proteins, lipids, and nucleic acids. While the roles of individual TME components in cancer progression have been extensively characterized, the precise mechanisms through which the reprogramming of these elements favors tumor advancement remain inadequately elucidated. This review investigates the complex functions of exosomal signaling in the reprogramming and polarization of TME constituents, highlighting their dual capacity to orchestrate tumor-promoting and tumor-suppressing signals. This synthesis aims to elucidate how the modulation of TME cell behavior impacts cancer progression and contributes to the broader understanding of tumor biology.