Extracellular vesicles in the tumor immune microenvironment.

Area of Science:

• Immunology
• Cell Biology
• Oncology

Background:

• Extracellular vesicles (EVs) are key mediators of intercellular communication, carrying bioactive molecules like proteins, lipids, and nucleic acids.
• EVs secreted by various cell types can alter recipient cell function, playing roles in both physiological and pathological processes.
• Recent research highlights the critical involvement of EVs in shaping the tumor immune microenvironment (TIME).

Purpose of the Study:

• To summarize current understanding of extracellular vesicles (EVs) and their role in remodeling the tumor immune microenvironment (TIME).
• To elucidate the mechanisms by which EVs modulate tumor-specific immunity.
• To discuss the mutual regulation between tumor cells and immune cells via EVs within the TIME.

Main Methods:

• This review synthesizes existing literature on EVs and their interactions within the tumor immune microenvironment.
• Focuses on the bidirectional communication mediated by EVs between tumor cells and tumor-infiltrating immune cells.
• Analysis of current research limitations and future research directions.

Main Results:

• EVs derived from tumor and immune cells are crucial for communication within the TIME.
• EVs influence tumor fate and the effectiveness of antitumor therapies.
• Mutual regulation between tumor and immune cells through EVs significantly impacts the TIME.

Conclusions:

• Extracellular vesicles are pivotal in modulating the tumor immune microenvironment and influencing antitumor immunity.
• Understanding EV-mediated communication is essential for advancing cancer immunotherapy.
• Further research is needed to overcome current study limitations and fully harness EVs for therapeutic strategies.