Roles of exosomes in immunotherapy for solid cancers

Area of Science:

• Immunology
• Oncology
• Biotechnology

Background:

• Immunotherapy has advanced but struggles with solid tumor efficacy.
• Exosomes are key extracellular vesicles mediating intercellular communication and biological functions.
• Exosomes possess dual roles in immunity, capable of both activation and suppression.

Purpose of the Study:

• To review exosome composition and sources within the solid cancer immune microenvironment.
• To elaborate on exosome-mediated mechanisms influencing solid cancer immunotherapy.
• To summarize clinical applications of engineered exosomes and exosome vaccines in cancer immunotherapy.

Main Methods:

• Literature review of exosome functions in the tumor microenvironment.
• Analysis of exosome-carried antigens and MHC molecules for vaccine potential.
• Exploration of exosome-based drug delivery and immunotherapy strategies.

Main Results:

• Exosomes can be leveraged as anticancer vaccines due to antigen and MHC presentation.
• Exosomes from various bodily fluids are valuable biomarkers for cancer diagnosis and prognosis.
• Exosome-based therapies demonstrate significant progress in drug delivery and immunotherapy.

Conclusions:

• Exosomes play a critical role in the solid cancer immune microenvironment, impacting immunotherapy.
• Engineered exosomes and exosome vaccines present promising clinical applications for solid cancers.
• Exosomes offer potential avenues for solid cancer diagnosis, treatment, and prognosis.