Tumor-derived factors affecting immune cells

Area of Science:

• Immunology
• Oncology
• Molecular Biology

Background:

• Tumor progression involves immunosuppressive factors from tumor and non-tumor cells within the tumor microenvironment.
• These factors, including cytokines, growth factors, and glycoproteins, establish immunosuppressive networks that drive tumor promotion, invasion, and metastasis.

Purpose of the Study:

• To discuss immunosuppressive factors and mechanisms in both mouse and human tumors.
• To explore the potential of combining drugs that inhibit these mechanisms with current immunotherapy strategies.

Main Methods:

• Review of pre-clinical tumor models demonstrating the effects of inactivating suppressive networks.
• Analysis of factors and mechanisms identified in both murine and human tumor studies.

Main Results:

• Inactivation of specific immunosuppressive networks reprograms tumor-infiltrating immune cells.
• This reprogramming enhances anti-tumor immune responses, favoring tumor suppression.

Conclusions:

• Targeting immunosuppressive networks within the tumor microenvironment is a promising strategy.
• Combining inhibitors of these networks with immunotherapy holds potential for improved cancer treatment outcomes.