Macrophage-based cancer immunotherapy: Challenges and opportunities

Area of Science:

• Immunology
• Oncology
• Cancer Research

Background:

• Macrophages are critical immune cells within the tumor microenvironment (TME).
• Their plasticity allows diverse functions, influencing tumor growth, metastasis, and immune responses.
• Tumor-associated macrophages (TAMs) exhibit significant heterogeneity, impacting disease progression and therapy response.

Purpose of the Study:

• To review the complex interplay between macrophages, the TME, and cancer immunotherapy.
• To discuss the phenotypic and functional heterogeneity of TAMs and their impact.
• To highlight advancements in macrophage-based immunotherapeutic strategies.

Main Methods:

• Literature review of macrophage roles in the TME.
• Analysis of TAM heterogeneity and its influence on cancer progression.
• Exploration of current and emerging macrophage-targeting immunotherapies.

Main Results:

• Macrophages exhibit dual roles in cancer, promoting growth or anti-tumor immunity.
• TAMs are highly plastic and heterogeneous, significantly affecting treatment outcomes.
• Various strategies are being developed to target macrophages for enhanced cancer immunotherapy.

Conclusions:

• Targeting macrophages in the TME is a promising strategy for cancer immunotherapy.
• Understanding macrophage plasticity and heterogeneity is crucial for effective therapeutic development.
• Exploiting macrophage functions can improve anti-tumor immunity and patient outcomes.