[Tumor-associated Macrophage: 
Emerging Targets for Modulating the Tumor Microenvironment]

Area of Science:

• Oncology
• Immunology
• Cancer Biology

Background:

• Tumor-associated macrophages (TAM) are key regulators of the lung cancer immune microenvironment.
• TAM influence tumor initiation, progression, invasion, and metastasis through phenotypic and functional changes.
• Macrophages polarize into M1 (anti-tumor) and M2 (pro-tumor) subtypes; TAM typically adopt the M2 phenotype, suppressing anti-tumor immunity.

Approach:

• This review examines the role of anti-angiogenic drugs in modulating TAM phenotypes.
• Focuses on the potential of these drugs to reprogram M2 TAM towards an M1 phenotype.
• Discusses the implications of TAM functional alterations in anti-angiogenic and immunotherapy.

Key Points:

• TAM polarization into the M2 phenotype promotes immune suppression and tumor growth in lung cancer.
• Anti-angiogenic therapies can potentially reverse M2 TAM polarization to an anti-tumor M1 state.
• TAM function is critical for the efficacy of both anti-angiogenic therapy and immunotherapy.

Conclusions:

• Modulating TAM polarization and function presents novel therapeutic targets for lung cancer.
• Reprogramming TAM offers a promising strategy for enhancing anti-tumor immunity and treatment outcomes.
• Targeting TAM may overcome resistance and improve the effectiveness of current lung cancer therapies.