Interfering with CCL5/CCR5 at the Tumor-Stroma Interface

Area of Science:

• Oncology
• Immunology
• Cancer Therapeutics

Background:

• Chemokines play a crucial role in regulating the tumor microenvironment.
• Macrophage polarization is a key factor in determining anti-tumor immunity.
• CCR5 (C-C chemokine receptor type 5) is implicated in cancer progression and immune cell recruitment.

Purpose of the Study:

• To investigate the therapeutic potential of CCR5 blockade in cancer.
• To determine if CCR5 blockade can alter macrophage polarization towards an anti-tumor phenotype.
• To evaluate the efficacy of CCR5 blockade in patient-derived tumor models and colorectal cancer liver metastases.

Main Methods:

• Utilized patient-derived tumor models and liver metastases from colorectal cancer patients.
• Administered CCR5 blockade as a therapeutic intervention.
• Assessed changes in macrophage polarization and functional state.

Main Results:

• Demonstrated that CCR5 blockade effectively reshapes macrophage polarization.
• Showcased a shift towards an anti-tumor functional state in macrophages.
• Confirmed these effects in both patient-derived tumor models and liver metastases.

Conclusions:

• Chemokine interference, specifically CCR5 blockade, represents a promising therapeutic strategy for cancer.
• Targeting CCR5 can reprogram the tumor microenvironment by modulating macrophage polarization.
• This approach holds potential for treating colorectal cancer, particularly in liver metastases.