Abstract
The complex interplay between tumors and their microenvironment presents challenges in cancer therapy, sparking interest in novel immunotherapeutic strategies. Current therapeutic approaches lack consistency and pose significant risks to patients. Tumor-associated macrophages (TAMs) play a pivotal role in tumor progression or inhibition, depending on their polarization state. This comprehensive analysis explores the potential of selectively repolarizing TAMs towards an anti-tumor phenotype as an effective therapeutic strategy. Nanoparticle-based delivery systems, such as polymeric, lipid-based, and inorganic nanoparticles, offer promising TAM targeting and repolarization avenues. These strategies demonstrate the ability to shift TAMs from a pro-tumoral M2 phenotype to an anti-tumoral M1 phenotype, resulting in significant anti-tumor effects. These processes have been both in vivo and in vitro, depending on the progress of the process. Nanoparticles, for example, have primarily been in vitro, but some have reached the in vivo stage. Despite the complexity of tumor immunology, the repolarization of TAMs emerges as a promising and versatile immunotherapeutic approach with reduced adverse effects compared to traditional treatments. This study underscores the importance of continued research and development in TAM repolarization, paving the way for future advancements and improved cancer therapies.
Published Version
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