review · Medicine
Neutrophils, historically viewed primarily as first-line defenders against infection, play a nuanced, dual role within the breast cancer microenvironment. Rather than serving solely as phagocytic and pro-inflammatory agents, these innate immune cells can either restrain or advance tumour growth depending on the specific physiological context. On one hand, neutrophils can exert antitumour effects via cytotoxicity and immune surveillance. Conversely, they can foster tumour progression by establishing an immunosuppressive environment, stimulating angiogenesis, and aiding metastatic spread. Examining the signalling pathways, cellular interactions, and recruitment mechanisms that guide neutrophil activity illuminates how these cells influence malignancy. Resolving the uncertainties and gaps surrounding their function is key to clarifying the broader immune landscape of breast cancer, which could eventually inform the design of targeted therapeutic strategies and enhanced clinical management approaches.
Breast cancer remains a major global health challenge with complex progression mechanisms. Understanding the dual nature of neutrophils reveals how the immune system can both fight and inadvertently support tumours. Clarifying these biological pathways is a vital step toward creating more nuanced cancer treatments that leverage protective immune responses while blocking mechanisms that enable disease spread.
This conceptual review is at the early-stage basic research level and does not present tested clinical tools or therapeutics. However, deciphering neutrophil signalling pathways and recruitment mechanisms could provide pharmaceutical and biotechnology researchers with targets for future drug discovery programmes. Such insights may eventually enable therapeutic developers to design immunotherapies that inhibit tumour-promoting neutrophil behaviours or enhance their cytotoxic capabilities within breast cancer management.
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Breast cancer remains a pressing global health concern, with a myriad of intricate factors contributing to its development, progression, and heterogeneity. Among these multifaceted elements, the role of immune cells within the tumor microenvironment is gaining increasing attention. In this context, neutrophils, traditionally regarded as the first responders to infections, are emerging as noteworthy participants in the complex landscape of breast cancer. This paper seeks to unravel the intricate and multifaceted role of neutrophils in breast cancer. Neutrophils, classically known for their phagocytic and pro-inflammatory functions, are now recognized for their involvement in promoting or restraining tumor growth. While their presence within the tumor microenvironment may exert antitumor effects through immune surveillance and cytotoxic activities, these innate immune cells can also facilitate tumor progression by fostering an immunosuppressive milieu, promoting angiogenesis, and aiding metastatic dissemination. The intricacies of neutrophil-tumor cell interactions, signaling pathways, and mechanisms governing their recruitment to the tumor site are explored in detail. Challenges and gaps in current knowledge are acknowledged, and future directions for research are outlined. This review underscores the dynamic and context-dependent role of neutrophils in breast cancer and emphasizes the significance of unraveling their multifaceted contributions. As we delve into the complexities of the immune landscape in breast cancer, a deeper understanding of the warriors within, the neutrophils, presents exciting prospects for the development of novel therapeutic strategies and a more comprehensive approach to breast cancer management.
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DOI: 10.1097/md.0000000000037654
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