CCR5 as a Cross-Disease Signaling Axis: A Systems-Level Perspective Across Immunology, Oncology, and Neurobiology

CCR5, a chemokine receptor best known for its role in human immunodeficiency virus (HIV) infection and immune cell trafficking, is increasingly recognized as a regulator of cellular communication across multiple biological systems. While traditionally studied within distinct disease domains, emerging evidence indicates that CCR5-mediated signaling contributes to the organization of tissue microenvironments by coordinating cell migration, activation, and intercellular interaction. In immunology, CCR5 directs leukocyte trafficking and modulates inflammatory responses. In oncology, it shapes tumor microenvironments by influencing immune cell recruitment, tumor cell behavior, and metastatic processes. In neurobiology, CCR5 participates in neuroinflammatory signaling and mediates interactions between neural and malignant cells, including the maintenance of glioma stem cell populations. These observations suggest that CCR5 functions as a context-dependent signaling axis operating across diverse biological systems. This perspective integrates findings from immunology, oncology, and neurobiology to propose a unifying framework in which CCR5 regulates cell positioning, communication, and survival within complex tissue environments. By reframing CCR5 as part of a shared signaling infrastructure rather than a disease-specific mechanism, this work highlights opportunities for cross-disciplinary insight and systems-level therapeutic strategies. Understanding CCR5 in this context may inform the development of interventions that target communication networks underlying disease processes, rather than isolated cellular components, with potential implications across multiple domains of translational medicine.