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Immunotherapy and Immune Responses · Journal article
Immunology Research and Perspectives · September 11, 2026
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This is a narrative review that synthesizes current understanding of molecular and cellular mechanisms regulating NK cell and dendritic cell interactions in immune homeostasis. It proposes an integrated framework linking these interactions to cytokine signaling, receptor regulation, and tissue context across cancer, infection, and autoimmune disease, and discusses emerging therapeutic approaches. The source presents conceptual synthesis and mechanistic interpretation rather than new experimental evidence or clinical data.
Journal article.
NK-DC axis functions as a central regulatory framework for innate immune homeostasis through reciprocal cellular interactions NK-DC communication involves receptor–ligand interactions, reciprocal cytokine signaling, and NK-mediated editing of DCs Regulatory T cells function as downstream regulatory partners reinforcing peripheral tolerance rather than as central components of the NK-DC axis
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This review provides a conceptual framework for understanding innate immune regulation but does not present empirical evidence or clinical trial data to guide therapeutic decisions. Clinicians should treat the proposed NK-DC axis model as a mechanism-based hypothesis requiring experimental validation rather than established clinical practice.
This is a narrative review synthesizing mechanistic and molecular knowledge about NK-DC interactions without presenting new experimental data, clinical trials, or empirical findings to evaluate.
This review provides a conceptual framework for understanding innate immune regulation but does not present empirical evidence or clinical trial data to guide therapeutic decisions. Clinicians should treat the proposed NK-DC axis model as a mechanism-based hypothesis requiring experimental validation rather than established clinical practice.
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What is missing. This record has no reported figures. That is a gap in the analysis, not a judgement about the study.
Innate immune homeostasis depends on the coordinated regulation of protective responses and tolerance across tissues. Although natural killer (NK) cells and dendritic cells (DCs) are traditionally viewed as cytotoxic effectors and antigen-presenting cells, respectively, accumulating evidence indicates that their reciprocal interactions actively determine the magnitude, duration, and functional direction of immune responses. This review examines the NK-DC axis as a central regulatory framework for innate immune homeostasis, integrating cellular interactions with cytokine signaling, receptor-mediated regulation, antigen presentation, and tissue-specific microenvironmental cues. We first examine NK cell development, subset specialization, activating and inhibitory receptor signaling, and effector functions, followed by analysis of DC heterogeneity, antigen processing, cross-presentation, and immunogenic versus tolerogenic programs. We then synthesize the molecular mechanisms underlying NK-DC communication, including receptor–ligand interactions, reciprocal cytokine signaling, and NK-mediated editing of DCs. Attention is given to the integration of regulatory T cells (Tregs) into this framework, in which Tregs act as downstream regulatory partners that reinforce peripheral tolerance rather than as equivalent components of the central NK-DC axis. The review further examines how checkpoint signaling, metabolic stress, hypoxia, and other features of the tissue microenvironment reshape NK-DC communication in cancer, chronic infection, and autoimmune disease. These mechanisms are considered alongside emerging therapeutic approaches, including cytokine-induced memory-like NK cells, CAR-NK therapy, immune checkpoint blockade, dendritic-cell vaccines, and tolerogenic DC-based interventions. By integrating molecular mechanisms, tissue context, disease-associated dysregulation, and therapeutic strategies, this review proposes an integrated framework for understanding how NK-DC interactions establish, maintain, and potentially restore immune homeostasis.
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