Immunomodulation via T regulatory cell and macrophage activity

"Immunomodulation via T regulatory cell and macrophage activity" refers not to a discrete molecular target but rather an **intercellular pathway** involving the coordinated actions of **regulatory T cells (Tregs)** and **macrophages** in controlling immune responses. Regulatory T cells are specialized CD4+ lymphocytes expressing the transcription factor FoxP3; they suppress excessive immune activation through mechanisms including secretion of anti-inflammatory cytokines like IL‑10 and transforming growth factor beta (TGF‑β), cytolysis via granzyme B/perforin pathways, metabolic disruption through adenosine production, modulation of antigen-presenting cell function by CTLA‑4 engagement, and competition for interleukin 2[1][3][7]. Macrophages can adopt pro-inflammatory ("M1") or anti-inflammatory ("M2") phenotypes. M2-like macrophages support tissue repair and limit inflammation partly by promoting expansion/proliferation of regulatory T cells—this is mediated in part by secreted factors such as RELMα[2][6]. Macrophages also induce tolerance through reactive oxygen species production which favors induction/maintenance of functional regulatory populations[4]. The interplay between these two cell types is crucial for maintaining self-tolerance, preventing autoimmune disease, limiting chronic inflammation, but can also contribute to tumor immune evasion when dysregulated. This axis is not itself a druggable "target," but rather represents a complex network that can be modulated indirectly by therapies aimed at either component. Because this entry describes an immunological process/pathway—not a canonical molecule/receptor—it should not be considered a standard therapeutic target per se. For structured data purposes it should be flagged as incorrect/incomplete if used where only discrete molecular targets are appropriate. References supporting these statements include mechanistic reviews on both individual roles for each cell type in immunoregulation as well as their cooperative functions in health/disease contexts[1][2][3][4][5][6].

Other names

Treg/macrophage immunomodulationRegulatory T cell and macrophage crosstalkTreg-macrophage axis