Immunomodulation of innate and adaptive immune responses

Immunomodulation of innate and adaptive immune responses refers to the regulation of both the immediate, non-specific (innate) and the delayed, specific (adaptive) arms of the immune system. Innate immunity relies on pattern recognition receptors (PRRs) such as Toll-like receptors, RIG-I-like receptors, Nod-like receptors, and C-type lectin receptors that detect pathogens or cellular damage and initiate signaling cascades involving cytokines (e.g., type I interferons, interleukins), thereby stimulating or shaping subsequent adaptive immune responses such as T cell and B cell activation[1][2][3][4][5][7]. Adaptive immunity is characterized by antigen-specific recognition and immune memory, orchestrated by lymphocytes, chiefly T cells and B cells[7]. Multiple molecular mechanisms and cell types are involved in the cross-talk between these systems, including antigen-presenting cells, cytokines, immune checkpoint proteins, and regulatory T cells, highlighting the integrated, complex nature of immune regulation and the importance of specific molecular targets within this broader process[1][2][3][4][5][6][7].