Innate Immunity

Innate immunity provides an early response to biological signals associated with infection or cellular stress. It involves physical barriers, complement proteins, inflammatory mediators, and specialized immune cells, including macrophages, dendritic cells, and natural killer cells.

Pattern recognition receptors, such as Toll-like receptors and selected cytosolic nucleic acid sensors, detect molecular features that may indicate the presence of foreign genetic material or infection.

Depending on the delivery system and its intracellular location, these sensing pathways may contribute to the production of type I interferons, inflammatory cytokines, and other mediators. Such responses can influence cellular activity, antigen presentation, and the subsequent development of adaptive immunity.

Innate immune activation is not necessarily equivalent to therapeutic failure. Its consequences depend on the strength, duration, location, and biological context of the response.