Adjuvant-mediated immune system stimulation (null)

Adjuvant-mediated immune system stimulation refers to the process by which adjuvants, substances included in vaccines and certain immunotherapies, enhance the body's immune response to an antigen. Adjuvants achieve this by activating innate immune receptors (such as TLRs and NLRs) on antigen-presenting cells, increasing antigen uptake and presentation, upregulating co-stimulatory molecules and cytokine release, and promoting polarization toward either antibody or cellular immune responses. This enhanced priming leads to stronger and longer-lasting adaptive immunity, improved protection against infection, and is increasingly essential in modern vaccines utilizing weakly immunogenic antigens, as well as for cancer immunotherapy. Adjuvant stimulation is a process, not a discrete molecular target, and involves a spectrum of molecular pathways and cellular actors, with both established and emerging adjuvants varying in efficacy and safety

Other names

Immune enhancement by adjuvantsAdjuvant-induced immunostimulationVaccine adjuvant effect

Activation of PRRs on APCs (TLRs, NLRs); Enhancement of antigen uptake and presentation on MHC proteins; Upregulation of co-stimulatory molecules (CD40, CD80, CD86); Induction of inflammatory cytokines (IL-6, IL-12, TNF-α); Inflammasome activation via cellular damage (NLRP3 inflammasome); Promotion of Th1, Th2, Th17 polarization depending on adjuvant type