Host antimicrobial peptide response

The host antimicrobial peptide response is a critical component of the innate immune system, involving the production and release of small, cationic peptides such as defensins and cathelicidins (PMID: 23116313). These peptides exhibit broad-spectrum activity against bacteria, fungi, and viruses by disrupting microbial membranes or interfering with intracellular processes (PMID: 16291601). Beyond direct killing, the AMP response plays a significant role in immunomodulation, including chemotaxis, wound healing, and the regulation of inflammatory cytokines (PMID: 23116313). In clinical contexts, deficiencies in this response are linked to increased susceptibility to infections and chronic inflammatory skin conditions like atopic dermatitis, whereas over-activation is seen in psoriasis (PMID: 16291601). Therapeutic strategies often focus on host-directed therapies that induce the expression of endogenous AMPs, such as Vitamin D analogs or histone deacetylase inhibitors, to enhance the natural defense mechanisms of the host (PMID: 15585605). This approach is particularly relevant for addressing antimicrobial resistance by boosting the host's own innate defenses rather than targeting the pathogen directly.

Other names

Host defense peptide responseInnate antimicrobial responseEndogenous antimicrobial peptide induction

Induction of endogenous antimicrobial peptide expression through activation of signaling pathways such as the Vitamin D receptor (VDR) pathway or Toll-like receptor (TLR) signaling.