Skin immune system pattern recognition receptors and associated immune cells (SIS-PRRs)

The skin immune system (SIS) serves as the primary defense barrier, utilizing a diverse array of pattern recognition receptors (PRRs) to detect pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs). These receptors, including Toll-like receptors (TLRs), NOD-like receptors (NLRs), and C-type lectin receptors (CLRs), are expressed on various skin-resident cells such as keratinocytes, Langerhans cells, and dermal dendritic cells [1][2]. Upon activation, these PRRs trigger signaling cascades that lead to the production of pro-inflammatory cytokines, chemokines, and antimicrobial peptides, effectively bridging innate and adaptive immunity [3]. Dysregulation of these pathways is central to the pathogenesis of chronic inflammatory conditions like psoriasis and atopic dermatitis, as well as the response to cutaneous infections [4]. Therapeutic strategies often target specific PRRs or the downstream signaling molecules to modulate the immune response, with drugs like imiquimod acting as TLR agonists for treating skin lesions [5]. Understanding the spatial and functional distribution of these receptors and cells is crucial for developing targeted dermatological therapies [6].

Other names

Cutaneous innate immune systemSkin pattern recognition receptorsSkin-resident immune cellsCutaneous immune surveillance system

Modulation of innate immune signaling through agonism or antagonism of specific pattern recognition receptors or inhibition of downstream cytokine pathways and cellular recruitment.