ADSL and infection: Antimicrobial peptides (AMPs) form part of the body's innate immune response, serve as potent antibacterial substances that control pathogenic infections and activate the innate and adaptive immune system.60 Cathelicidin (human cationic antimicrobial protein 18, hCAP18) is a prominent AMP in human epithelial cells, which serves to augment host defense, and appears to play a role in tissue repair and wound closure.61, 62, 63, 64 In response to cutaneous infections, hCAP18 is upregulated in skin and shows direct antimicrobial, antiviral and antifungal activity.64