title: Peptide antimicrobial agents.
abstract: Antimicrobial host defense peptides are produced by all complex organisms as well as some microbes and have diverse and complex antimicrobial activities. Collectively these peptides demonstrate a broad range of antiviral and antibacterial activities and modes of action, and it is important to distinguish between direct microbicidal and indirect activities against such pathogens. The structural requirements of peptides for antiviral and antibacterial activities are evaluated in light of the diverse set of primary and secondary structures described for host defense peptides. Peptides with antifungal and antiparasitic activities are discussed in less detail, although the broad-spectrum activities of such peptides indicate that they are important host defense molecules. Knowledge regarding the relationship between peptide structure and function as well as their mechanism of action is being applied in the design of antimicrobial peptide variants as potential novel therapeutic agents.
authors.affiliation: Centre for Microbial Diseases and Immunity Research, University of British Columbia, Lower Mall Research Station, 232-2259 Lower Mall, Vancouver, British Columbia V6T 1Z4, Canada.
authors.forename: Håvard
authors.initials: H
authors.lastname: Jenssen
authors.forename: Pamela
authors.initials: P
authors.lastname: Hamill
authors.forename: Robert E W
authors.initials: RE
authors.lastname: Hancock
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D000935:Antifungal Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D023181:Antimicrobial Cationic Peptides / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D000977:Antiparasitic Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D000998:Antiviral Agents / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D002417:Cattle; D023082:Defensins; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011817:Rabbits
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D023181:Antimicrobial Cationic Peptides; D000977:Antiparasitic Agents; D000998:Antiviral Agents; D023082:Defensins