title: Primary leukocyte screens for innate immune agonists.
abstract: The innate immune system of mammals is a key defense mechanism against invading foreign pathogens. Innate immune stimulants may have applications as vaccine adjuvants as well as in the treatment of cancer and some viral diseases, and clinical studies have been performed using agonists of Toll-like receptors (TLRs) 7, 8, and 9. The high-throughput screens for such agonists have typically relied on the overexpression of a single TLR gene in an immortalized cell line and are inherently artificial systems that are restricted to the identification of agonists for a single receptor. The authors describe 2 assays for the identification of immunostimulants that employ primary human leukocytes cocultured with hepatitis C virus (HCV) replicon-expressing cells. In these assays, stimulation of innate immune pathways in leukocytes induces interferon (IFN) expression, which acts to inhibit HCV replication, providing a high-throughput and low-cost readout for leukocyte activation. These assays are highly sensitive and provide a physiologically relevant system for the identification of a broad range of immunostimulant agents.
authors.affiliation: Johnson and Johnson Research Pty Ltd, Strawberry Hills NSW, Australia. amber@unswalumni.com
authors.forename: Amber
authors.initials: A
authors.lastname: Goodchild
authors.forename: Nicole
authors.initials: N
authors.lastname: Nopper
authors.forename: Alexis
authors.initials: A
authors.lastname: Craddock
authors.forename: Tamara
authors.initials: T
authors.lastname: Law
authors.forename: Andrew
authors.initials: A
authors.lastname: King
authors.forename: Gregory
authors.initials: G
authors.lastname: Fanning
authors.forename: Laurent
authors.initials: L
authors.lastname: Rivory
authors.forename: Toby
authors.initials: T
authors.lastname: Passioura
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology; D000634:Aminoquinolines / Q000494:pharmacology; D002452:Cell Count; D045744:Cell Line, Tumor; D018920:Coculture Techniques; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects / Q000276:immunology; D004353:Drug Evaluation, Preclinical / Q000379:methods*; D006801:Humans; D000077271:Imiquimod; D007113:Immunity, Innate / Q000187:drug effects* / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000166:cytology / Q000187:drug effects* / Q000276:immunology*; D009696:Nucleic Acids / Q000494:pharmacology; D051193:Toll-Like Receptors / Q000819:agonists*
chemical_list: D000276:Adjuvants, Immunologic; D000634:Aminoquinolines; D009696:Nucleic Acids; D051193:Toll-Like Receptors; D000077271:Imiquimod