title: Synthetic peptides entrapped in microparticles can elicit cytotoxic T cell activity.
abstract: Peptides from Plasmodium berghei circumsporozoite protein (CS) and influenza A virus nucleoprotein (NP) were entrapped in microparticles prepared from poly (lactide-co-glycolide) polymers, and the microparticles were administered parenterally to mice. After immunization with single or multiple doses, splenocytes were tested for a cytotoxic T cell (CTL) response and high levels of CTL activity were detected. The CTL induced were CD8+, MHC class I restricted, and could recognize virus infected cells. Peptide entrapped in microparticles of mean size < 500 nm were better inducers of CTL than larger microparticles (mean > 2 microns and above). Microparticles could also be used to deliver lipid modified peptides (lipopeptides) and elicited higher levels of cytolytic activity than either free peptide in microparticles or lipopeptide alone. Microparticles provide a novel way of inducing a CTL response using synthetic peptides.
authors.affiliation: United Biomedical Inc., Hauppauge, NY 11788, USA.
authors.forename: D F
authors.initials: DF
authors.lastname: Nixon
authors.forename: C
authors.initials: C
authors.lastname: Hioe
authors.forename: P D
authors.initials: PD
authors.lastname: Chen
authors.forename: Z
authors.initials: Z
authors.lastname: Bian
authors.forename: P
authors.initials: P
authors.lastname: Kuebler
authors.forename: M L
authors.initials: ML
authors.lastname: Li
authors.forename: H
authors.initials: H
authors.lastname: Qiu
authors.forename: X M
authors.initials: XM
authors.lastname: Li
authors.forename: M
authors.initials: M
authors.lastname: Singh
authors.forename: J
authors.initials: J
authors.lastname: Richardson
authors.forename: P
authors.initials: P
authors.lastname: McGee
authors.forename: T
authors.initials: T
authors.lastname: Zamb
authors.forename: W
authors.initials: W
authors.lastname: Koff
authors.forename: C Y
authors.initials: CY
authors.lastname: Wang
authors.forename: D
authors.initials: D
authors.lastname: O'Hagan
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology; D000818:Animals; D000953:Antigens, Protozoan / Q000096:biosynthesis / Q000276:immunology*; D000956:Antigens, Viral / Q000096:biosynthesis / Q000276:immunology*; D004655:Emulsions; D005260:Female; D009980:Influenza A virus / Q000276:immunology; D019344:Lactic Acid; D008074:Lipoproteins / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D008863:Microspheres; D010455:Peptides / Q000138:chemical synthesis* / Q000276:immunology*; D010962:Plasmodium berghei / Q000276:immunology; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000627:therapeutic use; D013025:Glycine max / Q000276:immunology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D000276:Adjuvants, Immunologic; D000953:Antigens, Protozoan; D000956:Antigens, Viral; D004655:Emulsions; D008074:Lipoproteins; D010455:Peptides; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C061893:N-palmitoyl-5,6-dipalmitoyl-S-glycerylcysteinyl-seryl-serine