title: Therapeutic effect of a T helper cell supported CTL response induced by a survivin peptide vaccine against murine cerebral glioma.
abstract: Survivin is a tumor-associated antigen (TAA) that has significant potential for use as a cancer vaccine target. To identify survivin epitopes that might serve as targets for CTL-mediated, anti-tumor responses, we evaluated a series of survivin peptides with predicted binding to mouse H2-K(b) and human HLA-A*0201 antigens in peptide-loaded dendritic cell (DC) vaccines. H2-K(b)-positive, C57BL/6 mice were vaccinated using syngeneic, peptide-loaded DC2.4 cells. Splenocytes from vaccinated mice were screened by flow cytometry for binding of dimeric H2-K(b):Ig to peptide-specific CD8+ T cells. Two survivin peptides (SVN(57-64) and SVN(82-89)) generated specific CD8+ T cells. We chose to focus on the SVN(57-64) peptide because that region of the molecule is 100% homologous to human survivin. A larger peptide (SVN(53-67)), containing multiple class I epitopes, and a potential class II ligand, was able to elicit both CD8+ CTL and CD4+ T cell help. We tested the SVN(53-67) 15-mer peptide in a therapeutic model using a peptide-loaded DC vaccine in C57BL/6 mice with survivin-expressing GL261 cerebral gliomas. This vaccine produced significant CTL responses and helper T cell-associated cytokine production, resulting in a significant prolongation of survival. The SVN(53-67) vaccine was significantly more effective than the SVN(57-64) core epitope as a cancer vaccine, emphasizing the potential benefit of incorporating multiple class I epitopes and associated cytokine support within a single peptide.
authors.affiliation: Department of Neurosurgery, Roswell Park Cancer Institute, Elm and Carlton Streets, Buffalo, NY, 14263, USA. michael.ciesielski@roswellpark.org
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Ciesielski
authors.forename: Danuta
authors.initials: D
authors.lastname: Kozbor
authors.forename: Carla A
authors.initials: CA
authors.lastname: Castanaro
authors.forename: Tara A
authors.initials: TA
authors.lastname: Barone
authors.forename: Robert A
authors.initials: RA
authors.lastname: Fenstermaker
mesh_terms: D000818:Animals; D001932:Brain Neoplasms / Q000276:immunology / Q000628:therapy*; D019496:Cancer Vaccines / Q000276:immunology / Q000627:therapeutic use*; D003713:Dendritic Cells / Q000276:immunology / Q000637:transplantation; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D005434:Flow Cytometry; D005910:Glioma / Q000276:immunology / Q000628:therapy*; D006649:Histocompatibility Antigens / Q000235:genetics / Q000276:immunology; D051034:Inhibitor of Apoptosis Proteins; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008869:Microtubule-Associated Proteins / Q000276:immunology*; D009363:Neoplasm Proteins / Q000276:immunology*; D000077022:Survivin; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D022223:Vaccines, Subunit / Q000276:immunology / Q000627:therapeutic use
chemical_list: C107489:BIRC5 protein, human; D019496:Cancer Vaccines; D018984:Epitopes, T-Lymphocyte; D006649:Histocompatibility Antigens; D051034:Inhibitor of Apoptosis Proteins; D008869:Microtubule-Associated Proteins; D009363:Neoplasm Proteins; D000077022:Survivin; D022223:Vaccines, Subunit