title: Identification of two homologous antigenic peptides derived from L1 HPV-16 and 18 proteins specific for the HLA-B*3901 allele.
abstract: In this work we present evidence that the homologous peptides IHSMNSTIL and IHSMNSSIL derived from L1 HPV-16 and 18 proteins respectively, and with high specificity for the allele HLA-B*3901, according with an algorithm prediction program, induced T cell stimulation in patients with advanced cervical cancer positive for HPV-16 or 18 infection and for the HLA-B*3901 allele. Interestingly, T lymphocytes derived from a patient with HPV-18 infection and stimulated with the peptide IHSMNSTIL were capable to kill a cervical cancer cell line named Rova, derived from the tumor of the same patient. In addition, the cytotoxic activity was strongly increased when this cell line was previously treated with hrIFN-gamma. These results suggest that the CTL immune response to L1 HPV-16 and 18 protein derived epitopes is maintained in patients with advanced cervical cancer within specific alleles, and opens the possibility that homologous epitopes may be used in the generation of prophylactic vaccines for cervical tumors bearing different HPV-types.
authors.affiliation: Laboratorio de Inmunobiología (L-326), Unidad de Investigación en Diferenciación Celular y Cáncer, Facultad de Estudios Superiores Zaragoza, UNAM, Colonia Ejército de Oriente, México. albertomon@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Monroy-García
authors.forename: B
authors.initials: B
authors.lastname: Weiss-Steider
authors.forename: J
authors.initials: J
authors.lastname: Hernández-Montes
authors.forename: V F
authors.initials: VF
authors.lastname: Ortiz-Navarrete
authors.forename: A
authors.initials: A
authors.lastname: Bañuelos-Pánuco
authors.forename: A
authors.initials: A
authors.lastname: Acosta-Araujo
authors.forename: A
authors.initials: A
authors.lastname: Díaz-Quiñónez
authors.forename: C M
authors.initials: CM
authors.lastname: López-Graniel
authors.forename: G
authors.initials: G
authors.lastname: Herbert
authors.forename: J
authors.initials: J
authors.lastname: Granados
authors.forename: C
authors.initials: C
authors.lastname: de Leo
authors.forename: R M
authors.initials: RM
authors.lastname: Silva-López
authors.forename: M L
authors.initials: ML
authors.lastname: Mora-García
mesh_terms: D000483:Alleles; D000956:Antigens, Viral / Q000276:immunology*; D036022:Capsid Proteins; D003602:Cytotoxicity, Immunologic; D018984:Epitopes, T-Lymphocyte; D005260:Female; D015235:HLA-B Antigens / Q000235:genetics*; D006801:Humans; D009856:Oncogene Proteins, Viral / Q000276:immunology*; D027383:Papillomaviridae / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology; D002583:Uterine Cervical Neoplasms / Q000821:virology
chemical_list: D000956:Antigens, Viral; D036022:Capsid Proteins; D018984:Epitopes, T-Lymphocyte; D015235:HLA-B Antigens; D009856:Oncogene Proteins, Viral; C063317:L1 protein, Human papillomavirus type 16