Salmonella enterica serovar Typhi Ty21a expressing human papillomavirus type 16 L1 as a potential live vaccine against cervical cancer and typhoid fever.

Détails

ID Serval
serval:BIB_72CEC4E80922
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Salmonella enterica serovar Typhi Ty21a expressing human papillomavirus type 16 L1 as a potential live vaccine against cervical cancer and typhoid fever.
Périodique
Clinical and Vaccine Immunology
Auteur(s)
Fraillery D., Baud D., Pang S.Y., Schiller J., Bobst M., Zosso N., Ponci F., Nardelli-Haefliger D.
ISSN
1556-6811 (Print)
ISSN-L
1556-679X
Statut éditorial
Publié
Date de publication
2007
Volume
14
Numéro
10
Pages
1285-1295
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Human papillomavirus (HPV) vaccines based on L1 virus-like particles (VLPs) can prevent HPV-induced genital neoplasias, the precursors of cervical cancer. However, most cervical cancers occur in developing countries, where the implementation of expensive vaccines requiring multiple injections will be difficult. A live Salmonella-based vaccine could be a lower-cost alternative. We previously demonstrated that high HPV type 16 (HPV16)-neutralizing titers are induced after a single oral immunization of mice with attenuated Salmonella enterica serovar Typhimurium strains expressing a codon-optimized version of HPV16 L1 (L1S). To allow the testing of this type of vaccine in women, we constructed a new L1-expressing plasmid, kanL1S, and tested kanL1S recombinants of three Salmonella enterica serovar Typhi vaccine strains shown to be safe in humans, i.e., Ty21a, the actual licensed typhoid vaccine, and two highly immunogenic typhoid vaccine candidates, Ty800 and CVD908-htrA. In an intranasal mouse model of Salmonella serovar Typhi infection, Ty21a kanL1S was unique in inducing HPV16-neutralizing antibodies in serum and genital secretions, while anti-Salmonella responses were similar to those against the parental Ty21a vaccine. Electron microscopy examination of Ty21a kanL1S lysates showed that L1 assembled in capsomers and capsomer aggregates but not well-ordered VLPs. Comparison to the neutralizing antibody response induced by purified HPV16 L1 VLP immunizations in mice suggests that Ty21a kanL1S may be an effective prophylactic HPV vaccine. Ty21a has been widely used against typhoid fever in humans with a remarkable safety record. These finds encourage clinical testing of Ty21a kanL1S as a combined typhoid fever/cervical cancer vaccine with the potential for worldwide application.
Mots-clé
Animals, Cancer Vaccines/genetics, Cancer Vaccines/immunology, Capsid Proteins/biosynthesis, Capsid Proteins/genetics, Cells, Cultured, Female, Genetic Vectors, Human papillomavirus 16/immunology, Humans, Mice, Mice, Inbred BALB C, Oncogene Proteins, Viral/biosynthesis, Oncogene Proteins, Viral/genetics, Papillomavirus Vaccines/administration & dosage, Papillomavirus Vaccines/genetics, Plasmids/genetics, Plasmids/immunology, Polysaccharides, Bacterial/administration & dosage, Polysaccharides, Bacterial/genetics, Salmonella typhi/genetics, Salmonella typhi/immunology, Typhoid Fever/immunology, Typhoid Fever/prevention & control, Typhoid-Paratyphoid Vaccines/administration & dosage, Typhoid-Paratyphoid Vaccines/genetics, Uterine Cervical Neoplasms/immunology, Uterine Cervical Neoplasms/prevention & control, Vaccines, Attenuated/administration & dosage, Vaccines, Attenuated/genetics, Vaccines, Combined/administration & dosage, Vaccines, Combined/genetics, Vaccines, Synthetic/administration & dosage, Vaccines, Synthetic/genetics
Pubmed
Web of science
Open Access
Oui
Création de la notice
25/01/2008 14:35
Dernière modification de la notice
20/08/2019 14:30
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