Protection against systemic fatal pneumococcal infection by maternal intranasal immunization with pneumococcal surface protein A (PspA)
| Autor: | Toshiki Katsurahara, Kazuma Yamauchi, Dewan S. Billal, Muneki Hotomi, Noboru Yamanaka |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Microbiology (medical)
Serotype Male Offspring medicine.disease_cause Immunoglobulin G Pneumococcal Infections Microbiology Pneumococcal Vaccines Mice Bacterial Proteins Pregnancy Streptococcus pneumoniae medicine Animals Humans Pharmacology (medical) Administration Intranasal Mice Inbred BALB C biology business.industry medicine.disease Antibodies Bacterial Survival Rate Pneumococcal infections Infectious Diseases Immunization Animals Newborn Immunology biology.protein Female Antibody business |
| Zdroj: | Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy. 14(6) |
| ISSN: | 1341-321X |
| Popis: | Streptococcus pneumoniae is a leading causative pathogen responsible for various types of bacterial infectious diseases in children. The aim of this study was to evaluate the protection conferred against fatal pneumococcal infections during infancy by maternal intranasal immunization with pneumococcal surface protein A (PspA). Four-week-old female BALB/c mice were immunized with PspA mixed with, or without, cholera toxin B (CTB) intranasally twice a week for 3 weeks. After the final immunization, they were mated with male mice to obtain offspring. Offspring at 10 days old were intraperitoneally inoculated with a pneumococcus strain, TIGR4, serotype 4. After the infections their survival periods were monitored. Anti-PspA-specific IgG antibody was induced in sera and breast milk at birth and maintained for 14 days during nursing periods in the PspA-immunized mother mice. At birth, offspring delivered from PspA-immunized mother mice had levels of anti-PspA-specific IgG antibody in sera same to those in their mothers on the day of birth. The survival times to death of offspring delivered from PspA-immunized mother mice after systemic fatal pneumococcal infections were significantly extended compared to those of controls. These findings suggest that maternal intranasal immunization with PspA could be an attractive procedure to employ against pneumococcal infections in early childhood. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect