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Acquisition of Maternal Antibodies both from the Placenta and by Lactation Protects Mouse Offspring from Yersinia pestis Challenge
- Publication Year :
- 2012
- Publisher :
- American Society for Microbiology, 2012.
-
Abstract
- Artificially passive immunization has been demonstrated to be effective againstYersinia pestisinfection in animals. However, maternal antibodies' protective efficacy against plague has not yet been demonstrated. Here, we evaluated the kinetics, protective efficacy, and transmission modes of maternal antibodies, using mice immunized with plague subunit vaccine SV1 (20 μg of F1 and 10 μg of rV270). The results showed that the rV270- and F1-specific antibodies could be detected in the sera of newborn mice (NM) until 10 and 14 weeks of age, respectively. There was no antibody titer difference between the parturient mice immunized with SV1 (PM-S) and the caesarean-section newborns (CSN) from the PM-S or between the lactating mice immunized by SV1 (LM-S) and the cross-fostered mice (CFM) during 3 weeks of lactation. The NM had a 72% protection against 4,800 CFUY. pestisstrain 141 challenge at 6 weeks of age, whereas at 14 weeks of age, NM all succumbed to 5,700 CFU ofY. pestischallenge. After 7 weeks of age, CFM had an 84% protection against 5,000 CFU ofY. pestischallenge. These results indicated that maternal antibodies induced by the plague subunit vaccine in mother mice can be transferred to NM by both placenta and lactation. Passive antibodies from the immunized mothers could persist for 3 months and provide early protection for NM. The degree of early protection is dependent on levels of the passively acquired antibody. The results indicate that passive immunization should be an effective countermeasure against plague during its epidemics.
- Subjects :
- Microbiology (medical)
Male
Time Factors
Yersinia pestis
Placenta
Clinical Biochemistry
Immunology
Bubonic plague
Mice
Immunity
Pregnancy
Lactation
medicine
Immunology and Allergy
Animals
Humans
Mice, Inbred BALB C
Plague
Plague Vaccine
biology
Antibody titer
medicine.disease
biology.organism_classification
Virology
Antibodies, Bacterial
Survival Analysis
Disease Models, Animal
medicine.anatomical_structure
Immunization
Animals, Newborn
biology.protein
Plague vaccine
Clinical Immunology
Female
Antibody
Immunity, Maternally-Acquired
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....39a782268134f4915ca4a3f34fd7959f