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Maternal antibodies induced by a live attenuated vaccine protect neonatal mice from cytomegalovirus. | LitMetric

AI Article Synopsis

  • Human cytomegalovirus (HCMV) can cause serious birth defects, and currently, there is no vaccine available.
  • Researchers tested live attenuated vaccine viruses created from CMV mutants lacking STAT2 antagonists in mice, which showed promising immune responses and protection against infections.
  • Female mice vaccinated before pregnancy passed protective antibodies to their offspring, highlighting the critical role of maternal antibodies in providing immunity against HCMV in congenital infections.

Article Abstract

Human cytomegalovirus (HCMV) frequently causes congenital infections, resulting in birth defects and developmental disorders. A vaccine is needed, but unavailable. We analyzed the potential of CMV mutants, lacking their STAT2 antagonists to serve as live attenuated vaccine viruses in mice. Infections with attenuated viruses elicited strong ELISA-reactive binding IgG responses and induced neutralizing antibodies as well as antibodies stimulating cellular Fcγ receptors, including the antibody-dependent cellular cytotoxicity (ADCC)-eliciting receptors FcγRIII/CD16 and FcγRIV. Accordingly, vaccinated mice were fully protected against challenge infections. Female mice vaccinated prior to gestation transmitted CMV-specific IgG to their offspring, which protected the progeny from perinatal infections in a mouse model for congenital CMV disease. To define the role of maternal antibodies, female mice either capable or incapable of producing antibodies were vaccinated and subsequently bred to males of the opposite genotype. Challenge infections of the genotypically identical F1 generation revealed the indispensability of maternal antibodies for vaccine-induced protection against cytomegaloviruses.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9898546PMC
http://dx.doi.org/10.1038/s41541-023-00602-4DOI Listing

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