Intra-amniotic Injection of Mouse Embryos

Area of Science:

• Neuroscience
• Virology
• Developmental Biology

Background:

• Recent outbreaks of infectious neurodevelopmental diseases, such as congenital Zika syndrome, highlight the need for reliable animal models.
• Existing models may not fully capture the long-term effects of prenatal viral infections on neurodevelopment.

Purpose of the Study:

• To develop and validate an intra-amniotic injection mouse model for studying Zika virus (ZIKV) infection during embryonic development.
• To assess the neurodevelopmental and behavioral outcomes in ZIKV-infected mice from birth to puberty.

Main Methods:

• Intra-amniotic injection of ZIKV into pregnant mice to infect developing embryos.
• Monitoring of ZIKV-infected mice through puberty to assess physical, neurological, and behavioral changes.
• Evaluation of specific congenital Zika syndrome symptoms, including brain volume and retinal lamination.

Main Results:

• ZIKV-infected mice exhibited key features of congenital Zika syndrome, including reduced brain volume and retinal malformations.
• Pubertal ZIKV-infected mice displayed significant visual and motor behavioral deficits.
• The model successfully allowed ZIKV-infected embryos to develop to term and reach puberty.

Conclusions:

• The intra-amniotic injection mouse model provides a valuable platform for studying the pathogenesis of congenital Zika syndrome.
• This model can be utilized for screening and evaluating potential therapeutic drug candidates.
• The model aids in understanding the long-term prognosis of infectious neurodevelopmental diseases.