Modeling Ascending Vaginal Infection, Preterm Birth, and Neonatal Morbidity in Mice.

Area of Science:

• Reproductive biology and neonatal health
• Infectious disease modeling
• Animal models for preterm birth research

Background:

• Preterm birth is a leading global cause of neonatal death.
• Existing mouse models fail to replicate key human neonatal morbidities like neuropathology and lung injury.
• There is a critical need for better animal models to test preterm birth interventions.

Purpose of the Study:

• To characterize a novel mouse model of preterm birth.
• To create a model that mimics human neonatal neuropathological and lung injury outcomes.
• To utilize a live bacterial ascending infection to induce preterm birth.

Main Methods:

• Intravaginal administration of a bioluminescent strain of Escherichia coli in mice.
• Assessment of neuropathological outcomes using immunohistochemistry.
• Evaluation of lung injury through histological techniques.

Main Results:

• The developed model successfully induces preterm birth via ascending vaginal bacterial infection.
• Neonatal neuropathological changes characteristic of human preterm birth sequelae were observed.
• Lung injury consistent with preterm birth complications was identified in the model.

Conclusions:

• This mouse model is the first to replicate human-like neonatal neuropathology and lung injury following preterm birth.
• The model provides a valuable platform for studying the mechanisms of preterm birth-related morbidities.
• It facilitates the translation of innovative preventative and therapeutic strategies for preterm birth.