The vaginal microbiome and preterm birth

Area of Science:

• Microbiome research
• Reproductive health
• Genomics

Background:

• Preterm birth affects over 10% globally, with disproportionate rates among women of African ancestry in the US.
• Understanding the factors contributing to preterm birth disparities is crucial for public health.

Purpose of the Study:

• To identify microbial and host factors associated with preterm birth in a cohort of women of African ancestry.
• To leverage multi-omics data for novel preterm birth risk assessment.

Main Methods:

• Longitudinal analysis of 16S ribosomal RNA, metagenomic, metatranscriptomic, and cytokine data from 45 preterm and 90 term birth controls.
• Characterization of vaginal microbiome composition and function.
• Correlation analysis between microbial taxa and host inflammatory markers.

Main Results:

• Significant differences in vaginal microbial communities were observed between preterm and term birth groups.
• Lower levels of Lactobacillus crispatus and higher levels of specific bacteria (e.g., BVAB1, Sneathia amnii, Prevotella) were associated with preterm birth.
• Preterm-associated taxa correlated with increased proinflammatory cytokines in vaginal fluid.

Conclusions:

• Specific vaginal microbial taxa and host inflammatory profiles serve as potential biomarkers for preterm birth risk.
• These findings open new avenues for developing targeted interventions and risk assessment strategies for preterm birth.