Cervical Microbiota Associated with Higher Grade Cervical Intraepithelial Neoplasia in Women Infected with High-Risk Human PapillomavirusesOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers examined whether cervical microbiota composition is associated with high-grade cervical intraepithelial neoplasia (CIN 2+) in women infected with high-risk HPV. They also tested whether the microbiota relate to oxidative DNA damage in cervical cells.
How was it studied?
The study compared 340 women with CIN 2+ against 90 women with CIN 1. Cervical mucus samples underwent Illumina sequencing of the 16S rRNA gene to characterize microbiota composition.
What did they find?
Overall microbial diversity was not linked to CIN severity or oxidative DNA damage. A community type dominated by Lactobacillus iners and unclassified Lactobacillus species was associated with CIN 2+ (OR 3.48, 95% CI 1.27 to 9.55). Lactobacillaceae, Lactobacillus, L. reuteri, and several Lactobacillus subtypes were independently associated with CIN 2+ (effect size above 2.0, P < 0.05).
Why it matters
The findings suggest specific Lactobacillus-dominated cervical communities, not overall diversity, may relate to higher-grade cervical dysplasia in HPV-infected women. The authors note the associations need confirmation with whole-genome shotgun sequencing, and found little evidence oxidative DNA damage mediates this relationship.