Diversity analysis of oral and gut microbiota in osteoporotic ratsOriginal 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 compared oral and gut microbiota in ovariectomized (OVX) rats, a model of postmenopausal osteoporosis, against sham-operated controls. The goal was to characterize how bone loss relates to shifts in oral and gut bacterial communities.
How was it studied?
Sixteen 8-week-old female Sprague-Dawley rats underwent OVX or sham surgery, with oral swabs and fecal samples collected 12 weeks later. Microbiota were profiled by 16S rRNA gene sequencing and compared against femur bone mineral density (BMD) measured by micro-CT.
What did they find?
OVX rats had significantly higher oral and gut microbial diversity than sham rats, and bacterial taxa counts were inversely linked to BMD. Firmicutes proportions fell in both sites in OVX rats, oral Bacteroidota rose, and Lactobacillus dropped sharply in both oral and gut microflora.
Why it matters
The findings suggest oral and gut microbiota shift together as bone density declines, pointing to an oral-gut-bone axis in osteoporosis. Lactobacillus loss and Bacteroidota gain may serve as candidate biomarkers linking microbial dysbiosis to bone health.