Human gut microbiota adaptation to high-altitude exposure: longitudinal analysis over acute and prolonged periodsOriginal 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 tracked gut microbiota changes in 406 healthy adult males exposed to high altitude, comparing acute (7-day) and prolonged (3-month) effects.
How was it studied?
Fecal samples were collected at baseline (800 m), after 7 days at 4,500 m, and 2 weeks after returning to 800 m following 3 months at altitude. Microbiota composition was profiled using high-throughput 16S ribosomal DNA sequencing.
What did they find?
Acute high-altitude exposure caused more pronounced shifts in alpha- and beta-diversity than prolonged exposure. It increased opportunistic pathogens Ruminococcus and Oscillibacter while decreasing short-chain fatty acid producers Faecalibacterium and Bifidobacterium, and these microbiota changes persisted after returning to low altitude.
Why it matters
The findings show high-altitude hypoxia drives lasting gut microbiota remodeling and metabolic pathway changes tied to energy utilization, not just temporary disruption during acute exposure.