Abstract
Background
The contribution of gut microbiota to human high-altitude adaptation remains inadequately understood.
Methods
Here a comparative analysis of gut microbiota was conducted between healthy individuals living at sea level and high altitude using deep whole-metagenome shotgun sequencing, to investigate the adaptive mechanisms of gut microbiota in plateau inhabitants.
Results
The results showed the gut bacteriomes in high-altitude individuals exhibited greater within-sample diversity and significant alterations in both bacterial compositional and functional profiles when compared to those of sea-level individuals, indicating the potential selection of unique bacteria associated with high-altitude environments. The strain-level investigation revealed enrichment of Collinsella aerofaciens and Akkermansia muciniphila in high-altitude populations. The characteristics of gut virome and gut mycobiome were also investigated. Compared to sea-level subjects, high-altitude subjects exhibited a greater diversity in their gut virome, with an increased number of viral operational taxonomic units (vOTUs) and unique annotated genes. Finally, correlation analyses revealed 819 significant correlations between 42 bacterial species and 375 vOTUs, while no significant correlations were observed between bacteria and fungi or between fungi and viruses.
Conclusion
The findings have significantly contributed to an enhanced comprehension of the mechanisms underlying the high-altitude geographic adaptation of the human gut microbiota.
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Data availability
The raw metagenomic sequencing dataset for this study has been deposited in the European Nucleotide Archive (ENA) at EMBL-EBI under accession number PRJEB53209 (https://www.ebi.ac.uk/ena/browser/view/PRJEB53209). The authors declare that all other data supporting the findings of the study are available in the paper and supplementary materials, or from the corresponding author upon request.
Abbreviations
- BMI:
-
Body mass index;
- HA:
-
High-altitude;
- MAGs:
-
Metagenomic-assembled genomes;
- PCoA:
-
Principal coordinates analysis;
- SL:
-
Sea level;
- vOTUs:
-
Viral operational taxonomic units
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Funding
This work was supported by Characteristic Technology of Polysaccharides Research Programme of Naqu, Tibet [grant number QYXTZX-NQ2022-03] and the National Natural Science Foundation of China [grant number 82370563, 31700697].
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Zhen Xiao: Methodology, Formal analysis, Visualization, Investigation, Writing-original draft. Yue Zhang: Methodology, Formal analysis, Visualization, Investigation, Data curation. Wei Zhang: Visualization, Investigation. Aiqin Zhang: Visualization, Investigation. Guangyang Wang: Visualization, Investigation. Changming Chen: Visualization, Investigation. Hayan Ullah: Visualization, Investigation. Taj Ayaz: Visualization, Investigation. Shenghui Li: Methodology, Data curation. Duoji Zhaxi: Visualization, Investigation. Jian Kang: Conceptualization, Methodology, Validation, Supervision, Writing-review & editing Funding acquisition. Qiulong Yan: Conceptualization, Methodology, Validation, Supervision, Writing-original draft, Funding acquisition. Xiaoguang Xu: Conceptualization, Methodology, Validation, Supervision, Funding acquisition, resources.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of People’s Hospital of Naqu (Tibet) and the First Affiliated Hospital of Dalian Medical University (Liaoning).
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Xiao, Z., Zhang, Y., Zhang, W. et al. Characterizations of gut bacteriome, mycobiome, and virome of healthy individuals living in sea-level and high-altitude areas. Int Microbiol (2024). https://doi.org/10.1007/s10123-024-00531-9
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DOI: https://doi.org/10.1007/s10123-024-00531-9