Abstract
This study was conducted for the metagenomic analysis of stool samples from CRC affected individuals to identify biomarkers for CRC in Hainan, the only tropical island province of China. The gut microbiota of CRC patients differed significantly from that of healthy and reference database cohorts based on Aitchison distance and Bray–Cutis distance but there was no significant difference in alpha diversity. Furthermore, at the species level, 68 species were significantly altered including 37 CRC-enriched, such as, Fusobacterium nucleatum, Parvimonas micra, Gemella morbillorum, Citrobacter portucalensis, Alloprevotella sp., Shigella sonnei, Coriobacteriaceae bacterium, etc. Sixty-seven different metabolic pathways were acquired, and pathways involved in the synthesis of many amino acids were significantly declined. Besides, 2 identified antibiotic resistance genes performed well (area under the receive-operation curve AUC = 0.833, 95% CI 58.51–100%) compared with virulence factor genes. The results of the present study provide region-specific bacterial and functional biomarkers of gut microbiota for CRC patients in Hainan. Microbiota is considered as a non-invasive biomarker for the detection of CRC. Gut microbiota of different geographic regions should be further studied to expand the understanding of markers, especially for the China cohort due to diverse nationalities and lifestyles.
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Data Availability
The sequence data reported in this paper have been deposited in the NCBI database (metagenomic sequencing data: PRJNA608088, https://www.ncbi.nlm.nih.gov/search/all/?term=PRJNA608088). The analyses by R program can be found under: https://github.com/HNUmcc/CRC-cohort-Hainan-China. Further information and requests for resources and code should be directed to and will be fulfilled by the corresponding author (Jiachao Zhang, zhjch322123@163.com).
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Acknowledgements
We sincerely thank all the volunteers for their participation.
Funding
This work was supported by Key R & D programs in Hainan (Grant No. ZDYF2019150), the Scientific Research Foundation of Hainan University (Grant No. KYQD1548).
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The study was designed by JZ and KNC. The experiment was performed by CM, KC. Data collection was performed by HC, YT, YW and QO. Data analysis was performed by CM, RM and KC. The manuscript was written by CM, RM, KC, SW, JZ and KNC. All authors read and approved the final manuscript.
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The protocol for the study was approved by the Ethics Committee Hainan University.
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All the participants in the study were informed about the study and were provided with written consent. Sampling and all described subsequent steps were conducted in accordance with the approved guidelines.
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AUC based on the markers of VFGs classified HN_CRC and Con group
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Chang, H., Mishra, R., Cen, C. et al. Metagenomic Analyses Expand Bacterial and Functional Profiling Biomarkers for Colorectal Cancer in a Hainan Cohort, China. Curr Microbiol 78, 705–712 (2021). https://doi.org/10.1007/s00284-020-02299-3
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DOI: https://doi.org/10.1007/s00284-020-02299-3