PreprintCited by 1Gut microbiota and healthMicrobial Community Ecology and PhysiologyGenomics and Phylogenetic Studies

Diversity and composition of gut microbiome of cervical cancer patients by 16S rRNA and whole-metagenome sequencing

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Biegert, Greyson, Karpinets, Tatiana, Wu, Xiaogang, Alam, Molly B. El, Sims, Travis T., Yoshida-Court, Kyoko, Lynn, Erica J., Yue, Jingyan +8 more·2020·bioRxiv (Cold Spring Harbor Laboratory)

Abstract

Purpose: Next generation sequencing has progressed rapidly, characterizing microbial communities beyond culture-based or biochemical techniques. 16S ribosomal RNA gene sequencing (16S) produces reliable taxonomic classifications and relative abundances, while shotgun metagenome sequencing (WMS) allows higher taxonomic and functional resolution at greater cost. The purpose of this study was to determine if 16S and WMS provide congruent information for our patient population from paired fecal microbiome samples. Methods: Patients with locally advanced cervical cancers were enrolled on a prospective, observational clinical trial with a rectal swab sample collected prior to chemoradiation. Bacterial DNA was extracted from each sample and divided in two parts for 16S or WMS sequencing. We used measures of diversity richness and evenness as comparators of 16S and WMS sequencing. Relative abundances of the most common taxa were also compared between both datasets. Both techniques were tested against baseline patient demographics to assess associations identified with either or both methods. Results: Comparative indices were highly congruent between 16S and WMS. The most abundant genera for 16S and WMS data did not overlap. Overlap was observed at the Phylum level, as expected. However, relative abundances correlated poorly between the two methodologies (all p>0.05). Hierarchical clustering of both sequencing analyses identified overlapping enterotypes. Both approaches were in agreement with regard to demographic variables. Conclusion: Diversity, evenness and richness are comparable when using 16S and WMS techniques, however relative abundances of individual genera are not. Clinical associations with diversity and evenness metrics were similarly identified with WMS or 16S. Importance: The gut microbiome plays an important role in regulating human health and disease. 16S rRNA gene sequencing (16S) and the whole-metagenome shotgun DNA sequencing (WMS) are two approaches to describe the microbial community. 16S sequencing via any amplicon sequencing-based method offers advantages over WMS in terms of precision (specific gene targeting). Additionally, 16S has historically been less costly due to the simplicity of library preparation and it does not require the same level read coverage as WMS. In this study, we performed both sequencing methods on a single rectal swab sample obtained from each cervical cancer patient prior to treatment. We showed that these two methods provide comparable information for diversity, evenness, and richness at higher taxonomic resolution, but are discrepant at a lower resolution. These methodological findings provide valuable information for the design and interpretation of future investigations of the role of the gut microbiome in cancer. Tweet: (optional: 256 words, please submit a Tweet that conveys the essential message of your manuscript.) 16S may be sufficient for most initial studies of the gut microbiome in cancer patients, but WMS may be required for analysis of lower level taxonomy. Research support: This research was supported in part by the Radiological Society of North America Resident/Fellow Award (to L.E.C.), the National Institutes of Health (NIH) through MD Anderson’s Cancer Center Support Grant P30CA016672, the Emerson Collective and the National Institutes of Health T32 grant #5T32 CA101642-14 (T.T.S). This study was partially funded by The University of Texas MD Anderson Cancer Center HPV-related Cancers Moonshot (L.E.C and A.K.).

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Authors
Biegert, G., Karpinets, T., Wu, X., Alam, M. B. E., Sims, T. T., Yoshida-Court, K., Lynn, E. J., Yue, J., Medrano, A. D., Petrosino, J., Mezzari, M. P., Ajami, N. J., Solley, T., Ahmed-Kaddar, M., Colbert, L. E., & Klopp, A. H.
Affiliations
  • The University of Texas MD Anderson Cancer Center (US)
  • Baylor College of Medicine (US)
Corresponding author
  • Colbert, Lauren Elizabeth
  • Klopp, Ann H.
Venue
bioRxiv (Cold Spring Harbor Laboratory)
Publisher
openRxiv
Published
2020-05-08
OpenAlex
W4236994032
Cited by
1
References
30
Citations by year
2021: 1
Type
posted content
Language
en
Open access
Locations
bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
Funders
  • Radiological Society of North America
  • Emerson Collective
  • National Institutes of Health (T32 grant, CA101642, CA101642-14)
  • University of Texas MD Anderson Cancer Center (CA101642, P30-CA-016672)
  • National Cancer Institute (P30CA016672, T32CA101642)
  • Moonshot Research and Development Program
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
gut microbiota, cervical cancer, 16S rRNA gene sequencing, shotgun metagenomics, method comparison, microbial diversity, alpha diversity, beta diversity, enterotypes, rectal swabs, fecal microbiota, chemoradiotherapy, locally advanced cervical cancer, taxonomic resolution

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