Association between the vaginal microbiome and high-risk human papillomavirus infection in pregnant Chinese women

Study information

Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

study design

prospective cohort

Citation

PMID PubMed identifier for scientific articles.

31370796

DOI Digital object identifier for electronic documents.

10.1186/s12879-019-4279-6

URI

Authors

Chen Y, Hong Z, Wang W, Gu L, Gao H, Qiu L, Di W

Journal

BMC infectious diseases

Year

2019

Keywords:

High-risk human papillomavirus, Pregnancy, Vaginal microbiome

BACKGROUND: In this study, the association between high-risk human papillomavirus (hrHPV) infection and the vaginal microbiome in pregnant women was evaluated in Chinese cohorts. METHODS: The vaginal bacterial composition of four groups, 38 hrHPV-infected pregnant women (PHR, n = 38), pregnant women without HPV infection (PN, n = 48), nonpregnant women with hrHPV infection (NPHR, n = 19) and nonpregnant women without HPV infection (NPN, n = 30), was characterized by deep sequencing of barcoded 16S rRNA gene fragments (V3-4) using Illumina MiSeq. RESULTS: The results revealed that both pregnancy and HPV infection can increase vaginal bacterial microbial richness and diversity, with the bacterial composition being most influenced by pregnancy. Lactobacillus was the most dominant genus among all samples. NPN samples were dominated by CST (community state type) III, mainly composed of Lactobacillus iners. Both pregnancy and hrHPV infection were accompanied by an increased proportion of CST I (dominated by Lactobacillus crispatus), as opposed to CST III. Bifidobacterium, Bacillus, Megasphaera, Sneathia, Prevotella, Gardnerella, Fastidiosipila and Dialister were found to be biomarkers for hrHPV-infected women, though different genera (Bifidobacterium, Megasphaera, Bacillus, Acidovorax, Oceanobacillus and Lactococcus) were associated with hrHPV-infected pregnant women. CONCLUSIONS: This work uncovered a probable synergistic effect of hrHPV infection and pregnancy on the vaginal microbial composition. HPV infection in pregnant women was associated with a more complex and diverse microbial environment.

Experiment 1

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Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks, Victoria

Subjects

Location of subjects: China

Host species Species from which microbiome was sampled. Contact us to have more species added.: Homo sapiens

Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology: Posterior fornix of vagina Pars posterior fornicis vaginae,Posterior fornix,Posterior part of fornix of vagina,Posterior fornix of vagina,posterior fornix of vagina

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology

Group 0 name Corresponds to the control (unexposed) group for case-control studies: non pregnant no HPV

Group 1 name Corresponds to the case (exposed) group for case-control studies: non pregnant high risk HPV

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: non pregnant high risk HPV confirmed using HPV genotyping kit

Group 0 sample size Number of subjects in the control (unexposed) group: 30

Group 1 sample size Number of subjects in the case (exposed) group: 19

Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any): 2 weeks

Lab analysis

Sequencing type: 16S

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: V3-V4

Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance: Illumina

Statistical Analysis

Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).: relative abundances

Statistical test: LEfSe

Significance threshold p-value or FDR threshold used for differential abundance testing (if any): 0.05

MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?: No

LDA Score above Threshold for the linear discriminant analysis (LDA) score for studies using the popular LEfSe tool: 3.5

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness: increased

Chao1 Abundance-based estimator of species richness: increased

Richness Number of species: increased

Signature 1

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Curated date: 2021/01/10

Curator: Cynthia Anderson

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Source: Figure 5

Description: The unique taxa and microbiomarkers for different groups

Abundance in Group 1: increased abundance in non pregnant high risk HPV

NCBI	Quality Control	Links
Bifidobacterium
Bacteroidota
Bacillales
Bacillaceae
Bacillus

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Signature 2

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Needs review

Curated date: 2021/01/10

Curator: Cynthia Anderson

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Source: Figure 5

Description: The unique taxa and microbiomarkers for different groups

Abundance in Group 1: decreased abundance in non pregnant high risk HPV

NCBI	Quality Control	Links
Lactobacillus
Lactobacillaceae
Lactobacillales

Revision editor(s): WikiWorks

Experiment 2

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Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

Curated date: 2021/01/10

Curator: WikiWorks

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Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies: pregnant no HPV

Group 1 name Corresponds to the case (exposed) group for case-control studies: pregnant high risk HPV

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: pregnant high risk HPV confirmed using HPV genotyping kit