The Association Between Gestational Diabetes and Microbiota in Placenta and Cord Blood
From BugSigDB
Jump to:navigation, search
Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Authors
Tang N, Luo ZC, Zhang L, Zheng T, Fan P, Tao Y, Ouyang F
Journal
Frontiers in endocrinology
Year
2020
Keywords:
China, cord blood, gestational diabetes mellitus (GDM), microbiota, placenta
Objective: Early life is a critical period for gut microbial development. It is still controversial whether there is placental microbiota during a healthy pregnancy. Gestational diabetes mellitus (GDM) is associated with increased risk of metabolic syndrome in the offspring, and the mechanisms are unclear. We sought to explore whether microbiota in placenta and cord blood may be altered in GDM. Methods: Placenta and cord blood samples were collected from eight GDM and seven euglycemic (control) term pregnancies in cesarean deliveries without evidence of clinical infections. The Illumina MiSeq Sequencing System was used to detect the microbiota based on the V3-V4 hypervariable regions of the 16S ribosomal RNA gene. Results: The microbiota were detectable in all placental samples. Comparing GDM vs. controls, there were more operational taxonomic units (OTUs) (mean ± SE = 373.63 ± 14.61 vs. 332.43 ± 9.92, P = 0.024) and higher ACE index (395.15 ± 10.56 vs. 356.27 ± 8.47, P = 0.029) and Chao index (397.67 ± 10.24 vs. 361.32 ± 8.87, P = 0.04). The placental microbiota was mainly composed of four phyla: Bacteroidetes, Firmicutes, Actinobacteria, and Proteobacteria at the phylum level and 10 dominant genera at the genus level in both GDM and controls. Despite the dominant similarity in microbiota composition, at the OTU level, the abundance of Ruminococcus, Coprococcus, Paraprevotella, and Lactobacillus were higher, whereas Veillonella was lower in the placentas of GDM vs. controls. The microbiota was detected in one of the 15 cord blood samples, and its components were similar as to the corresponding placental microbiota at both phylum and genus levels suggesting placental microbiota as the potential source. Conclusions: The most abundant phyla and genus of placental microbiota were similar in GDM and euglycemic pregnancies, but GDM was associated with higher diversity of placental microbiota. Further study is needed to confirm the existence of microbiota in cord blood in pregnancies without clinical infection.
Experiment 1
Reviewed Marked as Reviewed by Peace Sandy on 2024-1-12
Curated date: 2021/06/14
Curator: Madhubani Dey
Revision editor(s): Madhubani Dey, WikiWorks, Peace Sandy
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
- Placenta Allantoic placenta,Eutherian placenta,Placenta,placenta
- Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
- Gestational diabetes diabetes in pregnancy,GDM,gestational diabetes,gestational diabetes mellitus,maternal gestational diabetes mellitus,Gestational diabetes
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- euglycemic (control) singleton pregnant women
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Pregnant women with Gestational Diabetes Mellitus
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- Pregnant women with Gestational Diabetes Mellitus (GDM) who had prenatal care at Xinhua Hospital, a tertiary hospital in Shanghai, and were admitted to the hospital for cesarean deliveries
- Group 0 sample size Number of subjects in the control (unexposed) group
- 7
- Group 1 sample size Number of subjects in the case (exposed) group
- 8
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- Women who were treated with any antibiotics during pregnancy
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
- Mann-Whitney (Wilcoxon)
- 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
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
Reviewed Marked as Reviewed by Peace Sandy on 2024-1-12
Source: Table 3
Description: Table 3: Relative abundances (%) of placental microbiota OTUs that differed between eight women with GDM and seven women without GDM (non-GDM).
Abundance in Group 1: increased abundance in Pregnant women with Gestational Diabetes Mellitus
NCBI | Quality Control | Links |
---|---|---|
Anaerotruncus | ||
Coprococcus | ||
Defluviitaleaceae | ||
Dorea | ||
Paraprevotella | ||
Prevotella | ||
Ruminococcus | ||
unclassified Lachnospiraceae | ||
uncultured Lachnospiraceae bacterium |
Revision editor(s): Madhubani Dey, Peace Sandy
Signature 2
Reviewed Marked as Reviewed by Peace Sandy on 2024-1-12
Source: Table 3
Description: Table 3: Relative abundances (%) of placental microbiota OTUs that differed between eight women with GDM and seven women without GDM (non-GDM).
Abundance in Group 1: decreased abundance in Pregnant women with Gestational Diabetes Mellitus
NCBI | Quality Control | Links |
---|---|---|
Veillonella |
Revision editor(s): Madhubani Dey, Peace Sandy
Retrieved from "https://bugsigdb.org/w/index.php?title=Study_452&oldid=82555"
Hidden category: