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Blood Microbial Communities During Pregnancy Are Associated With Preterm Birth

Title
Blood Microbial Communities During Pregnancy Are Associated With Preterm Birth
Authors
You, Young-AhYoo, Jae YoungKwon, Eun JinKim, Young Ju
Ewha Authors
김영주유영아권은진
SCOPUS Author ID
김영주scopus; 유영아scopus
Issue Date
2019
Journal Title
FRONTIERS IN MICROBIOLOGY
ISSN
1664-302XJCR Link
Citation
FRONTIERS IN MICROBIOLOGY vol. 10
Keywords
blood microbiotapregnancypreterm birth16S rRNA gene sequencingmicrobiome
Publisher
FRONTIERS MEDIA SA
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Microbial infection of the placenta, amniotic fluid, vaginal canal, and oral cavity is known to significantly contribute to preterm birth (PTB). Although microbes can be translocated into the blood, little is known regarding the blood microbiota during pregnancy. To assess changes in the microbiome during pregnancy, blood samples were obtained 2 or 3 times during pregnancy from a cohort of 45 pregnant women enrolled between 2008 and 2010. To analyze the association with PTB, we conducted a case-control study involving 41 pregnant women upon admission for preterm labor and rupture of membrane (20 with term delivery; 21 with PTB). Bacterial diversity was assessed in number and composition between the first, second, and third trimesters in term delivered women according to 16S rRNA gene amplicon sequencing, and data were analyzed using Quantitative Insight Into Microbial Ecology (QIIME). Taxonomy was assigned using the GreenGenes 8.15.13 database. Dominant microorganisms at the phylum level in all pregnant women were identified as Firmicutes, Proteobacteria, Bacteroidetes, and Actinobacteria. However, the number and composition of bacteria in women with PTB differed from that in women with term delivery. Firmicutes and Bacteroidetes were more abundant in women with PTB than in women with term delivery, while Proteobacteria was less prevalent in women with PTB. At the genus level, Bacteroides, Lactobacillus, Sphingomonas, Fastidiosipila, Weissella, and Butyricicoccus were enriched in PTB samples. These observational results suggest that several taxa in the maternal blood microbiome are associated with PTB. Further studies are needed to confirm the composition of the blood microbiota in women with PTB. Additionally, the mechanism by which pathogenic microbes in maternal blood cause infection and PTB requires further analysis.
DOI
10.3389/fmicb.2019.01122
Appears in Collections:
의과대학 > 의학과 > Journal papers
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