Journal
PHYSIOLOGICAL GENOMICS
Volume 53, Issue 3, Pages 125-136Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/physiolgenomics.00121.2020
Keywords
chronic hypertension; dysbiosis; microbiome; preeclampsia; pregnancy
Categories
Funding
- National Institutes of Health [R01HL134711, R01HL137673]
- American Heart Association [20PRE35120561]
- NIGMS
- Mississippi INBRE [P20GM103476]
- Obesity, Cardiorenal and Metabolic Diseases-COBRE [P20GM104357]
- Mississippi Center of Excellence in Perinatal Research (MSCEPR)-COBRE [P20GM121334]
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The study suggests that there may be an association between chronic hypertension and gut microbiome dysbiosis in pregnancy, which hinders gut microbial composition remodeling during superimposed preeclampsia.
Preeclampsia is a progressive hypertensive disorder of pregnancy affecting 2%-8% of pregnancies globally. Preexisting chronic hypertension is a major risk factor associated with developing preeclampsia, and growing evidence suggests a role for the gut microbiome in the development of preeclampsia. However, neither alterations in the gut microbiome associated with preeclampsia nor the mechanisms involved are fully understood. In this study, we tested the hypothesis that normal gestational maternal gut microbiome remodeling is impaired in the Dahl salt-sensitive (Dahl S) rat model of superimposed preeclampsia. Gut microbiome profiles of pregnant Dahl S, normal pregnant Sprague-Dawley (SD), and matched virgin controls were assessed by 16S rRNA gene sequencing at baseline; during early, middle, and late pregnancy; and 1-wk postpartum. Dahl S rats had significantly higher abundance in Proteobacteria, and multiple genera were significantly different from SD rats at baseline. The pregnant SD displayed a significant increase in Proteobacteria and genera such as Helicobacter, but these were not different between pregnant and virgin Dahl S rats. By late pregnancy, Dahl S rats had significantly lower a-diversity and Firmicutes compared with their virgin Dahl S controls. b-diversity was significantly different among groups (P < 0.001). KEGG metabolic pathways including those associated with short-chain fatty acids were different in Dahl S pregnancy but not in SD pregnancy. These results reveal an association between chronic hypertension and gut microbiome dysbiosis which may hinder pregnancy-specific remodeling in the gut microbial composition during superimposed preeclampsia.
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