Gestational gut microbial remodeling is impaired in a rat model of preeclampsia superimposed on chronic hypertension.

Abstract:

: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 one-week 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 to their virgin Dahl S controls. β-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.

journal_name

Physiol Genomics

journal_title

Physiological genomics

authors

Ishimwe JA,Akinleye AA,Johnson AC,Garrett MR,Sasser JM

doi

10.1152/physiolgenomics.00121.2020

subject

Has Abstract

pub_date

2021-01-25 00:00:00

eissn

1094-8341

issn

1531-2267

pub_type

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