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Correlation Analysis between GDM and Gut Microbial Composition in Late Pregnancy.

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Gestational diabetes mellitus (GDM) is linked to gut bacteria changes during pregnancy. This study found distinct gut flora profiles in GDM patients, suggesting a role for gut microbes in blood glucose regulation.

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Area of Science:

  • Microbiology
  • Endocrinology
  • Genetics

Background:

  • Gestational diabetes mellitus (GDM) affects many pregnant women globally, with unclear causes.
  • Emerging evidence points to the gut microbiome's role in GDM pathogenesis.
  • Understanding these microbial shifts is crucial for developing new treatments.

Purpose of the Study:

  • To investigate the gut microbial composition in pregnant women with GDM during their third trimester.
  • To identify specific gut bacteria that differ significantly between GDM patients and healthy pregnant women.
  • To establish a foundation for using gut microecological agents to manage GDM.

Main Methods:

  • 16S ribosomal ribonucleic acid (rRNA) gene sequencing of the V3-V4 regions was performed on stool samples.
  • The study included 52 singleton pregnant women beyond 28 weeks of gestation.
  • Comparative analysis was conducted between normal (NOR) and GDM groups, and between glucose (G) and low-glucose (LG) groups.

Main Results:

  • Significant differences in the abundance of Bacteroides, Firmicutes, and the Firmicutes/Bacteroides ratio were observed between NOR and GDM groups, and G and LG groups.
  • Eight bacterial species showed significant abundance differences between NOR and GDM groups, with some correlating to fasting blood glucose (FBG).
  • Functional analysis revealed distinct microbial metabolic pathways, including polysaccharide biosynthesis and digestive system functions, between the groups.

Conclusions:

  • Pregnant women with GDM exhibit characteristic changes in their gut microbiome during the third trimester.
  • Specific gut microbes and their metabolic functions may play a role in regulating blood glucose levels in GDM.
  • These findings support the potential of targeting the gut microbiota for GDM therapeutic strategies.