Gestational Diabetes — Microbiome Signature

<!— STUB: needs expansion —>

Overview

Gestational diabetes mellitus (GDM) affects ~14% of pregnancies and represents a critical window where metabolic, microbial, and metal factors converge. This signature is preliminary, built from 6 sources emphasizing fungal dysbiosis and microbiome-derived metabolite pathways.

Metallomic Signature

Confidence: preliminary

Iron elevation and zinc/selenium depletion patterns are inferred from overlap with type 2 diabetes signature and limited GDM-specific metal data. Direct metallomic studies in GDM pregnancy cohorts are needed.

Taxonomic Analysis

Confidence: preliminary

Enrichment of bacteroides and depletion of faecalibacterium prausnitzii observed across multiple studies ([1], [2]). Fungal dysbiosis — particularly shifts in Candida and Saccharomyces — is a distinctive feature ([3]).

Associated Conditions

GDM shares overlapping signatures with:

  • type 2 diabetes — shared iron/zinc patterns, Bacteroides enrichment (overlap 0.45)
  • pcos — shared iron patterns, insulin resistance mechanisms (overlap 0.30)
  • obesity — shared iron/zinc patterns (overlap 0.35)

Open Questions

  • What is the complete metallomic signature specific to GDM (vs. inherited from T2D)?
  • How does fungal-bacterial cross-kingdom interaction drive GDM pathophysiology?
  • Can preconception microbiome interventions prevent GDM in high-risk women?

Cross-References

References (6)

  1. J. Wei, Y. Qing, H. Zhou et al. (2022). Wei 2022 — 16S rRNA Gene Amplicon Sequencing of Gut Microbiota in Gestational Diabetes Mellitus. Journal of Endocrinological Investigation. doi:10.1007/s40618-021-01595-4
  2. Marketa Vavreckova, Natalie Galanova, Martin Kostovick et al. (2022). Vavreckova 2022 — Specific Gut Bacterial and Fungal Microbiota Pattern in the First Half of Pregnancy Is Linked to GDM Development. Frontiers in Endocrinology. doi:10.3389/fendo.2022.970825
  3. Wenxin Wang, Sha Lu, Yuanqing Fu et al. (2026). Wang 2026 — Intestinal Fungal Dysbiosis in Gestational Diabetes Mellitus Associated with Adverse Pregnancy Outcomes. BMC Pregnancy and Childbirth. doi:10.1186/s12884-026-08677-2
  4. Various (2023). Fungal Dysbiosis 2023 — Gut Fungal Communities in Gestational Diabetes. Scientific Reports. doi:10.1038/s41598-023-45066-7
  5. Various (2026). Fungal Dysbiosis 2026 — Pregnancy and Gestational Diabetes Reference. BMC Pregnancy and Childbirth. doi:10.1186/s12884-026-08677-2
  6. Sita Manasa Susarla, Oliver Fiehn, Ines Thiele et al. (2024). Susarla 2024 — Microbiome-Derived Metabolites in Early to Mid-Pregnancy and Risk of Gestational Diabetes. BMC Medicine. doi:10.1186/s12916-024-03606-6

Related Articles