Trial reportPloS one2020
High levels of maternal total tri-iodothyronine, and low levels of fetal free L-thyroxine and total tri-iodothyronine, are associated with altered deiodinase expression and activity in placenta with gestational diabetes mellitus.
Trial report in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
14 citing papers in PubMed, 23 citations in OpenAlex.
- Maternal thyroid function and offspring birth anthropometrics in women with polycystic ovary syndrome.Frontiers in endocrinology · 2024Trial
- Perinatal Endocrine-Cardiac Axis: A Narrative Review of Long-Term Cardiovascular Risks in Women with Gestational Diabetes, Hypertensive Disorders, and Thyroid Dysfunction.Biomedicines · 2026Review
- Fetal sex-specific differences in the placental transcriptome of gestational diabetes.Scientific reports · 2026Observational
- Low FT4 levels in early pregnancy are associated with higher insulin therapy need in women with gestational diabetes mellitus.European thyroid journal · 2026Article
- Critical Role of Iodine and Thyroid Hormones During Pregnancy.International journal of molecular sciences · 2025Review
- Gestational diabetes mellitus and its association with newborn thyroid screening: a population-based study.Endocrine connections · 2025Article
- In-utero and newborn factors and thyroid cancer incidence in adult women in the Sister Study cohort.British journal of cancer · 2025Observational
- Association between hypothyroidism and metabolic profile in gestational diabetes mellitus.Frontiers in endocrinology · 2025Article
- Association between maternal age and sex-based neonatal free triiodothyronine levels.BMC endocrine disorders · 2024Article
- Investigating open access new approach methods (NAM) to assess biological points of departure: A case study with 4 neurotoxic pesticides.Current research in toxicology · 2024Article
- Thyroid dysfunction during gestation and gestational diabetes mellitus: a complex relationship.Journal of endocrinological investigation · 2023Review
- Role and Clinical Significance of Monocarboxylate Transporter 8 (MCT8) During Pregnancy.Reproductive sciences (Thousand Oaks, Calif.) · 2023Review
- Article
- Selenoproteins in the Human Placenta: How Essential Is Selenium to a Healthy Start to Life?Nutrients · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors at 6 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Gestational Diabetes Mellitus (GDM) is characterized by abnormal maternal D-glucose metabolism and altered insulin signaling. Dysregulation of thyroid hormones (TH) tri-iodethyronine (T3) and L-thyroxine (T4) Hormones had been associated with GDM, but the physiopathological meaning of these alterations is still unclear. Maternal TH cross the placenta through TH Transporters and their Deiodinases metabolize them to regulate fetal TH levels. Currently, the metabolism of TH in placentas with GDM is unknown, and there are no other studies that evaluate the fetal TH from pregnancies with GDM. Therefore, we evaluated the levels of maternal TH during pregnancy, and fetal TH at delivery, and the expression and activity of placental deiodinases from GDM pregnancies. Pregnant women were followed through pregnancy until delivery. We collected blood samples during 10-14, 24-28, and 36-40 weeks of gestation for measure Thyroid-stimulating hormone (TSH), Free T4 (FT4), Total T4 (TT4), and Total T3 (TT3) concentrations from Normal Glucose Tolerance (NGT) and GDM mothers. Moreover, we measure fetal TSH, FT4, TT4, and TT3 in total blood cord at the delivery. Also, we measured the placental expression of Deiodinases by RT-PCR, western-blotting, and immunohistochemistry. The activity of Deiodinases was estimated quantified rT3 and T3 using T4 as a substrate. Mothers with GDM showed higher levels of TT3 during all pregnancy, and an increased in TSH during second and third trimester, while lower concentrations of neonatal TT4, FT4, and TT3; and an increased TSH level in umbilical cord blood from GDM. Placentae from GDM mothers have a higher expression and activity of Deiodinase 3, but lower Deiodinase 2, than NGT mothers. In conclusion, GDM favors high levels of TT3 during all gestation in the mother, low levels in TT4, FT4 and TT3 at the delivery in neonates, and increases deiodinase 3, but reduce deiodinase 2 expression and activity in the placenta.
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