ArticlePregnancy hypertension2024
Low indoleamine 2, 3 dioxygenase (IDO) activity is associated with psycho-obstetric risk.
Article in Pregnancy hypertension, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 5 citations in OpenAlex.
- Role of microbial metabolites in the pathogenesis of hypertensive disorders of pregnancy: From short‑chain fatty acids to tryptophan metabolites (Review).Molecular medicine reports · 2026Review
- Peripartum sertraline impacts maternal neurobehavioral and neurodegenerative mechanisms in pregnant and postpartum mice.Molecular psychiatry · 2025Article
- Psilocin alleviates acute itch in mice: possible involvement of 5-HT2A receptors and kynurenine pathway.Naunyn-Schmiedeberg's archives of pharmacology · 2025Article
- The role of the placenta-brain axis in psychoneuroimmune programming.Brain, behavior, & immunity - health · 2024Article
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Authors and funding
12 authors at 1 institution in 1 country.
Funding
Abstract
objectivesPreeclampsia and depression in pregnancy are among the most prevalent obstetric disorders with no known cures. While depression and preeclampsia each increase risk for the other, shared mechansisms are unclear. One possibility is low levels of Indoleamine 2,3 dioxygenase (IDO), which links immune dysregulation and oxidative arterial damage resulting in poor vascular function in both preeclampsia and depression. We hypothesized low circulating IDO activity levels in pregnancy would correspond to poor vascular function and depression symptoms. STUDY
designIn this nested case-control study, clinical, demographic, and biologic data from a cohort of pregnant women recruited to longitudinal studies measuring noninvasive vascular function and circulating factors were analyzed.
main outcome measureIDO activity across all three trimesters of pregnancy was measured using a colorimetric assay. Carotid-femoral pulse wave velocity (cfPWV), a measure of arterial stiffness, was also assessed throughout gestation by non-invasive applanation tonometry. Depression symptoms were assessed in pregnancy via the validated patient health questionnaire 9 (PHQ9).
resultsParticipants with low second and third trimester IDO activity had significantly decreased cfPWV. This association remained statistically significant when controlled for confounders such as BMI and chronic hypertension in the third but not second trimester. While PHQ9 scores were not associated with cfPWV differences, IDO activity was lower in moderate and severely depressed relative to non-depressed pregnant individuals.
conclusionThese results implicate IDO in arterial stiffness and depression symptoms, suggesting that decreased IDO may be a central target for improved psycho-obstetric health.
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