Objectives: Preeclampsia 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 Design: In 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 Measure: IDO 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).
Results: Participants 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.
Conclusion: These 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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http://dx.doi.org/10.1016/j.preghy.2023.11.008 | DOI Listing |
Exp Neurol
January 2025
Laboratory of Neurodegenerative Diseases and Neuroinjury Diseases, Wuxi, School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China; MOE Medical Basic Research Innovation Center for Gut Microbiota and Chronic Diseases, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China. Electronic address:
Abnormal tryptophan metabolism is closely linked with neurological disorders. Research has shown that indoleamine 2,3-dioxygenase 1 (IDO-1), the first rate-limiting enzyme in tryptophan degradation, is upregulated in Parkinson's disease (PD). However, the precise role of IDO-1 in PD pathogenesis remains elusive.
View Article and Find Full Text PDFBMJ Open
January 2025
Department of Law, Afe Babalola University, Ado-Ekiti, Nigeria.
Objectives: Long-acting reversible contraception (LARC) provides continuous pregnancy prevention to women for a period of 3 to 12 years, and it is very safe and effective. The aim of this study was to determine the prevalence, determinants and willingness to use LARC among undergraduate female students attending public and private universities in Ekiti State, Southwest Nigeria DESIGN: This survey employed a cross-sectional comparative study design.
Setting: Public and private universities in Ekiti State, Southwest Nigeria.
Nat Commun
January 2025
Institute of Regenerative Biology and Medicine, Chinese Institutes for Medical Research, Beijing, China.
Lung fibrosis development utilizes alveolar macrophages, with mechanisms that are incompletely understood. Here, we fate map connective tissue during mouse lung fibrosis and observe disassembly and transfer of connective tissue macromolecules from pleuro-alveolar junctions (PAJs) into deep lung tissue, to activate fibroblasts and fibrosis. Disassembly and transfer of PAJ macromolecules into deep lung tissue occurs by alveolar macrophages, activating cysteine-type proteolysis on pleural mesothelium.
View Article and Find Full Text PDFFront Cell Infect Microbiol
January 2025
Department of Infectious Diseases, Tianjin Second People's Hospital, Tianjin, China.
Background: Although MDSCs are widely recognized for their immunoinhibitory effects in pathological conditions, their function during HIV infection particularly within the mechanisms underlying incomplete immune recovery remains elusive.
Methods: We conducted a cross-sectional study in which 30 healthy controls and 62 HIV-1-infected subjects [31 immunological non-responders (INRs) and 31 immunological responders (IRs)] were selected. The proportion of MDSCs was determined in each category of participants.
J Funct Biomater
December 2024
Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
CY1-4, 9-nitropyridine [2',3':4,5] pyrimido [1,2-α] indole -5,11- dione, is an indoleamine 2,3-dioxygenase (IDO) inhibitor and a poorly water-soluble substance. It is very important to increase the solubility of CY1-4 to improve its bioavailability and therapeutic effect. In this study, the mesoporous silica nano-skeleton carrier material Sylysia was selected as the carrier to load CY1-4, and then the CY1-4 nano-skeleton drug delivery system (MSNM@CY1-4) was prepared by coating the hydrophilic polymer material Hydroxypropyl methylcellulose (HPMC) and the lipid material Distearoylphosphatidyl-ethanolamine-poly(ethylene glycol) (DSPE-PEG) to improve the anti-tumor effect of CY1-4.
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