期刊
REPRODUCTIVE SCIENCES
卷 24, 期 1, 页码 77-84出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1933719116649697
关键词
fetal inflammation; fetal heart; preterm birth; sheep; TDI echocardiography; candidiasis
资金
- British Maternal and Fetal Medicine Society (United Kingdom)
- Tommy's Baby Charity (United Kingdom)
- Financial Markets Foundation for Children (Australia)
- Royal Society International Exchange Grant (United Kingdom)
- NHMRC [GNT1049148]
- Women and Infants Research Foundation (Perth, Australia)
Introduction: Several recent studies have identified a potential role for intrauterine Candida albicans in adverse pregnancy outcomes, including preterm birth. There is, however, a limited understanding of the impact of intrauterine candida infection on fetal well-being in early pregnancy. Using a sheep model of early pregnancy, the aims of this study were to determine (1) the ability of experimentally induced intrauterine C albicans to infect the fetus and (2) whether C albicans exposure in early pregnancy is associated with alterations in fetal cardiac function, as measured by spectral tissue Doppler imaging analysis of fetal cardiac function. Methods: Merino ewes carrying singleton pregnancies at 89 days' gestation (term is approximate to 150 days) received C albicans (n = 8) via ultrasound-guided intra-amniotic injection. Saline-exposed fetuses served as controls (n = 6). Spectral tissue Doppler imaging echocardiography and amniotic fluid collection were performed at baseline and 24 and 72 hours after intrauterine C albicans injection. Fetal tissues were collected at postmortem for analysis of infection and inflammation. Results: Relative to saline control, intrauterine C albicans infection resulted in pronounced increases in amniotic fluid tumor necrosis factor (TNF-; P < .05) and cytokine/chemokine messenger RNA (interleukin [IL] 1, IL-6, TNF-, and monocyte chemoattractant protein 1; P < .05) in the fetal myocardium, lung, skin, and liver at 72 and 96 hours postinfection. Spectral tissue Doppler imaging showed diastolic dysfunction at 24 hours and severe biventricular diastolic dysfunction 72 hours postinfection. Conclusion: Intrauterine C albicans infection in a sheep model of early pregnancy causes systemic fetal candidiasis, which is associated with a robust systemic inflammatory response and progressive cardiac dysfunction detectable by spectral tissue Doppler imaging.
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