4.7 Article

Cord Serum Calcitriol Inversely Correlates with Maternal Blood Pressure in Urinary Tract Infection-Affected Pregnancies: Sex-Dependent Immune Implications

期刊

NUTRIENTS
卷 13, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/nu13093114

关键词

urinary tract infection; vitamin D; blood pressure; calcitriol; pregnancy

资金

  1. Department of Reproductive Biology Carlos Gual Castro, at Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Mexico City, Mexico
  2. Instituto Nacional de Perinatologia Isidro Espinosa de los Reyes [3210-21205-01-14]
  3. Consejo Nacional de Ciencia y Tecnologia (CONACyT) [CB2014-24162]

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The study found that pregnant women with UTI have higher levels of calcitriol and cathelicidin in the placenta, with a strong negative correlation with maternal blood pressure. UTI cases related to female fetuses had higher levels of cathelicidin and the activating enzyme CYP27B1, showing significant differences compared to male fetuses and the normal pregnancy control group.
Urinary tract infections (UTI) during pregnancy are frequently associated with hypertensive disorders, increasing the risk of perinatal morbidity. Calcitriol, vitamin D-3's most active metabolite, has been involved in blood pressure regulation and prevention of UTIs, partially through modulating vasoactive peptides and antimicrobial peptides, like cathelicidin. However, nothing is known regarding the interplay between placental calcitriol, cathelicidin, and maternal blood pressure in UTI-complicated pregnancies. Here, we analyzed the correlation between these parameters in pregnant women with UTI and with normal pregnancy (NP). Umbilical venous serum calcitriol and its precursor calcidiol were significantly elevated in UTI. Regardless of newborn's sex, we found strong negative correlations between calcitriol and maternal systolic and diastolic blood pressure in the UTI cohort (p < 0.002). In NP, this relationship was observed only in female-carrying mothers. UTI-female placentas showed higher expression of cathelicidin and CYP27B1, the calcitriol activating-enzyme, compared to male and NP samples. Accordingly, cord-serum calcitriol from UTI-female neonates negatively correlated with maternal bacteriuria. Cathelicidin gene expression positively correlated with gestational age in UTI and with newborn anthropometric parameters. Our results suggest that vitamin D deficiency might predispose to maternal cardiovascular risk and perinatal infections especially in male-carrying pregnancies, probably due to lower placental CYP27B1 and cathelicidin expression.

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