Alterations in Serum Magnesium Levels in Hyperbili-rubinemic Neonates Before and After Phototherapy

Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IRJN-11-2_004

تاریخ نمایه سازی: 24 تیر 1399

Abstract:

Background: Bilirubin binds to cell membrane phospholipids, including N-methyl D-aspartate receptor, and causes excessive activation that can lead to neurotoxic effects. Since magnesium is an important inhibitor of this receptor, a comparison can be made between the physiological effects of magnesium and the neurological effects of bilirubin. This study aimed to compare changes in serum magnesium levels before and after phototherapy in hyperbilirubinemic newborns.Methods: This retrospective cross-sectional study examined full-term newborns with hyperbilirubinemia. These newborns were admitted between 2012 and 2014 to the Neonatal Unit of Children’s Medical Center in Tehran, Iran. Based on the amount of bilirubin upon admission, participants were divided into three groups of mild (20 mg/dl). The total serum magnesium levels were measured before and 12-24 h after phototherapy.Results: A total of 143 newborns were included in this study. A significant difference was observed between serum magnesium levels before (2.42±0.46 mg/dl) and after (2.07±0.32 mg/dl) phototherapy (P<0.001). This difference was observed in all etiologies of icterus.Conclusion: The magnesium level decreased significantly after the completion of jaundice treatment for all causes of the condition. These findings raise the hypothesis that an increase in the level of extracellular magnesium is a defense mechanism that reduces the neurotoxic effects of bilirubin.

Authors

Ziba Mosayebi

Maternal-Fetal and Neonatal Health Research Center, Tehran University of Medical Sciences, Tehran, Iran.

Maral Rahmani

Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Shahin Behjati

Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Zeinab Kaviani

Breastfeeding Research Center, Tehran University of Medical Sciences, Tehran, Iran

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