Altered expressions of endothelial junction protein of placental capillaries in premature infants with intraventricular hemorrhage

  • Maria Ekawati Biomedical Sciences Doctoral Program Study, Faculty of Medicine, Universitas Indonesia, Jakarta
  • Ninik Mujihartini Center of Hypoxia and Oxydative Stress Study, Departement of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia, Jakarta
  • Ahmad A. Jusuf Department of Histology, Faculty of Medicine, Universitas Indonesia, Jakarta
  • Nani Dharmasetiawani Department of Child Health, Budi Kemuliaan Women and Children Hospital, Jakarta
  • Sri W.A. Jusman Department of Biochemistry and Biology Molecular, Faculty of Medicine, Universitas Indonesia, Jakarta
  • Mohamad Sadikin Department of Biochemistry and Biology Molecular, Faculty of Medicine, Universitas Indonesia, Jakarta
DOI: https://doi.org/10.13181/mji.v25i3.1287
Keywords: endothelial junction protein, intraventricular hemorrhage, hypoxia, oxidative stress
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Abstract

Background: Placental hypoxia may lead to oxidative stress, which inflicts damage to capillary protein junction. The aim of this study was to evaluate altered expression of endothelial junction protein of capillaries in hypoxia condition and to observe its correlation with the incidence of  intraventricular hemorrhage in premature infants.

Methods: A cross-sectional study was conducted by using placental tissues of premature infants as amodel of capillary integrity (29 hypoxic and 29 non-hypoxic). Hypoxia inducible factor (HIF)-1α was measured to define placental tissue response to hypoxia; malondialdehyde (MDA) and glutathione (GSH) served as markers of oxidative stress. The expressions of junctional proteins, N-cadherin and occludin were analyzed by immunohistochemistry. Intraventricular hemorrhage (IVH) was detected by cranial ultrasound at the third day. Unpaired t test, Mann-Whitney, and Chi-square tests were used to analyze the data.

Results: The HIF-1α and MDA levels were slightly, but not significantly, higher in hypoxia group {13.64±8.70 pg/mg protein and 10.31 pmol/mg tissue (ranged 1.92–93.61), respectively} compared to non- hypoxia group {10.65±5.35 pg/mg protein and 9.77 pmol/mg tissue (ranged 2.42–93.31)}. GSH levels were not different in both groups (38.14 (ranged 9.44–118.91) and 38.47(ranged 16.49–126.76) ng/mg protein, respectively. mRNA expression of N-cadherin (0.13) and occludin (0.096) were significantly lower in hypoxia comparedto non-hypoxia group (p=0,001), while protein expression of N-cadherin (3.4; 75.9; 6.9; 13.8%) and occludin (20.7; 3.4; 69.0; 3.4; 6.9%) in hypoxia group was not associated with IVH (p=0.783 and p=0.743).

Conclusion: Hypoxia altered expression of endothelial junction protein in placental capillaries, but no association with intraventricular hemorrhage was observed.

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Published
2016-10-14
How to Cite
1.
Ekawati M, Mujihartini N, Jusuf AA, Dharmasetiawani N, Jusman SW, Sadikin M. Altered expressions of endothelial junction protein of placental capillaries in premature infants with intraventricular hemorrhage. Med J Indones [Internet]. 2016Oct.14 [cited 2024Apr.20];25(3):143-50. Available from: http://mji.ui.ac.id/journal/index.php/mji/article/view/1287
Issue
Vol. 25 No. 3 (2016): September
Section
Clinical Research

Copyright (c) 2016 Maria Ekawati, Ninik Mujihartini, Ahmad A. Jusuf, Nani Dharmasetiawani, Sri W.A. Jusman, Mohamad Sadikin

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