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Science Bulletin

, Volume 60, Issue 16, pp 1416–1425 | Cite as

Prenatal glucocorticoid contributed to rat lung dysplasia is related to asymmetric dimethylarginine/nitric oxide pathway

  • Yu-Chieh Chen
  • Li-Tung Huang
  • You-Lin Tain
  • Chih-Cheng Chen
  • Jiunn-Ming Sheen
  • Mao-Meng Tiao
  • Chih-Min Tsai
  • Ho-Chang Kuo
  • Chao-Cheng Huang
  • Kow-Aung Chang
  • Hong-Ren YuEmail author
Article Life & Medical Sciences

Abstract

Prenatal glucocorticoids (GCs) have been used to induce maturation of preterm fetal lungs and prevent the development of respiratory distress syndrome of the premature. Pulmonary surfactant induction has been regarded as the most important effect of prenatal GCs. However, report about the prolonged effects of prenatal GCs on the development of rat lung is of limited. In this study, we tried to investigate the acute and chronic modulation effects of prenatal dexamethasone (DEX) to asymmetric dimethylarginine (ADMA)/nitric oxide (NO) signal pathway of lung tissue. Pregnant Sprague Dawley rats at gestational day 14–20 were administered i.p. DEX (0.1 mg kg−1 d−1). Acute programming effects of prenatal DEX were assessed at postnatal day 7, and long-term programming effects of offspring were assessed at day 120. We found that repetitive prenatal DEX exposure contributes to DNA oxidative damage and alveolar tissue dysplasia. Prenatal DEX treatment decreased ADMA and increased iNOS expression. Prenatal DEX treatment also increased TNF-α transcript expression and decreased HDAC2 protein expression at acute stage. In conclusion, repetitive prenatal DEX has prolonged stress damage effects on lung tissue.

Keywords

Prenatal glucocorticoids ADMA DNA oxidative damage TNF-α HDAC2 Lung dysplasia 

Notes

Acknowledgments

This work was supported in part by Grants CMRPG8B0141, CMRPG8B0142 (H. R. Yu), CMRPG8C0171 (C.H. Kang) and NSC 102-2314-B-182A-042-MY3 (H. R. Yu) from the National Science Council.

Conflict of interest

The authors declare no commercial or financial conflict of interest.

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Yu-Chieh Chen
    • 1
  • Li-Tung Huang
    • 1
  • You-Lin Tain
    • 1
  • Chih-Cheng Chen
    • 1
  • Jiunn-Ming Sheen
    • 1
  • Mao-Meng Tiao
    • 1
  • Chih-Min Tsai
    • 1
  • Ho-Chang Kuo
    • 1
  • Chao-Cheng Huang
    • 2
  • Kow-Aung Chang
    • 3
  • Hong-Ren Yu
    • 1
    Email author
  1. 1.Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Graduate Institute of Clinical Medical ScienceChang Gung University College of MedicineKaohsiungKaohsiung
  2. 2.Department of Pathology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Graduate Institute of Clinical Medical ScienceChang Gung University College of MedicineKaohsiungKaohsiung
  3. 3.Department of Anesthesiology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Graduate Institute of Clinical Medical ScienceChang Gung University College of MedicineKaohsiungKaohsiung

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