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Journal of Physiology and Biochemistry

, Volume 70, Issue 1, pp 73–79 | Cite as

Effect of melatonin supplementation and cross-fostering on renal glutathione system and development of hypertension in spontaneously hypertensive rats

  • Lee Siew-Keah
  • Arunkumar Sundaram
  • K. N. S. SirajudeenEmail author
  • Rahimah Zakaria
  • H. J. Singh
Original Paper

Abstract

Antenatal and postnatal environments are hypothesised to influence the development of hypertension. This study investigates the synergistic effect of cross-fostering and melatonin supplementation on the development of hypertension and renal glutathione system in spontaneously hypertensive rats (SHR). In one experiment, 1-day-old male SHR pups were fostered to either SHR (shr-SHR) or Wistar-Kyoto rats, (shr-WKY). In a concurrent experiment, SHR dams were given melatonin in drinking water (10 mg/kg body weight) from day 1 of pregnancy. Immediately following delivery, 1-day-old male pups were fostered either to SHR (Mel-shr-SHR) or WKY (Mel-shr-WKY) dams receiving melatonin supplementation until weaning on day 21. Upon weaning, melatonin supplementation was continued to these pups until the age of 16 weeks. Systolic blood pressures (SBP) were recorded at the age of 4, 6, 8, 12 and 16 weeks. Renal antioxidant activities were measured. Mean SBP of shr-WKY, Mel-shr-SHR and Mel-shr-WKY was significantly lower than that in shr-SHR until the age of 8 weeks. At 12 and 16 weeks of age, mean SBP of Mel-shr-WKY was lower than those in non-treated shr-SHR and shr-WKY pups but was not significantly different from that in Mel-shr-SHR. Renal glutathione peroxidase (GPx) and glutathione S-transferase (GST) activities were significantly higher in Mel-shr-SHR and Mel-shr-WKY at 16 weeks of age. It appears that combination of cross-fostering and melatonin supplementation exerts no synergistic effect on delaying the rise in blood pressure in SHR. The elevated GPx and GST activities are likely to be due to the effect of melatonin supplementation.

Keywords

Cross-fostering Melatonin Maternal environment Glutathione system SHR 

Notes

Acknowledgments

This study was supported by the Research University Grant Scheme (RU 1001/PPSP/811018) provided by Universiti Sains Malaysia. The first author was sponsored by Universiti Sains Malaysia Research University Fellowship and the second author was sponsored by the Ministry of Science, Technology and Innovation Malaysia.

Conflicts of interest

No conflicts of interest, financial or otherwise are declared by the author(s).

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Copyright information

© University of Navarra 2013

Authors and Affiliations

  • Lee Siew-Keah
    • 1
    • 4
  • Arunkumar Sundaram
    • 1
  • K. N. S. Sirajudeen
    • 2
    Email author
  • Rahimah Zakaria
    • 1
  • H. J. Singh
    • 3
  1. 1.Department of Physiology, School of Medical SciencesUniversiti Sains MalaysiaKubang KerianMalaysia
  2. 2.Department of Chemical Pathology, School of Medical SciencesUniversiti Sains MalaysiaKubang KerianMalaysia
  3. 3.Faculty of MedicineUniversiti Teknologi MARAShah AlamMalaysia
  4. 4.Faculty of Pharmaceutical SciencesUCSI UniversityKuala LumpurMalaysia

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