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The effects of PDE5 inhibitory drugs on renal ischemia/reperfusion injury in rats

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Abstract

The aim of the present study was to evaluate the effects of phosphodiesterase type 5 (PDE5) inhibitory drugs, Tadalafil and Sildenafil, on inducible NOS (iNOS), endothelial NOS (eNOS) and p53 genes expressions and apoptosis in ischemia/reperfusion (I/R) induced oxidative injury in rat renal tissue. Eighty Sprague–Dawley rats (300–350 g) were divided into four groups. In ischemia/reperfusion group, rats were subjected to renal ischemia by clamping the left pedicle for 60 min, and then reperfused for 90 min. On the other hand, in other two groups the rats were individually pretreated with Tadalafil and Sildenafil 1 h before the induction of ischemia. Malondialdehyde (MDA) is determined in renal tissue homogenates by high-performance liquid chromatography, the number of apoptotic cell were calculated by TUNEL method and p53 and eNOS expression were detected with immunohistochemistry. On the other hand, myeloperoxidase (MPO) levels were measured by spectrophotometric method and the mRNA level of iNOS in renal tissue was determined by Real-time PCR (RT-PCR). Our results indicate that MDA and MPO levels were increased in the I/R group than those in the control group. Both Tadalafil and Sildenafil treatment decreased the MDA levels in ischemia/reperfusion group, whereas this effect was more potent with Sildenafil. RT-PCR results showed that, iNOS gen expression increased in the I/R group, but decreased in the PDE5 inhibitory drugs treated group. Apoptotic cells, eNOS levels and p53 positive cells were also decreased in PDE5 inhibitory drugs treated group. We suggest that Tadalafil and Sildenafil have beneficial effects against I/R related renal tissue injury and this protective effect is clearer for Sildenafil than Tadalafil.

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Authors and Affiliations

  1. Department of Physiology, Medical Faculty, Dumlupinar University, Central Campus, Tavsanlı Road 10.km, 43270, Kutahya, Turkey

    A. Küçük

  2. Department of Urology, Medical Faculty, Dumlupinar University, Kutahya, Turkey

    M. Yucel

  3. Department of Physiology, Medical Faculty, Osmangazi University, Eskisehir, Turkey

    N. Erkasap & M. Ozkurt

  4. Department of Histology Embryology, Medical Faculty, Afyon Kocatepe University, Afyon, Turkey

    M. Tosun

  5. Department of Biochemistry, Medical Faculty, Afyon Kocatepe University, Afyon, Turkey

    T. Koken

  6. Department of General Surgery, Medical Faculty, Osmangazi University, Eskisehir, Turkey

    S. Erkasap

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  1. A. Küçük
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Correspondence to A. Küçük.

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Küçük, A., Yucel, M., Erkasap, N. et al. The effects of PDE5 inhibitory drugs on renal ischemia/reperfusion injury in rats. Mol Biol Rep 39, 9775–9782 (2012). https://doi.org/10.1007/s11033-012-1843-1

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  • DOI: https://doi.org/10.1007/s11033-012-1843-1

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