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Coenzyme Q10 protect against ischemia/reperfusion induced biochemical and functional changes in rabbit urinary bladder

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Abstract

Purpose Ischemia, reperfusion, and free radical generation have been recently implicated in the progressive bladder dysfunction. Coenzyme Q10 (CoQ10) is a pro-vitamin like substance that appears to be efficient for treatment of neurodegenerative disorders and ischemic heart disease. Our goal was to investigate the potential protective effect of CoQ10 in a rabbit model of in vivo bilateral ischemia and ischemia/reperfusion (I/R). Material and Methods Six groups of four male New Zealand White rabbits each were treated with CoQ10 (3 mg/kg body weight/day—dissolved in peanut oil) (groups 1–3) or vehicle (peanut oil) (groups 4–6). Groups 1 and 4 (ischemia-alone groups) had clamped bilateral vesical arteries for 2 h; in groups 2 and 5 (I/R groups), bilateral ischemia was similarly induced and the rabbits were allowed to recover for 2 weeks. Groups 3 and 6 were controls (shams) and were exposed to sham surgery. The effects on contractile responses to various stimulations and biochemical studies such as citrate synthase (CS), choline acetyltransferase (ChAT), superoxide dismutase (SOD), and catalase (CAT) were evaluated. The protein peroxidation indicator, carbonyl group, and nitrotyrosine contents were analyzed by Western blotting. Results Ischemia resulted in significant reductions in the contractile responses to all forms of stimulation in vehicle-fed rabbits, whereas there were no reductions in CoQ10-treated rabbits. Contractile responses were significantly reduced in vehicle-treated I/R groups, but significantly improved in CoQ10-treated rabbits. Protein carbonylation and nitration increased significantly in ischemia-alone and I/R bladders; CoQ10 treatment significantly attenuated protein carbonylation and nitration. CoQ10 up-regulated SOD and CAT activities in control animals; the few differences in CoQ10-treated animal in SOD and CAT after ischemia and in general increase CAT activities following I/R. Conclusions CoQ10 supplementation provides bladder protection against I/R injury. This protection effect improves mitochondrial function during I/R by repleting mitochondrial CoQ10 stores and potentiating their antioxidant properties.

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Acknowledgments

This material is based upon work supported in part by the Office of Research and Development Medical Research Service, Department of Veteran’s Affairs; in part by NIH grant RO-1-DK 067114.

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Authors and Affiliations

  1. Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan

    Yung-Shun Juan

  2. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan

    Yung-Shun Juan & Chun-Hsiung Huang

  3. Albany College of Pharmacy, 106 New Scotland Avenue, Albany, NY, 12208, USA

    Tasmina Hydery, Catherine Schuler, Robert E. Leggett, Wei-Yu Lin & Robert M. Levin

  4. Albany Medical College, Albany, NY, USA

    Anita Mannikarottu, Barry Kogan & Robert M. Levin

  5. Stratton Veterans Affairs Medical Center, Albany, NY, USA

    Catherine Schuler, Robert E. Leggett, Wei-Yu Lin & Robert M. Levin

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  1. Yung-Shun Juan
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  2. Tasmina Hydery
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  3. Anita Mannikarottu
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  4. Barry Kogan
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  5. Catherine Schuler
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  6. Robert E. Leggett
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  7. Wei-Yu Lin
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  8. Chun-Hsiung Huang
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  9. Robert M. Levin
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Correspondence to Robert M. Levin.

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Juan, YS., Hydery, T., Mannikarottu, A. et al. Coenzyme Q10 protect against ischemia/reperfusion induced biochemical and functional changes in rabbit urinary bladder. Mol Cell Biochem 311, 73–80 (2008). https://doi.org/10.1007/s11010-007-9696-y

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  • DOI: https://doi.org/10.1007/s11010-007-9696-y

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