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The role of protein oxidation and DNA damage in elderly hypertension

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Abstract

Introduction

This study aimed to evaluate the role of protein oxidation and DNA damage in the elderly hypertensive (HT) patients.

Materials and methods

This study consisted of four groups: two elderly groups with 30 HT patients and 30 normotensive healthy volunteers, and two young groups with 30 HT patients and 30 normotensive healthy volunteers. Plasma total thiol (T-SH), advanced oxidation protein products (AOPPs), protein carbonyl (PCO), ischemia modified albumin (IMA), urine 8-hydroxy-2′-deoxyguanosine (8-OHdG), and prooxidant–antioxidant balance (PAB) levels were measured.

Results

In the elderly HT group AOPPs, PCO, 8-OHdG, and PAB were significantly higher than the elderly control group. In the young HT group T-SH levels were significantly lower and the other oxidative stress parameters were significantly higher than the young control group. In the elderly control group AOPPs, PCO, IMA, 8-OHdG and PAB were significantly higher than the young control group. T-SH was significantly lower in the elderly control than the young control group. In the elderly HT group, T-SH levels were significantly lower and AOPPs, PCO, IMA, 8-OHdG, and PAB levels were significantly higher than the young HT group.

Conclusion

Protein and DNA cell damage occurs by oxidation of free radicals throughout life. Our study supports the view that these radicals may be responsible for the development of hypertension with aging process. Urine 8-OHdG levels can be used as a marker for oxidative DNA damage in the elderly hypertensive patients. Finally, our results suggest that oxidative stress may influence both the development and progression of hypertension and aging.

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Acknowledgments

This work was supported by The Research Fund of Istanbul University (Project Number 30184).

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Authors and Affiliations

  1. Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey

    Serap Yavuzer & Mahir Cengiz

  2. Division of Geriatrics, Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University, Cerrahpasa, 34303, Istanbul, Turkey

    Hakan Yavuzer, Filiz Demirdag, Alper Doventas & Deniz Suna Erdincler

  3. Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey

    Hayriye Erman & Hafize Uzun

  4. Central Research Laboratory, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey

    Huriye Balci

Authors
  1. Serap Yavuzer
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  2. Hakan Yavuzer
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Corresponding author

Correspondence to Hakan Yavuzer.

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Statement of human and animal rights

The study has been approved by the ethics committee of the Cerrahpasa Medical Faculty.

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Written informed consent was obtained from each subject.

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Yavuzer, S., Yavuzer, H., Cengiz, M. et al. The role of protein oxidation and DNA damage in elderly hypertension. Aging Clin Exp Res 28, 625–632 (2016). https://doi.org/10.1007/s40520-015-0464-7

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  • DOI: https://doi.org/10.1007/s40520-015-0464-7

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