Abstract
Purpose
End-stage renal disease patients on chronic hemodialysis (HD) have a shortened life expectancy compared to the general population. The aim of this study was to evaluate a possible link between three new and emerging factors in renal pathophysiology: Klotho protein, telomere length in peripheral blood mononuclear cells (TL) and redox status parameters before HD (bHD) and after HD (aHD), and to test mortality prediction capability of these emerging parameters in a population of HD patients.
Methods
The study included 130 adult patients with average age 66 (54–72), on HD (3 times per week; 4–5 h per session). Klotho level, TL, routine laboratory parameters, dialysis adequacy and redox status parameters: advanced oxidation protein products (AOPP), prooxidant–antioxidant balance (PAB), superoxide anion (O2.−), malondialdehyde (MDA), ischemia-modified albumin (IMA), total sulfhydryl group content (SHG), and superoxide dismutase (SOD) were determined.
Results
Klotho concentration was significantly higher aHD; 68.2 (22.6–152.9) vs. bHD 64.2 (25.5–119.8) (p = 0.027). The observed increase in TL was not statistically significant. AOPP, PAB, SHG, and SOD activity were significantly increased aHD (p > 0.001). The patients with the highest mortality risk score (MRS) had significantly higher PAB bHD (p = 0.002). Significantly lower O2.− (p < 0.001), SHG content (p = 0.072), and IMA (p = 0.002) aHD were found in patients with the lowest MRS values. Principal component analysis revealed redox balance-Klotho factor as a significant predictor of high mortality risk (p = 0.014).
Conclusion
Decreased Klotho and TL attrition as well as redox status disturbance could be connected with higher mortality rate in HD patients.
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Data availability
The data supporting this study’s findings are available from the corresponding author upon reasonable request.
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Acknowledgements
We are grateful to Dr. David R. Jones for his excellent help in English language correction of the manuscript.
Funding
From the Ministry of Education, Science and Technological Development, Republic of Serbia through Grant Agreement with University of Belgrade—Faculty of Pharmacy No: 451-03-47/2023-01/ 200161. The funding organization played no role in study design, in collection, in analysis and in interpretation of data in the writing the report nor in the decision to submit the report for publication.
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This study has complied with all the relevant national regulations, institutional policies and that listed in the Helsinki Declaration of Ethical Principles for Medical Research. The study was approved by the Ethic Committee of “Zvezdara” University Clinical Hospital Center on 22.01.2021.
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Milošević, T., Sopić, M., Vekić, J. et al. The influence of Klotho protein and prooxidant–antioxidant balance combination on the mortality of HD patients. Int Urol Nephrol 56, 615–623 (2024). https://doi.org/10.1007/s11255-023-03696-w
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DOI: https://doi.org/10.1007/s11255-023-03696-w