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Updated: Feb 4, 2026

Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
[EVALUATION OF CARDIOVASCULAR RISKS WITH THE USE OF MORPHOGENETIC KLOTHO PROTEIN IN PATIENTS WITH CHRONIC RENAL
Insights
Klotho protein levels decrease early in chronic kidney disease (CKD), indicating cardiovascular risk. Angiotensin receptor blockers may help maintain Klotho levels in CKD patients.
Area of Science:
- Nephrology
- Cardiology
- Biochemistry
Background:
- Chronic kidney disease (CKD) is associated with cardiovascular complications.
- Klotho protein is implicated in aging and kidney function.
- Understanding Klotho's role in CKD is crucial for risk assessment.
Purpose of the Study:
- To investigate the significance of Klotho protein across different stages of CKD.
- To evaluate the impact of antihypertensive therapy on serum Klotho levels.
Main Methods:
- Study included 130 patients with stage 5 CKD.
- Measured serum Klotho, PTH, calcium, phosphorus, and blood pressure.
- Utilized ELISA, echocardiography, and vascular imaging techniques.
Main Results:
- Serum Klotho decreased earlier than phosphate and PTH in CKD stages (starting from 3A).
- Low Klotho (<387 pg/ml) predicted myocardial calcification risk (80% sensitivity, 76% specificity).
- Angiotensin receptor blockers (ARB) were associated with higher Klotho levels compared to other antihypertensives or uncontrolled BP.
Conclusions:
- Klotho protein serves as an early diagnostic marker for cardiovascular risk in CKD.
- Reduced Klotho levels were less pronounced with ARB use for hypertension.
- Normal Klotho levels correlate with lower cardiovascular calcification in CKD patients.
The Aim:
of the study was to explore the Klotho protein significance in patients with different stages of chronic kidney disease (CKD) and to assess the influence of antihypertensive therapy on Klotho protein serum levels.
Materials And Methods:
130 patients with stage 5 CKD1 were included in the study. Serum PTH, calcium and phosphorus were measured. ELISA was used to determine serum soluble alpha Klotho. Blood pressure including brachial and central (aortic) pressure was measured in all patients together with pulse wave velocity (using a «Sfigmokor» device); in addition, echocardiography (EchoCG), and X-ray examination of the abdominal aorta by Kauppila method were performed.
Results:
The dynamic study of serum Klotho level showed that it changes with decreasing glomerular filtration rate faster than a rise in phosphate and PTH levels starting from stage 3A of CKD. The two later variables increased at stages 4-5.According to the ROC analysis, the values of serum Klotho below 387 pg /ml suggested enhanced risk of myocardial calcification with 80% sensitivity and 76% specificity. In addition, the highest Klotho serum levels were observed in patients whose target BP values were achieved with angiotensin receptor blockers (ARB) compared to those who used other drugs [р<0,01] or failed to reached target BP levels [p=0,008].
Conclusion:
The study showed the possibility of practical use of Klotho protein as an early diagnostic marker of cardiovascular risk. Reduced serum Klotho was less pronounced in patients who used ARB for correction of high blood pressure. Normal Klotho protein levels in serum have been associated with a lower frequency of heart and vessels calcification in CKD patients.
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