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Steinbrenner, Inga; Sekula, Peggy; Kotsis, Fruzsina; von Cube, Maja; Cheng, Yurong; Nadal, Jennifer; Schmid, Matthias; Schneider, Markus P; Krane, Vera; Nauck, Matthias; Eckardt, Kai-Uwe; Schultheiss, Ulla T
Nephrology, dialysis, transplantation, 05/2023, Letnik: 38, Številka: 6Journal Article
ABSTRACT Background Osteopontin (OPN), synthesized in the thick ascending limb of Henle's loop and in the distal tubule, is involved in the pathogenesis of kidney fibrosis, a hallmark of kidney failure (KF). In a cohort of chronic kidney disease (CKD) patients, we evaluated OPN's association with kidney markers and KF. Methods OPN was measured from baseline serum samples of German Chronic Kidney Disease study participants. Cross-sectional regression models for estimated glomerular filtration rate (eGFR) and urinary albumin-to-creatinine ratio (UACR) as well as Cox regression models for all-cause mortality and KF were evaluated to estimate the OPN effect. Additionally, the predictive ability of OPN and time-dependent population-attributable fraction were evaluated. Results Over a median follow-up of 6.5 years, 471 KF events and 629 deaths occurred among 4950 CKD patients. One-unit higher log(OPN) was associated with 5.5 mL/min/1.73 m2 lower eGFR 95% confidence interval (95% CI) –6.4 to –4.6 and 1% change in OPN with 0.7% higher UACR (estimated effect 0.7, 95% CI 0.6–0.8). Moreover, higher OPN levels were associated with a higher risk of KF hazard ratio (HR) 1.4, 95% CI 1.2–1.7 and all-cause mortality (HR 1.5, 95% CI 1.3–1.8). After 6 years, 31% of the KF events could be attributed to higher OPN levels (95% CI 3%–56%). Conclusions In this study, higher OPN levels were associated with kidney function markers worsening and a higher risk for adverse outcomes. A larger proportion of KF could be attributed to higher OPN levels, warranting further research on OPN with regards to its role in CKD progression and possible treatment options.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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