Published in:
Open Access
01-12-2022 | Acute Kidney Injury | Research
Absence of long-term changes in urine biomarkers after AKI: findings from the CRIC study
Authors:
Ian E. McCoy, Jesse Y. Hsu, Joseph V. Bonventre, Chirag R. Parikh, Alan S. Go, Kathleen D. Liu, Ana C. Ricardo, Anand Srivastava, Debbie L. Cohen, Jiang He, Jing Chen, Panduranga S. Rao, Anthony N. Muiru, Chi-yuan Hsu
Published in:
BMC Nephrology
|
Issue 1/2022
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Abstract
Background
Mechanisms by which AKI leads to CKD progression remain unclear. Several urine biomarkers have been identified as independent predictors of progressive CKD. It is unknown whether AKI may result in long-term changes in these urine biomarkers, which may mediate the effect of AKI on CKD progression.
Methods
We selected 198 episodes of hospitalized AKI (defined as peak/nadir inpatient serum creatinine values ≥ 1.5) among adult participants in the Chronic Renal Insufficiency Cohort (CRIC) Study. We matched the best non-AKI hospitalization (unique patients) for each AKI hospitalization using pre-hospitalization characteristics including eGFR and urine protein/creatinine ratio. Biomarkers were measured in banked urine samples collected at annual CRIC study visits.
Results
Urine biomarker measurements occurred a median of 7 months before and 5 months after hospitalization. There were no significant differences in the change in urine biomarker-to-creatinine ratio between the AKI and non-AKI groups: KIM-1/Cr + 9% vs + 7%, MCP-1/Cr + 4% vs + 1%, YKL-40/Cr + 7% vs -20%, EGF/Cr -11% vs -8%, UMOD/Cr -2% vs -7% and albumin/Cr + 17% vs + 13% (all p > 0.05).
Conclusion
In this cohort of adults with CKD, AKI did not associate with long-term changes in urine biomarkers.