Erschienen in:
13.07.2019 | Original article
Dynamic variation of kidney injury molecule-1 mRNA and protein expression in blood and urine of renal transplant recipients: a cohort study
verfasst von:
Sanaz Keshavarz Shahbaz, Fatemeh Pourrezagholi, Mohesn Nafar, Pedram Ahmadpoor, Mehri Barabadi, Farshad Foroughi, Morteza Hosseinzadeh, Mir Saeed Yekaninejad, Aliakbar Amirzargar
Erschienen in:
Clinical and Experimental Nephrology
|
Ausgabe 10/2019
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Abstract
Background
Acute renal dysfunction still constitutes a highly significant obstacle to renal transplantation outcome. Kidney injury molecule-1 is highly upregulated in proximal tubular cells and shed into the urine and blood circulation following kidney injury. The aim of current cohort study was to evaluate the urine KIM-1 (uKIM-1) mRNA expression level and its protein concentration in blood and urine samples to determine whether sequential monitoring of KIM-1 in renal allograft recipients is a reliable biomarker for predicting the clinical status and outcome.
Methods
Both uKIM-1 mRNA expression level and the level of serum and uKIM-1 protein concentration in the 52 renal transplant recipients were respectively quantified using real-time PCR and ELISA methods at 2, 90 and 180 days after transplantation.
Result
KIM-1 mRNA and protein expression level in the blood and urine samples of patients with graft dysfunction was significantly higher than patients with well-functioning graft on days 2, 90 and 180 after transplantation. Receiver-operating characteristic curve analysis of mRNA and protein expression levels showed that urinary and blood KIM-1 at months 3 and 6 could predict acute renal dysfunction at 6 months and 1 year after transplantation.
Conclusion
Sequential monitoring of uKIM-1 mRNA expression level and its protein concentration in the serum and urine samples of renal transplant patients suggests that KIM-1 could be a sensitive and specific biomarker for early diagnosis and prognosis of kidney allograft injury.