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12.02.2024 | Original Article

Exosomal UMOD gene expression and urinary uromodulin level as early noninvasive diagnostic biomarkers for diabetic nephropathy in type 2 diabetic patients

verfasst von: Shaimaa I. Barr, Sahar S. Bessa, Tarek M. Mohamed, Eman M. Abd El-Azeem

Erschienen in: Diabetology International

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Abstract

Background

Diabetic nephropathy (DN) is the leading cause of end-stage renal disease. Exosomes are promising biomarkers for disease diagnosis and uromodulin is a kidney-specific protein. So, this study was designed to investigate the change in the gene expression of urinary exosomal uromodulin mRNA and urinary uromodulin level and determine the diagnostic potential of these noninvasive biomarkers in the early stage of diabetic nephropathy in type 2 diabetic patients.

Method

This study included 100 participants; urinary exosomes were isolated using polyethylene glycol (PEG). Gene expression of exosomal uromodulin mRNA was determined by quantitative real-time polymerase chain reaction (q-RT-PCR). The urinary uromodulin levels were determined by an enzyme-linked immunosorbent assay (ELISA).

Result

In this study, the gene expression of exosomal uromodulin (UMOD) mRNA and the level of urinary uromodulin showed a significant increase in all diabetic groups with and without nephropathy compared to the control group. The exosomal UMOD mRNA showed a significant positive correlation with urinary uromodulin in all groups. Multiple logistic regression showed that urinary uromodulin was an independent determinant for DN. A diagnostic model of two indicators, exosomal UMOD mRNA and urinary uromodulin, can significantly predict DN. The area under the curve is 0.095, with a 95% confidence interval of 0.98–1, and 0.81, with a 95% confidence interval of 0.69–0.92, for the exosomal UMOD mRNA and urinary uromodulin, respectively.

Conclusion

Urinary exosomal mRNA of UMOD and urinary uromodulin levels are progressively elevated in an early stage of DN, even before the microalbuminuria stage, so they could be used as early predictors for DN.

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Titel: Exosomal UMOD gene expression and urinary uromodulin level as early noninvasive diagnostic biomarkers for diabetic nephropathy in type 2 diabetic patients
verfasst von: Shaimaa I. Barr
Sahar S. Bessa
Tarek M. Mohamed
Eman M. Abd El-Azeem
Publikationsdatum: 12.02.2024
Verlag: Springer Nature Singapore
Erschienen in: Diabetology International
Print ISSN: 2190-1678
Elektronische ISSN: 2190-1686
DOI: https://doi.org/10.1007/s13340-023-00686-2

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