A Novel Urinary Proteomics Classifier for Non-Invasive Evaluation of Interstitial Fibrosis and Tubular Atrophy in Chronic Kidney Disease
| Autor: | Joachim Beige, Emmanouil Mavrogeorgis, Harald D. Rupprecht, Justyna Siwy, Lorenzo Catanese, Kerstin Amann, Harald Mischak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Urinary system Clinical Biochemistry 030232 urology & nephrology Urology Urine Biochemistry Microbiology Article 03 medical and health sciences 0302 clinical medicine Structural Biology Fibrosis Biopsy medicine Renal fibrosis ddc:610 Molecular Biology Kidney medicine.diagnostic_test business.industry fibrosis Area under the curve IFTA biomarkers medicine.disease QR1-502 urine 030104 developmental biology medicine.anatomical_structure peptides business Kidney disease |
| Zdroj: | Proteomes Volume 9 Issue 3 Proteomes, Vol 9, Iss 32, p 32 (2021) |
| ISSN: | 2227-7382 |
| DOI: | 10.3390/proteomes9030032 |
| Popis: | Non-invasive urinary peptide biomarkers are able to detect and predict chronic kidney disease (CKD). Moreover, specific urinary peptides enable discrimination of different CKD etiologies and offer an interesting alternative to invasive kidney biopsy, which cannot always be performed. The aim of this study was to define a urinary peptide classifier using mass spectrometry technology to predict the degree of renal interstitial fibrosis and tubular atrophy (IFTA) in CKD patients. The urinary peptide profiles of 435 patients enrolled in this study were analyzed using capillary electrophoresis coupled with mass spectrometry (CE-MS). Urine samples were collected on the day of the diagnostic kidney biopsy. The proteomics data were divided into a training (n = 200) and a test (n = 235) cohort. The fibrosis group was defined as IFTA ≥ 15% and no fibrosis as IFTA < 10%. Statistical comparison of the mass spectrometry data enabled identification of 29 urinary peptides with differential occurrence in samples with and without fibrosis. Several collagen fragments and peptide fragments of fetuin-A and others were combined into a peptidomic classifier. The classifier separated fibrosis from non-fibrosis patients in an independent test set (n = 186) with area under the curve (AUC) of 0.84 (95% CI: 0.779 to 0.889). A significant correlation of IFTA and FPP_BH29 scores could be observed Rho = 0.5, p < 0.0001. We identified a peptidomic classifier for renal fibrosis containing 29 peptide fragments corresponding to 13 different proteins. Urinary proteomics analysis can serve as a non-invasive tool to evaluate the degree of renal fibrosis, in contrast to kidney biopsy, which allows repeated measurements during the disease course. |
| Databáze: | OpenAIRE |
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