Endothelial Endothelin Receptor A Expression Is Associated With Podocyte Injury and Oxidative Stress in Patients With Focal Segmental Glomerulosclerosis
| Autor: | Marion Scharpfenecker, Aimée E. Bakker, Malu Zandbergen, Sharon A.C. Heemskerk, Kyra L. Dijkstra, Nina A. van de Lest, Ron Wolterbeek, Jan A. Bruijn |
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| Rok vydání: | 2021 |
| Předmět: |
Cell type
Pathology medicine.medical_specialty Endothelium 030232 urology & nephrology 030204 cardiovascular system & hematology urologic and male genital diseases medicine.disease_cause crosstalk Podocyte Nephrin Lesion endothelin receptor A 03 medical and health sciences 0302 clinical medicine Focal segmental glomerulosclerosis glomerular endothelial cells Translational Research medicine oxidative stress focal segmental glomerulosclerosis biology urogenital system business.industry medicine.disease female genital diseases and pregnancy complications podocytes medicine.anatomical_structure Nephrology biology.protein medicine.symptom Endothelin receptor business Oxidative stress |
| Zdroj: | Kidney International Reports |
| ISSN: | 2468-0249 |
| DOI: | 10.1016/j.ekir.2021.04.013 |
| Popis: | Introduction The podocyte is thought to be the mainly affected cell type in focal segmental glomerulosclerosis (FSGS). However, recent studies have also indicated a role for glomerular endothelial cells and podocyte−endothelial crosstalk in FSGS development. An experimental model for podocyte injury showed that increased endothelin-1 (ET-1) signaling between podocytes and endothelial cells induces endothelial oxidative stress and subsequent podocyte loss. In the current study, we investigated endothelial endothelin receptor A (ETAR) expression in patients with FSGS and its association with podocyte injury and glomerular oxidative stress. Methods We selected 39 biopsy samples of patients with FSGS and 8 healthy control subjects, and stained them for ETAR, nephrin and 8-oxo-guanine, a DNA lesion caused by oxidative damage. Glomeruli with ETAR-positive endothelium and with nephrin loss were scored, and the 8-oxo-guanine−positive glomerular area was measured. Results The mean percentage of glomeruli with ETAR-positive endothelial cells in patients with FSGS was higher compared to that in healthy control subjects (52% vs. 7%; P < 0.001). The presence of glomerular ETAR-positive endothelium was strongly associated with nephrin loss both on the biopsy level (rho = 0.47; P < 0.01), as on the level of individual glomeruli (odds ratio = 2.0; P < 0.001). Moreover, glomeruli with ETAR-positive endothelium showed more 8-oxo-guanine−positive staining (1.9% vs. 2.4%; P = 0.037). Finally, 8-oxo-guanine positivity in glomeruli was associated with increased levels of proteinuria. Conclusion Taking together our findings, we show that ETAR is increased in glomerular endothelial cells of patients with FSGS and associated with podocyte damage and glomerular oxidative stress. These findings support the hypothesis that ET-1 signaling in glomerular endothelial cells contributes to disease development in patients with FSGS. Graphical abstract |
| Databáze: | OpenAIRE |
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