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Aksoy GK, Koyun M, Çomak E, Akman S. Severe anemia and massive proteinuria in a boy with diabetes mellitus: Answers. Pediatr Nephrol 2023; 38:2997-2999. [PMID: 37084136 DOI: 10.1007/s00467-023-05972-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 04/22/2023]
Affiliation(s)
- Gülşah Kaya Aksoy
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey.
| | - Mustafa Koyun
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
| | - Elif Çomak
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
| | - Sema Akman
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
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Aksoy GK, Koyun M, Çomak E, Akman S. Severe anemia and massive proteinuria in a boy with diabetes mellitus: Questions. Pediatr Nephrol 2023; 38:2995-2996. [PMID: 37084135 DOI: 10.1007/s00467-023-05970-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 04/22/2023]
Affiliation(s)
- Gülşah Kaya Aksoy
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey.
| | - Mustafa Koyun
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
| | - Elif Çomak
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
| | - Sema Akman
- Department of Pediatric Nephrology, Faculty of Medicine, Akdeniz University, Antalya, 07100, Turkey
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Beaudoin L, Puyol I, Robledo NL, Balestracci A. A 16-month-old boy with nephrotic syndrome of apparent idiopathic origin: Question. Pediatr Nephrol 2023; 38:105-6. [PMID: 35695957 DOI: 10.1007/s00467-022-05574-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 01/10/2023]
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Yoshibayashi M, Kume S, Yasuda-Yamahara M, Yamahara K, Takeda N, Osawa N, Chin-Kanasaki M, Nakae Y, Yokoi H, Mukoyama M, Asanuma K, Maegawa H, Araki SI. Protective role of podocyte autophagy against glomerular endothelial dysfunction in diabetes. Biochem Biophys Res Commun 2020; 525:319-325. [PMID: 32089264 DOI: 10.1016/j.bbrc.2020.02.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 02/11/2020] [Indexed: 02/07/2023]
Abstract
To examine the cell-protective role of podocyte autophagy against glomerular endothelial dysfunction in diabetes, we analyzed the renal phenotype of tamoxifen (TM)-inducible podocyte-specific Atg5-deficient (iPodo-Atg5-/-) mice with experimental endothelial dysfunction. In both control and iPodo-Atg5-/- mice, high fat diet (HFD) feeding induced glomerular endothelial damage characterized by decreased urinary nitric oxide (NO) excretion, collapsed endothelial fenestrae, and reduced endothelial glycocalyx. HFD-fed control mice showed slight albuminuria and nearly normal podocyte morphology. In contrast, HFD-fed iPodo-Atg5-/- mice developed massive albuminuria accompanied by severe podocyte injury that was observed predominantly in podocytes adjacent to damaged endothelial cells by scanning electron microscopy. Although podocyte-specific autophagy deficiency did not affect endothelial NO synthase deficiency-associated albuminuria, it markedly exacerbated albuminuria and severe podocyte morphological damage when the damage was induced by intravenous neuraminidase injection to remove glycocalyx from the endothelial surface. Furthermore, endoplasmic reticulum stress was accelerated in podocytes of iPodo-Atg5-/- mice stimulated with neuraminidase, and treatment with molecular chaperone tauroursodeoxycholic acid improved neuraminidase-induced severe albuminuria and podocyte injury. In conclusion, podocyte autophagy plays a renoprotective role against diabetes-related structural endothelial damage, providing an additional insight into the pathogenesis of massive proteinuria in diabetic nephropathy.
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Affiliation(s)
- Mamoru Yoshibayashi
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Shinji Kume
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan.
| | | | - Kosuke Yamahara
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Naoko Takeda
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Norihisa Osawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | | | - Yuki Nakae
- Departments of Stem Cell Biology and Regenerative Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Hideki Yokoi
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masashi Mukoyama
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Katsuhiko Asanuma
- Department of Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroshi Maegawa
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Shin-Ichi Araki
- Department of Medicine, Shiga University of Medical Science, Otsu, Shiga, Japan.
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