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Wang Q, Zou B, Wei X, Lin H, Pang C, Wang L, Zhong J, Chen H, Gao X, Li M, Ong ACM, Yue Z, Sun L. Identification of renal cyst cells of type I Nephronophthisis by single-nucleus RNA sequencing. Front Cell Dev Biol 2023; 11:1192935. [PMID: 37583898 PMCID: PMC10423821 DOI: 10.3389/fcell.2023.1192935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/20/2023] [Indexed: 08/17/2023] Open
Abstract
Background: Nephronophthisis (NPH) is the most common genetic cause of end-stage renal disease (ESRD) in childhood, and NPHP1 is the major pathogenic gene. Cyst formation at the corticomedullary junction is a pathological feature of NPH, but the mechanism underlying cystogenesis is not well understood. The isolation and identification of cystic cell subpopulation could help to identify their origins and provide vital clues to the mechanisms underlying cystogenesis in NPH. Methods: Single-nucleus RNA sequencing (snRNA-seq) was performed to produce an atlas of NPHP1 renal cells. Kidney samples were collected from WT (Nphp1 +/+) mice and NPHP1 (Nphp1 del2-20/del2-20) model mice. Results: A comprehensive atlas of the renal cellular landscape in NPHP1 was generated, consisting of 14 basic renal cell types as well as a subpopulation of DCT cells that was overrepresented in NPHP1 kidneys compared to WT kidneys. GO analysis revealed significant downregulation of genes associated with tubular development and kidney morphogenesis in this subpopulation. Furthermore, the reconstruction of differentiation trajectories of individual cells within this subpopulation confirmed that a specific group of cells in NPHP1 mice become arrested at an early stage of differentiation and proliferate to form cysts. We demonstrate that Niban1 is a specific molecular marker of cystic cells in both mice and human NPHP1. Conclusion: In summary, we report a novel subpopulation of DCT cells, marked by Niban1, that are classified as cystic cells in the NPHP1 mice kidney. These results offer fresh insights into the cellular and molecular basis of cystogenesis in NPH.
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Affiliation(s)
- Qianying Wang
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Baojuan Zou
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoya Wei
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hongrong Lin
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Changmiao Pang
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Lei Wang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jinglin Zhong
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Huamu Chen
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xuefei Gao
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Min Li
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Albert C. M. Ong
- Kidney Genetics Group, Academic Nephrology Unit, Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield Medical School, Sheffield, United Kingdom
| | - Zhihui Yue
- Department of Pediatrics, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liangzhong Sun
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
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Torres-Arévalo Á, Nahuelpán Y, Muñoz K, Jara C, Cappelli C, Taracha-Wiśniewska A, Quezada-Monrás C, Martín RS. A2BAR Antagonism Decreases the Glomerular Expression and Secretion of Chemoattractants for Monocytes and the Pro-Fibrotic M2 Macrophages Polarization during Diabetic Nephropathy. Int J Mol Sci 2023; 24:10829. [PMID: 37446007 DOI: 10.3390/ijms241310829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/08/2023] [Accepted: 06/14/2023] [Indexed: 07/15/2023] Open
Abstract
Some chemoattractants and leukocytes such as M1 and M2 macrophages are known to be involved in the development of glomerulosclerosis during diabetic nephropathy (DN). In the course of diabetes, an altered and defective cellular metabolism leads to the increase in adenosine levels, and thus to changes in the polarity (M1/M2) of macrophages. MRS1754, a selective antagonist of the A2B adenosine receptor (A2BAR), attenuated glomerulosclerosis and decreased macrophage-myofibroblast transition in DN rats. Therefore, we aimed to investigate the effect of MRS1754 on the glomerular expression/secretion of chemoattractants, the intraglomerular infiltration of leukocytes, and macrophage polarity in DN rats. Kidneys/glomeruli of non-diabetic, DN, and MRS1754-treated DN rats were processed for transcriptomic analysis, immunohistopathology, ELISA, and in vitro macrophage migration assays. The transcriptomic analysis identified an upregulation of transcripts and pathways related to the immune system in the glomeruli of DN rats, which was attenuated using MRS1754. The antagonism of the A2BAR decreased glomerular expression/secretion of chemoattractants (CCL2, CCL3, CCL6, and CCL21), the infiltration of macrophages, and their polarization to M2 in DN rats. The in vitro macrophages migration induced by conditioned-medium of DN glomeruli was significantly decreased using neutralizing antibodies against CCL2, CCL3, and CCL21. We concluded that the pharmacological blockade of the A2BAR decreases the transcriptional expression of genes/pathways related to the immune response, protein expression/secretion of chemoattractants, as well as the infiltration of macrophages and their polarization toward the M2 phenotype in the glomeruli of DN rats, suggesting a new mechanism implicated in the antifibrotic effect of MRS1754.
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Affiliation(s)
- Ángelo Torres-Arévalo
- Escuela de Medicina Veterinaria, Facultad de Medicina Veterinaria Y Recursos Naturales, Sede Talca, Universidad Santo Tomás, Talca 347-3620, Chile
| | - Yéssica Nahuelpán
- Laboratorio de Patología Molecular, Instituto de Bioquímica Y Microbiología, Universidad Austral de Chile, Valdivia 511-0566, Chile
| | - Katherin Muñoz
- Laboratorio de Patología Molecular, Instituto de Bioquímica Y Microbiología, Universidad Austral de Chile, Valdivia 511-0566, Chile
| | - Claudia Jara
- Laboratorio de Patología Molecular, Instituto de Bioquímica Y Microbiología, Universidad Austral de Chile, Valdivia 511-0566, Chile
| | - Claudio Cappelli
- Laboratorio de Patología Molecular, Instituto de Bioquímica Y Microbiología, Universidad Austral de Chile, Valdivia 511-0566, Chile
| | | | - Claudia Quezada-Monrás
- Tumor Biology Laboratory, Institute of Biochemistry and Microbiology, Faculty of Sciences, Universidad Austral de Chile, Valdivia 511-0566, Chile
- Millennium Institute on Immunology and Immunotherapy, Universidad Austral de Chile, Valdivia 511-0566, Chile
| | - Rody San Martín
- Laboratorio de Patología Molecular, Instituto de Bioquímica Y Microbiología, Universidad Austral de Chile, Valdivia 511-0566, Chile
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Benmerah A, Briseño-Roa L, Annereau JP, Saunier S. Repurposing small molecules for Nephronophthisis and related renal ciliopathies. Kidney Int 2023:S0085-2538(23)00390-3. [PMID: 37244473 DOI: 10.1016/j.kint.2023.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/10/2023] [Accepted: 04/10/2023] [Indexed: 05/29/2023]
Abstract
Nephronophthisis is an autosomal recessive tubulo-interstitial nephropathy, belonging to the ciliopathy disorders, characterized by fibrosis and/or cysts. It is the most common genetic cause of renal failure in children and young adults. Clinically and genetically heterogeneous, it is caused by variants in ciliary genes resulting in either an isolated kidney disease or syndromic forms in association with other manifestations of ciliopathy disorders. No curative treatment is currently available. Over the past two decades, advances in understanding disease mechanisms have identified several dysregulated signaling pathways, some shared with other cystic kidney diseases. Notably, molecules previously developed to target these pathways have shown promising beneficial effects in orthologous mouse models. In addition to these knowledge-based repurposing approaches, unbiased "in cellulo" phenotypic screens of "repurposing" libraries identified small molecules able to rescue the ciliogenesis defects observed in nephronophthisis conditions. Those compounds appeared to act on relevant pathways and, when tested, showed beneficial nephronophthisis-associated kidney and/or extra-renal defects in mice. In this review, we have summarized those studies which highlight the drug repurposing strategies in the context of a rare disorders such as nephronophthisis-related ciliopathies, with broad genetic heterogeneity and systemic manifestations but with shared disease mechanisms.
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Affiliation(s)
- Alexandre Benmerah
- Laboratory of Hereditary Kidney Diseases, Imagine Institute, Université Paris Cité, INSERM UMR 1163, 75015 Paris, France
| | | | | | - Sophie Saunier
- Laboratory of Hereditary Kidney Diseases, Imagine Institute, Université Paris Cité, INSERM UMR 1163, 75015 Paris, France.
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Primary cilia and their effects on immune cell functions and metabolism: a model. Trends Immunol 2022; 43:366-378. [DOI: 10.1016/j.it.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 11/21/2022]
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