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Guo S, Dong Y, Du R, Liu YX, Liu S, Wang Q, Liu JS, Xu H, Jiang YJ, Hao H, Fan LL, Xiang R. Single-cell transcriptomic profiling reveals decreased ER protein Reticulon3 drives the progression of renal fibrosis. MOLECULAR BIOMEDICINE 2024; 5:24. [PMID: 38937317 PMCID: PMC11211315 DOI: 10.1186/s43556-024-00187-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/17/2024] [Indexed: 06/29/2024] Open
Abstract
Chronic kidney disease (CKD) poses a significant global health dilemma, emerging from complex causes. Although our prior research has indicated that a deficiency in Reticulon-3 (RTN3) accelerates renal disease progression, a thorough examination of RTN3 on kidney function and pathology remains underexplored. To address this critical need, we generated Rtn3-null mice to study the consequences of RTN3 protein deficiency on CKD. Single-cell transcriptomic analyses were performed on 47,885 cells from the renal cortex of both healthy and Rtn3-null mice, enabling us to compare spatial architectures and expression profiles across 14 distinct cell types. Our analysis revealed that RTN3 deficiency leads to significant alterations in the spatial organization and gene expression profiles of renal cells, reflecting CKD pathology. Specifically, RTN3 deficiency was associated with Lars2 overexpression, which in turn caused mitochondrial dysfunction and increased reactive oxygen species levels. This shift induced a transition in renal epithelial cells from a functional state to a fibrogenic state, thus promoting renal fibrosis. Additionally, RTN3 deficiency was found to drive the endothelial-to-mesenchymal transition process and disrupt cell-cell communication, further exacerbating renal fibrosis. Immunohistochemistry and Western-Blot techniques were used to validate these observations, reinforcing the critical role of RTN3 in CKD pathogenesis. The deficiency of RTN3 protein in CKD leads to profound changes in cellular architecture and molecular profiles. Our work seeks to elevate the understanding of RTN3's role in CKD's narrative and position it as a promising therapeutic contender.
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Affiliation(s)
- Shuai Guo
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Yi Dong
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Ran Du
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - Yu-Xing Liu
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Shu Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Qin Wang
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Ji-Shi Liu
- Department of Nephrology, The third Xiangya Hospital, Central South University, Changsha, China
- Clinical Research Center For Critical Kidney Disease In Hunan Province, Changsha, China
| | - Hui Xu
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Yu-Jie Jiang
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
- Department of Computer Science, Wake Forest University, Winston-Salem, NC, USA
| | - Huang Hao
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
- Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, China.
| | - Liang-Liang Fan
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China.
| | - Rong Xiang
- Department of Nephrology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.
- Department of Cell Biology, Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China.
- Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha, China.
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Du R, Liu JS, Huang H, Liu YX, Jin JY, Wang CY, Dong Y, Fan LL, Xiang R. RTN3 deficiency exacerbates cisplatin-induced acute kidney injury through the disruption of mitochondrial stability. Mitochondrion 2024; 75:101851. [PMID: 38336146 DOI: 10.1016/j.mito.2024.101851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/17/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Reticulum 3 (RTN3) is an endoplasmic reticulum (ER) protein that has been reported to act in neurodegenerative diseases and lipid metabolism. However, the role of RTN3 in acute kidney injury (AKI) has not been explored. Here, we employed public datasets, patient data, and animal models to explore the role of RTN3 in AKI. The underlying mechanisms were studied in primary renal tubular epithelial cells and in the HK2 cell line. We found reduced expression of RTN3 in AKI patients, cisplatin-induced mice, and cisplatin-treated HK2 cells. RTN3-null mice exhibit more severe AKI symptoms and kidney fibrosis after cisplatin treatment. Mitochondrial dysfunction was also found in cells with RTN3 knockdown or knockout. A mechanistic study revealed that RTN3 can interact with HSPA9 in kidney cells. RTN3 deficiency may disrupt the RTN3-HSPA9-VDAC2 complex and affect MAMs during ER-mitochondrion contact, which further leads to mitochondrial dysfunction and exacerbates cisplatin-induced AKI. Our study indicated that RTN3 was important in the kidney and that a decrease in RTN3 in the kidney might be a risk factor for the aggravation of AKI.
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Affiliation(s)
- Ran Du
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha 410013, China; Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China; Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
| | - Ji-Shi Liu
- Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha 410013, China; Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China; Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China; Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha 410011, China
| | - Hao Huang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China; Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China; Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha 410011, China
| | - Yu-Xing Liu
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Jie-Yuan Jin
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Chen-Yu Wang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Yi Dong
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China
| | - Liang-Liang Fan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China; Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China.
| | - Rong Xiang
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha 410013, China; Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China; Hunan Key Laboratory of Organ Fibrosis, Central South University, Changsha 410011, China.
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Jin J, Chang S, Chen Y, Liu M, Dong Y, Liu J, Wang Q, Huang H, Fan L, Xiang R. Reticulon 3 regulates sphingosine-1-phosphate synthesis in endothelial cells to control blood pressure. MedComm (Beijing) 2024; 5:e480. [PMID: 38352050 PMCID: PMC10863919 DOI: 10.1002/mco2.480] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 01/07/2024] [Accepted: 01/09/2024] [Indexed: 02/16/2024] Open
Abstract
The discovery of the endothelium as a major regulator of vascular tone triggered intense research among basic and clinical investigators to unravel the physiologic and pathophysiologic significance of this phenomenon. Sphingosine-l-phosphate (S1P), derived from the vascular endothelium, is a significant regulator of blood pressure. However, the mechanisms underlying the regulation of S1P biosynthetic pathways in arteries remain to be further clarified. Here, we reported that Reticulon 3 (RTN3) regulated endothelial sphingolipid biosynthesis and blood pressure. We employed public datasets, patients, and mouse models to explore the pathophysiological roles of RTN3 in blood pressure control. The underlying mechanisms were studied in human umbilical vein endothelial cells (HUVECs). We reported that increased RTN3 was found in patients and that RTN3-null mice presented hypotension. In HUVECs, RTN3 can regulate migration and tube formation via the S1P signaling pathway. Mechanistically, RTN3 can interact with CERS2 to promote the selective autophagy of CERS2 and further influence S1P signals to control blood pressure. We also identified an RTN3 variant (c.116C>T, p.T39M) in a family with hypertension. Our data provided the first evidence of the association between RTN3 level changes and blood pressure anomalies and preliminarily elucidated the importance of RTN3 in S1P metabolism and blood pressure regulation.
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Affiliation(s)
- Jie‐Yuan Jin
- Department of OrthopaedicsMicrosurgery & Reconstruction Research CenterXiangya HospitalCentral South UniversityChangshaChina
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya Hospital, Central South UniversityChangshaChina
| | - Si‐Hua Chang
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
| | - Ya‐Qin Chen
- Department of CardiologyThe Second Xiangya Hospital of Central South UniversityChangshaChina
| | - Meng‐Wei Liu
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
- College of Basic MedicalXinjiang Medical UniversityUrumqiChina
| | - Yi Dong
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
| | - Ji‐Shi Liu
- Department of NephrologyThe Third Xiangya Hospital of Central South UniversityChangshaChina
| | - Qin Wang
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya Hospital, Central South UniversityChangshaChina
| | - Hao Huang
- Department of OrthopaedicsMicrosurgery & Reconstruction Research CenterXiangya HospitalCentral South UniversityChangshaChina
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya Hospital, Central South UniversityChangshaChina
| | - Liang‐Liang Fan
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
| | - Rong Xiang
- Department of Cell Biology, School of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya Hospital, Central South UniversityChangshaChina
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Li J, Li L, Zhang Z, Chen P, Shu H, Yang C, Chu Y, Liu J. Ferroptosis: an important player in the inflammatory response in diabetic nephropathy. Front Immunol 2023; 14:1294317. [PMID: 38111578 PMCID: PMC10725962 DOI: 10.3389/fimmu.2023.1294317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/15/2023] [Indexed: 12/20/2023] Open
Abstract
Diabetic nephropathy (DN) is a chronic inflammatory disease that affects millions of diabetic patients worldwide. The key to treating of DN is early diagnosis and prevention. Once the patient enters the clinical proteinuria stage, renal damage is difficult to reverse. Therefore, developing early treatment methods is critical. DN pathogenesis results from various factors, among which the immune response and inflammation play major roles. Ferroptosis is a newly discovered type of programmed cell death characterized by iron-dependent lipid peroxidation and excessive ROS production. Recent studies have demonstrated that inflammation activation is closely related to the occurrence and development of ferroptosis. Moreover, hyperglycemia induces iron overload, lipid peroxidation, oxidative stress, inflammation, and renal fibrosis, all of which are related to DN pathogenesis, indicating that ferroptosis plays a key role in the development of DN. Therefore, this review focuses on the regulatory mechanisms of ferroptosis, and the mutual regulatory processes involved in the occurrence and development of DN and inflammation. By discussing and analyzing the relationship between ferroptosis and inflammation in the occurrence and development of DN, we can deepen our understanding of DN pathogenesis and develop new therapeutics targeting ferroptosis or inflammation-related regulatory mechanisms for patients with DN.
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Affiliation(s)
- Jialing Li
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Luxin Li
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical University, Mudanjiang, China
| | - Zhen Zhang
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical University, Mudanjiang, China
- School of First Clinical Medical College, Mudanjiang Medical University, Mudanjiang, China
| | - Peijian Chen
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical University, Mudanjiang, China
| | - Haiying Shu
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Can Yang
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
| | - Yanhui Chu
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical University, Mudanjiang, China
| | - Jieting Liu
- College of Life Sciences, Mudanjiang Medical University, Mudanjiang, China
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical University, Mudanjiang, China
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Huang H, Guo S, Chen Y, Liu Y, Jin J, Liang Y, Fan L, Xiang R. Increased RTN3 phenocopies nonalcoholic fatty liver disease by inhibiting the AMPK-IDH2 pathway. MedComm (Beijing) 2023; 4:e226. [PMID: 36925557 PMCID: PMC10013133 DOI: 10.1002/mco2.226] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 01/28/2023] [Accepted: 02/01/2023] [Indexed: 03/16/2023] Open
Abstract
Reticulon 3 (RTN3), an endoplasmic reticulum protein, is crucial in neurodegenerative and kidney diseases. However, the role of RTN3 in liver tissues has not been described. Here, we employed public datasets, patients, and several animal models to explore the role of RTN3 in nonalcoholic fatty liver disease (NAFLD). The underlying mechanisms were studied in primary hepatocytes and L02 cells in vitro. We found an increased expression of RTN3 in NAFLD patients, high-fat diet mice, and oxidized low-density lipoprotein-treated L02 cells. The RTN3 transgenic mice exhibited the phenotypes of fatty liver and lipid accumulation. Single-cell RNA sequencing analysis indicated that increased RTN3 might induce mitochondrial dysfunction. We further showed this in primary hepatocytes, the L02 cell line, and the Caenorhabditis elegans strain. Mechanistically, RTN3 regulated these events through its interactions with glucose-regulated protein 78 (GRP78), which further inhibited the adenosine 5 monophosphate-activated protein kinase (AMPK)-isocitrate dehydrogenase 2 (IDH2) pathway. In the end, knockout of RTN3 relieved fatty liver and mitochondrial dysfunction. Our study indicated that RTN3 was important in NAFLD and lipid catabolism and that an increase in RTN3 in the liver might be a risk factor for nonalcoholic steatohepatitis and NAFLD.
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Affiliation(s)
- Hao Huang
- Department of NephrologyXiangya HospitalCentral South UniversityChangshaChina
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human DiseasesSchool of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangshaChina
| | - Shuai Guo
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
| | - Ya‐Qin Chen
- Department of CardiologySecond Xiangya HospitalCentral South UniversityChangshaChina
| | - Yu‐Xing Liu
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
| | - Jie‐Yuan Jin
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
| | - Yun Liang
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
| | - Liang‐Liang Fan
- Department of NephrologyXiangya HospitalCentral South UniversityChangshaChina
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human DiseasesSchool of Life SciencesCentral South UniversityChangshaChina
| | - Rong Xiang
- Department of NephrologyXiangya HospitalCentral South UniversityChangshaChina
- Department of Cell BiologySchool of Life SciencesCentral South UniversityChangshaChina
- Hunan Key Laboratory of Animal Models for Human DiseasesSchool of Life SciencesCentral South UniversityChangshaChina
- National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangshaChina
- Department of CardiologySecond Xiangya HospitalCentral South UniversityChangshaChina
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6
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Lohia S, Latosinska A, Zoidakis J, Makridakis M, Mischak H, Glorieux G, Vlahou A, Jankowski V. Glycosylation Analysis of Urinary Peptidome Highlights IGF2 Glycopeptides in Association with CKD. Int J Mol Sci 2023; 24:ijms24065402. [PMID: 36982475 PMCID: PMC10048973 DOI: 10.3390/ijms24065402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/26/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023] Open
Abstract
Chronic kidney disease (CKD) is prevalent in 10% of world’s adult population. The role of protein glycosylation in causal mechanisms of CKD progression is largely unknown. The aim of this study was to identify urinary O-linked glycopeptides in association to CKD for better characterization of CKD molecular manifestations. Urine samples from eight CKD and two healthy subjects were analyzed by CE-MS/MS and glycopeptides were identified by a specific software followed by manual inspection of the spectra. Distribution of the identified glycopeptides and their correlation with Age, eGFR and Albuminuria were evaluated in 3810 existing datasets. In total, 17 O-linked glycopeptides from 7 different proteins were identified, derived primarily from Insulin-like growth factor-II (IGF2). Glycosylation occurred at the surface exposed IGF2 Threonine 96 position. Three glycopeptides (DVStPPTVLPDNFPRYPVGKF, DVStPPTVLPDNFPRYPVG and DVStPPTVLPDNFPRYP) exhibited positive correlation with Age. The IGF2 glycopeptide (tPPTVLPDNFPRYP) showed a strong negative association with eGFR. These results suggest that with aging and deteriorating kidney function, alterations in IGF2 proteoforms take place, which may reflect changes in mature IGF2 protein. Further experiments corroborated this hypothesis as IGF2 increased plasma levels were observed in CKD patients. Protease predictions, considering also available transcriptomics data, suggest activation of cathepsin S with CKD, meriting further investigation.
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Affiliation(s)
- Sonnal Lohia
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
- Institute for Molecular Cardiovascular Research, RWTH Aachen University Hospital, 52074 Aachen, Germany
| | | | - Jerome Zoidakis
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Manousos Makridakis
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | | | - Griet Glorieux
- Department of Internal Medicine and Pediatrics, Nephrology Division, Ghent University Hospital, 9000 Gent, Belgium
| | - Antonia Vlahou
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Vera Jankowski
- Institute for Molecular Cardiovascular Research, RWTH Aachen University Hospital, 52074 Aachen, Germany
- Correspondence: ; Tel.: +49-(0241)-80-80580
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