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Zhou L, Deng Z, Wang Y, Zhang H, Yan S, Kanwar YS, Wang Y, Dai Y, Deng F. PRMT4 interacts with NCOA4 to inhibit ferritinophagy in cisplatin-induced acute kidney injury. FASEB J 2024; 38:e23584. [PMID: 38568836 DOI: 10.1096/fj.202302596r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/04/2024] [Accepted: 03/18/2024] [Indexed: 04/05/2024]
Abstract
Cisplatin-induced acute kidney injury (AKI) is commonly seen in the clinical practice, and ferroptosis, a type of non-apoptotic cell death, plays a pivotal role in it. Previous studies suggested that protein arginine methyltransferase 4 (PRMT4) was incorporated in various bioprocesses, but its role in renal injuries has not been investigated. Our present study showed that PRMT4 was highly expressed in renal proximal tubular cells, and it was downregulated in cisplatin-induced AKI. Besides, genetic disruption of PRMT4 exacerbated, while its overexpression attenuated, cisplatin-induced redox injuries in renal proximal epithelia. Mechanistically, our work showed that PRMT4 interacted with NCOA4 to inhibit ferritinophagy, a type of selective autophagy favoring lipid peroxidation to accelerate ferroptosis. Taken together, our study demonstrated that PRMT4 interacted with NCOA4 to attenuate ferroptosis in cisplatin-induced AKI, suggesting that PRMT4 might present as a new therapeutic target for cisplatin-related nephropathy.
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Affiliation(s)
- Lizhi Zhou
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
| | - Zebin Deng
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
| | - Yilong Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Hao Zhang
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
| | - Shu Yan
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yashpal S Kanwar
- Departments of Pathology & Medicine, Northwestern University, Chicago, Illinois, USA
| | - Yinhuai Wang
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yingbo Dai
- Department of Urology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Fei Deng
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Kidney Disease and Blood Purification, Changsha, China
- Department of Nephrology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, China
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Chen Y, Kanwar YS, Chen X, Zhan M. Aging and Diabetic Kidney Disease: Emerging Pathogenetic Mechanisms and Clinical Implications. Curr Med Chem 2024; 31:697-725. [PMID: 37345243 DOI: 10.2174/0929867330666230621112215] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 03/29/2023] [Revised: 05/20/2023] [Accepted: 06/01/2023] [Indexed: 06/23/2023]
Abstract
Diabetic kidney disease (DKD) is one of the leading causes of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide. With the overpowering trend of aging, the prevalence of DKD in the elderly is progressively increasing. Genetic factors, abnormal glucose metabolism, inflammation, mitochondrial dysregulation, and oxidative stress all contribute to the development of DKD. Conceivably, during aging, these pathobiological processes are likely to be intensified, and this would further exacerbate the deterioration of renal functions in elderly patients, ultimately leading to ESRD. Currently, the pathogenesis of DKD in the elderly is not very well-understood. This study describes an appraisal of the relationship between diabetic nephropathy and aging while discussing the structural and functional changes in the aged kidney, the impact of related mechanisms on the outcome of DKD, and the latest advances in targeted therapies.
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Affiliation(s)
- Yi Chen
- School of Medicine, Ningbo University, Ningbo, 315000, China
| | - Yashpal S Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, 60611, US
| | - Xueqin Chen
- Department of Medicine, The First Affiliated Hospital, Ningbo University, Ningbo, 315000, China
- Department of Medicine, Ningbo First Hospital, Zhejiang University, Ningbo, 315000, China
| | - Ming Zhan
- Department of Medicine, The First Affiliated Hospital, Ningbo University, Ningbo, 315000, China
- Department of Medicine, Ningbo First Hospital, Zhejiang University, Ningbo, 315000, China
- China Health Institute, University of Nottingham Ningbo China, Ningbo, 315100, China
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Kidokoro K, Kadoya H, Cherney DZI, Kondo M, Wada Y, Umeno R, Kishi S, Nagasu H, Nagai K, Suzuki T, Sasaki T, Yamamoto M, Kanwar YS, Kashihara N. Insights into the Regulation of GFR by the Keap1-Nrf2 Pathway. Kidney360 2023; 4:1454-1466. [PMID: 37265366 PMCID: PMC10615375 DOI: 10.34067/kid.0000000000000171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 05/11/2023] [Indexed: 06/03/2023]
Abstract
Key Points Kelch-like erythroid cell-derived protein with CNC homology (ECH)-associated protein 1-NF (erythroid-derived 2)–like 2 pathway increases GFR without an appreciable increase in intraglomerular pressure. Kelch-like ECH-associated protein 1-NF (erythroid-derived 2)–like 2 pathway regulates GFR through changes in filtration area by modulating calcium dynamics and contractility in glomerular cells. Background Literature data suggest that the activation of the Kelch-like ECH-associated protein 1 (Keap1)-NF (erythroid-derived 2)–like 2 (Nrf2) pathway increases GFR in patients with type 2 diabetes and CKD. However, the mechanisms whereby the Keap1-Nrf2 pathway regulates GFR are unknown. Methods Various renal physiological parameters were assessed in C57BL/6 mice (wild-type), Nrf2 -deficient mice, and Nrf2 -activated Keap1- knockdown mice. In addition, these parameters were assessed after the administration of receptor targeting agent (RTA) dh404 (CDDO‐dhTFEA), an Nrf2 activator. Results Pharmacologic and genetic Keap1 -Nrf2 activation increased renal blood flow (P < 0.05), glomerular volume (P < 0.05), and GFR (P < 0.05) but did not alter the afferent-to-efferent arteriolar diameter ratio or glomerular permeability. Calcium influx into the podocytes through transient receptor potential canonical (TRPC) channels in response to H2O2 was suppressed by Keap1-Nrf2 activation and TRPCs inhibition. Treatment with a TRPC6 and TRPC5 inhibitors increased single-nephron GFR in wild-type mice. Conclusions In conclusion, the Keap1-Nrf2 pathway regulates GFR through changes in ultrafiltration by modulating redox-sensitive intracellular calcium signaling and cellular contractility, mediated through TRPC activity, in glomerular cells, particularly the podocytes.
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Affiliation(s)
- Kengo Kidokoro
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Hiroyuki Kadoya
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - David Z. I. Cherney
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Megumi Kondo
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Yoshihisa Wada
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Reina Umeno
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Seiji Kishi
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Hajime Nagasu
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Kojiro Nagai
- Department of Nephrology, Shizuoka Geniral Hospital, Shizuoka, Japan
| | - Takafumi Suzuki
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tamaki Sasaki
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Naoki Kashihara
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Japan
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Li L, Long J, Mise K, Poungavrin N, Lorenzi PL, Mahmud I, Tan L, Saha PK, Kanwar YS, Chang BH, Danesh FR. The transcription factor ChREBP links mitochondrial lipidomes to mitochondrial morphology and progression of diabetic kidney disease. J Biol Chem 2023; 299:105185. [PMID: 37611830 PMCID: PMC10506103 DOI: 10.1016/j.jbc.2023.105185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 07/27/2023] [Accepted: 08/09/2023] [Indexed: 08/25/2023] Open
Abstract
A substantial body of evidence has established the contributions of both mitochondrial dynamics and lipid metabolism to the pathogenesis of diabetic kidney disease (DKD). However, the precise interplay between these two key metabolic regulators of DKD is not fully understood. Here, we uncover a link between mitochondrial dynamics and lipid metabolism by investigating the role of carbohydrate-response element-binding protein (ChREBP), a glucose-responsive transcription factor and a master regulator of lipogenesis, in kidney podocytes. We find that inducible podocyte-specific knockdown of ChREBP in diabetic db/db mice improves key biochemical and histological features of DKD in addition to significantly reducing mitochondrial fragmentation. Because of the critical role of ChREBP in lipid metabolism, we interrogated whether and how mitochondrial lipidomes play a role in ChREBP-mediated mitochondrial fission. Our findings suggest a key role for a family of ether phospholipids in ChREBP-induced mitochondrial remodeling. We find that overexpression of glyceronephosphate O-acyltransferase, a critical enzyme in the biosynthesis of plasmalogens, reverses the protective phenotype of ChREBP deficiency on mitochondrial fragmentation. Finally, our data also points to Gnpat as a direct transcriptional target of ChREBP. Taken together, our results uncover a distinct mitochondrial lipid signature as the link between ChREBP-induced mitochondrial dynamics and progression of DKD.
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Affiliation(s)
- Li Li
- Section of Nephrology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA; Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jianyin Long
- Section of Nephrology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Koki Mise
- Section of Nephrology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA; Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Naravat Poungavrin
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Philip L Lorenzi
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Iqbal Mahmud
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Lin Tan
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Pradip K Saha
- Division of Diabetes, Endocrinology & Metabolism, Department of Medicine, Diabetes Research Center, Baylor College of Medicine, Houston, Texas, USA
| | - Yashpal S Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Benny H Chang
- Section of Nephrology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Farhad R Danesh
- Section of Nephrology, Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA; Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, Texas, USA.
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Shen Y, Chen Y, Huang S, Yao X, Kanwar YS, Zhan M. The Association between Symptoms of Depression and Anxiety, Quality of Life, and Diabetic Kidney Disease among Chinese Adults: A Cross-Sectional Study. Int J Environ Res Public Health 2022; 20:475. [PMID: 36612797 PMCID: PMC9819882 DOI: 10.3390/ijerph20010475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/23/2022] [Accepted: 12/25/2022] [Indexed: 06/17/2023]
Abstract
Depression and anxiety are common comorbid symptoms among patients with diabetic kidney disease (DKD). Little is known about the influence of poor psychological conditions on the disease progression and quality of life (QOL) in DKD patients. This study aimed to investigate the prevalence of, and risk factors for, depression and anxiety in Chinese DKD patients, and to analyze their impact on the renal function, proteinuria, and QOL. A total of 620 adult patients with Type 2 diabetes and DKD being treated at a tertiary hospital in East China were recruited. Depression and anxiety symptoms were assessed by the Zung Self-Rating Depression Scale and Anxiety Scale. Among the DKD participants, 41.3% had symptoms of depression and 45.0% had anxiety symptoms. A poor education, physical inactivity, stroke, low serum albumin, CKD stage 3-4, macroalbuminuria, and a poor QOL were independent risk factors for depression in the DKD patients. Whereas a higher education, physical inactivity, diabetic retinopathy and neuropathy, low hemoglobin, CKD stage 3-4, and a poor QOL were risk factors for anxiety. Depression and anxiety scores among the DKD patients were negatively correlated with the eGFR and QOL scores. Moreover, depression and anxiety symptoms were independent risk factors for DKD patients with CKD stage 3-4 and a poor QOL. Our findings suggest a high prevalence of depression and anxiety among Chinese DKD patients, and the severity of psychological symptoms is closely linked to the deterioration of renal function and the QOL. The early screening and intervention of psychopathological disorders is thus strongly recommended for improving the QOL and clinical outcomes among DKD patients.
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Affiliation(s)
- Yan Shen
- School of Medicine, Ningbo University, Ningbo 315000, China
| | - Yi Chen
- School of Medicine, Ningbo University, Ningbo 315000, China
| | - Shichun Huang
- School of Medicine, Ningbo University, Ningbo 315000, China
| | - Xuejie Yao
- Department of Medicine, Ningbo First Hospital, Zhejiang University, Ningbo 315000, China
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University, Chicago, IL 60611, USA
- Department of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Ming Zhan
- Department of Medicine, Ningbo First Hospital, Zhejiang University, Ningbo 315000, China
- China Health Institute, University of Nottingham Ningbo China, Ningbo 315100, China
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Sharma I, Liao Y, Zheng X, Kanwar YS. Modulation of gentamicin-induced acute kidney injury by myo-inositol oxygenase via the ROS/ALOX-12/12-HETE/GPR31 signaling pathway. JCI Insight 2022; 7:155487. [PMID: 35315361 PMCID: PMC8986073 DOI: 10.1172/jci.insight.155487] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/09/2022] [Indexed: 12/21/2022] Open
Abstract
In this investigation, a potentially novel signaling pathway in gentamicin-induced acute kidney injury-worsened by overexpression of proximal tubular enzyme, myo-inositol oxygenase (MIOX)-was elucidated. WT, MIOX-transgenic (MIOX-Tg), and MIOX-KO mice were used. Gentamicin was administered to induce tubular injury. MIOX-Tg mice had severe tubular lesions associated with increased serum creatinine and proteinuria. Lesions were relatively mild, with no rise in serum creatinine and no albuminuria in MIOX-KO mice. Transfection of HK-2 cells with MIOX-pcDNA led to increased gentamicin-induced reactive oxygen species (ROS). Marked increase of ROS-mediated lipid hydroperoxidation was noted in MIOX-Tg mice, as assessed by 4-HNE staining. This was associated with increased expression of arachidonate 12-lipoxygenase (ALOX-12) and generation of 12-hydroxyeicosatetraenoic acid (12-HETE). In addition, notable monocyte/macrophage influx, upregulation of NF-κB and inflammatory cytokines, and apoptosis was observed in MIOX-Tg mice. Treatment of cells with ALOX-12 siRNA abolished gentamicin-mediated induction of cytokines and 12-HETE generation. HETE-12 treatment promoted this effect, along with upregulation of various signaling kinases and activation of GPCR31. Similarly, treatment of cells or mice with the ALOX-12 inhibitor ML355 attenuated inflammatory response, kinase signaling cascade, and albuminuria. Collectively, these studies highlight a potentially novel mechanism (i.e., the ROS/ALOX-12/12-HETE/GPR31 signaling axis) relevant to gentamicin-induced nephrotoxicity modulated by MIOX.
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Zheng X, Deng F, Sharma I, Kanwar YS. Myo-inositol oxygenase overexpression exacerbates cadmium-induced kidney injury via oxidant stress and necroptosis. Am J Physiol Renal Physiol 2022; 322:F344-F359. [PMID: 35100813 PMCID: PMC8897016 DOI: 10.1152/ajprenal.00460.2021] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Conceivably, like other forms of acute kidney injury, cadmium-induced renal injury may also be associated with oxidative stress and various forms of cell death, including necroptosis, a form of regulated necrosis-associated cell death. Myo-inositol oxygenase (MIOX), an enzyme localized in renal proximal tubules, regulates oxidative stress and programmed cell death in various forms of renal injuries. Herein, the role and potential mechanism(s) by which MIOX potentiates cadmium-induced renal tubular damage were investigated. Overexpression of MIOX exacerbated cadmium-induced cell death and proximal tubular injury in mice, whereas MIOX gene disruption attenuated cellular damage in vitro and in vivo. Furthermore, necroptosis was observed in the renal tubular compartment, and, more importantly, it was corroborated by inhibitor experiments with necrostatin-1 (Nec-1). Coadministration of Nec-1 dampened including receptor-interacting protein kinase (RIP)1/RIP3/mixed-lineage kinase domain-like signaling, which is relevant to the process of necroptosis. Interestingly, the necroptosis induced by cadmium in tubules was modulated by MIOX expression profile. Also, the increased reactive oxygen species generation and NADPH consumption were accelerated by MIOX overexpression, and they were mitigated by Nec-1 administration. These findings suggest that MIOX-potentiated redox injury and necroptosis are intricately involved in the pathogenesis of cadmium-induced nephropathy, and this may yield novel potential therapeutic targets for amelioration of cadmium-induced kidney injury.NEW & NOTEWORTHY This is a seminal article documenting the role of myo-inositol oxygenase (MIOX), a renal proximal tubule-specific enzyme, in the exacerbation of cadmium-induced acute kidney injury by perturbing redox balance and inducing necroptosis. MIOX gene disruption or administration of necrostatin-1 (a necroptosis inhibitor) diminished cadmium-induced renal damage, in both in vitro and in vivo systems, suggesting a therapeutic potential of MIOX to attenuate necroptosis and relevant signaling pathways in cadmium-induced renal injury.
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Affiliation(s)
- Xiaoping Zheng
- 1Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, People’s Republic of China,2Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois,3Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Fei Deng
- 2Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois,3Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Isha Sharma
- 2Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois,3Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Yashpal S. Kanwar
- 2Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois,3Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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Zhang Y, Gui M, Wang Y, Mani N, Chaudhuri S, Gao B, Li H, Kanwar YS, Lewis SA, Dumas SN, Ntambi. JM, Zhang K, Fang D. Inositol-Requiring Enzyme 1α-Mediated Synthesis of Monounsaturated Fatty Acids as a Driver of B Cell Differentiation and Lupus-like Autoimmune Disease. Arthritis Rheumatol 2021; 73:2314-2326. [PMID: 34105254 PMCID: PMC8651829 DOI: 10.1002/art.41883] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 05/27/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To explore the molecular mechanisms underlying dysregulation of lipid metabolism in the pathogenesis of systemic lupus erythematosus (SLE). METHODS B cells in peripheral blood from patients with SLE and healthy controls were stained with BODIPY dye for detection of lipids. Mice with targeted knockout of genes for B cell-specific inositol-requiring enzyme 1α (IRE-1α) and stearoyl-coenzyme A desaturase 1 (SCD-1) were used for studying the influence of the IRE-1α/SCD-1/SCD-2 pathway on B cell differentiation and autoantibody production. The preclinical efficacy of IRE-1α suppression as a treatment for lupus was tested in MRL.Faslpr mice. RESULTS In cultures with mouse IRE-1α-null B cells, supplementation with monounsaturated fatty acids largely rescued differentiation of plasma cells from B cells, indicating that the compromised capacity of B cell differentiation in the absence of IRE-1α may be attributable to a defect in monounsaturated fatty acid synthesis. Moreover, activation with IRE-1α/X-box binding protein 1 (XBP-1) was required to facilitate B cell expression of SCD-1 and SCD-2, which are 2 critical enzymes that catalyze monounsaturated fatty acid synthesis. Mice with targeted Scd1 gene deletion displayed a phenotype that was similar to that of IRE-1α-deficient mice, with diminished B cell differentiation into plasma cells. Importantly, in B cells from patients with lupus, both IRE-1α expression and Xbp1 messenger RNA splicing were significantly increased, and this was positively correlated with the expression of both Scd1 and Scd2 as well as with the amount of B cell lipid deposition. In MRL.Faslpr mice, both genetic and pharmacologic suppression of IRE-1α protected against the pathologic development and progression of lupus-like autoimmune disease. CONCLUSION The results of this study reveal a molecular link in the dysregulation of lipid metabolism in the pathogenesis of lupus, demonstrating that the IRE-1α/XBP-1 pathway controls plasma cell differentiation through SCD-1/SCD-2-mediated monounsaturated fatty acid synthesis. These findings provide a rationale for targeting IRE-1α and monounsaturated fatty acid synthesis in the treatment of patients with SLE.
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Affiliation(s)
- Yana Zhang
- Department of Otorhinolaryngology-Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Ming Gui
- Department of Rheumatology and Immunology, Third Xiangya Hospital of Central South University, No. 138, Tongzipo Road, Changsha, 410013, China
| | - Yajun Wang
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Nikita Mani
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Shuvam Chaudhuri
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Beixue Gao
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Huabin Li
- Department of Otolaryngology, Head and Neck Surgery, Affiliated Eye, Ear, Nose and Throat Hospital, Fudan University, No. 83, Fenyang Road, Shanghai, 200031, China
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
| | - Sarah A. Lewis
- Department of Biochemistry, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI, 53706, USA
| | - Sabrina N. Dumas
- Department of Nutritional Sciences, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI, 53706, USA
| | - James M. Ntambi.
- Department of Biochemistry, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI, 53706, USA
- Department of Nutritional Sciences, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI, 53706, USA
| | - Kezhong Zhang
- Department of Biochemistry, Microbiology, and Immunology, Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, 303 E. Chicago Ave, Chicago, IL, 60611, USA
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Wang AA, Kanwar YS, Aggarwal V, Srivastava A. AL Amyloidosis Presenting With Crescentic Glomerulonephritis. Kidney Med 2021; 3:644-648. [PMID: 34401730 PMCID: PMC8350831 DOI: 10.1016/j.xkme.2021.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Kidney amyloidosis typically presents with nephrotic-range proteinuria. Rare cases of crescentic glomerulonephritis have been reported in patients with kidney amyloidosis but most cases were in the setting of patients with AA amyloidosis from long-standing inflammation and malignancy. We present a case of a previously healthy man in his 70s who was admitted with severe acute kidney injury, nephrotic-range proteinuria, and nephritic urinary sediment. Initial serologic testing for causes of rapidly progressive glomerulonephritis were negative. Kidney biopsy demonstrated the presence of active cellular and fibrocellular crescents with Congo red-positive staining in glomeruli and microvasculature on light microscopy and amyloid fibrils in glomerular basement membrane on electron microscopy. Urinary protein electrophoresis revealed monoclonal λ light chains, leading to a diagnosis of kidney AL amyloidosis, which was confirmed with bone marrow biopsy. Our case illustrates that AL amyloidosis can present with findings suspicious for rapidly progressive glomerulonephritis and crescent formation on kidney biopsy specimens.
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Affiliation(s)
- Ann A. Wang
- Graduate Medical Education, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Vikram Aggarwal
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Anand Srivastava
- Division of Nephrology and Hypertension, Northwestern University Feinberg School of Medicine, Chicago, IL
- Center for Translational Metabolism and Health, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
- Address for Correspondence: Anand Srivastava, MD, MPH, 633 N St Clair St, Ste 18-083, Chicago, IL 60611.
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Abstract
Incidence of obesity related renal disorders have increased 10-folds in recent years. One of the consequences of obesity is an increased glomerular filtration rate (GFR) that leads to the enlargement of the renal glomerulus, i.e., glomerulomegaly. This heightened hyper-filtration in the setting of type 2 diabetes irreparably damages the kidney and leads to progression of end stage renal disease (ESRD). The patients suffering from type 2 diabetes have progressive proteinuria, and eventually one third of them develop chronic kidney disease (CKD) and ESRD. For ameliorating the progression of CKD, inhibitors of renin angiotensin aldosterone system (RAAS) seemed to be effective, but on a short-term basis only. Long term and stable treatment strategies like weight loss via restricted or hypo-caloric diet or bariatric surgery have yielded better promising results in terms of amelioration of proteinuria and maintenance of normal GFR. Body mass index (BMI) is considered as a traditional marker for the onset of obesity, but apparently, it is not a reliable indicator, and thus there is a need for more precise evaluation of regional fat distribution and amount of muscle mass. With respect to the pathogenesis, recent investigations have suggested perturbation in fatty acid and cholesterol metabolism as the critical mediators in ectopic renal lipid accumulation associated with inflammation, increased generation of ROS, RAAS activation and consequential tubulo-interstitial injury. This review summarizes the renewed approaches for the obesity assessment and evaluation of the pathogenesis of CKD, altered renal hemodynamics and potential therapeutic targets.
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Affiliation(s)
- Isha Sharma
- Departments of Pathology and Medicine, Northwestern University, Chicago, IL, United States
| | - Yingjun Liao
- Departments of Pathology and Medicine, Northwestern University, Chicago, IL, United States.,Department of Nephrology, Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoping Zheng
- Departments of Pathology and Medicine, Northwestern University, Chicago, IL, United States.,Department of Urology, Third Xiangya Hospital, Central South University, Changsha, China
| | - Yashpal S Kanwar
- Departments of Pathology and Medicine, Northwestern University, Chicago, IL, United States
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11
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Deng F, Zheng X, Sharma I, Dai Y, Wang Y, Kanwar YS. Regulated cell death in cisplatin-induced AKI: relevance of myo-inositol metabolism. Am J Physiol Renal Physiol 2021; 320:F578-F595. [PMID: 33615890 PMCID: PMC8083971 DOI: 10.1152/ajprenal.00016.2021] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 12/14/2022] Open
Abstract
Regulated cell death (RCD), distinct from accidental cell death, refers to a process of well-controlled programmed cell death with well-defined pathological mechanisms. In the past few decades, various terms for RCDs were coined, and some of them have been implicated in the pathogenesis of various types of acute kidney injury (AKI). Cisplatin is widely used as a chemotherapeutic drug for a broad spectrum of cancers, but its usage was hampered because of being highly nephrotoxic. Cisplatin-induced AKI is commonly seen clinically, and it also serves as a well-established prototypic model for laboratory investigations relevant to acute nephropathy affecting especially the tubular compartment. Literature reports over a period of three decades have indicated that there are multiple types of RCDs, including apoptosis, necroptosis, pyroptosis, ferroptosis, and mitochondrial permeability transition-mediated necrosis, and some of them are pertinent to the pathogenesis of cisplatin-induced AKI. Interestingly, myo-inositol metabolism, a vital biological process that is largely restricted to the kidney, seems to be relevant to the pathogenesis of certain forms of RCDs. A comprehensive understanding of RCDs in cisplatin-induced AKI and their relevance to myo-inositol homeostasis may yield novel therapeutic targets for the amelioration of cisplatin-related nephropathy.
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Affiliation(s)
- Fei Deng
- Department of Urology, The Second Xiangya Hospital, Central South University, Changsha, China
- Department of Pathology, Northwestern University, Chicago, Illinois
- Department of Medicine, Northwestern University, Chicago, Illinois
| | - Xiaoping Zheng
- Department of Pathology, Northwestern University, Chicago, Illinois
- Department of Medicine, Northwestern University, Chicago, Illinois
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Isha Sharma
- Department of Pathology, Northwestern University, Chicago, Illinois
- Department of Medicine, Northwestern University, Chicago, Illinois
| | - Yingbo Dai
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, China
- Department of Urology, The Fifth Affiliated Hospital of Sun Yet-Sen University, Zhuhai, China
| | - Yinhuai Wang
- Department of Urology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University, Chicago, Illinois
- Department of Medicine, Northwestern University, Chicago, Illinois
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12
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McGee K, Stone NJ, Wadhwani S, Kanwar YS, Villaflor V, Akhter N. A possible mechanism of hyperlipidemia in a patient with metastatic non-small cell lung cancer on lorlatinib therapy. J Oncol Pharm Pract 2021; 27:2010-2013. [PMID: 33789526 DOI: 10.1177/10781552211004698] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION We report the case of a woman who developed hyperlipidemia on lorlatinib therapy found to have minimal change disease. We review therapies for cancer known to alter the lipid profile, in addition to reviewing secondary hyperlipidemia workup. We also propose a mechanism for lorlatinib-induced hyperlipidemia. CASE REPORT A 63 year old woman with non-small cell lung adenocarcinoma on lorlatinib therapy develops marked hyperlipidemia.Management & outcome: A secondary hyperlipidemia workup is performed which reveals nephrotic range proteinuria. Minimal change disease is found on renal biopsy. The hyperlipidemia was initially responsive to statin therapy, then required addition of ezetimibe. DISCUSSION This is a case of hyperlipidemia in a patient on lorlatinib. The case highlights that therapies for lung cancer and other malignancies have the potential to alter the lipid profile. We propose minimal change disease as a possible mechanism for lorlatinib-induced dyslipidemia. Additionally, we discuss the crucial aspects of secondary hyperlipidemia workup.
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Affiliation(s)
- Katherine McGee
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Neil J Stone
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Cardiology, Northwestern University, Chicago, IL, USA
| | - Shikha Wadhwani
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Nephrology and Hypertension, Northwestern University, Chicago, IL, USA
| | - Yashpal S Kanwar
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Nephrology and Hypertension, Northwestern University, Chicago, IL, USA.,Department of Pathology, Northwestern University, Chicago, IL, USA
| | - Victoria Villaflor
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Hematology Oncology, Northwestern University, Chicago, IL, USA
| | - Nausheen Akhter
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Cardiology, Northwestern University, Chicago, IL, USA
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13
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Thatipelli S, Santoiemma P, Echenique IA, Green R, Ison MG, Ladner D, Kanwar YS, Stosor V. Donor-derived renal allograft mucormycosis in a combined liver and kidney transplantation: Case report and review of the literature. Transpl Infect Dis 2020; 23:e13534. [PMID: 33251715 DOI: 10.1111/tid.13534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 09/04/2020] [Revised: 10/13/2020] [Accepted: 11/15/2020] [Indexed: 02/02/2023]
Abstract
Mucormycosis infrequently may present with isolated renal involvement. Among solid organ transplant recipients, renal allograft mucormycosis has been most often associated with medical tourism or transplantation outside of the western world. We report a case of an HIV/HCV co-infected woman who underwent simultaneous liver and kidney transplantation with a Public Health Service increased risk donor organ. 16 days after transplant, she developed massive hematuria and was found to have renal allograft Rhizopus spp. involvement, we surmise to have been from donor-derived infection. Therapy included nephrectomy, debridement, liposomal amphotericin B, and posaconazole with survival. We reviewed PubMed indexed, English-language cases of isolated renal mucormycosis in general, in HIV/AIDS, and from donor-derived renal allograft infections.
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Affiliation(s)
- Sneha Thatipelli
- Department of Internal Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Phillip Santoiemma
- Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Richard Green
- Division of Gastroenterology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Michael G Ison
- Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Northwestern University Transplant Outcomes Research Collaboration, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Daniela Ladner
- Northwestern University Transplant Outcomes Research Collaboration, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Division of Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Valentina Stosor
- Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Northwestern University Transplant Outcomes Research Collaboration, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Division of Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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14
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Marahrens B, Schulze A, Wysocki J, Lin MH, Ye M, Kanwar YS, Bader M, Velez JCQ, Miner JH, Batlle D. Knockout of aminopeptidase A in mice causes functional alterations and morphological glomerular basement membrane changes in the kidneys. Kidney Int 2020; 99:900-913. [PMID: 33316280 DOI: 10.1016/j.kint.2020.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/23/2020] [Revised: 10/28/2020] [Accepted: 11/19/2020] [Indexed: 11/29/2022]
Abstract
Aminopeptidase A is one of the most potent enzymes within the renin-angiotensin system in terms of angiotensin II degradation. Here, we examined whether there is a kidney phenotype and any compensatory changes in other renin angiotensin system enzymes involved in the metabolism of angiotensin II associated with aminopeptidase A deficiency. Kidneys harvested from aminopeptidase A knockout mice were examined by light and electron microscopy, immunohistochemistry and immunofluorescence. Kidney angiotensin II levels and the ability of renin angiotensin system enzymes in the glomerulus to degrade angiotensin II ex vivo, their activities, protein and mRNA levels in kidney lysates were evaluated. Knockout mice had increased blood pressure and mild glomerular mesangial expansion without significant albuminuria. By electron microscopy, knockout mice exhibited a mild increase of the mesangial matrix, moderate thickening of the glomerular basement membrane but a striking appearance of knob-like structures. These knobs were seen in both male and female mice and persisted after the treatment of hypertension. In isolated glomeruli from knockout mice, the level of angiotensin II was more than three-fold higher as compared to wild type control mice. In kidney lysates from knockout mice angiotensin converting enzyme activity, protein and mRNA levels were markedly decreased possibly as a compensatory mechanism to reduce angiotensin II formation. Thus, our findings support a role for aminopeptidase A in the maintenance of glomerular structure and intra-kidney homeostasis of angiotensin peptides.
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Affiliation(s)
- Benedikt Marahrens
- Division of Nephrology and Hypertension, Department of Medicine, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA; Charité University Medicine Berlin, Berlin, Germany
| | - Arndt Schulze
- Division of Nephrology and Hypertension, Department of Medicine, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA; Charité University Medicine Berlin, Berlin, Germany
| | - Jan Wysocki
- Division of Nephrology and Hypertension, Department of Medicine, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA
| | - Meei-Hua Lin
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Minghao Ye
- Division of Nephrology and Hypertension, Department of Medicine, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael Bader
- Charité University Medicine Berlin, Berlin, Germany; DZHK (German Center for Cardiovascular Research), Partner Site Berlin, Berlin, Germany; Max-Delbrück-Center for Molecular Medicine, Berlin, Germany; Institute for Biology, University of Lübeck, Lübeck, Germany
| | - Juan Carlos Q Velez
- Department of Nephrology, Ochsner Clinic Foundation, New Orleans, Louisiana, USA
| | - Jeffrey H Miner
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Daniel Batlle
- Division of Nephrology and Hypertension, Department of Medicine, Northwestern University/Feinberg School of Medicine, Chicago, Illinois, USA.
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15
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Qiu L, Lai X, Wang JJ, Yeap XY, Han S, Zheng F, Lin C, Zhang Z, Procissi D, Fang D, Li L, Thorp EB, Abecassis MM, Kanwar YS, Zhang ZJ. Kidney-intrinsic factors determine the severity of ischemia/reperfusion injury in a mouse model of delayed graft function. Kidney Int 2020; 98:1489-1501. [PMID: 32822703 PMCID: PMC7814505 DOI: 10.1016/j.kint.2020.07.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 06/12/2020] [Accepted: 07/09/2020] [Indexed: 02/06/2023]
Abstract
Delayed graft function due to transplant ischemia/reperfusion injury adversely affects up to 50% of deceased-donor kidney transplant recipients. However, key factors contributing to the severity of ischemia/reperfusion injury remain unclear. Here, using a clinically relevant mouse model of delayed graft function, we demonstrated that donor genetic background and kidney-intrinsic MyD88/Trif-dependent innate immunity were key determinants of delayed graft function. Functional deterioration of kidney grafts directly corresponded with the duration of cold ischemia time. The graft dysfunction became irreversible after cold ischemia time exceeded six hours. When cold ischemia time reached four hours, kidney grafts displayed histological features reflective of delayed graft function seen in clinical kidney transplantation. Notably, kidneys of B6 mice exhibited significantly more severe histological and functional impairment than kidneys of C3H or BALB/c mice, regardless of recipient strains or alloreactivities. Furthermore, allografts of B6 mice also showed an upregulation of IL-6, neutrophil gelatinase-associated lipocalin, and endoplasmic reticulum stress genes, as well as an increased influx of host neutrophils and memory CD8 T-cells. In contrast, donor MyD88/Trif deficiency inhibited neutrophil influx and decreased the expression of IL-6 and endoplasmic reticulum stress genes, along with improved graft function and prolonged allograft survival. Thus, kidney-intrinsic factors involving genetic characteristics and innate immunity serve as critical determinants of the severity of delayed graft function. This preclinical murine model allows for further investigations of the mechanisms underlying delayed graft function.
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Affiliation(s)
- Longhui Qiu
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xingqiang Lai
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Organ Transplant Center, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xin Yi Yeap
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Shulin Han
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Feibo Zheng
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Charlie Lin
- Weinberg Art and Science College, Northwestern University, Evanston, Illinois, USA
| | - Zhuoli Zhang
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Daniele Procissi
- Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Lin Li
- Department of Pathology and Laboratory Medicine, Cedars Sinai Medical Center, West Hollywood, California, USA
| | - Edward B Thorp
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael M Abecassis
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Medicine (Nephrology and Hypertension), Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zheng J Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
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16
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Long J, Galvan DL, Mise K, Kanwar YS, Li L, Poungavrin N, Overbeek PA, Chang BH, Danesh FR. Role for carbohydrate response element-binding protein (ChREBP) in high glucose-mediated repression of long noncoding RNA Tug1. J Biol Chem 2020; 295:15840-15852. [PMID: 32467232 PMCID: PMC7681008 DOI: 10.1074/jbc.ra120.013228] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/25/2020] [Indexed: 12/28/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) have been shown to play key roles in a variety of biological activities of the cell. However, less is known about how lncRNAs respond to environmental cues and what transcriptional mechanisms regulate their expression. Studies from our laboratory have shown that the lncRNA Tug1 (taurine upregulated gene 1) is crucial for the progression of diabetic kidney disease, a major microvascular complication of diabetes. Using a combination of proximity labeling with the engineered soybean ascorbate peroxidase (APEX2), ChIP-qPCR, biotin-labeled oligonucleotide pulldown, and classical promoter luciferase assays in kidney podocytes, we extend our initial observations in the current study and now provide a detailed analysis on a how high-glucose milieu downregulates Tug1 expression in podocytes. Our results revealed an essential role for the transcription factor carbohydrate response element binding protein (ChREBP) in controlling Tug1 transcription in the podocytes in response to increased glucose levels. Along with ChREBP, other coregulators, including MAX dimerization protein (MLX), MAX dimerization protein 1 (MXD1), and histone deacetylase 1 (HDAC1), were enriched at the Tug1 promoter under high-glucose conditions. These observations provide the first characterization of the mouse Tug1 promoter's response to the high-glucose milieu. Our findings illustrate a molecular mechanism by which ChREBP can coordinate glucose homeostasis with the expression of the lncRNA Tug1 and further our understanding of dynamic transcriptional regulation of lncRNAs in a disease state.
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Affiliation(s)
- Jianyin Long
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA
| | - Daniel L Galvan
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA
| | - Koki Mise
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA; Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yashpal S Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Li Li
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA; Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Naravat Poungavrin
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Paul A Overbeek
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | - Benny H Chang
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA
| | - Farhad R Danesh
- Section of Nephrology, Division of Internal Medicine, The University of Texas at MD Anderson Cancer Center, Houston, Texas, USA; Department of Pharmacology & Chemical Biology, Baylor College of Medicine, Houston, Texas, USA.
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17
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Tawhari I, Fenton SE, Sosman JA, Sustento-Reodica N, Kanwar YS, Aggarwal V. Hyperacute Onset of Immune Checkpoint Inhibitor-Related Acute Interstitial Nephritis. Kidney Int Rep 2020; 5:2084-2088. [PMID: 33163728 PMCID: PMC7609883 DOI: 10.1016/j.ekir.2020.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/13/2020] [Accepted: 08/04/2020] [Indexed: 11/20/2022] Open
Affiliation(s)
- Ibrahim Tawhari
- Division of Nephrology and Hypertension, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
| | - Sarah E. Fenton
- Division of Hematology and Oncology, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
| | - Jeffery A. Sosman
- Division of Hematology and Oncology, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
| | - Nedjema Sustento-Reodica
- Department of Pathology, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
- Division of Nephrology and Hypertension, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
| | - Vikram Aggarwal
- Division of Nephrology and Hypertension, Northwestern University–Feinberg School of Medicine, Chicago, Illinois, USA
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18
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Itano S, Kadoya H, Satoh M, Nakamura T, Murase T, Sasaki T, Kanwar YS, Kashihara N. Non-purine selective xanthine oxidase inhibitor ameliorates glomerular endothelial injury in Ins Akita diabetic mice. Am J Physiol Renal Physiol 2020; 319:F765-F772. [PMID: 32954851 DOI: 10.1152/ajprenal.00236.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Endothelial dysfunction represents a predominant early feature of diabetes, rendering patients with diabetes prone to renal complications, e.g., proteinuria. Recent studies have indicated a possible role for xanthine oxidase (XO) in the pathogenesis of vascular dysfunctions associated with diabetes. In the present study, we investigated the contribution of XO activation on the progression of diabetic nephropathy in a mouse model using selective XO inhibitors. Male Ins2Akita heterozygous mice were used with wild-type mice as controls. Akita mice were treated with topiroxostat (Topi) or vehicle for 4 wk. Serum uric acid levels were significantly reduced in Akita + Topi mice compared with Akita + vehicle mice. The Akita + Topi group had a significant reduction in urinary albumin excretion compared with the Akita + vehicle group. Mesangial expansion, glomerular collagen type IV deposition, and glomerular endothelial injury (assessed by lectin staining and transmission electron microscopy) were considerably reduced in the Akita + topi group compared with the Akita + vehicle group. Furthermore, glomerular permeability was significantly higher in the Akita + vehicle group compared with the wild-type group. These changes were reduced with the administration of Topi. We conclude that XO inhibitors preserve glomerular endothelial functions and rescue compromised glomerular permeability, suggesting that XO activation plays a vital role in the pathogenesis of diabetic nephropathy.
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Affiliation(s)
- Seiji Itano
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Hiroyuki Kadoya
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Minoru Satoh
- Department of General Medicine/Nephrology, Kobe Rosai Hospital, Kobe, Hyogo, Japan
| | - Takashi Nakamura
- Pharmacological Study Group, Pharmaceutical Research Laboratories, Sanwa Kagaku Kenkyusho, Mie, Japan
| | - Takayo Murase
- Radioisotope and Chemical Analysis Center, Laboratory Management Department, Sanwa Kagaku Kenkyusho, Mie, Japan
| | - Tamaki Sasaki
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Yashpal S Kanwar
- Department of Pathology and Medicine, Northwestern University, Chicago, Illinois, USA
| | - Naoki Kashihara
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
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19
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Shah S, DeBerge M, Iovane A, Yan S, Qiu L, Wang JJ, Kanwar YS, Hummel M, Zhang ZJ, Abecassis MM, Luo X, Thorp EB. MCMV Dissemination from Latently-Infected Allografts Following Transplantation into Pre-Tolerized Recipients. Pathogens 2020; 9:pathogens9080607. [PMID: 32722544 PMCID: PMC7460028 DOI: 10.3390/pathogens9080607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 02/06/2023] Open
Abstract
Transplantation tolerance is achieved when recipients are unresponsive to donor alloantigen yet mobilize against third-party antigens, including virus. After transplantation, cytomegalovirus (CMV) reactivation in latently-infected transplants reduces allograft viability. To determine if pre-tolerized recipients are resistant to viral dissemination in this setting, we transfused chemically-fixed donor splenocytes (1-ethyl-3- (3′-dimethyl-aminopropyl)-carbo-diimide (ECDI)-treated splenocytes (ECDIsp)) to induce donor antigen tolerance without immunosuppression. In parallel, we implanted donor islet cells to validate operational tolerance. These pre-tolerized recipients were implanted with murine CMV (MCMV) latently-infected donor kidneys (a validated model of CMV latency) to monitor graft inflammation and viral dissemination. Our results indicate that tolerance to donor islets was sustained in recipients after implantation of donor kidneys. In addition, kidney allografts implanted after ECDIsp and islet implantation exhibited low levels of fibrosis and tubulitis. In contrast, kidney cellular and innate immune infiltrates trended higher in the CMV group and exhibited increased markers of CD8+ T cell activation. Tolerance induction was unable to prevent increases in MCMV-specific CD8+ T cells or dissemination of viral IE-1 DNA. Our data suggest that latently-infected allografts are inherently more susceptible to inflammation that is associated with viral dissemination in pre-tolerized recipients. Thus, CMV latently-infected allografts require enhanced strategies to protect allograft integrity and viral spread.
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Affiliation(s)
- Sahil Shah
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA;
| | - Matthew DeBerge
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (M.D.); (Y.S.K.)
| | - Andre Iovane
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
| | - Shixian Yan
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
| | - Longhui Qiu
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (M.D.); (Y.S.K.)
| | - Mary Hummel
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Zheng J. Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
| | | | - Xunrong Luo
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, NC 27705, USA;
| | - Edward B. Thorp
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (M.D.); (Y.S.K.)
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; (A.I.); (S.Y.); (L.Q.); (J.-J.W.); (M.H.); (Z.J.Z.)
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
- Correspondence: ; Tel.: +1-312-503-4309
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20
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Deng F, Sharma I, Dai Y, Yang M, Kanwar YS. Myo-inositol oxygenase expression profile modulates pathogenic ferroptosis in the renal proximal tubule. J Clin Invest 2020; 129:5033-5049. [PMID: 31437128 DOI: 10.1172/jci129903] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 08/16/2019] [Indexed: 01/01/2023] Open
Abstract
Overexpression of myo-inositol oxygenase (MIOX), a proximal tubular enzyme, exacerbates cellular redox injury in acute kidney injury (AKI). Ferroptosis, a newly coined term associated with lipid hydroperoxidation, plays a critical role in the pathogenesis of AKI. Whether or not MIOX exacerbates tubular damage by accelerating ferroptosis in cisplatin-induced AKI remains elusive. Cisplatin-treated HK-2 cells exhibited notable cell death, which was reduced by ferroptosis inhibitors. Also, alterations in various ferroptosis metabolic sensors, including lipid hydroperoxidation, glutathione peroxidase 4 (GPX4) activity, NADPH and reduced glutathione (GSH) levels, and ferritinophagy, were observed. These perturbations were accentuated by MIOX overexpression, while ameliorated by MIOX knockdown. Likewise, cisplatin-treated CD1 mice exhibited tubular damage and derangement of renal physiological parameters, which were alleviated by ferrostatin-1, a ferroptosis inhibitor. To investigate the relevance of MIOX to ferroptosis, WT mice, MIOX-overexpressing transgenic (MIOX-Tg) mice, and MIOX-KO mice were subjected to cisplatin treatment. In comparison with cisplatin-treated WT mice, cisplatin-treated MIOX-Tg mice had more severe renal pathological changes and perturbations in ferroptosis metabolic sensors, which were minimal in cisplatin-treated MIOX-KO mice. In conclusion, these findings indicate that ferroptosis, an integral process in the pathogenesis of cisplatin-induced AKI, is modulated by the expression profile of MIOX.
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Affiliation(s)
- Fei Deng
- Department of Urology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China.,Department of Pathology & Medicine, Northwestern University, Chicago, Illinois, USA
| | - Isha Sharma
- Department of Pathology & Medicine, Northwestern University, Chicago, Illinois, USA
| | - Yingbo Dai
- Department of Urology, The Fifth Affiliated Hospital of Sun Yet-Sen University, Zhuhai, Guangdong, China
| | - Ming Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yashpal S Kanwar
- Department of Pathology & Medicine, Northwestern University, Chicago, Illinois, USA
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21
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Sharma I, Deng F, Liao Y, Kanwar YS. Myo-inositol Oxygenase (MIOX) Overexpression Drives the Progression of Renal Tubulointerstitial Injury in Diabetes. Diabetes 2020; 69:1248-1263. [PMID: 32169892 PMCID: PMC7243294 DOI: 10.2337/db19-0935] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 03/07/2020] [Indexed: 12/11/2022]
Abstract
Conceivably, upregulation of myo-inositol oxygenase (MIOX) is associated with altered cellular redox. Its promoter includes oxidant-response elements, and we also discovered binding sites for XBP1, a transcription factor of endoplasmic reticulum (ER) stress response. Previous studies indicate that MIOX's upregulation in acute tubular injury is mediated by oxidant and ER stress. Here, we investigated whether hyperglycemia leads to accentuation of oxidant and ER stress while these boost each other's activities, thereby augmenting tubulointerstitial injury/fibrosis. We generated MIOX-overexpressing transgenic (MIOX-TG) and MIOX knockout (MIOX-KO) mice. A diabetic state was induced by streptozotocin administration. Also, MIOX-KO were crossbred with Ins2 Akita to generate Ins2 Akita/KO mice. MIOX-TG mice had worsening renal functions with kidneys having increased oxidant/ER stress, as reflected by DCF/dihydroethidium staining, perturbed NAD-to-NADH and glutathione-to-glutathione disulfide ratios, increased NOX4 expression, apoptosis and its executionary molecules, accentuation of TGF-β signaling, Smads and XBP1 nuclear translocation, expression of GRP78 and XBP1 (ER stress markers), and accelerated tubulointerstitial fibrosis. These changes were not seen in MIOX-KO mice. Interestingly, such changes were remarkably reduced in Ins2 Akita/KO mice and, likewise, in vitro experiments with XBP1 siRNA. These findings suggest that MIOX expression accentuates, while its deficiency shields kidneys from, tubulointerstitial injury by dampening oxidant and ER stress, which mutually enhance each other's activity.
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Affiliation(s)
- Isha Sharma
- Department of Pathology, Northwestern University, Chicago, IL
| | - Fei Deng
- Department of Pathology, Northwestern University, Chicago, IL
| | - Yingjun Liao
- Department of Pathology, Northwestern University, Chicago, IL
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22
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Zhan M, Kanwar YS. An enigma: does a high-protein diet accelerate renal damage in humans? Lessons from diabetic animal models. Am J Physiol Renal Physiol 2020; 318:F979-F981. [PMID: 32174145 DOI: 10.1152/ajprenal.00076.2020] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Ming Zhan
- Department of Nephrology, Ningbo First Hospital, Zhejiang University, China.,Department of Pathology and Medicine, Northwestern University, Chicago, Illinois
| | - Yashpal S Kanwar
- Department of Pathology and Medicine, Northwestern University, Chicago, Illinois
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23
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Dangi A, Yu S, Lee FT, Burnette M, Wang JJ, Kanwar YS, Zhang ZJ, Abecassis M, Thorp EB, Luo X. Murine cytomegalovirus dissemination but not reactivation in donor-positive/recipient-negative allogeneic kidney transplantation can be effectively prevented by transplant immune tolerance. Kidney Int 2020; 98:147-158. [PMID: 32471635 PMCID: PMC7311252 DOI: 10.1016/j.kint.2020.01.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/23/2019] [Revised: 12/17/2019] [Accepted: 01/24/2020] [Indexed: 12/12/2022]
Abstract
Cytomegalovirus (CMV) reactivation from latently infected donor organs post-transplantation and its dissemination cause significant comorbidities in transplant recipients. Transplant-induced inflammation combined with chronic immunosuppression has been thought to provoke CMV reactivation and dissemination, although sequential events in this process have not been studied. Here, we investigated this process in a high-risk donor CMV-positive to recipient CMV-negative allogeneic murine kidney transplantation model. Recipients were either treated with indefinite immunosuppression or tolerized in a donor-specific manner. Untreated recipients served as controls. Kidney allografts from both immunosuppressed and tolerized recipients showed minimal alloimmunity-mediated graft inflammation and normal function for up to day 60 post-transplantation. However, despite the absence of such inflammation in the immunosuppressed and tolerized groups, CMV reactivation in the donor positive kidney allograft was readily observed. Interestingly, subsequent CMV replication and dissemination to distant organs only occurred in immunosuppressed recipients in which CMV-specific CD8 T cells were functionally impaired; whereas in tolerized recipients, host anti-viral immunity was well-preserved and CMV dissemination was effectively prevented. Thus, our studies uncoupled CMV reactivation from its dissemination, and underscore the potential role of robust transplantation tolerance in preventing CMV diseases following allogeneic kidney transplantation.
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Affiliation(s)
- Anil Dangi
- Nephrology, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Shuangjin Yu
- Nephrology, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA; Division of Organ Transplantation, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Frances T Lee
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Melanie Burnette
- Nephrology, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Yashpal S Kanwar
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Nephrology and Hypertension, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Zheng J Zhang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Michael Abecassis
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Edward B Thorp
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Xunrong Luo
- Nephrology, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA; Duke Transplant Center, Duke University Medical Center, Durham, North Carolina, USA.
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24
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Zhang Z, Qiu L, Yan S, Wang JJ, Thomas PM, Kandpal M, Zhao L, Iovane A, Liu XF, Thorp EB, Chen Q, Hummel M, Kanwar YS, Abecassis MM. A clinically relevant murine model unmasks a "two-hit" mechanism for reactivation and dissemination of cytomegalovirus after kidney transplant. Am J Transplant 2019; 19:2421-2433. [PMID: 30947382 PMCID: PMC6873708 DOI: 10.1111/ajt.15376] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [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: 01/25/2019] [Revised: 03/17/2019] [Accepted: 03/24/2019] [Indexed: 01/25/2023]
Abstract
Reactivation of latent cytomegalovirus remains an important complication after transplant. Although immunosuppression (IS) has been implicated as a primary cause, we have previously shown that the implantation response of a kidney allograft can lead to early transcriptional activation of latent murine cytomegalovirus (MCMV) genes in an immune-competent host and to MCMV reactivation and dissemination to other organs in a genetically immune-deficient recipient. We now describe a model that allows us to separately analyze the impact of the implantation effect vs that of a clinically relevant IS regimen. Treatment with IS of latently infected mice alone does not induce viral reactivation, but transplant of latently infected allogeneic kidneys combined with IS facilitates MCMV reactivation in the graft and dissemination to other organs. The IS regimen effectively dampens allo-immune inflammatory pathways and depletes recipient anti-MCMV but does not affect ischemia-reperfusion injury pathways. MCMV reactivation similar to that seen in allogeneic transplants combined with also occurs after syngeneic transplants. Thus, our data strongly suggest that while ischemia-reperfusion injury of the implanted graft is sufficient and necessary to initiate transcriptional reactivation of latent MCMV ("first hit"), IS is permissive to the first hit and facilitates dissemination to other organs ("second hit").
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Affiliation(s)
- Zheng Zhang
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Surgery, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Longhui Qiu
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Shixian Yan
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Jiao-Jing Wang
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Paul M. Thomas
- Department of Chemistry and Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois
| | - Manoj Kandpal
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Preventive Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Lihui Zhao
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Preventive Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Andre Iovane
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Xue-feng Liu
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Surgery, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Edward B. Thorp
- Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Qing Chen
- Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Mary Hummel
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Surgery, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Microbiology and Immunology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Nephrology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
| | - Michael M. Abecassis
- Comprehensive Transplant Center, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Surgery, Northwestern University, Feinberg School of Medicine, Chicago, Illinois,Department of Microbiology and Immunology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois
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25
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Yang S, Zhao L, Han Y, Liu Y, Chen C, Zhan M, Xiong X, Zhu X, Xiao L, Hu C, Liu F, Zhou Z, Kanwar YS, Sun L. Corrigendum to "Probucol ameliorates renal injury in diabetic nephropathy by inhibiting the expression of the redox enzyme p66Shc" [Redox Biol. 13 (2017) 482-497]. Redox Biol 2019; 26:101276. [PMID: 31350214 PMCID: PMC6831860 DOI: 10.1016/j.redox.2019.101276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Shikun Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China; Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Zhao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Yachun Han
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Yu Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Chao Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Ming Zhan
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Xiaofen Xiong
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Chun Hu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Fuyou Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China
| | - Zhiguang Zhou
- Diabetes Center, Institute of Metabolism and Endocrinology, Key Laboratory of Diabetes Immunology, Ministry of Education, China
| | - Yashpal S Kanwar
- Department of Pathology & Medicine, Northwestern University, Chicago, USA
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan, 410011, China.
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26
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Xie P, Kondeti VK, Lin S, Haruna Y, Raparia K, Kanwar YS. Withdrawal: Role of extracellular matrix renal tubulo-interstitial nephritis antigen (TINag) in cell survival utilizing integrin αvβ3/focal adhesion kinase (FAK)/phosphatidylinositol 3-kinase (PI3K)/protein kinase B-serine/threonine kinase (AKT) signaling pathway. J Biol Chem 2019; 294:10379. [PMID: 31253687 DOI: 10.1074/jbc.w119.009585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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27
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Sun L, Pan X, Wada J, Haas CS, Wuthrich RP, Danesh FR, Chugh SS, Kanwar YS. Withdrawal: Isolation and functional analysis of mouse UbA52 gene and its relevance to diabetic nephropathy. J Biol Chem 2019; 294:10382. [DOI: 10.1074/jbc.w119.009588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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28
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Lin S, Sahai A, Chugh SS, Pan X, Wallner EI, Danesh FR, Lomasney JW, Kanwar YS. Withdrawal: High glucose stimulates synthesis of fibronectin via a novel protein kinase C, Rap1b, and B-Raf signaling pathway. J Biol Chem 2019; 294:10381. [DOI: 10.1074/jbc.w119.009587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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29
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Sun L, Dutta RK, Xie P, Kanwar YS. Withdrawal: myo-Inositol oxygenase overexpression accentuates generation of reactive oxygen species and exacerbates cellular injury following high glucose ambience: A new mechanism relevant to the pathogenesis of diabetic nephropathy. J Biol Chem 2019; 294:10380. [DOI: 10.1074/jbc.w119.009586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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30
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Yang M, Zhao L, Gao P, Zhu X, Han Y, Chen X, Li L, Xiao Y, Wei L, Li C, Xiao L, Yuan S, Liu F, Dong LQ, Kanwar YS, Sun L. DsbA-L ameliorates high glucose induced tubular damage through maintaining MAM integrity. EBioMedicine 2019; 43:607-619. [PMID: 31060900 PMCID: PMC6558222 DOI: 10.1016/j.ebiom.2019.04.044] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/07/2019] [Accepted: 04/23/2019] [Indexed: 12/17/2022] Open
Abstract
Background The mitochondrial associated endoplasmic reticulum (ER) membrane (MAM) provides a platform for communication between the mitochondria and ER, and it plays a vital role in many biological functions. Disulphide-bond A oxidoreductase-like protein (DsbA-L), expressed in the MAM, serves as an antioxidant and reduces ER stress. However, the role of DsbA-L and MAM in kidney pathobiology remains unclear. Methods Molecular biology techniques, transmission electron microscopy (TEM), in situ proximity ligation assays (PLAs), confocal microscopy, TUNEL staining and flow cytometry were utilized to analyse apoptosis and status of MAM in DsbA-L mutant mice. Findings We showed that MAM was significantly reduced in the kidneys of streptozotocin-induced diabetic mice, which correlated with the extent of renal injury. We also observed a correlation between the loss of MAM integrity and increased apoptosis and renal injury in diabetic nephropathy (DN). These alterations were further exacerbated in diabetic DsbA-L gene-deficient mice (DsbA-L−/−). In vitro, overexpression of DsbA-L in HK-2 cells restored MAM integrity and reduced apoptosis induced by high-glucose ambience. These beneficial effects were partially blocked by overexpression of FATE-1, a MAM uncoupling protein. Finally, the expression of DsbA-L was positively correlated with MAM integrity in the kidneys of DN patients but negatively correlated with apoptosis and renal injury. Interpretation Our results indicate that DsbA-L exerts an antiapoptotic effect by maintaining MAM integrity, which is apparently disrupted in DN. Fund This work was supported by the National Natural Science Foundation of China (81730018), the National Key R&D Program of China (2016YFC1305501) and NIH (DK60635).
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Affiliation(s)
- Ming Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Li Zhao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Peng Gao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Yachun Han
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xianghui Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Li Li
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Ying Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Ling Wei
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Chenrui Li
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Shuguang Yuan
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Fuyou Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Lily Q Dong
- Department of Cell Systems & Anatomy, University of Texas Health at San Antonio, San Antonio, TX 78229, USA
| | - Yashpal S Kanwar
- Departments of Pathology & Medicine, Northwestern University, Chicago, IL, USA
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
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31
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Deng* F, Dai Y, Sharma I, Kanwar YS. MP77-16 MYO-INOSITOL OXYGENASE PROMOTES FERROPTOSIS IN CISPLATIN-INDUCED NEPHROPATHY. J Urol 2019. [DOI: 10.1097/01.ju.0000557328.63714.c7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Fei Deng*
- Changsha, China, People’s Republic of
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32
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Chen X, Han Y, Gao P, Yang M, Xiao L, Xiong X, Zhao H, Tang C, Chen G, Zhu X, Yuan S, Liu F, Dong LQ, Liu F, Kanwar YS, Sun L. Disulfide-bond A oxidoreductase-like protein protects against ectopic fat deposition and lipid-related kidney damage in diabetic nephropathy. Kidney Int 2019; 95:880-895. [PMID: 30791996 DOI: 10.1016/j.kint.2018.10.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [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: 06/04/2018] [Revised: 10/17/2018] [Accepted: 10/24/2018] [Indexed: 12/31/2022]
Abstract
Ectopic fat deposition (EFD) in the kidney has been shown to play a causal role in diabetic nephropathy; however, the mechanism underlying EFD remains elusive. By transcriptome analysis, we found decreased expression levels of disulfide-bond A oxidoreductase-like protein (DsbA-L) in the kidneys of diabetic mice (induced by high-fat diet plus Streptozotocin) compared with control mice. Increased expression of adipocyte differentiation-related protein and abnormal levels of collagen I, fibronectin, and phosphorylated 5'AMP-activated kinase (p-AMPK), adipose triglyceride lipase (p-ATGL), and HMG-CoA reductase (p-HMGCR) were also observed in diabetic mice. These alterations were accompanied by deposition of lipid droplets in the kidney, and were more pronounced in diabetic DsbA-L knockout mice. In vitro, overexpression of DsbA-L ameliorated high glucose-induced intracellular lipid droplet deposition in a human proximal tubular cell line, and DsbA-L siRNA aggravated lipid droplet deposition and reduced the levels of p-AMPK, p-ATGL, and p-HMGCR. High glucose and palmitic acid treatment enhanced the expression of interleukin-1β and interleukin-18; these enhancements were further increased after treatment with DsbA-L siRNA but alleviated by co-treatment with an AMPK activator. In kidney biopsy tissue from patients with diabetic nephropathy, DsbA-L expression was negatively correlated with EFD and tubular damage. Collectively, these results suggest that DsbA-L has a protective role against EFD and lipid-related kidney damage in diabetic nephropathy. Activation of the AMPK pathway is a potential mechanism underlying DsbA-L action in the kidney.
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Affiliation(s)
- Xianghui Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yachun Han
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Peng Gao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ming Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiaofen Xiong
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hao Zhao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chengyuan Tang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Guochun Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shuguang Yuan
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fuyou Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lily Q Dong
- Department of Cell Systems & Anatomy, University of Texas Health at San Antonio, San Antonio, Texas, USA
| | - Feng Liu
- Department of Pharmacology, University of Texas Health at San Antonio, San Antonio, Texas, USA
| | - Yashpal S Kanwar
- Departments of Pathology & Medicine, Northwestern University, Chicago, Illinois, USA
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
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Tominaga T, Sharma I, Fujita Y, Doi T, Wallner AK, Kanwar YS. Myo-inositol oxygenase accentuates renal tubular injury initiated by endoplasmic reticulum stress. Am J Physiol Renal Physiol 2018; 316:F301-F315. [PMID: 30539651 DOI: 10.1152/ajprenal.00534.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Besides oxidant stress, endoplasmic reticulum (ER) stress has been implicated in the pathogenesis of various metabolic disorders affecting the kidney. These two forms of stresses are not mutually exclusive to each other and may operate by a feedback loop in worsening the cellular injury. To attest to this contention, studies were performed to assess whether in such a setting, there is worsening of tubulointerstitial injury. We employed tunicamycin as a model of ER stress and used tubular cells and mice overexpressing myo-inositol oxygenase (MIOX), an enzyme involved in glycolytic events with excessive generation of ROS. Concomitant treatment of tunicamycin and transfection of cells with MIOX-pcDNA led to a marked generation of ROS, which was reduced by MIOX-siRNA. Likewise, an accentuated expression of ER stress sensors, GRP78, XBP1, and CHOP, was observed, which was reduced with MIOX-siRNA. These sensors were markedly elevated in MIOX-TG mice compared with WT treated with tunicamycin. This was accompanied with marked deterioration of tubular morphology, along with impairment of renal functions. Interestingly, minimal damage and elevation of ER stressors was observed in MIOX-KO mice. Downstream events that were more adversely affected in MIOX-TG mice included accentuated expression of proapoptogenic proteins, proinflammatory cytokines, and extracellular matrix constituents, although expression of these molecules was unaffected in MIOX-KO mice. Also, their tunicamycin-induced accentuated expression in tubular cells was notably reduced with MIOX-siRNA. These studies suggest that the biology of MIOX-induced oxidant stress and tunicamycin-induced ER stress are interlinked, and both of the events may feed into each other to amplify the tubulointerstitial injury.
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Affiliation(s)
- Tatsuya Tominaga
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
| | - Isha Sharma
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
| | - Yui Fujita
- Department of Nephrology, Tokushima University , Tokushima , Japan
| | - Toshio Doi
- Department of Nephrology, Tokushima University , Tokushima , Japan
| | - Aryana K Wallner
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
| | - Yashpal S Kanwar
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
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Kan L, Jain S, Cook W, Cao WQ, Usuda N, Yeldandi AV, Rao MS, Kanwar YS, Reddy JK. Cloning and expression of the mouse deoxyuridine triphosphate nucleotidohydrolase gene: differs from the rat enzyme in that it lacks nuclear receptor interacting LXXLL motif. Gene Expr 2018; 8:231-46. [PMID: 10794525 PMCID: PMC6157361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We have previously reported the cloning of rat deoxyuridine triphosphate nucleotidohydrolase (dUTPase) cDNA and demonstrated that the full-length protein as well as the N-terminal 62-amino acid peptide interacts with peroxisome proliferator-activated receptor alpha (PPARalpha). We now report the cloning of mouse dUTPase cDNA and show that it contains a 162-amino acid open reading frame, encoding a protein with a predicted Mr of 17,400 and differs from rat cDNA, which contains additional 43 amino acids at the N-terminal end. Unlike rat dUTPase, mouse dUTPase failed to bind PPARalpha. An evaluation of 205 amino acid containing rat dUTPase cDNA revealed that the N-terminal 43 extra amino acid segment contains an LXXLL signature motif, considered necessary and sufficient for the binding of several cofactors with nuclear receptors, and its absence in murine dUTPase possibly accounts for the differential binding of these enzymes to PPARalpha. In situ hybridization and immunohistochemical studies revealed that, in the adult mouse, dUTPase is expressed at high levels in proliferating cells of colonic mucosa, and of germinal epithelium in testis. At 9.5-day mouse embryonic development, dUTPase expression is predominantly in developing neural epithelium, and hepatic primordium, and in later developmental stages (11.5-, 13.5-, and 15.5-day embryo), the expression began to be localized to the liver, kidney, gut epithelium, thymus, granular layer of the cerebellum, and olfactory epithelium. We also show that the murine dUTPase gene comprises 6 exons and the 5'-flanking region of -1479 to -27, which exhibited high promoter activity, contains a typical TATA box and multiple cis-elements such as Sp-1, AP2, AP3, AP4, Ker1, RREB, and CREB binding sites. These observations suggest the existence of variants of dUTPase, some of which may influence nuclear receptor function during development and differentiation, in addition to catalyzing the hydrolysis of dUTP to dUMP.
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Affiliation(s)
- Lixin Kan
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Sanjay Jain
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - William Cook
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Wen-Qing Cao
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Nobuteru Usuda
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Anjana V. Yeldandi
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - M. Sambasiva Rao
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
| | - Janardan K. Reddy
- Department of Pathology, Northwestern University Medical School, Chicago, IL 60611
- Address correspondence to Janardan K. Reddy, Department of Pathology, Northwestern University Medical School, 303 East Chicago Avenue, Chicago, IL 60611-3008. Tel: (312) 503-8144; Fax: (312) 503-8249; E-mail:
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35
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Fujita Y, Tominaga T, Abe H, Kangawa Y, Fukushima N, Ueda O, Jishage KI, Kishi S, Murakami T, Saga Y, Kanwar YS, Nagai K, Doi T. An adjustment in BMP4 function represents a treatment for diabetic nephropathy and podocyte injury. Sci Rep 2018; 8:13011. [PMID: 30158674 PMCID: PMC6115362 DOI: 10.1038/s41598-018-31464-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 07/09/2018] [Indexed: 01/03/2023] Open
Abstract
Podocyte injury has been proposed to play an important role in diabetic nephropathy; however, its pathological mechanism remains unclear. We have shown that bone morphogenetic protein 4 (BMP4) signaling leads to the glomerular changes characteristic of this disorder. To analyze the molecular mechanism of podocyte injury, the effect of BMP4 was investigated using streptozotocin (STZ)-induced, Bmp4 heterozygous knockout (Bmp4+/−) and podocyte-specific Bmp4 knockout mice. Mice with STZ-induced diabetes exhibited glomerular matrix hyperplasia and decreased numbers of podocyte nucleus-specific WT1-positive cells. The number of podocytes and proteinuria were improved in both diabetic Bmp4 knockout mouse models compared to the effects observed in the control mice. The effect of BMP4 overexpression on Bmp4-induced or podocyte-specific transgenic mice was examined. Tamoxifen-induced Bmp4-overexpressing mice exhibited mesangial matrix expansion and decreased numbers of WT1-positive cells. Podocyte-specific Bmp4-overexpressing mice displayed increased kidney BMP4 expression and mesangial matrix expansion but decreased nephrin expression and numbers of WT1-positive cells. Both lines of Bmp4-overexpressing mice exhibited increased albuminuria. In cultured podocytes, BMP4 increased phospho-p38 levels. BMP4 decreased nephrin expression but increased cleaved caspase-3 levels. p38 suppression inhibited caspase-3 activation. Apoptosis was confirmed in STZ-diabetic glomeruli and Bmp4-overexpressing mice. Bmp4 +/− mice with diabetes displayed reduced apoptosis. Based on these data, the BMP4 signaling pathway plays important roles in the development of both podocyte injury and mesangial matrix expansion in diabetic nephropathy.
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Affiliation(s)
- Yui Fujita
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Tatsuya Tominaga
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan.
| | - Hideharu Abe
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Yumi Kangawa
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Naoshi Fukushima
- Research Division, Fuji Gotemba Research Labs, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan
| | - Otoya Ueda
- Research Division, Fuji Gotemba Research Labs, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan
| | - Kou-Ichi Jishage
- Research Division, Fuji Gotemba Research Labs, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan.,Chugai Research Institute for Medical Science Inc., Shizuoka, Japan
| | - Seiji Kishi
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Taichi Murakami
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Yumiko Saga
- Division of Mammalian Development, Genetic Strains Research Center, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Yashpal S Kanwar
- Department of Pathology & Medicine-Nephrology, FSM, Northwestern University, Chicago, Illinois, 60611, USA
| | - Kojiro Nagai
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Toshio Doi
- Department of Nephrology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
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36
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Jia Y, Liu N, Viswakarma N, Sun R, Schipma MJ, Shang M, Thorp EB, Kanwar YS, Thimmapaya B, Reddy JK. PIMT/NCOA6IP Deletion in the Mouse Heart Causes Delayed Cardiomyopathy Attributable to Perturbation in Energy Metabolism. Int J Mol Sci 2018; 19:ijms19051485. [PMID: 29772707 PMCID: PMC5983783 DOI: 10.3390/ijms19051485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/03/2018] [Accepted: 05/09/2018] [Indexed: 01/09/2023] Open
Abstract
PIMT/NCOA6IP, a transcriptional coactivator PRIP/NCOA6 binding protein, enhances nuclear receptor transcriptional activity. Germline disruption of PIMT results in early embryonic lethality due to impairment of development around blastocyst and uterine implantation stages. We now generated mice with Cre-mediated cardiac-specific deletion of PIMT (csPIMT−/−) in adult mice. These mice manifest enlargement of heart, with nearly 100% mortality by 7.5 months of age due to dilated cardiomyopathy. Significant reductions in the expression of genes (i) pertaining to mitochondrial respiratory chain complexes I to IV; (ii) calcium cycling cardiac muscle contraction (Atp2a1, Atp2a2, Ryr2); and (iii) nuclear receptor PPAR- regulated genes involved in glucose and fatty acid energy metabolism were found in csPIMT−/− mouse heart. Elevated levels of Nppa and Nppb mRNAs were noted in csPIMT−/− heart indicative of myocardial damage. These hearts revealed increased reparative fibrosis associated with enhanced expression of Tgfβ2 and Ctgf. Furthermore, cardiac-specific deletion of PIMT in adult mice, using tamoxifen-inducible Cre-approach (TmcsPIMT−/−), results in the development of cardiomyopathy. Thus, cumulative evidence suggests that PIMT functions in cardiac energy metabolism by interacting with nuclear receptor coactivators and this property could be useful in the management of heart failure.
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Affiliation(s)
- Yuzhi Jia
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Ning Liu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Navin Viswakarma
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA.
| | - Ruya Sun
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Mathew J Schipma
- Next Generation Sequencing Core Facility, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Meng Shang
- Feinberg Cardiovascular Research Institute and Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Edward B Thorp
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Yashpal S Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Bayar Thimmapaya
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
| | - Janardan K Reddy
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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37
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Hu C, Yang M, Zhu X, Gao P, Yang S, Han Y, Chen X, Xiao L, Yuan S, Liu F, Kanwar YS, Sun L. Effects of Omega-3 Fatty Acids on Markers of Inflammation in Patients With Chronic Kidney Disease: A Controversial Issue. Ther Apher Dial 2018; 22:124-132. [PMID: 29271576 PMCID: PMC5880693 DOI: 10.1111/1744-9987.12611] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 08/09/2017] [Accepted: 08/16/2017] [Indexed: 11/30/2022]
Abstract
Chronic kidney disease (CKD) is a global problem which contributes to a significant morbidity and mortality in China. Concomitant inflammatory state further boosts the mortality due to cardiovascular events in patients with CKD undergoing dialysis. There is a general notion that Omega-3 fatty acids including docosahexaenoic acids (DHA) and eicosapentaenoic (EPA) have certain health benefits perhaps via the regulation of inflammation. However, the anti-inflammatory effect of omega-3 fatty acids in patients with CKD is controversial. We analyzed the data of oral supplementation of omega-3 fatty acids in CKD patients by searching literature on database from inception to August 2016. The analysis included randomized controlled trials (RCTs) derived from multiple databases, and the effect of omega-3 fatty acids supplementation versus the control cohorts were compared. All of the data analysis was calculated by RevMan 5.2. A total of 12 RCTs involving 487 patients were included in the meta-analysis. Among them 254 patients received omega-3 fatty acids and 233 patients served as controls who received placebo. The meta-analysis revealed no statistical significance in serum levels of C-reactive protein (CRP) (SMD, -0.20; 95% CI, -0.44 to 0.05; P = 0.11), IL-6 (SMD, 0.00; 95% CI, -0.33 to 0.33; P = 0.99) and TNF-α (SMD, 0.14; 95% CI, -0.17 to 0.44; P = 0.38) between the omega-3 fatty acids supplementation group and control. This suggested that there is insufficient evidence to conclude the benefit of omega-3 fatty acids oral supplementation in reducing serum levels of CRP, IL-6 and TNF-α in patients with CKD.
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Affiliation(s)
- Chun Hu
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ming Yang
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xuejing Zhu
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Peng Gao
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shikun Yang
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
- Department of Nephrology, the third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yachun Han
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xianghui Chen
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Xiao
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shuguang Yuan
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fuyou Liu
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yashpal S. Kanwar
- Department of Pathology, Northwestern University, Chicago, Illinois; Department of Medicine, Northwestern University, Chicago, Illinois
| | - Lin Sun
- Department of Nephrology, 2 Xiangya Hospital, Central South University, Changsha, Hunan, China
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Han Y, Xu X, Tang C, Gao P, Chen X, Xiong X, Yang M, Yang S, Zhu X, Yuan S, Liu F, Xiao L, Kanwar YS, Sun L. Reactive oxygen species promote tubular injury in diabetic nephropathy: The role of the mitochondrial ros-txnip-nlrp3 biological axis. Redox Biol 2018; 16:32-46. [PMID: 29475133 PMCID: PMC5842313 DOI: 10.1016/j.redox.2018.02.013] [Citation(s) in RCA: 251] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/12/2018] [Accepted: 02/14/2018] [Indexed: 11/16/2022] Open
Abstract
NLRP3/IL-1β activation via thioredoxin (TRX)/thioredoxin-interacting protein (TXNIP) following mitochondria ROS (mtROS) overproduction plays a key role in inflammation. However, the involvement of this process in tubular damage in the kidneys of patients with diabetic nephropathy (DN) is unclear. Here, we demonstrated that mtROS overproduction is accompanied by decreases in TRX expression and TXNIP up-regulation. In addition, we discovered that mtROS overproduction is also associated with increases in NLRP3/IL-1β and TGF-β expression in the kidneys of patients with DN and db/db mice. We reversed these changes in db/db mice by administering a peritoneal injection of MitoQ, an antioxidant targeting mtROS. Similar results were observed in human tubular HK-2 cells subjected to high-glucose (HG) conditions and treated with MitoQ. Treating HK-2 cells with MitoQ suppressed the dissociation of TRX from TXNIP and subsequently blocked the interaction between TXNIP and NLRP3, leading to the inhibition of NLRP3 inflammasome activation and IL-1β maturation. The effects of MitoQ were enhanced by pretreatment with TXNIP siRNA and abolished by pretreatment with monosodium urate (MSU) and TRX siRNA in vitro. These results suggest that mitochondrial ROS-TXNIP/NLRP3/IL-1β axis activation is responsible for tubular oxidative injury, which can be ameliorated by MitoQ via the inhibition of mtROS overproduction. Reactive oxygen species promotes renal damage in diabetic nephropathy. Mitochondrial ROS- TXNIP-NLRP3 biological axis involved in tubular injury of DN. Inhibition of mitochondrial ROS by MitoQ ameliorated the renal tubular injury.
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Affiliation(s)
- Yachun Han
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xiaoxuan Xu
- Health Management Center, Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Chengyuan Tang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Peng Gao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xianghui Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xiaofen Xiong
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Ming Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Shikun Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Shuguang Yuan
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Fuyou Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Yashpal S Kanwar
- Departments of Pathology & Medicine, Northwestern University, Chicago, IL, USA
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
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Sharma I, Tupe RS, Wallner AK, Kanwar YS. Contribution of myo-inositol oxygenase in AGE:RAGE-mediated renal tubulointerstitial injury in the context of diabetic nephropathy. Am J Physiol Renal Physiol 2017; 314:F107-F121. [PMID: 28931523 DOI: 10.1152/ajprenal.00434.2017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Advanced glycation end products (AGEs) play a role in pathogenesis of diabetic nephropathy (DN). Myo-inositol oxygenase (MIOX) has been implicated in tubulointerstitial injury in the context of DN. We investigated the effect of AGEs on MIOX expression and delineated mechanisms that lead to tubulointerstitial injury. The status of MIOX, RAGE, and relevant cellular signaling pathways activated following AGE:RAGE interaction was examined in tubular cells and kidneys of AGE-BSA-treated mice. A solid-phase assay revealed an enhanced binding of RAGE with AGE-BSA, AGE-laminin, and AGE-collagen IV. The cells treated with AGE-BSA had increased MIOX activity/expression and promoter activity. This was associated with activation of various signaling kinases of phosphatidylinositol 3-kinase (PI3K)-AKT pathway and increased expression of NF-κB, transforming growth factor (TGF)-β, and fibronectin, which was negated with the treatment of MIOX/RAGE- small interfering (si) RNA. Concomitant with MIOX upregulation, there was an increased generation of reactive oxygen species (ROS), which could be abrogated with MIOX/RAGE- siRNA treatment. The kidneys of mice treated with AGE-BSA had significantly high urinary A/C ratio, upregulation of MIOX, RAGE and NF-κB, along with influx of monocytes into the tubulointerstitium, increased the expression of MCP-1, IL-6, and fibronectin and increased the generation of ROS. Such perturbations were abrogated with the concomitant treatment of inhibitors MIOX or RAGE (d-glucarate and FPS-ZM1). These studies support a role of AGE:RAGE interaction in the activation of PI3K-AKT pathway and upregulation of MIOX, with excessive generation of ROS, increased expression of NF-κB, inflammatory cytokines, TGF-β, and fibronectin. Collectively, these observations highlight the relevance of the biology of MIOX in the contribution toward tubulointerstitial injury in DN.
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Affiliation(s)
- Isha Sharma
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
| | - Rashmi S Tupe
- Biochemical Sciences Division, Rajiv Gandhi Institute of IT and Biotechnology, Bharati Vidyapeeth University , Pune , India
| | - Aryana K Wallner
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
| | - Yashpal S Kanwar
- Departments of Pathology and Medicine, Northwestern University , Chicago, Illinois
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40
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Bartlett CS, Scott RP, Carota IA, Wnuk ML, Kanwar YS, Miner JH, Quaggin SE. Glomerular mesangial cell recruitment and function require the co-receptor neuropilin-1. Am J Physiol Renal Physiol 2017; 313:F1232-F1242. [PMID: 28835419 DOI: 10.1152/ajprenal.00311.2017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 06/21/2017] [Revised: 08/08/2017] [Accepted: 08/16/2017] [Indexed: 01/11/2023] Open
Abstract
Proteinuria has been reported in cancer patients receiving agents that target the transmembrane receptor neuropilin-1 (Nrp1) suggesting potential adverse effects on glomerular function. Here we show that Nrp1 is highly expressed by mesangial cells and that genetic deletion of the Nrp1 gene from PDGF receptor-β+ mesangial cells results in proteinuric disease and glomerulosclerosis, leading to renal failure and death within 6 wk of age in mice. The major defect is a failure of mesangial cell migration that is required to establish the mature glomerular tuft. In vitro data show that the potent chemotactic effect of PDGFB is lost in Nrp1-deficient mesangial cells. Biochemical analyses reveal that Nrp1 is required for PDGFB-dependent phosphorylation of p130 Crk-associated substrate (p130Cas), a large-scaffold molecule that is involved in motility of other cell types. In stark contrast, matrix adhesion and activation of ERK and Akt, which mediate proliferation of mesangial cells in response to PDGFB, are unaffected by the absence of Nrp1. Taken together, these results identify a critical cell-autonomous role for Nrp1 in the migratory behavior of mesangial cells and may help explain the renal effects that occur in patients receiving Nrp1-inhibitory drugs.
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Affiliation(s)
- Christina S Bartlett
- Division of Nephrology and Hypertension and Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Rizaldy P Scott
- Division of Nephrology and Hypertension and Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada; and
| | - Isabel Anna Carota
- Division of Nephrology and Hypertension and Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Monika L Wnuk
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada; and
| | - Yashpal S Kanwar
- Division of Nephrology and Hypertension and Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Jeffrey H Miner
- Division of Nephrology, Washington University School of Medicine, St. Louis, Missouri
| | - Susan E Quaggin
- Division of Nephrology and Hypertension and Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois; .,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada; and
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41
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Yang S, Zhao L, Han Y, Liu Y, Chen C, Zhan M, Xiong X, Zhu X, Xiao L, Hu C, Liu F, Zhou Z, Kanwar YS, Sun L. Probucol ameliorates renal injury in diabetic nephropathy by inhibiting the expression of the redox enzyme p66Shc. Redox Biol 2017; 13:482-497. [PMID: 28728079 PMCID: PMC5514499 DOI: 10.1016/j.redox.2017.07.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 06/28/2017] [Accepted: 07/02/2017] [Indexed: 12/19/2022] Open
Abstract
AIMS Probucol is an anti-hyperlipidemic agent and a potent antioxidant drug that can delay progression of diabetic nephropathy (DN) and reverses renal oxidative stress in diabetic animal models; however, the mechanisms underlying these effects remain unclear. p66Shc is a newly recognized mediator of mitochondrial ROS production in renal cells under high-glucose (HG) ambience. We previously showed that p66Shc can serve as a biomarker for renal oxidative injury in DN patients and that p66Shc up-regulation is correlated with renal damage in vivo and in vitro. Here, we determined whether probucol ameliorates renal injury in DN by inhibiting p66Shc expression. RESULTS We found that the expression of SIRT1, Ac-H3 and p66Shc in kidneys of DN patients was altered. Also, probucol reduced the levels of serum creatinine, urine protein and LDL-c and attenuated renal oxidative injury and fibrosis in STZ induced diabetic mice. In addition, probucol reversed p-AMPK, SIRT1, Ac-H3 and p66Shc expression. Correlation analyses showed that p66Shc expression was correlated with p-AMPK and Sirt1 expression and severity of renal injury. In vitro pretreatment of HK-2 cells with p-AMPK and SIRT1 siRNA negated the beneficial effects of probucol. Furthermore, we noted that probucol activates p-AMPK and Sirt1 and inhibits p66shc mRNA transcription by facilitating the binding of Sirt1 to the p66Shc promoter and modulation of Ac-H3 expression in HK-2 cells under HG ambience. INNOVATION AND CONCLUSION Our results suggest for the first time that probucol ameliorates renal damage in DN by epigenetically suppressing p66Shc expression via the AMPK-SIRT1-AcH3 pathway.
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Affiliation(s)
- Shikun Yang
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China; Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Zhao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Yachun Han
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Yu Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Chao Chen
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Ming Zhan
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Xiaofen Xiong
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Xuejing Zhu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Li Xiao
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Chun Hu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Fuyou Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China
| | - Zhiguang Zhou
- Diabetes Center, and Institute of Metabolism and Endocrinology, Key Laboratory of Diabetes Immunology, Ministry of Education, China
| | - Yashpal S Kanwar
- Department of Pathology & Medicine, Northwestern University, Chicago, USA
| | - Lin Sun
- Department of Nephrology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Road, Changsha, Hunan 410011, China.
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Zwang NA, Ho B, Kanwar YS, Lewis B, Cusick M, Friedewald JJ, Gallon L. A case of atypical hemolytic uremic syndrome in a second renal transplant. J Nephrol 2017; 31:165-172. [PMID: 28224376 DOI: 10.1007/s40620-016-0373-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 08/30/2016] [Accepted: 12/22/2016] [Indexed: 01/29/2023]
Abstract
Atypical hemolytic uremic syndrome (aHUS) has gained increased visibility over several years as an important cause of renal failure. Unfortunately, diagnosis is often difficult because individual courses can be highly variable depending the causative genetic mutations. Here we present the case of a patient with a failed renal allograft and acute failure of a second allograft who was ultimately diagnosed with aHUS. Interestingly, he developed early de novo donor specific antibodies (DSA) after the second renal transplant in context of likely recurrent aHUS. Terminal complement inhibition with eculizumab resulted in prompt improvement of renal allograft function.
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Affiliation(s)
- Nicholas A Zwang
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, USA. .,McGaw Medical Center of Northwestern University, Chicago, USA. .,Northwestern Memorial Hospital/Arkes Family Pavilion Suite 1900, 676N. St. Clair, Chicago, IL, 60611, USA.
| | - Bing Ho
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern Memorial Hospital, Chicago, USA
| | | | - Matthew Cusick
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, USA
| | - John J Friedewald
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, USA.,McGaw Medical Center of Northwestern University, Chicago, USA.,Department of Pathology, Northwestern Memorial Hospital, Chicago, USA.,Machaon Diagnostics, Oakland, CA, USA.,Northwestern Memorial Hospital/Arkes Family Pavilion Suite 1900, 676N. St. Clair, Chicago, IL, 60611, USA
| | - Lorenzo Gallon
- Comprehensive Transplant Center, Northwestern University Feinberg School of Medicine, Chicago, USA
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43
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Sharma I, Dutta RK, Singh NK, Kanwar YS. High Glucose-Induced Hypomethylation Promotes Binding of Sp-1 to Myo-Inositol Oxygenase: Implication in the Pathobiology of Diabetic Tubulopathy. Am J Pathol 2017; 187:724-739. [PMID: 28208054 DOI: 10.1016/j.ajpath.2016.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 12/02/2016] [Accepted: 12/06/2016] [Indexed: 12/24/2022]
Abstract
The catabolic enzyme myo-inositol oxygenase (MIOX) is expressed in proximal tubules and up-regulated in the diabetic state. Previously, we reported its transcriptional and translation regulation by high glucose (HG), osmolytes, and fatty acids. However, its epigenetic regulation is unknown. Bisulfite sequencing revealed that both human and mouse MIOX promoters, enriched with CpG sites, are hypomethylated and unmethylated under HG ambience and hyperglycemic states associated with increased MIOX expression. Eletrophoretic mobility shift assays revealed increased binding of unmethylated oligos with nucleoproteins of cells maintained under HG. In addition, a strong binding of specificity protein (Sp)-1 transcription factor with MIOX promoter was observed under HG, especially with unmethylated Sp-1 oligo. Specificity of binding was established by supershift assays and treatment with the Sp-1 inhibitor mithramycin. Promoter analysis revealed an increase in luciferase activity under HG, which was reduced after mutation of the Sp-1-binding site. Sp1 siRNA treatment reduced mRNA and protein expression of Sp-1 and MIOX and generation of reactive oxygen species derived from NADPH oxidase (NOX)-4 and mitochondrial sources. In addition, there was reduced expression of hypoxia-inducible factor-1α relevant in the pathogenesis of diabetic nephropathy. Sp1 siRNA treatment reduced fibronectin expression, an extracellular matrix protein that is increased in diabetic nephropathy and tubulopathy. HG-induced MIOX expression was also reduced with the treatment of apelin-13, which deacetylates histones. Overall, these findings highlight the epigenetic regulation of MIOX in the pathogenesis of diabetic tubulopathy.
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Affiliation(s)
- Isha Sharma
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Rajesh K Dutta
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Neel K Singh
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Yashpal S Kanwar
- Department of Pathology, Northwestern University, Chicago, Illinois; Department of Medicine, Northwestern University, Chicago, Illinois.
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44
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Kavanagh D, McGlasson S, Jury A, Williams J, Scolding N, Bellamy C, Gunther C, Ritchie D, Gale DP, Kanwar YS, Challis R, Buist H, Overell J, Weller B, Flossmann O, Blunden M, Meyer EP, Krucker T, Evans SJW, Campbell IL, Jackson AP, Chandran S, Hunt DPJ. Type I interferon causes thrombotic microangiopathy by a dose-dependent toxic effect on the microvasculature. Blood 2016; 128:2824-2833. [PMID: 27663672 PMCID: PMC5159705 DOI: 10.1182/blood-2016-05-715987] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 08/30/2016] [Indexed: 02/08/2023] Open
Abstract
Many drugs have been reported to cause thrombotic microangiopathy (TMA), yet evidence supporting a direct association is often weak. In particular, TMA has been reported in association with recombinant type I interferon (IFN) therapies, with recent concern regarding the use of IFN in multiple sclerosis patients. However, a causal association has yet to be demonstrated. Here, we adopt a combined clinical and experimental approach to provide evidence of such an association between type I IFN and TMA. We show that the clinical phenotype of cases referred to a national center is uniformly consistent with a direct dose-dependent drug-induced TMA. We then show that dose-dependent microvascular disease is seen in a transgenic mouse model of IFN toxicity. This includes specific microvascular pathological changes seen in patient biopsies and is dependent on transcriptional activation of the IFN response through the type I interferon α/β receptor (IFNAR). Together our clinical and experimental findings provide evidence of a causal link between type I IFN and TMA. As such, recombinant type I IFN therapies should be stopped at the earliest stage in patients who develop this complication, with implications for risk mitigation.
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Affiliation(s)
- David Kavanagh
- National Renal Complement Therapeutics Centre, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Sarah McGlasson
- Medical Research Council Institute of Genetics and Molecular Medicine and
| | - Alexa Jury
- Medical Research Council Institute of Genetics and Molecular Medicine and
| | - Jac Williams
- Centre for Clinical Brain Sciences, Edinburgh University, Edinburgh, United Kingdom
| | - Neil Scolding
- Institute of Clinical Neurosciences, University of Bristol, Bristol, United Kingdom
| | - Chris Bellamy
- Department of Renal Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Claudia Gunther
- Department of Dermatology, University Hospital, Technical University Dresden, Dresden, Germany
| | - Diane Ritchie
- Centre for Clinical Brain Sciences, Edinburgh University, Edinburgh, United Kingdom
| | - Daniel P Gale
- Centre for Nephrology, Royal Free Hospital, University College London, London, United Kingdom
| | - Yashpal S Kanwar
- Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Rachel Challis
- National Renal Complement Therapeutics Centre, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Holly Buist
- Department of Cellular Pathology, Royal Victoria Hospital, Newcastle upon Tyne, United Kingdom
| | - James Overell
- Institute of Neurological Sciences, Glasgow University, Glasgow, United Kingdom
| | - Belinda Weller
- Centre for Clinical Brain Sciences, Edinburgh University, Edinburgh, United Kingdom
| | | | - Mark Blunden
- Barts and the London National Health Service Trust, London, United Kingdom
| | - Eric P Meyer
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | | | - Stephen J W Evans
- London School of Hygiene & Tropical Medicine, London, United Kingdom; and
| | - Iain L Campbell
- School of Molecular Bioscience, University of Sydney, Sydney, Australia
| | - Andrew P Jackson
- Medical Research Council Institute of Genetics and Molecular Medicine and
| | - Siddharthan Chandran
- Centre for Clinical Brain Sciences, Edinburgh University, Edinburgh, United Kingdom
| | - David P J Hunt
- Medical Research Council Institute of Genetics and Molecular Medicine and
- Centre for Clinical Brain Sciences, Edinburgh University, Edinburgh, United Kingdom
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45
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Dutta RK, Kondeti VK, Sharma I, Chandel NS, Quaggin SE, Kanwar YS. Beneficial Effects of Myo-Inositol Oxygenase Deficiency in Cisplatin-Induced AKI. J Am Soc Nephrol 2016; 28:1421-1436. [PMID: 27895157 PMCID: PMC5407728 DOI: 10.1681/asn.2016070744] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [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: 07/12/2016] [Accepted: 10/17/2016] [Indexed: 11/03/2022] Open
Abstract
Overexpression of the proximal tubular enzyme myo-inositol oxygenase (MIOX) induces oxidant stress in vitro However, the relevance of MIOX to tubular pathobiology remains enigmatic. To investigate the role of MIOX in cisplatin-induced tubular AKI, we generated conditional MIOX-overexpressing transgenic (MIOX-TG) mice and MIOX-knockout (MIOX-/-) mice with tubule-specific MIOX overexpression or knockout, respectively. Compared with cisplatin-treated wild-type (WT) mice, cisplatin-treated MIOX-TG mice had even greater increases in urea, creatinine, and KIM-1 levels and more tubular injury and apoptosis, but these effects were attenuated in cisplatin-treated MIOX-/- mice. Similarly, MIOX-TG mice had the highest and MIOX-/- mice had the lowest renal levels of Bax, cleaved caspase-3, and NADPH oxidase-4 expression and reactive oxygen species (ROS) generation after cisplatin treatment. In vitro, cisplatin dose-dependently increased ROS generation in LLC-PK1 cells. Furthermore, MIOX overexpression in these cells accentuated cisplatin-induced ROS generation and perturbations in the ratio of GSH to oxidized GSH, whereas MIOX-siRNA or N-acetyl cysteine treatment attenuated these effects. Additionally, the cisplatin-induced enhancement of p53 activation, NF-κB binding to DNA, and NF-κB nuclear translocation in WT mice was exacerbated in MIOX-TG mice but absent in MIOX-/- mice. In vitro, MIOX-siRNA or NAC treatment reduced the dose-dependent increase in p53 expression induced by cisplatin. We also observed a remarkable influx of inflammatory cells and upregulation of cytokines in kidneys of cisplatin-treated MIOX-TG mice. Finally, analysis of genomic DNA in WT mice revealed cisplatin-induced hypomethylation of the MIOX promoter. These data suggest that MIOX overexpression exacerbates, whereas MIOX gene disruption protects against, cisplatin-induced AKI.
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Affiliation(s)
| | | | | | | | | | - Yashpal S Kanwar
- Departments of Pathology and .,Medicine, Northwestern University, Chicago, Illinois
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46
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Jia Y, Chang HC, Schipma MJ, Liu J, Shete V, Liu N, Sato T, Thorp EB, Barger PM, Zhu YJ, Viswakarma N, Kanwar YS, Ardehali H, Thimmapaya B, Reddy JK. Cardiomyocyte-Specific Ablation of Med1 Subunit of the Mediator Complex Causes Lethal Dilated Cardiomyopathy in Mice. PLoS One 2016; 11:e0160755. [PMID: 27548259 PMCID: PMC4993490 DOI: 10.1371/journal.pone.0160755] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/25/2016] [Indexed: 11/19/2022] Open
Abstract
Mediator, an evolutionarily conserved multi-protein complex consisting of about 30 subunits, is a key component of the polymerase II mediated gene transcription. Germline deletion of the Mediator subunit 1 (Med1) of the Mediator in mice results in mid-gestational embryonic lethality with developmental impairment of multiple organs including heart. Here we show that cardiomyocyte-specific deletion of Med1 in mice (csMed1-/-) during late gestational and early postnatal development by intercrossing Med1fl/fl mice to α-MyHC-Cre transgenic mice results in lethality within 10 days after weaning due to dilated cardiomyopathy-related ventricular dilation and heart failure. The csMed1-/- mouse heart manifests mitochondrial damage, increased apoptosis and interstitial fibrosis. Global gene expression analysis revealed that loss of Med1 in heart down-regulates more than 200 genes including Acadm, Cacna1s, Atp2a2, Ryr2, Pde1c, Pln, PGC1α, and PGC1β that are critical for calcium signaling, cardiac muscle contraction, arrhythmogenic right ventricular cardiomyopathy, dilated cardiomyopathy and peroxisome proliferator-activated receptor regulated energy metabolism. Many genes essential for oxidative phosphorylation and proper mitochondrial function such as genes coding for the succinate dehydrogenase subunits of the mitochondrial complex II are also down-regulated in csMed1-/- heart contributing to myocardial injury. Data also showed up-regulation of about 180 genes including Tgfb2, Ace, Atf3, Ctgf, Angpt14, Col9a2, Wisp2, Nppa, Nppb, and Actn1 that are linked to cardiac muscle contraction, cardiac hypertrophy, cardiac fibrosis and myocardial injury. Furthermore, we demonstrate that cardiac specific deletion of Med1 in adult mice using tamoxifen-inducible Cre approach (TmcsMed1-/-), results in rapid development of cardiomyopathy and death within 4 weeks. We found that the key findings of the csMed1-/- studies described above are highly reproducible in TmcsMed1-/- mouse heart. Collectively, these observations suggest that Med1 plays a critical role in the maintenance of heart function impacting on multiple metabolic, compensatory and reparative pathways with a likely therapeutic potential in the management of heart failure.
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MESH Headings
- Animals
- Apoptosis
- Cadherins/genetics
- Cadherins/metabolism
- Calcium Channels, L-Type/genetics
- Calcium Channels, L-Type/metabolism
- Calcium Signaling
- Cardiomyopathy, Dilated/genetics
- Cardiomyopathy, Dilated/metabolism
- Cardiomyopathy, Dilated/pathology
- Cyclic Nucleotide Phosphodiesterases, Type 1/genetics
- Cyclic Nucleotide Phosphodiesterases, Type 1/metabolism
- Embryo, Mammalian
- Energy Metabolism
- Female
- Gene Deletion
- Gene Expression Profiling
- Gene Expression Regulation
- Genes, Lethal
- Gestational Age
- Heart Failure/genetics
- Heart Failure/metabolism
- Heart Failure/pathology
- Mediator Complex Subunit 1/deficiency
- Mediator Complex Subunit 1/genetics
- Mice
- Mice, Knockout
- Mitochondria/metabolism
- Mitochondria/pathology
- Myocardial Contraction
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Peroxisome Proliferator-Activated Receptors/genetics
- Peroxisome Proliferator-Activated Receptors/metabolism
- Pregnancy
- Ryanodine Receptor Calcium Release Channel/genetics
- Ryanodine Receptor Calcium Release Channel/metabolism
- Sarcoplasmic Reticulum Calcium-Transporting ATPases/genetics
- Sarcoplasmic Reticulum Calcium-Transporting ATPases/metabolism
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Affiliation(s)
- Yuzhi Jia
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hsiang-Chun Chang
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Matthew J. Schipma
- Next Generation Sequencing Core Facility, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Jing Liu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Varsha Shete
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Ning Liu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Tatsuya Sato
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Edward B. Thorp
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Philip M. Barger
- Center for Cardiovascular Research, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Yi-Jun Zhu
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Navin Viswakarma
- Department of Surgery, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Yashpal S. Kanwar
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Hossein Ardehali
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Bayar Thimmapaya
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- * E-mail: (JKR); (BT)
| | - Janardan K. Reddy
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- * E-mail: (JKR); (BT)
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47
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Xu X, Zhu X, Ma M, Han Y, Hu C, Yuan S, Yang Y, Xiao L, Liu F, Kanwar YS, Sun L. p66Shc: A novel biomarker of tubular oxidative injury in patients with diabetic nephropathy. Sci Rep 2016; 6:29302. [PMID: 27377870 PMCID: PMC4932503 DOI: 10.1038/srep29302] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 06/17/2016] [Indexed: 12/15/2022] Open
Abstract
Increased p66Shc expression has been associated with diabetic nephropathy (DN). However, whether p66Shc can serve as a potential biomarker for tubular oxidative injury in DN is unknown. We measured the expression of p66Shc in peripheral blood monocytes (PBMs) and renal biopsy tissues from DN patients and then analysed the relationship between p66Shc expression and the clinical characteristics of patients with DN. Patients were divided into 4 groups (class IIa, class IIb, class III and the control group). qPCR, Western blotting and immunohistochemistry were performed. The results showed that both p66Shc and p-p66Shc expression significantly increased in PBMs and kidney tissues of DN patients. Moreover, Spearman’s correlation and multiple regression analyses were carried out. A positive relationship between the p66Shc expression and oxidative stress was found. p66Shc and oxidative stress were significant predictors of the degree of tubular damage. In addition, p66Shc expression was positively correlated with the concentrations of β-NAG, UACR and 8-OHdG, low-density lipoprotein and blood glucose levels, and duration of diabetes in patients with DN from class IIa to class III. These data indicated that increased expression of p66Shc may serve as a therapeutic target and a novel biomarker of DN.
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Affiliation(s)
- Xiaoxuan Xu
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xuejing Zhu
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mingming Ma
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yachun Han
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chun Hu
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Shuguang Yuan
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuan Yang
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Li Xiao
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Fuyou Liu
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yashpal S Kanwar
- Departments of Pathology &Medicine, Northwestern University, Chicago, USA
| | - Lin Sun
- Department of Nephrology, 2nd Xiangya Hospital, Central South University, Changsha, Hunan, China
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48
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Hu C, Sun L, Xiao L, Han Y, Fu X, Xiong X, Xu X, Liu Y, Yang S, Liu F, Kanwar YS. Insights into the Mechanisms Involved in the Expression and Regulation of Extracellular Matrix Proteins in Diabetic Nephropathy. Curr Med Chem 2016; 22:2858-70. [PMID: 26119175 DOI: 10.2174/0929867322666150625095407] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 06/15/2015] [Accepted: 06/24/2015] [Indexed: 02/06/2023]
Abstract
Diabetic Nephropathy (DN) is believed to be a major microvascular complication of diabetes. The hallmark of DN includes deposition of Extracellular Matrix (ECM) proteins, such as, collagen, laminin and fibronectin in the mesangium and renal tubulo-interstitium of the glomerulus and basement membranes. Such an increased expression of ECM leads to glomerular and tubular basement membranes thickening and increase of mesangial matrix, ultimately resulting in glomerulosclerosis and tubulointerstitial fibrosis. The characteristic morphologic glomerular mesangial lesion has been described as Kimmelstiel-Wilson nodule, and the process at times is referred to as diabetic nodular glomerulosclerosis. Thus, the accumulation of ECM proteins plays a critical role in the development of DN. The relevant mechanism(s) involved in the increased ECM expression and their regulation in the kidney in diabetic state has been extensively investigated and documented in the literature. Nevertheless, there are certain other mechanisms that may yet be conclusively defined. Recent studies demonstrated that some of the new signaling pathways or molecules including, Notch, Wnt, mTOR, TLRs and small GTPase may play a pivotal role in the modulation of ECM regulation and expression in DN. Such modulation could be operational for instance Notch through Notch1/Jagged1 signaling, Wnt by Wnt/β- catenin pathway and mTOR via PI3-K/Akt/mTOR signaling pathways. All these pathways may be critical in the modulation of ECM expression and tubulo-interstitial fibrosis. In addition, TLRs, mainly the TLR2 and TLR4, by TLR2- dependent and TGF-β-dependent conduits, may modulate ECM expression and generate a fibrogenic response. Small GTPase like Rho, Ras and Rab family by targeting relevant genes may also influence the accumulation of ECM proteins and renal fibrosis in hyperglycemic states. This review summarizes the recent information about the role and mechanisms by which these molecules and signaling pathways regulate ECM synthesis and its expression in high glucose ambience in vitro and in vivo states. The understanding of such signaling pathways and the molecules that influence expression, secretion and amassing of ECM may aid in developing strategies for the amelioration of diabetic nephropathy.
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Affiliation(s)
| | - L Sun
- Department of Nephrology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
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49
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Sun L, Dutta RK, Xie P, Kanwar YS. myo-Inositol Oxygenase Overexpression Accentuates Generation of Reactive Oxygen Species and Exacerbates Cellular Injury following High Glucose Ambience: A NEW MECHANISM RELEVANT TO THE PATHOGENESIS OF DIABETIC NEPHROPATHY. J Biol Chem 2016; 291:5688-5707. [PMID: 26792859 DOI: 10.1074/jbc.m115.669952] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Indexed: 01/23/2023] Open
Abstract
Diabetic nephropathy (DN) is characterized by perturbations in metabolic/cellular signaling pathways with generation of reactive oxygen species (ROS). The ROS are regarded as a common denominator of various pathways, and they inflict injury on renal glomerular cells. Recent studies indicate that tubular pathobiology also plays a role in the progression of DN. However, the mechanism(s) for how high (25 mm) glucose (HG) ambience induces tubular damage remains enigmatic. myo-Inositol oxygenase (MIOX) is a tubular enzyme that catabolizes myo-inositol to d-glucuronate via the glucuronate-xylulose (G-X) pathway. In this study, we demonstrated that G-X pathway enzymes are expressed in the kidney, and MIOX expression/bioactivity was up-regulated under HG ambience in LLC-PK1 cells, a tubular cell line. We further investigated whether MIOX overexpression leads to accentuation of tubulo-interstitial injury, as gauged by some of the parameters relevant to the progression of DN. Under HG ambience, MIOX overexpression accentuated redox imbalance, perturbed NAD(+)/NADH ratios, increased ROS generation, depleted reduced glutathione, reduced GSH/GSSG ratio, and enhanced adaptive changes in the profile of the antioxidant defense system. These changes were also accompanied by mitochondrial dysfunctions, DNA damage and induction of apoptosis, accentuated activity of profibrogenic cytokine, and expression of fibronectin, the latter two being the major hallmarks of DN. These perturbations were largely blocked by various ROS inhibitors (Mito Q, diphenyleneiodonium chloride, and N-acetylcysteine) and MIOX/NOX4 siRNA. In conclusion, this study highlights a novel mechanism where MIOX under HG ambience exacerbates renal injury during the progression of diabetic nephropathy following the generation of excessive ROS via an unexplored G-X pathway.
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Affiliation(s)
- Lin Sun
- From the Department of Nephrology and Renal Institute, 2nd Xiangya Hospital, Central South University, Changsha, Hunan 410011, China and
| | - Rajesh K Dutta
- the Departments of Pathology and Medicine, Northwestern University, Chicago, Illinois 60611
| | - Ping Xie
- the Departments of Pathology and Medicine, Northwestern University, Chicago, Illinois 60611
| | - Yashpal S Kanwar
- the Departments of Pathology and Medicine, Northwestern University, Chicago, Illinois 60611.
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Nagasu H, Satoh M, Kiyokage E, Kidokoro K, Toida K, Channon KM, Kanwar YS, Sasaki T, Kashihara N. Activation of endothelial NAD(P)H oxidase accelerates early glomerular injury in diabetic mice. J Transl Med 2016; 96:25-36. [PMID: 26552047 PMCID: PMC4874489 DOI: 10.1038/labinvest.2015.128] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 09/12/2015] [Accepted: 09/18/2015] [Indexed: 11/09/2022] Open
Abstract
Increased generation of reactive oxygen species (ROS) is a common denominative pathogenic mechanism underlying vascular and renal complications in diabetes mellitus. Endothelial NAD(P)H oxidase is a major source of vascular ROS, and it has an important role in endothelial dysfunction. We hypothesized that activation of endothelial NAD(P)H oxidase initiates and worsens the progression of diabetic nephropathy, particularly in the development of albuminuria. We used transgenic mice with endothelial-targeted overexpression of the catalytic subunit of NAD(P)H oxidase, Nox2 (NOX2TG). NOX2TG mice were crossed with Akita insulin-dependent diabetic (Akita) mice that develop progressive hyperglycemia. We compared the progression of diabetic nephropathy in Akita versus NOX2TG-Akita mice. NOX2TG-Akita mice and Akita mice developed significant albuminuria above the baseline at 6 and 10 weeks of age, respectively. Compared with Akita mice, NOX2TG-Akita mice exhibited higher levels of NAD(P)H oxidase activity in glomeruli, developed glomerular endothelial perturbations, and attenuated expression of glomerular glycocalyx. Moreover, in contrast to Akita mice, the NOX2TG-Akita mice had numerous endothelial microparticles (blebs), as detected by scanning electron microscopy, and increased glomerular permeability. Furthermore, NOX2TG-Akita mice exhibited distinct phenotypic changes in glomerular mesangial cells expressing α-smooth muscle actin, and in podocytes expressing increased levels of desmin, whereas the glomeruli generated increased levels of ROS. In conclusion, activation of endothelial NAD(P)H oxidase in the presence of hyperglycemia initiated and exacerbated diabetic nephropathy characterized by the development of albuminuria. Moreover, ROS generated in the endothelium compounded glomerular dysfunctions by altering the phenotypes of mesangial cells and compromising the integrity of the podocytes.
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Affiliation(s)
- Hajime Nagasu
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Minoru Satoh
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Emi Kiyokage
- Department of Anatomy, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Kengo Kidokoro
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Kazunori Toida
- Department of Anatomy, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Keith M Channon
- Department of Cardiovascular Medicine, University of Oxford, Oxford, UK
| | - Yashpal S Kanwar
- Department of Pathology and Medicine, Northwestern University, Chicago, IL, USA
| | - Tamaki Sasaki
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Naoki Kashihara
- Department of Nephrology and Hypertension, Kawasaki Medical School, Kurashiki, Okayama, Japan
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