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Cao C, Wei S, He L, Li C, Lu Y, Sun W, Wang Y. Temporal alteration of serum bilirubin levels and its renoprotective effects in diabetic kidney disease: exploring the hormonal mechanisms. Front Endocrinol (Lausanne) 2024; 15:1361840. [PMID: 38756998 PMCID: PMC11097656 DOI: 10.3389/fendo.2024.1361840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 04/18/2024] [Indexed: 05/18/2024] Open
Abstract
Objective This current study represents a novel endeavor to scrutinize the correlation between the temporal alteration in serum total bilirubin (TBIL) concentrations and the rate of estimated glomerular filtration rate (eGFR). Additionally, this study aims to probe the plausible molecular mechanism underpinning the renoprotective effects of bilirubin concerning its hormonal characteristics. Materials and methods In this study, a cohort of 103 patients diagnosed with DKD and receiving medical care at Dongzhimen Hospital were recruited and monitored over a period of 2-7 years. The progression of DKD was ascertained using a threshold of eGFR decline > -5.48%/year. To assess the relationship between the annual change in serum TBIL levels (%/year) and the slope of eGFR, multivariate binary logistic regression analysis was employed. Furthermore, the ROC curve analysis was employed to determine the cut-off value for TBIL levels (%/year). Results The use of multivariate binary logistic regression models revealed that serum TBIL levels (%/year) exhibited a significant correlation with the slope of eGFR. Moreover, the ROC curve analysis indicated a cut-off value of -6.729%/year for TBIL levels (%/year) with a sensitivity of 0.75 and specificity of 0.603, in diagnosing eGFR decline >-5.48%/year. Conclusions The findings of this study suggest that the sustained elevation of serum bilirubin concentration within the physiological range can effectively retard the progression of Diabetic Kidney Disease (DKD). Furthermore, the hormonal attributes of bilirubin may underlie its renoprotective effects.
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Affiliation(s)
- Can Cao
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Shuwu Wei
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Leijuan He
- Department of Traditional Chinese Medicine, Dadushe Community Health Service Center, Beijing, China
| | - Chunyao Li
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Yizhen Lu
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Weiwei Sun
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Yaoxian Wang
- Department of Nephrology and Endocrinology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
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Lin DW, Yang TM, Ho C, Shih YH, Lin CL, Hsu YC. Targeting Macrophages: Therapeutic Approaches in Diabetic Kidney Disease. Int J Mol Sci 2024; 25:4350. [PMID: 38673935 PMCID: PMC11050450 DOI: 10.3390/ijms25084350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Diabetes is not solely a metabolic disorder but also involves inflammatory processes. The immune response it incites is a primary contributor to damage in target organs. Research indicates that during the initial phases of diabetic nephropathy, macrophages infiltrate the kidneys alongside lymphocytes, initiating a cascade of inflammatory reactions. The interplay between macrophages and other renal cells is pivotal in the advancement of kidney disease within a hyperglycemic milieu. While M1 macrophages react to the inflammatory stimuli induced by elevated glucose levels early in the disease progression, their subsequent transition to M2 macrophages, which possess anti-inflammatory and tissue repair properties, also contributes to fibrosis in the later stages of nephropathy by transforming into myofibroblasts. Comprehending the diverse functions of macrophages in diabetic kidney disease and regulating their activity could offer therapeutic benefits for managing this condition.
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Affiliation(s)
- Da-Wei Lin
- Department of Internal Medicine, St. Martin De Porres Hospital, Chiayi City 60069, Taiwan;
| | - Tsung-Ming Yang
- Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33303, Taiwan;
| | - Cheng Ho
- Division of Endocrinology and Metabolism, Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
| | - Ya-Hsueh Shih
- Departments of Nephrology, Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- Kidney and Diabetic Complications Research Team (KDCRT), Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
| | - Chun-Liang Lin
- School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33303, Taiwan;
- Departments of Nephrology, Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- Kidney and Diabetic Complications Research Team (KDCRT), Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- Kidney Research Center, Chang Gung Memorial Hospital, Taipei 10507, Taiwan
- Center for Shockwave Medicine and Tissue Engineering, Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Yung-Chien Hsu
- Departments of Nephrology, Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- Kidney and Diabetic Complications Research Team (KDCRT), Chang Gung Memorial Hospital, Chiayi County 61363, Taiwan
- School of Medicine, College of Medicine, Chang Gung University, Taoyuan 33303, Taiwan
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Chen JS, Xie PF, Feng H. The role of exercise in improving hyperlipidemia-renal injuries induced by a high-fat diet: a literature review. PeerJ 2023; 11:e15435. [PMID: 37283893 PMCID: PMC10239619 DOI: 10.7717/peerj.15435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/27/2023] [Indexed: 06/08/2023] Open
Abstract
A diet that is high in sugar and fat is a precursor to various chronic diseases, especially hyperlipidemia. Patients with hyperlipidemia have increased levels of plasma free fatty acids and an ectopic accumulation of lipids. The kidney is one of the main organs affected by this disease and, recently, there have been more studies conducted on renal injury caused by hyperlipidemia. The main pathological mechanism is closely related to renal lipotoxicity. However, in different kidney cells, the reaction mechanism varies due to the different affinities of the lipid receptors. At present, it is believed that in addition to lipotoxicity, hyperlipidemia induced-renal injury is also closely related to oxidative stress, endoplasmic reticulum stress, and inflammatory reactions, which are the result of multiple factors. Exercise plays an important role in the prevention of various chronic diseases and recently emerging researches indicated its positive effects to renal injury caused by hyperlipidemia. However, there are few studies summarizing the effects of exercise on this disease and the specific mechanisms need to be further explored. This article summarizes the mechanisms of hyperlipidemia induced-renal injury at the cellular level and discusses the ways in which exercise may regulate it. The results provide theoretical support and novel approaches for identifying the intervention target to treat hyperlipidemia induced-renal injury.
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Affiliation(s)
- Jun Shunzi Chen
- Institute of Exercise and Health, Tianjin University of Sport, Tianjin, Tianjin, China
- Institute of Physical Education, Guiyang University, Guiyang, Guizhou, China
| | - Peng Fei Xie
- Guizhou Institute of Sports Science, Guiyang, Guizhou, China
| | - Hong Feng
- Institute of Exercise and Health, Tianjin University of Sport, Tianjin, Tianjin, China
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Zheng X, Higdon L, Gaudet A, Shah M, Balistieri A, Li C, Nadai P, Palaniappan L, Yang X, Santo B, Ginley B, Wang XX, Myakala K, Nallagatla P, Levi M, Sarder P, Rosenberg A, Maltzman JS, de Freitas Caires N, Bhalla V. Endothelial Cell-Specific Molecule-1 Inhibits Albuminuria in Diabetic Mice. KIDNEY360 2022; 3:2059-2076. [PMID: 36591362 PMCID: PMC9802554 DOI: 10.34067/kid.0001712022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/19/2022] [Indexed: 01/13/2023]
Abstract
Background Diabetic kidney disease (DKD) is the most common cause of kidney failure in the world, and novel predictive biomarkers and molecular mechanisms of disease are needed. Endothelial cell-specific molecule-1 (Esm-1) is a secreted proteoglycan that attenuates inflammation. We previously identified that a glomerular deficiency of Esm-1 associates with more pronounced albuminuria and glomerular inflammation in DKD-susceptible relative to DKD-resistant mice, but its contribution to DKD remains unexplored. Methods Using hydrodynamic tail-vein injection, we overexpress Esm-1 in DKD-susceptible DBA/2 mice and delete Esm-1 in DKD-resistant C57BL/6 mice to study the contribution of Esm-1 to DKD. We analyze clinical indices of DKD, leukocyte infiltration, podocytopenia, and extracellular matrix production. We also study transcriptomic changes to assess potential mechanisms of Esm-1 in glomeruli. Results In DKD-susceptible mice, Esm-1 inversely correlates with albuminuria and glomerular leukocyte infiltration. We show that overexpression of Esm-1 reduces albuminuria and diabetes-induced podocyte injury, independent of changes in leukocyte infiltration. Using a complementary approach, we find that constitutive deletion of Esm-1 in DKD-resistant mice modestly increases the degree of diabetes-induced albuminuria versus wild-type controls. By glomerular RNAseq, we identify that Esm-1 attenuates expression of kidney disease-promoting and interferon (IFN)-related genes, including Ackr2 and Cxcl11. Conclusions We demonstrate that, in DKD-susceptible mice, Esm-1 protects against diabetes-induced albuminuria and podocytopathy, possibly through select IFN signaling. Companion studies in patients with diabetes suggest a role of Esm-1 in human DKD.
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Affiliation(s)
- Xiaoyi Zheng
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Lauren Higdon
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
- Veterans Affairs Palo Alto Heath Care System, Palo Alto, California
| | - Alexandre Gaudet
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1019-UMR9017-Center for Infection & Immunity of Lille, Pasteur Institute of Lille, University of Lille, Lille, France
| | - Manav Shah
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Angela Balistieri
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Catherine Li
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Patricia Nadai
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1019-UMR9017-Center for Infection & Immunity of Lille, Pasteur Institute of Lille, University of Lille, Lille, France
| | - Latha Palaniappan
- Division of Primary Care and Population Health, Stanford University School of Medicine, Stanford, California
| | - Xiaoping Yang
- Division of Kidney-Urologic Pathology, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Briana Santo
- Department of Pathology and Anatomical Sciences, University at Buffalo–The State University of New York, Buffalo, New York
| | - Brandon Ginley
- Department of Pathology and Anatomical Sciences, University at Buffalo–The State University of New York, Buffalo, New York
| | - Xiaoxin X. Wang
- Department of Biochemistry, Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC
| | - Komuraiah Myakala
- Department of Biochemistry, Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC
| | | | - Moshe Levi
- Department of Biochemistry, Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC
| | - Pinaki Sarder
- Department of Pathology and Anatomical Sciences, University at Buffalo–The State University of New York, Buffalo, New York
| | - Avi Rosenberg
- Division of Kidney-Urologic Pathology, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jonathan S. Maltzman
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
- Veterans Affairs Palo Alto Heath Care System, Palo Alto, California
| | - Nathalie de Freitas Caires
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1019-UMR9017-Center for Infection & Immunity of Lille, Pasteur Institute of Lille, University of Lille, Lille, France
- Biothelis, Lille, France
| | - Vivek Bhalla
- Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
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Lin Z, Wan X, Zhang T, Huo H, Zhang X, Li K, Bei W, Guo J, Yang Y. Trefoil factor 3: New highlights in chronic kidney disease research. Cell Signal 2022; 100:110470. [PMID: 36122885 DOI: 10.1016/j.cellsig.2022.110470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/10/2022] [Accepted: 09/13/2022] [Indexed: 11/28/2022]
Abstract
Trefoil factor 3 (TFF3, also known as intestinal trefoil factor) is a small-molecule peptide containing a typical trefoil structure. TFF3 has several biological effects, such as wound healing, immune regulation, neuroprotection, and cell migration and proliferation promotion. Although TFF3 binding sites were identified in rat kidneys more than a decade ago, the specific effects of this small-molecule peptide on kidneys remain unclear. Until recently, much of the research on TFF3 in the kidney field has focused exclusively on its role as a biomarker. Notably, a large prospective randomized study of patients with 29 common clinical diseases revealed that chronic kidney disease (CKD) was associated with the highest serum TFF3 levels, which were 3-fold higher than in acute gastroenteritis, which had the second-highest levels. Examination of each stage of CKD revealed that urine and serum TFF3 levels significantly increased with the progression of CKD. These results suggest that the role of TFF3 in CKD needs further research. The present review summarizes the renal physiological expression, biological functions, and downstream signaling of TFF3, as well as the upstream events that lead to high expression of TFF3 in CKD.
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Affiliation(s)
- Ziyang Lin
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Xiaofen Wan
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Tao Zhang
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Hongyan Huo
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Xiaoyu Zhang
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Kunping Li
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Weijian Bei
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Jiao Guo
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China
| | - Yiqi Yang
- Key Laboratory of Glucolipid Metabolic Diseases of the Ministry of Education, Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, Guangdong Pharmaceutical University, Science and Technology Building, 280 Waihuan East Road, Guangzhou Higher Education Mega, Guangzhou, China.
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6
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Li HD, You YK, Shao BY, Wu WF, Wang YF, Guo JB, Meng XM, Chen H. Roles and crosstalks of macrophages in diabetic nephropathy. Front Immunol 2022; 13:1015142. [PMID: 36405700 PMCID: PMC9666695 DOI: 10.3389/fimmu.2022.1015142] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 10/20/2022] [Indexed: 11/05/2022] Open
Abstract
Diabetic nephropathy (DN) is the most common chronic kidney disease. Accumulation of glucose and metabolites activates resident macrophages in kidneys. Resident macrophages play diverse roles on diabetic kidney injuries by releasing cytokines/chemokines, recruiting peripheral monocytes/macrophages, enhancing renal cell injuries (podocytes, mesangial cells, endothelial cells and tubular epithelial cells), and macrophage-myofibroblast transition. The differentiation and cross-talks of macrophages ultimately result renal inflammation and fibrosis in DN. Emerging evidence shows that targeting macrophages by suppressing macrophage activation/transition, and macrophages-cell interactions may be a promising approach to attenuate DN. In the review, we summarized the diverse roles of macrophages and the cross-talks to other cells in DN, and highlighted the therapeutic potentials by targeting macrophages.
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Affiliation(s)
- Hai-Di Li
- Department of Chinese Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-inflammatory of Immune Medicines, Ministry of Education, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Yong-Ke You
- Department of Nephrology, Shenzhen University General Hospital, Shenzhen University, Shenzhen, Guangdong, China
| | - Bao-Yi Shao
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Wei-Feng Wu
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Yi-Fan Wang
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Jian-Bo Guo
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Xiao-Ming Meng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, The Key Laboratory of Anti-inflammatory of Immune Medicines, Ministry of Education, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
- *Correspondence: Haiyong Chen, ; Xiao-Ming Meng,
| | - Haiyong Chen
- Department of Chinese Medicine, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
- *Correspondence: Haiyong Chen, ; Xiao-Ming Meng,
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Ren Q, Cheng L, Yi J, Ma L, Pan J, Gou SJ, Fu P. Toll-like Receptors as Potential Therapeutic Targets in Kidney Diseases. Curr Med Chem 2020; 27:5829-5854. [PMID: 31161985 DOI: 10.2174/0929867325666190603110907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/15/2019] [Accepted: 05/13/2019] [Indexed: 02/08/2023]
Abstract
Toll-like Receptors (TLRs) are members of pattern recognition receptors and serve a pivotal role in host immunity. TLRs response to pathogen-associated molecular patterns encoded by pathogens or damage-associated molecular patterns released by dying cells, initiating an inflammatory cascade, where both beneficial and detrimental effects can be exerted. Accumulated evidence has revealed that TLRs are closely associated with various kidney diseases but their roles are still not well understood. This review updated evidence on the roles of TLRs in the pathogenesis of kidney diseases including urinary tract infection, glomerulonephritis, acute kidney injury, transplant allograft dysfunction and chronic kidney diseases.
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Affiliation(s)
- Qian Ren
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Lu Cheng
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jing Yi
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Liang Ma
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jing Pan
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Shen-Ju Gou
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Ping Fu
- Kidney Research Laboratory, Division of Nephrology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu 610041, China
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8
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Efficacy of continuous erythropoietin receptor activator for end-stage renal disease patients with renal anemia before and after peritoneal dialysis initiation. Clin Exp Nephrol 2020; 25:191-199. [PMID: 33025233 PMCID: PMC7880977 DOI: 10.1007/s10157-020-01973-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 09/15/2020] [Indexed: 11/09/2022]
Abstract
Background Serial management of renal anemia using continuous erythropoietin receptor activator (CERA) throughout the peritoneal dialysis initiation period has rarely been reported. We investigated the efficacy and dosage of CERA treatment from pre- to post-peritoneal dialysis initiation for anemia management in patients with end-stage renal disease. Methods Twenty-six patients (13 men; mean age 60.9 years) who started peritoneal dialysis between April 2012 and April 2018 were investigated. Serial changes in hemoglobin levels, transferrin saturation and ferritin levels, CERA dosage, and the erythropoietin resistance index (ERI) over a 48 week period were retrospectively examined. Results Mean hemoglobin levels increased significantly from 10.5 g/dL at 24 weeks prior to the peritoneal dialysis initiation to 11.5 g/dL at 4 weeks post-initiation. The proportion of patients with hemoglobin levels ≥ 11 g/dL increased significantly after peritoneal dialysis initiation. The mean CERA dosage was 57.0 µg/month at 24 weeks prior to dialysis initiation, 86.5 µg/month at initiation, and 72.0 µg/month at 4 weeks post-initiation. Thus, the dosage tended to increase immediately before peritoneal dialysis initiation and then decreased thereafter. Hemoglobin levels were significantly lower, while the CERA dosage for maintaining hemoglobin levels and ERI tended to be higher at dialysis initiation in patients with diabetes than in those without diabetes. Conclusion Treatment with CERA prior to and during the peritoneal dialysis initiation achieved fairly good anemia management in patients with and without diabetes. The CERA dosage could be reduced in patients without diabetes after dialysis initiation. Electronic supplementary material The online version of this article (10.1007/s10157-020-01973-x) contains supplementary material, which is available to authorized users.
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9
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Fujimoto D, Kuwabara T, Hata Y, Umemoto S, Kanki T, Nishiguchi Y, Mizumoto T, Hayata M, Kakizoe Y, Izumi Y, Takahashi S, Mukoyama M. Suppressed ER-associated degradation by intraglomerular cross talk between mesangial cells and podocytes causes podocyte injury in diabetic kidney disease. FASEB J 2020; 34:15577-15590. [PMID: 32996639 DOI: 10.1096/fj.202000078rr] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 09/14/2020] [Accepted: 09/21/2020] [Indexed: 12/21/2022]
Abstract
Mesangial lesions and podocyte injury are essential manifestations of the progression of diabetic kidney disease (DKD). Although cross-communication between mesangial cells (MCs) and podocytes has recently been suggested by the results of single-nucleus RNA sequencing analyses, the molecular mechanisms and role in disease progression remain elusive. Our cDNA microarray data of diabetic mouse glomeruli suggested the involvement of endoplasmic reticulum (ER) stress in DKD pathophysiology. In vitro experiments revealed the suppression of the ER-associated degradation (ERAD) pathway and induction of apoptosis in podocytes that were stimulated with the supernatant of MCs cultured in high glucose conditions. In diabetic mice, ERAD inhibition resulted in exacerbated albuminuria, increased apoptosis in podocytes, and reduced nephrin expression associated with the downregulation of ERAD-related biomolecules. Flow cytometry analysis of podocytes isolated from MafB (a transcription factor known to be expressed in macrophages and podocytes)-GFP knock-in mice revealed that ERAD inhibition resulted in decreased nephrin phosphorylation. These findings suggest that an intraglomerular cross talk between MCs and podocytes can inhibit physiological ERAD processes and suppress the phosphorylation of nephrin in podocytes, which thereby lead to podocyte injury under diabetic conditions. Therapeutic intervention of the ERAD pathway through the cross talk between these cells is potentially a novel strategy for DKD.
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Affiliation(s)
- Daisuke Fujimoto
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Takashige Kuwabara
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yusuke Hata
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Shuro Umemoto
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Tomoko Kanki
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yoshihiko Nishiguchi
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Teruhiko Mizumoto
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Manabu Hayata
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yutaka Kakizoe
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yuichiro Izumi
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Satoru Takahashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masashi Mukoyama
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
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10
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Ming Y, Ma QH, Han XL, Li HY. Molecular hydrogen improves type 2 diabetes through inhibiting oxidative stress. Exp Ther Med 2020; 20:359-366. [PMID: 32537002 PMCID: PMC7291681 DOI: 10.3892/etm.2020.8708] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 03/19/2020] [Indexed: 12/19/2022] Open
Abstract
The aim of the present study was to investigate the potential therapeutic effects of molecular hydrogen on type 2 diabetes mellitus (T2DM) in rats. Following maintenance on a high-fat diet for 4 weeks, a T2DM model was established using an injection of 30 mg/kg streptozotocin via the caudal vein into Sprague-Dawley rats. On day 0 and Day 80, the blood samples were obtained from each rat for the measurement of biochemical indicators including blood lipids, fasting blood glucose, hepatic glycogen, fasting serum insulin, insulin sensitivity index, insulin resistance index, serum superoxide dismutase (SOD) and serum malondialdehyde (MDA) using an automatic biochemical analyzer. The kidneys and pancreas tissues were harvested for HE staining and Western blot assay of toll-like receptor 4 (TLR4), myeloid differentiation primary response 88 (MyD88), phosphorylated (p)-p65, p65, p-IκB and IκB. The results showed that in rats with T2DM, molecular hydrogen treatment decreased fasting blood glucose levels, increased hepatic glycogen synthesis and improved insulin sensitivity. Treatment with molecular hydrogen also increased the production of SOD whilst decreasing the production of MDA. In addition, molecular hydrogen alleviated the pathological changes exhibited by pancreatic islets and kidney during T2DM. Mechanistically, molecular hydrogen decreased TLR4 and MyD88 expression levels whilst also decreasing p65 and NF-κB inhibitor phosphorylation. In conclusion, molecular hydrogen exerted therapeutic effects against T2DM by improving hyperglycemia and inhibiting oxidative stress through mechanisms that are associated with the TLR4/MyD88/NF-κB signaling pathway.
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Affiliation(s)
- Yi Ming
- Department of Endocrinology, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
| | - Qi-Hang Ma
- Department of Endocrinology, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
| | - Xin-Li Han
- Department of Encephalopathy, Weifang Hospital of Traditional Chinese Medicine, Weifang, Shandong 261000, P.R. China
| | - Hong-Yan Li
- Department of Endocrinology, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
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11
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The predictive role of serum calprotectin on mortality in hemodialysis patients with high phosphoremia. BMC Nephrol 2020; 21:158. [PMID: 32366231 PMCID: PMC7197146 DOI: 10.1186/s12882-020-01812-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/16/2020] [Indexed: 11/29/2022] Open
Abstract
Background The inflammatory mediator calprotectin (CPT, myeloid-related protein 8/14) is known as an endogenous ligand contributing to pathophysiology in inflammatory diseases. Serum CPT reportedly became a potential biomarker in these conditions, though there is no report predicting the prognosis in hemodialysis patients. The aim of this study is to investigate the predictive role of serum CPT on mortality in hemodialysis patients. Methods We conducted a multicenter, observational cohort study of 388 Japanese subjects undergoing hemodialysis. Serum CPT were measured using an ELISA. The potential associations between serum CPT and clinical variables were cross-sectionally examined. Multivariate Cox regression was used to estimate the association between serum CPT, high-sensitivity C reactive protein (hs-CRP), white blood cell (WBC) count and mortality. Median follow-up was 6.6 years. Results The median CPT level was 6108 ng/ml (median in healthy subjects, 2800) at baseline. Serum CPT positively correlated with WBC count (ρ = 0.54, P < 0.001) and hs-CRP values (ρ = 0.35, P < 0.001). In multivariate analysis, hs-CRP was an independent predictor of all-cause mortality after adjusting confounding factors (middle vs. low: hazard ratio [HR] 2.09, 95% confidence interval [CI] 1.23–3.66; high vs. low: 2.47, 1.40–4.47). In the analysis by stratum of phosphate levels, elevated CPT levels were significantly associated with all-cause mortality in the highest tertile (18.1; 3.15–345.9) among the high-phosphate group, but not among the low-phosphate group. Conclusions Serum CPT would become a potential predictive marker on mortality in hemodialysis patients with high-phosphate levels.
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12
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Russo G, Piscitelli P, Giandalia A, Viazzi F, Pontremoli R, Fioretto P, De Cosmo S. Atherogenic dyslipidemia and diabetic nephropathy. J Nephrol 2020; 33:1001-1008. [PMID: 32328901 DOI: 10.1007/s40620-020-00739-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 04/11/2020] [Indexed: 12/25/2022]
Abstract
Chronic kidney disease is associated with altered lipid metabolism and lipid accumulation. Although it is though that hyperlipemia is a consequence of kidney dysfunction, several lines of evidence support that hyperlipidemia may contribute to the onset and progression of kidney disease, also in diabetes. This review describes the results of recent observational studies supporting the concept that glucose is only partly responsible for kidney damage onset, while a cluster of factors, including hypertriglyceridemia and low HDL-cholesterol, could play a relevant role in inducing onset and progression of DKD. We also report the results of randomized clinical trials investigating in type 2 diabetic patients the role of drug improvement of hypertriglyceridemia on renal outcomes. Finally, we discuss putative mechanisms linking hyperlipidemia (i.e. hypertriglyceridemia or low HDL cholesterol) with kidney disease.
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Affiliation(s)
- Giuseppina Russo
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Pamela Piscitelli
- Unit of Internal Medicine, Department of Medical Sciences, IRCCS Casa Sollievo Della Sofferenza, Viale Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy
| | - Annalisa Giandalia
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Francesca Viazzi
- University of Genova and Ospedale Policlinico San Martino-IST, Genoa, Italy
| | - Roberto Pontremoli
- University of Genova and Ospedale Policlinico San Martino-IST, Genoa, Italy
| | - Paola Fioretto
- Department of Medicine, University of Padova, Padova, Italy
| | - Salvatore De Cosmo
- Unit of Internal Medicine, Department of Medical Sciences, IRCCS Casa Sollievo Della Sofferenza, Viale Cappuccini 1, 71013, San Giovanni Rotondo, FG, Italy.
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13
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Hata Y, Kuwabara T, Mori K, Kan Y, Sato Y, Umemoto S, Fujimoto D, Kanki T, Nishiguchi Y, Yokoi H, Kakizoe Y, Izumi Y, Yanagita M, Mukoyama M. Ablation of Myeloid Cell MRP8 Ameliorates Nephrotoxic Serum-induced Glomerulonephritis by Affecting Macrophage Characterization through Intraglomerular Crosstalk. Sci Rep 2020; 10:3056. [PMID: 32080297 PMCID: PMC7033179 DOI: 10.1038/s41598-020-59970-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 02/03/2020] [Indexed: 12/13/2022] Open
Abstract
Toll-like receptor 4 (TLR4) and one of its endogenous ligands myeloid-related protein 8 (MRP8 or S100A8), especially expressed in macrophages, play an important role in diabetic nephropathy and autoimmune disorders. However, detailed mechanisms and consequence of MRP8 expression remain unknown, partly due to embryonic lethality of MRP8 knockout mice. In this study, Myeloid lineage cell-specific MRP8 knockout mice were generated, and nephrotoxic serum-induced glomerulonephritis was developed. Mice with conditional ablation of MRP8 gene in myeloid cells exhibited less severe histological damage, proteinuria and inflammatory changes compared to control mice. Mechanism of MRP8 upregulation was investigated using cultured cells. Co-culture of macrophages with mesangial cells or mesangial cell-conditioned media, but not with proximal tubules, markedly upregulated MRP8 gene expression and inflammatory M1 phenotype in macrophages, which was attenuated in MRP8-deleted bone marrow-derived macrophages. Effects of MRP8 deletion was further studied in the context of macrophage-inducible C-type lectin (Mincle), which is critically involved in maintenance of M1 phenotype of macrophages. MRP8 ablation in myeloid cells suppressed the induction of Mincle expression on macrophages in glomerulonephritis. Thus, we propose that intraglomerular crosstalk between mesangial cells and macrophages plays a role in inflammatory changes in glomerulonephritis, and MRP8-dependent Mincle expression in macrophage may be involved in the process.
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Affiliation(s)
- Yusuke Hata
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Takashige Kuwabara
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan. .,Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan.
| | - Kiyoshi Mori
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Nephrology and Kidney Research, Shizuoka General Hospital, Shizuoka, Japan.,School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Youngna Kan
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yuki Sato
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shuro Umemoto
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Daisuke Fujimoto
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Tomoko Kanki
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yoshihiko Nishiguchi
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Hideki Yokoi
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yutaka Kakizoe
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Yuichiro Izumi
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Motoko Yanagita
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
| | - Masashi Mukoyama
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan.,Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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14
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Heilmann RM, Xenoulis PG, Müller K, Stavroulaki EM, Suchodolski JS, Steiner JM. Association of serum calprotectin (S100A8/A9) concentrations and idiopathic hyperlipidemia in Miniature Schnauzers. J Vet Intern Med 2019; 33:578-587. [PMID: 30788872 PMCID: PMC6430953 DOI: 10.1111/jvim.15460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 02/04/2019] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Idiopathic hyperlipidemia (IH) is a common condition in Miniature Schnauzers (MS). Studies in people have linked IH to low-grade inflammation, which plays an important role in the pathogenesis of IH complications. The role of inflammation in MS with IH is unknown. OBJECTIVE Evaluation of the inflammatory markers serum calprotectin and S100A12 in MS with IH and in response to dietary intervention for IH management. ANIMALS One-hundred fifty clinically healthy MS. METHODS Serum triglyceride, cholesterol, calprotectin, and S100A12 concentrations were measured before and after placing the dogs on an ultra-low fat diet. RESULTS Hypertriglyceridemia (HTGL, P < .001) and hypercholesterolemia (HCHOL, P = .01) were independently associated with increased serum calprotectin but not S100A12 concentrations. Compared to normolipidemic MS, serum calprotectin concentrations were significantly higher in MS with HTGL (P < .001) or combined hyperlipidemia (P = .02), but not those with isolated HCHOL (P = 1.0000). Presence (P = .005) and severity (P = .003) of HTGL and serum cholesterol concentrations (P = .04) decreased in MS with IH within 14-26 weeks after being placed on the ultra-low fat diet, but neither serum calprotectin nor S100A12 concentrations changed significantly with this dietary intervention. CONCLUSIONS AND CLINICAL IMPORTANCE Subclinical (low-grade) inflammation appears to be present in some MS with IH, and an ultra-low fat diet does not decrease serum concentrations of inflammatory proteins in those dogs. Whether this presumed inflammatory phenotype in MS with IH is associated with the development of IH complications (eg, insulin resistance) requires further research.
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Affiliation(s)
- Romy M Heilmann
- Small Animal Clinic, College of Veterinary Medicine, University of Leipzig, Leipzig, Saxony, Germany.,Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Panagiotis G Xenoulis
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas.,Small Animal Clinic, University of Thessaly, Karditsa, Greece
| | - Katrin Müller
- Small Animal Clinic, College of Veterinary Medicine, University of Leipzig, Leipzig, Saxony, Germany
| | | | - Jan S Suchodolski
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Jörg M Steiner
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
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15
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The Role of TLR4 on PGC-1 α-Mediated Oxidative Stress in Tubular Cell in Diabetic Kidney Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:6296802. [PMID: 29861832 PMCID: PMC5976914 DOI: 10.1155/2018/6296802] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/24/2018] [Accepted: 04/04/2018] [Indexed: 01/02/2023]
Abstract
The role and precise mechanism of TLR4 in mitochondria-related oxidative damage and apoptosis of renal tubules in diabetic kidney disease (DKD) remain unclear. We examined the expression of TLR4 in renal biopsy tissues. Db/db diabetic mice and HK-2 cells cultured under high glucose (HG) were used as in vivo and vitro models. Real-time RT-PCR, Western blot, and immunohistochemistry were performed to examine the mRNA and protein levels of TLR4, NF-κΒ, PGC-1α, cytochrome C, and cleaved caspase-3. ATP level, activity of electron transport chain complex III, and antioxidant enzymes were investigated for mitochondrial function. Electron microscopy (EM) and MitoTracker Red CMXRos were used for mitochondrial morphology alteration. DHE staining and TUNEL assay were detected for ROS accumulation and apoptosis. PGC-1α plasmids were used for the overexpression of PGC-1α in HK-2. TAK242 and parthenolide were used as TLR4 and NF-κB blockers, respectively. Results showed that TLR4 was extensively expressed in the renal tubules of DKD patients and db/db diabetic mice, which was positively related to the tubular interstitial damage score and urinary β-NAG levels. In diabetic mice, inhibition of TLR4 could reverse the decreased expression of PGC-1α, increased expression of cytochrome C and cleaved caspase-3, mitochondrial dysfunction and deformation, increased accumulation of ROS, and activation of tubular cell apoptosis. In vitro, inhibition of TLR4 or NF-κB showed consistent results. PGC-1α overexpression could reverse the mitochondrial dysfunction, increased cleaved caspase-3, and apoptosis in HK-2 cells treated with HG. Data indicated that the TLR4/NF-κB signaling pathway might be the upstream pathway of PGC-1α and promote the tubular damage of DKD by modulating the mitochondria-related oxidative damage and apoptosis.
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16
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He W, Yuan T, Choezom D, Hunkler H, Annamalai K, Lupse B, Maedler K. Ageing potentiates diet-induced glucose intolerance, β-cell failure and tissue inflammation through TLR4. Sci Rep 2018; 8:2767. [PMID: 29426925 PMCID: PMC5807311 DOI: 10.1038/s41598-018-20909-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/25/2018] [Indexed: 12/25/2022] Open
Abstract
Ageing and obesity are two major risk factors for the development of type 2 diabetes (T2D). A chronic, low-grade, sterile inflammation contributes to insulin resistance and β-cell failure. Toll-like receptor-4 (TLR4) is a major pro-inflammatory pathway; its ligands as well as downstream signals are increased systemically in patients with T2D and at-risk individuals. In the present study we investigated the combined effects of high fat/high sucrose diet (HFD) feeding, ageing and TLR4-deficiency on tissue inflammation, insulin resistance and β-cell failure. In young mice, a short-term HFD resulted in a mildly impaired glucose tolerance and reduced insulin secretion, together with a β-cell mass compensation. In older mice, HFD further deteriorated insulin secretion and induced a significantly impaired glucose tolerance and augmented tissue inflammation in adipose, liver and pancreatic islets, all of which was attenuated by TLR4 deficiency. Our results show that ageing exacerbates HFD-induced impairment of glucose homeostasis and pancreatic β-cell function and survival, and deteriorates HFD-induced induction of mRNA expression of inflammatory cytokines and pro-inflammatory macrophage markers. TLR4-deficiency protects against these combined deleterious effects of a high fat diet and ageing through a reduced expression of inflammatory products in both insulin sensitive tissues and pancreatic islets.
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Affiliation(s)
- Wei He
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany.
| | - Ting Yuan
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany
| | - Dolma Choezom
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany
| | - Hannah Hunkler
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany
| | - Karthika Annamalai
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany
| | - Blaz Lupse
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany
| | - Kathrin Maedler
- Centre for Biomolecular Interactions, University of Bremen, Bremen, Germany.
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17
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Hamers AAJ, Argmann C, Moerland PD, Koenis DS, Marinković G, Sokolović M, de Vos AF, de Vries CJM, van Tiel CM. Nur77-deficiency in bone marrow-derived macrophages modulates inflammatory responses, extracellular matrix homeostasis, phagocytosis and tolerance. BMC Genomics 2016; 17:162. [PMID: 26932821 PMCID: PMC4774191 DOI: 10.1186/s12864-016-2469-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 02/12/2016] [Indexed: 02/08/2023] Open
Abstract
Background The nuclear orphan receptor Nur77 (NR4A1, TR3, or NGFI-B) has been shown to modulate the inflammatory response of macrophages. To further elucidate the role of Nur77 in macrophage physiology, we compared the transcriptome of bone marrow-derived macrophages (BMM) from wild-type (WT) and Nur77-knockout (KO) mice. Results In line with previous observations, SDF-1α (CXCL12) was among the most upregulated genes in Nur77-deficient BMM and we demonstrated that Nur77 binds directly to the SDF-1α promoter, resulting in inhibition of SDF-1α expression. The cytokine receptor CX3CR1 was strongly downregulated in Nur77-KO BMM, implying involvement of Nur77 in macrophage tolerance. Ingenuity pathway analyses (IPA) to identify canonical pathways regulation and gene set enrichment analyses (GSEA) revealed a potential role for Nur77 in extracellular matrix homeostasis. Nur77-deficiency increased the collagen content of macrophage extracellular matrix through enhanced expression of several collagen subtypes and diminished matrix metalloproteinase (MMP)-9 activity. IPA upstream regulator analyses discerned the small GTPase Rac1 as a novel regulator of Nur77-mediated gene expression. We identified an inhibitory feedback loop with increased Rac1 activity in Nur77-KO BMM, which may explain the augmented phagocytic activity of these cells. Finally, we predict multiple chronic inflammatory diseases to be influenced by macrophage Nur77 expression. GSEA and IPA associated Nur77 to osteoarthritis, chronic obstructive pulmonary disease, rheumatoid arthritis, psoriasis, and allergic airway inflammatory diseases. Conclusions Altogether these data identify Nur77 as a modulator of macrophage function and an interesting target to treat chronic inflammatory disease. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2469-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Anouk A J Hamers
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. .,Present address: Department of Inflammation Biology, La Jolla Institute for Allergy and Immunology, San Diego, USA.
| | - Carmen Argmann
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. .,Present address: Institute for Genomics and Multiscale Biology Mount Sinai Hospital, New York, USA.
| | - Perry D Moerland
- Bioinformatics Laboratory, Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Duco S Koenis
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Goran Marinković
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Milka Sokolović
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. .,Present address: European Food Information Council, Brussels, Belgium.
| | - Alex F de Vos
- Center for Experimental and Molecular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Carlie J M de Vries
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Claudia M van Tiel
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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18
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Nozako M, Koyama T, Nagano C, Sato M, Matsumoto S, Mitani K, Yasufuku R, Kohashi M, Yoshikawa T. An Atherogenic Paigen-Diet Aggravates Nephropathy in Type 2 Diabetic OLETF Rats. PLoS One 2015; 10:e0143979. [PMID: 26606054 PMCID: PMC4659596 DOI: 10.1371/journal.pone.0143979] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 11/11/2015] [Indexed: 11/18/2022] Open
Abstract
Diabetic nephropathy develops in association with hyperglycemia, is aggravated by atherogenic factors such as dyslipidemia, and is sometimes initiated before obvious hyperglycemia is seen. However, the precise mechanisms of progression are still unclear. In this study, we investigated the influence of an atherogenic Paigen diet (PD) on the progression of nephropathy in spontaneous type 2 diabetic OLETF rats. Feeding PD to male OLETF rats for 12 weeks caused an extensive increase in excretion of urinary albumin and markers of tubular injury such as KIM-1 and L-FABP, accompanied by mesangial expansion and tubular atrophy. PD significantly increased plasma total cholesterol concentration, which correlates well with increases in urine albumin excretion and mesangial expansion. Conversely, PD did not change plasma glucose and free fatty acid concentrations. PD enhanced renal levels of mRNA for inflammatory molecules such as KIM-1, MCP-1, TLR4 and TNF-α and promoted macrophage infiltration and lipid accumulation in the tubulointerstitium and glomeruli in OLETF rats. Intriguingly, PD had little effect on urine albumin excretion and renal morphology in normal control LETO rats. This model may be useful in studying the complex mechanisms that aggravate diabetic nephropathy in an atherogenic environment.
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Affiliation(s)
- Masanori Nozako
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
- Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Takashi Koyama
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
- Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Chifumi Nagano
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
- Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Makoto Sato
- Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Satoshi Matsumoto
- Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Kiminobu Mitani
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Reiko Yasufuku
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Masayuki Kohashi
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
| | - Tomohiro Yoshikawa
- Free Radical Research Project, Otsuka Pharmaceutical Co., Ltd., Tokushima, Tokushima, Japan
- * E-mail:
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19
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Zhang Y, Ma KL, Liu J, Wu Y, Hu ZB, Liu L, Liu BC. Dysregulation of low-density lipoprotein receptor contributes to podocyte injuries in diabetic nephropathy. Am J Physiol Endocrinol Metab 2015; 308:E1140-8. [PMID: 25921580 DOI: 10.1152/ajpendo.00591.2014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 04/25/2015] [Indexed: 01/10/2023]
Abstract
Dyslipidemia plays crucial roles in the progression of diabetic nephropathy (DN). This study investigated the effects of high glucose on lipid accumulation in podocytes and explored its underlying mechanisms. Male db/m and db/db mice were fed a normal chow diet for 8 wk. Immortalised mouse podocytes were treated with or without high glucose for 24 h. The changes to the morphology and ultramicrostructures of the kidneys in mice were examined using pathological staining and electron microscopy. Intracellular lipid accumulation was evaluated by Oil Red O staining and a free cholesterol quantitative assay. The expressions of the molecules involved in low-density lipoprotein receptor (LDLr) pathway and podocyte injury were examined using immunofluorescent staining, real-time PCR, and Western blot. There were increased levels of plasma lipid, serum creatinine, and proteinuria in db/db mice compared with db/m mice. Moreover, there was significant mesangial matrix expansion, basement membrane thickening, podocyte foot process effacement, and phenotypic alteration in the db/db group. Additionally, lipid accumulation in the kidneys of db/db mice was increased due to increased protein expressions of LDLr, sterol regulatory element-binding protein (SREBP) cleavage-activating protein, and SREBP-2. These effects were further confirmed by in vitro studies. Interestingly, the treatment with LDLr siRNA inhibited lipid accumulation in podocytes and decreased the protein expression of molecules associated with phenotypic alteration in podocytes. High glucose disrupted LDLr feedback regulation in podocytes, which may cause intracellular lipid accumulation and alteration of podocyte phenotype, thereby accelerating DN progression.
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Affiliation(s)
- Yang Zhang
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Kun Ling Ma
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Jing Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Yu Wu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Ze Bo Hu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Liang Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
| | - Bi Cheng Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing City, Jiangsu Province, China
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