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Li T, Sun W, Zhu S, He C, Chang T, Zhang J, Chen Y. T-2 Toxin-Mediated β-Arrestin-1 O-GlcNAcylation Exacerbates Glomerular Podocyte Injury via Regulating Histone Acetylation. Adv Sci (Weinh) 2024; 11:e2307648. [PMID: 38083975 PMCID: PMC10870076 DOI: 10.1002/advs.202307648] [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] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/22/2023] [Indexed: 02/17/2024]
Abstract
T-2 toxin causes renal dysfunction with proteinuria and glomerular podocyte damage. This work explores the role of metabolic disorder/reprogramming-mediated epigenetic modification in the progression of T-2 toxin-stimulated podocyte injury. A metabolomics experiment is performed to assess metabolic responses to T-2 toxin infection in human podocytes. Roles of protein O-linked-N-acetylglucosaminylation (O-GlcNAcylation) in regulating T-2 toxin-stimulated podocyte injury in mouse and podocyte models are assessed. O-GlcNAc target proteins are recognized by mass spectrometry and co-immunoprecipitation experiments. Moreover, histone acetylation and autophagy levels are measured. T-2 toxin infection upregulates glucose transporter type 1 (GLUT1) expression and enhances hexosamine biosynthetic pathway in glomerular podocytes, resulting in a significant increase in β-arrestin-1 O-GlcNAcylation. Decreasing β-arrestin-1 or O-GlcNAc transferase (OGT) effectively prevents T-2 toxin-induced renal dysfunction and podocyte injury. Mechanistically, O-GlcNAcylation of β-arrestin-1 stabilizes β-arrestin-1 to activate the mammalian target of rapamycin (mTOR) pathway as well as to inhibit autophagy during podocyte injury by promoting H4K16 acetylation. To sum up, OGT-mediated β-arrestin-1 O-GlcNAcylation is a vital regulator in the development of T-2 toxin-stimulated podocyte injury via activating the mTOR pathway to suppress autophagy. Targeting β-arrestin-1 or OGT can be a potential therapy for T-2 toxin infection-associated glomerular injury, especially podocyte injury.
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Affiliation(s)
- Tushuai Li
- School of Biology and Food EngineeringChangshu Institute of TechnologySuzhou215500P.R. China
- Wuxi School of MedicineJiangnan UniversityWuxi214013P.R. China
- Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi BranchWuxi214013P.R. China
| | - Wenxue Sun
- Translational Pharmaceutical LaboratoryJining First People's HospitalShandong First Medical UniversityJining272000P.R. China
- Postdoctoral of Shandong University of Traditional Chinese MedicineJi'nan250355P.R. China
- Institute of Translational PharmacyJining Medical Research AcademyJining272000P.R. China
| | - Shenglong Zhu
- Wuxi School of MedicineJiangnan UniversityWuxi214013P.R. China
- Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi BranchWuxi214013P.R. China
| | - Chengsheng He
- School of Biology and Food EngineeringChangshu Institute of TechnologySuzhou215500P.R. China
| | - Tong Chang
- School of Biology and Food EngineeringChangshu Institute of TechnologySuzhou215500P.R. China
| | - Jie Zhang
- School of Biology and Food EngineeringChangshu Institute of TechnologySuzhou215500P.R. China
| | - Yongquan Chen
- Wuxi School of MedicineJiangnan UniversityWuxi214013P.R. China
- Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi BranchWuxi214013P.R. China
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Tanaka S, Wakui H, Azushima K, Tsukamoto S, Yamaji T, Urate S, Suzuki T, Abe E, Taguchi S, Yamada T, Kobayashi R, Kanaoka T, Kamimura D, Kinguchi S, Takiguchi M, Funakoshi K, Yamashita A, Ishigami T, Tamura K. Effects of a High-Protein Diet on Kidney Injury under Conditions of Non-CKD or CKD in Mice. Int J Mol Sci 2023; 24:ijms24097778. [PMID: 37175483 PMCID: PMC10177820 DOI: 10.3390/ijms24097778] [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: 03/02/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 05/15/2023] Open
Abstract
Considering the prevalence of obesity and global aging, the consumption of a high-protein diet (HPD) may be advantageous. However, an HPD aggravates kidney dysfunction in patients with chronic kidney disease (CKD). Moreover, the effects of an HPD on kidney function in healthy individuals are controversial. In this study, we employed a remnant kidney mouse model as a CKD model and aimed to evaluate the effects of an HPD on kidney injury under conditions of non-CKD and CKD. Mice were divided into four groups: a sham surgery (sham) + normal diet (ND) group, a sham + HPD group, a 5/6 nephrectomy (Nx) + ND group and a 5/6 Nx + HPD group. Blood pressure, kidney function and kidney tissue injury were compared after 12 weeks of diet loading among the four groups. The 5/6 Nx groups displayed blood pressure elevation, kidney function decline, glomerular injury and tubular injury compared with the sham groups. Furthermore, an HPD exacerbated glomerular injury only in the 5/6 Nx group; however, an HPD did not cause kidney injury in the sham group. Clinical application of these results suggests that patients with CKD should follow a protein-restricted diet to prevent the exacerbation of kidney injury, while healthy individuals can maintain an HPD without worrying about the adverse effects.
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Affiliation(s)
- Shohei Tanaka
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Hiromichi Wakui
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Kengo Azushima
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Shunichiro Tsukamoto
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Takahiro Yamaji
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
- Cardiovascular and Metabolic Disorders Program, Duke-NUS Medical School, 8 College Road, Singapore 169857, Singapore
| | - Shingo Urate
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Toru Suzuki
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Eriko Abe
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Shinya Taguchi
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Takayuki Yamada
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
- Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh, 3550 Terrace Street, Pittsburgh, PA 15261, USA
| | - Ryu Kobayashi
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Tomohiko Kanaoka
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Daisuke Kamimura
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Sho Kinguchi
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Masahito Takiguchi
- Department of Neuroanatomy, School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Kengo Funakoshi
- Department of Neuroanatomy, School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Akio Yamashita
- Department of Investigative Medicine, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishiharacho, Okinawa 903-0215, Japan
| | - Tomoaki Ishigami
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
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Madhavan SM, Konieczkowski M, Bruggeman LA, DeWalt M, Nguyen JK, O'Toole JF, Sedor JR. Essential role of Wtip in mouse development and maintenance of the glomerular filtration barrier. Am J Physiol Renal Physiol 2022; 323:F272-F287. [PMID: 35862649 PMCID: PMC9394782 DOI: 10.1152/ajprenal.00051.2022] [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: 03/02/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/22/2022] Open
Abstract
Wilms' tumor interacting protein (Wtip) has been implicated in cell junction assembly and cell differentiation and interacts with proteins in the podocyte slit diaphragm, where it regulates podocyte phenotype. To define Wtip expression and function in the kidney, we created a Wtip-deleted mouse model using β-galactosidase-neomycin (β-geo) gene trap technology. Wtip gene trap mice were embryonic lethal, suggesting additional developmental roles outside kidney function. Using β-geo heterozygous and normal mice, Wtip expression was identified in the developing kidneys, heart, and eyes. In the kidney, expression was restricted to podocytes, which appeared initially at the capillary loop stage coinciding with terminal podocyte differentiation. Heterozygous mice had an expected lifespan and showed no evidence of proteinuria or glomerular pathology. However, heterozygous mice were more susceptible to glomerular injury than wild-type littermates and developed more significant and prolonged proteinuria in response to lipopolysaccharide or adriamycin. In normal human kidneys, WTIP expression patterns were consistent with observations in mice and were lost in glomeruli concurrent with loss of synaptopodin expression in disease. Mechanistically, we identified the Rho guanine nucleotide exchange factor 12 (ARHGEF12) as a binding partner for WTIP. ARHGEF12 was expressed in human podocytes and formed high-affinity interactions through their LIM- and PDZ-binding domains. Our findings suggest that Wtip is essential for early murine embryonic development and maintaining normal glomerular filtration barrier function, potentially regulating slit diaphragm and foot process function through Rho effector proteins.NEW & NOTEWORTHY This study characterized dynamic expression patterns of Wilms' tumor interacting protein (Wtip) and demonstrates the novel role of Wtip in murine development and maintenance of the glomerular filtration barrier.
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Affiliation(s)
- Sethu M Madhavan
- Department of Medicine, The Ohio State University, Columbus, Ohio
| | | | - Leslie A Bruggeman
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio
- Department of Nephrology, Cleveland Clinic, Cleveland, Ohio
| | - Megan DeWalt
- Department of Medicine, The Ohio State University, Columbus, Ohio
| | - Jane K Nguyen
- Department of Pathology, Cleveland Clinic, Cleveland, Ohio
| | - John F O'Toole
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio
- Department of Nephrology, Cleveland Clinic, Cleveland, Ohio
| | - John R Sedor
- Department of Inflammation and Immunity, Cleveland Clinic, Cleveland, Ohio
- Department of Nephrology, Cleveland Clinic, Cleveland, Ohio
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
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Song W, Zhou X, Duan Q, Wang Q, Li Y, Li A, Zhou W, Sun L, Qiu L, Li R, Li Y. Using random forest algorithm for glomerular and tubular injury diagnosis. Front Med (Lausanne) 2022; 9:911737. [PMID: 35966858 PMCID: PMC9366016 DOI: 10.3389/fmed.2022.911737] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 04/03/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
Objectives Chronic kidney disease (CKD) is a common chronic condition with high incidence and insidious onset. Glomerular injury (GI) and tubular injury (TI) represent early manifestations of CKD and could indicate the risk of its development. In this study, we aimed to classify GI and TI using three machine learning algorithms to promote their early diagnosis and slow the progression of CKD. Methods Demographic information, physical examination, blood, and morning urine samples were first collected from 13,550 subjects in 10 counties in Shanxi province for classification of GI and TI. Besides, LASSO regression was employed for feature selection of explanatory variables, and the SMOTE (synthetic minority over-sampling technique) algorithm was used to balance target datasets, i.e., GI and TI. Afterward, Random Forest (RF), Naive Bayes (NB), and logistic regression (LR) were constructed to achieve classification of GI and TI, respectively. Results A total of 12,330 participants enrolled in this study, with 20 explanatory variables. The number of patients with GI, and TI were 1,587 (12.8%) and 1,456 (11.8%), respectively. After feature selection by LASSO, 14 and 15 explanatory variables remained in these two datasets. Besides, after SMOTE, the number of patients and normal ones were 6,165, 6,165 for GI, and 6,165, 6,164 for TI, respectively. RF outperformed NB and LR in terms of accuracy (78.14, 80.49%), sensitivity (82.00, 84.60%), specificity (74.29, 76.09%), and AUC (0.868, 0.885) for both GI and TI; the four variables contributing most to the classification of GI and TI represented SBP, DBP, sex, age and age, SBP, FPG, and GHb, respectively. Conclusion RF boasts good performance in classifying GI and TI, which allows for early auxiliary diagnosis of GI and TI, thus facilitating to help alleviate the progression of CKD, and enjoying great prospects in clinical practice.
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Affiliation(s)
- Wenzhu Song
- School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Xiaoshuang Zhou
- Department of Nephrology, Shanxi Provincial People's Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China
| | - Qi Duan
- Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China
| | - Qian Wang
- Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China
| | - Yaheng Li
- Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China
| | - Aizhong Li
- Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China
| | - Wenjing Zhou
- School of Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Lin Sun
- College of Traditional Chinese Medicine and Food Engineering, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Lixia Qiu
- School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Rongshan Li
- Department of Nephrology, Shanxi Provincial People's Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China.,Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China
| | - Yafeng Li
- Department of Nephrology, Shanxi Provincial People's Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China.,Shanxi Provincial Key Laboratory of Kidney Disease, Taiyuan, China.,Core Laboratory, Shanxi Provincial People's Hospital (Fifth Hospital) of Shanxi Medical University, Taiyuan, China.,Academy of Microbial Ecology, Shanxi Medical University, Taiyuan, China
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5
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Nakamura T, Bonnard B, Palacios-Ramirez R, Fernández-Celis A, Jaisser F, López-Andrés N. Biglycan Is a Novel Mineralocorticoid Receptor Target Involved in Aldosterone/Salt-Induced Glomerular Injury. Int J Mol Sci 2022; 23:ijms23126680. [PMID: 35743123 PMCID: PMC9224513 DOI: 10.3390/ijms23126680] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/09/2022] [Accepted: 06/12/2022] [Indexed: 11/16/2022] Open
Abstract
The beneficial effects of mineralocorticoid receptor (MR) antagonists (MRAs) for various kidney diseases are established. However, the underlying mechanisms of kidney injury induced by MR activation remain to be elucidated. We recently reported aldosterone-induced enhancement of proteoglycan expression in mitral valve interstitial cells and its association with fibromyxomatous valvular disorder. As the expression of certain proteoglycans is elevated in several kidney diseases, we hypothesized that proteoglycans mediate kidney injury in the context of aldosterone/MR pathway activation. We evaluated the proteoglycan expression and tissue injury in the kidney and isolated glomeruli of uninephrectomy/aldosterone/salt (NAS) mice. The MRA eplerenone was administered to assess the role of the MR pathway. We investigated the direct effects of biglycan, one of the proteoglycans, on macrophages using isolated macrophages. The kidney samples from NAS-treated mice showed enhanced fibrosis and increased expression of biglycan accompanying glomerular macrophage infiltration and enhanced expression of TNF-α, iNOS, Nox2, CCL3 (C-C motif chemokine ligand 3), and phosphorylated NF-κB. Eplerenone blunted these changes. Purified biglycan stimulated macrophages to express TNF-α, iNOS, Nox2, and CCL3. This was prevented by a toll-like receptor 4 (TLR4) or NF-κB inhibitor, indicating that biglycan stimulation is dependent on the TLR4/NF-κB pathway. We identified the proteoglycan biglycan as a novel target of MR involved in MR-induced glomerular injury and macrophage infiltration via a biglycan/TLR4/NF-κB/CCL3 cascade.
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Affiliation(s)
- Toshifumi Nakamura
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France; (T.N.); (B.B.); (R.P.-R.)
| | - Benjamin Bonnard
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France; (T.N.); (B.B.); (R.P.-R.)
| | - Roberto Palacios-Ramirez
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France; (T.N.); (B.B.); (R.P.-R.)
| | - Amaya Fernández-Celis
- Cardiovascular Translational Research, Navarrabiomed (Miguel Servet Foundation), Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain;
| | - Frédéric Jaisser
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, 75006 Paris, France; (T.N.); (B.B.); (R.P.-R.)
- INSERM, Clinical Investigation Centre 1433, French-Clinical Research Infrastructure Network (F-CRIN) INI-CRCT (Cardiovascular and Renal Clinical Trialists), 54500 Nancy, France
- Correspondence: (F.J.); (N.L.-A.); Tel.: +33-144276485 (F.J.); +34-848428539 (N.L.-A.)
| | - Natalia López-Andrés
- Cardiovascular Translational Research, Navarrabiomed (Miguel Servet Foundation), Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain;
- Correspondence: (F.J.); (N.L.-A.); Tel.: +33-144276485 (F.J.); +34-848428539 (N.L.-A.)
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Lu Y, Stec DE, Liu R, Ryan M, Drummond HA. βENaC and ASIC2 associate in VSMCs to mediate pressure-induced constriction in the renal afferent arteriole. Am J Physiol Renal Physiol 2022; 322:F498-F511. [PMID: 35285274 PMCID: PMC8977180 DOI: 10.1152/ajprenal.00003.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/04/2022] [Revised: 02/17/2022] [Accepted: 03/03/2022] [Indexed: 11/22/2022] Open
Abstract
In independent studies, our laboratory has shown the importance of the degenerin proteins β-epithelial Na+ channel (βENaC) and acid-sensing ion channel 2 (ASIC2) in pressure-induced constriction (PIC) in renal interlobar arteries. Most, but not all, of the PIC response is abolished in mice lacking normal levels of βENaC or in ASIC2-null mice, indicating that the functions of βENaC and ASIC2 cannot fully compensate for the loss of the other. Degenerin proteins are known to associate and form heteromeric channels in expression systems, but whether they interact biochemically and functionally in vascular smooth muscle cells is unknown. We hypothesized that βENaC and ASIC2 interact to mediate PIC responses in renal vessels. To address this possibility, we 1) used biochemical approaches to show that βENaC associates into high-molecular-weight complexes and immunoprecipitants with ASIC2 in vascular smooth muscle cells and then 2) examined PIC in renal afferent arterioles in mice lacking normal levels of βENaC (βENaCm/m) or/and ASIC2 (ASIC2-/-) using the isolated afferent arteriole-attached glomerulus preparation. We found that the sensitivity of the PIC response (slope of the relationship between intraluminal pressure and percent myogenic tone) decreased to 26%, 27%, and -8% of wild-type controls in ASIC2-/-, βENaCm/m, and ASIC2-/-/βENaCm/m groups, respectively, suggesting that the PIC response was totally abolished in mice deficient in both ASIC2 and βENaC. Surprisingly, we found that resting internal diameters were 20-30% lower (60 mmHg, Ca2+ free) in ASIC2-/-/βENaCm/m (11.3 ± 0.5 µm) mice compared with control (14.4 ± 0.6 µm, P = 0.0007, independent two-tailed t test) or singly modified (15.7 ± 1.0 to 16.3 ± 1.1 µm) mice, suggesting compensatory vasoconstriction or remodeling. We then examined mean arterial blood pressure (MAP) using radiotelemetry and glomerular injury using histological examination of renal sections. We found that 24-h MAP was mildly elevated (+8 mmHg) in ASIC2-/-/βENaCm/m mice versus wild-type controls and the glomerular injury score was modestly increased by 38%. These findings demonstrate that myogenic constriction in afferent arterioles is dependent on normal expression of βENaC and ASIC2 and that mice lacking normal levels of ASIC2 and βENaC have mild renal injury and increased MAP.NEW & NOTEWORTHY Transmission of systemic blood pressure to delicate renal microvessels is a primary determinant of vascular injury in chronic kidney disease progression to end-stage renal disease. Here, we identified two degenerin family members, with an evolutionary link to mechanosensing, that interact biochemically and functionally to regulate systemic blood pressure and renal injury. Thus, degenerin proteins may serve as a target for the development of therapies to prevent or delay renal disease progression.
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Affiliation(s)
- Yan Lu
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - David E Stec
- Department of Physiology and Biophysics and the Center for Excellence in Cardiovascular Renal Research, University of Mississippi Medical Center, Jackson, Mississippi
| | - Ruisheng Liu
- Department of Molecular Pharmacology and Physiology, University of South Florida, College of Medicine, Tampa, Florida
| | - Michael Ryan
- Department of Pharmacology, Physiology and Neuroscience, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Heather A Drummond
- Department of Physiology and Biophysics and the Center for Excellence in Cardiovascular Renal Research, University of Mississippi Medical Center, Jackson, Mississippi
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He X, Cantrell AC, Williams QA, Chen J, Zeng H. TIGAR deficiency sensitizes angiotensin-II-induced renal fibrosis and glomerular injury. Physiol Rep 2022; 10:e15234. [PMID: 35441828 PMCID: PMC9020173 DOI: 10.14814/phy2.15234] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 11/24/2022] Open
Abstract
Angiotensin II (Ang-II) is one of the major contributors to the progression of renal fibrosis, inflammation, glomerular injury, and chronic kidney disease. Emerging evidence suggests that renal glycolysis plays an important role in renal fibrosis and injury. TP53-induced glycolysis and apoptosis regulator (TIGAR) has been shown to regulate glycolysis. In the present study, we investigated the role of TIGAR in renal glycolysis, fibrosis, and glomerular injury during Ang-II-induced hypertension. Wild-type (WT) and TIGAR knockout (KO) mice were infused with Ang-II (1 µg/kg/min) via mini-pumps for 4 weeks. The mean arterial pressure was similar between the WT and TIGAR KO mice, associated with a comparable increase in plasma creatinine level. Ang-II infusion resulted in a significant increase in renal interstitial fibrosis and more mesangial expansion and collapsed glomerular structure in the TIGAR KO mice. These were associated with elevated expression of hypoxia-inducible factor-1 alpha, glycolytic enzymes, and transforming growth factor beta 1 in the TIGAR KO mice after Ang-II infusion when compared to that of the WT mice. The coupled-enzyme method revealed that PFK-1 activity was similarly increased in WT and TIGAR KO mice after Ang-II infusion. Our present study suggests that TIGAR is involved in Ang-II-induced renal fibrosis and glomerular injury, although it has little effect on blood pressure and renal function. Knockout of TIGAR sensitizes Ang-II-induced renal fibrosis and injury. This study provides new insights into the role of TIGAR in renal metabolism and pathological remodeling during Ang-II-induced hypertension.
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Affiliation(s)
- Xiaochen He
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterSchool of MedicineJacksonMississippiUSA
| | - Aubrey C. Cantrell
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterSchool of MedicineJacksonMississippiUSA
| | - Quinesha A. Williams
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterSchool of MedicineJacksonMississippiUSA
| | - Jian‐Xiong Chen
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterSchool of MedicineJacksonMississippiUSA
| | - Heng Zeng
- Department of Pharmacology and ToxicologyUniversity of Mississippi Medical CenterSchool of MedicineJacksonMississippiUSA
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8
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Han H, Chen Y, Yang H, Cheng W, Zhang S, Liu Y, Liu Q, Liu D, Yang G, Li K. Identification and Verification of Diagnostic Biomarkers for Glomerular Injury in Diabetic Nephropathy Based on Machine Learning Algorithms. Front Endocrinol (Lausanne) 2022; 13:876960. [PMID: 35663304 PMCID: PMC9162431 DOI: 10.3389/fendo.2022.876960] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/14/2022] [Indexed: 11/25/2022] Open
Abstract
Diabetic nephropathy (DN) is regarded as the leading cause of end-stage renal disease worldwide and lacks novel therapeutic targets. To screen and verify special biomarkers for glomerular injury in patients with DN, fifteen datasets were retrieved from the Gene Expression Omnibus (GEO) database, correspondingly divided into training and testing cohorts and then merged. Using the limma package, 140 differentially expressed genes (DEGs) were screened out between 81 glomerular DN samples and 41 normal ones from the training cohort. With the help of the ConsensusClusterPlus and WGCNA packages, the 81 glomerular DN samples were distinctly divided into two subclusters, and two highly associated modules were identified. By using machine learning algorithms (LASSO, RF, and SVM-RFE) and the Venn diagram, two overlapping genes (PRKAR2B and TGFBI) were finally determined as potential biomarkers, which were further validated in external testing datasets and the HFD/STZ-induced mouse models. Based on the biomarkers, the diagnostic model was developed with reliable predictive ability for diabetic glomerular injury. Enrichment analyses indicated the apparent abnormal immune status in patients with DN, and the two biomarkers played an important role in the immune microenvironment. The identified biomarkers demonstrated a meaningful correlation between the immune cells' infiltration and renal function. In conclusion, two robust genes were identified as diagnostic biomarkers and may serve as potential targets for therapeutics of DN, which were closely associated with multiple immune cells.
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Affiliation(s)
- Hongdong Han
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Yanrong Chen
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Hao Yang
- Department of Endocrinology and Neurology, Jiulongpo People’s Hospital, Chongqing, China
| | - Wei Cheng
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Sijing Zhang
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Yunting Liu
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Qiuhong Liu
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Dongfang Liu
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Gangyi Yang
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Ke Li
- Department of Endocrinology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
- *Correspondence: Ke Li,
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9
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Zedan MM, Mansour AK, Bakr AA, Sobh MA, Khodadadi H, Salles EL, Alhashim A, Baban B, Golubnitschaja O, Elmarakby AA. Effect of Everolimus versus Bone Marrow-Derived Stem Cells on Glomerular Injury in a Rat Model of Glomerulonephritis: A Preventive, Predictive and Personalized Implication. Int J Mol Sci 2021; 23:344. [PMID: 35008770 PMCID: PMC8745690 DOI: 10.3390/ijms23010344] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/14/2021] [Accepted: 12/24/2021] [Indexed: 11/16/2022] Open
Abstract
Glomerular endothelial injury and effectiveness of glomerular endothelial repair play a crucial role in the progression of glomerulonephritis. Although the potent immune suppressive everolimus is increasingly used in renal transplant patients, adverse effects of its chronic use have been reported clinically in human glomerulonephritis and experimental renal disease. Recent studies suggest that progenitor stem cells could enhance glomerular endothelial repair with minimal adverse effects. Increasing evidence supports the notion that stem cell therapy and regenerative medicine can be effectively used in pathological conditions within the predictive, preventive and personalized medicine (PPPM) paradigm. In this study, using an experimental model of glomerulonephritis, we tested whether bone marrow-derived stem cells (BMDSCs) could provide better effect over everolimus in attenuating glomerular injury and improving the repair process in a rat model of glomerulonephritis. Anti-Thy1 glomerulonephritis was induced in male Sprague Dawley rats by injection of an antibody against Thy1, which is mainly expressed on glomerular mesangial cells. Additional groups of rats were treated with the immunosuppressant everolimus daily after the injection of anti-Thy1 or injected with single bolus dose of BMDSCs after one week of injection of anti-Thy1 (n = 6-8). Nine days after injection of anti-Thy1, glomerular albumin permeability and albuminuria were significantly increased when compared to control group (p < 0.05). Compared to BMDSCs, everolimus was significantly effective in attenuating glomerular injury, nephrinuria and podocalyxin excretion levels as well as in reducing inflammatory responses and apoptosis. Our findings suggest that bolus injection of BMDSCs fails to improve glomerular injury whereas everolimus slows the progression of glomerular injury in Anti-Thy-1 induced glomerulonephritis. Thus, everolimus could be used at the early stage of glomerulonephritis, suggesting potential implications of PPPM in the treatment of progressive renal injury.
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Affiliation(s)
- Mohamed M. Zedan
- Department of Pediatric, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; (M.M.Z.); (A.K.M.); (A.A.B.)
| | - Ahmed K. Mansour
- Department of Pediatric, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; (M.M.Z.); (A.K.M.); (A.A.B.)
| | - Ashraf A. Bakr
- Department of Pediatric, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; (M.M.Z.); (A.K.M.); (A.A.B.)
| | - Mohamed A. Sobh
- Urology and Nephrology Center, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt;
| | - Hesam Khodadadi
- Department of Oral Biology & Diagnostic Sciences, Augusta University, Augusta, GA 30912, USA; (H.K.); (E.L.S.); (B.B.)
| | - Evila Lopes Salles
- Department of Oral Biology & Diagnostic Sciences, Augusta University, Augusta, GA 30912, USA; (H.K.); (E.L.S.); (B.B.)
| | | | - Babak Baban
- Department of Oral Biology & Diagnostic Sciences, Augusta University, Augusta, GA 30912, USA; (H.K.); (E.L.S.); (B.B.)
| | - Olga Golubnitschaja
- Predictive, Preventive and Personalised (3P) Medicine, Department of Radiation Oncology, University Hospital Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, 53127 Bonn, Germany
| | - Ahmed A. Elmarakby
- Department of Oral Biology & Diagnostic Sciences, Augusta University, Augusta, GA 30912, USA; (H.K.); (E.L.S.); (B.B.)
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
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10
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Jankiewicz WK, Barnett SD, Stavniichuk A, Hwang SH, Hammock BD, Belayet JB, Khan AH, Imig JD. Dual sEH/COX-2 Inhibition Using PTUPB-A Promising Approach to Antiangiogenesis-Induced Nephrotoxicity. Front Pharmacol 2021; 12:744776. [PMID: 34955823 PMCID: PMC8695932 DOI: 10.3389/fphar.2021.744776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/20/2021] [Accepted: 10/21/2021] [Indexed: 01/11/2023] Open
Abstract
Kidney injury from antiangiogenic chemotherapy is a significant clinical challenge, and we currently lack the ability to effectively treat it with pharmacological agents. Thus, we set out to investigate whether simultaneous soluble epoxide hydrolase (sEH) and cyclooxygenase-2 (COX-2) inhibition using a dual sEH/COX-2 inhibitor PTUPB could be an effective strategy for treating antiangiogenic therapy-induced kidney damage. We used a multikinase inhibitor, sorafenib, which is known to cause serious renal side effects. The drug was administered to male Sprague-Dawley rats that were on a high-salt diet. Sorafenib was administered over the course of 56 days. The study included three experimental groups; 1) control group (naïve rats), 2) sorafenib group [rats treated with sorafenib only (20 mg/kg/day p.o.)], and 3) sorafenib + PTUPB group (rats treated with sorafenib only for the initial 28 days and subsequently coadministered PTUPB (10 mg/kg/day i.p.) from days 28 through 56). Blood pressure was measured every 2 weeks. After 28 days, sorafenib-treated rats developed hypertension (161 ± 4 mmHg). Over the remainder of the study, sorafenib treatment resulted in a further elevation in blood pressure through day 56 (200 ± 7 mmHg). PTUPB treatment attenuated the sorafenib-induced blood pressure elevation and by day 56, blood pressure was 159 ± 4 mmHg. Urine was collected every 2 weeks for biochemical analysis. After 28 days, sorafenib rats developed pronounced proteinuria (9.7 ± 0.2 P/C), which intensified significantly (35.8 ± 3.5 P/C) by the end of day 56 compared with control (2.6 ± 0.4 P/C). PTUPB mitigated sorafenib-induced proteinuria, and by day 56, it reduced proteinuria by 73%. Plasma and kidney tissues were collected on day 56. Kidney histopathology revealed intratubular cast formation, interstitial fibrosis, glomerular injury, and glomerular nephrin loss at day 56 in sorafenib-treated rats. PTUPB treatment reduced histological features by 30%-70% compared with the sorafenib-treated group and restored glomerular nephrin levels. Furthermore, PTUPB also acted on the glomerular permeability barrier by decreasing angiotensin-II-induced glomerular permeability to albumin. Finally, PTUPB improved in vitro the viability of human mesangial cells. Collectively, our data demonstrate the potential of using PTUPB or dual sEH/COX-2 inhibition as a therapeutic strategy against sorafenib-induced glomerular nephrotoxicity.
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Affiliation(s)
- Wojciech K. Jankiewicz
- Drug Discovery Center and Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Scott D. Barnett
- Drug Discovery Center and Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Anna Stavniichuk
- Drug Discovery Center and Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Sung Hee Hwang
- Department of Entomology and Nematology and Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Bruce D. Hammock
- Department of Entomology and Nematology and Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Jawad B. Belayet
- Department of Chemistry and Biochemistry, University of Wisconsin Milwaukee, Milwaukee, WI, United States
| | - A. H. Khan
- Drug Discovery Center and Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - John D. Imig
- Drug Discovery Center and Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
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11
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Yang Y, Kowalkowski K, Ciurlionis R, Buck WR, Glaser KB, Albert DH, Blomme EAG. Identification of VEGF Signaling Inhibition-Induced Glomerular Injury in Rats through Site-Specific Urinary Biomarkers. Int J Mol Sci 2021; 22:ijms222312629. [PMID: 34884436 PMCID: PMC8657489 DOI: 10.3390/ijms222312629] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/15/2021] [Accepted: 11/17/2021] [Indexed: 12/05/2022] Open
Abstract
Cancer therapies targeting the vascular endothelial growth factor (VEGF) signaling pathway can lead to renal damage by disrupting the glomerular ultrafiltration apparatus. The objective of the current study was to identify sensitive biomarkers for VEGF inhibition-induced glomerular changes in rats. Male Sprague-Dawley rats were administered an experimental VEGF receptor (VEGFR) inhibitor, ABT-123, for seven days to investigate the correlation of several biomarkers with microscopic and ultrastructural changes. Glomeruli obtained by laser capture microdissection were also subjected to gene expression analysis to investigate the underlying molecular events of VEGFR inhibition in glomerulus. ABT-123 induced characteristic glomerular ultrastructural changes in rats, including fusion of podocyte foot processes, the presence of subendothelial electron-dense deposits, and swelling and loss of fenestrations in glomerular endothelium. The subtle morphological changes cannot be detected with light microscopy or by changes in standard clinical chemistry and urinalysis. However, urinary albumin increased 44-fold as early as Day three. Urinary β2-microglobulin levels were also increased. Other urinary biomarkers that are typically associated with tubular injury were not significantly impacted. Such patterns in urinary biomarkers can provide valuable diagnostic insight to VEGF inhibition therapy-induced glomeruli injuries.
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Affiliation(s)
- Yi Yang
- Correspondence: ; Tel.: +1-847-937-8893
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12
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Medyńska A, Chrzanowska J, Kościelska-Kasprzak K, Bartoszek D, Żabińska M, Zwolińska D. Alpha-1 Acid Glycoprotein and Podocin mRNA as Novel Biomarkers for Early Glomerular Injury in Obese Children. J Clin Med 2021; 10:jcm10184129. [PMID: 34575240 PMCID: PMC8472314 DOI: 10.3390/jcm10184129] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 01/03/2023] Open
Abstract
Introduction: Obesity, which is a serious problem in children, has a negative impact on many organs, including kidneys, and obesity-related glomerulopathy (ORG) is an increasingly common cause of ESKD (end-stage kidney disease) in adults. Early-detected and -treated glomerular lesions are reversible, so it is important to find a useful marker of early damage. The study aimed to evaluate the albumin-to-creatinine ratio (ACR), urinary alpha-1-acid glycoprotein (α1-AGP), and mRNA of podocyte-specific proteins as indicators of glomerular injury and their relationship with the degree of obesity and metabolic disorders. Materials and Methods: A total of 125 obese children and 33 healthy peers were enrolled. Patients were divided into two groups, depending on SDS BMI values. ACR, α1-AGP, mRNA expression of nephrin, synaptopodin, podocin, and C2AP protein in urine sediment were measured. Results: ACR values did not differ between groups and were within the normal range. α1-AGP and mRNA expression were significantly higher in obese children compared with controls. mRNA expression of the remaining podocyte proteins was similar in both groups. No significant differences concerning all examined parameters were found depending on the degree of obesity. There was a positive significant correlation between α1-AGP and ACR. Conclusions: Increased α1-AGP before the onset of albuminuria suggests its usefulness as a biomarker of early glomerular damage in obese children. An increased podocin mRNA expression also indicates podocyte damage and may be linked to ORG development. The lack of increase in expression of other podocyte proteins suggests that podocin mRNA may be a more specific and sensitive biomarker. The degree of obesity has no impact on the tested parameters, but further studies are needed to confirm it.
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Affiliation(s)
- Anna Medyńska
- Department of Pediatric Nephrology, Wroclaw Medical University, 50-367 Wrocław, Poland;
- Correspondence: ; Tel.: +48-71-736-4400; Fax: +48-71-736-4409
| | - Joanna Chrzanowska
- Department of Pediatric Endocrinology and Diabetology, Wroclaw Medical University, 50-367 Wrocław, Poland;
| | - Katarzyna Kościelska-Kasprzak
- Specialist Laboratory at the Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-367 Wrocław, Poland; (K.K.-K.); (D.B.); (M.Ż.)
| | - Dorota Bartoszek
- Specialist Laboratory at the Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-367 Wrocław, Poland; (K.K.-K.); (D.B.); (M.Ż.)
| | - Marcelina Żabińska
- Specialist Laboratory at the Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, 50-367 Wrocław, Poland; (K.K.-K.); (D.B.); (M.Ż.)
| | - Danuta Zwolińska
- Department of Pediatric Nephrology, Wroclaw Medical University, 50-367 Wrocław, Poland;
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13
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Musa N, Ramzy T, Hamdy A, Arafa N, Hassan M. Assessment of urinary podocalyxin as a marker of glomerular injury in obesity-related kidney disease in children and adolescents with obesity compared to urinary albumin creatinine ratio. Clin Obes 2021; 11:e12452. [PMID: 33797164 DOI: 10.1111/cob.12452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 02/28/2021] [Accepted: 03/18/2021] [Indexed: 11/29/2022]
Abstract
Obesity increases the risk of chronic kidney disease in children. Our aim was to assess urinary podocalyxin (PCX) in children and adolescents with obesity as a potential marker of obesity-related kidney disease (ORKD). The current case-control study included 128 children with obesity compared to 60 non-obese age and sex matched controls. Study population were subjected to full history taking as well as thorough physical examination. Urine samples for albumin creatinine ratio (uACR) and PCX were collected from the study population as well as blood samples for assessment of serum creatinine and fasting lipid profile. A statistically significant difference was found between cases and controls regarding urinary PCX (P < .001) and uACR (P = .021). A statistically significant positive correlation was found between uACR and weight SD score (SDS), body mass index SDS, waist circumference, estimated glomerular filtration rate, triglycerides (TG) as well as urinary PCX, whilst urinary PCX correlated significantly with obesity duration and uACR. Cases with microalbuminuria had a statistically significant higher waist circumference, waist-hip ratio, fat percentage, TG and urinary PCX compared to those with normal uACR (P = .042, .034, .05, .018 and .036 respectively). Urinary PCX showed 83.3% sensitivity and 74% specificity in detection of albuminuria. Urinary PCX was increased significantly in children with obesity making it a potential sensitive marker of ORKD in children.
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Affiliation(s)
- Noha Musa
- Diabetes, Endocrine and Metabolism Pediatric Unit (DEMPU), Cairo University, Cairo, Egypt
| | - Tarek Ramzy
- Lecturer of Chemical pathology, Cairo University, Cairo, Egypt
| | - Ahmed Hamdy
- Pediatric Resident, Cairo University, Cairo, Egypt
| | - Noha Arafa
- Diabetes, Endocrine and Metabolism Pediatric Unit (DEMPU), Cairo University, Cairo, Egypt
| | - Mona Hassan
- Diabetes, Endocrine and Metabolism Pediatric Unit (DEMPU), Cairo University, Cairo, Egypt
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14
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Zhang Z, Wang FZ, Li ZX, Song XR. Telmisartan Attenuates the Growth of Epithelium-like Cells and Glomerular Injury in Spontaneously Hypertensive Rats. Curr Med Sci 2021; 41:498-504. [PMID: 34129200 DOI: 10.1007/s11596-021-2368-4] [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: 03/02/2020] [Accepted: 03/26/2021] [Indexed: 10/21/2022]
Abstract
The abnormal growth of epithelium-like cells has been noticed in spontaneously hypertensive rats (SHRs) with hypertensive nephropathy. However, the characteristics of abnormal epithelium-like cells and their pathogenesis in hypertensive nephropathy are not fully understood. In the present study, we investigated the correlation of epithelium-like cells with glomerular injury, and the effects of early drug intervention with telmisartan, an anti-hypertensive drug, on the growth of epithelium-like cells. The results showed that the epithelium-like cells were obviously observed lining along the luminal surface of Bowman's capsule in glomeruli, significantly resulting in the atrophy of the glomerular tuft. Some of the epithelium-like cells strongly expressed proliferating cell nuclear antigen (PCNA) and vimentin, indicating active cellular proliferation. The incidence of epithelium-like cells varied from 13.6% to 54.4% of glomeruli in 48-week-old SHRs, and from 5.1% to 18.0% of glomeruli in age-matched Wistar-Kyoto (WKY) rats (P<0.01). The linear regression analysis further confirmed an obvious correlation between the incidence of epithelium-like cells and the glomerular injury. Moreover, early intervention with telmisartan could dramatically attenuate the progression of epithelium-like cells growth. However, no significant effect of telmisartan on the established epithelium-like cells was observed. Taken together, we demonstrated the involvement of abnormal epithelium-like cells growth in glomerular injury during hypertensive nephropathy in SHRs, and firstly showed the positive effects of the anti-hypertensive drug on the progression of epithelium-like cells growth.
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Affiliation(s)
- Zhi Zhang
- College of Biological Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China.
| | - Fa-Zhan Wang
- State Key Laboratory of Biotherapy and Cancer Center, Sichuan University, Chengdu, 610041, China
| | - Zai-Xin Li
- College of Biological Engineering, Sichuan University of Science & Engineering, Zigong, 643000, China
| | - Xiang-Rong Song
- State Key Laboratory of Biotherapy and Cancer Center, Sichuan University, Chengdu, 610041, China
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15
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Fellström B, Helmersson-Karlqvist J, Lind L, Soveri I, Thulin M, Ärnlöv J, Kultima K, Larsson A. Albumin Urinary Excretion Is Associated with Increased Levels of Urinary Chemokines, Cytokines, and Growth Factors Levels in Humans. Biomolecules 2021; 11:396. [PMID: 33800255 DOI: 10.3390/biom11030396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 11/17/2022] Open
Abstract
The aim of the present study was to study the associations between urine albumin excretion, and a large number of urinary chemokines, cytokines, and growth factors in a normal population. We selected 90 urine samples from individuals without CVD, diabetes, stroke or kidney disease belonging to the Prospective Investigation of the Vasculature in Uppsala Seniors Study (41 males and 49 females, all aged 75 years). Urinary cytokine levels were analyzed with two multiplex assays (proximity extension assays) and the cytokine levels were correlated with urine albumin. After adjustment for sex, body mass index (BMI), estimated glomerular filtration rate (eGFR), smoking and multiplicity testing, 11 biomarkers remained significantly associated with urine albumin: thrombospondin 2, interleukin 6, interleukin 8, hepatocyte growth factor, matrix metalloproteinase-12 (MMP-12), C-X-C motif chemokine 9, tumor necrosis factor receptor superfamily member 11B, osteoprotegerin, growth-regulated alpha protein, C-X-C motif chemokine 6, oncostatin-M (OSM) and fatty acid-binding protein, intestinal, despite large differences in molecular weights. In this study, we found associations between urinary albumin and both small and large urine proteins. Additional studies are warranted to identify cytokine patterns and potential progression markers in various renal diseases.
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Kondapi K, Kumar NL, Moorthy S, Silambanan S. A Study of Association of Urinary Nephrin with Albuminuria in Patients with Diabetic Nephropathy. Indian J Nephrol 2021; 31:142-148. [PMID: 34267436 PMCID: PMC8240926 DOI: 10.4103/ijn.ijn_305_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/13/2019] [Accepted: 12/23/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND AIMS Diabetes mellitus and its complications are associated with high mortality and morbidity. Early detection is mandatory to improve quality of life years in patients with diabetic nephropathy. Hyperglycaemia disrupts podocytes, both structurally and functionally, leading to excretion of nephrin which is present in the glomerular filtration barrier. This study was undertaken to find out whether urinary nephrin is a better indicator of podocyte injury than albuminuria in patients with diabetic nephropathy. METHODS The study included 125 type 2 diabetes mellitus patients as cases categorized into three groups, depending upon albumin excretion. Age and sex matched 45 individuals without diabetes mellitus were chosen as the control group. The study protocol was approved by Institutional Ethics committee. Microalbumin was estimated by immunoturbidometry and urinary nephrin by ELISA. ANOVA and Tukey post-hoc tests were done to compare the data between the groups. Correlation studies were done. Odds ratio for nephrin was calculated. P value less than 0.05 was considered statistically significant. The statistical analyses were performed with SPSS software version 13.0. RESULTS The urinary nephrin was found to be proportionately increased from normoalbuminuria to macroalbuminuria and it was statistically significant, with sensitivity of 92.5% and specificity of 76.7%, the cut-off value of urinary nephrin was 97.5ng/mL. CONCLUSION Albuminuria has been used as an independent predictor of diabetic nephropathy. The statistical significant difference between the groups inferred that urinary nephrin excretion increased even in the stage of normoalbuminuria. Nephrin expression and its phosphorylation get altered by hyperglycaemia, contributing to renal damage. Nephrin was found to be a sensitive marker of early kidney dysfunction in diabetic patients.
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Affiliation(s)
- Kishore Kondapi
- Department of Biochemistry, SRMC & RI, Sri Ramachandra Institute of Higher Education Research (Deemed to be University), Porur, Chennai 600116, Chennai, Tamil Nadu, India
| | - N. Lakshmana Kumar
- Department of Biochemistry, GSL Medical College, Rajahmundry, Andhra Pradesh, India
| | - Swathi Moorthy
- Department of General Medicine, SRMC & RI, Sri Ramachandra Institute of Higher Education Research (Deemed to be University), Porur, Chennai 600116, Chennai, Tamil Nadu, India
| | - Santhi Silambanan
- Department of Biochemistry, SRMC & RI, Sri Ramachandra Institute of Higher Education Research (Deemed to be University), Porur, Chennai 600116, Chennai, Tamil Nadu, India
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17
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Gao N, Zhang Y, Li L, Lei L, Cao P, Zhao X, Lin L, Xu R. Hyperhomocysteinemia-Induced Oxidative Stress Aggravates Renal Damage in Hypertensive Rats. Am J Hypertens 2020; 33:1127-1135. [PMID: 32484231 DOI: 10.1093/ajh/hpaa086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 11/11/2019] [Revised: 04/03/2020] [Accepted: 05/25/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Hyperhomocysteinemia (HHcy) plays a synergistic role with hypertension in vascular injury; however, the relationship between HHcy and hypertension in renal injury remains unclear. Here, we sought to evaluate the relationship between HHcy and hypertension in the context of renal injury and to elucidate the mechanism of action underlying this relationship. METHODS Wistar Kyoto (WKY) rats and spontaneously hypertensive rats (SHR) were randomized into WKY, WKY + HHcy, SHR, and SHR + HHcy groups. Blood pressure, plasma homocysteine, serum malondialdehyde (MDA), serum superoxide dismutase (SOD), urinary albumin creatinine ratio (UACR), and glomerular filtration rate (GFR) were measured. Renal histopathology and expression levels of NOX2, NOX4, and nephrin in the kidneys were examined. RESULTS The WKY + HHcy and SHR groups exhibited lower serum SOD and GFR levels, relative to the WKY group, along with higher levels of both serum MDA and UACR. Higher mRNA and protein expression levels of NOX2 and NOX4, along with lower expression levels of nephrin, were observed in the kidneys of WKY + HHcy and SHR rats, relative to WKY controls, respectively. Similar effects were observed in the SHR + HHcy group, relative to the SHR group and WKY + HHcy group, respectively. Periodic acid-Schiff staining showed an increase in the glomerular extracellular matrix in the WKY + HHcy and SHR + HHcy groups compared with their respective controls. CONCLUSIONS HHcy appears to synergistically increase hypertensive renal damage by enhancing oxidative stress.
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Affiliation(s)
- Ning Gao
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Yuzhen Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Li Li
- Department of Clinical Nutrition, the People’s Hospital of Zhangqiu, Jinan, Shandong, China
| | - Lei Lei
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Ping Cao
- Department of Geriatric Medicine, Tai’an City Central Hospital, Tai’an, Shandong, China
| | - Xuan Zhao
- Department of Cardiovascular Medicine, People’s Hospital of Dongying, Dongying, Shandong, China
| | - Lin Lin
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
| | - Rui Xu
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China
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18
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Abstract
Glomerular injury and proteinuria are important pathophysiological features of chronic kidney disease. In the present study, we provide data on a glomerular injury model that was developed using the cancer chemotherapy drug sorafenib. Sorafenib is a tyrosine kinase inhibitor that acts via the vascular endothelial growth factor (VEGF) signaling pathway and is widely used to treat a variety of cancers. On the other hand, sorafenib causes serious renal side effects in patients including the development of chronic kidney disease. The current study aimed to utilize the nephrotoxic property of sorafenib to develop a rat model for chronic kidney disease. We demonstrate that rats administered sorafenib for 8 weeks along with a high salt diet (8% NaCl enriched) develop hypertension (80mmHg higher systolic blood pressure), proteinuria (75% higher), and 4-fold higher glomerular injury compared to vehicle-treated normal control rat. Sorafenib induced glomerular injury was associated with decreased (20-80% lower) renal mRNA expression of key glomerular structural proteins such as nephrin, podocin, synaptopodin, and podoplanin compared to vehicle-treated normal control rat. Renal cortical endothelial-to-mesenchymal transition (EndoMT) was activated in the sorafenib induced glomerular injury model. In the sorafenib treated rats, the renal EndoMT was evident with 20% lower mRNA expression of an endothelial marker WT-1 and 2 to 3-fold higher expression of mesenchymal markers Col III, FSP-1, α-SMA, and vimentin. In conclusion, we developed a rat pre-clinical chronic kidney disease model that manifest glomerular injury. We further demonstrate that the glomerular injury in this model is associated with decreased renal mRNA expression of key glomerular structural proteins and an activated kidney EndoMT.
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Affiliation(s)
| | - O Savchuk
- Taras Shevchenko National University, Kyiv, Ukraine
| | | | | | - John D Imig
- The Medical College of Wisconsin, Milwaukee, WI, USA
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19
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Vicente-Vicente L, González-Calle D, Casanova AG, Hernández-Sánchez MT, Prieto M, Rama-Merchán JC, Martín-Moreiras J, Martín-Herrero F, Sánchez PL, López-Hernández FJ, Cruz-González I, Morales AI. Quercetin, a Promising Clinical Candidate for The Prevention of Contrast-Induced Nephropathy. Int J Mol Sci 2019; 20:E4961. [PMID: 31597315 DOI: 10.3390/ijms20194961] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/02/2019] [Accepted: 10/04/2019] [Indexed: 01/09/2023] Open
Abstract
Iodinated contrast media (CM) are the leading cause of acute renal failure of toxic origin. Between 21% and 50% of patients that receive them develop contrast-induced nephropathy (CIN). All prophylactic measures used so far have failed to provide effective prevention. Since oxidative stress is involved in the damage, a possible preventive strategy could be the administration of antioxidant substances, such as quercetin. This compound has shown renoprotective effects in experimental studies. The aim of this study was to evaluate whether quercetin may be helpful in preventing CIN in patients undergoing coronary catheterization. A clinical phase II study was conducted. Patients were distributed in two groups, namely, CM (patients who only received contrast media) and CM+Q (patients who were pretreated with quercetin orally for 3-5 days). Results showed less incidence of CIN in the CM+Q group, possibly due to glomerular protection, evidenced by a lower increase in serum creatinine and albuminuria; and a lower decrease in the glomerular filtration rate (GFR). Furthermore, in this group, the relative risk of developing CIN observed in patients that received a high dose of contrast media was inferior. In conclusion, this is the first study that demonstrates that quercetin is a promising safe candidate in preventing CIN.
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20
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Priante G, Gianesello L, Ceol M, Del Prete D, Anglani F. Cell Death in the Kidney. Int J Mol Sci 2019; 20:E3598. [PMID: 31340541 DOI: 10.3390/ijms20143598] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 12/14/2022] Open
Abstract
Apoptotic cell death is usually a response to the cell’s microenvironment. In the kidney, apoptosis contributes to parenchymal cell loss in the course of acute and chronic renal injury, but does not trigger an inflammatory response. What distinguishes necrosis from apoptosis is the rupture of the plasma membrane, so necrotic cell death is accompanied by the release of unprocessed intracellular content, including cellular organelles, which are highly immunogenic proteins. The relative contribution of apoptosis and necrosis to injury varies, depending on the severity of the insult. Regulated cell death may result from immunologically silent apoptosis or from immunogenic necrosis. Recent advances have enhanced the most revolutionary concept of regulated necrosis. Several modalities of regulated necrosis have been described, such as necroptosis, ferroptosis, pyroptosis, and mitochondrial permeability transition-dependent regulated necrosis. We review the different modalities of apoptosis, necrosis, and regulated necrosis in kidney injury, focusing particularly on evidence implicating cell death in ectopic renal calcification. We also review the evidence for the role of cell death in kidney injury, which may pave the way for new therapeutic opportunities.
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21
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Kishi S, Minato M, Saijo A, Murakami N, Tamaki M, Matsuura M, Murakami T, Nagai K, Abe H, Nishioka Y, Doi T. IgA Nephropathy after Nivolumab Therapy for Postoperative Recurrence of Lung Squamous Cell Carcinoma. Intern Med 2018; 57:1259-1263. [PMID: 29279511 PMCID: PMC5980806 DOI: 10.2169/internalmedicine.9814-17] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Immune checkpoint inhibitors (ICIs) are becoming a common and important cancer therapy. ICIs are associated with a unique category of side effects, termed immune-related adverse events (irAEs). We herein report the case of a 72-year-old man with postoperative recurrence of lung squamous cell carcinoma who was treated with nivolumab and who developed proteinuria and a worsening kidney function. A kidney biopsy revealed IgA nephropathy. After drug withdrawal, the proteinuria improved and the deterioration of the patient's renal function was halted. Although renal irAEs are considered to be rare and glomerulonephritis is not typical presentation, physicians need to pay more attention to renal irAEs and glomerular injury.
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Affiliation(s)
- Seiji Kishi
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Masanori Minato
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Atsuro Saijo
- Department of Respiratory Medicine and Rheumatology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Naoka Murakami
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, USA
| | - Masanori Tamaki
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Motokazu Matsuura
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Taichi Murakami
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Kojiro Nagai
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Hideharu Abe
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Yasuhiko Nishioka
- Department of Respiratory Medicine and Rheumatology, Graduate School of Biomedical Sciences, Tokushima University, Japan
| | - Toshio Doi
- Department of Nephrology, Graduate School of Biomedical Sciences, Tokushima University, Japan
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22
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Huang W, Liu H, Zhu S, Woodson M, Liu R, Tilton RG, Miller JD, Zhang W. Sirt6 deficiency results in progression of glomerular injury in the kidney. Aging (Albany NY) 2017; 9:1069-1083. [PMID: 28351995 PMCID: PMC5391219 DOI: 10.18632/aging.101214] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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: 02/27/2016] [Accepted: 03/18/2017] [Indexed: 02/06/2023]
Abstract
Aging is associated with an increased incidence and prevalence of renal glomerular diseases. Sirtuin (Sirt) 6, a nicotinamide adenine dinucleotide (NAD)-dependent histone deacetylase, has been shown to protect against multiple age-associated phenotypes; however it is unknown whether Sirt6 has a direct pathophysiologic role in the kidney. In the present study, we demonstrate that Sirt6 is expressed in the kidney and aging Sirt6-deficient mice exhibit renal hypertrophy with glomerular enlargement. Sirt6 deletion induces podocyte injury, including decreases in slit diaphragm proteins, foot process effacement, and cellular loss, resulting in proteinuria. Knockdown of Sirt6 in cultured primary murine podocytes induces shape changes with loss of process formation and cell apoptosis. Moreover, Sirt6 deficiency results in progressive renal inflammation and fibrosis. Collectively, these data provide compelling evidence that Sirt6 is important for podocyte homeostasis and maintenance of glomerular function, and warrant further investigation into the role of Sirt6 in age-associated kidney dysfunction.
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Affiliation(s)
- Wen Huang
- Department of Healthcare, Qianfoshan Hospital Affiliated to Shandong University, Jinan, China.,Department of Ophthalmology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Hua Liu
- Center for Biomedical Engineering, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Shuang Zhu
- Department of Ophthalmology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Michael Woodson
- Sealy Center for Structural Biology and Molecular Biophysics, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Rong Liu
- Department of Ophthalmology, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Ronald G Tilton
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX 77555, USA
| | - Jordan D Miller
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Wenbo Zhang
- Department of Ophthalmology, University of Texas Medical Branch, Galveston, TX 77555, USA.,Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX 77555, USA
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23
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Abstract
Sphingolipids (SLs) regulate apoptosis, proliferation, and stress response. SLs, including ceramide, glycosphingolipids (glucosylceramide, lactosylceramide, and gangliosides) and sphingosine-1-phosphate (S1P), play a role in the pathogenesis and progression of genetic (lysosomal storage disease, congenital nephrotic syndrome and polycystic kidney disease) and non-genetic forms of chronic kidney diseases (CKDs). SLs metabolism defects promote complications (cardiovascular events, etc.) via oxidant stress in CKDs. A balancing role of apoptotic SLs and anti-apoptotic S1P is crucial in the regulation of glomerular injury and complications associated with CKDs. Interaction between SLs, endothelial function and reninangiotensin- aldosterone system (RAAS) plays an important role in the regulation of glomerular injury. SLs affect mitochondrial function that regulate the opening of mitochondrial permeability transition (MPT) pore, mitochondrial outer membrane permeability (MOMP), generation of reactive oxygen species (ROS), and expression of BcL-2 family proteins, which result in cytochrome c release and caspase activation, leading to apoptosis, and regulate glomerular cell proliferation or renal fibrosis. This review article summarizes the current evidence supporting a role of SLs metabolism defects in the pathogenesis and progression of glomerular injury and discusses a role of mitochondria, including MPT pore, MOMP, ROS generation, BcL-2 family proteins, interaction between SLs, endothelial function and RAAS, and SLs-induced downstream signaling events in CKDs. Crosstalk between these factors plays a role in the pathogenesis and progression of CKDs. Therapeutic strategy of targeting SLs metabolism defects for CKDs through modulation of the enzymes responsible for SLs metabolism defects is also discussed.
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Affiliation(s)
- Norishi Ueda
- Department of Pediatrics, Public Central Hospital of Matto Ishikawa, 3-8 Kuramitsu, Hakusan, 924-8588 Ishikawa. Japan
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24
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Lim BJ, Yang JW, Zou J, Zhong J, Matsusaka T, Pastan I, Zhang MZ, Harris RC, Yang HC, Fogo AB. Tubulointerstitial fibrosis can sensitize the kidney to subsequent glomerular injury. Kidney Int 2017; 92:1395-403. [PMID: 28709637 DOI: 10.1016/j.kint.2017.04.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 03/21/2017] [Accepted: 04/06/2017] [Indexed: 01/24/2023]
Abstract
Chronic glomerular injury is associated with eventual development of tubulointerstitial fibrosis. Here we aimed to assess whether, and how, mild chronic tubulointerstitial injury affects glomeruli. For this, we generated mice expressing different toxin receptors, one on their proximal tubular epithelial cells (diphtheria toxin receptor [DTR]) and the other only on podocytes (human CD25 [IL-2R] driven by the nephrin promoter [Nep25]), allowing serial induction of tubule-specific and glomerular (podocyte)-specific injury, respectively. Six weeks after diphtheria toxin injection, mild interstitial fibrosis was found in Nep25+/DTR+, but not in Nep25+/DTR- mice. However, atubular glomeruli and neuronal nitric oxide synthase, a mediator of tubuloglomerular feedback, were higher in Nep25+/DTR+ than in DTR- mice and these atubular glomeruli had less podocyte density as assessed by WT-1 biomarker expression. Peritubular capillary density, hypoxia-inducible factor-1 and -2, and cyclooxygenase 2 expression were similar at week six in the two groups. At week seven, all mice were given the immunotoxin LMB-2, which binds to CD25 to induce podocyte injury. Ten days later, proteinuria, podocyte injury, and glomerulosclerosis were more severe in Nep25+/DTR+ than Nep25+/DTR- mice with more severe sclerosis in the tubule-connected glomeruli. This supports the concept that even mild preexisting tubulointerstitial injury sensitizes glomeruli to subsequent podocyte-specific injury. Thus, increased atubular glomeruli and abnormal tubuloglomerular feedback significantly contribute to the crosstalk between the tubulointerstitium and glomeruli.
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Nassirpour R, Homer BL, Mathur S, Li Y, Li Z, Brown T, Carraher D, Warneke J, Bailey S, Percival K, O'Neil SP, Whiteley LO. Identification of Promising Urinary MicroRNA Biomarkers in Two Rat Models of Glomerular Injury. Toxicol Sci 2015; 148:35-47. [PMID: 26253709 DOI: 10.1093/toxsci/kfv167] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
MicroRNAs (miRNAs) are small, noncoding RNAs that regulate protein levels posttranscriptionally. miRNAs play important regulatory roles in many cellular processes and have been implicated in several diseases. Recent studies have reported significant levels of miRNAs in a variety of body fluids, raising the possibility that miRNAs could serve as useful biomarkers. Here, changes in miRNA expression patterns are described in 2 different rodent models of glomerular injury (acute puromycin aminonucleoside nephropathy and passive Heymann nephritis). By employing 2 different modes of glomerular insult, oxidative stress and immune-mediated toxicity, miRNA changes in both isolated glomeruli as well as urine specimens allow for identification of urinary miRNA biomarkers that are suggestive of drug-induced injury specifically to the glomerulus. Subsets of glomerular urinary miRNAs associated with these different modes of glomerular toxicity seem to be dependent on the mechanism of the induced injury, while 9 miRNAs that changed early in both glomerular and urine specimens were common to both studies. We further show that the miRNAs identified as mechanism-specific early glomerular injury biomarkers target key pathways and transcripts relevant to the type of insult, while the insult-independent changes might serve as ideal glomerular injury biomarkers.
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Affiliation(s)
| | - Bruce L Homer
- *Drug Safety, Pfizer Worldwide Research and Development
| | - Sachin Mathur
- Business Technology, Pfizer Research and Development, Andover, Massachusetts 01810; and
| | - Yizheng Li
- Business Technology, Pfizer Research and Development, Andover, Massachusetts 01810; and
| | - Zhonghan Li
- *Drug Safety, Pfizer Worldwide Research and Development
| | - Tom Brown
- Drug Safety, Pfizer Research and Development, Groton, Connecticut 06340
| | | | - James Warneke
- *Drug Safety, Pfizer Worldwide Research and Development
| | - Steven Bailey
- *Drug Safety, Pfizer Worldwide Research and Development
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26
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Jotwani V, Shlipak MG, Scherzer R, Parekh RS, Kao WHL, Bennett M, Cohen MH, Nowicki M, Sharma A, Young M, Tien PC, Parikh CR, Estrella MM. APOL1 Genotype and Glomerular and Tubular Kidney Injury in Women With HIV. Am J Kidney Dis 2015; 65:889-98. [PMID: 25921719 PMCID: PMC4615696 DOI: 10.1053/j.ajkd.2015.02.329] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/06/2014] [Accepted: 02/15/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND APOL1 genotype is associated with advanced kidney disease in African Americans, but the pathogenic mechanisms are unclear. Here, associations of APOL1 genotype with urine biomarkers of glomerular and tubular injury and kidney function decline were evaluated. STUDY DESIGN Observational study. SETTING & PARTICIPANTS 431 human immunodeficiency virus (HIV)-infected African American women enrolled in Women's Interagency HIV Study (WIHS). PREDICTOR APOL1 genotype. OUTCOMES Albumin-creatinine ratio (ACR), 4 tubular injury biomarkers (interleukin 18 [IL-18], kidney injury molecule 1 [KIM-1], neutrophil gelatinase-associated lipocalin [NGAL], and α1-microglobulin [A1M]), and kidney function estimated using the CKD-EPI cystatin C equation. MEASUREMENTS Participants were genotyped for APOL1 single-nucleotide polymorphisms rs73885319 (G1 allele) and rs71785313 (G2 allele). Urine biomarkers were measured using stored samples from 1999-2000. Cystatin C was measured using serum collected at baseline and 4- and 8-year follow-ups. RESULTS At baseline, ACRs were higher among 47 women with 2 APOL1 risk alleles versus 384 women with 0/1 risk allele (median, 24 vs 11mg/g; P<0.001). Compared with women with 0/1 risk allele, women with 2 risk alleles had 104% higher ACRs (95% CI, 29-223mg/g) and 2-fold greater risk of ACR>30 (95% CI, 1.17-3.44) mg/g after multivariable adjustment. APOL1 genotype showed little association with urine IL-18:Cr ratio, KIM-1:Cr ratio, and NGAL:Cr ratio (estimates of -5% [95% CI, -24% to 18%], -20% [95% CI, -36% to -1%], and 10% [95% CI, -26% to 64%], respectively) or detectable urine A1M (prevalence ratio, 1.13; 95% CI, 0.65-1.97) in adjusted analyses. Compared with women with 0/1 allele, women with 2 risk alleles had faster eGFR decline, by 1.2 (95% CI, 0.2 to 2.2) mL/min/1.73m(2) per year, and 1.7- and 3.4-fold greater rates of incident chronic kidney disease (95% CI, 1.1 to 2.5) and 10% annual eGFR decline (95% CI, 1.7 to 6.7), respectively, with minimal attenuation after adjustment for glomerular and tubular injury biomarker levels. LIMITATIONS Results may not be generalizable to men. CONCLUSIONS Among HIV-infected African American women, APOL1-associated kidney injury appears to localize to the glomerulus, rather than the tubules.
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Affiliation(s)
- Vasantha Jotwani
- Department of Medicine, San Francisco VA Medical Center, San Francisco, CA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA.
| | - Michael G Shlipak
- Department of Medicine, San Francisco VA Medical Center, San Francisco, CA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA
| | - Rebecca Scherzer
- Department of Medicine, San Francisco VA Medical Center, San Francisco, CA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA
| | - Rulan S Parekh
- Hospital for Sick Children, University Healthy Network and University of Toronto, Toronto, Canada; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - W H Linda Kao
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Michael Bennett
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Mardge H Cohen
- Department of Medicine, Stroger Hospital, Rush University, Chicago, IL; Department of Medicine, Rush University, Chicago, IL
| | - Marek Nowicki
- Department of Medicine, University of Southern California, Los Angeles, CA
| | - Anjali Sharma
- Division of Infectious Diseases, Department of Medicine, SUNY Downstate Medical Center, Brooklyn, NY
| | - Mary Young
- Division of Infectious Diseases and Travel Medicine, Department of Medicine, Georgetown University Medical Center, Washington, DC
| | - Phyllis C Tien
- Department of Medicine, San Francisco VA Medical Center, San Francisco, CA
| | - Chirag R Parikh
- Section of Nephrology, Department of Medicine, Yale University, New Haven, CT; Program of Applied Translational Research, Yale University, New Haven, CT
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27
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Lakhe-Reddy S, Li V, Arnold TD, Khan S, Schelling JR. Mesangial cell αvβ8-integrin regulates glomerular capillary integrity and repair. Am J Physiol Renal Physiol 2014; 306:F1400-9. [PMID: 24740792 DOI: 10.1152/ajprenal.00624.2013] [Citation(s) in RCA: 12] [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: 12/25/2022] Open
Abstract
αvβ8-Integrin is most abundantly expressed in the kidney, brain, and female reproductive organs, and its cognate ligand is latent transforming growth factor (LTGF)-β. Kidney αvβ8-integrin localizes to mesangial cells, and global β8-integrin gene (Itgb8) deletion results in embryonic lethality due to impaired placentation and cerebral hemorrhage. To circumvent the lethality and better define kidney αvβ8-integrin function, Cre-lox technology was used to generate mesangial-specific Itgb8-null mice. Platelet-derived growth factor-β receptor (PDGFBR)-Cre mice crossed with a reporter strain revealed functional Cre recombinase activity in a predicted mesangial pattern. However, mating between two different PDGFBR-Cre or Ren1(d)-Cre strains with Itgb8 (flox/-) mice consistently resulted in incomplete recombination, with no renal phenotype in mosaic offspring. Induction of a renal phenotype with Habu snake venom, a reversible mesangiolytic agent, caused exaggerated glomerular capillary microaneurysms and delayed recovery in Cre(+/-) PDGFRB (flox/-) mice compared with Cre(+/-) PDGFRB (flox/+) control mice. To establish the mechanism, in vitro experiments were conducted in Itgb8-null versus Itgb8-expressing mesangial cells and fibroblasts, which revealed β8-integrin-regulated adhesion to Arg-Gly-Asp (RGD) peptides within a mesangial-conditioned matrix as well as β8-integrin-dependent migration on RGD-containing LTGF-β or vitronectin matrices. We speculate that kidney αvβ8-integrin indirectly controls glomerular capillary integrity through mechanical tension generated by binding RGD peptides in the mesangial matrix, and healing after glomerular injury may be facilitated by mesangial cell migration, which is guided by transient β8-integrin interactions with RGD ligands.
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Affiliation(s)
- Sujata Lakhe-Reddy
- Department of Medicine, Case Western Reserve University, Rammelkamp Center for Research, MetroHealth Medical Center, Cleveland, Ohio; and
| | - Vincent Li
- Department of Medicine, Case Western Reserve University, Rammelkamp Center for Research, MetroHealth Medical Center, Cleveland, Ohio; and
| | - Thomas D Arnold
- Department of Pediatrics, University of California, San Francisco, California
| | - Shenaz Khan
- Department of Medicine, Case Western Reserve University, Rammelkamp Center for Research, MetroHealth Medical Center, Cleveland, Ohio; and
| | - Jeffrey R Schelling
- Department of Medicine, Case Western Reserve University, Rammelkamp Center for Research, MetroHealth Medical Center, Cleveland, Ohio; and
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28
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Casalena G, Krick S, Daehn I, Yu L, Ju W, Shi S, Tsai SY, D'Agati V, Lindenmeyer M, Cohen CD, Schlondorff D, Bottinger EP. Mpv17 in mitochondria protects podocytes against mitochondrial dysfunction and apoptosis in vivo and in vitro. Am J Physiol Renal Physiol 2014; 306:F1372-80. [PMID: 24598802 DOI: 10.1152/ajprenal.00608.2013] [Citation(s) in RCA: 40] [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
Mitochondrial dysfunction is increasingly recognized as contributing to glomerular diseases, including those secondary to mitochondrial DNA (mtDNA) mutations and deletions. Mitochondria maintain cellular redox and energy homeostasis and are a major source of intracellular reactive oxygen species (ROS) production. Mitochondrial ROS accumulation may contribute to stress-induced mitochondrial dysfunction and apoptosis and thereby to glomerulosclerosis. In mice, deletion of the gene encoding Mpv17 is associated with glomerulosclerosis, but the underlying mechanism remains poorly defined. Here we report that Mpv17 localizes to mitochondria of podocytes and its expression is reduced in several glomerular injury models and in human focal segmental glomerulosclerosis (FSGS) but not in minimal change disease. Using models of mild or severe nephrotoxic serum nephritis (NTSN) in Mpv17(+/+) wild-type (WT) and Mpv17(-/-) knockout mice, we found that Mpv17 deficiency resulted in increased proteinuria (mild NTSN) and renal insufficiency (severe NTSN) compared with WT. These lesions were associated with increased mitochondrial ROS generation and mitochondrial injury such as oxidative DNA damage. In vitro, podocytes with loss of Mpv17 function were characterized by increased susceptibility to apoptosis and ROS injury including decreased mitochondrial function, loss of mtDNA content, and change in mitochondrial configuration. In summary, the inner mitochondrial membrane protein Mpv17 in podocytes is essential for the maintenance of mitochondrial homeostasis and protects podocytes against oxidative stress-induced injury both in vitro and in vivo.
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Affiliation(s)
- Gabriela Casalena
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Stefanie Krick
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Ilse Daehn
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Liping Yu
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Wenjun Ju
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Shaolin Shi
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Su-yi Tsai
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Vivette D'Agati
- Department of Pathology, Columbia University, College of Physicians and Surgeons, New York, New York; and
| | - Maja Lindenmeyer
- Division of Nephrology and Institute of Physiology with Center of Integrative Human Physiology, University Hospital and University of Zurich, Zurich, Switzerland
| | - Clemens D Cohen
- Division of Nephrology and Institute of Physiology with Center of Integrative Human Physiology, University Hospital and University of Zurich, Zurich, Switzerland
| | - Detlef Schlondorff
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Erwin P Bottinger
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York; Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, New York;
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29
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Utsunomiya Y, Omura K, Yokoo T, Imasawa T, Kawamura T, Abe A, Hirano K, Mitarai T, Maruyama N, Sakai O. Macrophage-colony stimulating factor (M-CSF) enhances proteinuria and recruitment of macrophages into the glomerulus in experimental murine nephritis. Clin Exp Immunol 1996; 106:286-96. [PMID: 8918575 PMCID: PMC2200600 DOI: 10.1046/j.1365-2249.1996.d01-831.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In this study, we examined the effects of macrophage-colony stimulating factor (M-CSF) on glomerular macrophages in lipopolysaccharide (LPS)-induced murine nephritis. Mice injected intraperitoneally with either M-CSF plus LPS, LPS alone, M-CSF alone or saline every day for 8 days were examined for the degree of urine albumin excretion and lymphocyte-function associated antigen-1-positive (LFA-1+) cells in peripheral blood as well as renal pathology. From our results, LPS or M-CSF combined with LPS emphasized the degree of proteinuria, glomerular deposition of immunoglobulins and mesangial proliferation, associated with accumulation of macrophages in the glomeruli. However, in immunohistological examination of kidneys from these nephritic mice, neither intercellular adhesion molecule-1 (ICAM-1), which may play an important role in the recruitment of macrophages into glomeruli, M-CSF receptor nor the number of LFA-1+ cells in peripheral blood was enhanced by M-CSF. On the other hand, M-CSF alone induced neither proteinuria nor any pathological changes and did not increase the number of glomerular Mac-1+ cells above that in saline-treated controls. These results indicate that M-CSF does not directly cause glomerulonephritis but might participate in accelerating the glomerular inflammatory process by stimulating a potent chemoattractant to recruit monocytes-macrophages into the glomeruli.
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Affiliation(s)
- Y Utsunomiya
- Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan
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