1
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Bonadio JD, Bashiri G, Halligan P, Kegel M, Ahmed F, Wang K. Delivery technologies for therapeutic targeting of fibronectin in autoimmunity and fibrosis applications. Adv Drug Deliv Rev 2024; 209:115303. [PMID: 38588958 PMCID: PMC11111362 DOI: 10.1016/j.addr.2024.115303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/29/2024] [Accepted: 04/03/2024] [Indexed: 04/10/2024]
Abstract
Fibronectin (FN) is a critical component of the extracellular matrix (ECM) contributing to various physiological processes, including tissue repair and immune response regulation. FN regulates various cellular functions such as adhesion, proliferation, migration, differentiation, and cytokine release. Alterations in FN expression, deposition, and molecular structure can profoundly impact its interaction with other ECM proteins, growth factors, cells, and associated signaling pathways, thus influencing the progress of diseases such as fibrosis and autoimmune disorders. Therefore, developing therapeutics that directly target FN or its interaction with cells and other ECM components can be an intriguing approach to address autoimmune and fibrosis pathogenesis.
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Affiliation(s)
- Jacob D Bonadio
- Department of Bioengineering, Temple University, Philadelphia, PA, United States
| | - Ghazal Bashiri
- Department of Bioengineering, Temple University, Philadelphia, PA, United States
| | - Patrick Halligan
- Department of Bioengineering, Temple University, Philadelphia, PA, United States
| | - Michael Kegel
- Department of Bioengineering, Temple University, Philadelphia, PA, United States
| | - Fatima Ahmed
- Department of Bioengineering, Temple University, Philadelphia, PA, United States
| | - Karin Wang
- Department of Bioengineering, Temple University, Philadelphia, PA, United States.
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2
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Amano H, Inoue T, Kusano T, Fukaya D, Kosakai W, Okada H. Module 4-Deficient CCN2/Connective Tissue Growth Factor Attenuates the Progression of Renal Fibrosis via Suppression of Focal Adhesion Kinase Phosphorylation in Tubular Epithelial Cells. Mol Cell Biol 2023; 43:515-530. [PMID: 37746701 PMCID: PMC10569360 DOI: 10.1080/10985549.2023.2253130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 08/08/2023] [Indexed: 09/26/2023] Open
Abstract
CCN2/connective tissue growth factor (CTGF) potentially serves as a therapeutic target for chronic kidney disease. Here we investigated CCN2 module-4, encoded by Ccn2 exon 5, through the generation of Ccn2 exon 5 knockout mice (Ex5-/- mice). To investigate renal fibrosis pathogenesis, Ex5-/- mice were employed to model unilateral ureteral obstruction (UUO), unilateral ischemic-reperfusion injury (UIRI), and 5/6 nephrectomy. Interstitial fibrosis was significantly attenuated in the Ex5-/- mice in the three models. Furthermore, phosphorylated focal adhesion kinase (FAK) levels in tubular epithelial cells were significantly lower in the kidneys of the UUO- and UIRI-Ex5-/- mice than those of the Ex5+/+ mice. Moreover, CCN2 module 4-mediated renal tubule FAK and promoted fibrosis. These findings indicate that CCN2 module-4-FAK pathway components will serve as therapeutic targets for effectively attenuating renal fibrosis.
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Affiliation(s)
- Hiroaki Amano
- Department of Nephrology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Tsutomu Inoue
- Department of Nephrology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Takeru Kusano
- General Internal Medicine, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Daichi Fukaya
- Department of Nephrology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Wakako Kosakai
- Department of Nephrology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
| | - Hirokazu Okada
- Department of Nephrology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
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3
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Nørregaard R, Mutsaers HAM, Frøkiær J, Kwon TH. Obstructive nephropathy and molecular pathophysiology of renal interstitial fibrosis. Physiol Rev 2023; 103:2827-2872. [PMID: 37440209 PMCID: PMC10642920 DOI: 10.1152/physrev.00027.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 07/05/2023] [Accepted: 07/09/2023] [Indexed: 07/14/2023] Open
Abstract
The kidneys play a key role in maintaining total body homeostasis. The complexity of this task is reflected in the unique architecture of the organ. Ureteral obstruction greatly affects renal physiology by altering hemodynamics, changing glomerular filtration and renal metabolism, and inducing architectural malformations of the kidney parenchyma, most importantly renal fibrosis. Persisting pathological changes lead to chronic kidney disease, which currently affects ∼10% of the global population and is one of the major causes of death worldwide. Studies on the consequences of ureteral obstruction date back to the 1800s. Even today, experimental unilateral ureteral obstruction (UUO) remains the standard model for tubulointerstitial fibrosis. However, the model has certain limitations when it comes to studying tubular injury and repair, as well as a limited potential for human translation. Nevertheless, ureteral obstruction has provided the scientific community with a wealth of knowledge on renal (patho)physiology. With the introduction of advanced omics techniques, the classical UUO model has remained relevant to this day and has been instrumental in understanding renal fibrosis at the molecular, genomic, and cellular levels. This review details key concepts and recent advances in the understanding of obstructive nephropathy, highlighting the pathophysiological hallmarks responsible for the functional and architectural changes induced by ureteral obstruction, with a special emphasis on renal fibrosis.
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Affiliation(s)
- Rikke Nørregaard
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Renal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | | | - Jørgen Frøkiær
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Tae-Hwan Kwon
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Taegu, Korea
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4
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Yokoi H, Toda N, Mukoyama M. Generation of Conditional KO Mice of CCN2 and Its Function in the Kidney. Methods Mol Biol 2023; 2582:391-409. [PMID: 36370365 DOI: 10.1007/978-1-0716-2744-0_27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
CCN2 has been shown to be closely involved in the progression of renal fibrosis, indicating the potential of CCN2 inhibition as a therapeutic target. Although the examination of the renal disease phenotypes of adult CCN2 knockout mice has yielded valuable scientific insights, perinatal death has limited studies of CCN2 in vivo. Conditional knockout technology has become widely used to delete genes in the target cell populations or time points using cell-specific Cre recombinase-expressing mice. Therefore, several lines of CCN2-floxed mice have been developed to assess the functional role of CCN2 in adult mice.CCN2 levels are elevated in renal fibrosis and proliferative glomerulonephritis, making them suitable disease models for assessing the effects of CCN2 deletion on the kidney. Renal fibrosis is characterized by glomerulosclerosis and tubulointerstitial fibrosis and transforming growth factor-β. CCN2 is increased in fibrosis and modulates a number of downstream signaling pathways involved in the fibrogenic properties of TGF-β. Unilateral ureteral obstruction is one of the most widely used models of renal tubulointerstitial fibrosis. In addition, anti-glomerular basement membrane antibody glomerulonephritis has become the most widely used model for evaluating the effect of increased renal CCN2 expression. Herein, we describe the construction of CCN2-floxed mice and inducible systemic CCN2 conditional knockout mice and methods for the operation of unilateral ureteral obstruction and the induction of anti-glomerular basement membrane antibody glomerulonephritis.
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Affiliation(s)
- Hideki Yokoi
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Naohiro Toda
- Department of Nephrology, Kansai Electric Power Hospital, Osaka, Japan
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Masashi Mukoyama
- Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
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Mok H, Al-Jumaily A, Lu J. Plasmacytoma Variant Translocation 1 (PVT1) Gene as a Potential Novel Target for the Treatment of Diabetic Nephropathy. Biomedicines 2022; 10:2711. [PMID: 36359234 PMCID: PMC9687488 DOI: 10.3390/biomedicines10112711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/08/2022] [Accepted: 10/21/2022] [Indexed: 01/29/2024] Open
Abstract
Introduction: Diabetic nephropathy (DN), a severe microvascular complication in patients with diabetes, is clinically characterized by progressive decline in glomerular filtration rate (GFR). DN is the most common cause of end-stage renal disease (ESRD), and has a consistently high mortality rate. Despite the fact that the prevalence of DN is increasing worldwide, the molecular mechanism underlying the pathogenesis of DN is not fully understood. Previous studies indicated PVT1 as a key determinant of ESRD as well as a mediator of extracellular matrix (ECM) accumulation in vitro. More investigations into the role of PVT1 in DN development are needed. Objectives: To study the effect of PVT1 silencing on progression of DN in diabetic male C57BL/6 mice at early, intermediate and relatively advanced ages. Methods: Diabetic mice were treated with either scramble-siRNA (DM + siRNA (scramble)) or PVT1-siRNA (DM + siRNA (PVT1)), whereas the control mice were normal mice without siRNA injection (Control). Blood, urine and kidney were collected at the age of 9 (young), 16 (middle-aged) or 24 (old) weeks old. Kidney function, histology and molecular gene expression were evaluated. Results: Our findings showed that silencing of PVT1 reduced kidney hypertrophy, proteinuria (UAE, UACR, UPE, UPCR), serum creatinine, serum TGF-β1, serum insulin decline, glomerular and mesangial areas, and increased creatinine clearance in diabetic mice to levels closer to the age-matched controls. Also, silencing of PVT1 markedly suppressed the upregulation of PAI-1, TGF-β1, FN1, COL4A1, and downregulation of BMP7. Conclusion: Silencing of PVT1 ameliorates DN in terms of kidney function and histology in diabetic mice. The renoprotection is attributed to the reduction in ECM accumulation, TGF-β1 elevation and insulin decline. PVT1 is suggested to play an important role in ECM accumulation which makes it a possible target for the treatment of DN.
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Affiliation(s)
- Helen Mok
- School of Science, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland 1142, New Zealand
| | - Ahmed Al-Jumaily
- School of Engineering, Computer and Mathematical Sciences, Faculty of Design and Creative Technologies, Auckland University of Technology, Auckland 1142, New Zealand
| | - Jun Lu
- School of Science, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland 1142, New Zealand
- Maurice Wilkins Centre for Molecular Discovery, Auckland 1142, New Zealand
- College of Food Science and Technology, Nanchang University, Nanchang 330031, China
- College of Food Engineering and Nutrition Sciences, Shaanxi Normal University, Xi’an 710119, China
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, China
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Kubota S, Kawata K, Hattori T, Nishida T. Molecular and Genetic Interactions between CCN2 and CCN3 behind Their Yin-Yang Collaboration. Int J Mol Sci 2022; 23:ijms23115887. [PMID: 35682564 PMCID: PMC9180607 DOI: 10.3390/ijms23115887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/19/2022] [Accepted: 05/19/2022] [Indexed: 12/15/2022] Open
Abstract
Cellular communication network factor (CCN) 2 and 3 are the members of the CCN family that conduct the harmonized development of a variety of tissues and organs under interaction with multiple biomolecules in the microenvironment. Despite their striking structural similarities, these two members show contrastive molecular functions as well as temporospatial emergence in living tissues. Typically, CCN2 promotes cell growth, whereas CCN3 restrains it. Where CCN2 is produced, CCN3 disappears. Nevertheless, these two proteins collaborate together to execute their mission in a yin–yang fashion. The apparent functional counteractions of CCN2 and CCN3 can be ascribed to their direct molecular interaction and interference over the cofactors that are shared by the two. Recent studies have revealed the mutual negative regulation systems between CCN2 and CCN3. Moreover, the simultaneous and bidirectional regulatory system of CCN2 and CCN3 is also being clarified. It is of particular note that these regulations were found to be closely associated with glycolysis, a fundamental procedure of energy metabolism. Here, the molecular interplay and metabolic gene regulation that enable the yin–yang collaboration of CCN2 and CCN3 typically found in cartilage development/regeneration and fibrosis are described.
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Theret M, Low M, Rempel L, Li FF, Tung LW, Contreras O, Chang CK, Wu A, Soliman H, Rossi FMV. In vitro assessment of anti-fibrotic drug activity does not predict in vivo efficacy in murine models of Duchenne muscular dystrophy. Life Sci 2021; 279:119482. [PMID: 33891939 DOI: 10.1016/j.lfs.2021.119482] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/22/2021] [Accepted: 04/02/2021] [Indexed: 02/09/2023]
Abstract
AIM Fibrosis is the most common complication from chronic diseases, and yet no therapy capable of mitigating its effects is available. Our goal is to unveil specific signaling regulating the fibrogenic process and to identify potential small molecule candidates that block fibrogenic differentiation of fibro/adipogenic progenitors. METHOD We performed a large-scale drug screen using muscle-resident fibro/adipogenic progenitors from a mouse model expressing EGFP under the Collagen1a1 promotor. We first confirmed that the EGFP was expressed in response to TGFβ1 stimulation in vitro. Then we treated cells with TGFβ1 alone or with drugs from two libraries of known compounds. The drugs ability to block the fibrogenic differentiation was quantified by imaging and flow cytometry. From a two-rounds screening, positive hits were tested in vivo in the mice model for the Duchenne Muscular Dystrophy (mdx mice). The histopathology of the muscles was assessed with picrosirius red (fibrosis) and laminin staining (myofiber size). KEY FINDINGS From the in vitro drug screening, we identified 21 drugs and tested 3 in vivo on the mdx mice. None of the three drugs significantly improved muscle histopathology. SIGNIFICANCE The in vitro drug screen identified various efficient compounds, none of them strongly inhibited fibrosis in skeletal muscle of mdx mice. To explain these observations, we hypothesize that in Duchenne Muscular Dystrophy, in which fibrosis is a secondary event due to chronic degeneration and inflammation, the drugs tested could have adverse effect on regeneration or inflammation, balancing off any positive effects and leading to the absence of significant results.
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Affiliation(s)
- Marine Theret
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Marcela Low
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Lucas Rempel
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Fang Fang Li
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Lin Wei Tung
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Osvaldo Contreras
- Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; Departamento de Biología Celular y Molecular and Center for Aging and Regeneration (CARE-ChileUC), Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, 8331150 Santiago, Chile
| | - Chih-Kai Chang
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Andrew Wu
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Hesham Soliman
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada; Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences, Minia University, Minia, Egypt
| | - Fabio M V Rossi
- School of Biomedical Engineering and the Biomedical Research Centre, Department of Medical Genetics, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
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Lim JH, Oh EJ, Oh SH, Jung HY, Choi JY, Cho JH, Park SH, Kim YL, Kim CD. Renoprotective Effects of Alpha-1 Antitrypsin against Tacrolimus-Induced Renal Injury. Int J Mol Sci 2020; 21:ijms21228628. [PMID: 33207690 PMCID: PMC7696546 DOI: 10.3390/ijms21228628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/09/2020] [Accepted: 11/13/2020] [Indexed: 11/16/2022] Open
Abstract
The protective effects of alpha-1 antitrypsin (AAT) in tacrolimus (TAC)-induced renal injury was evaluated in a rat model. The TAC group rats were subcutaneously injected with 2 mg/kg TAC every day for four weeks. The TAC with AAT group was cotreated with daily subcutaneous injections of TAC and intraperitoneal injections of AAT (80 mg/kg) for four weeks. The effects of AAT on TAC-induced renal injury were evaluated using serum biochemistry, histopathology, and Western blotting. The TAC injection significantly increased renal interstitial fibrosis, inflammation, and apoptosis as compared to the control treatment. The histopathological examination showed that cotreatment of TAC and AAT attenuated interstitial fibrosis (collagen, fibronectin, and α-SMA staining), and α-SMA expression in Western blotting was also decreased. Immunohistochemical staining for inflammation (osteopontin and ED-1 staining) revealed improved interstitial inflammation in the TAC with AAT group compared to that in the TAC group. The TAC treatment increased renal apoptosis compared to the control treatment, based on the results of increased immunohistochemical staining of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL), increased caspase-3 activity, and lower Bcl-2 to Bad expression ratio. However, AAT cotreatment significantly changed these markers and consequently showed decreased apoptosis. AAT protects against TAC-induced renal injury via antifibrotic, anti-inflammatory, and antiapoptotic effects.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Chan-Duck Kim
- Correspondence: ; Tel.: +82-53-200-5560; Fax: +82-53-426-2046
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Mao L, Liu L, Zhang T, Wu X, Zhang T, Xu Y. MKL1 mediates TGF-β-induced CTGF transcription to promote renal fibrosis. J Cell Physiol 2019; 235:4790-4803. [PMID: 31637729 DOI: 10.1002/jcp.29356] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/30/2019] [Indexed: 12/20/2022]
Abstract
Aberrant fibrogenesis impairs the architectural and functional homeostasis of the kidneys. It also predicts poor diagnosis in patients with end-stage renal disease (ESRD). Renal tubular epithelial cells (RTEC) can trans-differentiate into myofibroblasts to produce extracellular matrix proteins and contribute to renal fibrosis. Connective tissue growth factor (CTGF) is a cytokine upregulated in RTECs during renal fibrosis. In the present study, we investigated the regulation of CTGF transcription by megakaryocytic leukemia 1 (MKL1). Genetic deletion or pharmaceutical inhibition of MKL1 in mice mitigated renal fibrosis following the unilateral ureteral obstruction procedure. Notably, MKL1 deficiency in mice downregulated CTGF expression in the kidneys. Likewise, MKL1 knockdown or inhibition in RTEs blunted TGF-β induced CTGF expression. Further, it was discovered that MKL1 bound directly to the CTGF promoter by interacting with SMAD3 to activate CTGF transcription. In addition, MKL1 mediated the interplay between p300 and WDR5 to regulate CTGF transcription. CTGF knockdown dampened TGF-β induced pro-fibrogenic response in RTEs. MKL1 activity was reciprocally regulated by CTGF. In conclusion, we propose that targeting the MKL1-CTGF axis may generate novel therapeutic solutions against aberrant renal fibrogenesis.
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Affiliation(s)
- Lei Mao
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Li Liu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Tianyi Zhang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xiaoyan Wu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China.,The Laboratory Center for Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Tao Zhang
- Department of Geriatric Nephrology, Jiangsu Province Hospital, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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10
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Chen HA, Chen CM, Guan SS, Chiang CK, Wu CT, Liu SH. The antifibrotic and anti-inflammatory effects of icariin on the kidney in a unilateral ureteral obstruction mouse model. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 59:152917. [PMID: 30978648 DOI: 10.1016/j.phymed.2019.152917] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 03/09/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND The pathology change of renal tubulointerstitial fibrosis is a critical feature of chronic kidney disease (CKD), regardless of the primary insults. The infiltration of inflammatory cells and the consecutive secretion of profibrotic factors are frequently and conspicuously observed during the development of renal fibrosis. Icariin, an active polyphenol of the Epimedium genus, has been found to alleviate the symptoms of chronic diseases like diabetes, neurodegeneration, and heart and renal diseases. The effect and mechanism of icariin on the prevention of CKD-associated renal fibrosis still needed clarification. PURPOSE The aims of this study were to investigate whether icariin treatment improves the development of CKD-associated renal fibrosis and its possible mechanism. METHODS An experimental unilateral ureteral obstruction (UUO)-induced chronic renal fibrosis mouse model was used. Mice were orally administered with icariin (20 mg/kg/day) for 3 consecutive days before and 14 consecutive days after UUO surgery. RESULTS The pathological changes, collagen deposition, and protein expressions of profibrotic factors (transforming growth factor-β and connective tissue growth factor) and fibrotic markers (α-smooth muscle actin and fibronectin), which were significantly elevated in the kidneys of UUO mice, could be significantly reversed by icariin treatment. Icariin treatment also significantly inhibited the increased Smad2/3 and decreased E-cadherin protein expressions in the kidneys of UUO mice. Icariin treatment prominently mitigated the protein expression of proinflammatory factors like nuclear factor-κB, cyclooxygenase-2, interleukin 1-β and prooxidative enzyme (NADPH oxidase-4), and it increased the protein expression of antioxidative enzymes (superoxide dismutase and catalase). CONCLUSION Icariin treatment protects against CKD-associated renal fibrosis via its antifibrotic and anti-inflammatory properties. Icariin may serve as a therapeutic agent in the prevention of CKD-associated renal fibrosis.
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Affiliation(s)
- Hsin-An Chen
- Graduate Institute of Clinical Medicine and Department of Surgery, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Surgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Chang-Mu Chen
- Department of Surgery, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
| | - Siao-Syun Guan
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Chih-Kang Chiang
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Integrated Diagnostics & Therapeutics, College of Medicine and Hospital, National Taiwan University, Taipei, Taiwan
| | - Cheng-Tien Wu
- Department of Surgery, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan.
| | - Shing-Hwa Liu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan; Department of Paediatrics, National Taiwan University Hospital, Taipei, Taiwan.
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11
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Polat EC, Besiroglu H, Ozcan L, Otunctemur A, Eruyar AT, Somay A, Ozbay N, Cekmen M, Eraldemir C, Ozbek E. Beneficial effects of Oltipraz, nuclear factor - erythroid - 2 - related factor 2 (Nrf2), on renal damage in unilateral ureteral obstruction rat model. Int Braz J Urol 2019; 44:1243-1251. [PMID: 30130014 PMCID: PMC6442183 DOI: 10.1590/s1677-5538.ibju.2018.0232] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 07/16/2018] [Indexed: 02/06/2023] Open
Abstract
Introduction: We investigated whether Oltipraz (OPZ) attenuated renal fibrosis in a unilateral ureteral obstruction (UUO) rat model. Materials and Methods: We randomly divided 32 rats into four groups, each consisting of eight animals as follows: Rats in group 1 underwent a sham operation and received no treatment. Rats in group 2 underwent a sham operation and received OPZ. Rats in group 3 underwent unilateral ureteral ligation and received no treatment. Group 4 rats were subjected to unilateral ureteral ligation plus OPZ administration. Transforming growth factor beta-1 (TGF-β1), E-cadherin, nitric oxide (NO) and hydroxyproline levels were measured. Histopathological and immunohistochemical examinations were carried out. Results: TGF-β1, NO and E-cadherin levels in the UUO group were significantly higher than the sham group and these values were significantly different in treated groups compared to the UUO group. In rats treated with UUO + OPZ, despite the presence of mild tubular degeneration and less severe tubular necrosis, glomeruli maintained a better morphology when compared to the UUO group. Expressions of α-SMA in immunohistochemistry showed that the staining positivity decreased in the tubules of the OPZ-treated group. Conclusions: While the precise mechanism of action remains unknown, our results demonstrated that OPZ exerted a protective role in the UUO-mediated renal fibrosis rat model highlighting a promising therapeutic potency of Nrf2-activators for alleviating the detrimental effects of unilateral obstruction in kidneys.
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Affiliation(s)
- Emre Can Polat
- Department of Urology, Okmeydani Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Huseyin Besiroglu
- Department of Urology, Catalca Ilyas Cokay State Hospital, Istanbul, Turkey
| | - Levent Ozcan
- Department of Urology, Derince Training and Research Hospital, University of Health Sciences, Kocaeli, Turkey
| | - Alper Otunctemur
- Department of Urology, Okmeydani Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Ahmet Tugrul Eruyar
- Department of Pathology, Derince Training and Research Hospital, University of Health Sciences, Kocaeli, Turkey
| | - Adnan Somay
- Department of Pathology, Fatih Sultan Mehmet Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Nurver Ozbay
- Department of Pathology, Fatih Sultan Mehmet Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Mustafa Cekmen
- Department of Biochemistry, Istanbul Medeniyet University, Istanbul, Turkey
| | - Ceyla Eraldemir
- Department of Biochemistry, Kocaeli University, Kocaeli, Turkey
| | - Emin Ozbek
- Department of Urology, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
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12
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Modulatory effects of fibronectin on calcium oxalate crystallization, growth, aggregation, adhesion on renal tubular cells, and invasion through extracellular matrix. J Biol Inorg Chem 2019; 24:235-246. [PMID: 30701361 DOI: 10.1007/s00775-019-01641-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 12/09/2018] [Indexed: 12/29/2022]
Abstract
Fibronectin, an extracellular matrix (ECM) protein, has been thought to be involved in pathogenic mechanisms of kidney stone disease, especially calcium oxalate (CaOx) type. Nevertheless, its precise roles in modulation of CaOx crystal remained unclear. We thus performed a systematic evaluation of effects of fibronectin on CaOx monohydrate (COM) crystal (the major causative chemical crystal in kidney stone formation) in various stages of kidney stone pathogenesis, including crystallization, crystal growth, aggregation, adhesion onto renal tubular cells, and invasion through ECM in renal interstitium. The data showed that fibronectin significantly decreased crystallization, growth and adhesive capability of COM crystals in a dose-dependent manner. In contrast, COM crystal aggregation and invasion through ECM migration chamber were significantly enhanced by fibronectin in a dose-dependent fashion. Sequence analysis revealed three calcium-binding and six oxalate-binding domains in fibronectin. Immunofluorescence study confirmed binding of fibronectin to COM crystals. Additionally, calcium- and oxalate-affinity assays confirmed depletion of both calcium and oxalate ions after incubation with fibronectin. Moreover, calcium-saturated and oxalate-saturated forms of fibronectin markedly reduced the modulatory activities of fibronectin on COM crystallization, crystal growth, aggregation, and adhesion onto the cells. These data strongly indicate the dual functions of fibronectin, which serves as an inhibitor for COM crystallization, crystal growth and adhesion onto renal tubular cells, but on the other hand, acts as a promoter for COM crystal aggregation and invasion through ECM. Finally, its COM crystal modulatory activities are most likely mediated through binding with calcium and oxalate ions on the crystals and in their environment.
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13
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Spensley KJ, Tam FWK. From Renal Biomarkers to Therapeutic Targets: The Use of Monocyte Chemoattractant Protein 1, Transforming Growth Factor-Beta, and Connective Tissue Growth Factor in Diabetic Nephropathy and Antineutrophil Cytoplasmic Antibody-Associated Vasculitis. EUROPEAN MEDICAL JOURNAL 2018. [DOI: 10.33590/emj/10310232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In an ideal world, every condition would have a sensitive and specific marker that could be measured in a noninvasive or minimally invasive way. Instead, the medical community depends on invasive biomarkers, which carry inherent risks, to make a diagnosis and plan treatment. In this review article, the current state of research into biomarkers for a range of kidney diseases is discussed, beginning with those biomarkers that are already in clinical use and then moving to conditions for which no validated biomarker yet exists. This review focusses on diabetic nephropathy at the proteinuric end of the spectrum and antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis at the nephritic end. An interesting feature is that the same biomarker, monocyte chemoattractant protein-1 (MCP-1, also known as CCL2), has been identified as a potential target in both conditions, which suggests a shared pathogenic process that results in two very distinct clinical presentations. One of the major limiting features of research into this area, particularly for ANCA-associated vasculitis, is the recruitment of a sufficient number of patients to generate strong enough evidence to justify the biomarker’s routine use; this overlap in biomarkers may enable research in one condition to be applied more generally. In addition to their role as biomarkers, these molecules are also therapeutic targets, and some early research has been carried out to investigate this. Overall, this review brings together research from diverse fields to focus attention on the outstanding areas and the future areas that warrant further investigation.
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Affiliation(s)
- Katrina J. Spensley
- Renal and Vascular Inflammation Section, Department of Medicine, Imperial College London, Hammersmith Hospital, London, UK
| | - Frederick W. K. Tam
- Renal and Vascular Inflammation Section, Department of Medicine, Imperial College London, Hammersmith Hospital, London, UK
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14
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Ramazani Y, Knops N, Elmonem MA, Nguyen TQ, Arcolino FO, van den Heuvel L, Levtchenko E, Kuypers D, Goldschmeding R. Connective tissue growth factor (CTGF) from basics to clinics. Matrix Biol 2018; 68-69:44-66. [DOI: 10.1016/j.matbio.2018.03.007] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/05/2018] [Accepted: 03/06/2018] [Indexed: 02/07/2023]
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15
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March JT, Golshirazi G, Cernisova V, Carr H, Leong Y, Lu-Nguyen N, Popplewell LJ. Targeting TGFβ Signaling to Address Fibrosis Using Antisense Oligonucleotides. Biomedicines 2018; 6:biomedicines6030074. [PMID: 29941814 PMCID: PMC6164894 DOI: 10.3390/biomedicines6030074] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 12/29/2022] Open
Abstract
Fibrosis results from the excessive accumulation of extracellular matrix in chronically injured tissue. The fibrotic process is governed by crosstalk between many signaling pathways. The search for an effective treatment is further complicated by the fact that there is a degree of tissue-specificity in the pathways involved, although the process is not completely understood for all tissues. A plethora of drugs have shown promise in pre-clinical models, which is not always borne out translationally in clinical trial. With the recent approvals of two antisense oligonucleotides for the treatment of the genetic diseases Duchenne muscular dystrophy and spinal muscular atrophy, we explore here the potential of antisense oligonucleotides to knockdown the expression of pro-fibrotic proteins. We give an overview of the generalized fibrotic process, concentrating on key players and highlight where antisense oligonucleotides have been used effectively in cellular and animal models of different fibrotic conditions. Consideration is given to the advantages antisense oligonucleotides would have as an anti-fibrotic therapy alongside factors that would need to be addressed to improve efficacy. A prospective outlook for the development of antisense oligonucleotides to target fibrosis is outlined.
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Affiliation(s)
- James T March
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Golnoush Golshirazi
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Viktorija Cernisova
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Heidi Carr
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Yee Leong
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Ngoc Lu-Nguyen
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
| | - Linda J Popplewell
- Centre for Gene and Cell Therapy, School of Biological Sciences, Royal Holloway-University of London, Egham, Surrey TW20 0EX, UK.
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16
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Blanchard O, Stepanovska B, Starck M, Erhardt M, Römer I, Meyer Zu Heringdorf D, Pfeilschifter J, Zangemeister-Wittke U, Huwiler A. Downregulation of the S1P Transporter Spinster Homology Protein 2 (Spns2) Exerts an Anti-Fibrotic and Anti-Inflammatory Effect in Human Renal Proximal Tubular Epithelial Cells. Int J Mol Sci 2018; 19:ijms19051498. [PMID: 29772789 PMCID: PMC5983760 DOI: 10.3390/ijms19051498] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/14/2018] [Accepted: 05/15/2018] [Indexed: 01/09/2023] Open
Abstract
Sphingosine kinase (SK) catalyses the formation of sphingosine 1-phosphate (S1P), which acts as a key regulator of inflammatory and fibrotic reactions, mainly via S1P receptor activation. Here, we show that in the human renal proximal tubular epithelial cell line HK2, the profibrotic mediator transforming growth factor β (TGFβ) induces SK-1 mRNA and protein expression, and in parallel, it also upregulates the expression of the fibrotic markers connective tissue growth factor (CTGF) and fibronectin. Stable downregulation of SK-1 by RNAi resulted in the increased expression of CTGF, suggesting a suppressive effect of SK-1-derived intracellular S1P in the fibrotic process, which is lost when SK-1 is downregulated. In a further approach, the S1P transporter Spns2, which is known to export S1P and thereby reduces intracellular S1P levels, was stably downregulated in HK2 cells by RNAi. This treatment decreased TGFβ-induced CTGF and fibronectin expression, and it abolished the strong induction of the monocyte chemotactic protein 1 (MCP-1) by the pro-inflammatory cytokines tumor necrosis factor (TNF)α and interleukin (IL)-1β. Moreover, it enhanced the expression of aquaporin 1, which is an important water channel that is expressed in the proximal tubules, and reverted aquaporin 1 downregulation induced by IL-1β/TNFα. On the other hand, overexpression of a Spns2-GFP construct increased S1P secretion and it resulted in enhanced TGFβ-induced CTGF expression. In summary, our data demonstrate that in human renal proximal tubular epithelial cells, SK-1 downregulation accelerates an inflammatory and fibrotic reaction, whereas Spns2 downregulation has an opposite effect. We conclude that Spns2 represents a promising new target for the treatment of tubulointerstitial inflammation and fibrosis.
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Affiliation(s)
- Olivier Blanchard
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
| | - Bisera Stepanovska
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
| | - Manuel Starck
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
| | - Martin Erhardt
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
| | - Isolde Römer
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt am Main, Goethe-University, Theodor-Stern Kai 7, D-60590 Frankfurt am Main, Germany.
| | - Dagmar Meyer Zu Heringdorf
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt am Main, Goethe-University, Theodor-Stern Kai 7, D-60590 Frankfurt am Main, Germany.
| | - Josef Pfeilschifter
- Institute of General Pharmacology and Toxicology, University Hospital Frankfurt am Main, Goethe-University, Theodor-Stern Kai 7, D-60590 Frankfurt am Main, Germany.
| | - Uwe Zangemeister-Wittke
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
| | - Andrea Huwiler
- Institute of Pharmacology, University of Bern, Inselspital, INO-F, CH-3010 Bern, Switzerland.
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17
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Thakur R, Sharma A, Lingaraju MC, Begum J, Kumar D, Mathesh K, Kumar P, Singh TU, Kumar D. Ameliorative effect of ursolic acid on renal fibrosis in adenine-induced chronic kidney disease in rats. Biomed Pharmacother 2018; 101:972-980. [PMID: 29635907 DOI: 10.1016/j.biopha.2018.02.143] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 02/27/2018] [Accepted: 02/27/2018] [Indexed: 12/18/2022] Open
Abstract
Ursolic acid (UA), an ursane-type pentacyclic triterpenoid commonly found in apple peels and holy basil has been shown to possess many beneficial effects. Renal fibrosis is a complication of kidney injury and associated with increased risk of morbidity and mortality. In our previous investigation, a lupane-type pentacyclic triterpenoid, betulinic acid (BA) was found to have protective effect on chronic kidney disease (CKD) and renal fibrosis. This prompted us to explore the therapeutic value of UA, a chemically related compound to BA in CKD. CKD was induced by feeding adenine with the feed at a concentration of 0.75% for 28 days. UA at the dose rate of 30 mg/kg in 0.5% carboxy methyl cellulose (CMC) was administered by oral route, simultaneously with adenine feeding for 28 days. Adenine feeding increased the kidney weight to body weight index, decreased the kidney function due to injury as indicated by increased markers like serum urea, uric acid, creatinine, cystatin C and neutrophil gelatinase-associated lipocalin (NGAL) and initiated the fibrotic response in kidney by increasing the profibrotic proteins viz. transforming growth factor-beta (TGF-β), connective tissue growth factor (CTGF), fibronectin and collagen. However, treatment with UA reversed the damage induced by adenine as shown by reduced kidney injury and fibrosis markers which was further clearly evident in histological picture indicating the suitability of UA for use in CKD.
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Affiliation(s)
- Richa Thakur
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Anshuk Sharma
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Madhu C Lingaraju
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India.
| | - Jubeda Begum
- Department of Veterinary Microbiology, College of Veterinary & Animal Sciences, G. B. Pant University of Agriculture and Technology, Pantnagar, 263153, UK, India
| | - Dhirendra Kumar
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Karikalan Mathesh
- Centre for Wildlife Conservation Management and Disease Surveillance, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Pawan Kumar
- Division of Pathology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Thakur Uttam Singh
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
| | - Dinesh Kumar
- Division of Pharmacology and Toxicology, Indian Veterinary Research Institute, Izatnagar, 243 122, UP, India
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18
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Type 1 diabetes mellitus induces structural changes and molecular remodelling in the rat kidney. Mol Cell Biochem 2018; 449:9-25. [DOI: 10.1007/s11010-018-3338-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 02/17/2018] [Indexed: 12/24/2022]
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19
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Rayego-Mateos S, Morgado-Pascual JL, Rodrigues-Diez RR, Rodrigues-Diez R, Falke LL, Mezzano S, Ortiz A, Egido J, Goldschmeding R, Ruiz-Ortega M. Connective tissue growth factor induces renal fibrosis via epidermal growth factor receptor activation. J Pathol 2018; 244:227-241. [PMID: 29160908 DOI: 10.1002/path.5007] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 10/20/2017] [Accepted: 11/14/2017] [Indexed: 01/04/2023]
Abstract
Connective tissue growth factor (CCN2/CTGF) is a matricellular protein that is overexpressed in progressive human renal diseases, mainly in fibrotic areas. In vitro studies have demonstrated that CCN2 regulates the production of extracellular matrix (ECM) proteins and epithelial-mesenchymal transition (EMT), and could therefore contribute to renal fibrosis. CCN2 blockade ameliorates experimental renal damage, including diminution of ECM accumulation. We have reported that CCN2 and its C-terminal degradation product CCN2(IV) bind to epidermal growth factor receptor (EGFR) to modulate renal inflammation. However, the receptor involved in CCN2 profibrotic actions has not been described so far. Using a murine model of systemic administration of CCN2(IV), we have unveiled a fibrotic response in the kidney that was diminished by EGFR blockade. Additionally, in conditional CCN2 knockout mice, renal fibrosis elicited by folic acid-induced renal damage was prevented, and this was linked to inhibition of EGFR pathway activation. Our in vitro studies demonstrated a direct effect of CCN2 via the EGFR pathway on ECM production by fibroblasts and the induction of EMT in tubular epithelial cells. Our studies clearly show that the EGFR regulates CCN2 fibrotic signalling in the kidney, and suggest that EGFR pathway blockade could be a potential therapeutic option to block CCN2-mediated profibrotic effects in renal diseases. Copyright © 2017 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Sandra Rayego-Mateos
- Cellular Biology in Renal Diseases Laboratory. School of Medicine, Universidad Autónoma Madrid, Madrid, Spain
| | - José Luis Morgado-Pascual
- Cellular Biology in Renal Diseases Laboratory. School of Medicine, Universidad Autónoma Madrid, Madrid, Spain
| | | | - Raquel Rodrigues-Diez
- Cellular Biology in Renal Diseases Laboratory. School of Medicine, Universidad Autónoma Madrid, Madrid, Spain
| | - Lucas L Falke
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Sergio Mezzano
- Division of Nephrology, School of Medicine, Universidad Austral de Chile, Valdivia, Chile
| | - Alberto Ortiz
- IIS-Fundación Jiménez Díaz-UAM, School of Medicine, UAM, Madrid, Spain
| | - Jesús Egido
- IIS-Fundación Jiménez Díaz-UAM, School of Medicine, UAM, Madrid, Spain.,Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Madrid, Spain
| | - Roel Goldschmeding
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marta Ruiz-Ortega
- Cellular Biology in Renal Diseases Laboratory. School of Medicine, Universidad Autónoma Madrid, Madrid, Spain
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20
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Varadaraj A, Magdaleno C, Mythreye K. Deoxycholate Fractionation of Fibronectin (FN) and Biotinylation Assay to Measure Recycled FN Fibrils in Epithelial Cells. Bio Protoc 2018; 8:e2972. [PMID: 30370316 DOI: 10.21769/bioprotoc.2972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Fibronectin (FN) is an extracellular matrix protein that is secreted by many cell types and binds predominantly to the cell surface receptor Integrin α5β1. Integrin α5β1 binding initiates the step-wise assembly of FN into fibrils, a process called fibrillogenesis. We and several others have demonstrated critical effects of fibrillogenesis on cell migration and metastasis. While immunostaining and microscopy methods help visualize FN incorporation into fibrils, with each fibril being at least 3 μm in length, the first study that developed a method to biochemically fractionate FN to quantify fibril incorporated FN was published by Jean Schwarzbauer's group in 1996. Our protocol was adapted from the original publication, and has been tested on multiple cell types including as shown here in MCF10A mammary epithelial and Caki-1 renal cancer epithelial cells. Using two detergent extractions, cellular FN is separated into detergent insoluble or fibril incorporated FN and soluble FN or unincorporated fractions. To determine whether fibrillogenesis utilizes a recycled pool of FN, we have used a Biotin labeled FN (FN-Biotin) recycling assay, that has been modified from a previous study. Using a combination of the recycling assay and deoxycholate fractionation methods, one can quantitatively demonstrate the extent of fibrillogenesis in cells under different experimental conditions and determine the source of FN for fibrillogenesis.
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Affiliation(s)
- Archana Varadaraj
- Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, USA
| | - Carina Magdaleno
- Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, USA
| | - Karthikeyan Mythreye
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, USA.,Department of Drug Chemistry and Biochemistry, University of South Carolina, Columbia, USA
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21
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Liu SH, Wu CT, Huang KH, Wang CC, Guan SS, Chen LP, Chiang CK. C/EBP homologous protein (CHOP) deficiency ameliorates renal fibrosis in unilateral ureteral obstructive kidney disease. Oncotarget 2017; 7:21900-12. [PMID: 26942460 PMCID: PMC5008332 DOI: 10.18632/oncotarget.7870] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/23/2016] [Indexed: 12/21/2022] Open
Abstract
Renal tubulointerstitial fibrosis is an important pathogenic feature in chronic kidney disease and end-stage renal disease, regardless of the initiating insults. A recent study has shown that CCAAT/enhancer binding protein (C/EBP) homologous protein (CHOP) is involved in acute ischemia/reperfusion-related acute kidney injury through oxidative stress induction. However, the influence of CHOP on chronic kidney disease-correlated renal fibrosis remains unclear. Here, we investigated the role of CHOP in unilateral ureteral obstruction (UUO)-induced experimental chronic tubulointerstital fibrosis. The CHOP knockout and wild type mice with or without UUO were used. The results showed that the increased expressions of renal fibrosis markers collagen I, fibronectin, α-smooth muscle actin, and plasminogen activator inhibitor-1 in the kidneys of UUO-treated wild type mice were dramatically attenuated in the kidneys of UUO-treated CHOP knockout mice. CHOP deficiency could also ameliorate lipid peroxidation and endogenous antioxidant enzymes depletion, tubular apoptosis, and inflammatory cells infiltration in the UUO kidneys. These results suggest that CHOP deficiency not only attenuates apoptotic death and oxidative stress in experimental renal fibrosis, but also reduces local inflammation, leading to diminish UUO-induced renal fibrosis. Our findings support that CHOP may be an important signaling molecule in the progression of chronic kidney disease.
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Affiliation(s)
- Shing-Hwa Liu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Pediatrics, College of Medicine, National Taiwan University & Hospital, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Cheng-Tien Wu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kuo-How Huang
- Department of Urology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Ching-Chia Wang
- Department of Pediatrics, College of Medicine, National Taiwan University & Hospital, Taipei, Taiwan
| | - Siao-Syun Guan
- Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan, Taiwan
| | - Li-Ping Chen
- Department of Dentistry, Taipei Chang Gang Memorial Hospital, Chang Gang University, Taipei, Taiwan
| | - Chih-Kang Chiang
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Integrated Diagnostics & Therapeutics, National Taiwan University Hospital, Taipei, Taiwan
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22
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Mamuya FA, Xie D, Lei L, Huang M, Tsuji K, Capen DE, Yang B, Weissleder R, Păunescu TG, Lu HAJ. Deletion of β1-integrin in collecting duct principal cells leads to tubular injury and renal medullary fibrosis. Am J Physiol Renal Physiol 2017; 313:F1026-F1037. [PMID: 28701310 DOI: 10.1152/ajprenal.00038.2017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 06/19/2017] [Accepted: 07/11/2017] [Indexed: 11/22/2022] Open
Abstract
The renal collecting duct (CD) contains two major cell types, intercalated (ICs) and principal cells (PCs). A previous report showed that deletion of β1-integrin in the entire renal CD causes defective CD morphogenesis resulting in kidney dysfunction. However, subsequent deletion of β1-integrin specifically in ICs and PCs, respectively, did not cause any morphological defects in the CDs. The discrepancy between these studies prompts us to reinvestigate the role of β1-integrin in CD cells, specifically in the PCs. We conditionally deleted β1-integrin in mouse CD PCs using a specific aquaporin-2 (AQP2) promoter Cre-LoxP system. The resulting mutant mice, β-1f/fAQP2-Cre+, had lower body weight, failed to thrive, and died around 8-12 wk. Their CD tubules were dilated, and some of them contained cellular debris. Increased apoptosis and proliferation of PCs were observed in the dilated CDs. Trichrome staining and electron microscopy revealed the presence of peritubular and interstitial fibrosis that is associated with increased production of extracellular matrix proteins including collagen type IV and fibronectin, as detected by immunoblotting. Further analysis revealed a significantly increased expression of transforming growth factor-β (TGF-β)-induced protein, fibronectin, and TGF-β receptor-1 mRNAs and concomitantly increased phosphorylation of SMAD-2 that indicates the activation of the TGF-β signaling pathway. Therefore, our data reveal that normal expression of β1-integrin in PCs is a critical determinant of CD structural and functional integrity and further support the previously reported critical role of β1-integrin in the development and/or maintenance of the CD structure and function.
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Affiliation(s)
- Fahmy A Mamuya
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Dongping Xie
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Department of Physiology, Tongji University School of Medicine, Shanghai, China; and
| | - Lei Lei
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Ming Huang
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Kenji Tsuji
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Diane E Capen
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts
| | - BaoXue Yang
- Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Teodor G Păunescu
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Hua A Jenny Lu
- Program in Membrane Biology and Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts; .,Center for Systems Biology, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
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23
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Purohit T, Qin Z, Quan C, Lin Z, Quan T. Smad3-dependent CCN2 mediates fibronectin expression in human skin dermal fibroblasts. PLoS One 2017; 12:e0173191. [PMID: 28267785 PMCID: PMC5340390 DOI: 10.1371/journal.pone.0173191] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 02/16/2017] [Indexed: 01/12/2023] Open
Abstract
The potential involvement of connective tissue growth factor (CCN2/CTGF) in extracellular matrix (ECM) production is recognized. However, the role CCN2 in fibronectin (FN) gene expression has remained incompletely understood and even controversial. Here we report that CCN2 is absolutely necessary for FN expression in primary human skin dermal fibroblasts, the major cells responsible for ECM production in skin. Gain- and loss-of-function approaches demonstrate that CCN2 is an essential component of FN expression in both basal and stimulation by TGF-β signaling, the major regulator of FN expression. CCN2 is significantly induced by Smad3, a critical mediator of TGF-β signaling. CCN2 acts as a downstream mediator of TGF-β/Smad signaling and acting synergistically with TGF-β to regulate FN gene expression. Finally, we observed that CCN2 and FN predominantly expressed in the dermis of normal human skin, stromal tissues of skin squamous cell carcinoma (SCC), and simultaneously induced in wounded human skin in vivo. These findings provide evidence that CCN2 is responsible for mediating the stimulatory effects of TGF-β/Smad on FN gene expression, and attenuation of CCN2 expression may benefit to reduce fibrotic ECM microenvironment in disease skin.
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Affiliation(s)
- Trupta Purohit
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Zhaoping Qin
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Chunji Quan
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji, China
| | - Zhenhua Lin
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji, China
| | - Taihao Quan
- Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
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Toda N, Mori K, Kasahara M, Ishii A, Koga K, Ohno S, Mori KP, Kato Y, Osaki K, Kuwabara T, Kojima K, Taura D, Sone M, Matsusaka T, Nakao K, Mukoyama M, Yanagita M, Yokoi H. Crucial Role of Mesangial Cell-derived Connective Tissue Growth Factor in a Mouse Model of Anti-Glomerular Basement Membrane Glomerulonephritis. Sci Rep 2017; 7:42114. [PMID: 28191821 PMCID: PMC5304211 DOI: 10.1038/srep42114] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/06/2017] [Indexed: 11/16/2022] Open
Abstract
Connective tissue growth factor (CTGF) coordinates the signaling of growth factors and promotes fibrosis. Neonatal death of systemic CTGF knockout (KO) mice has hampered analysis of CTGF in adult renal diseases. We established 3 types of CTGF conditional KO (cKO) mice to investigate a role and source of CTGF in anti-glomerular basement membrane (GBM) glomerulonephritis. Tamoxifen-inducible systemic CTGF (Rosa-CTGF) cKO mice exhibited reduced proteinuria with ameliorated crescent formation and mesangial expansion in anti-GBM nephritis after induction. Although CTGF is expressed by podocytes at basal levels, podocyte-specific CTGF (pod-CTGF) cKO mice showed no improvement in renal injury. In contrast, PDGFRα promoter-driven CTGF (Pdgfra-CTGF) cKO mice, which predominantly lack CTGF expression by mesangial cells, exhibited reduced proteinuria with ameliorated histological changes. Glomerular macrophage accumulation, expression of Adgre1 and Ccl2, and ratio of M1/M2 macrophages were all reduced both in Rosa-CTGF cKO and Pdgfra-CTGF cKO mice, but not in pod-CTGF cKO mice. TGF-β1-stimulated Ccl2 upregulation in mesangial cells and macrophage adhesion to activated mesangial cells were decreased by reduction of CTGF. These results reveal a novel mechanism of macrophage migration into glomeruli with nephritis mediated by CTGF derived from mesangial cells, implicating the therapeutic potential of CTGF inhibition in glomerulonephritis.
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Affiliation(s)
- Naohiro Toda
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Kiyoshi Mori
- School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan.,Department of Nephrology and Kidney Research, Shizuoka General Hospital, Shizuoka, Japan
| | - Masato Kasahara
- Institute for Clinical and Translational Science, Nara Medical University Hospital, Kashihara, Japan
| | - Akira Ishii
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Kenichi Koga
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Shoko Ohno
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Keita P Mori
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Yukiko Kato
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Keisuke Osaki
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Takashige Kuwabara
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan.,Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Katsutoshi Kojima
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto, Japa
| | - Daisuke Taura
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto, Japa
| | - Masakatsu Sone
- Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University, Kyoto, Japa
| | - Taiji Matsusaka
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Japan
| | - Kazuwa Nakao
- Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Masashi Mukoyama
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan.,Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
| | - Motoko Yanagita
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
| | - Hideki Yokoi
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto Japan
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Toda N, Yokoi H, Mori K, Mukoyama M. Production and Analysis of Conditional KO Mice of CCN2 in Kidney. Methods Mol Biol 2017; 1489:377-390. [PMID: 27734390 DOI: 10.1007/978-1-4939-6430-7_31] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
CCN2 has been shown to be closely involved in the progression of renal fibrosis, indicating the potential of CCN2 inhibition as a therapeutic target. Although the examination of the phenotypes of adult CCN2 knockout mice with renal diseases has yielded valuable scientific insights, perinatal death has limited studies of CCN2 in vivo. Conditional knockout technology has become widely used for the deletion of genes in the desired cell populations and time points through the use of cell-specific Cre recombinase-expressing mice. Accordingly, several lines of CCN2 floxed mice have been developed for the assessment of the functional role of CCN2 in adult mice.CCN2 levels are increased in renal fibrosis and proliferative glomerulonephritis, which represent good disease models for evaluating the effects of CCN2 deletion on the kidney. Of these, anti-glomerular basement membrane antibody glomerulonephritis has become the most widely used model for evaluating the effect of increased renal CCN2 expression. Herein, we describe the construction of CCN2 floxed mice and inducible systemic CCN2 conditional knockout mice and methods for the induction of anti-glomerular basement membrane antibody glomerulonephritis.
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Affiliation(s)
- Naohiro Toda
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, 606-8507, Japan
| | - Hideki Yokoi
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, 606-8507, Japan.
| | - Kiyoshi Mori
- School of Phamaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Masashi Mukoyama
- Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, 606-8507, Japan.,Department of Nephrology, Kumamoto University Graduate School of Medical Sciences, Kumamoto, Japan
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26
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Lin CH, Wang YH, Chen YW, Lin YL, Chen BC, Chen MC. Transcriptional and posttranscriptional regulation of CXCL8/IL-8 gene expression induced by connective tissue growth factor. Immunol Res 2016; 64:369-84. [PMID: 26071024 DOI: 10.1007/s12026-015-8670-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Connective tissue growth factor (CTGF), a CCN family member, is a secreted protein regulating cellular functions, including fibrosis, apoptosis, adhesion, migration, differentiation, proliferation, angiogenesis, and chondrogenesis. CTGF increases proinflammatory factor production; however, inflammatory cytokine regulation by CTGF is poorly understood. The aim of this study was to identify novel biological functions and elucidate the functional mechanisms of CTGF. Specifically, the study focused on the ability of CTGF-primed monocytes to secrete interleukin 8 (CXCL8/IL-8) and determined the signaling pathways involved in CTGF-induced CXCL8/IL-8 gene regulation during inflammation. We transfected wild-type or mutant CXCL8/IL-8 promoter-derived luciferase reporter constructs into 293T cells to examine the effect of CTGF on the CXCL8/IL-8 promoter. The results showed that the activator protein-1 and nuclear factor κB binding sites of the CXCL8/IL-8 promoter are essential for CTGF-induced CXCL8/IL-8 transcription. Moreover, the CTGF-induced activation of p38 mitogen-activated protein kinase (MAPK), c-Jun-N-terminal kinase, and extracellular signal-regulated kinase (ERK) is involved in this process. In addition, adenosine-uridine-rich elements (AREs) of the CXCL8/IL-8 3'-untranslated region (3'-UTR) reduce CXCL8/IL-8 mRNA stability. To investigate whether CTGF regulates CXCL8/IL-8 gene expression at the posttranscriptional level, we transfected 293 cells with serial luciferase constructs containing different segments of the CXCL8/IL-8 3'-UTR and then stimulated the cells with CTGF. The results suggested that CTGF stabilized luciferase mRNA and increased luciferase activity by regulating the CXCL8/IL-8 3'-UTR. Moreover, the p38 MAPK pathway may contribute to CTGF-induced CXCL8/IL-8 mRNA stabilization.
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Affiliation(s)
- Chien-Huang Lin
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yuan-Hung Wang
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Medical Research, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Yu-Wen Chen
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Liang Lin
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Bing-Chang Chen
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Mei-Chieh Chen
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan.
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei, 110, Taiwan.
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27
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Shen YL, Liu HJ, Sun L, Niu XL, Kuang XY, Wang P, Hao S, Huang WY. Response gene to complement 32 regulates the G2/M phase checkpoint during renal tubular epithelial cell repair. Cell Mol Biol Lett 2016; 21:19. [PMID: 28536621 PMCID: PMC5415738 DOI: 10.1186/s11658-016-0021-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/10/2016] [Indexed: 12/17/2022] Open
Abstract
Background The aim of this study was to evaluate the influence of RGC-32 (response gene to complement 32) on cell cycle progression in renal tubular epithelial cell injury. Methods NRK-52E cells with overexpressed or silenced RGC-32 were constructed via transient transfection with RGC-32 expression plasmid and RGC-32 siRNA plasmid, and the cell cycle distribution was determined. The expression levels of fibrosis factors, including smooth muscle action (α-SMA), fibronectin (FN) and E-cadherin, were assessed in cells with silenced RGC-32. Results The cells were injured via TNF-α treatment, and the injury was detectable by the enhanced expression of neutrophil gelatinase-associated lipocalin (NGAL). RGC-32 expression also increased significantly. The number of cells at G2/M phase increased dramatically in RGC-32 silenced cells, indicating that RGC-32 silencing induced G2/M arrest. In addition, after treatment with TNF-α, the NRK-52E cells with silenced RGC-32 showed significantly increased expression of α-SMA and FN, but decreased expression of E-cadherin. Conclusions The results of this study suggest that RGC-32 probably has an important impact on the repair process of renal tubular epithelial cells in vitro by regulating the G2/M phase checkpoint, cell fibrosis and cell adhesion. However, the exact mechanism needs to be further elucidated.
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Affiliation(s)
- Yun-Lin Shen
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Hua-Jie Liu
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Lei Sun
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Xiao-Ling Niu
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Xin-Yu Kuang
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Ping Wang
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Sheng Hao
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
| | - Wen-Yan Huang
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, 200062 China
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High glucose-induced cytoplasmic translocation of Dnmt3a contributes to CTGF hypo-methylation in mesangial cells. Biosci Rep 2016; 36:BSR20160141. [PMID: 27364355 PMCID: PMC4974599 DOI: 10.1042/bsr20160141] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 06/28/2016] [Indexed: 01/16/2023] Open
Abstract
Connective tissue growth factor (CTGF) plays an essential role in the pathogenesis of diabetic nephropathy and we have previously identified that high glucose induced the expression of CTGF by decreasing DNA methylation. The aim of the present study was to investigate the underlying mechanisms of the high glucose-induced CTGF hypo-methylation. Human glomerular mesangial cells (hMSCs) were treated with low glucose (5 mM), mannitol (30 mM) or high glucose (30 mM) respectively. Immunofluorescence staining, real-time quantitative PCR and western blotting were performed to determine the subcellular distribution and expression of CTGF and Dnmt3a. ChIP-PCR assay was applied to investigate the capability of Dnmt3a to bind the CpG island of CTGF. Our results showed that high glucose induced both mRNA and protein expressions of CTGF, and led to increased cytoplasmic translocation of Dnmt3a in cultured hMSCs. The nuclear Dnmt3a protein was significantly reduced after high glucose treatment, although the expression of total Dnmt3a protein was not altered. We further discovered that ERK/MAPK signalling contributed to the high glucose-induced cytoplasmic translocation of Dnmt3a. Consequently, less Dnmt3a protein was bound to the CpG island of CTGF promoter, which induced an increase in CTGF expression by epigenetic regulation in the presence of high glucose. In conclusion, high glucose induces cytoplasmic translocation of Dnmt3a, possibly through activating ERK/MAPK signalling pathway, which contributes to the decreased binding of Dnmt3a on CTGF promoter and the subsequent CTGF hypo-methylation in diabetic nephropathy.
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29
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Qiao X, Wang L, Wang Y, Zhao N, Zhang R, Han W, Peng Z. Intermedin is upregulated and attenuates renal fibrosis by inhibition of oxidative stress in rats with unilateral ureteral obstruction. Nephrology (Carlton) 2016; 20:820-31. [PMID: 26014968 DOI: 10.1111/nep.12520] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2015] [Indexed: 01/13/2023]
Abstract
AIM Transforming growth factor-β1 (TGF-β1) plays a pivotal role in the progression of renal fibrosis. Reactive oxygen species mediate profibrotic action of TGF-β1. Intermedin (IMD) has been shown to inhibit oxidative stress, but its role in renal fibrosis remains unclear. Here, we investigated the effects of IMD on renal fibrosis in a rat model of unilateral ureteral obstruction (UUO). METHODS The expression of IMD and its receptors, calcitonin receptor-like receptor (CRLR) and receptor activity-modifying proteins (RAMP1/2/3), in the obstructed kidney was detected by real-time polymerase chain reaction (PCR), western blotting and immunohistochemistry. To evaluate the effects of IMD on renal fibrosis, we locally overexpressed exogenous IMD in the obstructed kidney using an ultrasound-microbubble-mediated delivery system. Renal fibrosis was determined by Masson trichrome staining. The expression of TGF-β1, connective tissue growth factor (CTGF), α-smooth muscle actin (α-SMA) and fibronectin was measured. Smad2/3 activation and macrophage infiltration were evaluated. We also studied oxidative stress by measuring superoxide dismutase (SOD) activity and malondialdehyde (MDA) content. RESULTS mRNA and protein expression of IMD increased after UUO. CRLR, RAMP1, RAMP2 and RAMP3 were also induced by ureteral obstruction. IMD overexpression remarkably attenuated UUO-induced tubular injury and blunted fibrotic response as shown by decreased interstitial collagen deposition and downregulation of fibronectin. Macrophage infiltration, α-SMA and CTGF upregulation caused by UUO were all relieved by IMD, whereas TGF-β1 upregulation and Smad2/3 activation were not affected. Meanwhile, we noted increased oxidative stress in obstruction, which was also attenuated by IMD gene delivery. CONCLUSIONS Our results indicate that IMD is upregulated after UUO. IMD plays a protective role in renal fibrosis via its antioxidant effects.
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Affiliation(s)
- Xi Qiao
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.,Shanxi Kidney Disease Institute, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Lihua Wang
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.,Shanxi Kidney Disease Institute, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yanhong Wang
- Department of Microbiology and Immunology, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ning Zhao
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ruijing Zhang
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Weixia Han
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zhiqiang Peng
- Department of Nephrology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.,Shanxi Kidney Disease Institute, Shanxi Medical University, Taiyuan, Shanxi, China
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30
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Angiopoietin-like protein 2 increases renal fibrosis by accelerating transforming growth factor-β signaling in chronic kidney disease. Kidney Int 2016; 89:327-41. [DOI: 10.1016/j.kint.2015.12.021] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 09/16/2015] [Accepted: 10/07/2015] [Indexed: 01/08/2023]
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31
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Koga K, Yokoi H, Mori K, Kasahara M, Kuwabara T, Imamaki H, Ishii A, Mori KP, Kato Y, Ohno S, Toda N, Saleem MA, Sugawara A, Nakao K, Yanagita M, Mukoyama M. MicroRNA-26a inhibits TGF-β-induced extracellular matrix protein expression in podocytes by targeting CTGF and is downregulated in diabetic nephropathy. Diabetologia 2015; 58:2169-80. [PMID: 26063197 DOI: 10.1007/s00125-015-3642-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 04/29/2015] [Indexed: 12/11/2022]
Abstract
AIMS/HYPOTHESIS The accumulation of extracellular matrix (ECM) is a characteristic of diabetic nephropathy, and is partially caused by profibrotic proteins TGF-β and connective tissue growth factor (CTGF). We aimed to identify microRNAs (miRNAs) targeting CTGF on podocytes in diabetic nephropathy. METHODS We investigated miRNAs targeting CTGF on podocytes with miRNA array analysis and identified a candidate miRNA, miR-26a. Using overexpression and silencing of miR-26a in cultured podocytes, we examined changes of ECM and its host genes. We further investigated glomerular miR-26a expression in humans and in mouse models of diabetic nephropathy. RESULTS miR-26a, which was downregulated by TGF-β1, was expressed in glomerular cells including podocytes and in tubules by in situ hybridisation. Glomerular miR-26a expression was downregulated by 70% in streptozotocin-induced diabetic mice. Transfection of miR-26a mimics in cultured human podocytes decreased the CTGF protein level by 50%, and directly inhibited CTGF expression in podocytes, as demonstrated by a reporter assay with the 3'-untranslated region of the CTGF gene. This effect was abolished by a mutant plasmid. miR-26a mimics also inhibited TGF-β1-induced collagen expression, SMAD-binding activity and expression of its host genes CTDSP2 and CTDSPL. Knockdown of CTDSP2 and CTDSPL increased collagen expression in TGF-β-stimulated podocytes, suggesting that host genes also regulate TGF-β/SMAD signalling. Finally, we observed a positive correlation between microdissected glomerular miR-26a expression levels and estimated GFR in patients with diabetic nephropathy. CONCLUSIONS/INTERPRETATION The downregulation of miR-26a is involved in the progression of diabetic nephropathy both in humans and in mice through enhanced TGF-β/CTGF signalling.
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Affiliation(s)
- Kenichi Koga
- Department of Nephrology, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
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32
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Ayasolla KR, Rai P, Rahimipour S, Hussain M, Malhotra A, Singhal PC. Tubular cell phenotype in HIV-associated nephropathy: role of phospholipid lysophosphatidic acid. Exp Mol Pathol 2015; 99:109-15. [PMID: 26079546 DOI: 10.1016/j.yexmp.2015.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 06/12/2015] [Indexed: 11/19/2022]
Abstract
Collapsing glomerulopathy and microcysts are characteristic histological features of HIV-associated nephropathy (HIVAN). We have previously reported the role of epithelial mesenchymal transition (EMT) in the development of glomerular and tubular cell phenotypes in HIVAN. Since persistent tubular cell activation of NFκB has been reported in HIVAN, we now hypothesize that HIV may be contributing to tubular cell phenotype via lysophosphatidic acid (LPA) mediated downstream signaling. Interestingly, LPA and its receptors have also been implicated in the tubular interstitial cell fibrosis (TIF) and cyst formation in autosomal dominant polycystic kidney disease (PKD). Primary human proximal tubular cells (HRPTCs) were transduced with either empty vector (EV/HRPTCs), HIV (HIV/HRPTCs) or treated with LPA (LPA/HRPTC). Immunoelectrophoresis of HIV/HRPTCs and LPA/HRPTCs displayed enhanced expression of pro-fibrotic markers: a) fibronectin (2.25 fold), b) connective tissue growth factor (CTGF; 4.8 fold), c) α-smooth muscle actin (α-SMA; 12 fold), and d) collagen I (5.7 fold). HIV enhanced tubular cell phosphorylation of ILK-1, FAK, PI3K, Akt, ERKs and P38 MAPK. HIV increased tubular cell transcriptional binding activity of NF-κB; whereas, a LPA biosynthesis inhibitor (AACOCF3), a DAG kinase inhibitor, a LPA receptor blocker (Ki16425), a NF-κB inhibitor (PDTC) and NFκB-siRNA not only displayed downregulation of a NFκB activity but also showed attenuated expression of profibrotic/EMT genes in HIV milieu. These findings suggest that LPA could be contributing to HIV-induced tubular cell phenotype via NFκB activation in HIVAN.
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Affiliation(s)
- Kamesh R Ayasolla
- Department of Medicine, Hofstra North-Shore LIJ Medical School, Feinstein Institute for Medical Research, NY, United States
| | - Partab Rai
- Department of Medicine, Hofstra North-Shore LIJ Medical School, Feinstein Institute for Medical Research, NY, United States
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat Gan, Israel
| | | | - Ashwani Malhotra
- Department of Medicine, Hofstra North-Shore LIJ Medical School, Feinstein Institute for Medical Research, NY, United States
| | - Pravin C Singhal
- Department of Medicine, Hofstra North-Shore LIJ Medical School, Feinstein Institute for Medical Research, NY, United States.
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Kim SS, Wen W, Prowse P, Hamilton DW. Regulation of matrix remodelling phenotype in gingival fibroblasts by substratum topography. J Cell Mol Med 2015; 19:1183-96. [PMID: 25766369 PMCID: PMC4459834 DOI: 10.1111/jcmm.12451] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 09/05/2014] [Indexed: 01/09/2023] Open
Abstract
Gingival connective tissue often has a composition resembling that of scar surrounding dental implant abutments. Increased cell adhesion, α-smooth muscle actin (α-SMA) expression and increased extracellular matrix deposition are a hallmark of fibrotic cells, but how topographic features influence gingival fibroblast adhesion and adoption of the α-SMA positive myofibroblast phenotype associated with scarring is unknown. The purpose of the present study was to demonstrate whether implant topographies that limit adhesion formation would reduce myofibroblast differentiation and extracellular matrix deposition. Human gingival fibroblasts were cultured on PT (smooth) and SLA (roughened) titanium discs for varying time-points. At 1 and 2 weeks after seeding, incorporation of α-SMA into stress-fibre bundles and fibronectin deposition was significantly higher on PT than SLA surfaces indicating differentiation of the cells towards a myofibroblast phenotype. Analysis of adhesion formation demonstrated that cells formed larger adhesions and more stable adhesions on PT, with more nascent adhesions observed on SLA. Gene expression analysis identified up-regulation of 15 genes at 24 hrs on SLA versus PT associated with matrix remodelling. Pharmacological inhibition of Src/FAK signalling in gingival fibroblasts on PT reduced fibronectin deposition and CCN2 expression. We conclude that topographical features that reduce focal adhesion stability could be applied to inhibit myofibroblast differentiation in gingival fibroblasts.
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Affiliation(s)
- Shawna S Kim
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
| | - Weiyan Wen
- Division of Oral Biology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
| | - Paul Prowse
- Graduate Program of Biomedical Engineering, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
| | - Douglas W Hamilton
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada.,Division of Oral Biology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada.,Graduate Program of Biomedical Engineering, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
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Kim MH, Jung SY, Ahn J, Hwang SG, Woo HJ, An S, Nam SY, Lim DS, Song JY. Quantitative proteomic analysis of single or fractionated radiation-induced proteins in human breast cancer MDA-MB-231 cells. Cell Biosci 2015; 5:2. [PMID: 26056562 PMCID: PMC4459121 DOI: 10.1186/2045-3701-5-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 12/02/2014] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Radiotherapy is widely used to treat cancer alone or in combination with surgery, chemotherapy, and immunotherapy. However, damage to normal tissues and radioresistance of tumor cells are major obstacles to successful radiotherapy. Furthermore, the immune network around tumors appears to be connected to tumor progression and recurrence. METHODS We investigated the cytosolic proteins produced by irradiated tumor cells by using a quantitative proteomic approach based on stable isotope labeling by amino acids in cell culture. MDA-MB-231 breast cancer cells were treated with a single or fractionated 10 Gray dose of (137)Cs γ-radiation, which was selected based on cell viability. RESULTS Radiation-induced proteins were differentially expressed based on the fractionated times of radiation and were involved in multiple biological functions, including energy metabolism and cytoskeleton organization. We identified 46 proteins increased by at least 1.3-fold, and high ranks were determined for cathepsin D, gelsolin, arginino-succinate synthase 1, peroxiredoxin 5, and C-type mannose receptor 2. CONCLUSION These results suggest that a number of tumor-derived factors upregulated by γ-radiation are promising targets for modulation of the immune response during radiation treatment.
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Affiliation(s)
- Mi-Hyoung Kim
- Division of Radiation Cancer Research, Korea Institute of Radiological & Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706 Korea ; Laboratory of Immunology, College of Veterinary Medicine, Seoul National University, Seoul, Korea
| | - Seung-Youn Jung
- Division of Radiation Cancer Research, Korea Institute of Radiological & Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706 Korea
| | - Jiyeon Ahn
- Division of Radiation Cancer Research, Korea Institute of Radiological & Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706 Korea
| | - Sang-Gu Hwang
- Division of Radiation Cancer Research, Korea Institute of Radiological & Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706 Korea
| | - Hee-Jong Woo
- Laboratory of Immunology, College of Veterinary Medicine, Seoul National University, Seoul, Korea
| | - Sungkwan An
- Department of Microbiological Engineering, Kon-Kuk University, Seoul, Korea
| | - Seon Young Nam
- Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd, Seoul, Korea
| | - Dae-Seog Lim
- Department of Applied Bioscience, CHA University, Gyeonggi-do, Korea
| | - Jie-Young Song
- Division of Radiation Cancer Research, Korea Institute of Radiological & Medical Sciences, 215-4 Gongneung-dong, Nowon-gu, Seoul 139-706 Korea
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Tateishi Y, Osada-Oka M, Tanaka M, Shiota M, Izumi Y, Ishimura E, Motoyama K, Inaba M, Miura K. Myeloid HIF-1 attenuates the progression of renal fibrosis in murine obstructive nephropathy. J Pharmacol Sci 2015; 127:181-9. [DOI: 10.1016/j.jphs.2014.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 11/18/2014] [Accepted: 12/07/2014] [Indexed: 12/19/2022] Open
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Yoon SP, Kim J. Poly(ADP-ribose) polymerase 1 activation links ischemic acute kidney injury to interstitial fibrosis. J Physiol Sci 2015; 65:105-11. [PMID: 25388944 PMCID: PMC10717313 DOI: 10.1007/s12576-014-0346-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 10/20/2014] [Indexed: 02/06/2023]
Abstract
Inactivation of poly(ADP-ribose) polymerase 1 (PARP1) has been found to be protective in several disease models; however, the role of PARP1 in acute kidney injury-induced interstitial fibrosis has not been studied. Herein, we tested whether PARP1 inactivation by treatment with PJ34 (a PARP1 inactivator; 10 mg/kg body weight/day, intraperitoneal implantation of a miniosmotic pump at 2 days after the onset) contributed to the decrease in interstitial fibrosis induced by ischemia-reperfusion injury (IRI) in mouse kidneys. IRI increased PARP1 activation represented by poly(ADP-ribose) expression from 4 to 16 days postinjury, whereas treatment with PJ34 at 2 days after the onset efficaciously abolished the increase in PARP1 activation at 4, 8 and 16 days after IRI. Pharmacological inactivation of PARP1 significantly reduced interstitial fibrosis as represented by the collagen deposition and transforming growth factor-β1 level at 8 and 16 days after IRI. Consistent with collagen deposition, myofibroblast activation represented by α-smooth muscle actin expression was also reduced by PARP1 inactivation at 8 and 16 days after IRI. Furthermore, IRI enhanced macrophage influx, but PARP1 inactivaton remarkably reduced macrophage influx for 4 through 16 days after the injury. Among the chemoattractants for monocytes/macrophages and neutrophils, monocyte chemotactic protein-1 (MCP-1) production in IRI kidneys was significantly reduced by PARP1 inactivation from 4 to 16 days postinjury. These data demonstrate that PARP1 activation contributes to IRI-induced MCP-1 production and in turn to macrophage influx, resulting in the promotion of interstitial fibrosis.
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Affiliation(s)
- Sang Pil Yoon
- Department of Anatomy, Jeju National University School of Medicine, Jeju, 690-756 Republic of Korea
| | - Jinu Kim
- Department of Anatomy, Jeju National University School of Medicine, Jeju, 690-756 Republic of Korea
- Department of Biomedicine and Drug Development, Jeju National University, Jeju, 690-756 Republic of Korea
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Wang S, Li B, Li C, Cui W, Miao L. Potential Renoprotective Agents through Inhibiting CTGF/CCN2 in Diabetic Nephropathy. J Diabetes Res 2015; 2015:962383. [PMID: 26421309 PMCID: PMC4572424 DOI: 10.1155/2015/962383] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 02/28/2015] [Accepted: 03/25/2015] [Indexed: 12/16/2022] Open
Abstract
Diabetic nephropathy (DN) is the leading cause of end-stage renal disease (ESRD). The development and progression of DN might involve multiple factors. Connective tissue growth factor (CCN2, originally known as CTGF) is the one which plays a pivotal role. Therefore, increasing attention is being paid to CCN2 as a potential therapeutic target for DN. Up to date, there are also many drugs or agents which have been shown for their protective effects against DN via different mechanisms. In this review, we only focus on the potential renoprotective therapeutic agents which can specifically abolish CCN2 expression or nonspecifically inhibit CCN2 expression for retarding the development and progression of DN.
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Affiliation(s)
- Songyan Wang
- Department of Nephrology, Second Hospital of Jilin University, Changchun 130041, China
- Department of Nephrology, Jilin Province People's Hospital, Changchun 130021, China
| | - Bing Li
- Department of Nephrology, Jilin Province People's Hospital, Changchun 130021, China
| | - Chunguang Li
- Department of Urology, The 2nd Hospital of Changchun, Changchun 130061, China
| | - Wenpeng Cui
- Department of Nephrology, Second Hospital of Jilin University, Changchun 130041, China
| | - Lining Miao
- Department of Nephrology, Second Hospital of Jilin University, Changchun 130041, China
- *Lining Miao:
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Tubulointerstitial fibrosis in patients with IgG4-related kidney disease: pathological findings on repeat renal biopsy. Rheumatol Int 2014; 35:1093-101. [PMID: 25371379 DOI: 10.1007/s00296-014-3153-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/08/2014] [Indexed: 12/24/2022]
Abstract
Renal parenchymal lesions in patients with IgG4-related kidney disease (IgG4-RKD) are characterized by tubulointerstitial nephritis with storiform fibrosis and infiltration by high numbers of IgG4-positive plasma cells. The aim of this study was to evaluate the clinical and pathological effects of corticosteroid therapy in patients with IgG4-RKD. Of six patients who were diagnosed with IgG4-RKD, four patients underwent re-biopsy at approximately 30-50 days after corticosteroid therapy was initiated. Based on the classification of Yamaguchi et al., the degree of tubulointerstitial fibrosis was classified before and after therapy. In addition, tubulointerstitial expression patterns of α-smooth muscle actin (α-SMA), collagen I, III, and IV protein, and connective tissue growth factor (CTGF) mRNA were examined. Histopathological findings before treatment showed α-SMA-positive myofibroblasts in the lesion, and CTGF mRNA-positive cells were found in the cellular infiltrate. Although corticosteroid therapy improved serum creatinine clinically, the stage of fibrosis advanced pathologically as evidenced by increased staining for collagen I and III. However, the number of IgG4-positive plasma cells decreased, and CTGF mRNA expression reduced. In other words, fibrosis had advanced from the time of extensive cell infiltration in patients with IgG4-RKD and inflammation was relieved by corticosteroid. A reduced number of positive CTGF mRNA expression cells in repeat biopsies indicated that the fibrosis process was terminated by corticosteroid therapy. We propose that corticosteroid therapy could terminate the pathway of active fibrosis, thereby inhibiting progression to renal dysfunction.
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Chang JW, Tsai HL, Chen CW, Yang HW, Yang AH, Yang LY, Wang PS, Ng YY, Lin TL, Lee OK. Conditioned mesenchymal stem cells attenuate progression of chronic kidney disease through inhibition of epithelial-to-mesenchymal transition and immune modulation. J Cell Mol Med 2014; 16:2935-49. [PMID: 22862802 PMCID: PMC4393722 DOI: 10.1111/j.1582-4934.2012.01610.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Accepted: 07/24/2012] [Indexed: 12/21/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have been shown to improve the outcome of acute renal injury models; but whether MSCs can delay renal failure in chronic kidney disease (CKD) remains unclear. In the present study, the were cultured in media containing various concentrations of basic fibroblast growth factor, epidermal growth factor and ascorbic acid 2-phosphate to investigate whether hepatocyte growth factor (HGF) secretion could be increased by the stimulation of these growth factors. Then, TGF-β1-treated renal interstitial fibroblast (NRK-49F), renal proximal tubular cells (NRK-52E) and podocytes were co-cultured with conditioned MSCs in the absence or presence of ascorbic acid 2-phosphate to quantify the protective effects of conditioned MSCs on renal cells. Moreover, male Sprague-Dawley rats were treated with 1 × 106 conditioned MSCs immediately after 5/6 nephrectomy and every other week through the tail vein for 14 weeks. It was found that basic fibroblast growth factor, epidermal growth factor and ascorbic acid 2-phosphate promoted HGF secretion in MSCs. Besides, conditioned MSCs were found to be protective against TGF-β1 induced epithelial-to-mesenchymal transition of NRK-52E and activation of NRK-49F cells. Furthermore, conditioned MSCs protected podocytes from TGF-β1-induced loss of synaptopodin, fibronectin induction, cell death and apoptosis. Rats transplanted with conditioned human MSCs had a significantly increase in creatinine clearance rate, decrease in glomerulosclerosis, interstitial fibrosis and increase in CD4+CD25+Foxp3+ regulatory T cells counts in splenocytes. Together, our studies indicated that conditioned MSCs preserve renal function by their anti-fibrotic and anti-inflammatory effects. Transplantation of conditioned MSCs may be useful in treating CKD.
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Affiliation(s)
- Jei-Wen Chang
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
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Urinary connective tissue growth factor is associated with human renal allograft fibrogenesis. Transplantation 2013; 96:494-500. [PMID: 23803600 DOI: 10.1097/tp.0b013e31829b07e1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Connective tissue growth factor (CTGF) is a key mediator of tissue fibrogenesis in kidney disease. Its involvement in renal allograft fibrosis was recently demonstrated in a mouse model. METHODS We prospectively studied the association between urinary CTGF (CTGFu) levels and renal allograft fibrosis during the first 2 years after transplantation. Histologic and biochemical data were collected from 315 kidney transplant recipients enrolled in a protocol biopsy-based clinical program. RESULTS At 3, 12, and 24 months after transplantation, CTGFu levels were independently associated with the degree of interstitial fibrosis in protocol biopsies, scored according to the revised 1997 Banff criteria. In a subgroup of 164 patients with pristine biopsies at 3 months, higher CTGFu levels at 3 months were associated with moderate and severe interstitial fibrosis developed at 24 months after transplantation. CONCLUSIONS As it is readily quantifiable in urine, a role for CTGFu as a noninvasive candidate biomarker and predictor of human renal allograft fibrogenesis deserves further study.
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Park J, Lee SY, Ooshima A, Yang KM, Kang JM, Kim YW, Kim SJ. Glucosamine hydrochloride exerts a protective effect against unilateral ureteral obstruction-induced renal fibrosis by attenuating TGF-β signaling. J Mol Med (Berl) 2013; 91:1273-84. [PMID: 24072041 PMCID: PMC3825548 DOI: 10.1007/s00109-013-1086-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/11/2013] [Accepted: 09/04/2013] [Indexed: 12/22/2022]
Abstract
Abstract Renal fibrosis is a common consequence of unilateral ureteral obstruction, which provides a useful model to investigate the pathogenesis of obstructive nephropathy and progressive renal fibrosis. Transforming growth factor (TGF-β1) has been recognized as a key mediator in renal fibrosis by stimulating matrix-producing fibrogenic cells and promoting extracellular matrix deposition. Therefore, considerable efforts have been made to regulate TGF-β signaling for antifibrotic therapy. Here, we investigated the mode of action of glucosamine hydrochloride (GS-HCl) on TGF-β1-induced renal fibrosis. In the obstructed kidneys and TGF-β1-treated renal cells, GS-HCl significantly decreased renal expression of α-smooth muscle actin, collagen I, and fibronectin. By investigating the inhibitory mechanism of GS-HCl on renal fibrosis, we found that GS-HCl suppressed TGF-β signaling by inhibiting N-linked glycosylation of the type II TGF-β receptor (TβRII), leading to an inefficient trafficking of TβRII to the membrane surface. Defective N-glycosylation of TβRII further suppressed the TGF-β1-binding to TβRII, thereby decreasing TGF-β signaling. Notably, GS-HCl treatment significantly reduced TGF-β1-induced up-regulation of Smad2/3 phosphorylation and transcriptional activity in vivo and in vitro. Taken together, GS-HCl-mediated regulation of TGF-β signaling exerted an antifibrotic effect, thereby ameliorating renal fibrosis. Our study suggests that GS-HCl would be a promising agent for therapeutic intervention for preventing TGF-β1-induced renal fibrosis in kidney diseases. Key message Glucosamine-mediated attenuation of TGF-β signaling ameliorates renal fibrosis in vivo TGF-β1-induced fibrogenic action is reduced by glucosamine in vitro N-glycosylation of the type II TGF-β receptor is suppressed by glucosamine Glucosamine-induced defective N-glycosylation of TβRII decreases TGF-β signaling.
Electronic supplementary material The online version of this article (doi:10.1007/s00109-013-1086-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jinah Park
- CHA Cancer Institute, CHA University, 605 Yeoksam-dong, Gangnam-gu, Seoul, 135-081, South Korea
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New therapeutic targets for intraocular pressure lowering. ISRN OPHTHALMOLOGY 2013; 2013:261386. [PMID: 24558600 PMCID: PMC3914177 DOI: 10.1155/2013/261386] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 05/30/2013] [Indexed: 01/08/2023]
Abstract
Primary open-angle glaucoma (POAG) is a leading cause of irreversible and preventable blindness and ocular hypertension is the strongest known risk factor. With current classes of drugs, management of the disease focuses on lowering intraocular pressure (IOP). Despite of their use to modify the course of the disease, none of the current medications for POAG is able to reduce the IOP by more than 25%-30%. Also, some glaucoma patients show disease progression despite of the therapeutics. This paper examines the new described physiological targets for reducing the IOP. The main cause of elevated IOP in POAG is thought to be an increased outflow resistance via the pressure-dependent trabecular outflow system, so there is a crescent interest in increasing trabecular meshwork outflow by extracellular matrix remodeling and/or by modulation of contractility/TM cytoskeleton disruption. Modulation of new agents that act mainly on trabecular meshwork outflow may be the future hypotensive treatment for glaucoma patients. There are also other agents in which modulation may decrease aqueous humour production or increase uveoscleral outflow by different mechanisms from those drugs available for glaucoma treatment. Recently, a role for the ghrelin-GHSR system in the pathophysiology modulation of the anterior segment, particularly regarding glaucoma, has been proposed.
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Ultrastructural and ultraimmunohistochemical changes upon partial nephrectomy and uranyl intoxication in the rat kidney. ACTA ACUST UNITED AC 2013; 65:441-9. [DOI: 10.1016/j.etp.2012.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Revised: 12/19/2011] [Accepted: 01/15/2012] [Indexed: 12/18/2022]
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Lai CF, Chen YM, Chiang WC, Lin SL, Kuo ML, Tsai TJ. Cysteine-rich protein 61 plays a proinflammatory role in obstructive kidney fibrosis. PLoS One 2013; 8:e56481. [PMID: 23457573 PMCID: PMC3574066 DOI: 10.1371/journal.pone.0056481] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 01/14/2013] [Indexed: 12/27/2022] Open
Abstract
Cysteine-rich protein 61 (Cyr61) is a secreted matrix-associated protein that regulates a broad spectrum of biological and cellular activities. This study aimed to investigate the role of Cyr61 in progressive kidney fibrosis induced by unilateral ureteral obstruction (UUO) surgery in mice. The expression of Cyr61 transcripts and proteins in the obstructed kidneys were increased from day 1 and remained high until day 10 after surgery. Immunohistochemistry indicated that Cyr61 was expressed mainly in renal tubular epithelial cells. The upregulated Cyr61 in UUO kidneys was reduced in mice treated with pan-transforming growth factor-β (TGF-β) antibody. The role of TGF-β in tubular Cyr61 upregulation after obstructive kidney injury was further supported by experiments showing that TGF-β1 stimulated Cyr61 expression in cultured tubular epithelial cells. Notably, the upregulation of Cyr61 in UUO kidneys was followed by a marked increase in monocyte chemoattractant protein 1 (MCP-1) transcripts and macrophage infiltration, which were attenuated in mice treated with anti-Cyr61 antibodies. This proinflammatory property of Cyr61 in inducing MCP-1 expression was further confirmed in tubular epithelial cells cultured with Cyr61 protein. The anti-Cyr61 antibody in UUO mice also reduced the levels of collagen type 1-α1 transcripts, collagen fibril accumulation evaluated by picrosirius red staining, and the levels of α-smooth muscle actin (α-SMA) transcripts and proteins on day 4 after surgery; however, the antifibrotic effect was not sustained. In conclusion, the TGF-β-mediated increase in tubular Cyr61 expression involved renal inflammatory cell infiltration through MCP-1 induction during obstructive kidney injury. The Cyr61 blockade attenuated kidney fibrosis in the early phase, but the antifibrotic effect could not be sustained.
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Affiliation(s)
- Chun-Fu Lai
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yung-Ming Chen
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital Yun-Lin Branch, Douliou City, Taiwan
| | - Wen-Chih Chiang
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Shuei-Liong Lin
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Min-Liang Kuo
- Graduate Institute of Toxicology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Tun-Jun Tsai
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
- * E-mail:
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Kuwabara T, Mori K, Mukoyama M, Kasahara M, Yokoi H, Saito Y, Ogawa Y, Imamaki H, Kawanishi T, Ishii A, Koga K, Mori KP, Kato Y, Sugawara A, Nakao K. Exacerbation of diabetic nephropathy by hyperlipidaemia is mediated by Toll-like receptor 4 in mice. Diabetologia 2012; 55:2256-66. [PMID: 22610400 DOI: 10.1007/s00125-012-2578-1] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 04/04/2012] [Indexed: 12/24/2022]
Abstract
AIMS/HYPOTHESIS Hyperlipidaemia is an independent risk factor for the progression of diabetic nephropathy, but its molecular mechanism remains elusive. We investigated in mice how diabetes and hyperlipidaemia cause renal lesions separately and in combination, and the involvement of Toll-like receptor 4 (TLR4) in the process. METHODS Diabetes was induced in wild-type (WT) and Tlr4 knockout (KO) mice by intraperitoneal injection of streptozotocin (STZ). At 2 weeks after STZ injection, normal diet was substituted with a high-fat diet (HFD). Functional and histological analyses were carried out 6 weeks later. RESULTS Compared with treatment with STZ or HFD alone, treatment of WT mice with both STZ and HFD markedly aggravated nephropathy, as indicated by an increase in albuminuria, mesangial expansion, infiltration of macrophages and upregulation of pro-inflammatory and extracellular-matrix-associated gene expression in glomeruli. In Tlr4 KO mice, the addition of an HFD to STZ had almost no effects on the variables measured. Production of protein S100 calcium binding protein A8 (calgranulin A; S100A8), a potent ligand for TLR4, was observed in abundance in macrophages infiltrating STZ-HFD WT glomeruli and in glomeruli of diabetic nephropathy patients. High-glucose and fatty acid treatment synergistically upregulated S100a8 gene expression in macrophages from WT mice, but not from KO mice. As putative downstream targets of TLR4, phosphorylation of interferon regulatory factor 3 (IRF3) was enhanced in kidneys of WT mice co-treated with STZ and HFD. CONCLUSIONS/INTERPRETATION Activation of S100A8/TLR4 signalling was elucidated in an animal model of diabetic glomerular injury accompanied with hyperlipidaemia, which may provide novel therapeutic targets in progressive diabetic nephropathy.
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Affiliation(s)
- T Kuwabara
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, 54 Shogoin Kawaharacho, Sakyoku, Kyoto, 606-8507, Japan
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Hübner S, Efthymiadis A. Recent progress in histochemistry and cell biology. Histochem Cell Biol 2012; 137:403-57. [PMID: 22366957 DOI: 10.1007/s00418-012-0933-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2012] [Indexed: 01/06/2023]
Abstract
Studies published in Histochemistry and Cell Biology in the year 2011 represent once more a manifest of established and newly sophisticated techniques being exploited to put tissue- and cell type-specific molecules into a functional context. The review is therefore the Histochemistry and Cell Biology's yearly intention to provide interested readers appropriate summaries of investigations touching the areas of tissue biology, developmental biology, the biology of the immune system, stem cell research, the biology of subcellular compartments, in order to put the message of such studies into natural scientific-/human- and also pathological-relevant correlations.
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Affiliation(s)
- Stefan Hübner
- Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany.
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Hall-Glenn F, De Young RA, Huang BL, van Handel B, Hofmann JJ, Chen TT, Choi A, Ong JR, Benya PD, Mikkola H, Iruela-Arispe ML, Lyons KM. CCN2/connective tissue growth factor is essential for pericyte adhesion and endothelial basement membrane formation during angiogenesis. PLoS One 2012; 7:e30562. [PMID: 22363445 PMCID: PMC3282727 DOI: 10.1371/journal.pone.0030562] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 12/19/2011] [Indexed: 12/13/2022] Open
Abstract
CCN2/Connective Tissue Growth Factor (CTGF) is a matricellular protein that regulates cell adhesion, migration, and survival. CCN2 is best known for its ability to promote fibrosis by mediating the ability of transforming growth factor β (TGFβ) to induce excess extracellular matrix production. In addition to its role in pathological processes, CCN2 is required for chondrogenesis. CCN2 is also highly expressed during development in endothelial cells, suggesting a role in angiogenesis. The potential role of CCN2 in angiogenesis is unclear, however, as both pro- and anti-angiogenic effects have been reported. Here, through analysis of Ccn2-deficient mice, we show that CCN2 is required for stable association and retention of pericytes by endothelial cells. PDGF signaling and the establishment of the endothelial basement membrane are required for pericytes recruitment and retention. CCN2 induced PDGF-B expression in endothelial cells, and potentiated PDGF-B-mediated Akt signaling in mural (vascular smooth muscle/pericyte) cells. In addition, CCN2 induced the production of endothelial basement membrane components in vitro, and was required for their expression in vivo. Overall, these results highlight CCN2 as an essential mediator of vascular remodeling by regulating endothelial-pericyte interactions. Although most studies of CCN2 function have focused on effects of CCN2 overexpression on the interstitial extracellular matrix, the results presented here show that CCN2 is required for the normal production of vascular basement membranes.
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Affiliation(s)
- Faith Hall-Glenn
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - R. Andrea De Young
- Department of Orthopaedic Surgery, University of California Los Angeles, Los Angeles, California, United States of America
| | - Bau-Lin Huang
- Department of Oral Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - Ben van Handel
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - Jennifer J. Hofmann
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America
| | - Tom T. Chen
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - Aaron Choi
- Department of Orthopaedic Surgery, University of California Los Angeles, Los Angeles, California, United States of America
| | - Jessica R. Ong
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - Paul D. Benya
- Department of Orthopaedic Surgery, University of California Los Angeles, Los Angeles, California, United States of America
| | - Hanna Mikkola
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
| | - M. Luisa Iruela-Arispe
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California, United States of America
| | - Karen M. Lyons
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Orthopaedic Surgery, University of California Los Angeles, Los Angeles, California, United States of America
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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Abe Y, Murano M, Murano N, Morita E, Inoue T, Kawakami K, Ishida K, Kuramoto T, Kakimoto K, Okada T, Narabayashi K, Umegaki E, Higuchi K. Simvastatin attenuates intestinal fibrosis independent of the anti-inflammatory effect by promoting fibroblast/myofibroblast apoptosis in the regeneration/healing process from TNBS-induced colitis. Dig Dis Sci 2012; 57:335-44. [PMID: 21909991 DOI: 10.1007/s10620-011-1879-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 08/16/2011] [Indexed: 01/20/2023]
Abstract
BACKGROUND Intestinal deformity and stenosis are induced by fibrosis during the process healing of intestinal chronic inflammation in inflammatory bowel disease (IBD). Potent anti-inflammatory treatment of patients with Crohn's disease (CD) may induce fibrous stenosis, and this is often difficult to treat in clinical practice. Therefore, it is necessary to develop a treatment strategy that concomitantly exhibits repair/regenerative and anti-fibrotic effects, in addition to the current anti-inflammatory effect, for the treatment of inflammatory bowel diseases. However, the relationship between the course of inflammatory activity and the healing process and fibrogenesis has not been elucidated; although the complex involvement of various factors in the mechanism of biological fibrosis has been investigated. Simvastatin (SIMV), an HMG-CoA reductase inhibitor, exhibits anti-inflammatory and anti-fibrotic effects. The current study established a model of the regeneration/healing process from TNBS-induced colitis and investigated the anti-inflammatory and anti-fibrotic effects of SIMV. SUBJECTS AND METHODS Four groups of TNBS-induced colitis model were prepared using male SJL/J mice: A: Normal control group, B: control group, and C and D: treatment groups. The mucosal healing process was classified into three phases (an early phase: inflammation period, a mid-phase: regeneration promoting period, and a late phase: regeneration-converging period), and inflammation, the expression of fibrosis-related growth factors, and induction of apoptosis of fibrosis-related cells were compared in each period. RESULTS (1) The clinical findings showed that SIMV showed anti-inflammatory effects with body weight gain and improvement of epithelial injury in the late phase. Histological (macroscopic/microscopic) improvement was noted in the mid- and late phases. The inflammatory cytokine (TNF-α) level significantly decreased in the mid- and late phases in the high-dose treatment group. (2) SIMV also had anti-fibrotic effects characterized by a dose-dependent decrease in the level of a fibrosis-related growth factor (CTGF) in the early and mid-phases, irrespective of inflammation or changes in the TGF-β(1) level. Dose-dependent induction of apoptosis was noted in both fibroblasts and myofibroblasts from a relatively early stage. CONCLUSIONS The results suggested that SIMV induces anti-fibrotic activity that is not directly involved in the anti-inflammatory effect from a relatively early stage the healing process of TNBS-induced colitis.
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Affiliation(s)
- Yosuke Abe
- 2nd Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan.
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Wang HY, Lin CY, Chien CC, Kan WC, Tian YF, Liao PC, Wu HY, Su SB. Impact of uremic environment on peritoneum: a proteomic view. J Proteomics 2012; 75:2053-63. [PMID: 22266485 DOI: 10.1016/j.jprot.2012.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 11/14/2011] [Accepted: 01/07/2012] [Indexed: 01/29/2023]
Abstract
Peritoneal morphology and function are abnormal in uremia patients, but the contributing mechanisms are unclear. Here we attempted to characterize the protein targets that may be related to peritoneal change in patients with uremia and have not exposed to peritoneal dialysis fluid. Protein profiles of peritoneal fluids collected from patients with uremia and patients with normal renal function receiving laparoscopic cholecystectomy were displayed by two-dimensional gel electrophoresis (2-DE). Altered protein spots were excised and subjected to tryptic digestion followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Sixteen 2-DE protein spots were altered between two groups. Western blots confirmed that kininogen-1, apoptosis inhibitor 2, cat eye syndrome critical region protein 1, and apolipoprotein A-I had higher expression levels in the uremia samples. In contrast, synaptic vesicle 2-related protein, glial fibrillary acidic protein, and envelope glycoprotein (C2-V5 region) showed lower levels. The increased expression may result from a change in the permeability of the peritoneal membrane to middle-sized proteins or peritoneal inflammation with proteins sloughing off. All the identified proteins may provide a novel understanding of peritoneal changes caused by uremic toxins and may function as biomarkers or drug targets.
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Affiliation(s)
- Hsien-Yi Wang
- Department of Nephrology, Chi-Mei Medical Center, Tainan 710, Taiwan
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Wang JC, Sonnylal S, Arnett FC, De Crombrugghe B, Zhou X. Attenuation of expression of extracellular matrix genes with siRNAs to Sparc and Ctgf in skin fibroblasts of CTGF transgenic mice. Int J Immunopathol Pharmacol 2011; 24:595-601. [PMID: 21978691 DOI: 10.1177/039463201102400305] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Transgenic mice that over-express connective tissue growth factor (CTGF) in fibroblasts under the control of an enhancer/promoter element of the Col1a2 gene (Col1a2-CTGF) recapitulate multiorgan fibrosis similar to fibrosis observed in Scleroderma (SSc). In this study we investigate the regulation of secreted protein acidic and rich in cysteine (Sparc) and Ctgf siRNAs on the expression of several extracellular matrix components in the fibroblasts derived from Col1a2-CTGF transgenic mice. Three fibroblast lines were obtained from each of wide type C57BL/6 and CTGF transgenic C57BL/6, and were transfected with Sparc siRNA or Ctgf siRNA. Real-time quantitative RT-PCR and Western blotting were used to examine the transcription and protein levels of type I collagen, CTGF and SPARC. Student's t-tests were used to determine the significance of the results. Our results showed that Col1a2 and Ctgf increased expression at both transcriptional and translational levels in the fibroblasts from the Col1a2-CTGF transgenic mice compared with those in the fibroblasts from their normal wild-type littermate. The treatment with Sparc siRNA or Ctgf siRNA attenuated the mRNA and/or protein expression of the Col1a2, Ctgf and Sparc in these fibroblasts. Sparc and Ctgf siRNAs also showed a reciprocal inhibition at transcript levels. Therefore, our results indicated that both SPARC and CTGF appeared to be involved in the same biological pathway, and they have the potential to serve as a therapeutic target for fibrotic diseases such as SSc.
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Affiliation(s)
- J C Wang
- MOE Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
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