1
|
Matsumoto K, Nakai Y, Hoshino M, Yamazaki K, Takioto Y, Takadera S, Nakagawa T, Nishimura R, Kusakabe M. Comprehensive DNA microarray expression profiles of tumors in tenascin-C-knockout mice. Biosci Biotechnol Biochem 2017; 81:1926-1936. [PMID: 28874093 DOI: 10.1080/09168451.2017.1362975] [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: 12/30/2022]
Abstract
Tenascin-C (TNC), an extracellular matrix glycoprotein, plays a pivotal role in tumor growth. However, the mechanism whereby TNC affects tumor biology remains unclear. To investigate the exact role of TNC in primary tumor growth, a mouse mammary tumor cell line, GLMT1, was first developed. Subsequently, global gene expression in GLMT1-derived tumors was compared between wild-type (WT) and TNC-knockout (TNKO) mice. Tumors in WT mice were significantly larger than those in TNKO mice. DNA microarray analysis revealed 447 up and 667 downregulated in the tumors inoculated into TNKO mice as compared to tumors in WT mice. Validation by quantitative gene expression analysis showed that Tnc, Cxcl1, Cxcl2, and Cxcr2 were significantly upregulated in WT mice. We hypothesize that TNC stimulates the CXCL1/2-CXCR2 pathway involved in cancer cell proliferation.
Collapse
Affiliation(s)
- Kaori Matsumoto
- a Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Yuji Nakai
- b Institute for Food Sciences , Hirosaki University , Aomori , Japan
| | - Masaru Hoshino
- c Advanced Technology Research Laboratory, Research Center for Food Safety, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Koki Yamazaki
- c Advanced Technology Research Laboratory, Research Center for Food Safety, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Yoshiaki Takioto
- c Advanced Technology Research Laboratory, Research Center for Food Safety, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Satoru Takadera
- c Advanced Technology Research Laboratory, Research Center for Food Safety, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Takayuki Nakagawa
- a Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Ryohei Nishimura
- a Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| | - Moriaki Kusakabe
- c Advanced Technology Research Laboratory, Research Center for Food Safety, Graduate School of Agricultural and Life Sciences , The University of Tokyo , Tokyo , Japan
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Matsumoto K, Banno Y, Murate T, Akao Y, Nozawa Y. Localization of Sphingosine Kinase-1 in Mouse Sperm Acrosomes. J Histochem Cytochem 2016; 53:243-7. [PMID: 15684337 DOI: 10.1369/jhc.4b6507.2005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Sphingosine kinase (SPHK) catalyzes sphingosine phosphorylation to form a bioactive lipid mediator, sphingosine-1-phosphate (S1P). In the current study, we report the presence of SPHK-1 in mouse spermatozoa. SPHK-1 was localized to the acrosomes of spermatozoa, and its expression was proven by RT-PCR and Western blot analysis. SPHK activity of mouse spermatozoa was 18.1 pmol/min/mg protein. Furthermore, we identified the presence of the S1P receptors S1P1, S1P2, S1P3, and S1P5, in mouse spermatozoa by RT-PCR. These results suggest that S1P produced by SPHK-1 would play a role in the acrosomal reaction through S1P receptors.
Collapse
|
4
|
Wu L, Chen X, Mei Y, Hong Q, Feng Z, Lv Y, Wen J, Liu X, Cai G, Chen X. CXCL10 expression induced by Mxi1 inactivation induces mesangial cell apoptosis in mouse Habu nephritis. Cell Signal 2015; 27:943-50. [PMID: 25683914 DOI: 10.1016/j.cellsig.2015.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 01/13/2015] [Accepted: 01/27/2015] [Indexed: 11/18/2022]
Abstract
MAX interactor 1 (Mxi1) proteins are c-myc antagonists that primarily exert their biological functions by inhibiting Myc-dependent gene transcription. In this study, Mxi1(-/-) mice were used to generate a model of mesangial proliferative glomerulonephritis for the first time. In the present study, we demonstrated that Mxi1(-/-) mice exhibited a more typical and severe pathological phenotype, which was displayed primarily as a noticeable dissolution phenotype with a higher proportion of apoptotic cells and higher chemokine CXCL10 expression during the early days of modeling, compared with wild-type mice. Additionally, we determined that IRF3-mediated TLR4 signaling was likely involved in regulating CXCL10 expression, which might participate in the mesangial dissolution process. We also found increases in CXCL10 expression, caspase 3 activation, and the proportion of apoptotic cells when Mxi1 expression was inhibited in mouse mesangial cells. Furthermore, the proportion of apoptotic cells decreased after inhibiting CXCL10 expression. Therefore, we concluded that the mesangial cell apoptosis observed in this mesangial proliferative glomerulonephritis model was related to CXCL10 expression induced by Mxi1 inactivation. This finding provides a new theoretical basis for the mechanism of mesangial proliferative glomerulonephritis progression and reveals potential intervention targets for the early treatment of this disease.
Collapse
Affiliation(s)
- Lingling Wu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China; Medical College, NanKai University, Tianjin, China
| | - Xiaoniao Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China; Medical College, NanKai University, Tianjin, China
| | - Yan Mei
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Quan Hong
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Zhe Feng
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Yang Lv
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Jun Wen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Xiaoluan Liu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China
| | - Guangyan Cai
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China.
| | - Xiangmei Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, China.
| |
Collapse
|
5
|
MATSUMOTO K, TAKEKAWA K. Comparison of the Effects of Three Persimmon Cultivars on Lipid and Glucose Metabolism in High-Fat Diet-Fed Mice. J Nutr Sci Vitaminol (Tokyo) 2014; 60:340-7. [DOI: 10.3177/jnsv.60.340] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Wx/ae double-mutant brown rice prevents the rise in plasma lipid and glucose levels in mice. Biosci Biotechnol Biochem 2012; 76:2112-7. [PMID: 23132586 DOI: 10.1271/bbb.120501] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A wx/ae double-mutant rice is generated by crossing waxy mutant and amylose-extender mutant in rice. Wx/ae brown rice contains highly beneficial nutrients for lipid and glucose metabolism, including resistant starch, dietary fiber, and γ-oryzanol, when compared to Koshihikari brown rice, the non-waxy japonica cultivar. To examine the effects of wx/ae brown rice on glucose and lipid metabolism, type 2 diabetic NSY/Hos mice were fed a high-fat diet containing 25% of wx/ae brown rice or Koshihikari brown rice for 10 weeks. The plasma total cholesterol, non-high-density lipoprotein cholesterol, triglyceride, and non-esterified fatty acid levels of the wx/ae group were significantly lower than those of the Koshihikari group. Moreover, the fasting blood glucose level and pathological score of glycosuria of the wx/ae group were also significantly lower than those of the Koshihikari group. These results indicate that wx/ae brown rice has the potential to prevent the rise in plasma lipid and glucose levels.
Collapse
|
7
|
Nakagawa T, Inoue H, Sasahara M. Platelet-derived growth factor and renal disease. Curr Opin Nephrol Hypertens 2012; 21:80-5. [PMID: 22123208 DOI: 10.1097/mnh.0b013e32834db4d3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW This review focuses on the recent advances in our understanding of the role of platelet-derived growth factor (PDGF) in glomerular disease. RECENT FINDINGS Accumulating evidence indicates a critical involvement of PDGF receptor-β (PDGFR-β) signaling in glomerular disease. Augmented signaling via PDGFR-β is involved in the pathogenesis of IgA nephropathy. Therefore, targeting PDGFR-β signaling is a viable therapeutic strategy for glomerular diseases. However, current PDGFR-β antagonists are nonspecific, and their long-term effects remain to be elucidated. To develop effective intervention therapies targeting PDGF signaling, it is necessary to clarify the specific involvement of PDGF in the pathogenesis of glomerular disease. A novel PDGFR-β targeting mouse model has provided new insight into the postnatal role of PDGFR-β in aging-related mesangial sclerosis and the glomerular remodeling after nephrectomy. Furthermore, the same study indicated the redundancy of growth factor signals underlying glomerular remodeling. In this context, other studies have suggested a role for PDGFR-α signaling and collaborating growth factors to compensate for PDGFR-β in the kidney glomerulus. SUMMARY Intervention in growth factor signaling could be a valuable therapeutic strategy for kidney glomerular diseases. Further studies are required to characterize the pathogenesis of these diseases for the successful development of such a therapy.
Collapse
Affiliation(s)
- Taizo Nakagawa
- The Second Department of Internal Medicine, University of Toyama, Toyama, Japan.
| | | | | |
Collapse
|
8
|
Matsumoto K, Yokoyama SI. Induction of uncoupling protein-1 and -3 in brown adipose tissue by kaki-tannin in type 2 diabetic NSY/Hos mice. Food Chem Toxicol 2012; 50:184-90. [DOI: 10.1016/j.fct.2011.10.067] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 09/05/2011] [Accepted: 10/25/2011] [Indexed: 01/06/2023]
|
9
|
Suzuki H, Usui I, Kato I, Oya T, Kanatani Y, Yamazaki Y, Fujisaka S, Senda S, Ishii Y, Urakaze M, Mahmood A, Takasawa S, Okamoto H, Kobayashi M, Tobe K, Sasahara M. Deletion of platelet-derived growth factor receptor-β improves diabetic nephropathy in Ca²⁺/calmodulin-dependent protein kinase IIα (Thr286Asp) transgenic mice. Diabetologia 2011; 54:2953-62. [PMID: 21833587 DOI: 10.1007/s00125-011-2270-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 07/05/2011] [Indexed: 01/28/2023]
Abstract
AIMS/HYPOTHESIS The activation of platelet-derived growth factor receptor-β (PDGFR-β) signalling is increased in the glomeruli and tubules of diabetic animals. In this study, we examined the role of PDGFR-β signalling during the development of diabetic nephropathy. METHODS We recently generated pancreatic beta cell-specific Ca(2+)/calmodulin-dependent protein kinase IIα (Thr286Asp) transgenic mice (CaMKIIα mice), which show very high plasma glucose levels up to 55.5 mmol/l and exhibit the features of diabetic nephropathy. These mice were crossed with conditional knockout mice in which Pdgfr-β (also known as Pdgfrb) was deleted postnatally. The effect of the deletion of the Pdgfr-β gene on diabetic nephropathy in CaMKIIα mice was evaluated at 10 and 16 weeks of age. RESULTS The plasma glucose concentrations and HbA(1c) levels were elevated in the CaMKIIα mice from 4 weeks of age. Variables indicative of diabetic nephropathy, such as an increased urinary albumin/creatinine ratio, kidney weight/body weight ratio and mesangial area/glomerular area ratio, were observed at 16 weeks of age. The postnatal deletion of the Pdgfr-β gene significantly decreased the urinary albumin/creatinine ratio and mesangial area/glomerular area ratio without affecting the plasma glucose concentration. Furthermore, the increased oxidative stress in the kidneys of the CaMKIIα mice as shown by the increased urinary 8-hydroxydeoxyguanosine (8-OHdG) excretion and the increased expression of NAD(P)H oxidase 4 (NOX4), glutathione peroxidase 1 (GPX1) and manganese superoxide dismutase (MnSOD) was decreased by Pdgfr-β gene deletion. CONCLUSIONS/INTERPRETATION The activation of PDGFR-β signalling contributes to the progress of diabetic nephropathy, with an increase in oxidative stress and mesangial expansion in CaMKIIα mice.
Collapse
Affiliation(s)
- H Suzuki
- First Department of Internal Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
van Roeyen CRC, Ostendorf T, Floege J. The platelet-derived growth factor system in renal disease: an emerging role of endogenous inhibitors. Eur J Cell Biol 2011; 91:542-51. [PMID: 21872965 DOI: 10.1016/j.ejcb.2011.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 07/05/2011] [Accepted: 07/05/2011] [Indexed: 01/28/2023] Open
Abstract
The platelet-derived growth factor (PDGF) family consists of four isoforms which are secreted as homodimers (PDGF-AA, PDGF-BB, PDGF-CC and PDGF-DD) or heterodimers (PDGF-AB), and two receptor chains (PDGFR-α and -β). All members of the PDGF system are constitutively or inducibly expressed in renal cells and are involved in the regulation of cell proliferation and migration, the accumulation of extracellular matrix proteins and the secretion of pro- and anti-inflammatory mediators. Particular roles have been identified in mediating mesangioproliferative changes, renal interstitial fibrosis and glomerular angiogenesis. Different endogenous inhibitors of PDGF-induced biological responses exist which affect the activation/deactivation of PDGF isoforms, the activity of the PDGFRs, or which block downstream signaling pathways of the autophosphorylated PDGFRs. The novel endogenous inhibitor nephroblastoma overexpressed gene (NOV, CCN3) reduces PDGF-induced cell proliferation and is downregulated by PDGF isoforms itself. Among all identified inhibitors only few "true" PDGF antagonists have been identified. A better understanding of these inhibitors may aid in the design of novel therapeutic approaches to PDGF-mediated diseases.
Collapse
Affiliation(s)
- Claudia R C van Roeyen
- Department of Nephrology and Clinical Immunology, RWTH University Hospital Aachen, Pauwelsstr. 30, D-52057 Aachen, Germany.
| | | | | |
Collapse
|
11
|
Nakagawa T, Izumino K, Ishii Y, Oya T, Hamashima T, Jie S, Ishizawa S, Tomoda F, Fujimori T, Nabeshima YI, Inoue H, Sasahara M. Roles of PDGF receptor-beta in the structure and function of postnatal kidney glomerulus. Nephrol Dial Transplant 2010; 26:458-68. [DOI: 10.1093/ndt/gfq468] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
|
12
|
Matsumoto K, Yokoyama SI. Gene expression analysis on the liver of cholestyramine-treated type 2 diabetic model mice. Biomed Pharmacother 2010; 64:373-8. [PMID: 20347570 DOI: 10.1016/j.biopha.2010.02.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 02/21/2010] [Indexed: 01/06/2023] Open
Abstract
Recent experimental and clinical studies have indicated that bile acid-binding agents are effective not only for treating hypercholesterolemia, but also for type 2 diabetes. To investigate the molecular mechanism underlying the effect of cholestyramine, a bile acid-binding agent, on type 2 diabetes, we examined gene expression of the livers of cholestyramine-treated type 2 diabetic model mice. Type 2 diabetic NSY/Hos mice were fed a high fat diet supplemented with 1% (w/w) cholestyramine for 8 weeks. Cholestyramine treatment prevented the increase in body weight, plasma cholesterol, triglycerides, glucose, insulin levels, and hepatic steatosis. DNA microarray analysis was performed on the liver, which revealed that the genes related to synthesis of cholesterol and its derivatives were increased and the genes regulated by liver X receptors, such as the sterol regulatory element-binding protein 1 gene, were decreased in the group treated with cholestyramine. Expression of the genes related to carbohydrate metabolism was little changed in the cholestyramine group. Furthermore, we performed real-time RT-PCR analysis, which highly correlated with DNA microarray data (r=0.957, P<0.001). This study provides a valuable basis for further research on the biological functions of bile acid-binding agents in models of type 2 diabetes.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Department of Applied Microbiology, Gifu Prefectural Research Institute for Bioengineering, 3481-2 Kamihachiya, Hachiya, Minokamo, Gifu 505-0004, Japan.
| | | |
Collapse
|
13
|
Matsumoto K, Yokoyama SI, Gato N. Bile acid-binding activity of young persimmon (Diospyros kaki) fruit and its hypolipidemic effect in mice. Phytother Res 2010; 24:205-10. [PMID: 19585467 DOI: 10.1002/ptr.2911] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The hypolipidemic effects and bile acid-binding properties of young persimmon (Diospyros kaki) fruit were examined. In an animal experiment, male C57BL/6.Cr mice (n = 5) were fed an AIN-76-modified high fat diet supplemented with 2% or 5% (w/w) dried young persimmon fruit (YP) for 10 weeks. The intake of YP significantly enhanced fecal bile acid excretion and lowered the concentration of hepatic lipids and plasma cholesterol. Analysis of gene expression in liver tissue showed that 2% or 5% YP up-regulated the expression of the sterol regulatory element-binding protein-2 gene. In the 5% group, there were increased expressions of the genes for cholesterol 7alpha-hydroxylase and the low-density lipoprotein receptor. Next, the bile acid-binding ability of YP was analysed in vitro using cholic acid (CA). In 100-2000 microM CA solutions, 1% (w/v) YP adsorbed approximately 60% of CA, while dried mature persimmon fruit adsorbed approximately 20% of CA. The positive control, cholestyramine, adsorbed approximately 80% of CA in the 100-2000 microM CA solutions. A crude tannin extract from YP, which contained 54.7% condensed tannins, adsorbed approximately 78% of CA in the 2000 microM CA solutions. These results suggest that the ability of YP to bind bile acid contributes to its hypolipidemic effect in mice.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Department of Applied Microbiology, Gifu Prefectural Research Institute for Bioengineering, Minokamo, Gifu, Japan.
| | | | | |
Collapse
|
14
|
Leipner C, Grün K, Müller A, Buchdunger E, Borsi L, Kosmehl H, Berndt A, Janik T, Uecker A, Kiehntopf M, Böhmer FD. Imatinib mesylate attenuates fibrosis in coxsackievirus b3-induced chronic myocarditis. Cardiovasc Res 2008; 79:118-26. [DOI: 10.1093/cvr/cvn063] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
15
|
Floege J, Eitner F, Alpers CE. A New Look at Platelet-Derived Growth Factor in Renal Disease. J Am Soc Nephrol 2007; 19:12-23. [DOI: 10.1681/asn.2007050532] [Citation(s) in RCA: 235] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
16
|
Matsumoto K, Watanabe Y, Yokoyama SI. Okara, soybean residue, prevents obesity in a diet-induced murine obesity model. Biosci Biotechnol Biochem 2007; 71:720-7. [PMID: 17341837 DOI: 10.1271/bbb.60563] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We examined the effect of okara on the prevention of obesity in mice. A modified AIN-76 diet with a high fat content (14.1% of crude fat) was used as a basal diet. Male ICR mice were fed ad libitum with the basal diet or a dried okara-supplemented basal diet (10, 20, or 40%) for 10 weeks. The okara intake dose-dependently suppressed the development of body weight and epididymal white adipose tissue (EWAT), and prevented an increase of plasma lipids, including total cholesterol, LDL cholesterol, and non-esterified fatty acid. The okara intake also prevented steatosis in the liver. Real-time RT-PCR revealed that the okara intake induced down-regulation of the fatty acid synthetase gene and up-regulation of the cholesterol 7 alpha-hydroxylase (CYP7A1) gene in the liver. We also found that the okara intake caused a marked reduction in the expression of leptin and TNF-alpha genes in EWAT. Our results suggest that okara is beneficial in preventing obesity.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Gifu Prefectural Research Institute for Bioengineering, Department of Applied Microbiology, Minokamo, Gifu, Japan.
| | | | | |
Collapse
|
17
|
Matsumoto K, Watanabe Y, Ohya MA, Yokoyama SI. Young persimmon fruits prevent the rise in plasma lipids in a diet-induced murine obesity model. Biol Pharm Bull 2007; 29:2532-5. [PMID: 17142997 DOI: 10.1248/bpb.29.2532] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of young and mature persimmon fruits on lipid metabolism was investigated in a diet-induced murine obesity model. A commercially purchased high fat diet (Quick Fat, CLEA Japan) was used as the basal diet. Dried and powdered young and mature fruits of two breeds of persimmon, Fuyu-kaki and Hachiya-kaki, were added to the basal diet at a concentration of 10%, respectively. Male C57BL/6 mice (n=4) were divided into five groups and fed the basal diet or one of the persimmon-supplemented basal diets ad libitum for 14 weeks. Diets supplemented with both types of young fruit significantly reduced the rise in plasma lipids, including total cholesterol (p<0.005), triglyceride (p<0.05), and LDL cholesterol (p<0.05), and the effect was almost equal between the two breeds. Real-time RT-PCR revealed that both of these young fruit-supplemented diets equally up-regulated expression of the cholesterol 7 alpha-hydroxylase (CYP7A1) gene in the liver by about three-fold (p<0.05). CYP7A1 plays an important role in maintaining cholesterol homeostasis by regulating bile acid synthesis, suggesting that increased conversion of cholesterol to bile acids may have caused the cholesterol-lowering effect of the young fruits. The results indicate that young persimmon fruits are beneficial in the development of preventive and therapeutic agents against dyslipidemia.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Department of Applied Microbiology, Gifu Prefectural Research Institute for Bioengineering, Japan.
| | | | | | | |
Collapse
|
18
|
Tamaoki M, Imanaka-Yoshida K, Yokoyama K, Nishioka T, Inada H, Hiroe M, Sakakura T, Yoshida T. Tenascin-C regulates recruitment of myofibroblasts during tissue repair after myocardial injury. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 167:71-80. [PMID: 15972953 PMCID: PMC1603439 DOI: 10.1016/s0002-9440(10)62954-9] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/15/2005] [Indexed: 12/13/2022]
Abstract
Tenascin-C (TN-C) is an extracellular matrix molecule that is expressed during wound healing in various tissues. Although not detectable in the normal adult heart, it is expressed under pathological conditions. Previously, using a rat model, we found that TN-C was expressed during the acute stage after myocardial infarction and that alpha-smooth muscle actin (alpha-SMA)-positive myofibroblasts appeared in TN-C-positive areas. In the present study, we examined whether TN-C controls the dynamics of myofibroblast recruitment and wound healing after electrical injury to the myocardium of TN-C knockout (TNKO) mice compared with wild-type (WT) mice. In TNKO mice, myocardial repair seemed to proceed normally, but the appearance of myofibroblasts was delayed. With cultured cardiac fibroblasts, TN-C significantly accelerated cell migration, alpha-SMA expression, and collagen gel contraction but did not affect proliferation. Using recombinant fragments of murine TN-C, the functional domain responsible for promoting migration of cardiac fibroblasts was mapped to the conserved fibronectin type III (FNIII)-like repeats and the fibrinogen (Fbg)-like domain. Furthermore, alternatively spliced FNIII and Fbg-like domains proved responsible for the up-regulation of alpha-SMA expression. These results indicate that TN-C promotes recruitment of myofibroblasts in the early stages of myocardial repair by stimulating cell migration and differentiation.
Collapse
Affiliation(s)
- Masashi Tamaoki
- Department of Pathology and Biology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Matsumoto K, Akao Y, Yi H, Shamoto-Nagai M, Maruyama W, Naoi M. Overexpression of amyloid precursor protein induces susceptibility to oxidative stress in human neuroblastoma SH-SY5Y cells. J Neural Transm (Vienna) 2005; 113:125-35. [PMID: 15959846 DOI: 10.1007/s00702-005-0318-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2004] [Accepted: 04/09/2005] [Indexed: 12/11/2022]
Abstract
In Alzheimer's disease amyloid beta peptide (Abeta) produced from amyloid precursor protein (APP) is considered to induce cell death. To clarify the molecular mechanism underlying Abeta neurotoxicity, we established the cell line overexpressing wild or mutant (His684Arg) APP in human SH-SY5Y cells. This paper presents that overexpression of wild-APP in the cells (SH/w-APP) increased the levels of APP and Abeta(1-40) but not Abeta(1-42), and reduced Bcl-2 level and proteasome activity with increased susceptibility to oxidative stress. The intracellular levels of reactive oxygen species in SH/w-APP increased significantly by H(2)O(2) treatment. The level of Bcl-2 protein, but not mRNA, was markedly decreased in SH/w-APP cells, which was inversely correlated with APP expression among subcloned SH/w-APP cells. These results indicate that increased expression of wild type APP renders neuronal cells more vulnerable to oxidative stress leading to cell death.
Collapse
Affiliation(s)
- K Matsumoto
- Gifu International Institute of Biotechnology, Kakamigahara, Gifu, Japan
| | | | | | | | | | | |
Collapse
|
20
|
Garwood J, Garcion E, Dobbertin A, Heck N, Calco V, ffrench-Constant C, Faissner A. The extracellular matrix glycoprotein Tenascin-C is expressed by oligodendrocyte precursor cells and required for the regulation of maturation rate, survival and responsiveness to platelet-derived growth factor. Eur J Neurosci 2005; 20:2524-40. [PMID: 15548197 DOI: 10.1111/j.1460-9568.2004.03727.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Analysis of Tenascin-C (TN-C) knockout mice revealed novel roles for this extracellular matrix (ECM) protein in regulation of the developmental programme of oligodendrocyte precursor cells (OPCs), their maturation into myelinating oligodendrocytes and sensitivity to growth factors. A major component of the ECM of developing nervous tissue, TN-C was expressed in zones of proliferation, migration and morphogenesis. Examination of TN-C knockout mice showed roles for TN-C in control of OPC proliferation and migration towards zones of myelination [E. Garcion et al. (2001) Development, 128, 2485-2496]. Extending our studies of TN-C effects on OPC development we found that OPCs can endogenously express TN-C protein. This expression covered the whole range of possible TN-C isoforms and could be strongly up-regulated by leukaemia inhibitory factor and ciliary neurotrophic factor, cytokines known to modulate OPC proliferation and survival. Comparative analysis of TN-C knockout OPCs with wild-type OPCs reveals an accelerated rate of maturation in the absence of TN-C, with earlier morphological differentiation and precocious expression of myelin basic protein. TN-C knockout OPCs plated on poly-lysine displayed higher levels of apoptosis than wild-type OPCs and there was also an earlier loss of responsiveness to the protective effects of platelet-derived growth factor (PDGF), indicating that TN-C has anti-apoptotic effects that may be associated with PDGF signalling. The existence of mechanisms to compensate for the absence of TN-C in the knockout is indicated by the development of oligodendrocytes derived from TN-C knockout neurospheres. These were present in equivalent proportions to those found in wild-type neurospheres but displayed enhanced myelin membrane formation.
Collapse
MESH Headings
- Animals
- Animals, Newborn
- Antigens/metabolism
- Blotting, Western/methods
- Brain/cytology
- Brain/embryology
- Brain/growth & development
- Brain/metabolism
- Bromodeoxyuridine/metabolism
- Cell Count/methods
- Cell Differentiation/drug effects
- Cell Survival/drug effects
- Cells, Cultured
- Cerebral Cortex/cytology
- Chondroitin Sulfates/metabolism
- Cytokines/pharmacology
- Embryo, Mammalian
- Gene Expression Regulation, Developmental/drug effects
- Humans
- Immunohistochemistry/methods
- In Situ Hybridization/methods
- In Situ Nick-End Labeling/methods
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Models, Biological
- Myelin Basic Protein/metabolism
- Nerve Tissue Proteins/metabolism
- Oligodendroglia/drug effects
- Oligodendroglia/metabolism
- Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase/pharmacology
- Platelet-Derived Growth Factor/pharmacology
- Protein Tyrosine Phosphatases/metabolism
- Proteoglycans/metabolism
- RNA, Messenger/biosynthesis
- Rats
- Rats, Sprague-Dawley
- Receptor, Platelet-Derived Growth Factor alpha/genetics
- Receptor, Platelet-Derived Growth Factor alpha/metabolism
- Receptor-Like Protein Tyrosine Phosphatases, Class 5
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Stem Cells/drug effects
- Stem Cells/metabolism
- Tenascin/genetics
- Tenascin/physiology
- Time Factors
Collapse
Affiliation(s)
- Jeremy Garwood
- LNDR, CNRS 5, rue Blaise Pascal, 67084 Strasbourg Cedex, France.
| | | | | | | | | | | | | |
Collapse
|
21
|
Campbell JS, Hughes SD, Gilbertson DG, Palmer TE, Holdren MS, Haran AC, Odell MM, Bauer RL, Ren HP, Haugen HS, Yeh MM, Fausto N. Platelet-derived growth factor C induces liver fibrosis, steatosis, and hepatocellular carcinoma. Proc Natl Acad Sci U S A 2005; 102:3389-94. [PMID: 15728360 PMCID: PMC552940 DOI: 10.1073/pnas.0409722102] [Citation(s) in RCA: 265] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Members of the platelet-derived growth factor (PDGF) ligand family are known to play important roles in wound healing and fibrotic disease. We show that both transient and stable expression of PDGF-C results in the development of liver fibrosis consisting of the deposition of collagen in a pericellular and perivenular pattern that resembles human alcoholic and nonalcoholic fatty liver disease. Fibrosis in PDGF-C transgenic mice, as demonstrated by staining and hydroxyproline content, is preceded by activation and proliferation of hepatic stellate cells, as shown by collagen, alpha-smooth muscle actin and glial fibrillary acidic protein staining and between 8 and 12 months of age is followed by the development of liver adenomas and hepatocellular carcinomas. The hepatic expression of a number of known profibrotic genes, including type beta1 TGF, PDGF receptors alpha and beta, and tissue inhibitors of matrix metalloproteinases-1 and -2, increased by 4 weeks of age. Increased PDGF receptor alpha and beta protein levels were associated with activation of extracellular regulated kinase-1 and -2 and protein kinase B. At 9 months of age, PDGF-C transgenic mice had enlarged livers associated with increased fibrosis, steatosis, cell dysplasia, and hepatocellular carcinomas. These studies indicate that hepatic expression of PDGF-C induces a number of profibrotic pathways, suggesting that this growth factor may act as an initiator of fibrosis. Moreover, PDGF-C transgenic mice represent a unique model for the study of hepatic fibrosis progressing to tumorigenesis.
Collapse
Affiliation(s)
- Jean S Campbell
- Department of Pathology, University of Washington, Seattle, WA 98115, USA.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Cai J, Xue H, Zhan M, Rao MS. Characterization of Progenitor-Cell-Specific Genes Identified by Subtractive Suppression Hybridization. Dev Neurosci 2005; 26:131-47. [PMID: 15711056 DOI: 10.1159/000082133] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2003] [Accepted: 02/23/2004] [Indexed: 11/19/2022] Open
Abstract
We have utilized subtractive suppression hybridization (SSH) to identify differentially expressed genes present in either neuroepithelial (NEP) cells or glial restricted precursor (GRP) cells. Eighteen clones enriched in GRP cells and 28 in NEP cells were identified. Five of the GRP-specific clones (tenascin C, cystatin C, GABA transporter 3, extracellular matrix molecule 2 and H2-4) were characterized further, and their glial specificity was confirmed by RT-PCR, in situ hybridization and immunocytochemistry. H2-4 (an expressed sequence tag) was shown to be part of chondroitin sulfate proteoglycan 3. Overall, our results show that SSH can be used to identify lineage- and stage-specific markers and that extracellular matrix molecules likely play important roles in the migration and differentiation of GRPs.
Collapse
Affiliation(s)
- Jingli Cai
- Laboratoryof Neurosciences, National Institute on Aging, Baltimore, MD 21224, USA
| | | | | | | |
Collapse
|
23
|
Bjarnegård M, Enge M, Norlin J, Gustafsdottir S, Fredriksson S, Abramsson A, Takemoto M, Gustafsson E, Fässler R, Betsholtz C. Endothelium-specific ablation of PDGFB leads to pericyte loss and glomerular, cardiac and placental abnormalities. Development 2004; 131:1847-57. [PMID: 15084468 DOI: 10.1242/dev.01080] [Citation(s) in RCA: 258] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Platelet-derived growth factor-B (PDGFB) is necessary for normal cardiovascular development, but the relative importance of different cellular sources of PDGFB has not been established. Using Cre-lox techniques, we show here that genetic ablation of Pdgfb in endothelial cells leads to impaired recruitment of pericytes to blood vessels. The endothelium-restricted Pdgfb knockout mutants also developed organ defects including cardiac, placental and renal abnormalities. These defects were similar to those observed in Pdgfb null mice. However, in marked contrast to the embryonic lethality of Pdgfb null mutants, the endothelium-specific mutants survived into adulthood with persistent pathological changes, including brain microhemorrhages, focal astrogliosis, and kidney glomerulus abnormalities. This spectrum of pathological changes is reminiscent of diabetic microangiopathy, suggesting that the endothelium-restricted Pdgfb knockouts may serve as models for some of the pathogenic events of vascular complications to diabetes.
Collapse
Affiliation(s)
- Mattias Bjarnegård
- Department of Medical Biochemistry, Göteborg University, PO Box 440, SE 405 30 Göteborg, Sweden
| | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Roth-Kleiner M, Hirsch E, Schittny JC. Fetal lungs of tenascin-C-deficient mice grow well, but branch poorly in organ culture. Am J Respir Cell Mol Biol 2004; 30:360-6. [PMID: 12904321 DOI: 10.1165/rcmb.2002-0266oc] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Tenascin-C (TNC) is a multidomain extracellular matrix protein that contributes to organogenesis and tumorgenesis. To elucidate its developmental function in the context of TNC deficiency, lung lobes of TNC null mice were obtained at Embryonic Days E11.5 and E12.5 and cultured for 3 d. In lung explants of homozygote TNC-deficient embryos (E12.5) the number of future airway branches was reduced by 36% as compared with wild-type. In heterozygote explants only half of the reduction (18%) was observed. No significant alteration, neither of the explant growth nor of the pattern of airway branching, was noticed in TNC-null explants. However, the terminal endbuds of the transgenic explants were enlarged. The results are supported by a morphologic investigation at Postnatal Day P2, where the airspaces of TNC-deficient lungs appeared larger than in wild-type lungs. Taken together, our results represent the first developmental phenotype of TNC-null mice. We conclude that TNC takes part in the control of fetal lung branching, and that not only the presence of TNC but also its amount is important. Because TNC is predominantly expressed at the growing tip of the future airways, we hypothesize that TNC promotes the penetration into the surrounding mesenchyme and the branching of the growing airways.
Collapse
Affiliation(s)
- Matthias Roth-Kleiner
- Institute of Anatomy, University of Bern, Buehlstrasse 26, CH-3000 Bern 9, Switzerland
| | | | | |
Collapse
|
25
|
Taneda S, Hudkins KL, Topouzis S, Gilbertson DG, Ophascharoensuk V, Truong L, Johnson RJ, Alpers CE. Obstructive Uropathy in Mice and Humans: Potential Role for PDGF-D in the Progression of Tubulointerstitial Injury. J Am Soc Nephrol 2003; 14:2544-55. [PMID: 14514732 DOI: 10.1097/01.asn.0000089828.73014.c8] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
ABSTRACT. Tubulointerstitial fibrosis is a major characteristic of progressive renal diseases. Platelet-derived growth factor (PDGF) is a family of growth regulatory molecules consisting of PDGF-A and -B, along with the newly discovered PDGF-C and -D. They signal through cell membrane receptors, PDGF receptor α (PDGF-Rα) and receptor β (PDGF-Rβ). Involvement of PDGF-B and PDGF-Rβ in the initiation and progression of renal fibrosis has been well documented. The authors studied the localization of PDGF ligands and receptors by immunohistochemistry, with emphasis on the role of PDGF-D in murine renal fibrosis induced by unilateral ureteral obstruction (UUO). In mice with UUO,de novoexpression of PDGF-D was detected in interstitial cells at day 4, which increased to maximal expression at day 14. Increased expression of PDGF-B by interstitial cells and in some tubules was observed after day 4. The diseased mice did not show augmentation of PDGF-A or PDGF-C proteins in the areas of fibrosis. PDGF-Rα and -Rβ protein expression was increased in interstitial cells after day 4 and reached maximal expression at day 14. Human renal nephrectomies (n= 10) of chronic obstructive nephropathy demonstrated similarde novoexpression of PDGF-D in interstitial cells, correlating with expression of PDGF-Rβ and PDGF-B, as it did in the murine model. These observations suggest that PDGF-D plays an important role in the pathogenesis of tubulointerstitial injury through binding of PDGF-Rβ in both human obstructive nephropathy and the corresponding murine model of UUO. E-mail: calp@u.washington.edu
Collapse
Affiliation(s)
- Sekiko Taneda
- Department of Pathology, University of Washington, Seattle, Washington, USA
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Matsumoto K, Hiraiwa N, Yoshiki A, Ohnishi M, Kusakabe M. Tenascin-C expression and splice variant in habu snake venom-induced glomerulonephritis. Exp Mol Pathol 2002; 72:186-95. [PMID: 12009782 DOI: 10.1006/exmp.2002.2432] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Extracellular matrix glycoprotein tenascin-C (TNC) expression is up-regulated in tissue remodeling processes such as tumorigenesis and wound healing. Mouse tenascin-C contains six alternatively spliced domains (A1, A2, A4, B, C, and D) between the fifth and the sixth type III fibronectin domains, which generate large numbers of TNC isoforms. To study TNC isoform variability of wound healing in mice, we induced glomerulonephritis by using Habu snake venom (HSV) and examined alternatively spliced regions by the reverse transcription polymerase chain reaction (RT-PCR) technique. RT-PCR products were separated into seven bands in both healthy and diseased kidneys. Among the seven bands, those containing one or five alternatively spliced domains were mainly up-regulated from 2 days to 1 week after HSV injection. Southern blotting revealed that only domain-D detected all six bands in both healthy and diseased kidneys. Furthermore, only the domain-C transcriptional level did not show an obvious change in progress following HSV injection. These results suggested that (a) the isoforms containing one or five alternatively spliced domains play important roles in the healing process of glomerulonephritis, (b) domain-D is particularly significant in kidney, and (c) domain-C may not play an important role in the healing process of HSV-induced glomerulonephritis.
Collapse
Affiliation(s)
- Kenji Matsumoto
- Experimental Animal Division, Bio Resource Center, RIKEN, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
| | | | | | | | | |
Collapse
|