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Inagaki J, Nakano A, Hatipoglu OF, Ooka Y, Tani Y, Miki A, Ikemura K, Opoku G, Ando R, Kodama S, Ohtsuki T, Yamaji H, Yamamoto S, Katsuyama E, Watanabe S, Hirohata S. Potential of a Novel Chemical Compound Targeting Matrix Metalloprotease-13 for Early Osteoarthritis: An In Vitro Study. Int J Mol Sci 2022; 23:ijms23052681. [PMID: 35269821 PMCID: PMC8910651 DOI: 10.3390/ijms23052681] [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: 01/28/2022] [Revised: 02/22/2022] [Accepted: 02/26/2022] [Indexed: 02/01/2023] Open
Abstract
Osteoarthritis is a progressive disease characterized by cartilage destruction in the joints. Matrix metalloproteinases (MMPs) and a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTSs) play key roles in osteoarthritis progression. In this study, we screened a chemical compound library to identify new drug candidates that target MMP and ADAMTS using a cytokine-stimulated OUMS-27 chondrosarcoma cells. By screening PCR-based mRNA expression, we selected 2-(8-methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)-N-(3-methoxyphenyl) acetamide as a potential candidate. We found that 2-(8-methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)-N-(3-methoxyphenyl) acetamide attenuated IL-1β-induced MMP13 mRNA expression in a dose-dependent manner, without causing serious cytotoxicity. Signaling pathway analysis revealed that 2-(8-methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)-N-(3-methoxyphenyl) acetamide attenuated ERK- and p-38-phosphorylation as well as JNK phosphorylation. We then examined the additive effect of 2-(8-methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)-N-(3-methoxyphenyl) acetamide in combination with low-dose betamethasone on IL-1β-stimulated cells. Combined treatment with 2-(8-methoxy-2-methyl-4-oxoquinolin-1(4H)-yl)-N-(3-methoxyphenyl) acetamide and betamethasone significantly attenuated MMP13 and ADAMTS9 mRNA expression. In conclusion, we identified a potential compound of interest that may help attenuate matrix-degrading enzymes in the early osteoarthritis-affected joints.
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Affiliation(s)
- Junko Inagaki
- Department of Cell Chemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan;
| | - Airi Nakano
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Omer Faruk Hatipoglu
- Department of Pharmacology, Faculty of Medicine, Kindai University, Higashi-Sayama, Osaka 577-8502, Japan;
| | - Yuka Ooka
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Yurina Tani
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Akane Miki
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Kentaro Ikemura
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Gabriel Opoku
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Ryosuke Ando
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Shintaro Kodama
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Takashi Ohtsuki
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Hirosuke Yamaji
- Heart Rhythm Center, Okayama Heart Clinic, Takeda 54-1, Okayama 703-8251, Japan;
| | - Shusei Yamamoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Eri Katsuyama
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Shogo Watanabe
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
| | - Satoshi Hirohata
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Okayama 700-8558, Japan; (A.N.); (Y.O.); (Y.T.); (A.M.); (K.I.); (G.O.); (R.A.); (S.K.); (T.O.); (S.Y.); (E.K.); (S.W.)
- Correspondence: ; Tel./Fax: +81-86-235-6897
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Xu F, Ashbrook DG, Gao J, Starlard-Davenport A, Zhao W, Miller DB, O'Callaghan JP, Williams RW, Jones BC, Lu L. Genome-wide transcriptome architecture in a mouse model of Gulf War Illness. Brain Behav Immun 2020; 89:209-223. [PMID: 32574576 PMCID: PMC7787136 DOI: 10.1016/j.bbi.2020.06.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/18/2020] [Accepted: 06/11/2020] [Indexed: 12/31/2022] Open
Abstract
Gulf War Illness (GWI) is thought to be a chronic neuroimmune disorder caused by in-theater exposure during the 1990-1991 Gulf War. There is a consensus that the illness is caused by exposure to insecticides and nerve agent toxicants. However, the heterogeneity in both development of disease and clinical outcomes strongly suggests a genetic contribution. Here, we modeled GWI in 30 BXD recombinant inbred mouse strains with a combined treatment of corticosterone (CORT) and diisopropyl fluorophosphate (DFP). We quantified transcriptomes from 409 prefrontal cortex samples. Compared to the untreated and DFP treated controls, the combined treatment significantly activated pathways such as cytokine-cytokine receptor interaction and TNF signaling pathway. Protein-protein interaction analysis defined 6 subnetworks for CORT + DFP, with the key regulators being Cxcl1, Il6, Ccnb1, Tnf, Agt, and Itgam. We also identified 21 differentially expressed genes having significant QTLs related to CORT + DFP, but without evidence for untreated and DFP treated controls, suggesting regions of the genome specifically involved in the response to CORT + DFP. We identified Adamts9 as a potential contributor to response to CORT + DFP and found links to symptoms of GWI. Furthermore, we observed a significant effect of CORT + DFP treatment on the relative proportion of myelinating oligodendrocytes, with a QTL on Chromosome 5. We highlight three candidates, Magi2, Sema3c, and Gnai1, based on their high expression in the brain and oligodendrocyte. In summary, our results show significant genetic effects of the CORT + DFP treatment, which mirrors gene and protein expression changes seen in GWI sufferers, providing insight into the disease and a testbed for future interventions.
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Affiliation(s)
- Fuyi Xu
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - David G Ashbrook
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Jun Gao
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China
| | - Athena Starlard-Davenport
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Wenyuan Zhao
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Diane B Miller
- Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - James P O'Callaghan
- Molecular Neurotoxicology Laboratory, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Robert W Williams
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Byron C Jones
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
| | - Lu Lu
- Department of Genetics, Genomics, and Informatics, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
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Induction of CEMIP in Chondrocytes by Inflammatory Cytokines: Underlying Mechanisms and Potential Involvement in Osteoarthritis. Int J Mol Sci 2020; 21:ijms21093140. [PMID: 32365591 PMCID: PMC7247684 DOI: 10.3390/ijms21093140] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 12/23/2022] Open
Abstract
In patients with osteoarthritis (OA), there is a decrease in both the concentration and molecular size of hyaluronan (HA) in the synovial fluid and cartilage. Cell migration-inducing hyaluronidase 1 (CEMIP), also known as hyaluronan (HA)-binding protein involved in HA depolymerization (HYBID), was recently reported as an HA depolymerization-related molecule expressed in the cartilage of patients with OA. However, the underlying mechanism of CEMIP regulation is not well understood. We found that CEMIP expression was transiently increased by interleukine-1β (IL-1β) stimulation in chondrocytic cells. We also observed that ERK activation and NF-κB nuclear translocation were involved in the induction of CEMIP by IL-1β. In addition, both administration of HA and mechanical strain attenuated the CEMIP induction in IL-1β-stimulated chondrocytes. In conclusion, we clarified the regulatory mechanism of CEMIP in chondrocytes by inflammatory cytokines and suggested the potential involvement in osteoarthritis development.
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Akyol S, Karagoz Z, Dingil Inan N, Butun I, Benli I, Demircan K, Yigitoglu MR, Akyol O, Sahin S, Ozyurt H. The gene expression and protein profiles of ADAMTS and TIMP in human chondrosarcoma cell lines induced by insulin: The potential mechanisms for skeletal and articular abnormalities in diabetes. ELECTRONIC JOURNAL OF GENERAL MEDICINE 2020. [DOI: 10.29333/ejgm/112767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Differentially regulated ADAMTS1, 8, 9, and 18 in pancreas adenocarcinoma. GASTROENTEROLOGY REVIEW 2017; 12:262-270. [PMID: 29358995 PMCID: PMC5771450 DOI: 10.5114/pg.2017.72101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 08/20/2016] [Indexed: 02/07/2023]
Abstract
Introduction Despite recent diagnostic and therapeutic improvements, pancreas cancer remains one of the highly lethal cancers. The extracellular matrix (ECM) is a physiological barrier that limits the spread of cancer cells into surrounding tissues and distant organs. Disintegrin and metalloprotease with thrombospondin motifs (ADAMTS) is a family of 19 proteases, which is involved in various biological processes such as ECM remodelling and anti-angiogenesis. Aim To investigate the expression of ADAMTS1, 8, 9, and 18 proteinases in pancreas adenocarcinoma and its nodal metastasis. Material and methods The immunostaining status of ADAMTS1, 8, 9, and 18 were investigated in formalin-fixed paraffin-embedded samples of 25 patients who underwent pancreaticoduodenectomy for an adenocarcinoma located at the head of the pancreas. Results In semi-quantitive grading pathologically, ADAMTS1, 8, 9, and 18 were found to be highly stained in all cancerous pancreas samples compared with normal pancreas. In addition, the immune positivity of ADAMTS1, 9, and 18 was found to be higher in metastatic lymph nodes than in non-metastatic lymph tissue. Tumour size was correlated with ADAMTS9 and 18 expressions in cancerous pancreas. Conclusions According to the data obtained from the study, we suggest that these four ADAMTSs may have significant roles in the tumorigenesis and nodal spread of pancreas adenocarcinoma.
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Stromal Versican Regulates Tumor Growth by Promoting Angiogenesis. Sci Rep 2017; 7:17225. [PMID: 29222454 PMCID: PMC5722896 DOI: 10.1038/s41598-017-17613-6] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 11/27/2017] [Indexed: 01/01/2023] Open
Abstract
The proteoglycan versican is implicated in growth and metastases of several cancers. Here we investigated a potential contribution of stromal versican to tumor growth and angiogenesis. We initially determined versican expression by several cancer cell lines. Among these, MDA-MB231 and B16F10 had none to minimal expression in contrast to Lewis lung carcinoma (LLC). Notably, tumors arising from these cell lines had higher versican levels than the cell lines themselves suggesting a contribution from the host-derived tumor stroma. In LLC-derived tumors, both the tumor and stroma expressed versican at high levels. Thus, tumor stroma can make a significant contribution to tumor versican content. Versican localized preferentially to the vicinity of tumor vasculature and macrophages in the tumor. However, an ADAMTS protease-generated versican fragment uniquely localized to vascular endothelium. To specifically determine the impact of host/stroma-derived versican we therefore compared growth of tumors from B16F10 cells, which produced littleversican, in Vcan hdf/+ mice and wild-type littermates. Tumors in Vcan hdf/+ mice had reduced growth with a lower capillary density and accumulation of capillaries at the tumor periphery. These findings illustrate the variability of tumor cell line expression of versican, and demonstrate that versican is consistently contributed by the stromal tissue, where it contributes to tumor angiogenesis.
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Akyol S, Kursunlu SF, Akyol O. Bone resorption, matrix metalloproteinases and caffeic acid phenethyl ester. ACTA ORTHOPAEDICA ET TRAUMATOLOGICA TURCICA 2016; 50:706-707. [PMID: 27965046 PMCID: PMC6197418 DOI: 10.1016/j.aott.2016.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 11/11/2015] [Indexed: 12/03/2022]
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Akyol S, Cömertoğlu I, Firat R, Çakmak Ö, Yukselten Y, Erden G, Ugurcu V, Demircan K. Effect of insulin on the mRNA expression of procollagen N-proteinases in chondrosarcoma OUMS-27 cells. Oncol Lett 2015; 10:1091-1096. [PMID: 26622631 DOI: 10.3892/ol.2015.3317] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 04/14/2015] [Indexed: 12/30/2022] Open
Abstract
Chondrosarcoma is one of the most common bone tumors, and at present, there is no non-invasive treatment option for this cancer. The chondrosarcoma OUMS-27 cell line produces proteoglycan and type II, IX, and XI collagens, which constitutes cartilage tissue. A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) proteases are a group of secreted proteases, which include the procollagen N-proteinases ADAMTS-2, -3 and -14. These procollagen N-proteinases perform a role in the processing of procollagens to collagen and the maturation of type I collagen. The present study aimed to improve the understanding of the causes of metastasis, local invasion and resistance to chemo- and radiotherapy in chondrosarcoma, as well as the effect of insulin on cancer cells. The present study was designed to reveal the effects of insulin on procollagen N-proteinases in chondrosarcoma OUMS-27 cells. The cells were cultured in Dulbecco's modified Eagle's medium (DMEM) alone or in DMEM containing 10 µg/ml insulin. The medium was changed every other day for 11 days. The cells were harvested on days 1, 3, 7 and 11, and total RNA isolation was performed immediately following harvesting. The expression levels of ADAMTS2, ADAMTS3 and ADAMTS14 mRNA were estimated by reverse transcription-quantitative polymerase chain reaction using appropriate primers. ADAMTS2 mRNA expression was found to be decreased on day 7 (P=0.028) and increased at day 11 compared with the control group (P=0.016). The increase in mRNA concentration at day 11 was significantly different compared to the concentrations on days 3 (P=0.047) and 7 (P=0.008). The expression of ADAMTS3 mRNA decreased immediately subsequent to insulin induction on day 1 compared with the control group (P=0.008). The most evident decrease in mRNA concentration was seen at day 7 subsequent to insulin induction (P=0.008). The present results demonstrated that ADAMTS2 and ADAMTS3 may perform a role in the invasion and metastasis of tumors, and may also possess proteolytic activity that results in the breakdown of the extracellular matrix (ECM). Insulin itself can modulate the biosynthesis of ECM macromolecules that are altered in diabetes through various pathways.
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Affiliation(s)
- Sumeyya Akyol
- Department of Medical Biology, Turgut Ozal University School of Medicine, Ankara, Ankara 06170, Turkey
| | - Ismail Cömertoğlu
- Department of Medical Genetics, Faculty of Medicine, Mevlana University, Selcuklu, Konya 42003, Turkey
| | - Ridvan Firat
- Division of Clinical Biochemistry Laboratory, Golbasi Hospital, Ministry of Health, Golbasi, Ankara 06830, Turkey
| | - Özlem Çakmak
- Department of Biology, Faculty of Education, Gazi University, Ankara, Ankara 06500, Turkey
| | - Yunus Yukselten
- Department of Medical Biology, Faculty of Medicine, Ankara University, Sihhiye, Ankara 06100, Turkey
| | - Gönül Erden
- Department of Clinical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Ankara 06100, Turkey
| | - Veli Ugurcu
- Department of Medical Biochemistry, Faculty of Medicine, Dumlupinar University, Kutahya, Kutahya 43266, Turkey
| | - Kadir Demircan
- Department of Medical Biology, Turgut Ozal University School of Medicine, Ankara, Ankara 06170, Turkey
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Serum and aqueous xanthine oxidase levels, and mRNA expression in anterior lens epithelial cells in pseudoexfoliation. Graefes Arch Clin Exp Ophthalmol 2015; 253:1161-7. [PMID: 25957764 DOI: 10.1007/s00417-015-3043-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 04/18/2015] [Accepted: 04/29/2015] [Indexed: 01/26/2023] Open
Abstract
PURPOSE The aim of this study was to determine serum and aqueous xanthine oxidase (XO) levels, and mRNA expression in anterior lens epithelial cells in pseudoexfoliation (PEX). METHODS In this prospective study, serum, aqueous and anterior lens capsules were taken from 21 patients with PEX and 23 normal subjects who had undergone routine cataract surgery. Serum and aqueous XO levels were analyzed using the colorimetric method. mRNA expression of XO in anterior lens epithelial cells was evaluated using reverse transcription polymerase chain reaction analysis. RESULTS Serum XO levels (means ± standard deviations) were 207.0 ± 86.1 IU/mL and 240.6 ± 114.1 IU/mL in the normal and PEX groups, respectively (p = 0.310). Aqueous XO levels (means ± standard deviations) were 65.5 ± 54.3 IU/mL in the normal group and 130.5 ± 117.4 IU/mL in the PEX group (p = 0.028). There was a 2.9 fold decrease in mRNA expression in anterior lens epithelial cells of PEX, which is significantly lower than the normal group (p = 0.01). CONCLUSIONS Higher aqueous XO levels lacking associated different serum XO suggests higher oxidative stress in the aqueous. Higher aqueous XO levels in PEX with decreased mRNA expression in anterior lens epithelial cells indicate possible overexpression of XO in other structures related to the aqueous.
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Demircan K, Yonezawa T, Takigawa T, Topcu V, Erdogan S, Ucar F, Armutcu F, Yigitoglu MR, Ninomiya Y, Hirohata S. ADAMTS1, ADAMTS5, ADAMTS9 and aggrecanase-generated proteoglycan fragments are induced following spinal cord injury in mouse. Neurosci Lett 2013; 544:25-30. [PMID: 23562508 DOI: 10.1016/j.neulet.2013.02.064] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 02/22/2013] [Accepted: 02/25/2013] [Indexed: 12/13/2022]
Abstract
ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) proteinases are involved in a variety of biological processes such as angiogenesis, cancer and arthritis. ADAMTSs appears to be responsible for the cleavage of proteoglycans in several tissues including brain and cartilage. Chondroitin sulfate proteoglycans (CSPGs) maintains the integrity of the brain extracellular matrix and major inhibitory contributors for glial scar and neural plasticity. The activity of aggrecanases in the central nervous system (CNS) has been reported. ADAMTSs are an enzyme degrading CSPGs in the brain. However, there is a little knowledge regarding ADAMTSs in the CNS. We investigated the expression levels of ADAMTSs mRNAs by RT-PCR after spinal cord injury in mouse. Transcripts encoding 4 of the 19 known ADAMTSs were evaluated in the mouse spinal cord following injury. ADAMTS1, -5 and -9 expression levels were found to be upregulated. No change was observed in ADAMTS4 expression. By means of immunohistochemistry, ADAMTSs were detected in the astrocytes implying its cellular source in SCI. Western blot analyses indicated that aggrecanase-generated proteoglycan fragments are produced after SCI.
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Affiliation(s)
- Kadir Demircan
- Department of Medical Biology, Turgut Ozal University School of Medicine, Ankara, Turkey.
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