1
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Lambi AG, Harris MY, Amin M, Joiner PG, Hilliard BA, Assari S, Popoff SN, Barbe MF. Blocking CCN2 Reduces Established Bone Loss Induced by Prolonged Intense Loading by Increasing Osteoblast Activity in Rats. JBMR Plus 2023; 7:e10783. [PMID: 37701153 PMCID: PMC10494513 DOI: 10.1002/jbm4.10783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/22/2023] [Accepted: 05/26/2023] [Indexed: 09/14/2023] Open
Abstract
We have an operant model of reaching and grasping in which detrimental bone remodeling is observed rather than beneficial adaptation when rats perform a high-repetition, high-force (HRHF) task long term. Here, adult female Sprague-Dawley rats performed an intense HRHF task for 18 weeks, which we have shown induces radial trabecular bone osteopenia. One cohort was euthanized at this point (to assay the bone changes post task; HRHF-Untreated). Two other cohorts were placed on 6 weeks of rest while being simultaneously treated with either an anti-CCN2 (FG-3019, 40 mg/kg body weight, ip; twice per week; HRHF-Rest/anti-CCN2), or a control IgG (HRHF-Rest/IgG), with the purpose of determining which might improve the trabecular bone decline. Results were compared with food-restricted control rats (FRC). MicroCT analysis of distal metaphysis of radii showed decreased trabecular bone volume fraction (BV/TV) and thickness in HRHF-Untreated rats compared with FRCs; responses improved with HRHF-Rest/anti-CCN2. Rest/IgG also improved trabecular thickness but not BV/TV. Histomorphometry showed that rest with either treatment improved osteoid volume and task-induced increases in osteoclasts. Only the HRHF-Rest/anti-CCN2 treatment improved osteoblast numbers, osteoid width, mineralization, and bone formation rate compared with HRHF-Untreated rats (as well as the latter three attributes compared with HRHF-Rest/IgG rats). Serum ELISA results were in support, showing increased osteocalcin and decreased CTX-1 in HRHF-Rest/anti-CCN2 rats compared with both HRHF-Untreated and HRHF-Rest/IgG rats. These results are highly encouraging for use of anti-CCN2 for therapeutic treatment of bone loss, such as that induced by chronic overuse. © 2023 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Alex G Lambi
- Department of Orthopedics and RehabilitationUniversity of New MexicoAlbuquerqueNMUSA
| | - Michele Y Harris
- Center for Translational Medicine, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
| | - Mamta Amin
- Center for Translational Medicine, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
| | - Patrice G Joiner
- Center for Translational Medicine, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
| | - Brendan A Hilliard
- Center for Translational Medicine, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
| | | | - Steven N Popoff
- Department of Biomedical Education and Data Science, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
| | - Mary F Barbe
- Center for Translational Medicine, Lewis Katz School of MedicineTemple UniversityPhiladelphiaPAUSA
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2
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Shimo T, Takebe H, Fujii S, Hosoya A. Immunohistochemical Analysis of CCN2 in Experimental Fracture Healing Models. Methods Mol Biol 2023; 2582:335-342. [PMID: 36370361 DOI: 10.1007/978-1-0716-2744-0_23] [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
Skeletal fractures are most common large-organ traumatic injuries that impact the functions and esthetic outcomes and quality of life. Unfortunately, infection during the fracture healing process and inadequate blood supply to the bone impede reduced ability to produce cartilage and effective bone callus formation, leading to nonunion or delayed union fracture. Therefore, studying the mechanism of fracture healing is an important task in solving the problem of fracture healing failure. Animal models of bone fracture healing are important tools to investigate the pathogenesis and develop treatment strategies. This protocol introduces researchers to a bone repair model utilizing the ribs of rats and the immunohistological expression of cellular communication network factor/connective tissue growth factor (CTGF/CCN2) during the fracture healing processes.
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Affiliation(s)
- Tsuyoshi Shimo
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan.
| | - Hiroaki Takebe
- Division of Histology, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Saki Fujii
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Human Biology and Pathophysiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
| | - Akihiro Hosoya
- Division of Histology, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan
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3
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Fu M, Peng D, Lan T, Wei Y, Wei X. Multifunctional regulatory protein connective tissue growth factor (CTGF): A potential therapeutic target for diverse diseases. Acta Pharm Sin B 2022; 12:1740-1760. [PMID: 35847511 PMCID: PMC9279711 DOI: 10.1016/j.apsb.2022.01.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/22/2021] [Accepted: 12/16/2021] [Indexed: 12/24/2022] Open
Abstract
Connective tissue growth factor (CTGF), a multifunctional protein of the CCN family, regulates cell proliferation, differentiation, adhesion, and a variety of other biological processes. It is involved in the disease-related pathways such as the Hippo pathway, p53 and nuclear factor kappa-B (NF-κB) pathways and thus contributes to the developments of inflammation, fibrosis, cancer and other diseases as a downstream effector. Therefore, CTGF might be a potential therapeutic target for treating various diseases. In recent years, the research on the potential of CTGF in the treatment of diseases has also been paid more attention. Several drugs targeting CTGF (monoclonal antibodies FG3149 and FG3019) are being assessed by clinical or preclinical trials and have shown promising outcomes. In this review, the cellular events regulated by CTGF, and the relationships between CTGF and pathogenesis of diseases are systematically summarized. In addition, we highlight the current researches, focusing on the preclinical and clinical trials concerned with CTGF as the therapeutic target.
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4
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Barbe MF, Amin M, Gingery A, Lambi AG, Popoff SN. Blocking CCN2 preferentially inhibits osteoclastogenesis induced by repetitive high force bone loading. Connect Tissue Res 2021; 62:115-132. [PMID: 32683988 PMCID: PMC8189320 DOI: 10.1080/03008207.2020.1788546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Purpose/Aim: We recently found that blocking CCN2 signaling using a monoclonal antibody (FG-3019) may be a novel therapeutic strategy for reducing overuse-induced tissue fibrosis. Since CCN2 plays roles in osteoclastogenesis, and persistent performance of a high repetition high force (HRHF) lever pulling task results in a loss in trabecular bone volume in the radius, we examined here whether blocking CCN2 signaling would reduce the early catabolic effects of performing a HRHF task for 3 weeks. Materials and Methods: Young adult, female, Sprague-Dawley rats were operantly shaped to learn to pull at high force levels, before performing the HRHF task for 3 weeks. HRHF task rats were then left untreated (HRHF Untreated), treated in task weeks 2 and 3 with a monoclonal antibody that antagonizes CCN2 (HRHF+FG-3019), or treated with an IgG (HRHF+IgG), while continuing to perform the task. Non-task control rats were left untreated. Results: In metaphyseal trabeculae of the distal radius, HRHF Untreated and HRHF-IgG rats showed increased osteoblast numbers and other indices of bone formation, compared to controls, yet decreased trabecular bone volume, increased osteoclast numbers, and increased serum CTX-1 (a serum biomarker of bone resorption). HRHF+FG-3019 rats also showed increased osteoblast numbers and bone formation, but in contrast to HRHF Untreated and HRHF-IgG rats, showed higher trabecular bone volume, and reduced osteoclast numbers and serum CTX-1 levels (and statistically similar to Control levels). Conclusions: HRHF loading increased bone formation in each task group, yet blocking CCN2 dampened trabecular bone catabolism by reducing osteoclast numbers and activity.
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Affiliation(s)
- Mary F Barbe
- Department of Anatomy & Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Mamta Amin
- Department of Anatomy & Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Anne Gingery
- Department of Orthopedic Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alex G Lambi
- Division of Plastic & Reconstructive Surgery, University of California, Los Angeles David Geffen School of Medicine, Los Angeles, CA, USA
| | - Steven N Popoff
- Department of Anatomy & Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
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5
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Tang L, Xu M, Zhang L, Qu L, Liu X. Role of αVβ3 in Prostate Cancer: Metastasis Initiator and Important Therapeutic Target. Onco Targets Ther 2020; 13:7411-7422. [PMID: 32801764 PMCID: PMC7395689 DOI: 10.2147/ott.s258252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/19/2020] [Indexed: 12/14/2022] Open
Abstract
In prostate cancer, distant organ metastasis is the leading cause of patient death. Although the mechanism of malignant tumor metastasis is unclear, studies have confirmed that integrin αVβ3 plays an important role in this process. In prostate cancer, αVβ3 mediates adhesion, invasion, immune escape and neovascularization through interactions with different ligands. Among these ligands and in addition to proteins that are directly related to tumor invasion, other proteins that contain the RGD structure could also bind to αVβ3 and cause a number of biological effects. In this article, we summarized the ligand and downstream proteins related to αVβ3-mediated prostate cancer metastasis as well as some diagnostic and therapeutic measures targeting αVβ3.
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Affiliation(s)
- Lin Tang
- College of Mathematics and Computer Science, Chifeng University, Chifeng, The Inner Mongol Autonomous Region 024005, People's Republic of China
| | - Meng Xu
- Department of Urology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121000, People's Republic of China.,R&D Department, Seekgene Technology Co., Ltd, Beijing 100000, People's Republic of China
| | - Long Zhang
- Department of Hepatobiliary Surgery, Yidu Central Hospital, Weifang, Shandong 262500, People's Republic of China
| | - Lin Qu
- Department of Orthopaedic Surgery, Anshan Hospital of the First Hospital of China Medical University, Anshan, Liaoning 114000, People's Republic of China
| | - Xiaoyan Liu
- Department of Pathology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100000, People's Republic of China
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6
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Keenan CM, Ramos-Mucci L, Kanakis I, Milner PI, Leask A, Abraham D, Bou-Gharios G, Poulet B. Post-traumatic osteoarthritis development is not modified by postnatal chondrocyte deletion of Ccn2. Dis Model Mech 2020; 13:dmm044719. [PMID: 32616521 PMCID: PMC7375478 DOI: 10.1242/dmm.044719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 05/29/2020] [Indexed: 01/20/2023] Open
Abstract
CCN2 is a matricellular protein involved in several crucial biological processes. In particular, CCN2 is involved in cartilage development and in osteoarthritis. Ccn2 null mice exhibit a range of skeletal dysmorphisms, highlighting its importance in regulating matrix formation during development; however, its role in adult cartilage remains unclear. The aim of this study was to determine the role of CCN2 in postnatal chondrocytes in models of post-traumatic osteoarthritis (PTOA). Ccn2 deletion was induced in articular chondrocytes of male transgenic mice at 8 weeks of age. PTOA was induced in knees either surgically or non-invasively by repetitive mechanical loading at 10 weeks of age. Knee joints were harvested, scanned with micro-computed tomography and processed for histology. Sections were stained with Toluidine Blue and scored using the Osteoarthritis Research Society International (OARSI) grading system. In the non-invasive model, cartilage lesions were present in the lateral femur, but no significant differences were observed between wild-type (WT) and Ccn2 knockout (KO) mice 6 weeks post-loading. In the surgical model, severe cartilage degeneration was observed in the medial compartments, but no significant differences were observed between WT and Ccn2 KO mice at 2, 4 and 8 weeks post-surgery. We conclude that Ccn2 deletion in chondrocytes does not modify the development of PTOA in mice, suggesting that chondrocyte expression of CCN2 in adults is not a crucial factor in protecting cartilage from the degeneration associated with PTOA.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Craig M Keenan
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
| | - Lorenzo Ramos-Mucci
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
| | - Ioannis Kanakis
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
| | - Peter I Milner
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
| | - Andrew Leask
- College of Dentistry, University of Saskatchewan, Saskatoon, SK S7N 5E4, Canada
| | - David Abraham
- Centre for Rheumatology and Connective Tissue Diseases, University College London, London NW3 2PF, UK
| | - George Bou-Gharios
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
| | - Blandine Poulet
- Department of Musculoskeletal and Ageing Science, Institute of Life Course and Medical Sciences, University of Liverpool, William Henry Duncan Building, West Derby Street, Liverpool L7 8TX, UK
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7
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Scimeca M, Trivigno D, Bonfiglio R, Ciuffa S, Urbano N, Schillaci O, Bonanno E. Breast cancer metastasis to bone: From epithelial to mesenchymal transition to breast osteoblast-like cells. Semin Cancer Biol 2020; 72:155-164. [PMID: 32045651 DOI: 10.1016/j.semcancer.2020.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/13/2020] [Accepted: 01/13/2020] [Indexed: 02/06/2023]
Abstract
In this review we highlighted the newest aspects concerning the physiopathology of breast cancer metastatization into the bone including: a) in situ biomarkers of breast cancer metastatic diseases, b) biological processes related to the origin of metastatic cells (epithelial to mesenchymal transition), c) the nature and the possible role of Breast Osteoblast-Like Cells in the formation of bone lesions and d) the prognostic value of breast microcalcifications for the bone metastatic disease. In addition, the more recent data about the biology of breast cancer metastatic process and the origin and function of Breast Osteoblast-Like Cells have been analyzed to propose the use of molecular imaging investigations able to identify early neoplastic lesions with high propensity to form bone metastasis in vivo.
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Affiliation(s)
- Manuel Scimeca
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Rome, 00133, Italy; San Raffaele University, Via di Val Cannuta 247, 00166, Rome, Italy; Fondazione Umberto Veronesi (FUV), Piazza Velasca 5, 20122, Milano, Mi, Italy; Saint Camillus International University of Health Sciences, Via di Sant'Alessandro, 8, 00131 Rome, Italy.
| | - Donata Trivigno
- Department of Experimental Medicine, University "Tor Vergata", Via Montpellier 1, Rome, 00133, Italy
| | - Rita Bonfiglio
- Department of Experimental Medicine, University "Tor Vergata", Via Montpellier 1, Rome, 00133, Italy
| | - Sara Ciuffa
- Department of Clinical Sciences and Translational Medicine, University of Rome "Tor Vergata", 00133, Rome, Italy
| | | | - Orazio Schillaci
- Department of Biomedicine and Prevention, University of Rome "Tor Vergata", Via Montpellier 1, Rome, 00133, Italy; IRCCS Neuromed, Pozzilli, Italy
| | - Elena Bonanno
- Department of Experimental Medicine, University "Tor Vergata", Via Montpellier 1, Rome, 00133, Italy; "Diagnostica Medica" and "Villa dei Platani", Avellino, Italy
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8
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Kim B, Kim H, Jung S, Moon A, Noh DY, Lee ZH, Kim HJ, Kim HH. A CTGF-RUNX2-RANKL Axis in Breast and Prostate Cancer Cells Promotes Tumor Progression in Bone. J Bone Miner Res 2020; 35:155-166. [PMID: 31505052 DOI: 10.1002/jbmr.3869] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 08/27/2019] [Accepted: 08/28/2019] [Indexed: 02/06/2023]
Abstract
Metastasis to bone is a frequent occurrence in patients with breast and prostate cancers and inevitably threatens the patient's quality of life and survival. Identification of cancer-derived mediators of bone metastasis and osteolysis may lead to novel therapeutic strategies. In this study, we established highly bone-metastatic PC3 prostate and MDA-MB-231 (MDA) breast cancer cell sublines by in vivo selection in mice. In bone-metastatic cancer cells, the expression and secretion of connective tissue growth factor (CTGF) were highly upregulated. CTGF knockdown in bone-metastatic cells decreased invasion activity and MMP expression. RUNX2 overexpression in the CTGF knockdown cells restored the invasion activity and MMP expression. In addition, CTGF increased RUNX2 protein stability by inducing its acetylation via p300 acetyl transferase. The integrin αvβ3 receptor mediated these effects of CTGF. Furthermore, CTGF promoted RUNX2 recruitment to the RANKL promoter, resulting in increased RANKL production from the tumor cells and subsequent stimulation of osteoclastogenesis from precursor cells. In addition, animal model with injection of CTGF knocked-down prostate cancer cells into 6-week old BALB/c male mice showed reduced osteolytic lesions. More importantly, the expression levels of CTGF and RANKL showed a strong positive correlation in human primary breast tumor tissues and were higher in bone metastases than in other site metastases. These findings indicate that CTGF plays crucial roles for osteolytic bone metastasis both by enhancing invasiveness of tumor cells and by producing RANKL for osteoclastogenesis. Targeting CTGF may lead to the development of effective preventive and therapeutic strategies for osteolytic metastasis. © 2019 American Society for Bone and Mineral Research.
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Affiliation(s)
- Bongjun Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Haemin Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea.,Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery/Weill Cornell Medicine, New York, NY, USA
| | - Suhan Jung
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Aree Moon
- College of Pharmacy, Duksung Women's University, Seoul, South Korea
| | - Dong-Young Noh
- Department of Surgery and Cancer Research Institute, College of Medicine, Seoul National University, Seoul, South Korea
| | - Zang Hee Lee
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
| | - Hyung Joon Kim
- Department of Oral Physiology, BK21 PLUS Project, and Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Hong-Hee Kim
- Department of Cell and Developmental Biology, BK21 Program and DRI, Seoul National University, School of Dentistry, Seoul, South Korea
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Takigawa M. An early history of CCN2/CTGF research: the road to CCN2 via hcs24, ctgf, ecogenin, and regenerin. J Cell Commun Signal 2017; 12:253-264. [PMID: 29076115 DOI: 10.1007/s12079-017-0414-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 09/27/2017] [Indexed: 02/06/2023] Open
Abstract
The principal aim of this historical review is to present the processes by which the different aspects of CCN2/CTGF/Hcs24 were discovered by different groups and how much CCN2/CTGF, by being integrated into CCN family, has contributed to the establishment of the basic concepts regarding the role and functions of this new class of proteins. This review should be particularly useful to new investigators who have recently entered this exciting field of study and also provides a good opportunity to acknowledge the input of those individuals who participated in the development of this scientific field.
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Affiliation(s)
- Masaharu Takigawa
- Advanced Research Center for Oral and Craniofacial Sciences (ARCOCS), Okayama University Dental School/Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Okayama, 700-8525, Japan.
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10
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Abstract
Recombinant CCN2 protein (rCCN2) is available from many companies; however, most of them are produced in E. coli. To investigate true functions of rCCN2, glycosylated protein with proper folding needs to be used. Therefore, we use rCCN2 produced by mammalian cells. Conditioned medium (CM) of HeLa cells stably transfected with a CCN2 expression vector are collected, and the recombinant CCN2 protein produced and secreted into the CM is purified by two-step chromatography, first with a heparin affinity column and then with an anti-CCN2 affinity column prepared with a monoclonal antibody against CCN2. The purified rCCN2 shows the bands of 36-38 kDa with sliver staining after gel electrophoresis, which can be confirmed by Western blotting. This chapter describes these methods in detail.
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11
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Khattab HM, Aoyama E, Kubota S, Takigawa M. Physical interaction of CCN2 with diverse growth factors involved in chondrocyte differentiation during endochondral ossification. J Cell Commun Signal 2015; 9:247-54. [PMID: 25895141 DOI: 10.1007/s12079-015-0290-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 04/07/2015] [Indexed: 02/06/2023] Open
Abstract
CCN family member 2 (CCN2) has been shown to promote the proliferation and differentiation of chondrocytes, osteoblasts, osteoclasts, and vascular endothelial cells. In addition, a number of growth factors and cytokines are known to work in harmony to promote the process of chondrogenesis and chondrocyte differentiation toward endochondral ossification. Earlier we showed that CCN2 physically interacts with some of them, suggesting that multiple effects of CCN2 on various differentiation stages of chondrocytes may be attributed to its interaction with these growth factors and cytokines. However, little is known about the functional interaction occurring between CCN2 and other growth factors and cytokines in promoting chondrocyte proliferation and differentiation. In this study we sought to shed light on the binding affinities between CCN2 and other essential growth factors and cytokines known to be regulators of chondrocyte differentiation. Using the surface plasmon resonance assay, we analyzed the dissociation constant between CCN2 and each of the following: TGF-β1, TGF-β3, IGF-I, IGF-II, PDGF-BB, GDF5, PTHrP, and VEGF. We found a strong association between CCN2 and VEGF, as well as a relatively high association with TGF-β1, TGF-β3, PDGF-BB, and GDF-5. However, the sensorgrams obtained for possible interaction between CCN2 and IGF-I, IGF-II or PTHrP showed no response. This study underlines the correlation between CCN2 and certain other growth factors and cytokines and suggests the possible participation of such interaction in the process of chondrogenesis and chondrocyte differentiation toward endochondral ossification.
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Affiliation(s)
- Hany Mohamed Khattab
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan
| | - Eriko Aoyama
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan
| | - Satoshi Kubota
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan.,Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan
| | - Masaharu Takigawa
- Advanced Research Center for Oral and Craniofacial Sciences, Okayama University Dental School, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525, Japan.
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12
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Li J, Dong N, Cheng S, Li X, Wang W, Xiang Y. Tetramethylpyrazine inhibits CTGF and Smad2/3 expression and proliferation of hepatic stellate cells. BIOTECHNOL BIOTEC EQ 2015; 29:124-131. [PMID: 26019625 PMCID: PMC4433940 DOI: 10.1080/13102818.2014.984382] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 06/27/2014] [Indexed: 12/04/2022] Open
Abstract
To study the effects of tetramethylpyrazine (TMP) on the proliferation of hepatic stellate cells-T6 (HSC-T6), and the expression of connective tissue growth factor (CTGF) and Smad2/3 in these cells, HSC-T6 cells were cultured with TMP at different concentrations after transforming growth factor-β1 (TGF-β1) stimulation. MTT assay was used to assess the cell proliferation. Cells were divided into the control group, TGF-β1-treated group and TMP-treated groups, which were treated with different concentrations of TMP. Immunocytochemistry and western blot were performed to detect the expression levels of CTGF and Smad2/3 in HSC-T6 cells. MTT analysis indicated that TMP significantly inhibited the proliferation of HSC-T6 cells, in dose-dependent and time-dependent manners. Immunocytochemistry detection and western blot showed that TMP could diminish TGF-β1-induced CTGF over-expression in HSC-T6 cells. Similarly, the enhancing effects of TGF-β1 on Smad2/3 expressions in HSC-T6 cells could also be counteracted by TMP treatment. Nuclear translocation of Smad2/3 was blocked by TMP treatment. Correlation analysis suggested a positive correlation between CTGF and Smad2/3 expression levels in HSC-T6 cells. TMP exerts anti-hepatic fibrosis effect through decreasing the expression of CTGF and Smad2/3, as well as inhibiting the proliferation of HSC-T6 cells. Our study provides cellular and molecular bases for further application of TMP in the clinical treatment for hepatic fibrosis.
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Affiliation(s)
- Jun Li
- Department of Endodontics, The Affiliated Hospital of Stomatology, Chongqing Medical University , Chongqing 400010 , China ; Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing 401147 , China
| | - Ni Dong
- Department of Endodontics, The Affiliated Hospital of Stomatology, Chongqing Medical University , Chongqing 400010 , China ; Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences , Chongqing 401147 , China
| | - Shuang Cheng
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University , Chongqing 400010 , China
| | - Xiaosheng Li
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University , Chongqing 400010 , China
| | - Wenli Wang
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University , Chongqing 400010 , China
| | - Ying Xiang
- Department of Gastroenterology, The Second Affiliated Hospital of Chongqing Medical University , Chongqing 400010 , China
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13
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Wang BW, Jiang L, Dong Z, Li BW, Shu SS, Gu W, Liu X, Tian JL. Synthesis, crystal structure, magnetism, and biological activities of an oxo-bridged diiron(III) complex. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.931574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Bi-Wei Wang
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Lin Jiang
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Zhang Dong
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Bo-Wen Li
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Si-Sheng Shu
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Wen Gu
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Xin Liu
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
| | - Jin-Lei Tian
- Department of Chemistry, Nankai University, Tianjin, PR China
- Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Tianjin, PR China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin, PR China
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Abstract
CCN family member 2 (CCN2), also known as connective tissue growth factor (CTGF), has been suggested to be an endochondral ossification genetic factor that has been termed “ecogenin”, because in vitro studies revealed that CCN2 promotes the proliferation and differentiation of growth-plate chondrocytes, osteoblasts, and vascular endothelial cells, all of which play important roles in endochondral ossification. In addition to its action toward these three types of cells, CCN2 was recently found to promote the formation of osteoclasts in vitro, which cells play an important role in the replacement of cartilage by bone during endochondral ossification, thus strengthening the “ecogenin” hypothesis. For confirmation of this hypothesis, transgenic mice over-expressing CCN2 in cartilage were generated. The results proved the hypothesis; i.e., the over-expression of CCN2 in cartilage stimulated the proliferation and differentiation of growth-plate chondrocytes, resulting in the promotion of endochondral ossification. In addition to its “ecogenin” action, CCN2 had earlier been shown to promote the differentiation of various cartilage cells including articular cartilage cells. In accordance with these findings, cartilage-specific overexpression of CCN2 in the transgenic mice was shown to protect against the development of osteoarthritic changes in aging articular cartilage. Thus, CCN2 may also play a role as an anti-aging (chondroprotective) factor, stabilizing articular cartilage. CCN2 also had been shown to promote intramembranous ossification, regenerate cartilage and bone, and induce angiogenesis in vivo. For understanding of the molecular mechanism underlying such multifunctional actions, yeast two-hybrid analysis, protein array analysis, solid-phase binding assay, and surface plasmon resonance (SPR) analysis have been used to search for binding partners of CCN2. ECMs such as fibronectin and aggrecan, growth factors including BMPs and FGF2 and their receptors such as FGFR1 and 2 and RANK, as well as CCN family members themselves, were shown to bind to CCN2. Regarding the interaction of CCN2 with some of them, various binding modules in the CCN2 molecule have been identified. Therefore, the numerous biological actions of CCN2 would depend on what kinds of binding partners and what levels of them are present in the microenvironment of different types of cells, as well as on the state of differentiation of these cells. Through this mechanism, CCN2 would orchestrate various signaling pathways, acting as a signal conductor to promote harmonized skeletal growth and regeneration.
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Benjamin S, Sheyn D, Ben-David S, Oh A, Kallai I, Li N, Gazit D, Gazit Z. Oxygenated environment enhances both stem cell survival and osteogenic differentiation. Tissue Eng Part A 2013; 19:748-58. [PMID: 23215901 DOI: 10.1089/ten.tea.2012.0298] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Osteogenesis of mesenchymal stem cells (MSCs) is highly dependent on oxygen supply. We have shown that perfluorotributylamine (PFTBA), a synthetic oxygen carrier, enhances MSC-based bone formation in vivo. Exploring this phenomenon's mechanism, we hypothesize that a transient increase in oxygen levels using PFTBA will affect MSC survival, proliferation, and differentiation, thus increasing bone formation. To test this hypothesis, MSCs overexpressing bone morphogenetic protein 2 were encapsulated in alginate beads that had been supplemented with an emulsion of PFTBA or phosphate-buffered saline. Oxygen measurements showed that supplementation of PFTBA significantly increased the available oxygen level during a 96-h period. PFTBA-containing beads displayed an elevation in cell viability, which was preserved throughout 2 weeks, and a significantly lower ratio of dead cells throughout the experiment. Furthermore, the cells from the control group expressed significantly more hypoxia-related genes such as VEGF, DDIT3, and PKG1. Additionally, PFTBA supplementation led to an increase in the osteogenic differentiation and to a decrease in chondrogenic differentiation of MSCs. In conclusion, PFTBA increases the oxygen availability in the vicinity of the MSCs, which suffer oxygen exhaustion shortly after encapsulation in alginate beads. Consequently, cell survival is increased, and hypoxia-related genes are downregulated. In addition, PFTBA promotes osteogenic differentiation over chondrogeneic differentiation, and thereby can accelerate MSC-based bone regeneration.
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Affiliation(s)
- Shimon Benjamin
- Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
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16
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Muromachi K, Kamio N, Narita T, Annen-Kamio M, Sugiya H, Matsushima K. MMP-3 provokes CTGF/CCN2 production independently of protease activity and dependently on dynamin-related endocytosis, which contributes to human dental pulp cell migration. J Cell Biochem 2012; 113:1348-58. [PMID: 22134873 DOI: 10.1002/jcb.24007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Matrix metalloproteinase-3 (MMP-3) expression is promoted after pulpotomy, and application of MMP-3 to dental pulp after pulpotomy accelerates angiogenesis and hard tissue formation. However, the mechanism by which MMP-3 promotes dental pulp wound healing is still unclear. Connective tissue growth factor/CCN family 2 (CTGF/CCN2), a protein belonging to the CCN family, is considered to participate in wound healing, angiogenesis, and cell migration. In this study, we examined the involvement of CTGF/CCN2 in MMP-3-induced cell migration in human dental pulp (fibroblast-like) cells. In human dental pulp cells, MMP-3 promoted cell migration, but this effect was clearly blocked in the presence of anti-CTGF/CCN2 antibody. MMP-3 provoked mRNA and protein expression and secretion of CTGF/CCN2 in a concentration- and time-dependent manner. The MMP-3 inhibitor NNGH failed to suppress MMP-3-induced CTGF/CCN2 protein expression. The potent dynamin inhibitor dynasore clearly inhibited MMP-3-induced CTGF/CCN2 expression. These results strongly suggest that MMP-3 induces CTGF/CCN2 production independently of the protease activity of MMP-3 and dependently on dynamin-related endocytosis, which is involved in cell migration in human dental pulp cells.
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Affiliation(s)
- Koichiro Muromachi
- Department of Endodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan.
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17
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Hu Y, Yang HF, Li S, Chen JZ, Luo YW, Yang C. Condyle and mandibular bone change after unilateral condylar neck fracture in growing rats. Int J Oral Maxillofac Surg 2012; 41:912-21. [DOI: 10.1016/j.ijom.2011.12.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 10/13/2011] [Accepted: 12/09/2011] [Indexed: 11/29/2022]
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18
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Geisinger MT, Astaiza R, Butler T, Popoff SN, Planey SL, Arnott JA. Ets-1 is essential for connective tissue growth factor (CTGF/CCN2) induction by TGF-β1 in osteoblasts. PLoS One 2012; 7:e35258. [PMID: 22539964 PMCID: PMC3335151 DOI: 10.1371/journal.pone.0035258] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 03/14/2012] [Indexed: 11/18/2022] Open
Abstract
Background Ets-1 controls osteoblast differentiation and bone development; however, its downstream mechanism of action in osteoblasts remains largely undetermined. CCN2 acts as an anabolic growth factor to regulate osteoblast differentiation and function. CCN2 is induced by TGF-β1 and acts as a mediator of TGF-β1 induced matrix production in osteoblasts; however, the molecular mechanisms that control CCN2 induction are poorly understood. In this study, we investigated the role of Ets-1 for CCN2 induction by TGF-β1 in primary osteoblasts. Results We demonstrated that Ets-1 is expressed and induced by TGF-β1 treatment in osteoblasts, and that Ets-1 over-expression induces CCN2 protein expression and promoter activity at a level similar to TGF-β1 treatment alone. Additionally, we found that simultaneous Ets-1 over-expression and TGF-β1 treatment synergize to enhance CCN2 induction, and that CCN2 induction by TGF-β1 treatment was impaired using Ets-1 siRNA, demonstrating the requirement of Ets-1 for CCN2 induction by TGF-β1. Site-directed mutagenesis of eight putative Ets-1 motifs (EBE) in the CCN2 promoter demonstrated that specific EBE sites are required for CCN2 induction, and that mutation of EBE sites in closer proximity to TRE or SBE (two sites previously shown to regulate CCN2 induction by TGF-β1) had a greater effect on CCN2 induction, suggesting potential synergetic interaction among these sites for CCN2 induction. In addition, mutation of EBE sites prevented protein complex binding, and this protein complex formation was also inhibited by addition of Ets-1 antibody or Smad 3 antibody, demonstrating that protein binding to EBE motifs as a result of TGF-β1 treatment require synergy between Ets-1 and Smad 3. Conclusions This study demonstrates that Ets-1 is an essential downstream signaling component for CCN2 induction by TGF-β1 in osteoblasts, and that specific EBE sites in the CCN2 promoter are required for CCN2 promoter transactivation in osteoblasts.
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Affiliation(s)
- Max T. Geisinger
- Basic Sciences Department, The Commonwealth Medical College, Scranton, Pennsylvania, United States of America
| | - Randy Astaiza
- Basic Sciences Department, The Commonwealth Medical College, Scranton, Pennsylvania, United States of America
| | - Tiffany Butler
- Basic Sciences Department, The Commonwealth Medical College, Scranton, Pennsylvania, United States of America
| | - Steven N. Popoff
- Department of Anatomy and Cell Biology, Temple University School of Medicine, Philadelphia, Pennsylvania, United States of America
| | - Sonia Lobo Planey
- Basic Sciences Department, The Commonwealth Medical College, Scranton, Pennsylvania, United States of America
| | - John A. Arnott
- Basic Sciences Department, The Commonwealth Medical College, Scranton, Pennsylvania, United States of America
- * E-mail:
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19
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Nahles S, Nack C, Gratecap K, Lage H, Nelson JJ, Nelson K. Bone physiology in human grafted and non-grafted extraction sockets - an immunohistochemical study. Clin Oral Implants Res 2012; 24:812-9. [DOI: 10.1111/j.1600-0501.2012.02462.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2012] [Indexed: 01/08/2023]
Affiliation(s)
- Susanne Nahles
- Oral- and Maxillofacial Surgery; Charité Campus Virchow; Berlin; Germany
| | - Claudia Nack
- Oral- and Maxillofacial Surgery; Charité Campus Virchow; Berlin; Germany
| | - Kerrin Gratecap
- Oral- and Maxillofacial Surgery; Charité Campus Virchow; Berlin; Germany
| | - Hermann Lage
- Department of Pathology; Campus Mitte, Charite; Berlin; Germany
| | - John J. Nelson
- Department of Pathology; University of South Alabama; Mobile; Alabama; USA
| | - Katja Nelson
- Department of CMF-Surgery; University of Freiburg; Berlin; Germany
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20
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Ouellet V, Siegel PM. CCN3 modulates bone turnover and is a novel regulator of skeletal metastasis. J Cell Commun Signal 2012; 6:73-85. [PMID: 22427255 PMCID: PMC3368020 DOI: 10.1007/s12079-012-0161-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 02/15/2012] [Indexed: 12/16/2022] Open
Abstract
The CCN family of proteins is composed of six secreted proteins (CCN1-6), which are grouped together based on their structural similarity. These matricellular proteins are involved in a large spectrum of biological processes, ranging from development to disease. In this review, we focus on CCN3, a founding member of this family, and its role in regulating cells within the bone microenvironment. CCN3 impairs normal osteoblast differentiation through multiple mechanisms, which include the neutralization of pro-osteoblastogenic stimuli such as BMP and Wnt family signals or the activation of pathways that suppress osteoblastogenesis, such as Notch. In contrast, CCN3 is known to promote chondrocyte differentiation. Given these functions, it is not surprising that CCN3 has been implicated in the progression of primary bone cancers such as osteosarcoma, Ewing’s sarcoma and chondrosarcoma. More recently, emerging evidence suggests that CCN3 may also influence the ability of metastatic cancers to colonize and grow in bone.
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Affiliation(s)
- Véronique Ouellet
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Room 513, Montreal, Quebec Canada H3A 1A3
| | - Peter M. Siegel
- Goodman Cancer Research Centre, McGill University, 1160 Pine Avenue West, Room 513, Montreal, Quebec Canada H3A 1A3
- Departments of Anatomy and Cell Biology, Biochemistry and Medicine, McGill University, Montreal, Quebec Canada
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21
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Arnott JA, Lambi AG, Mundy C, Hendesi H, Pixley RA, Owen TA, Safadi FF, Popoff SN. The role of connective tissue growth factor (CTGF/CCN2) in skeletogenesis. Crit Rev Eukaryot Gene Expr 2012; 21:43-69. [PMID: 21967332 DOI: 10.1615/critreveukargeneexpr.v21.i1.40] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Connective tissue growth factor (CTGF) is a 38 kDa, cysteine rich, extracellular matrix protein composed of 4 domains or modules. CTGF has been shown to regulate a diverse array of cellular functions and has been implicated in more complex biological processes such as angiogenesis, chondrogenesis, and osteogenesis. A role for CTGF in the development and maintenance of skeletal tissues first came to light in studies demonstrating its expression in cartilage and bone cells, which was dramatically increased during skeletal repair or regeneration. The physiological significance of CTGF in skeletogenesis was confirmed in CTGF-null mice, which exhibited multiple skeletal dysmorphisms as a result of impaired growth plate chondrogenesis, angiogenesis, and bone formation/mineralization. Given the emerging importance of CTGF in osteogenesis and chondrogenesis, this review will focus on its expression in skeletal tissues, its effects on osteoblast and chondrocyte differentiation and function, and the skeletal implications of ablation or over-expression of CTGF in knockout or transgenic mouse models, respectively. In addition, this review will examine the role of integrin-mediated signaling and the regulation of CTGF expression as it relates to skeletogenesis. We will emphasize CTGF studies in bone or bone cells, and will identify opportunities for future investigations concerning CTGF and chondrogenesis/osteogenesis.
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Affiliation(s)
- John A Arnott
- Basic Sciences Department, The Commonwealth Medical College, Scranton, PA, USA
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22
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Taking aim at the extracellular matrix: CCN proteins as emerging therapeutic targets. Nat Rev Drug Discov 2011; 10:945-63. [PMID: 22129992 DOI: 10.1038/nrd3599] [Citation(s) in RCA: 496] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Members of the CCN family of matricellular proteins are crucial for embryonic development and have important roles in inflammation, wound healing and injury repair in adulthood. Deregulation of CCN protein expression or activities contributes to the pathobiology of various diseases - many of which may arise when inflammation or tissue injury becomes chronic - including fibrosis, atherosclerosis, arthritis and cancer, as well as diabetic nephropathy and retinopathy. Emerging studies indicate that targeting CCN protein expression or signalling pathways holds promise in the development of diagnostics and therapeutics for such diseases. This Review summarizes the biology of CCN proteins, their roles in various pathologies and their potential as therapeutic targets.
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23
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Lau LF. CCN1/CYR61: the very model of a modern matricellular protein. Cell Mol Life Sci 2011; 68:3149-63. [PMID: 21805345 DOI: 10.1007/s00018-011-0778-3] [Citation(s) in RCA: 249] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 07/19/2011] [Accepted: 07/19/2011] [Indexed: 02/08/2023]
Abstract
CCN1 (CYR61) is a dynamically expressed, multifunctional matricellular protein that plays essential roles in cardiovascular development during embryogenesis, and regulates inflammation, wound healing and fibrogenesis in the adult. Aberrant CCN1 expression is associated with myriad pathologies, including various cancers and diseases associated with chronic inflammation. CCN1 promotes diverse and sometimes opposing cellular responses, which can be ascribed, as least in part, to disparate activities mediated through its direct binding to distinct integrins in different cell types and contexts. Accordingly, CCN1 promotes cell proliferation, survival and angiogenesis by binding to integrin α(v)β(3), and induces apoptosis and senescence through integrin α(6)β(1) and heparan sulfate proteoglycans. The ability of CCN1 to trigger the accumulation of a robust and sustained level of reactive oxygen species underlies some of its unique activities as a matrix cell-adhesion molecule. Emerging studies suggest that CCN1 might be useful as a biomarker or therapeutic target in certain diseases.
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Affiliation(s)
- Lester F Lau
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago College of Medicine, 900 S. Ashland Avenue, Chicago, IL 60607, USA.
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24
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The role of CCN2 in cartilage and bone development. J Cell Commun Signal 2011; 5:209-17. [PMID: 21484188 PMCID: PMC3145877 DOI: 10.1007/s12079-011-0123-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 01/21/2011] [Indexed: 12/30/2022] Open
Abstract
CCN2, a classical member of the CCN family of matricellular proteins, is a key molecule that conducts cartilage development in a harmonized manner through novel molecular actions. During vertebrate development, all cartilage is primarily formed by a process of mesenchymal condensation, while CCN2 is induced to promote this process. Afterwards, cartilage develops into several subtypes with different fates and missions, in which CCN2 plays its proper roles according to the corresponding microenvironments. The history of CCN2 in cartilage and bone began with its re-discovery in the growth cartilage in long bones, which determines the skeletal size through the process of endochondral ossification. CCN2 promotes physiological developmental processes not only in the growth cartilage but also in the other types of cartilages, i.e., Meckel's cartilage representing temporary cartilage without autocalcification, articular cartilage representing hyaline cartilage with physical stiffness, and auricular cartilage representing elastic cartilage. Together with its significant role in intramembranous ossification, CCN2 is regarded as a conductor of skeletogenesis. During cartilage development, the CCN2 gene is dynamically regulated to yield stage-specific production of CCN2 proteins at both transcriptional and post-transcriptional levels. New functional aspects of known biomolecules have been uncovered during the course of investigating these regulatory systems in chondrocytes. Since CCN2 promotes integrated regeneration as well as generation (=development) of these tissues, its utility in regenerative therapy targeting chondrocytes and osteoblasts is indicated, as has already been supported by experimental evidence obtained in vivo.
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Nishida T, Emura K, Kubota S, Lyons KM, Takigawa M. CCN family 2/connective tissue growth factor (CCN2/CTGF) promotes osteoclastogenesis via induction of and interaction with dendritic cell-specific transmembrane protein (DC-STAMP). J Bone Miner Res 2011; 26:351-63. [PMID: 20721934 PMCID: PMC3836692 DOI: 10.1002/jbmr.222] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
CCN family 2/connective tissue growth factor (CCN2/CTGF) promotes endochondral ossification. However, the role of CCN2 in the replacement of hypertrophic cartilage with bone is still unclear. The phenotype of Ccn2 null mice, having an expanded hypertrophic zone, indicates that the resorption of the cartilage extracellular matrix is impaired therein. Therefore, we analyzed the role of CCN2 in osteoclastogenesis because cartilage extracellular matrix is resorbed mainly by osteoclasts during endochondral ossification. Expression of the Ccn2 gene was upregulated in mouse macrophage cell line RAW264.7 on day 6 after treatment of glutathione S transferase (GST) fusion mouse receptor activator of NF-κB ligand (GST-RANKL), and a combination of recombinant CCN2 (rCCN2) and GST-RANKL significantly enhanced tartrate-resistant acid phosphatase (TRACP)-positive multinucleated cell formation compared with GST-RANKL alone. Therefore, we suspected the involvement of CCN2 in cell-cell fusion during osteoclastogenesis. To clarify the mechanism, we performed real-time PCR analysis of gene expression, coimmunoprecipitation analysis, and solid-phase binding assay of CCN2 and dendritic cell-specific transmembrane protein (DC-STAMP), which is involved in cell-cell fusion. The results showed that CCN2 induced and interacted with DC-STAMP. Furthermore, GST-RANKL-induced osteoclastogenesis was impaired in fetal liver cells from Ccn2 null mice, and the impaired osteoclast formation was rescued by the addition of exogenous rCCN2 or the forced expression of DC-STAMP by a retroviral vector. These results suggest that CCN2 expressed during osteoclastogenesis promotes osteoclast formation via induction of and interaction with DC-STAMP.
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Affiliation(s)
- Takashi Nishida
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
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26
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Biological implications of growth factors in bone remodeling following fracture, surgical resection and bonegrafting. Part 1: Transforming growth factors, bone morphogenetic proteins and related factors. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.ajoms.2010.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Sims-Lucas S, Young RJ, Martinez G, Taylor D, Grimmond SM, Teasdale R, Little MH, Bertram JF, Caruana G. Redirection of renal mesenchyme to stromal and chondrocytic fates in the presence of TGF-β2. Differentiation 2010; 79:272-84. [DOI: 10.1016/j.diff.2010.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 01/14/2010] [Accepted: 01/31/2010] [Indexed: 02/04/2023]
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Reich A, Maziel SS, Ashkenazi Z, Ornan EM. Involvement of matrix metalloproteinases in the growth plate response to physiological mechanical load. J Appl Physiol (1985) 2010; 108:172-80. [DOI: 10.1152/japplphysiol.00821.2009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Enzymes from the matrix metalloproteinase (MMP) family play a crucial role in growth-plate vascularization and ossification via proteolytic cleavage and remodeling of the extracellular matrix. Their regulation in the growth plate is crucial for normal matrix assembly. Endochondral ossification, which takes place at the growth plates, is influenced by mechanical loading. Using an in vivo avian model for mechanical loading, we have found increased blood penetration into the growth plates of loaded chicks. The purpose of this work was to study the involvement of MMP-2, -3, -9, -13, and -16 in the growth plate's response to loading and in the catch-up growth resulting from load release. We found that mechanical loading, as well as release from load, upregulated MMP-2, -9, and -13 expressions. In contrast, MMP-3, associated with cartilage injuries, and its associated protein connective tissue growth factor (CTGF), were downregulated by the load. However, after release from load, MMP-3 was upregulated and CTGF levels were elevated and caught up with the control. MMP-3 and CTGF were also downregulated after 60 min of mechanical stretching in vitro. These results demonstrate the central role of MMPs in the growth plate's response to mechanical loading, as well as in the catch-up growth followed load release.
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Affiliation(s)
- Adi Reich
- Institute of Biochemistry and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot, Israel
| | - Stav Simsa Maziel
- Institute of Biochemistry and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot, Israel
| | - Ziv Ashkenazi
- Institute of Biochemistry and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot, Israel
| | - Efrat Monsonego Ornan
- Institute of Biochemistry and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University, Rehovot, Israel
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Sumiyoshi K, Kubota S, Furuta RA, Yasui K, Aoyama E, Kawaki H, Kawata K, Ohgawara T, Yamashiro T, Takigawa M. Thrombopoietic-mesenchymal interaction that may facilitate both endochondral ossification and platelet maturation via CCN2. J Cell Commun Signal 2009; 4:5-14. [PMID: 19798594 PMCID: PMC2821475 DOI: 10.1007/s12079-009-0067-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 09/09/2009] [Indexed: 11/27/2022] Open
Abstract
CCN2 plays a central role in the development and growth of mesenchymal tissue and promotes the regeneration of bone and cartilage in vivo. Of note, abundant CCN2 is contained in platelets, which is thought to play an important role in the tissue regeneration process. In this study, we initially pursued the possible origin of the CCN2 in platelets. First, we examined if the CCN2 in platelets was produced by megakaryocyte progenitors during differentiation. Unexpectedly, neither megakaryocytic CMK cells nor megakaryocytes that had differentiated from human haemopoietic stem cells in culture showed any detectable CCN2 gene expression or protein production. Together with the fact that no appreciable CCN2 was detected in megakaryocytes in vivo, these results suggest that megakaryocytes themselves do not produce CCN2. Next, we suspected that mesenchymal cells situated around megakaryocytes in the bone marrow were stimulated by the latter to produce CCN2, which was then taken up by platelets. To evaluate this hypothesis, we cultured human chondrocytic HCS-2/8 cells with medium conditioned by differentiating megakaryocyte cultures, and then monitored the production of CCN2 by the cells. As suspected, CCN2 production by HCS-2/8 was significantly enhanced by the conditioned medium. We further confirmed that human platelets were able to absorb/uptake exogenous CCN2 in vitro. These findings indicate that megakaryocytes secrete some unknown soluble factor(s) during differentiation, which factor stimulates the mesenchymal cells to produce CCN2 for uptake by the platelets. We also consider that, during bone growth, such thrombopoietic-mesenchymal interaction may contribute to the hypertrophic chondrocyte-specific accumulation of CCN2 that conducts endochondral ossification.
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Affiliation(s)
- Kumi Sumiyoshi
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
- Department of Orthodontics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Satoshi Kubota
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
| | | | | | - Eriko Aoyama
- Biodental Research Center, Okayama University Dental School, Okayama, Japan
| | - Harumi Kawaki
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
| | - Kazumi Kawata
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
| | - Toshihiro Ohgawara
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
| | - Takashi Yamashiro
- Department of Orthodontics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Masaharu Takigawa
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8525 Japan
- Biodental Research Center, Okayama University Dental School, Okayama, Japan
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30
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Pagel CN, Song SJ, Loh LH, Tudor EM, Murray-Rust TA, Pike RN, Mackie EJ. Thrombin-stimulated growth factor and cytokine expression in osteoblasts is mediated by protease-activated receptor-1 and prostanoids. Bone 2009; 44:813-21. [PMID: 19442625 DOI: 10.1016/j.bone.2008.12.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Revised: 12/22/2008] [Accepted: 12/31/2008] [Indexed: 11/26/2022]
Abstract
Thrombin exerts multiple effects upon osteoblasts including stimulating proliferation, and inhibiting osteoblast differentiation and apoptosis. Some of these effects are believed to be mediated by the synthesis and secretion of autocrine factors such as growth factors and cytokines. Many but not all cellular responses to thrombin are mediated by members of the protease-activated receptor (PAR) family of G protein-coupled receptors. The current study was undertaken to investigate the nature of thrombin's induction of autocrine factors by analysing the expression of twelve candidate genes in thrombin-stimulated primary mouse osteoblasts. Analysis by quantitative reverse transcription polymerase chain reaction (qRT-PCR) demonstrated that thrombin induced transforming growth factor beta, cyclooxygenase-2, tenascin C, fibroblast growth factor-1 and -2, connective tissue growth factor and interleukin-6 expression in wild type osteoblasts, but not PAR-1 null mouse osteoblasts. Induction of all the thrombin-responsive genes was blocked by the presence of the non-selective cyclooxygenase inhibitor indomethacin. Further studies were conducted on interleukin-6, which was the gene that showed the greatest increase in expression following stimulation of osteoblast-like cells with thrombin. A PAR-1-specific activating peptide, but neither a PAR-4-activating peptide nor catalytically inactive thrombin induced release of interleukin-6 by osteoblasts. Furthermore, in the presence of the selective cyclooxygenase-1 and -2 inhibitors SC-560 and NS-398 thrombin-induced interleukin-6 release was prevented. Levels of both prostaglandin E(2) and interleukin-6 in medium conditioned by thrombin-stimulated osteoblast-like cells were found to be significantly increased compared to medium conditioned by non-stimulated cells, however release of prostaglandin E(2) was found to precede release of interleukin-6. Treatment of isolated osteoblast-like cells with a number of synthetic prostanoids stimulated secretion of interleukin-6 with differing potencies. These studies suggest that activation of PAR-1 on osteoblasts by thrombin induces cyclooxygenase activity, which in turn results in the increased expression of multiple secreted factors. The induction of these secreted factors may act in an autocrine fashion to alter osteoblast function, allowing these cells to participate in the earliest stages of bone healing by both autocrine and paracrine mechanisms.
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Affiliation(s)
- Charles N Pagel
- School of Veterinary Science, University of Melbourne, Parkville, Victoria, Australia
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31
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Kikuchi T, Kubota S, Asaumi K, Kawaki H, Nishida T, Kawata K, Mitani S, Tabata Y, Ozaki T, Takigawa M. Promotion of bone regeneration by CCN2 incorporated into gelatin hydrogel. Tissue Eng Part A 2009. [PMID: 19230129 DOI: 10.1089/tea.2007.0167] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
CCN family protein 2/connective tissue growth factor (CCN2/CTGF) is a unique molecule that promotes the entire endochondral ossification process and regeneration of damaged articular cartilage. Also, CCN2 has been shown to enhance the adhesion and migration of bone marrow stromal cells as well as the growth and differentiation of osteoblasts; hence, its utility in bone regeneration has been suggested. Here, we evaluated the effect of CCN2 on the regeneration of an intractable bone defect in a rat model. First, we prepared two recombinant CCN2s of different origins, and the one showing the stronger effect on osteoblasts in vitro was selected for further evaluation, based on the result of an in vitro bioassay. Next, to obtain a sustained effect, the recombinant CCN2 was incorporated into gelatin hydrogel that enabled the gradual release of the factor. Evaluation in vivo indicated that CCN2 continued to be released at least for up to 14 days after its incorporation. Application of the gelatin hydrogel-CCN2 complex, together with a collagen scaffold to the bone defect prepared in a rat femur resulted in remarkable induction of osteoblastic mineralization markers within 2 weeks. Finally, distinct enhancement of bone regeneration was observed 3 weeks after the application of the complex. These results confirm the utility of CCN2 in the regeneration of intractable bone defects in vivo when the factor is incorporated into gelatin hydrogel.
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Affiliation(s)
- Takeshi Kikuchi
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
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32
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Chen CC, Lau LF. Functions and mechanisms of action of CCN matricellular proteins. Int J Biochem Cell Biol 2008; 41:771-83. [PMID: 18775791 DOI: 10.1016/j.biocel.2008.07.025] [Citation(s) in RCA: 393] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 07/25/2008] [Accepted: 07/25/2008] [Indexed: 12/21/2022]
Abstract
Members of the CCN (CYR61/CTGF/NOV) family have emerged as dynamically expressed, extracellular matrix-associated proteins that play critical roles in cardiovascular and skeletal development, injury repair, fibrotic diseases and cancer. The synthesis of CCN proteins is highly inducible by serum growth factors, cytokines, and environmental stresses such as hypoxia, UV exposure, and mechanical stretch. Consisting of six secreted proteins in vertebrate species, CCNs are typically comprised of four conserved cysteine-rich modular domains. They function primarily through direct binding to specific integrin receptors and heparan sulfate proteoglycans, thereby triggering signal transduction events that culminate in the regulation of cell adhesion, migration, proliferation, gene expression, differentiation, and survival. CCN proteins can also modulate the activities of several growth factors and cytokines, including TGF-beta, TNFalpha, VEGF, BMPs, and Wnt proteins, and may thereby regulate a broad array of biological processes. Recent studies have uncovered novel CCN activities unexpected for matricellular proteins, including their ability to induce apoptosis as cell adhesion substrates, to dictate the cytotoxicity of inflammatory cytokines such as TNFalpha, and to promote hematopoietic stem cell self-renewal. As potent regulators of angiogenesis and chondrogenesis, CCNs are essential for successful cardiovascular and skeletal development during embryogenesis. In the adult, the expression of CCN proteins is associated with injury repair and inflammation, and has been proposed as diagnostic or prognostic markers for diabetic nephropathy, hepatic fibrosis, systemic sclerosis, and several types of cancer. Targeting CCN signaling pathways may hold promise as a strategy of rational therapeutic design.
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Affiliation(s)
- Chih-Chiun Chen
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago College of Medicine, Chicago, IL 60607, United States
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33
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Kikuchi T, Kubota S, Asaumi K, Kawaki H, Nishida T, Kawata K, Mitani S, Tabata Y, Ozaki T, Takigawa M. Promotion of Bone Regeneration by CCN2 Incorporated into Gelatin Hydrogel. Tissue Eng Part A 2008; 14:1089-98. [DOI: 10.1089/ten.tea.2007.0167] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Takeshi Kikuchi
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Satoshi Kubota
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Koji Asaumi
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Harumi Kawaki
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Takashi Nishida
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Kazumi Kawata
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Shigeru Mitani
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Masaharu Takigawa
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
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Arnott JA, Zhang X, Sanjay A, Owen TA, Smock SL, Rehman S, DeLong WG, Safadi FF, Popoff SN. Molecular requirements for induction of CTGF expression by TGF-beta1 in primary osteoblasts. Bone 2008; 42:871-85. [PMID: 18314002 PMCID: PMC2430079 DOI: 10.1016/j.bone.2008.01.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Revised: 11/30/2007] [Accepted: 01/03/2008] [Indexed: 01/05/2023]
Abstract
Connective tissue growth factor (CTGF/CCN2) is a cysteine rich, extracellular matrix protein that acts as an anabolic growth factor to regulate osteoblast differentiation and function. In osteoblasts, CTGF is induced by TGF-beta1 where it acts as a downstream mediator of TGF-beta1 induced matrix production. The molecular mechanisms that control CTGF induction by TGF-beta1 in osteoblasts are not known. To assess the role of individual Smads in mediating the induction of CTGF by TGF-beta1, we used specific Smad siRNAs to block Smad expression. These studies demonstrated that Smads 3 and 4, but not Smad 2, are required for TGF-beta1 induced CTGF promoter activity and expression in osteoblasts. Since the activation of MAPKs (Erk, Jnk and p38) by TGF-beta1 is cell type specific, we were interested in determining the role of individual MAPKs in TGF-beta1 induction of CTGF promoter activity and expression. Using dominant negative (DN) mutants for Erk, Jnk and p38, we demonstrated that the expression of DN-Erk caused a significant inhibition of TGF-beta1 induced CTGF promoter activity. In contrast, the expression of DN-p38 or DN-Jnk failed to inhibit activation of CTGF promoter activity. To confirm the vital role of Erk, we used the Erk inhibitor (PD98059) to block its activation, demonstrating that it prevented TGF-beta1 activation of the CTGF promoter and up-regulation of CTGF expression in osteoblasts. Since Src can also act as a downstream signaling effector for TGF-beta in some cell types, we determined its role in TGF-beta1 induction of CTGF in osteoblasts. Treatment of osteoblasts with a Src family kinase inhibitor, PP2, or the expression of two independent kinase-dead Src mutant constructs caused significant inhibition of TGF-beta1 induced CTGF promoter activity and expression. Additionally, blocking Src activation prevented Erk activation by TGF-beta1 demonstrating a role for Src as an upstream mediator of Erk in regulating CTGF expression in osteoblasts. To investigate the involvement of the TGF-beta1 response element (TRE) and the SMAD binding element (SBE) in CTGF induction, we cloned the rat CTGF proximal promoter (-787 to +1) containing the TRE and SBE motifs into a pGL3-Luciferase reporter construct. Using a combination of CTGF promoter deletion constructs and site-directed mutants, we demonstrated the unique requirement of both the TRE and SBE for CTGF induction by TGF-beta1 in osteoblasts. Electro-mobility shift assays using specific probes containing the TRE, SBE or both showed TGF-beta1 inducible complexes that can be ablated by mutation of the respective motif, confirming their requirement for TGF-beta1 induced CTGF promoter activity. In conclusion, these studies demonstrate that CTGF induction by TGF-beta1 in osteoblasts involves Smads 3 and 4, the Erk and Src signaling pathways, and requires both the TRE and SBE motifs in the CTGF proximal promoter.
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Affiliation(s)
- J A Arnott
- Department of Anatomy and Cell Biology, Temple University School of Medicine, Philadelphia, PA 19140, USA
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Ono M, Kubota S, Fujisawa T, Sonoyama W, Kawaki H, Akiyama K, Shimono K, Oshima M, Nishida T, Yoshida Y, Suzuki K, Takigawa M, Kuboki T. Promotion of Hydroxyapatite-Associated, Stem Cell-Based Bone Regeneration by CCN2. Cell Transplant 2008; 17:231-40. [DOI: 10.3727/000000008783907143] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Multiple roles have been already recognized for CCN2 in cartilage development and regeneration. However, the effects of CCN2 on bone regeneration remain to be elucidated. In this study, the utility of CCN2 on bone regeneration was examined in vitro and in vivo in combination with hydroxyapatite (HAp) as a scaffold. Human bone marrow stromal cells (hBMSCs) were isolated from human iliac bone marrow aspirates of healthy donors and expanded, and the effects of CCN2 on their proliferation and migration were examined in vitro. The proliferation of hBMSCs on a plastic or HAp plate was significantly enhanced by CCN2. Moreover, the migration of hBMSCs also dramatically increased by CCN2. Interestingly, a C-terminal signal modular fragment of CCN2 (CT-module) also enhanced the cell proliferation and migration as efficiently as the full-length CCN2. Next, in order to estimate the effect of CCN2 on the migration and survival of hBMSCs and bone formation inside the HAp scaffold in vivo, two experiments were performed. First, the porous HAp carrier was cultured with hBMSCs for a week, and the cell–scaffold hybrid was transplanted with or without CCN2 subcutaneously into immunocompromised mice. CCN2 accelerated the hBMSC-like cell migration and survival inside the porous HAp within 4 weeks after transplantation. Second, the porous HAp carrier with or without CCN2 was directly implanted into bone defects within a rabbit mandible, and bone regeneration inside was evaluated. As a result, CCN2 efficiently induced the cell invasion and bone formation inside the porous HAp scaffold. These findings suggest that CCN2 and its CT-module fragment could be useful for regeneration and reconstruction of large-scale bone defects.
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Affiliation(s)
- Mitsuaki Ono
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Satoshi Kubota
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Takuo Fujisawa
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Wataru Sonoyama
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Harumi Kawaki
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Kentaro Akiyama
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Kengo Shimono
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Masamitsu Oshima
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Takashi Nishida
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuhiro Yoshida
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuomi Suzuki
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Masaharu Takigawa
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Takuo Kuboki
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
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36
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Oka M, Kubota S, Kondo S, Eguchi T, Kuroda C, Kawata K, Minagi S, Takigawa M. Gene expression and distribution of connective tissue growth factor (CCN2/CTGF) during secondary ossification center formation. J Histochem Cytochem 2007; 55:1245-55. [PMID: 17875658 DOI: 10.1369/jhc.7a7263.2007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
CCN2/connective tissue growth factor (CCN2/CTGF) is a critical signaling modulator of mesenchymal tissue development. This study investigated the localization and expression of CCN2/CTGF as a factor supporting angiogenesis and chondrogenesis during development of secondary ossification centers in the mouse tibial epiphysis. Formation of the secondary ossification center was initiated by cartilage canal formation and blood vessel invasion at 7 days of age, and onset of ossification was observed at 14 days. In situ hybridization showed that CCN2/CTGF mRNA was distinctively expressed in the region of the cartilage canal and capsule-attached marginal tissues at 7 days of age, and distinct expression was also observed in proliferating chondrocytes around the marrow space at 14 days of age. Immunostaining showed that CCN2/CTGF was distributed broadly around the expressed cells located in the central region of the epiphysis, where the chondrocytes become hypertrophic and the cartilage canal enters into the hypertrophic mass. Furthermore, an overlapping distribution of metalloproteinase (MMP)9 and CCN2/CTGF was found in the secondary ossification center. These findings suggest that the CCN2/CTGF is involved in establishing epiphyseal vascularization and remodeling, which eventually determines the secondary ossification center in the developing epiphysial cartilage.
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Affiliation(s)
- Morihiko Oka
- Department of Biochemistry and Molecular Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8525, Japan
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37
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Ono M, Kubota S, Fujisawa T, Sonoyama W, Kawaki H, Akiyama K, Oshima M, Nishida T, Yoshida Y, Suzuki K, Takigawa M, Kuboki T. Promotion of attachment of human bone marrow stromal cells by CCN2. Biochem Biophys Res Commun 2007; 357:20-5. [PMID: 17399683 DOI: 10.1016/j.bbrc.2007.03.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2007] [Accepted: 03/07/2007] [Indexed: 11/17/2022]
Abstract
Cell attachment is a crucial step in tissue regeneration. In this study, human bone marrow stromal cells (hBMSCs) were isolated, and the effects of CCN2 on their attachment were examined. CCN2 significantly enhanced the hBMSC attachment, and this enhanced cell attachment was mainly regulated by the C-terminal module of CCN2. This enhancement was negated by the anti-integrin alpha(v)beta(3) antibody and p38 MAPK inhibitor, and phosphorylation of p38 MAPK was detected upon the enhanced cell attachment mediated by CCN2. We thus conclude that CCN2 enhances hBMSC attachment via integrin-p38 MAPK signal pathway. Enhanced hBMSC attachment on hydroxyapatite plates by CCN2 further indicated the utility of CCN2 in bone regeneration.
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Affiliation(s)
- Mitsuaki Ono
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Okayama 700-8525, Japan
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38
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Arnott JA, Nuglozeh E, Rico MC, Arango-Hisijara I, Odgren PR, Safadi FF, Popoff SN. Connective tissue growth factor (CTGF/CCN2) is a downstream mediator for TGF-beta1-induced extracellular matrix production in osteoblasts. J Cell Physiol 2007; 210:843-52. [PMID: 17133352 DOI: 10.1002/jcp.20917] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Connective tissue growth factor (CTGF/CCN2) is a cysteine-rich, extracellular matrix (ECM) protein that acts as an anabolic growth factor to regulate osteoblast differentiation and function. Recent studies have identified CTGF as a downstream effector of transforming growth factor-beta1 (TGF-beta1) for certain functions in specific cell types. In this study, we examined the role of CTGF as a downstream mediator of TGF-beta1-induced ECM production and cell growth in osteoblasts. Using primary cultures, we demonstrated that TGF-beta1 is a potent inducer of CTGF expression in osteoblasts, and that this induction occurred at all stages of osteoblast differentiation from the proliferative through mineralization stages. TGF-beta1 treatment of osteoblasts increased the expression and synthesis of the ECM components, collagen and fibronectin. When CTGF-specific siRNA was used to prevent TGF-beta1 induction of CTGF expression, it also inhibited collagen and fibronectin production, thereby demonstrating the requirement of CTGF for their up-regulation. To examine the effects of TGF-beta1 on osteoblast cell growth, cultures were treated with TGF-beta1 during the proliferative stage. Cell number was significantly reduced and the cells exhibited a decrease in G1 cyclin expression, consistent with TGF-beta1-induced cell-cycle arrest. Cultures transfected with CTGF siRNA prior to TGF-beta1 treatment showed an even greater reduction in cell number, suggesting that TGF-beta1-induced growth arrest is independent of CTGF in osteoblasts. Collectively, these data demonstrate for the first time that CTGF is an essential downstream mediator for TGF-beta1-induced ECM production in osteoblasts, but these two growth factors function independently regarding their opposing effects on osteoblast proliferation.
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Affiliation(s)
- J A Arnott
- Department of Anatomy and Cell Biology, Temple University School of Medicine, Philadelphia, Pennsylvania 19040, USA
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Abstract
Our bones mostly develop through a process called endochondral ossification. This process is initiated in the cartilage prototype of each bone and continues through embryonic and postnatal development until the end of skeletal growth. Therefore, the central regulator of endochondral ossification is the director of body construction, which is, in other words, the determinant of skeletal size and shape. We suggest that CCN2/CTGF/Hcs24 (CCN2) is a molecule that conducts all of the procedures of endochondral ossification. CCN2, a member of the CCN family of novel modulator proteins, displays multiple functions by manipulating the local information network, using its conserved modules as an interface with a variety of other biomolecules. Under a precisely designed four-dimensional genetic program, CCN2 is produced from a limited population of chondrocytes and acts on all of the mesenchymal cells inside the bone callus to promote the integrated growth of the bone. Furthermore, the utility of CCN2 as regenerative therapeutics against connective tissue disorders, such as bone and cartilage defects and osteoarthritis, has been suggested. Over the years, the pathological action of CCN2 has been suggested. Nevertheless, it can also be regarded as another aspect of the physiological and regenerative function of CCN2, which is discussed as well.
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Affiliation(s)
- Satoshi Kubota
- Department of Biochemistry and Molecular Dentistry, Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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40
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Leask A, Abraham DJ. All in the CCN family: essential matricellular signaling modulators emerge from the bunker. J Cell Sci 2006; 119:4803-10. [PMID: 17130294 DOI: 10.1242/jcs.03270] [Citation(s) in RCA: 521] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The CCN family is a group of six secreted proteins that specifically associate with the extracellular matrix. Structurally, CCN proteins are modular, containing up to four distinct functional domains. CCN family members are induced by growth factors and cytokines such as TGFβ and endothelin 1 and cellular stress such as hypoxia, and are overexpressed in pathological conditions that affect connective tissues, including scarring, fibrosis and cancer. Although CCN family members were discovered over a decade ago, the precise biological role, mechanism of action and physiological function of these proteins has remained elusive until recently, when several key mechanistic insights into the CCN family emerged. The CCNs have been shown to have key roles as matricellular proteins, serving as adaptor molecules connecting the cell surface and extracellular matrix (ECM). Although they appear not to have specific high-affinity receptors, they signal through integrins and proteoglycans. Furthermore, in addition to having inherent adhesive abilities that modulate focal adhesions and control cell attachment and migration, they execute their functions by modulating the activity of a variety of different growth factors, such as TGFβ. CCN proteins not only regulate crucial biological processes including cell differentiation, proliferation, adhesion, migration, apoptosis, ECM production, chondrogenesis and angiogenesis, but also have more sinister roles promoting conditions such as fibrogenesis.
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Affiliation(s)
- Andrew Leask
- CIHR Group in Skeletal Development and Remodeling, Division of Oral Biology, and Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A 5C1, Canada.
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41
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Blaney Davidson EN, Vitters EL, Mooren FM, Oliver N, Berg WBVD, van der Kraan PM. Connective tissue growth factor/CCN2 overexpression in mouse synovial lining results in transient fibrosis and cartilage damage. ACTA ACUST UNITED AC 2006; 54:1653-61. [PMID: 16646035 DOI: 10.1002/art.21795] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Characteristics of osteoarthritis (OA) include cartilage damage, fibrosis, and osteophyte formation. Connective tissue growth factor (CTGF; also known as CCN2), is found in high levels in OA chondrocytes and is frequently involved in fibrosis, bone formation, and cartilage repair. The present study was therefore undertaken to investigate the potential role of CTGF in OA pathophysiology. METHODS We transfected the synovial lining of mouse knee joints with a recombinant adenovirus expressing human CTGF and measured synovial fibrosis and proteoglycan content in cartilage on days 1, 3, 7, 14, and 28. Messenger RNA (mRNA) expression in synovium and cartilage was measured on days 3, 7, and 21. RESULTS CTGF induced synovial fibrosis, as indicated by accumulation of extracellular matrix and an increase in procollagen type I-positive cells. The fibrosis reached a maximum on day 7 and had reversed by day 28. Levels of mRNA for matrix metalloproteinase 3 (MMP-3), MMP-13, ADAMTS-4, ADAMTS-5, tissue inhibitor of metalloproteinases 1 (TIMP-1), and transforming growth factor beta were elevated in the fibrotic tissue. TIMP-1 expression was elevated on day 3, while expression of other genes did not increase until day 7 or later. CTGF induced proteoglycan depletion in cartilage as early as day 1. Maximal depletion was observed on days 3-7. Cartilage damage was reduced by day 28. A high level of MMP-3 mRNA expression was found in cartilage. CTGF overexpression did not induce osteophyte formation. CONCLUSION CTGF induces transient fibrosis that is reversible within 28 days. Overexpression of CTGF in knee joints results in reversible cartilage damage, induced either by the high CTGF levels or via factors produced by the CTGF-induced fibrotic tissue.
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Abstract
The CCN family currently comprises six members (CCN1-6) that regulate diverse cell functions, including mitogenesis, adhesion, apoptosis, extracellular matrix (ECM) production, growth arrest, and migration. These properties can result in a multiplicity of effects during development, differentiation, wound healing, and disease states, such as tumorigenesis and fibrosis. CCN proteins have emerged as major regulators of chondrogenesis, angiogenesis, and fibrogenesis. CCN proteins are mosaic in nature and consist of up to four structurally conserved modules, at least two of which are involved in binding to cell surfaces via molecules that include integrins, heparan sulfate proteoglycans, and low-density lipoprotein receptor-related protein. CCN proteins use integrins as signal transducing receptors to regulate context-dependent responses in individual cell types. The involvement of integrins in mediating CCN signaling allows for considerable plasticity in response because some effects are specific for certain integrin subtypes and integrin signaling is coordinated with other signaling pathways in the cell. In addition to their own biological properties, CCN proteins regulate the functions of other bioactive molecules (e.g., growth factors) via direct binding interactions. CCN molecules demonstrate complex multifaceted modes of action and regulation and have emerged as important matricellular regulators of cell function.
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Affiliation(s)
- Amy W Rachfal
- Center for Cell and Vascular Biology, Children's Research Institute, Columbus, Ohio 43205, USA
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43
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Shibata Y, Tsukazaki T, Hirata K, Xin C, Yamaguchi A. Role of a new member of IGFBP superfamily, IGFBP-rP10, in proliferation and differentiation of osteoblastic cells. Biochem Biophys Res Commun 2004; 325:1194-200. [PMID: 15555553 DOI: 10.1016/j.bbrc.2004.10.157] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2004] [Indexed: 11/29/2022]
Abstract
Bone regeneration is critically regulated by various molecules. To identify the new genes involved in bone regeneration, we performed microarray-based gene expression analysis using a mouse bone regeneration model. We identified a new member of the IGFBP superfamily, designated IGFBP-rP10, whose expression is up-regulated at the early phase of bone regeneration. IGFBP-rP10 consists of an IGFBP homologous domain followed by a Kazal-type protein inhibitor domain and an immunoglobulin G-like domain. A real-time-based RT-PCR analysis demonstrated that various tissues including bone expressed IGFBP-rP10 mRNA in various degrees, and confirmed an up-regulation at the early phase of bone regeneration. In situ hybridization revealed that osteoblastic cells expressed IGFPB-rP10 mRNA during bone regeneration. Bone morphogenetic protein-2 increased the expression level of IGFBP-rP10 mRNA in various cells including C3H10T1/2, MC3T3-E1, C2C12, and primary murine osteoblastic cells. The addition of recombinant mouse IGFBP-rP10 promoted the proliferation of these cells but failed to stimulate alkaline phosphatase activity. These results suggest that IGFBP-rP10 is involved in the proliferation of osteoblasts during bone formation and bone regeneration.
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Affiliation(s)
- Yasuaki Shibata
- Division of Oral Pathology and Bone Metabolism, Department of Developmental and Reconstructive Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
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Omoto S, Nishida K, Yamaai Y, Shibahara M, Nishida T, Doi T, Asahara H, Nakanishi T, Inoue H, Takigawa M. Expression and localization of connective tissue growth factor (CTGF/Hcs24/CCN2) in osteoarthritic cartilage. Osteoarthritis Cartilage 2004; 12:771-8. [PMID: 15450526 DOI: 10.1016/j.joca.2004.06.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2003] [Revised: 06/12/2004] [Accepted: 06/12/2004] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The investigation of the expression and localization of connective tissue growth factor/hypertrophic chondrocyte-specific gene product 24/CCN family member 2 (CTGF/Hcs24/CCN2) in normal and osteoarthritic (OA) cartilage, and quantification of CTGF/Hcs24-positive cells. METHODS Cartilage samples of patients (n=20) with late stage OA were obtained at total joint replacement surgery. Morphologically normal cartilage was harvested for comparison purposes from the femoral heads of 6 other patients with femoral neck fracture. Paraffin-embedded sections were stained by Safranin O. The severity of the OA lesions was divided into four stages (normal, early, moderate, and severe). The localization of protein and mRNA for CTGF/Hcs24 was investigated by immunohistochemistry and in situ hybridization, respectively. The population of CTGF/Hcs24-positive chondrocytes in OA cartilage and chondro-osteophyte was quantified by counting the number of the cells under light microscopy. RESULTS Signals for CTGF/Hcs24 were detected in a small percentage of chondrocytes throughout the layers of normal cartilage. In early stage OA cartilage, the CTGF/Hcs24-positive chondrocytes were localized mainly in the superficial layer. In moderate to severe OA cartilage, intense staining for CTGF/Hcs24 was observed in proliferating chondrocytes forming cell clusters next to the cartilage surface. In chondro-osteophyte, strong signals were found in the chondrocytes of the proliferative and hypertrophic zones. CONCLUSION CTGF/Hcs24 expression was detected in both normal and OA chondrocytes of human samples. The results of the current study suggested that expression of CTGF/Hcs24 was concomitant with development of OA lesions and chondrocyte differentiation in chondro-osteophyte.
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Affiliation(s)
- Shunsuke Omoto
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan
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Hermansson M, Sawaji Y, Bolton M, Alexander S, Wallace A, Begum S, Wait R, Saklatvala J. Proteomic Analysis of Articular Cartilage Shows Increased Type II Collagen Synthesis in Osteoarthritis and Expression of Inhibin βA (Activin A), a Regulatory Molecule for Chondrocytes. J Biol Chem 2004; 279:43514-21. [PMID: 15292256 DOI: 10.1074/jbc.m407041200] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We show that proteomic analysis can be applied to study cartilage pathophysiology. Proteins secreted by articular cartilage were analyzed by two-dimensional SDS-PAGE and mass spectrometry. Cartilage explants were cultured in medium containing [35S]methionine/cysteine to radiolabel newly synthesized proteins. To resolve the cartilage proteins by two-dimensional electrophoresis, it was necessary to remove the proteoglycan aggrecan by precipitation with cetylpyridinium chloride. 50-100 radiolabeled protein spots were detected on two-dimensional gels of human cartilage cultures. Of 170 silver-stained proteins identified, 19 were radiolabeled, representing newly synthesized gene products. Most of these were known cartilage constituents. Several nonradiolabeled cartilage proteins were also detected. The secreted protein pattern of explants from 12 osteoarthritic joints (knee, hip, and shoulder) and 14 nonosteoarthritic adult joints were compared. The synthesis of type II collagen was strongly up-regulated in osteoarthritic cartilage. Normal adult cartilage synthesized little or no type II collagen in contrast to infant and juvenile cartilage. Potential regulatory molecules novel to cartilage were identified; pro-inhibin betaA and processed inhibin betaA (which dimerizes to activin A) were produced by all the osteoarthritic samples and half of the normals. Connective tissue growth factor and cytokine-like protein C17 (previously only identified as an mRNA) were also found. Activin induced the tissue inhibitor for metalloproteinases-1 in human chondrocytes. Its expression was induced in isolated chondrocytes by growth factors or interleukin-1. We conclude that type II collagen synthesis in articular cartilage is down-regulated at skeletal maturity and reactivated in osteoarthritis in attempted repair and that activin A may be an anabolic factor in cartilage.
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Affiliation(s)
- Monika Hermansson
- Kennedy Institute of Rheumatology, Faculty of Medicine, Imperial College London, 1 Aspenlea Road, W6 8LH, UK.
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French DM, Kaul RJ, D'Souza AL, Crowley CW, Bao M, Frantz GD, Filvaroff EH, Desnoyers L. WISP-1 is an osteoblastic regulator expressed during skeletal development and fracture repair. THE AMERICAN JOURNAL OF PATHOLOGY 2004; 165:855-67. [PMID: 15331410 PMCID: PMC1618601 DOI: 10.1016/s0002-9440(10)63348-2] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Wnt-1-induced secreted protein 1 (WISP-1) is a member of the CCN (connective tissue growth factor, Cyr61, NOV) family of growth factors. Experimental evidence suggests that CCN family members are involved in skeletogenesis and bone healing. To investigate the role of WISP-1 in osteogenic processes, we characterized its tissue and cellular expression and evaluated its activity in osteoblastic and chondrocytic cell culture models. During embryonic development, WISP-1 expression was restricted to osteoblasts and to osteoblastic progenitor cells of the perichondral mesenchyme. In vitro, we showed that WISP-1 expression in differentiating osteoblasts promotes BMP-2-induced osteoblastic differentiation. Using in situ and cell binding analysis, we demonstrated WISP-1 interaction with perichondral mesenchyme and undifferentiated chondrocytes. We evaluated the effect of WISP-1 on chondrocytes by generating stably transfected mouse chondrocytic cell lines. In these cells, WISP-1 increased proliferation and saturation density but repressed chondrocytic differentiation. Because of the similarity between skeletogenesis and bone healing, we also analyzed WISP-1 spatiotemporal expression in a fracture repair model. We found that WISP-1 expression recapitulates the pattern observed during skeletal development. Our data demonstrate that WISP-1 is an osteogenic potentiating factor promoting mesenchymal cell proliferation and osteoblastic differentiation while repressing chondrocytic differentiation. Therefore, we propose that WISP-1 plays an important regulatory role during bone development and fracture repair.
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Affiliation(s)
- Dorothy M French
- Department of Pathology, Genentech Incorporated, South San Francisco, California, USA
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Sen M, Cheng YH, Goldring MB, Lotz MK, Carson DA. WISP3-dependent regulation of type II collagen and aggrecan production in chondrocytes. ACTA ACUST UNITED AC 2004; 50:488-97. [PMID: 14872491 DOI: 10.1002/art.20005] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE WISP3 (Wnt-1-inducible secreted protein 3) is a member of the CCN (connective tissue growth factor, cysteine-rich 61, nephroblastoma overexpressed) family of connective tissue growth factors. WISP3 mutations have been linked to progressive pseudorheumatoid dysplasia (PPRD). The present study was conducted to investigate whether WISP3 is responsible for the expression of cartilage-specific molecules. METHODS WISP3 expression in human cartilage was assessed by immunostaining with anti-WISP3 antibody. The effect of WISP3 on chondrocyte-specific gene regulation was determined by transfecting human chondrocyte lines C-28/I2 and T/C-28a2 with a WISP3 expression vector. Alterations in WISP3-mediated messenger RNA and protein expression of cartilage-specific molecules were assessed by reverse transcriptase-polymerase chain reaction and immunoblotting. RESULTS Immunohistochemistry experiments demonstrated that WISP3 protein is expressed in the midzone chondrocytes of normal adult articular cartilage, in chondrocyte clusters of osteoarthritic cartilage, and in the zone of proliferating chondrocytes of fetal growth cartilage. Human chondrocyte lines C-28/I2 and T/C-28a2 transfected with a WISP3 expression vector produced increased amounts of the cartilage-specific matrix molecules type II collagen and aggrecan, in part via activation of the sex-determining region Y-type high mobility group box (SOX) family of transcription factors. In contrast, a mutant WISP3, previously found to be associated with PPRD, had impaired effects on cartilage-specific gene expression. CONCLUSION Our experimental results suggest that WISP3 supports cartilage integrity by regulating the expression of type II collagen and aggrecan, and mutations linked with PPRD can compromise this function and produce cartilage loss.
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Affiliation(s)
- Malini Sen
- University of California, San Diego, CA 92093-0663, USA.
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Fukunaga T, Yamashiro T, Oya S, Takeshita N, Takigawa M, Takano-Yamamoto T. Connective tissue growth factor mRNA expression pattern in cartilages is associated with their type I collagen expression. Bone 2003; 33:911-8. [PMID: 14678850 DOI: 10.1016/j.bone.2003.07.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Connective tissue growth factor (CTGF) has been identified as a secretory protein encoded by an immediate early gene and is a member of the CCN family. In vitro CTGF directly regulates the proliferation and differentiation of chondrocytes; however, a previous study showed that it was localized only in the hypertrophic chondrocytes in the costal cartilages of E 18 mouse embryos. We described the expression of CTGF mRNA and protein in chondrocytes of different types of cartilages, including femoral growth plate cartilage, costal cartilage, femoral articular cartilage, mandibular condylar cartilage, and cartilage formed during the healing of mandibular ramus fractures revealed by in situ hybridization and immunohistochemistry. To characterize the CTGF-expressing cells, we also analyzed the distribution of the type I, type II, and type X collagen mRNA expression. Among these different types of cartilages we found distinct patterns of CTGF mRNA and protein expression. Growth plate cartilage and the costal cartilage showed localization of CTGF mRNA and protein in the hypertrophic chondrocytes that expressed type X collagen mRNA with less expression in proliferating chondrocytes that expressed type II collagen mRNA, whereas it was also expressed in the proliferating chondrocytes that expressed type I collagen mRNA in the condylar cartilage, the articular cartilage, and the cartilage appearing during fracture healing. In contrast, the growth plate cartilages or the costal cartilages were negative for type I collagen and showed sparse expression of CTGF mRNA in the proliferating chondrocytes. We found for the first time that CTGF mRNA could be differentially expressed in five different types of cartilage associated with those expressing type I collagen. Moreover, the spatial distribution of CTGF mRNA in the cartilages with type I collagen mRNA suggested its roles in the early differentiation, as well as in the proliferation and the terminal differentiation, of those cartilages.
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Affiliation(s)
- Tomohiro Fukunaga
- Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan
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Kanyama M, Kuboki T, Akiyama K, Nawachi K, Miyauchi FM, Yatani H, Kubota S, Nakanishi T, Takigawa M. Connective tissue growth factor expressed in rat alveolar bone regeneration sites after tooth extraction. Arch Oral Biol 2003; 48:723-30. [PMID: 12971950 DOI: 10.1016/s0003-9969(03)00153-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To understand bone regeneration process after tooth extraction could be a clue to develop a new strategy for alveolar bone reconstruction. Recently, accumulated evidences support that connective tissue growth factor (CTGF) is implicated in tissue repair of many tissues. In this study, we investigated the spatial and temporal expression of CTGF in the rat tooth extraction sockets. DESIGN Five weeks old wild type male rats (weighing 120 g) were used for this experiment. Expression of CTGF was determined by immunohistochemistry and in situ hybridization in the rat upper molar tooth extraction sockets at 2, 4, 7, 10 and 14 days after tooth extraction. RESULTS CTGF was expressed strongly in the endothelial cells migrating into the granulation tissue at the bottom of the sockets during 4 days after tooth extraction. During the reparative process, no apparent chondrocyte-like cell appeared in the sockets, while osteoblast-like cells proliferated in the sockets with low CTGF expression at 7, 10, 14 days after extraction. As expected, no staining was observed with the preimmune rabbit IgG and CTGF sense probe. CTGF may play an important role in angiogenesis and granulation tissue formation specifically at early healing stage after tooth extraction to initiate alveolar bone repair. CONCLUSION CTGF was expressed at early healing stage of the rat tooth extraction wound.
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Affiliation(s)
- Manabu Kanyama
- Department of Oral and Maxillofacial Rehabilitation, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan
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Safadi FF, Xu J, Smock SL, Kanaan RA, Selim AH, Odgren PR, Marks SC, Owen TA, Popoff SN. Expression of connective tissue growth factor in bone: its role in osteoblast proliferation and differentiation in vitro and bone formation in vivo. J Cell Physiol 2003; 196:51-62. [PMID: 12767040 DOI: 10.1002/jcp.10319] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Connective tissue growth factor (CTGF) is a secreted, extracellular matrix-associated signaling protein that regulates diverse cellular functions. In vivo, CTGF is expressed in many tissues with highest levels in the kidney and brain. The purpose of this study was twofold; first, to localize CTGF in normal bone in vivo during growth and repair, and second, to examine CTGF expression and function in primary osteoblast cultures in vitro and test its effect on bone formation in vivo. Northern and Western blot analyses confirmed that CTGF is expressed in normal long bones during the period of growth or modeling. In situ hybridization and immunohistochemical analysis demonstrated intense staining for CTGF mRNA and protein in osteoblasts lining metaphyseal trabeculae. Examination of CTGF expression in the fracture callus demonstrated that it was primarily localized in osteoblasts lining active, osteogenic surfaces. In primary osteoblast cultures, CTGF mRNA levels demonstrated a bimodal pattern of expression, being high during the peak of the proliferative period, abating as the cells became confluent, and increasing to peak levels and remaining high during mineralization. This pattern suggests that CTGF may play a role in osteoblast proliferation and differentiation as previously demonstrated for fibroblasts and chondrocytes. Treatment of primary osteoblast cultures with anti-CTGF neutralizing antibody caused a dose-dependent inhibition of nodule formation and mineralization. Treatment of primary osteoblast cultures with recombinant CTGF (rCTGF) caused an increase in cell proliferation, alkaline phosphatase activity, and calcium deposition, thereby establishing a functional connection between CTGF and osteoblast differentiation. In vivo delivery of rCTGF into the femoral marrow cavity induced osteogenesis that was associated with increased angiogenesis. This study clearly shows that CTGF is important for osteoblast development and function both in vitro and in vivo.
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Affiliation(s)
- Fayez F Safadi
- Department of Anatomy and Cell Biology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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