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Tateiwa D, Iwamoto M, Kodama J, Ukon Y, Hirai H, Ikuta M, Kitahara T, Furuichi T, Bun M, Otsuru S, Okada S, Kaito T. A synthetic retinoic acid receptor γ antagonist (7C)-loaded nanoparticle enhances bone morphogenetic protein-induced bone regeneration in a rat spinal fusion model. Spine J 2024; 24:899-908. [PMID: 38092193 DOI: 10.1016/j.spinee.2023.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 10/19/2023] [Accepted: 11/27/2023] [Indexed: 12/25/2023]
Abstract
BACKGROUND CONTEXT Bone morphogenetic proteins (BMPs) have potent osteoinductivity and have been applied clinically for challenging musculoskeletal conditions. However, the supraphysiological doses of BMPs used in clinical settings cause various side effects that prevent widespread use, and therefore the BMP dosage needs to be reduced. PURPOSE To address this problem, we synthesized 7C, a retinoic acid receptor γ antagonist-loaded nanoparticle (NP), and investigated its potential application in BMP-based bone regeneration therapy using a rat spinal fusion model. STUDY DESIGN An experimental animal study. METHODS Fifty-three male 8-week-old Sprague-Dawley rats underwent posterolateral spinal fusion and were divided into the following five treatment groups: (1) no recombinant human (rh)BMP-2 and blank-NP (Control), (2) no rhBMP-2 and 1 μg 7C-NP (7C group), (3) low-dose rhBMP-2 (0.5 μg) and 1 μg blank-NP (L-BMP group), (4) low-dose rhBMP-2 (0.5 μg) and 1 μg 7C-NP (L-BMP + 7C group), and (5) high-dose rhBMP-2 (5.0 μg) and 1 μg blank-NP (H-BMP group). Micro-computed tomography and histologic analysis were performed 2 and 6 weeks after the surgery. RESULTS The spinal fusion rates of the Control and 7C groups were both 0%, and those of the L-BMP, L-BMP + 7C, and H-BMP groups were 55.6%, 94.4%, and 100%, respectively. The L-BMP + 7C group markedly promoted cartilaginous tissue formation during BMP-induced endochondral bone formation that resulted in a significantly better spinal fusion rate and bone formation than in the L-BMP group. Although spinal fusion was slower in the L-BMP + 7C group, the L-BMP + 7C group formed a spinal fusion mass with better bone quality than the spinal fusion mass in the H-BMP group. CONCLUSIONS The combined use of 7C-NP with rhBMP-2 in a rat posterolateral lumbar fusion model increased spinal fusion rate and new bone volume without deteriorating the quality of newly formed bone. CLINICAL SIGNIFICANCE 7C-NP potentiates BMP-2-induced bone regeneration and has the potential for efficient bone regeneration with low-dose BMP-2, which can reduce the dose-dependent side effects of BMP-2 in clinical settings.
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Affiliation(s)
- Daisuke Tateiwa
- Department of Orthopaedic Surgery, Osaka General Medical Center, 3-1-56, Mandaihigashi, Sumiyoshi, Osaka, Japan
| | - Masahiro Iwamoto
- Department of Orthopaedic, University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD, USA
| | - Joe Kodama
- Department of Orthopaedic, University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD, USA
| | - Yuichiro Ukon
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiromasa Hirai
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Masato Ikuta
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takayuki Kitahara
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takuya Furuichi
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Masayuki Bun
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoru Otsuru
- Department of Orthopaedic, University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD, USA
| | - Seiji Okada
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Kaito
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Posa F, Grab AL, Martin V, Hose D, Seckinger A, Mori G, Vukicevic S, Cavalcanti-Adam EA. Copresentation of BMP-6 and RGD Ligands Enhances Cell Adhesion and BMP-Mediated Signaling. Cells 2019; 8:E1646. [PMID: 31847477 PMCID: PMC6953040 DOI: 10.3390/cells8121646] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/09/2019] [Accepted: 12/13/2019] [Indexed: 12/16/2022] Open
Abstract
We report on the covalent immobilization of bone morphogenetic protein 6 (BMP-6) and its co-presentation with integrin ligands on a nanopatterned platform to study cell adhesion and signaling responses which regulate the transdifferentiation of myoblasts into osteogenic cells. To immobilize BMP-6, the heterobifunctional linker MU-NHS is coupled to amine residues of the growth factor; this prevents its internalization while ensuring that its biological activity is maintained. Additionally, to allow cells to adhere to such platform and study signaling events arising from the contact to the surface, we used click-chemistry to immobilize cyclic-RGD carrying an azido group reacting with PEG-alkyne spacers via copper-catalyzed 1,3-dipolar cycloaddition. We show that the copresentation of BMP-6 and RGD favors focal adhesion formation and promotes Smad 1/5/8 phosphorylation. When presented in low amounts, BMP-6 added to culture media of cells adhering to the RGD ligands is less effective than BMP-6 immobilized on the surfaces in inducing Smad complex activation and in inhibiting myotube formation. Our results suggest that a local control of ligand density and cell signaling is crucial for modulating cell response.
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Affiliation(s)
- Francesca Posa
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstr. 29, 69120 Heidelberg, Germany
- Department of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
- Department of Clinical and Experimental Medicine, University of Foggia, via L. Pinto, 71122 Foggia, Italy
| | - Anna Luise Grab
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstr. 29, 69120 Heidelberg, Germany
- Department of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
- Genome Biology Unit, EMBL, Meyerhofstraße 1, 69117 Heidelberg, Germany
| | - Volker Martin
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstr. 29, 69120 Heidelberg, Germany
- Department of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Dirk Hose
- Laboratory for Myeloma Research and Medical Clinic V, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Anja Seckinger
- Laboratory for Myeloma Research and Medical Clinic V, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Giorgio Mori
- Department of Clinical and Experimental Medicine, University of Foggia, via L. Pinto, 71122 Foggia, Italy
| | - Slobodan Vukicevic
- Laboratory for Mineralized Tissues, Center for Translational and Clinical Research, School of Medicine, University of Zagreb, Šalata 11, 10000 Zagreb, Croatia
| | - Elisabetta Ada Cavalcanti-Adam
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Jahnstr. 29, 69120 Heidelberg, Germany
- Department of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
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Grab AL, Seckinger A, Horn P, Hose D, Cavalcanti-Adam EA. Hyaluronan hydrogels delivering BMP-6 for local targeting of malignant plasma cells and osteogenic differentiation of mesenchymal stromal cells. Acta Biomater 2019; 96:258-270. [PMID: 31302300 DOI: 10.1016/j.actbio.2019.07.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 07/08/2019] [Accepted: 07/10/2019] [Indexed: 12/15/2022]
Abstract
Multiple myeloma is a malignant disease characterized by accumulation of clonal plasma cells in the bone marrow. Uncoupling of bone formation and resorption by myeloma cells leads to osteolytic lesions. These are prone to fracture and represent a possible survival space for myeloma cells under treatment causing disease relapse. Here we report on a novel approach suitable for local treatment of multiple myeloma based on hyaluronic acid (HA) hydrogels mimicking the physical properties of the bone marrow. The HA hydrogels are complexed with heparin to achieve sustained presentation and controlled release of bone morphogenetic protein 6 (BMP-6). Others and we have shown that BMP-6 induces myeloma cell apoptosis and bone formation. Using quartz crystal microbalance and enzyme-linked immunosorbent assay, we measured an initial surface density of 400 ng BMP6/cm2, corresponding to two BMP-6 per heparin molecule, with 50% release within two weeks. HA-hydrogels presenting BMP-6 enhanced the phosphorylation of Smad 1/5 while reducing the activity of BMP-6 antagonist sclerostin. These materials induced osteogenic differentiation of mesenchymal stromal cells and decreased the viability of myeloma cell lines and primary myeloma cells. BMP-6 functionalized HA-hydrogels represent a promising material for local treatment of myeloma-induced bone disease and residual myeloma cells within lesions to minimize disease relapse or fractures. STATEMENT OF SIGNIFICANCE: Multiple myeloma is a hematological cancer characterized by the accumulation of clonal plasma cells in the bone marrow and local suppression of bone formation, resulting in osteolytic lesions and fractures. Despite recent advances in systemic treatment of multiple myeloma, it is rare to achieve a targeted suppression of myeloma cells and healing of bone lesions. Here we present hydrogels which mimic the physico-chemical properties of the bone marrow, consisting of hyaluronic acid with crosslinked heparin for the controlled presentation of bioactive BMP-6. The hydrogels decrease the viability of myeloma cell lines and primary myeloma cells and induces osteogenic differentiation of mesenchymal stromal cells. The presentation of BMP-6 in the hyaluronan hydrogels enhances the phosphorylation of Smad1/5 while reducing the activity of the BMP-6 antagonist sclerostin. As such, BMP-6 functionalized hyaluronan hydrogels represent a promising material for the localized eradication of myeloma cells.
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Affiliation(s)
- Anna Luise Grab
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; Institute of Physical Chemistry, Department of Biophysical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany; Max Planck Institute for Medical Research, Department of Cellular Biophysics and Central Scientific Facility "Cellular Biotechnology", Jahnstr. 29, 69120 Heidelberg, Germany
| | - Anja Seckinger
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Patrick Horn
- Medizinische Klinik V, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 350, 69120 Heidelberg, Germany
| | - Dirk Hose
- Labor für Myelomforschung, Medizinische Klinik V, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
| | - Elisabetta Ada Cavalcanti-Adam
- Institute of Physical Chemistry, Department of Biophysical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany; Max Planck Institute for Medical Research, Department of Cellular Biophysics and Central Scientific Facility "Cellular Biotechnology", Jahnstr. 29, 69120 Heidelberg, Germany.
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Xiao J, Cao P, Wang C, Huang D, Lian M, Song Y, Yin W, Zheng K, Gu Z, Gu Y, Feng G, Feng X. The Forkhead Box C1, a Novel Negative Regulator of Osteogenesis, Plays a Crucial Role in Odontogenic Differentiation of Dental Pulp Stem Cells. Cell Reprogram 2019; 20:312-319. [PMID: 30277823 DOI: 10.1089/cell.2018.0011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The forkhead box C1 (Foxc1) protein, a member of the forkhead/winged helix transcription factor family, is required in stem cell developmental processes. Recently, multiple studies have indicated the crucial role of Foxc1 in mesenchymal stem cell differentiation, but the precise effects and mechanisms on dental pulp stem cells (DPSCs) remain unclear. In this study, we evaluate the role of Foxc1 on the odontogenic differentiation and proliferation of DPSCs. Our results show that Foxc1 decreases time dependently in odontogenic differentiation of DPSCs. Meanwhile, overexpression of Foxc1 could significantly inhibit the mineralization of DPSCs and the expression of odontogenic-related genes, such as runt-related transcription factor 2 (Runx2), dentin sialophosphoprote (DSPP), and dentin matrix acidic phosphoprotein 1 (DMP-1). Foxc1 overexpression does not significantly alter the proliferation of DPSCs. In addition, Foxc1 reduces the expression of p-Smad1/5, an important modulator of bone morphogenetic protein (BMP)/Smad signaling pathway, inhibiting BMP/Smad signaling pathway. In conclusion, our data demonstrated that Foxc1 inhibits odontogenic differentiation of DPSCs and odontogenic-related gene expression through the BMP/Smad signaling pathway which may be useful for the dental regeneration and repair.
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Affiliation(s)
- Jingwen Xiao
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Peipei Cao
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Chenfei Wang
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Dan Huang
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Min Lian
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Yihua Song
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Weiwei Yin
- 2 Department of Stomatology, Stomatological Hospital of Nantong City , Nantong, Jiangsu, China
| | - Ke Zheng
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Zhifeng Gu
- 3 Department of Rheumatology, Affiliated Hospital of Nantong University , Nantong, Jiangsu, China
| | - Yongchun Gu
- 4 Department of Stomatology, First People's Hospital of Wujiang District, Nantong University , Suzhou, Jiangsu, China
| | - Guijuan Feng
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
| | - Xingmei Feng
- 1 Department of Stomatology, Affiliated Hospital of Nantong University, Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University , Nantong, Jiangsu, China
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Woo SM, Kim WJ, Lim HS, Choi NK, Kim SH, Kim SM, Jung JY. Combination of Mineral Trioxide Aggregate and Platelet-rich Fibrin Promotes the Odontoblastic Differentiation and Mineralization of Human Dental Pulp Cells via BMP/Smad Signaling Pathway. J Endod 2015; 42:82-8. [PMID: 26364004 DOI: 10.1016/j.joen.2015.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 06/17/2015] [Accepted: 06/25/2015] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Recent reports have shown that the combined use of platelet-rich fibrin (PRF), an autologous fibrin matrix, and mineral trioxide aggregate (MTA) as root filling material is beneficial for the endodontic management of an open apex. However, the potential of the combination of MTA and PRF as an odontogenic inducer in human dental pulp cells (HDPCs) in vitro has not yet been studied. The purpose of this study was to evaluate the effect of the combination of MTA and PRF on odontoblastic maturation in HDPCs. METHODS HDPCs extracted from third molars were directly cultured with MTA and PRF extract (PRFe). Odontoblastic differentiation of HDPCs was evaluated by measuring the alkaline phosphatase (ALP) activity, and the expression of odontogenesis-related genes was detected using reverse-transcription polymerase chain reaction or Western blot. Mineralization formation was assessed by alizarin red staining. RESULTS HDPCs treated with MTA and PRFe significantly up-regulated the expression of dentin sialoprotein and dentin matrix protein-1 and enhanced ALP activity and mineralization compared with those with MTA or PRFe treatment alone. In addition, the combination of MTA and PRFe induced the activation of bone morphogenic proteins (BMP)/Smad, whereas LDN193189, the bone morphogenic protein inhibitor, attenuated dentin sialophosphoprotein and dentin matrix protein-1 expression, ALP activity, and mineralization enhanced by MTA and PRFe treatment. CONCLUSIONS This study shows that the combination of MTA and PRF has a synergistic effect on the stimulation of odontoblastic differentiation of HDPCs via the modulation of the BMP/Smad signaling pathway.
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Affiliation(s)
- Su-Mi Woo
- Department of Oral Physiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea; Research Center for Biomineralization Disorder, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Won-Jae Kim
- Department of Oral Physiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea; Research Center for Biomineralization Disorder, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Hae-Soon Lim
- Department of Dental Education, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Nam-Ki Choi
- Department of Pediatric Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Sun-Hun Kim
- Research Center for Biomineralization Disorder, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea; Department of Oral Anatomy, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Seon-Mi Kim
- Department of Pediatric Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea.
| | - Ji-Yeon Jung
- Department of Oral Physiology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea.
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Hauff K, Zambarda C, Dietrich M, Halbig M, Grab AL, Medda R, Cavalcanti-Adam EA. Matrix-Immobilized BMP-2 on Microcontact Printed Fibronectin as an in vitro Tool to Study BMP-Mediated Signaling and Cell Migration. Front Bioeng Biotechnol 2015; 3:62. [PMID: 26029690 PMCID: PMC4426815 DOI: 10.3389/fbioe.2015.00062] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/20/2015] [Indexed: 12/31/2022] Open
Abstract
During development, growth factors (GFs) such as bone morphogenetic proteins (BMPs) exert important functions in several tissues by regulating signaling for cell differentiation and migration. In vivo, the extracellular matrix (ECM) not only provides support for adherent cells, but also acts as reservoir of GFs. Several constituents of the ECM provide adhesive cues, which serve as binding sites for cell trans-membrane receptors, such as integrins. In conveying adhesion-mediated signaling to the intracellular compartment, integrins do not function alone but rather crosstalk and cooperate with other receptors, such as GF receptors. Here, we present a strategy for the immobilization of BMP-2 onto cellular fibronectin (cFN), a key protein of the ECM, to investigate GF-mediated signaling and migration. Following biotinylation, BMP-2 was linked to biotinylated cFN using NeutrAvidin as cross-linker. Characterization with quartz crystal microbalance with dissipation monitoring and enzyme-linked immunosorbent assay confirmed the efficient immobilization of BMP-2 on cFN over a period of 24 h. To validate the bioactivity of matrix-immobilized BMP-2 (iBMP-2), we investigated short- and long-term responses of C2C12 myoblasts, which are an established in vitro model for BMP-2 signaling, in comparison to soluble BMP-2 (sBMP-2) or in absence of GFs. Similarly to sBMP-2, iBMP-2 triggered Smad 1/5 phosphorylation and translocation of the complex to the nucleus, corresponding to the activation of BMP-mediated Smad-dependent pathway. Additionally, successful suppression of myotube formation was observed after 6 days in sBMP-2 and iBMP-2. We next implemented this approach in the fabrication of cFN micropatterned stripes by soft lithography. These stripes allowed cell-surface interaction only on the patterned cFN, since the surface in between was passivated, thus serving as platform for studies on directed cell migration. During a 10-h observation time, the migratory behavior, especially the cells' net displacement, was increased in presence of BMP-2. As such, this versatile tool retains the bioactivity of GFs and allows the presentation of ECM adhesive cues.
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Affiliation(s)
- Kristin Hauff
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Applied Chemistry, University of Reutlingen , Reutlingen , Germany
| | - Chiara Zambarda
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Miriam Dietrich
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany
| | - Maria Halbig
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Anna Luise Grab
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany
| | - Rebecca Medda
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
| | - Elisabetta Ada Cavalcanti-Adam
- Department of Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg , Heidelberg , Germany ; Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems , Stuttgart , Germany
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Wang JH, Liu YZ, Yin LJ, Chen L, Huang J, Liu Y, Zhang RX, Zhou LY, Yang QJ, Luo JY, Zuo GW, Deng ZL, He BC. BMP9 and COX-2 form an important regulatory loop in BMP9-induced osteogenic differentiation of mesenchymal stem cells. Bone 2013; 57:311-21. [PMID: 23981660 DOI: 10.1016/j.bone.2013.08.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/03/2013] [Accepted: 08/13/2013] [Indexed: 01/11/2023]
Abstract
Mesenchymal stem cells (MSCs) can self-renew and differentiate into osteogenic, chondrogenic, adipogenic and myogenic lineages. It's reported that bone morphogenetic protein 9 (BMP9) is one of the most potent osteogenic BMPs to initiate the commitment of MSCs to osteoblast lineage. Cyclooxygenase-2 (COX-2) is critical for bone fracture healing and osteogenic differentiation in MSCs. However, the relationship between COX-2 and BMP9 in osteogenesis remains unknown. Herein, we investigate the role of COX-2 in BMP9-induced osteogenesis in MSCs. We demonstrate that COX-2 is up-regulated as a target of BMP9 in MSCs. Both COX-2 inhibitor (NS-398) and COX-2 knockdown siRNAs can effectively decrease alkaline phosphatase (ALP) activities induced by BMP9 in MSCs. NS-398 also down-regulates BMP9-induced expression of osteopontin and osteocalcin, so does the matrix mineralization. The in vivo studies indicate that knockdown of COX-2 attenuates BMP9-induced ectopic bone formation. In perinatal limb culture assay, NS-398 is shown to reduce the hypertropic chondrocyte zone and ossification induced by BMP9. Mechanistically, knockdown of COX-2 significantly inhibits the BMP9 up-regulated expression of Runx2 and Dlx-5 in MSCs, which can be rescued by exogenous expression of COX-2. Furthermore, knockdown of COX-2 apparently reduces BMP9 induced BMPR-Smad reporter activity, the phosphorylation of Smad1/5/8, and the expression of Smad6 and Smad7 in MSCs. NS-398 blocks the expression of BMP9 mediated by BMP9 recombinant adenovirus. Taken together, our findings suggest that COX-2 plays an important role in BMP9 induced osteogenic differentiation in MSCs; BMP9 and COX-2 may form an important regulatory loop to orchestrate the osteogenic differentiation in MSCs.
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Affiliation(s)
- Jin-Hua Wang
- Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, People's Republic of China; The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, People's Republic of China
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