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Kamatsuki Y, Aoyama E, Furumatsu T, Ozaki T, Takigawa M. The Evaluation of Meniscus Regenerative Effects of LIPUS-Induced CCN Proteins: Induction by LIPUS of CCN2 and Meniscus-Related Genes in Cultured Meniscus Cells and Meniscus Tissues. Methods Mol Biol 2023; 2582:223-235. [PMID: 36370353 DOI: 10.1007/978-1-0716-2744-0_15] [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
Menisci are a pair of crescent-shaped fibrocartilages and composed primarily of type I collagen. Inner region of the meniscus has similar characteristics to articular cartilage. Low-intensity pulsed ultrasound (LIPUS) has been reported to have chondroprotective effects on chondrocytes by inducing the expression of chondrocyte differentiation markers and CCN2/CTGF production. Here, we describe an experimental approach that investigates the distinct cellular behavior of human inner and outer meniscus cells in response to LIPUS stimulation. Our experimental model can analyze the relationships between LIPUS-induced CCN2 and its repairing role in the meniscus.
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Affiliation(s)
- Yusuke Kamatsuki
- Department of Orthopedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan
- Advanced Research Center for Oral and Craniofacial Sciences (ARCOCS), Okayama University Dental School/Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan
| | - Eriko Aoyama
- Advanced Research Center for Oral and Craniofacial Sciences (ARCOCS), Okayama University Dental School/Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan
| | - Takayuki Furumatsu
- Department of Orthopedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan
| | - Toshifumi Ozaki
- Department of Orthopedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan
| | - Masaharu Takigawa
- Advanced Research Center for Oral and Craniofacial Sciences (ARCOCS), Okayama University Dental School/Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Kitaku, Okayama, Japan.
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Zhang X, Furumatsu T, Okazaki Y, Hiranaka T, Xue H, Kintaka K, Miyazawa S, Ozaki T. Comparison of posterior root remnant cells and horn cells of the medial meniscus. Connect Tissue Res 2022; 63:309-318. [PMID: 33974473 DOI: 10.1080/03008207.2021.1920935] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE/AIM OF THE STUDY Previous studies have noted distinctions between medial meniscus posterior root and horn cells. However, the characteristics of root remnant cells have not been explored in detail. The purpose of this study was to evaluate the gene expression levels, proliferation, and resistance to mechanical stress of remnant and horn cells. MATERIALS AND METHODS Medial meniscus tissue samples were obtained from patients who underwent total or uni-compartmental knee arthroplasty. Cellular morphology, sry-type HMG box 9, type II collagen, and chondromodulin-I gene expression levels were analyzed. Collagen synthesis was assessed by immunofluorescence staining. Proliferation analysis after 4 h-cyclic tensile strain was performed. RESULTS Horn cells displayed triangular morphology, whereas root remnant cells appeared fibroblast-like. sry-type HMG box 9 mRNA expression levels were similar in both cells, but type II collagen and chondromodulin-I mRNA expressions were observed only in horn cells. The ratio of type II collagen-positive cells in horn cells was about 10-fold higher than that in root remnant cells, whereas the ratio of sry-type HMG box 9-positive cells was similar. A significant increase in proliferation was observed in root remnant cells compared to that in horn cells. Further, under cyclic tensile strain, the survival rate was higher in root remnant cells than in horn cells. CONCLUSIONS Medial meniscus root remnant cells showed higher proliferation and resistant properties to cyclic tensile strain than horn cells and showed no chondromodulin-I expression. Preserving the medial meniscus posterior root remnant during pullout repair surgery might maintain mechanical stress-resistant tissue and support healing.
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Affiliation(s)
- Ximing Zhang
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Haowei Xue
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Keisuke Kintaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shinichi Miyazawa
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Prospective Application of Partially Digested Autologous Chondrocyte for Meniscus Tissue Engineering. Pharmaceutics 2022; 14:pharmaceutics14030605. [PMID: 35335980 PMCID: PMC8952194 DOI: 10.3390/pharmaceutics14030605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 01/10/2023] Open
Abstract
Background: Meniscus tissue engineering has yet to achieve clinical application because it requires chondrogenic induction and in vitro cell expansion. Contrarily, cartilage engineering from autologous chondrocytes has been successfully applied in one-stage surgery. If the natural chondrogenic potential of meniscus cells can be demonstrated, meniscus tissue engineering would have more value in clinical settings. Materials and Methods: In total, 10 menisci and pieces of cartilage were obtained during total knee replacements. The tissues were collected for cell isolation and expansion. Their chondrogenic properties were examined by immunohistofluorescence and gene expression analyses. Results: In native cartilage, immunofluorescence demonstrated the presence of collagen I, aggrecan, and traces of collagen I, whereas comparable staining was seen in the inner and middle meniscus. The presence of collagen I but the absence of collagen II and aggrecan were observed in the outer meniscus. In passage 2, chondrocytes showed the presence of collagen II and aggrecan, and the absence of vimentin. The vimentin and aggrecan staining were comparable in the inner and middle meniscus cells, whereas the outer cells showed only vimentin staining. In the gene expression analyses, the expressions of collagen II and aggrecan in the native chondrocyte and the inner and middle meniscus were higher than those of the cells from the outer meniscus, but they were not different in collagen I. In the passage 2 culture, chondrocytes had a higher expression of collagen II and aggrecan than the meniscus cells. Cells from the inner and middle areas had higher collagen II and aggrecan expression than those from the outer meniscus. Conclusion: Without chondrogenic induction, inner and middle meniscus cells possess a chondrogenic phenotype. Specifically, native meniscus cells exhibited more robust chondrogenic potential compared with those of the passage 2 monolayer culture.
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Wu J, Xu J, Huang Y, Tang L, Hong Y. Regional-specific meniscal extracellular matrix hydrogels and their effects on cell-matrix interactions of fibrochondrocytes. Biomed Mater 2021; 17. [PMID: 34883474 DOI: 10.1088/1748-605x/ac4178] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/09/2021] [Indexed: 02/07/2023]
Abstract
Decellularized meniscal extracellular matrix (ECM) material holds great potential for meniscus repair and regeneration. Particularly, injectable ECM hydrogel is highly desirable for the minimally invasive treatment of irregularly shaped defects. Although regional-specific variations of the meniscus are well documented, no ECM hydrogel has been reported to simulate zonally specific microenvironments of the native meniscus. To fill the gap, different (outer, middle, and inner) zones of porcine menisci were separately decellularized. Then the regionally decellularized meniscal ECMs were solubilized by pepsin digestion, neutralized, and then form injectable hydrogels. The hydrogels were characterized in gelation behaviors and mechanical properties and seeded with bovine fibrochondrocytes to evaluate the regionally biochemical effects on the cell-matrix interactions. Our results showed that the decellularized inner meniscal ECM (IM) contained the greatest glycosaminoglycan (GAG) content and the least collagen content compared with the decellularized outer meniscal ECM (OM) and middle meniscal ECM (MM). The IM hydrogel showed lower compressive strength than the OM hydrogel. When encapsulated with fibrochondrocytes, the IM hydrogel accumulated more GAG, contracted to a greater extent and reached higher compressive strength than that of the OM hydrogel at 28 days. Our findings demonstrate that the regionally specific meniscal ECMs present biochemical variation and show various effects on the cell behaviors, thus providing information on how meniscal ECM hydrogels may be utilized to reconstruct the microenvironments of the native meniscus.
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Affiliation(s)
- Jinglei Wu
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Jiazhu Xu
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Yihui Huang
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Liping Tang
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, United States of America
| | - Yi Hong
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, United States of America
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Klarmann GJ, Gaston J, Ho VB. A review of strategies for development of tissue engineered meniscal implants. BIOMATERIALS AND BIOSYSTEMS 2021; 4:100026. [PMID: 36824574 PMCID: PMC9934480 DOI: 10.1016/j.bbiosy.2021.100026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/17/2021] [Accepted: 08/25/2021] [Indexed: 12/09/2022] Open
Abstract
The meniscus is a key stabilizing tissue of the knee that facilitates proper tracking and movement of the knee joint and absorbs stresses related to physical activity. This review article describes the biology, structure, and functions of the human knee meniscus, common tears and repair approaches, and current research and development approaches using modern methods to fabricate a scaffold or tissue engineered meniscal replacement. Meniscal tears are quite common, often resulting from sports or physical training, though injury can result without specific contact during normal physical activity such as bending or squatting. Meniscal injuries often require surgical intervention to repair, restore basic functionality and relieve pain, and severe damage may warrant reconstruction using allograft transplants or commercial implant devices. Ongoing research is attempting to develop alternative scaffold and tissue engineered devices using modern fabrication techniques including three-dimensional (3D) printing which can fabricate a patient-specific meniscus replacement. An ideal meniscal substitute should have mechanical properties that are close to that of natural human meniscus, and also be easily adapted for surgical procedures and fixation. A better understanding of the organization and structure of the meniscus as well as its potential points of failure will lead to improved design approaches to generate a suitable and functional replacement.
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Affiliation(s)
- George J. Klarmann
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA,The Geneva Foundation, 917 Pacific Ave., Tacoma, WA 98402, USA,Corresponding author at: USU-4D Bio³ Center, 9410 Key West Ave., Rockville, MD 20850, USA.
| | - Joel Gaston
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA,The Geneva Foundation, 917 Pacific Ave., Tacoma, WA 98402, USA
| | - Vincent B. Ho
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
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Aydın N, Karaismailoğlu B, Alaylıoğlu M, Gezen-Ak D, Şengül B, Candaş E, Yılmazer S, Dursun E. Gene expression profiling of primary fibrochondrocyte cultures in traumatic and degenerative meniscus lesions. J Orthop Surg (Hong Kong) 2021; 29:23094990211000168. [PMID: 33729061 DOI: 10.1177/23094990211000168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
PURPOSE This study aimed to investigate how fibroblastic and chondrocytic properties of human meniscal fibrochondrocytes are affected in culture conditions according to the type of meniscal pathology and localization, and to provide basic information for tissue-engineering studies. METHODS Primary fibrochondrocyte cultures were prepared from meniscus samples of patients who had either traumatic tear or degeneration due to osteoarthritis. Cultures were compared in terms of mRNA expression levels of COL1A1, COL2A1, COMP1, HIF1A, HIF2A, and SOX9 and secreted total collagen and sulfated sGAG levels according to the type of meniscal pathology, anatomical localization, and the number of subcultures. RESULTS mRNA expression levels of COL1A1, COMP1, HIF1A, HIF2A, and SOX9 were found to be increased in subsequent subcultures in all specimens. COL1A1 mRNA expression levels of both lateral and medial menisci of patients with traumatic tear were significantly higher than in patients with degenerative pathology, indicating a more fibroblastic character. P1 subculture of lateral and P3 or further subculture of medial meniscus showed more fibroblastic characteristics in patients with degenerative pathology. Furthermore, in patients with degenerative pathology, the subcultures of the lateral meniscus (especially on the inner part) presented more chondrocytic characteristics than did those of medial meniscus. CONCLUSIONS The mRNA expression levels of the cultures showed significant differences according to the anatomical localization and pathology of the meniscus, indicating distinct chondrocytic and fibroblastic features. This fundamental knowledge would help researchers to choose more efficient cell sources for cell-seeding of a meniscus scaffold, and to generate a construct resembling the original meniscus tissue.
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Affiliation(s)
- Nuri Aydın
- Department of Orthopaedics and Traumatology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Bedri Karaismailoğlu
- Department of Orthopaedics and Traumatology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Merve Alaylıoğlu
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Duygu Gezen-Ak
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Büşra Şengül
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Esin Candaş
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Selma Yılmazer
- Department of Medical Biology, Faculty of Medicine, 187458Altinbas University, Istanbul, Turkey
| | - Erdinç Dursun
- Brain and Neurodegenerative Disorders Research Laboratory, Department of Medical Biology, 64298Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.,Department of Neuroscience, Institute of Neurological Sciences, Istanbul University-Cerrahpasa, Istanbul, Turkey
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7
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Okazaki Y, Furumatsu T, Kamatsuki Y, Nishida K, Nasu Y, Nakahara R, Saito T, Ozaki T. Differences between the root and horn cells of the human medial meniscus from the osteoarthritic knee in cellular characteristics and responses to mechanical stress. J Orthop Sci 2021; 26:230-236. [PMID: 32223991 DOI: 10.1016/j.jos.2020.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 02/14/2020] [Accepted: 02/29/2020] [Indexed: 02/09/2023]
Abstract
BACKGROUND Many histological, mechanical, and clinical studies have been performed on the medial meniscus posterior root attachment, as it often tears in patients with osteoarthritic knee. Medial meniscal root repair is recommended in clinical situations; however, to date, no studies have examined the differences between meniscal root and horn cells. The aim of this study was, therefore, to investigate the morphology, reaction to cyclic tensile strain, and gene expression levels of medial meniscal root and horn cells. METHODS Meniscal samples were obtained from the medial knee compartments of 10 patients with osteoarthritis who underwent total knee arthroplasty. Root and horn cells were cultured in Dulbecco's modified Eagle's medium without enzymes. The morphology, distribution, and proliferation of medial meniscal root and horn cells, as well as the gene and protein expression levels of Sry-type HMG box 9 and type II collagen, were determined after cyclic tensile strain treatment. RESULTS Horn cells had a triangular morphology, whereas root cells were fibroblast-like. The number of horn cells positive for Sry-type HMG box 9 and type II collagen was considerably higher than that of root cells. Although root and horn cells showed similar levels of proliferation after 48, 72, or 96 h of culture, more horn cells than root cells were lost following a 2-h treatment with 5% and 10% cyclic tensile. Sry-type HMG box 9 and α1(II) collagen mRNA expression levels were significantly enhanced in both cells after 2- and 4-h cyclic tensile strain (5%) treatment. CONCLUSIONS Medial meniscal root and horn cells have distinct morphologies, reactions to mechanical stress, and cellular phenotypes. Our results suggest that physiological tensile strain is important to activate extracellular matrix production in horn cells.
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Affiliation(s)
- Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan.
| | - Yusuke Kamatsuki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Keiichiro Nishida
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Yoshihisa Nasu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Ryuichi Nakahara
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Taichi Saito
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
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Szojka AR, Marqueti RDC, Li DX, Molter CW, Liang Y, Kunze M, Mulet-Sierra A, Jomha NM, Adesida AB. Human engineered meniscus transcriptome after short-term combined hypoxia and dynamic compression. J Tissue Eng 2021; 12:2041731421990842. [PMID: 33613959 PMCID: PMC7874349 DOI: 10.1177/2041731421990842] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 01/10/2021] [Indexed: 12/30/2022] Open
Abstract
This study investigates the transcriptome response of meniscus fibrochondrocytes (MFCs) to the low oxygen and mechanical loading signals experienced in the knee joint using a model system. We hypothesized that short term exposure to the combined treatment would promote a matrix-forming phenotype supportive of inner meniscus tissue formation. Human MFCs on a collagen scaffold were stimulated to form fibrocartilage over 6 weeks under normoxic (NRX, 20% O2) conditions with supplemented TGF-β3. Tissues experienced a delayed 24h hypoxia treatment (HYP, 3% O2) and then 5 min of dynamic compression (DC) between 30 and 40% strain. Delayed HYP induced an anabolic and anti-catabolic expression profile for hyaline cartilage matrix markers, while DC induced an inflammatory matrix remodeling response along with upregulation of both SOX9 and COL1A1. There were 41 genes regulated by both HYP and DC. Overall, the combined treatment supported a unique gene expression profile favouring the hyaline cartilage aspect of inner meniscus matrix and matrix remodeling.
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Affiliation(s)
- Alexander Ra Szojka
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Rita de Cássia Marqueti
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada.,Graduate Program of Rehabilitation Sciences, University of Brasília (UnB), Brasília, Distrito Federal, Brazil
| | - David Xinzheyang Li
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada.,Department of Civil and Environmental Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada
| | - Clayton W Molter
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Yan Liang
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Melanie Kunze
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Aillette Mulet-Sierra
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Nadr M Jomha
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
| | - Adetola B Adesida
- Department of Surgery, Divisions of Orthopaedic Surgery and Surgical Research, Faculty of Medicine & Dentistry, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, Canada
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Hashimoto S, Ichinose T, Ohsawa T, Koibuchi N, Chikuda H. Extracorporeal Shockwave Therapy Accelerates the Healing of a Meniscal Tear in the Avascular Region in a Rat Model. Am J Sports Med 2019; 47:2937-2944. [PMID: 31503505 DOI: 10.1177/0363546519871059] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The treatment of meniscal tears in the avascular region remains a clinical challenge. Extracorporeal shockwave therapy (ESWT) is a minimally invasive, safe, and effective therapy for various orthopaedic disorders. However, the therapeutic effect of ESWT on meniscal tears has not been reported. PURPOSE To evaluate the therapeutic effect of ESWT in the treatment of meniscal tears. STUDY DESIGN Controlled laboratory study. METHODS Twelve-week-old male Wistar rats were divided into 3 groups (normal, ESWT-, and ESWT+). The authors made a full-thickness 2-mm longitudinal tear in the avascular region of the anterior horn in the latter 2 groups. At 1 week after surgery, the ESWT+ group received 800 impulses of shockwave at 0.22-mJ/mm2 energy flux density in a single session. The authors performed a histological examination to evaluate meniscal healing (n = 10 for each group) and immunohistochemistry to analyze the expression of bromodeoxyuridine (BrdU; n = 5 for each group) and CCN family member 2/connective tissue growth factor (CCN2/CTGF; n = 5 for each group) at 2, 4, and 8 weeks after ESWT. The mRNA levels of CCN2, SOX 9, VEGF-a, aggrecan, Col1a2, and Col2a1 at the site of the meniscal tear at 4 weeks after ESWT were quantitatively evaluated by a real-time polymerase chain reaction (n = 5 for each group). RESULTS The meniscus healing scores in the ESWT+ group were significantly higher than those in the ESWT- group at 4 weeks and 8 weeks. The ratio of BrdU-positive cells was the highest in the ESWT+ group at all observation periods. The ratio of CCN2-positive cells was highest in the ESWT+ group at 4 and 8 weeks. In the ESWT+ group, real-time polymerase chain reaction revealed that the levels of CCN2, SOX9, aggrecan, and Col2a1 were upregulated (All significant data were P < .05). CONCLUSION ESWT promoted the healing of meniscal tears in the avascular area. ESWT stimulated proliferation of meniscal cells and the upregulation of cartilage-repairing factors such as CCN2, with the upregulation of cartilage-specific extracellular matrix expression. CLINICAL RELEVANCE ESWT may be an effective therapeutic option that promotes meniscal healing in the avascular region.
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Affiliation(s)
- Shogo Hashimoto
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Tsuyoshi Ichinose
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takashi Ohsawa
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Noriyuki Koibuchi
- Department of Integrative Physiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hirotaka Chikuda
- Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan
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Baek J, Lotz MK, D'Lima DD. Core-Shell Nanofibrous Scaffolds for Repair of Meniscus Tears. Tissue Eng Part A 2019; 25:1577-1590. [PMID: 30950316 DOI: 10.1089/ten.tea.2018.0319] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Electrospinning is an attractive method of fabricating nanofibers that replicate the ultrastructure of the human meniscus. However, it is challenging to approximate the mechanical properties of meniscal tissue while maintaining the biocompatibility of collagen fibers. Our objective was to determine if functionalizing polylactic acid (PLA) nanofibers with collagen would enhance their biocompatibility. We therefore used coaxial electrospinning to generate core-shell nanofibers with a core of PLA for mechanical strength and a shell of collagen to enhance cell attachment and matrix synthesis. We characterized the nanostructure of the engineered scaffolds and measured the hydrophilic and mechanical properties. We assessed the performance of human meniscal cells seeded on coaxial electrospun scaffolds to produce meniscal tissue by gene expression and histology. Finally, we investigated whether these cell-seeded scaffolds could repair surgical tears created ex vivo in avascular meniscal explants. Histology, immunohistochemistry, and mechanical testing of ex vivo repair provided evidence of neotissue that was significantly better integrated with the native tissue than with the acellular coaxial electrospun scaffolds. Human meniscal cell-seeded coaxial electrospun scaffolds may have potential in enhancing repair of avascular meniscus tears. Impact Statement The success of any tissue-engineered meniscus graft relies on its ability to mimic native three-dimensional microstructure, support cell growth, produce tissue-specific matrix, and enhance graft integration into the repair site. Polylactic acid scaffolds possess the desired mechanical properties, whereas collagen scaffolds induce better cell attachment and enhanced tissue regeneration. We therefore fabricated nanofibrous scaffolds that combined the properties of two biomaterials. These novel coaxial scaffolds more closely emulated the structure, mechanical properties, and biochemical composition of native meniscal tissue. Our findings of meniscogenic tissue generation and integration in meniscus defects have the potential to be translated to clinical use.
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Affiliation(s)
- Jihye Baek
- Shiley Center for Orthopedic Research and Education, Scripps Clinic, La Jolla, California.,Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California
| | - Martin K Lotz
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California
| | - Darryl D D'Lima
- Shiley Center for Orthopedic Research and Education, Scripps Clinic, La Jolla, California.,Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California
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Qu D, Zhu JP, Childs HR, Lu HH. Nanofiber-based transforming growth factor-β3 release induces fibrochondrogenic differentiation of stem cells. Acta Biomater 2019; 93:111-122. [PMID: 30862549 DOI: 10.1016/j.actbio.2019.03.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 12/21/2022]
Abstract
Fibrocartilage is typically found in regions subject to complex, multi-axial loads and plays a critical role in musculoskeletal function. Mesenchymal stem cell (MSC)-mediated fibrocartilage regeneration may be guided by administration of appropriate chemical and/or physical cues, such as by culturing cells on polymer nanofibers in the presence of the chondrogenic growth factor TGF-β3. However, targeted delivery and maintenance of effective local factor concentrations remain challenges for implementation of growth factor-based regeneration strategies in clinical settings. Thus, the objective of this study was to develop and optimize the bioactivity of a biomimetic nanofiber scaffold system that enables localized delivery of TGF-β3. To this end, we fabricated TGF-β3-releasing nanofiber meshes that provide sustained growth factor delivery and demonstrated their potential for guiding synovium-derived stem cell (SDSC)-mediated fibrocartilage regeneration. TGF-β3 delivery enhanced cell proliferation and synthesis of relevant fibrocartilaginous matrix in a dose-dependent manner. By designing a scaffold that eliminates the need for exogenous or systemic growth factor administration and demonstrating that fibrochondrogenesis requires a lower growth factor dose compared to previously reported, this study represents a critical step towards developing a clinical solution for regeneration of fibrocartilaginous tissues. STATEMENT OF SIGNIFICANCE: Fibrocartilage is a tissue that plays a critical role throughout the musculoskeletal system. However, due to its limited self-healing capacity, there is a significant unmet clinical need for more effective approaches for fibrocartilage regeneration. We have developed a nanofiber-based scaffold that provides both the biomimetic physical cues, as well as localized delivery of the chemical factors needed to guide stem cell-mediated fibrocartilage formation. Specifically, methods for fabricating TGF-β3-releasing nanofibers were optimized, and scaffold-mediated TGF-β3 delivery enhanced cell proliferation and synthesis of fibrocartilaginous matrix, demonstrating for the first time, the potential for nanofiber-based TGF-β3 delivery to guide stem cell-mediated fibrocartilage regeneration. This nanoscale delivery platform represents an exciting new strategy for fibrocartilage regeneration.
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Affiliation(s)
- Dovina Qu
- Biomaterials and Interface Tissue Engineering Laboratory, Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace Building, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, United States
| | - Jennifer P Zhu
- Biomaterials and Interface Tissue Engineering Laboratory, Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace Building, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, United States
| | - Hannah R Childs
- Biomaterials and Interface Tissue Engineering Laboratory, Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace Building, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, United States
| | - Helen H Lu
- Biomaterials and Interface Tissue Engineering Laboratory, Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace Building, MC 8904, 1210 Amsterdam Avenue, New York, NY 10027, United States.
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12
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Murakami T, Otsuki S, Okamoto Y, Nakagawa K, Wakama H, Okuno N, Neo M. Hyaluronic acid promotes proliferation and migration of human meniscus cells via a CD44-dependent mechanism. Connect Tissue Res 2019; 60:117-127. [PMID: 29658360 DOI: 10.1080/03008207.2018.1465053] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Treatment of meniscal injury is important for osteoarthritis (OA) prevention. Meniscus cells are divided between inner and outer cells, which have different characteristics and vascularity. We evaluated the effects of hyaluronic acid (HA) on the proliferation and migration of human inner and outer meniscus cells, and investigated the underlying healing mechanisms. MATERIALS AND METHODS Lateral menisci from 18 patients who underwent total knee arthroplasty were used. Meniscus cells were harvested from the outer and inner menisci and evaluated using migration and proliferation assays after treatment with HA or chondroitin sulfate (CS). The effects of HA on prostaglandin E2 (PGE2)-induced apoptosis and gene expression were evaluated. RESULTS Cell migration and proliferation were increased by HA in a concentration-dependent manner, in both inner and outer meniscus cells. PGE2-induced apoptosis and caspase-3/7 activity were suppressed by HA in both inner and outer meniscus cells, and these effects were blocked by an anti-CD44 antibody. COL2A1 and ACAN mRNA levels were upregulated following HA treatment of inner meniscus cells. MMP13 mRNA was downregulated following CS stimulation of both inner and outer meniscus cells. These results suggest that CS treatment suppresses the inflammatory reaction rather than providing meniscal restoration. The phosphatidylinositol 3-kinase (PI3K) and mitogen-activated protein kinase (MAPK) pathways were activated by HA in both types of meniscus cells; these effects were blocked by treatment with an anti-CD44 antibody. CONCLUSIONS HA promoted human meniscus regeneration by inhibiting apoptosis, promoting cell migration, and accelerating cell proliferation, potentially through the PI3K/MAPK pathway via the CD44 receptor.
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Affiliation(s)
| | - Shuhei Otsuki
- a Orthopedic Surgery , Osaka Medical College , Osaka , Japan
| | | | - Kosuke Nakagawa
- a Orthopedic Surgery , Osaka Medical College , Osaka , Japan
| | - Hitoshi Wakama
- a Orthopedic Surgery , Osaka Medical College , Osaka , Japan
| | - Nobuhiro Okuno
- a Orthopedic Surgery , Osaka Medical College , Osaka , Japan
| | - Masashi Neo
- a Orthopedic Surgery , Osaka Medical College , Osaka , Japan
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13
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Mahmood F, Clarke J, Riches P. The ionic contribution of proteoglycans to mechanical stiffness of the meniscus. Med Eng Phys 2018; 64:23-27. [PMID: 30594414 DOI: 10.1016/j.medengphy.2018.12.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 08/26/2018] [Accepted: 12/12/2018] [Indexed: 01/09/2023]
Abstract
Load transmission is an important function of the meniscus. In articular cartilage, proteoglycans help maintain hydration via negatively charged moieties. We aimed to investigate the influence of electrostatic effects on stiffness of meniscal tissue. Circular discs from bovine menisci of 8 mm diameter and 5 mm thickness were placed within a confined compression chamber. The apparatus was bathed in distilled water, 0.14 M PBS or 3 M PBS before being subjected to 5% ramp compressive strain and held for 300s. FEBio software was used to fit resultant relaxation curves to a non-linear poroviscoelastic model with strain dependent Holmes-Mow permeability. Analysis was conducted using one-way ANOVA with Tukey post-hoc analysis. 10 samples were tested in each solution. Significant differences (p < 0.05) were observed between the values for Young's modulus, zero strain dependent permeability and the viscoelastic coefficient for samples tested in 3 M PBS as compared to deionised water/0.14 M PBS. No significant differences were observed in the strain dependent/stiffening coefficients or the relaxation time. Approximately 79% of the stiffness of the meniscus appears attributable to ionic effects. Ionic effects play a significant role in the mechanical stiffness of the meniscus. It is important to include the influence of ionic effects when developing mathematical models of this tissue.
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Affiliation(s)
- Fahd Mahmood
- Biomedical Engineering Unit, Wolfson Building, University of Strathclyde, 106 Rottenrow, Glasgow, G4 0NW, UK; Department of Orthopaedics, Golden Jubilee National Hospital, Agamemnon Street, Clydebank, G81 4DY, UK.
| | - Jon Clarke
- Department of Orthopaedics, Golden Jubilee National Hospital, Agamemnon Street, Clydebank, G81 4DY, UK
| | - Philip Riches
- Biomedical Engineering Unit, Wolfson Building, University of Strathclyde, 106 Rottenrow, Glasgow, G4 0NW, UK
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14
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Kamatsuki Y, Aoyama E, Furumatsu T, Miyazawa S, Maehara A, Yamanaka N, Nishida T, Kubota S, Ozaki T, Takigawa M. Possible reparative effect of low-intensity pulsed ultrasound (LIPUS) on injured meniscus. J Cell Commun Signal 2018; 13:193-207. [PMID: 30460593 DOI: 10.1007/s12079-018-0496-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/12/2018] [Indexed: 12/11/2022] Open
Abstract
Menisci are a pair of crescent-shaped fibrocartilages, particularly of which their inner region of meniscus is an avascular tissue. It has characteristics similar to those of articular cartilage, and hence is inferior in healing. We previously reported that low-intensity pulsed ultrasound (LIPUS) treatment stimulates the production of CCN2/CTGF, a protein involved in repairing articular cartilage, and the gene expression of major cartilage matrices such as type II collagen and aggrecan in cultured chondrocytes. Therefore, in this present study, we investigated whether LIPUS has also favorable effect on meniscus cells and tissues. LIPUS applied with a 60 mW/cm2 intensity for 20 min stimulated the gene expression and protein production of CCN2 via ERK and p38 signaling pathways, as well as gene expression of SOX9, aggrecan, and collagen type II in human inner meniscus cells in culture, and slightly stimulated the gene expression of CCN2 and promoted the migration in human outer meniscus cells in culture. LIPUS also induced the expression of Ccn2, Sox9, Col2a1, and Vegf in rat intact meniscus. Furthermore, histological evaluations showed that LIPUS treatment for 1 to 4 weeks promoted healing of rat injured lateral meniscus, as evidenced by better and earlier angiogenesis and extracellular matrix synthesis. The data presented indicate that LIPUS treatment might prevent meniscus from degenerative change and exert a reparative effect on injured meniscus via up-regulation of repairing factors such as CCN2 and that it might thus be useful for treatment of an injured meniscus as a non-invasive therapy.
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Affiliation(s)
- Yusuke Kamatsuki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan.,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, Kita-ku, Okayama, 700-8525, Japan
| | - Eriko Aoyama
- 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, Kita-ku, Okayama, 700-8525, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Shinichi Miyazawa
- Department of Intelligent Orthopedic System, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama, Japan
| | - Ami Maehara
- Department of Intelligent Orthopedic System, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1, Shikata-cho, Kita-ku, Okayama, Japan
| | | | - Takashi Nishida
- 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
| | - Satoshi Kubota
- 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, 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
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - 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, Kita-ku, Okayama, 700-8525, Japan.
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15
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Furumatsu T, Maehara A, Okazaki Y, Ozaki T. Intercondylar and central regions of complete discoid lateral meniscus have different cell and matrix organizations. J Orthop Sci 2018; 23:811-818. [PMID: 29937131 DOI: 10.1016/j.jos.2018.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/16/2018] [Accepted: 05/17/2018] [Indexed: 11/17/2022]
Abstract
BACKGROUND A complete discoid lateral meniscus (DLM) has a high risk of horizontal tear. However, cellular phenotypes and extracellular matrix organizations in complete DLMs are still unclear. The aim of this study was to investigate histological and cellular biological characteristics in both the intercondylar and central regions of complete DLM. MATERIALS AND METHODS Meniscal samples were obtained from the intercondylar and central regions of complete DLM (n = 6). Blood vessels and aggregated cell ratio were measured in each region. Depositions of type I/II collagens and safranin O-stained proteoglycans in the extracellular matrix were assessed. Experiments in gene expression, morphology, proliferation, and effect of mechanical stretch were performed using cultured cells derived from each region. RESULTS Blood vessel counts were significantly higher in the intercondylar region than in the central region. The ratio of aggregated cells was lower in the intercondylar region than in the central region. Deposition of type I collagen was comparable for both regions. The central region contained a larger quantity of type II collagen and safranin O staining density compared with the intercondylar region. Proliferation of the fibroblastic intercondylar cells was not affected by 5%-stretching. However, stretching treatments decreased relative proliferation of the chondrocytic central cells. CONCLUSIONS This study demonstrated that the central region of complete DLM had different cellular properties and collagen components compared with the intercondylar region. Our results suggest that the central region of complete DLM may have a low healing potential like the inner avascular region of the meniscus.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan.
| | - Ami Maehara
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan
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16
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Tanaka T, Furumatsu T, Miyazawa S, Fujii M, Inoue H, Kodama Y, Ozaki T. Hyaluronan stimulates chondrogenic gene expression in human meniscus cells. Connect Tissue Res 2017; 58:520-530. [PMID: 27898233 DOI: 10.1080/03008207.2016.1264944] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
UNLABELLED Purpose/Aim of the Study: Inner meniscus cells have a chondrocytic phenotype, whereas outer meniscus cells have a fibroblastic phenotype. In this study, we examined the effect of hyaluronan on chondrocytic gene expression in human meniscus cells. MATERIALS AND METHODS Human meniscus cells were prepared from macroscopically intact lateral meniscus. Inner and outer meniscus cells were obtained from the inner and outer halves of the meniscus. The cells were stimulated with hyaluronan diluted in Dulbecco's modified Eagle's medium without serum to the desired concentration (0, 10, 100, and 1000 μg/mL) for 2-7 days. Cellular proliferation, migration, and polymerase chain reaction analyses were performed for the inner and outer cells separately. Meniscal samples perforated by a 2 mm diameter punch were maintained for 3 weeks in hyaluronan-supplemented medium and evaluated by histological analyses. RESULTS Hyaluronan increased the proliferation and migration of both meniscus cell types. Moreover, cellular counts at the surface of both meniscal tissue perforations were increased by hyaluronan treatments. In addition, hyaluronan stimulated α1(II) collagen expression in inner meniscus cells. Accumulation of type II collagen at the perforated surface of both meniscal samples was induced by hyaluronan treatment. Hyaluronan did not induce type I collagen accumulation around the injured site of the meniscus. CONCLUSION Hyaluronan stimulated the proliferation and migration of meniscus cells. Our results suggest that hyaluronan may promote the healing potential of meniscus cells in damaged meniscal tissues.
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Affiliation(s)
- Takaaki Tanaka
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Takayuki Furumatsu
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Shinichi Miyazawa
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Masataka Fujii
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Hiroto Inoue
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Yuya Kodama
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Toshifumi Ozaki
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
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17
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The distribution of vascular endothelial growth factor in human meniscus and a meniscal injury model. J Orthop Sci 2017; 22:715-721. [PMID: 28318650 DOI: 10.1016/j.jos.2017.02.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/11/2017] [Accepted: 02/22/2017] [Indexed: 02/09/2023]
Abstract
BACKGROUND The meniscus plays an important role in controlling the complex biomechanics of the knee. Meniscus injury is common in the knee joint. The perimeniscal capillary plexus supplies the outer meniscus, whereas the inner meniscus is composed of avascular tissue. Angiogenesis factors, such as vascular endothelial growth factor (VEGF), have important roles in promoting vascularization of various tissues. VEGF-mediated neovascularization is beneficial to the healing of injured tissues. However, the distribution and angiogenic role of VEGF remains unclear in the meniscus and injured meniscus. We hypothesized that VEGF could affect meniscus cells and modulate the meniscus healing process. METHODS Menisci were obtained from total knee arthroplasty patients. Meniscal injury was created ex vivo by a microsurgical blade. VEGF mRNA and protein expression were detected by the polymerase chain reaction and immunohistochemical analyses, respectively. RESULTS In native meniscal tissue, the expression of VEGF and HIF-1α mRNAs could not be detected. However, VEGF and HIF-1α mRNAs were found in cultured meniscal cells (VEGF: outer > inner; HIF-1α: outer = inner). Injury increased mRNA levels of both VEGF and HIF-1α, with the increase being greatest in the outer area. Immunohistochemical analyses revealed that VEGF protein was detected mainly in the outer region and around injured areas of the meniscus. However, VEGF concentrations were similar between inner and outer menisci-derived media. CONCLUSIONS This study demonstrated that both the inner and outer regions of the meniscus contained VEGF. HIF-1α expression and VEGF deposition were high in injured meniscal tissue. Our results suggest that injury stimulates the expression of HIF-1α and VEGF that may be preserved in the extracellular matrix as the healing stimulator of damaged meniscus, especially in the outer meniscus.
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18
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Baek J, Sovani S, Choi W, Jin S, Grogan SP, D'Lima DD. Meniscal Tissue Engineering Using Aligned Collagen Fibrous Scaffolds: Comparison of Different Human Cell Sources. Tissue Eng Part A 2017; 24:81-93. [PMID: 28463545 DOI: 10.1089/ten.tea.2016.0205] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Hydrogel and electrospun scaffold materials support cell attachment and neotissue development and can be tuned to structurally and mechanically resemble native extracellular matrix by altering either electrospun fiber or hydrogel properties. In this study, we examined meniscus tissue generation from different human cell sources including meniscus cells derived from vascular and avascular regions, human bone marrow-derived mesenchymal stem cells, synovial cells, and cells from the infrapatellar fat pad (IPFP). All cells were seeded onto aligned electrospun collagen type I scaffolds and were optionally encapsulated in a tricomponent hydrogel. Single or multilayered constructs were generated and cultivated in defined medium with selected growth factors for 2 weeks. Cell viability, cell morphology, and gene-expression profiles were monitored using confocal microscopy, scanning electron microscopy, and quantitative polymerase chain reaction (qPCR), respectively. Multilayered constructs were examined with histology, immunohistochemistry, qPCR, and for tensile mechanical properties. For all cell types, TGFβ1 and TGFβ3 treatment increased COL1A1, COMP, Tenascin C (TNC), and Scleraxis (SCX) gene expression and deposition of collagen type I protein. IPFP cells generated meniscus-like tissues with higher meniscogenic gene expression, mechanical properties, and better cell distribution compared to other cell types studied. We show proof of concept that electrospun collagen scaffolds support neotissue formation and IPFP cells have potential for use in cell-based meniscus regeneration strategies.
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Affiliation(s)
- Jihye Baek
- 1 Shiley Center for Orthopaedic Research and Education at Scripps Clinic , La Jolla, California.,2 Department of Material Science and Engineering, University of California , San Diego, La Jolla, California
| | - Sujata Sovani
- 1 Shiley Center for Orthopaedic Research and Education at Scripps Clinic , La Jolla, California
| | - Wonchul Choi
- 1 Shiley Center for Orthopaedic Research and Education at Scripps Clinic , La Jolla, California
| | - Sungho Jin
- 2 Department of Material Science and Engineering, University of California , San Diego, La Jolla, California
| | - Shawn P Grogan
- 1 Shiley Center for Orthopaedic Research and Education at Scripps Clinic , La Jolla, California
| | - Darryl D D'Lima
- 1 Shiley Center for Orthopaedic Research and Education at Scripps Clinic , La Jolla, California
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19
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Kremer A, Ribitsch I, Reboredo J, Dürr J, Egerbacher M, Jenner F, Walles H. Three-Dimensional Coculture of Meniscal Cells and Mesenchymal Stem Cells in Collagen Type I Hydrogel on a Small Intestinal Matrix—A Pilot Study Toward Equine Meniscus Tissue Engineering. Tissue Eng Part A 2017; 23:390-402. [DOI: 10.1089/ten.tea.2016.0317] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- Antje Kremer
- Department of Tissue Engineering and Regenerative Medicine (TERM), University Hospital Wuerzburg, Wuerzburg, Germany
- Translational Center Wuerzburg ‘Regenerative therapies,’ Wuerzburg Branch of the Fraunhofer IGB, Wuerzburg, Germany
| | - Iris Ribitsch
- Vienna Equine Tissue Engineering and Regenerative Medicine, Equine Clinic, University of Veterinary Medicine Vienna, Vienna, Austria
- Department of Companion Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Jenny Reboredo
- Department of Tissue Engineering and Regenerative Medicine (TERM), University Hospital Wuerzburg, Wuerzburg, Germany
- Translational Center Wuerzburg ‘Regenerative therapies,’ Wuerzburg Branch of the Fraunhofer IGB, Wuerzburg, Germany
| | - Julia Dürr
- Department of Pathobiology, Institute of Histology & Embryology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Monika Egerbacher
- Department of Pathobiology, Institute of Histology & Embryology, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Florien Jenner
- Vienna Equine Tissue Engineering and Regenerative Medicine, Equine Clinic, University of Veterinary Medicine Vienna, Vienna, Austria
- Department of Companion Animals and Horses, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Heike Walles
- Department of Tissue Engineering and Regenerative Medicine (TERM), University Hospital Wuerzburg, Wuerzburg, Germany
- Translational Center Wuerzburg ‘Regenerative therapies,’ Wuerzburg Branch of the Fraunhofer IGB, Wuerzburg, Germany
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20
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Shimomura K, Rothrauff BB, Tuan RS. Region-Specific Effect of the Decellularized Meniscus Extracellular Matrix on Mesenchymal Stem Cell-Based Meniscus Tissue Engineering. Am J Sports Med 2017; 45:604-611. [PMID: 27895039 DOI: 10.1177/0363546516674184] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The meniscus is the most commonly injured knee structure, and surgical repair is often ineffective. Tissue engineering-based repair or regeneration may provide a needed solution. Decellularized, tissue-derived extracellular matrices (ECMs) have received attention for their potential use as tissue-engineered scaffolds. In considering meniscus-derived ECMs (mECMs) for meniscus tissue engineering, it is noteworthy that the inner and outer regions of the meniscus have different structural and biochemical features, potentially directing the differentiation of cells toward region-specific phenotypes. PURPOSE To investigate the applicability of mECMs for meniscus tissue engineering by specifically comparing region-dependent effects of mECMs on 3-dimensional constructs seeded with human bone marrow mesenchymal stem cells (hBMSCs). STUDY DESIGN Controlled laboratory study. METHODS Bovine menisci were divided into inner and outer halves and were minced, treated with Triton X-100 and DNase, and extracted with urea. Then, hBMSCs (1 × 106 cells/mL) were encapsulated in a photo-cross-linked 10% polyethylene glycol diacrylate scaffold containing mECMs (60 μg/mL) derived from either the inner or outer meniscus, with an ECM-free scaffold as a control. The cell-seeded constructs were cultured with chondrogenic medium containing recombinant human transforming growth factor β3 (TGF-β3) and were analyzed for expression of meniscus-associated genes as well as for the collagen (hydroxyproline) and glycosaminoglycan content as a function of time. RESULTS Decellularization was verified by the absence of 4',6-diamidino-2-phenylindole (DAPI)-stained cell nuclei and a reduction in the DNA content. Quantitative real-time polymerase chain reaction showed that collagen type I expression was significantly higher in the outer mECM group than in the other groups, while collagen type II and aggrecan expression was highest in the inner mECM group. The collagen (hydroxyproline) content was highest in the outer mECM group, while the glycosaminoglycan content was higher in both the inner and outer mECM groups compared with the control group. CONCLUSION These results showed that the inner mECM enhances the fibrocartilaginous differentiation of hBMSCs, while the outer mECM promotes a more fibroblastic phenotype. Our findings support the feasibility of fabricating bioactive scaffolds using region-specific mECM preparations for meniscus tissue engineering. CLINICAL RELEVANCE This is the first report to demonstrate the feasibility of applying region-specific mECMs for the engineering of meniscus implants capable of reproducing the biphasic, anatomic, and biochemical characteristics of the meniscus, features that should contribute to the feasibility of their clinical application.
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Affiliation(s)
- Kazunori Shimomura
- Medicine for Sports and Performing Arts, Department of Health and Sport Sciences, Osaka University Graduate School of Medicine, Osaka, Japan.,Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Benjamin B Rothrauff
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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21
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Furumatsu T, Ozaki T. An Analysis of Pathological Activities of CCN Proteins in Joint Disorders: Mechanical Stretch-Mediated CCN2 Expression in Cultured Meniscus Cells. Methods Mol Biol 2017; 1489:533-542. [PMID: 27734404 DOI: 10.1007/978-1-4939-6430-7_45] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The multifunctional growth factor CYR61/CTGF/NOV (CCN) 2, also known as connective tissue growth factor, regulates cellular proliferation, differentiation, and tissue regeneration. Recent literatures have described important roles of CCN2 in the meniscus metabolism. However, the mechanical stress-mediated transcriptional regulation of CCN2 in the meniscus remains unclear. The meniscus is a fibrocartilaginous tissue that controls complex biomechanics of the knee joint. Therefore, the injured unstable meniscus has a poor healing potential especially in the avascular inner region. In addition, dysfunction of the meniscus correlates with the progression of degenerative knee joint disorders and joint space narrowing. Here, we describe an experimental approach that investigates the distinct cellular behavior of inner and outer meniscus cells in response to mechanical stretch. Our experimental model can analyze the relationships between stretch-induced CCN2 expression and its functional role in the meniscus homeostasis.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan.
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
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Numpaisal PO, Rothrauff BB, Gottardi R, Chien CL, Tuan RS. Rapidly dissociated autologous meniscus tissue enhances meniscus healing: An in vitro study. Connect Tissue Res 2016; 58:355-365. [PMID: 27726454 DOI: 10.1080/03008207.2016.1245727] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Treatment of meniscus tears is a persistent challenge in orthopedics. Although cell therapies have shown promise in promoting fibrocartilage formation in in vitro and preclinical studies, clinical application has been limited by the paucity of autologous tissue and the need for ex vivo cell expansion. Rapid dissociation of the free edges of the anterior and posterior meniscus with subsequent implantation in a meniscus lesion may overcome these limitations. The purpose of this study was to explore the effect of rapidly dissociated meniscus tissue in enhancing neotissue formation in a radial meniscus tear, as simulated in an in vitro explant model. MATERIALS AND METHODS All experiments in this study, performed at minimum with biological triplicates, utilized meniscal tissues from hind limbs of young cows. The effect of varying collagenase concentration (0.1%, 0.2% and 0.5% w/v) and treatment duration (overnight and 30 minutes) on meniscus cell viability, organization of the extracellular matrix (ECM), and gene expression was assessed through a cell metabolism assay, microscopic examination, and quantitative real-time reverse transcription polymerase chain reaction analysis, respectively. Thereafter, an explant model of a radial meniscus tear was used to evaluate the effect of a fibrin gel seeded with one of the following: (1) fibrin alone, (2) isolated and passaged (P2) meniscus cells, (3) overnight digested tissue, and (4) rapidly dissociated tissue. The quality of in vitro healing was determined through histological analysis and derivation of an adhesion index. RESULTS Rapid dissociation in 0.2% collagenase yielded cells with higher levels of metabolism than either 0.1% or 0.5% collagenase. When seeded in a three-dimensional fibrin hydrogel, both overnight digested and rapidly dissociated cells expressed greater levels of collagens type I and II than P2 meniscal cells at 1 week. At 4 and 8 weeks, collagen type II expression remained elevated only in the rapid dissociation group. Histological examination revealed enhanced healing in all cell-seeded treatment groups over cell-free fibrin controls at weeks 1, 4, and 8, but there were no significant differences across the treatment groups. CONCLUSIONS Rapid dissociation of meniscus tissue may provide a single-step approach to augment regenerative healing of meniscus repairs.
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Affiliation(s)
- Piya-On Numpaisal
- a Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery , University of Pittsburgh School of Medicine , Pittsburgh , PA , USA.,b Department of Anatomy and Cell Biology , College of Medicine, National Taiwan University , Taipei , Taiwan.,c Institute of Medicine, Suranaree University of Technology , Nakhon Ratchasima , Thailand
| | - Benjamin B Rothrauff
- a Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery , University of Pittsburgh School of Medicine , Pittsburgh , PA , USA.,d McGowan Institute for Regenerative Medicine, University of Pittsburgh , Pittsburgh , PA , USA
| | - Riccardo Gottardi
- a Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery , University of Pittsburgh School of Medicine , Pittsburgh , PA , USA.,e Ri.MED Foundation , Palermo , Italy
| | - Chung-Liang Chien
- b Department of Anatomy and Cell Biology , College of Medicine, National Taiwan University , Taipei , Taiwan
| | - Rocky S Tuan
- a Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery , University of Pittsburgh School of Medicine , Pittsburgh , PA , USA.,d McGowan Institute for Regenerative Medicine, University of Pittsburgh , Pittsburgh , PA , USA
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Inoue H, Furumatsu T, Maehara A, Tanaka T, Ozaki T. Histological and biological comparisons between complete and incomplete discoid lateral meniscus. Connect Tissue Res 2016; 57:408-16. [PMID: 27267748 DOI: 10.1080/03008207.2016.1195827] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The discoid lateral meniscus (DLM) is an anatomically abnormal meniscus that covers a greater area of the tibial plateau than the normal meniscus. The DLM is classified into two types: complete (CDLM) and incomplete (ICDLM) types. In this study, we investigated the histological and cell biological characteristics of CDLM and ICDLM. The number of blood vessels, proteoglycan deposition, and collagen distribution were assessed using meniscal tissues. Collagen production was also investigated in CDLM and ICDLM cells. The intercondylar region of the CDLM had a higher number of blood vessels than the inner region of the ICDLM. Safranin O staining density and type II collagen deposition in ICDLM were higher than those in CDLM. Type II collagen-positive cells were higher in ICLDM than in CDLM. CDLM cells showed slender fibroblastic morphology, while ICDLM cells were triangular chondrocytic in shape. This study demonstrated that the intercondylar region of the CDLM showed similar properties to the outer region of the meniscus. The inner region of the ICDLM, on the other hand, differed from the intercondylar region of the CDLM. Our results suggest that the intercondylar region of the CDLM may have a high healing potential like the outer meniscus.
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Affiliation(s)
- Hiroto Inoue
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Takayuki Furumatsu
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Ami Maehara
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Takaaki Tanaka
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
| | - Toshifumi Ozaki
- a Department of Orthopaedic Surgery , Okayama University Graduate School , Okayama , Japan
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Berneel E, Philips C, Declercq H, Cornelissen R. Redifferentiation of High-Throughput Generated Fibrochondrocyte Micro-Aggregates: Impact of Low Oxygen Tension. Cells Tissues Organs 2016; 202:369-381. [DOI: 10.1159/000447509] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2016] [Indexed: 11/19/2022] Open
Abstract
In meniscus tissue engineering strategies, enhancing the matrix quality of the neomeniscal tissue is important. When the differentiated phenotype of fibrochondrocytes is lost, the quality of the matrix becomes compromised. The objective of this study was to produce uniform fibrochondrocyte micro-aggregates with desirable phenotype and tissue homogeneity in large quantities using a simple and reproducible method. Furthermore, we investigated if hypoxia could enhance the matrix quality. Porcine fibrochondrocytes were expanded at 21% oxygen until passage 3 (P3) and a gene expression profile was determined. P3 fibrochondrocytes were cultivated in chondrogenic medium at 5 and 21% oxygen in high-throughput agarose chips containing 2,865 microwells 200 µm in diameter. Evaluation included live/dead staining, histological examination, immunohistochemistry, dimethylmethylene blue assay and real-time reverse transcriptase quantitative polymerase chain reaction of the micro-aggregates. Gene expression analysis showed a drastic decline in collagen II and high expression of collagen I during monolayer culture. After 4 days, uniform and stable micro-aggregates could be produced. The redifferentiation and matrix quality of the hypoxic cultured micro-aggregates were enhanced relative to the normoxic cultures. Sulfated glycosaminoglycan synthesis was significantly higher, and collagen II expression and the collagen II/collagen I ratio were significantly upregulated in the hypoxic cultures. High-throughput production of uniform microtissues holds promise for the generation of larger-scale tissue engineering constructs or optimization of redifferentiation mechanisms for clinical applications.
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Rhee S, Puetzer JL, Mason BN, Reinhart-King CA, Bonassar LJ. 3D Bioprinting of Spatially Heterogeneous Collagen Constructs for Cartilage Tissue Engineering. ACS Biomater Sci Eng 2016; 2:1800-1805. [DOI: 10.1021/acsbiomaterials.6b00288] [Citation(s) in RCA: 242] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephanie Rhee
- Meinig School of Biomedical Engineering and ‡Sibley School
of Mechanical and
Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Jennifer L. Puetzer
- Meinig School of Biomedical Engineering and ‡Sibley School
of Mechanical and
Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Brooke N. Mason
- Meinig School of Biomedical Engineering and ‡Sibley School
of Mechanical and
Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Cynthia A. Reinhart-King
- Meinig School of Biomedical Engineering and ‡Sibley School
of Mechanical and
Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Lawrence J. Bonassar
- Meinig School of Biomedical Engineering and ‡Sibley School
of Mechanical and
Aerospace Engineering, Cornell University, Ithaca, New York 14850, United States
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Furumatsu T, Maehara A, Ozaki T. ROCK inhibition stimulates SOX9/Smad3-dependent COL2A1 expression in inner meniscus cells. J Orthop Sci 2016; 21:524-529. [PMID: 27113646 DOI: 10.1016/j.jos.2016.02.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 01/07/2016] [Accepted: 03/27/2016] [Indexed: 02/09/2023]
Abstract
BACKGROUND Proper functioning of the meniscus depends on the composition and organization of its fibrocartilaginous extracellular matrix. We previously demonstrated that the avascular inner meniscus has a more chondrocytic phenotype compared with the outer meniscus. Inhibition of the Rho family GTPase ROCK, the major regulator of the actin cytoskeleton, stimulates the chondrogenic transcription factor Sry-type HMG box (SOX) 9-dependent α1(II) collagen (COL2A1) expression in inner meniscus cells. However, the crosstalk between ROCK inhibition, SOX9, and other transcription modulators on COL2A1 upregulation remains unclear in meniscus cells. The aim of this study was to investigate the role of SOX9-related transcriptional complex on COL2A1 expression under the inhibition of ROCK in human meniscus cells. METHODS Human inner and outer meniscus cells were prepared from macroscopically intact lateral menisci. Cells were cultured in the presence or absence of ROCK inhibitor (ROCKi, Y27632). Gene expression, collagen synthesis, and nuclear translocation of SOX9 and Smad2/3 were analyzed. RESULTS Treatment of ROCKi increased the ratio of type I/II collagen double positive cells derived from the inner meniscus. In real-time PCR analyses, expression of SOX9 and COL2A1 genes was stimulated by ROCKi treatment in inner meniscus cells. ROCKi treatment also induced nuclear translocation of SOX9 and phosphorylated Smad2/3 in immunohistological analyses. Complex formation between SOX9 and Smad3 was increased by ROCKi treatment in inner meniscus cells. Chromatin immunoprecipitation analyses revealed that association between SOX9/Smad3 transcriptional complex with the COL2A1 enhancer region was increased by ROCKi treatment. CONCLUSIONS This study demonstrated that ROCK inhibition stimulated SOX9/Smad3-dependent COL2A1 expression through the immediate nuclear translocation of Smad3 in inner meniscus cells. Our results suggest that ROCK inhibition can stimulates type II collagen synthesis through the cooperative activation of Smad3 in inner meniscus cells. ROCKi treatment may be useful to promote the fibrochondrocytic healing of the injured inner meniscus.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan.
| | - Ami Maehara
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan
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Zhang S, Matsushita T, Kuroda R, Nishida K, Matsuzaki T, Matsumoto T, Takayama K, Nagai K, Oka S, Tabata Y, Nagamune K, Kurosaka M. Local Administration of Simvastatin Stimulates Healing of an Avascular Meniscus in a Rabbit Model of a Meniscal Defect. Am J Sports Med 2016; 44:1735-43. [PMID: 27159292 DOI: 10.1177/0363546516638342] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Repair of an avascular meniscus is challenging because of its low capacity for healing. Several reports have shown that simvastatin stimulates the anabolic activity of intervertebral fibrochondrocytes, suggesting that simvastatin may be used for the treatment of meniscal defects. PURPOSE To test whether the local administration of simvastatin stimulates healing of an avascular meniscus in rabbits. STUDY DESIGN Controlled laboratory study. METHODS In 30 Japanese White rabbits, a cylindrical defect (1.5-mm diameter) was introduced into the avascular zone of the anterior part of the medial meniscus in bilateral knees. Either a gelatin hydrogel (control group) or simvastatin-conjugated gelatin hydrogel (simvastatin group) was implanted into the defect. Histological assessments were performed using qualitative scoring systems, and immunohistochemical analysis was performed at 12 weeks after surgery. The occupation ratio (OR) and safranin O staining occupation ratio (SOR) were evaluated quantitatively at each time point. Stiffness of the regenerated tissue was analyzed biomechanically at 12 weeks after surgery. Rabbit meniscal cells were cultured in the presence or absence of 0.5 μM simvastatin, and then real-time polymerase chain reaction was performed to evaluate gene expression. RESULTS The qualitative score was significantly higher in the simvastatin group after 8 and 12 weeks (P = .031 and .035, respectively). The mean OR and SOR were also significantly higher in the simvastatin group (OR at 8 weeks: 0.396 ± 0.019 [control] vs 0.564 ± 0.123 [simvastatin], P = .008; OR at 12 weeks: 0.451 ± 0.864 [control] vs 0.864 ± 0.035 [simvastatin], P = .001; SOR at 8 weeks: 0.071 ± 0.211 [control] vs 0.487 ± 0.430 [simvastatin], P = .009; SOR at 12 weeks: 0.093 ± 0.088 [control] vs 0.821 ± 0.051 [simvastatin], P = .006). Immunohistochemical analysis showed that at 12 weeks, the reparative tissue was more strongly positive for type I collagen (COL1), type II collagen (COL2), bone morphogenetic protein 2 (BMP-2), and BMP-7 in the simvastatin group than in the control group. Biomechanical analysis showed significantly higher stiffness in the simvastatin group (2.417 ± 1.593 N/ms [control] vs 5.172 ± 1.078 N/ms [simvastatin]; P = .005). In rabbit meniscal cells, BMP-2 and BMP-7 were upregulated after 4 and 8 hours and after 7 and 14 days, whereas COL1A1 and COL2A1 were significantly upregulated by simvastatin after 7 and 14 days. CONCLUSION The local administration of simvastatin promotes the regeneration of an avascular meniscus in the rabbit model of a meniscal defect. The mechanism may involve the upregulation of BMPs and the subsequent upregulation of COL1 and COL2. CLINICAL RELEVANCE This study suggests that simvastatin stimulated intrinsic healing of an avascular meniscus. The local administration of simvastatin is safe and inexpensive and seems to be a promising treatment of meniscal injuries.
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Affiliation(s)
- Shurong Zhang
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takehiko Matsushita
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ryosuke Kuroda
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kyohei Nishida
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tokio Matsuzaki
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomoyuki Matsumoto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Takayama
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kanto Nagai
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shinya Oka
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasuhiko Tabata
- Field of Tissue Engineering, Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Kouki Nagamune
- Department of Human and Artificial Intelligent Systems, Graduate School of Engineering, University of Fukui, Fukui, Japan
| | - Masahiro Kurosaka
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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Kanazawa T, Furumatsu T, Matsumoto-Ogawa E, Maehara A, Ozaki T. Role of Rho small GTPases in meniscus cells. J Orthop Res 2014; 32:1479-86. [PMID: 25130858 DOI: 10.1002/jor.22703] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 07/01/2014] [Indexed: 02/04/2023]
Abstract
We previously reported that mechanical stretch regulates Sry-type HMG box (SOX) 9-dependent α1(II) collagen (COL2A1) expression in inner meniscus cells. This study examined the role of the small Rho guanosine 5' triphosphatase Rac1 and Rho-associated kinase (ROCK) in the regulation of stretch-induced SOX9 gene expression in cultured human inner meniscus cells. COL2A1 and SOX9 gene expression was assessed by real-time PCR after application of uni-axial cyclic tensile strain (CTS) in the presence or absence of ROCK and Rac1 inhibitors. The subcellular localization of SOX9 and the Rac1 effector cyclic AMP response element-binding protein (CREB), the phosphorylation state of SOX9, Rac1 activation, and the binding of CREB to the SOX9 promoter were assessed. CTS increased the expression of COL2A1 and SOX9, which was suppressed by inhibition of Rac1. ROCK inhibition enhanced COL2A1 and SOX9 gene expression in the absence of CTS. CTS stimulated the nuclear translocation and phosphorylation of SOX9, and increased Rac1 activation. CTS also increased the binding of CREB to the SOX9 promoter. The results suggest that mechanical stretch-dependent upregulation of SOX9 by CREB in inner meniscus cells depends on the antagonistic activities of ROCK and Rac1.
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Affiliation(s)
- Tomoko Kanazawa
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
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Di Giancamillo A, Deponti D, Addis A, Domeneghini C, Peretti GM. Meniscus maturation in the swine model: changes occurring along with anterior to posterior and medial to lateral aspect during growth. J Cell Mol Med 2014; 18:1964-74. [PMID: 25216283 PMCID: PMC4244012 DOI: 10.1111/jcmm.12367] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 06/10/2014] [Indexed: 12/27/2022] Open
Abstract
The meniscus plays important roles in knee function and mechanics and is characterized by a heterogeneous matrix composition. The changes in meniscus vascularization observed during growth suggest that the tissue-specific composition may be the result of a maturation process. This study has the aim to characterize the structural and biochemical variations that occur in the swine meniscus with age. To this purpose, menisci were collected from young and adult pigs and divided into different zones. In study 1, both lateral and medial menisci were divided into the anterior horn, the body and the posterior horn for the evaluation of glycosaminoglycans (GAGs), collagen 1 and 2 content. In study 2, the menisci were sectioned into the inner, the intermediate and the outer zones to determine the variations in the cell phenotype along with the inner–outer direction, through gene expression analysis. According to the results, the swine meniscus is characterized by an increasing enrichment in the cartilaginous component with age, with an increasing deposition in the anterior horn (GAGs and collagen 2; P < 0.01 both); moreover, this cartilaginous matrix strongly increases in the inner avascular and intermediate zone, as a consequence of a specific differentiation of meniscal cells towards a cartilaginous phenotype (collagen 2, P < 0.01). The obtained data add new information on the changes that accompany meniscus maturation, suggesting a specific response of meniscal cells to the regional mechanical stimuli in the knee joint.
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Furumatsu T, Matsumoto-Ogawa E, Tanaka T, Lu Z, Ozaki T. ROCK inhibition enhances aggrecan deposition and suppresses matrix metalloproteinase-3 production in human articular chondrocytes. Connect Tissue Res 2014; 55:89-95. [PMID: 24111521 DOI: 10.3109/03008207.2013.852544] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Homeostasis of articular cartilage is maintained by a balance between catabolism and anabolism. Matrix metalloproteinase-3 (MMP-3) catabolism of cartilaginous extracellular matrix (ECM), including aggrecan (AGN), is an important factor in osteoarthritis progression. We previously reported that inhibition of Rho-associated coiled-coil forming kinase (ROCK), an effector of Rho family GTPases, activates the chondrogenic transcription factor SRY-type high-mobility-group box (SOX) 9 and prevents dedifferentiation of monolayer-cultured chondrocytes. We hypothesized that ROCK inhibition prevents chondrocyte dedifferentiation by altering the transcriptional balance between MMP-3 and AGN. Normal human articular chondrocytes were cultured in the presence or absence of ROCK inhibitor (ROCKi, Y-27632). Expression of MMP-3 and AGN during monolayer cultivation was assessed by quantitative real-time PCR and western blot analysis. Chondrogenic redifferentiation potential of ROCKi-treated chondrocytes was evaluated by immunohistological analysis of pellet cultures. ROCKi treatment suppressed MMP-3 expression in monolayer- and pellet-cultured chondrocytes but increased AGN expression. Chromatin immunoprecipitation revealed that the association between transcription factors E26 transformation specific (ETS)-1 and SOX9 and their target genes MMP-3 and AGN, respectively, was affected by ROCKi treatment. ROCKi decreased the association between ETS-1 and its binding sites on the MMP-3 promoter, whereas ROCKi promoted the interaction between SOX9 and the AGN promoter. Our results suggest that ROCK inhibition may have an important role in modulating the balance between degradation and synthesis of cartilaginous ECM, a finding that may facilitate development of techniques to prepare differentiated chondrocytes for cartilage regeneration therapy.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences , Kitaku, Okayama , Japan
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Shen C, Yan J, Erkocak OF, Zheng XF, Chen XD. Nitric oxide inhibits autophagy via suppression of JNK in meniscal cells. Rheumatology (Oxford) 2014; 53:1022-33. [DOI: 10.1093/rheumatology/ket471] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Grogan SP, Chung PH, Soman P, Chen P, Lotz MK, Chen S, D’Lima DD. Digital micromirror device projection printing system for meniscus tissue engineering. Acta Biomater 2013; 9:7218-26. [PMID: 23523536 DOI: 10.1016/j.actbio.2013.03.020] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 03/07/2013] [Accepted: 03/14/2013] [Indexed: 12/17/2022]
Abstract
Meniscus degeneration due to age or injury can lead to osteoarthritis. Although promising, current cell-based approaches show limited success. Here we present three-dimensional methacrylated gelatin (GelMA) scaffolds patterned via projection stereolithography to emulate the circumferential alignment of cells in native meniscus tissue. Cultured human avascular zone meniscus cells from normal meniscus were seeded on the scaffolds. Cell viability was monitored, and new tissue formation was assessed by gene expression analysis and histology after 2weeks in serum-free culture with transforming growth factor β1 (10ngml(-1)). Light, confocal and scanning electron microscopy were used to observe cell-GelMA interactions. Tensile mechanical testing was performed on unseeded, fresh scaffolds and 2-week-old cell-seeded and unseeded scaffolds. 2-week-old cell-GelMA constructs were implanted into surgically created meniscus defects in an explant organ culture model. No cytotoxic effects were observed 3weeks after implantation, and cells grew and aligned to the patterned GelMA strands. Gene expression profiles and histology indicated promotion of a fibrocartilage-like meniscus phenotype, and scaffold integration with repair tissue was observed in the explant model. We show that micropatterned GelMA scaffolds are non-toxic, produce organized cellular alignment, and promote meniscus-like tissue formation. Prefabrication of GelMA scaffolds with architectures mimicking the meniscus collagen bundle organization shows promise for meniscal repair. Furthermore, the technique presented may be scaled up to repair larger defects.
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Deponti D, Di Giancamillo A, Scotti C, Peretti GM, Martin I. Animal models for meniscus repair and regeneration. J Tissue Eng Regen Med 2013; 9:512-27. [PMID: 23712959 DOI: 10.1002/term.1760] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 02/24/2013] [Accepted: 04/02/2013] [Indexed: 12/21/2022]
Abstract
The meniscus plays an important role in knee function and mechanics. Meniscal lesions, however, are common phenomena and this tissue is not able to achieve spontaneous successful repair, particularly in the inner avascular zone. Several animal models have been studied and proposed for testing different reparative approaches, as well as for studying regenerative methods aiming to restore the original shape and function of this structure. This review summarizes the gross anatomy, function, ultrastructure and biochemical composition of the knee meniscus in several animal models in comparison with the human meniscus. The relevance of the models is discussed from the point of view of basic research as well as of clinical translation for meniscal repair, substitution and regeneration. Finally, the advantages and disadvantages of each model for various research directions are critically discussed.
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Furumatsu T, Matsumoto E, Kanazawa T, Fujii M, Lu Z, Kajiki R, Ozaki T. Tensile strain increases expression of CCN2 and COL2A1 by activating TGF-β-Smad2/3 pathway in chondrocytic cells. J Biomech 2013; 46:1508-15. [PMID: 23631855 DOI: 10.1016/j.jbiomech.2013.03.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 03/23/2013] [Accepted: 03/30/2013] [Indexed: 10/26/2022]
Abstract
Physiologic mechanical stress stimulates expression of chondrogenic genes, such as multifunctional growth factor CYR61/CTGF/NOV (CCN) 2 and α1(II) collagen (COL2A1), and maintains cartilage homeostasis. In our previous studies, cyclic tensile strain (CTS) induces nuclear translocation of transforming growth factor (TGF)-β receptor-regulated Smad2/3 and the master chondrogenic transcription factor Sry-type HMG box (SOX) 9. However, the precise mechanism of stretch-mediated Smad activation remains unclear in transcriptional regulation of CCN2 and COL2A1. Here we hypothesized that CTS may induce TGF-β1 release and stimulate Smad-dependent chondrogenic gene expression in human chondrocytic SW1353 cells. Uni-axial CTS (0.5Hz, 5% strain) stimulated gene expression of CCN2 and COL2A1 in SW1353 cells, and induced TGF-β1 secretion. CCN2 synthesis and nuclear translocalization of Smad2/3 and SOX9 were stimulated by CTS. In addition, CTS increased the complex formation between phosphorylated Smad2/3 and SOX9. The CCN2 promoter activity was cooperatively enhanced by CTS and Smad3 in luciferase reporter assay. Chromatin immunoprecipitation revealed that CTS increased Smad2/3 interaction with the CCN2 promoter and the COL2A1 enhancer. Our results suggest that CTS epigenetically stimulates CCN2 transcription via TGF-β1 release associated with Smad2/3 activation and enhances COL2A1 expression through the complex formation between SOX9 and Smad2/3.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan.
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Fujii M, Furumatsu T, Yokoyama Y, Kanazawa T, Kajiki Y, Abe N, Ozaki T. Chondromodulin-I derived from the inner meniscus prevents endothelial cell proliferation. J Orthop Res 2013; 31:538-43. [PMID: 23143879 DOI: 10.1002/jor.22257] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 10/09/2012] [Indexed: 02/04/2023]
Abstract
The meniscus is a fibrocartilaginous tissue that plays an important role in controlling complex biomechanics of the knee. A perimeniscal capillary plexus supplies the outer meniscus, whereas the inner meniscus is composed of avascular tissue. Anti-angiogenic molecules, such as chondromodulin-I (ChM-I) and endostatin, have pivotal roles in preserving the avascularity of cartilage. However, the anti-angiogenic role of ChM-I is unclear in the meniscus. We hypothesized that the inner meniscus might maintain its avascular feature by expressing ChM-I. Immunohistochemical analyses revealed that ChM-I was mainly detected in the inner and superficial zones of the meniscus. On the other hand, endostatin distribution was similar between the inner and outer meniscus. In Western blot, ChM-I was detected only in the inner meniscus, whereas endostatin was equally observed in both inner and outer menisci. In addition, ChM-I concentration of the inner meniscus-derived conditioned medium was higher than that of the outer meniscus-derived medium. ChM-I removal from the inner meniscus-derived medium and functional blocking of ChM-I significantly increased endothelial cell proliferation. In this study, we demonstrated that the inner meniscus contained larger amounts of ChM-I, and that the inner meniscus-derived ChM-I inhibited endothelial cell proliferation. Our results suggest that ChM-I may be a key anti-angiogenic factor for maintaining the avascularity of the inner meniscus.
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Affiliation(s)
- Masataka Fujii
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan
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Comparison between normal and loose fragment chondrocytes in proliferation and redifferentiation potential. INTERNATIONAL ORTHOPAEDICS 2012. [PMID: 23197301 DOI: 10.1007/s00264-012-1728-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE Loose fragments in osteochondritis dissecans (OCD) of the knee require internal fixation. On the other hand, loose fragments derived from spontaneous osteonecrosis of the knee (SONK) are usually removed. However, the difference in healing potential between OCD- and SONK-related loose fragments has not been elucidated. In this study, we investigated proliferative activity and redifferentiation potential of normal cartilage-derived and loose fragment-derived chondrocytes. METHODS Cells were prepared from normal articular cartilages and loose fragment cartilages derived from knee OCD and SONK. Cellular proliferation was compared. Redifferentiation ability of pellet-cultured chondrocytes was assessed by real-time PCR analyses. Mesenchymal differentiation potential was investigated by histological analyses. Positive ratio of a stem cell marker CD166 was evaluated in each cartilaginous tissue. RESULTS Normal and OCD chondrocytes showed a higher proliferative activity than SONK chondrocytes. Chondrogenic pellets derived from normal and OCD chondrocytes produced a larger amount of safranin O-stained proteoglycans compared with SONK-derived pellets. Expression of chondrogenic marker genes was inferior in SONK pellets. The CD166-positive ratio was higher in normal cartilages and OCD loose fragments than in SONK loose fragments. CONCLUSIONS The OCD chondrocytes maintained higher proliferative activity and redifferentiation potential compared with SONK chondrocytes. Our results suggest that chondrogenic properties of loose fragment-derived cells and the amount of CD166-positive cells may affect the repair process of osteochondral defects.
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Furumatsu T, Kanazawa T, Miyake Y, Kubota S, Takigawa M, Ozaki T. Mechanical stretch increases Smad3-dependent CCN2 expression in inner meniscus cells. J Orthop Res 2012; 30:1738-45. [PMID: 22576977 DOI: 10.1002/jor.22142] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 04/20/2012] [Indexed: 02/04/2023]
Abstract
The intrinsic zone-specific properties of the menisci are determined by biomechanical environments. In this study, we examined mechanical stretch-dependent expression of multifunctional growth factor CYR61/CTGF/NOV (CCN) 2, and investigated the role of CCN2 in meniscus cells. Uni-axial cyclic tensile strain (CTS) was applied using a STB-140 system. CTS-induced expression of CCN2 and α1(I) collagen (COL1A1) was assessed by quantitative real-time PCR analysis. The distribution of CCN2 and Smad2/3 in stretched cells was investigated by immunohistochemical analysis. Smad2/3-dependent CCN2 transactivation was measured by luciferase reporter assay. The relationship between Smad2/3 and CTS-induced CCN2 transcription was investigated by chromatin immunoprecipitation. CTS stimulated gene expression of CCN2 and COL1A1 in inner meniscus cells, but not in outer meniscus cells. Recombinant CCN2 increased COL1A1 expression only in inner meniscus cells. CCN2 synthesis and nuclear translocalization of phosphorylated Smad2/3 in inner meniscus cells were stimulated by CTS. The CCN2 promoter activity was synergistically enhanced by overexpressed Smad3 in stretched inner meniscus cells, but was not by Smad2. Chromatin immunoprecipitation revealed that CTS increased the association between Smad3 and the Smad-binding element on the CCN2 proximal promoter in inner meniscus cells. Our results suggest that stretch-induced CCN2 may have a crucial role in regulating COL1A1 expression in the inner meniscus.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, Japan
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Saliken DJ, Mulet-Sierra A, Jomha NM, Adesida AB. Decreased hypertrophic differentiation accompanies enhanced matrix formation in co-cultures of outer meniscus cells with bone marrow mesenchymal stromal cells. Arthritis Res Ther 2012; 14:R153. [PMID: 22726892 PMCID: PMC3446539 DOI: 10.1186/ar3889] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/04/2012] [Accepted: 06/22/2012] [Indexed: 01/05/2023] Open
Abstract
Introduction The main objective of this study was to determine whether meniscus cells from the outer (MCO) and inner (MCI) regions of the meniscus interact similarly to or differently with mesenchymal stromal stem cells (MSCs). Previous study had shown that co-culture of meniscus cells with bone marrow-derived MSCs result in enhanced matrix formation relative to mono-cultures of meniscus cells and MSCs. However, the study did not examine if cells from the different regions of the meniscus interacted similarly to or differently with MSCs. Methods Human menisci were harvested from four patients undergoing total knee replacements. Tissue from the outer and inner regions represented pieces taken from one third and two thirds of the radial distance of the meniscus, respectively. Meniscus cells were released from the menisci after collagenase treatment. Bone marrow MSCs were obtained from the iliac crest of two patients after plastic adherence and in vitro culture until passage 2. Primary meniscus cells from the outer (MCO) or inner (MCI) regions of the meniscus were co-cultured with MSCs in three-dimensional (3D) pellet cultures at 1:3 ratio, respectively, for 3 weeks in the presence of serum-free chondrogenic medium containing TGF-β1. Mono-cultures of MCO, MCI and MSCs served as experimental control groups. The tissue formed after 3 weeks was assessed biochemically, histochemically and by quantitative RT-PCR. Results Co-culture of inner (MCI) or outer (MCO) meniscus cells with MSCs resulted in neo-tissue with increased (up to 2.2-fold) proteoglycan (GAG) matrix content relative to tissues formed from mono-cultures of MSCs, MCI and MCO. Co-cultures of MCI or MCO with MSCs produced the same amount of matrix in the tissue formed. However, the expression level of aggrecan was highest in mono-cultures of MSCs but similar in the other four groups. The DNA content of the tissues from co-cultured cells was not statistically different from tissues formed from mono-cultures of MSCs, MCI and MCO. The expression of collagen I (COL1A2) mRNA increased in co-cultured cells relative to mono-cultures of MCO and MCI but not compared to MSC mono-cultures. Collagen II (COL2A1) mRNA expression increased significantly in co-cultures of both MCO and MCI with MSCs compared to their own controls (mono-cultures of MCO and MCI respectively) but only the co-cultures of MCO:MSCs were significantly increased compared to MSC control mono-cultures. Increased collagen II protein expression was visible by collagen II immuno-histochemistry. The mRNA expression level of Sox9 was similar in all pellet cultures. The expression of collagen × (COL10A1) mRNA was 2-fold higher in co-cultures of MCI:MSCs relative to co-cultures of MCO:MSCs. Additionally, other hypertrophic genes, MMP-13 and Indian Hedgehog (IHh), were highly expressed by 4-fold and 18-fold, respectively, in co-cultures of MCI:MSCs relative to co-cultures of MCO:MSCs. Conclusions Co-culture of primary MCI or MCO with MSCs resulted in enhanced matrix formation. MCI and MCO increased matrix formation similarly after co-culture with MSCs. However, MCO was more potent than MCI in suppressing hypertrophic differentiation of MSCs. These findings suggest that meniscus cells from the outer-vascular regions of the meniscus can be supplemented with MSCs in order to engineer functional grafts to reconstruct inner-avascular meniscus.
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Affiliation(s)
- David Jj Saliken
- Laboratory of Stem Cell Biology and Orthopaedic Tissue Engineering, Department of Surgery, Division of Orthopaedic Surgery, University of Alberta, Edmonton, AB, T6G 2R3, Canada
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Matsumoto E, Furumatsu T, Kanazawa T, Tamura M, Ozaki T. ROCK inhibitor prevents the dedifferentiation of human articular chondrocytes. Biochem Biophys Res Commun 2012; 420:124-9. [DOI: 10.1016/j.bbrc.2012.02.127] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 02/22/2012] [Indexed: 01/13/2023]
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Kanazawa T, Furumatsu T, Hachioji M, Oohashi T, Ninomiya Y, Ozaki T. Mechanical stretch enhances COL2A1 expression on chromatin by inducing SOX9 nuclear translocalization in inner meniscus cells. J Orthop Res 2012; 30:468-74. [PMID: 21853455 DOI: 10.1002/jor.21528] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 07/28/2011] [Indexed: 02/04/2023]
Abstract
The meniscus plays an important role in controlling the biomechanics of the knee. However, the mechanical stress-related response in meniscus cells remains unclear. We investigated mechanical stretch-regulated gene expression in human meniscus cells. Human inner and outer meniscus cells were prepared from the inner and outer halves of the lateral meniscus. The gene expressions of Sry-type HMG box (SOX) 9 and α1(II) collagen (COL2A1) were assessed by real-time PCR analyses after cyclic tensile strain (CTS) treatment (0.5 Hz, 5% stretch). The localization and phosphorylation of SOX9 were evaluated by immunohistochemical and Western blot (WB) analyses. Chromatin immunoprecipitation (IP) analysis was performed to assess the stretch-related protein-DNA complex formation between SOX9 and the COL2A1 enhancer on chromatin. Type II collagen deposition and SOX9 production were detected only in inner menisci. CTS treatments increased expression of the COL2A1 and SOX9 genes in inner meniscus cells, but not in outer meniscus cells. In addition, CTS treatments stimulated nuclear translocalization and phosphorylation of SOX9 in inner meniscus cells. Chromatin IP analyses revealed that CTS increased the association between SOX9 and its DNA-binding site, included in the COL2A1 enhancer, on chromatin. Our results indicate that inner and outer meniscus cells have different properties in mechanical stretch-induced COL2A1 expression. In inner meniscus cells, mechanical stretch may have an essential role in the epigenetic regulation of COL2A1 expression.
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Affiliation(s)
- Tomoko Kanazawa
- Department of Orthopaedic Surgery, Science of Functional Recovery and Reconstruction, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
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Takata N, Furumatsu T, Abe N, Naruse K, Ozaki T. Comparison between loose fragment chondrocytes and condyle fibrochondrocytes in cellular proliferation and redifferentiation. J Orthop Sci 2011; 16:589-97. [PMID: 21739103 DOI: 10.1007/s00776-011-0128-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Accepted: 06/21/2011] [Indexed: 01/13/2023]
Abstract
BACKGROUND Loose fragments in spontaneous osteonecrosis of the knee (SONK) are usually removed by surgical treatment. However, the healing potential of osteonecrotic loose fragments and their clinical availability, for example as a cell source for cartilage repair and tissue engineering, have not been investigated. The objective of this study was to evaluate the cellular proliferation and redifferentiation ability of loose fragment chondrocytes for the treatment of SONK. METHODS Cells were obtained from the remaining cartilage of chondral loose fragments or fibrocartilaginous tissue under the affected femoral condyle in SONK. The proliferation activity of loose fragment-derived chondrocytes and condyle-derived fibrochondrocytes was evaluated. In-vitro differentiation ability was assessed by PCR and histological analysis. RESULTS The deposition of proteoglycans and type II collagen were maintained in loose fragments. However, loose fragment-derived chondrocytes had lower proliferating activity than condyle-derived fibrochondrocytes. Chondrogenic redifferentiation ability was lower in loose fragment chondrocytes than in condyle fibrochondrocytes. Differentiation towards adipogenic and osteogenic lineages was not observed in loose fragment chondrocytes. On the other hand, lipid vacuoles were detected in fibrochondrocytes after adipogenic treatment. CONCLUSIONS This study demonstrated that loose fragment-derived chondrocytes in SONK had lower potential than fibrochondrocytes in cellular proliferation and redifferentiation. Our experimental results suggest that osteonecrotic loose fragments might have restricted cellular properties in the healing of SONK-related osteochondral defects.
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Affiliation(s)
- Naoki Takata
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
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