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Lee CY, Wu MH, Huang TJ, Wang PY, Wu ATH. Hypertrophic Ligamentum Flavum in Lumbar Spine Stenosis Is Associated With the Increased Expression of Secreted Protein Acidic and Rich in Cysteine. Global Spine J 2024; 14:1248-1256. [PMID: 36355427 DOI: 10.1177/21925682221138766] [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: 11/12/2022] Open
Abstract
STUDY DESIGN Basic research. OBJECTIVES Secreted protein acidic and rich in cysteine (SPARC) is a critical pro-fibrotic mediator. This study aims to characterize the role of SPARC in hypertrophic ligamentum flavum (LF) and fibrosis. METHODS Hypertrophic LF samples were obtained from 8 patients with L4/5 lumbar spinal stenosis (LSS) during the decompressive laminectomy. Non-hypertrophic LF from age- and sex-matched 8 patients with L4/5 lumbar disc herniation was selected as control. An in vitro model of fibrosis in human LF cells was established by interleukin 6 (IL-6) to assess SPARC expression. RESULTS Hypertrophic LF samples had higher fibrosis scores than control samples by Masson's trichrome staining (3.6 vs. 1.3, P < .001). Hypertrophic LF samples had significantly more positive staining for collagen and SPARC. Collagen III (Col3), α smooth muscle actin (α-SMA), and SPARC mRNA expression levels were significantly higher in hypertrophic LF samples than in control samples by qPCR. SPARC expression and fibrotic and inflammatory makers (collagen I, Col3, IL-6, interleukin 1β) were significantly upregulated in IL-6 stimulation of normal LF in vitro. CONCLUSION SPARC was detected in human LF and significantly upregulated in the clinical samples of hypertrophic LF compared to their normal counterparts. We also demonstrated an increased level of SPARC in an in vitro fibrosis model of LF. Thus, SPARC could be a crucial biomarker for the pathogenesis of hypertrophic LF and a therapeutic target for LSS.
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Affiliation(s)
- Ching-Yu Lee
- Department of Orthopedics, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- International Ph.D. Program for Cell Therapy and Regeneration Medicine, College of Medicine, Taipei Medical University
| | - Meng-Huang Wu
- Department of Orthopedics, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tsung-Jen Huang
- Department of Orthopedics, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Po-Yao Wang
- Department of Orthopedics, Taipei Medical University Hospital, Taipei, Taiwan
| | - Alexander T H Wu
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei, Taiwan
- The PhD Program of Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
- Clinical Research Center, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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2
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Wawrose RA, Oyekan AA, Tang YM, Chen SR, Chen J, Couch BK, Wang D, Alexander PG, Sowa GA, Vo NV, Lee JY. MicroRNA-29a: a novel target for non-operative management of symptomatic lumbar spinal stenosis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024; 33:892-899. [PMID: 37046075 DOI: 10.1007/s00586-023-07671-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/06/2023] [Accepted: 03/18/2023] [Indexed: 04/14/2023]
Abstract
PURPOSE Lumbar spinal stenosis (LSS) is the most common reason for spinal surgery in patients over the age of 65, and there are few effective non-surgical treatments. Therefore, the development of novel treatment or preventative modalities to decrease overall cost and morbidity associated with LSS is an urgent matter. The cause of LSS is multifactorial; however, a significant contributor is ligamentum flavum hypertrophy (LFH) which causes mechanical compression of the cauda equina or nerve roots. We assessed the role of a novel target, microRNA-29a (miR-29a), in LFH and investigated the potential for using miR-29a as a therapeutic means to combat LSS. METHODS Ligamentum flavum (LF) tissue was collected from patients undergoing decompressive surgery for LSS and assessed for levels of miR-29a and pro-fibrotic protein expression. LF cell cultures were then transfected with either miR-29a over-expressor (agonist) or inhibitor (antagonist). The effects of over-expression and under-expression of miR-29a on expression of pro-fibrotic proteins was assessed. RESULTS We demonstrated that LF at stenotic levels had a loss of miR-29a expression. This was associated with greater LF tissue thickness and higher mRNA levels of collagen I and III. We also demonstrated that miR29-a plays a direct role in the regulation of collagen gene expression in ligamentum flavum. Specifically, agents that increase miR-29a may attenuate LFH, while those that decrease miR-29a promote fibrosis and LFH. CONCLUSION This study demonstrates that miR-29a may potentially be used to treat LFH and provides groundwork to initiate the development of a therapeutic product for LSS.
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Affiliation(s)
- Richard A Wawrose
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anthony A Oyekan
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yunting Melissa Tang
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Stephen R Chen
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joseph Chen
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Brandon K Couch
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dong Wang
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Peter G Alexander
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Gwendolyn A Sowa
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Nam V Vo
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joon Y Lee
- Ferguson Laboratory for Orthopedic and Spine Research, Department of Orthopedic Surgery, University of Pittsburgh, 200 Lothrop Street, E1643 Biomedical Science Tower, Pittsburgh, PA, 15261, USA.
- Pittsburgh Ortho Spine Research (POSR) Group, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
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Pampanella L, Petrocelli G, Abruzzo PM, Zucchini C, Canaider S, Ventura C, Facchin F. Cytochalasins as Modulators of Stem Cell Differentiation. Cells 2024; 13:400. [PMID: 38474364 DOI: 10.3390/cells13050400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Regenerative medicine aims to identify new research strategies for the repair and restoration of tissues damaged by pathological or accidental events. Mesenchymal stem cells (MSCs) play a key role in regenerative medicine approaches due to their specific properties, such as the high rate of proliferation, the ability to differentiate into several cell lineages, the immunomodulatory potential, and their easy isolation with minimal ethical issues. One of the main goals of regenerative medicine is to modulate, both in vitro and in vivo, the differentiation potential of MSCs to improve their use in the repair of damaged tissues. Over the years, much evidence has been collected about the ability of cytochalasins, a large family of 60 metabolites isolated mainly from fungi, to modulate multiple properties of stem cells (SCs), such as proliferation, migration, and differentiation, by altering the organization of the cyto- and the nucleo-skeleton. In this review, we discussed the ability of two different cytochalasins, cytochalasins D and B, to influence specific SC differentiation programs modulated by several agents (chemical or physical) or intra- and extra-cellular factors, with particular attention to human MSCs (hMSCs).
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Affiliation(s)
- Luca Pampanella
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
| | - Giovannamaria Petrocelli
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
| | - Provvidenza Maria Abruzzo
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
| | - Cinzia Zucchini
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
| | - Silvia Canaider
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
| | - Carlo Ventura
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
- National Laboratory of Molecular Biology and Stem Cell Bioengineering of the National Institute of Biostructures and Biosystems (NIBB) c/o Eldor Lab, Via Corticella 183, 40129 Bologna, Italy
| | - Federica Facchin
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Via Massarenti 9, 40138 Bologna, Italy
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Yoshihara T, Morimoto T, Hirata H, Murayama M, Nonaka T, Tsukamoto M, Toda Y, Kobayashi T, Izuhara K, Mawatari M. Mechanisms of tissue degeneration mediated by periostin in spinal degenerative diseases and their implications for pathology and diagnosis: a review. Front Med (Lausanne) 2023; 10:1276900. [PMID: 38020106 PMCID: PMC10645150 DOI: 10.3389/fmed.2023.1276900] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 09/18/2023] [Indexed: 12/01/2023] Open
Abstract
Periostin (POSTN) serves a dual role as both a matricellular protein and an extracellular matrix (ECM) protein and is widely expressed in various tissues and cells. As an ECM protein, POSTN binds to integrin receptors, transduces signals to cells, enabling cell activation. POSTN has been linked with various diseases, including atopic dermatitis, asthma, and the progression of multiple cancers. Recently, its association with orthopedic diseases, such as osteoporosis, osteoarthritis resulting from cartilage destruction, degenerative diseases of the intervertebral disks, and ligament degenerative diseases, has also become apparent. Furthermore, POSTN has been shown to be a valuable biomarker for understanding the pathophysiology of orthopedic diseases. In addition to serum POSTN, synovial fluid POSTN in joints has been reported to be useful as a biomarker. Risk factors for spinal degenerative diseases include aging, mechanical stress, trauma, genetic predisposition, obesity, and metabolic syndrome, but the cause of spinal degenerative diseases (SDDs) remains unclear. Studies on the pathophysiological effects of POSTN may significantly contribute toward the diagnosis and treatment of spinal degenerative diseases. Therefore, in this review, we aim to examine the mechanisms of tissue degeneration caused by mechanical and inflammatory stresses in the bones, cartilage, intervertebral disks, and ligaments, which are crucial components of the spine, with a focus on POSTN.
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Affiliation(s)
- Tomohito Yoshihara
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Tadatsugu Morimoto
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Hirohito Hirata
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Masatoshi Murayama
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Toshihiro Nonaka
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Masatsugu Tsukamoto
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Yu Toda
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Takaomi Kobayashi
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
| | - Kenji Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - Masaaki Mawatari
- Department of Orthopaedic Surgery, Faculty of Medicine, Saga University, Saga, Japan
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Hsu YH, Chen CN, Chang HI, Tsai HL, Chang YH, Cheng IS, Yang YS, Huang KY. Manipulation of osteogenic and adipogenic differentiation of human degenerative disc and ligamentum flavum derived progenitor cells using IL-1β, IL-19, and IL-20. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:3413-3424. [PMID: 37563485 DOI: 10.1007/s00586-023-07878-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 06/22/2023] [Accepted: 07/28/2023] [Indexed: 08/12/2023]
Abstract
PURPOSE To elucidate whether pro-inflammatory cytokines might influence the commitment of intervertebral disc (IVD)- and ligamentum flavum (LF)-derived progenitor cells toward either osteogenesis or adipogenesis, specifically Interleukin-1β (IL-1β), IL-19, and IL-20. METHODS Sixty patients with degenerative spondylolisthesis and lumbar or lumbosacral spinal stenosis were included in the study. Injuries to the spine, infections, and benign or malignant tumors were excluded. From nine patient samples, IVD- and LF-derived cells were isolated after primary culture, and two clinical samples were excluded due to mycoplasma infection. The effects of IL-1β, IL-19, as well as IL-20 in regulating osteogenic and adipogenic differentiation in vitro were investigated. RESULTS Primary IVD- and LF-derived cells were found to have a similar cell morphology and profile of surface markers (CD44, CD90, and CD105) as placenta-derived mesenchymal stem cells (MSCs). Primary IVD/LF cells have a high capacity to differentiate into osteocytes and adipocytes. IL-19 had a tendency to promote adipogenesis. IL-20 inhibited osteogenesis and promoted adipogenesis; IL-1β promoted osteogenesis but inhibited adipogenesis. CONCLUSION IL-1β, IL-19, and IL-20 impact the adipogenic and osteogenic differentiation of IVD-derived and LF-derived cells. Modulating the expression of IL-1β, IL-19, and IL-20 provides a potential avenue for controlling cell differentiation of IVD- and LF-derived cells, which might have beneficial effect for degenerative spondylolisthesis and spinal stenosis.
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Affiliation(s)
- Yu-Hsiang Hsu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Research Center of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Nan Chen
- Department of Biochemical Science and Technology, National Chiayi University, Chiayi City, Taiwan
| | - Hsin-I Chang
- Department of Biochemical Science and Technology, National Chiayi University, Chiayi City, Taiwan
| | - Hui-Ling Tsai
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No. 138, Sheng-Li Road, Tainan, 704, Taiwan
| | - Yu-Hsien Chang
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - I-Szu Cheng
- College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Shiuan Yang
- Education Center, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan, Taiwan
| | - Kuo-Yuan Huang
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No. 138, Sheng-Li Road, Tainan, 704, Taiwan.
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Yabu A, Suzuki A, Hayashi K, Hori Y, Terai H, Orita K, Habibi H, Salimi H, Kono H, Toyoda H, Maeno T, Takahashi S, Tamai K, Ozaki T, Iwamae M, Ohyama S, Imai Y, Nakamura H. Periostin increased by mechanical stress upregulates interleukin-6 expression in the ligamentum flavum. FASEB J 2023; 37:e22726. [PMID: 36583686 DOI: 10.1096/fj.202200917rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 11/13/2022] [Accepted: 12/12/2022] [Indexed: 12/31/2022]
Abstract
Ligamentum flavum (LF) hypertrophy is a major cause of lumbar spinal canal stenosis. Although mechanical stress is thought to be a major factor involved in LF hypertrophy, the exact mechanism by which it causes hypertrophy has not yet been fully elucidated. Here, changes in gene expression due to long-term mechanical stress were analyzed using RNA-seq in a rabbit LF hypertrophy model. In combination with previously reported analysis results, periostin was identified as a molecule whose expression fluctuates due to mechanical stress. The expression and function of periostin were further investigated using human LF tissues and primary LF cell cultures. Periostin was abundantly expressed in human hypertrophied LF tissues, and periostin gene expression was significantly correlated with LF thickness. In vitro, mechanical stress increased gene expressions of periostin, transforming growth factor-β1, α-smooth muscle actin, collagen type 1 alpha 1, and interleukin-6 (IL-6) in LF cells. Periostin blockade suppressed the mechanical stress-induced gene expression of IL-6 while periostin treatment increased IL-6 gene expression. Our results suggest that periostin is upregulated by mechanical stress and promotes inflammation by upregulating IL-6 expression, which leads to LF degeneration and hypertrophy. Periostin may be a pivotal molecule for LF hypertrophy and a promising therapeutic target for lumbar spinal stenosis.
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Affiliation(s)
- Akito Yabu
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akinobu Suzuki
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Kazunori Hayashi
- Department of Orthopedic Surgery, Osaka City Juso Hospital, Osaka, Japan
| | - Yusuke Hori
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hidetomi Terai
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Kumi Orita
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hasibullah Habibi
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hamidullah Salimi
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Kono
- Department of Orthopedic Surgery, Ishikiri Seiki Hospital, Osaka, Japan
| | - Hiromitsu Toyoda
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Takafumi Maeno
- Department of Orthopedic Surgery, Ishikiri Seiki Hospital, Osaka, Japan
| | - Shinji Takahashi
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Koji Tamai
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Tomonori Ozaki
- Department of Orthopedic Surgery, Ishikiri Seiki Hospital, Osaka, Japan
| | - Masayoshi Iwamae
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Shoichiro Ohyama
- Department of Orthopedic Surgery, Nishinomiya Watanabe Hospital, Nishinomiya, Japan
| | - Yuuki Imai
- Division of Integrative Pathophysiology, Proteo-Science Center, Ehime University, Toon, Japan
| | - Hiroaki Nakamura
- Department of Orthopedic Surgery, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
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Xiang Q, Zhao Y, Lin J, Jiang S, Li W. Epigenetic modifications in spinal ligament aging. Ageing Res Rev 2022; 77:101598. [PMID: 35218968 DOI: 10.1016/j.arr.2022.101598] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 02/07/2023]
Abstract
Spinal stenosis is a common degenerative spine disorder in the aged population and the spinal ligament aging is a main contributor to this chronic disease. However, the underlying mechanisms of spinal ligament aging remain unclear. Epigenetics is the study of heritable and reversible changes in the function of a gene or genome that occur without any alteration in the primary DNA sequence. Epigenetic alterations have been demonstrated to play crucial roles in age-related diseases and conditions, and they are recently studied as biomarkers and therapeutic targets in the field of cancer research. The main epigenetic modifications, including DNA methylation alteration, histone modifications as well as dysregulated noncoding RNA modulation, have all been implicated in spinal ligament aging diseases. DNA methylation modulates the expression of critical genes including WNT5A, GDNF, ACSM5, miR-497 and miR-195 during spinal ligament degeneration. Histone modifications widely affect gene expression and obvious histone modification abnormalities have been found in spinal ligament aging. MicroRNAs (miRNAs), long noncoding RNAs (lncRNAs) and circular RNAs (circRNAs) exert crucial regulating effects on spinal ligament aging conditions via targeting various osteogenic or fibrogenic differentiation related genes. To our knowledge, there is no systematic review yet to summarize the involvement of epigenetic mechanisms of spinal ligament aging in degenerative spinal diseases. In this study, we systematically discussed the different epigenetic modifications and their potential functions in spinal ligament aging process.
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Deo D, Marchioni M, Rao P. Mesenchymal Stem/Stromal Cells in Organ Transplantation. Pharmaceutics 2022; 14:pharmaceutics14040791. [PMID: 35456625 PMCID: PMC9029865 DOI: 10.3390/pharmaceutics14040791] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/02/2022] [Accepted: 04/04/2022] [Indexed: 02/07/2023] Open
Abstract
Organ transplantation is essential and crucial for saving and enhancing the lives of individuals suffering from end-stage organ failure. Major challenges in the medical field include the shortage of organ donors, high rates of organ rejection, and long wait times. To address the current limitations and shortcomings, cellular therapy approaches have been developed using mesenchymal stem/stromal cells (MSC). MSC have been isolated from various sources, have the ability to differentiate to important cell lineages, have anti-inflammatory and immunomodulatory properties, allow immunosuppressive drug minimization, and induce immune tolerance towards the transplanted organ. Additionally, rapid advances in the fields of tissue engineering and regenerative medicine have emerged that focus on either generating new organs and organ sources or maximizing the availability of existing organs. This review gives an overview of the various properties of MSC that have enabled its use as a cellular therapy for organ preservation and transplant. We also highlight emerging fields of tissue engineering and regenerative medicine along with their multiple sub-disciplines, underlining recent advances, widespread clinical applications, and potential impact on the future of tissue and organ transplantation.
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Galderisi U, Peluso G, Di Bernardo G. Clinical Trials Based on Mesenchymal Stromal Cells are Exponentially Increasing: Where are We in Recent Years? Stem Cell Rev Rep 2021; 18:23-36. [PMID: 34398443 PMCID: PMC8365566 DOI: 10.1007/s12015-021-10231-w] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2021] [Indexed: 12/16/2022]
Abstract
Mesenchymal stromal cells (MSCs), present in the stromal component of several tissues, include multipotent stem cells, progenitors, and differentiated cells. MSCs have quickly attracted considerable attention in the clinical field for their regenerative properties and their ability to promote tissue homeostasis following injury. In recent years, MSCs mainly isolated from bone marrow, adipose tissue, and umbilical cord—have been utilized in hundreds of clinical trials for the treatment of various diseases. However, in addition to some successes, MSC-based therapies have experienced several failures. The number of new trials with MSCs is exponentially growing; still, complete results are only available for a limited number of trials. This dearth does not help prevent potentially inefficacious and unnecessary clinical trials. Results from unsuccessful studies may be useful in planning new therapeutic approaches to improve clinical outcomes. In order to bolster critical analysis of trial results, we reviewed the state of art of MSC clinical trials that have been published in the last six years. Most of the 416 published trials evaluated MSCs’ effectiveness in treating cardiovascular diseases, GvHD, and brain and neurological disorders, although some trials sought to treat immune system diseases and wounds and to restore tissue. We also report some unorthodox clinical trials that include unusual studies.
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Affiliation(s)
- Umberto Galderisi
- Department of Experimental Medicine, Luigi Vanvitelli Campania University, Naples, Italy.,Center for Biotechnology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, PA, USA.,Genome and Stem Cell Center (GENKÖK), Erciyes University, Kayseri, Turkey
| | | | - Giovanni Di Bernardo
- Department of Experimental Medicine, Luigi Vanvitelli Campania University, Naples, Italy. .,Center for Biotechnology, Sbarro Institute for Cancer Research and Molecular Medicine, Temple University, Philadelphia, PA, USA.
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Takeda H, Nagai S, Ikeda D, Kaneko S, Tsuji T, Fujita N. Collagen profiling of ligamentum flavum in patients with lumbar spinal canal stenosis. J Orthop Sci 2021; 26:560-565. [PMID: 32753253 DOI: 10.1016/j.jos.2020.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/30/2020] [Accepted: 06/24/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND Although several causes of ligamentum flavum (LF) hypertrophy have been identified, the pathomechanisms underlying LF hypertrophy are not fully understood. Because collagen fibers are essential for the maintenance of LF tissues, characterization of the collagen composition of hypertrophied LF may help to elucidate the pathology of lumbar spinal canal stenosis (LCS). This study aimed to determine the association between the collagen composition and LF hypertrophy. METHODS LF tissues were collected from 23 patients who underwent spinal decompression surgery for lumbar disorders. The cross-sectional area of LF was measured using the axial images of lumbar MRI. The expression of each collagen in human surgical samples was evaluated by real-time RT-PCR and immunohistochemical analysis. To investigate the impact of inflammatory cytokines on the expression of each collagen, we treated primary human LF cells with TNF-α or IL-1β. RESULTS Real-time RT-PCR analysis and immunohistochemistry showed that of the 28 types of collagen, collagen type I, III, V, VI, VIII were highly expressed regardless of LF hypertrophy. In addition, we found the moderate correlation between the cross-sectional area of LF and the mRNA expression level of collagen type I, III, and VI. In vitro analysis showed that the mRNA expression of collagen type I, III, V, VI, and VIII was up-regulated by treatment with TNF-α and with IL-1β. CONCLUSION Our results suggested that collagen type I, III, V, VI, and VIII were the main components of the LF extracellular matrix and that collagen type I, III, and VI may serve as useful markers of LF hypertrophy. These findings may contribute to the future development of diagnostic and treatment modalities for LF hypertrophy and even LCS.
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Affiliation(s)
- Hiroki Takeda
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Aichi, Japan; Department of Spine and Spinal Cord, Fujita Health University, Aichi, Japan
| | - Sota Nagai
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Aichi, Japan
| | - Daiki Ikeda
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Aichi, Japan
| | - Shinjiro Kaneko
- Department of Spine and Spinal Cord, Fujita Health University, Aichi, Japan
| | - Takashi Tsuji
- Department of Orthopaedic Surgery, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.
| | - Nobuyuki Fujita
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Aichi, Japan.
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11
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Mesenchyme homeobox 1 mediated-promotion of osteoblastic differentiation is negatively regulated by mir-3064-5p. Differentiation 2021; 120:19-27. [PMID: 34130045 DOI: 10.1016/j.diff.2021.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/16/2021] [Accepted: 05/16/2021] [Indexed: 11/23/2022]
Abstract
Human mesenchymal stem cells (hMSCs) are multipotent cells that can be differentiated into different cell types including osteoblasts. Herein we aimed to assess the regulation of transcription factor mesenchyme homeobox 1 (Meox1) in the osteogenic differentiation of hMSCs and to determine the microRNA which targets on Meox1. Total RNA was extracted from the isolated ligamentum flavum tissue samples and cultured hMSCs, and the expression of Meox1 was assessed by RT-PCR and Western blot assays. Cultured hMSCs were induced towards osteoblastic differentiation, and the osteoblast phenotype was determined by alkaline phosphatase activity and alizarin red staining. The microRNA targeting on the 3'-UTR of Meox1was predicted using bioinformatics tool, and the binding was validated by luciferase and RNA pulldown assays. The osteoblastic differentiation of hMSCs was checked with the knockdown of Meox1 and microRNA inhibitors. Higher expression of Meox1, and lower expression of miR-3064-5p in ossified ligamentum flavum (OLF) tissues were identified. In addition, increased expression along with the osteoblastic differentiation of hMSCs was found. Further research revealed that Meox was a direct target of miR-3064-5p, when the former promoted the differentiation of hMSCs into osteoblasts, the latter significantly suppressed the osteogenesis. The expression of Meox1 increased gradually with the osteoblastic differentiation of hMSCs, during which miR-3064-5p decreased. Meox1 is a direct target of miR-3064-5p, and they both play important roles in the osteogenesis. These findings provide potential target for the development of therapeutic drugs for skeletal system diseases.
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12
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Habibi H, Suzuki A, Hayashi K, Salimi H, Terai H, Hori Y, Tamai K, Orita K, Ohyama S, Yabu A, Maruf MH, Nakamura H. Expression and function of FGF9 in the hypertrophied ligamentum flavum of lumbar spinal stenosis patients. Spine J 2021; 21:1010-1020. [PMID: 33577925 DOI: 10.1016/j.spinee.2021.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 12/23/2020] [Accepted: 02/06/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Ligamentum flavum (LF) hypertrophy plays a dominant role in lumbar spinal stenosis (LSS). A previous study found that fibroblast growth factor 9 (FGF9) was upregulated with mechanical stress in rabbit LF. However, the expression and function of FGF9 are not well understood in human LF. PURPOSE To evaluate FGF9 expression and function in human LF with and without hypertrophy. STUDY DESIGN This study employed a basic research study design utilizing human LF tissue for histological analyses. PATIENT SAMPLES Hypertrophied LF tissue sample from patients with LSS, and nonhypertrophied (control) LFs from patients with lumbar disc herniation or other diseases were obtained during surgery. METHODS LF specimens were histologically analyzed for FGF9 and vascular endothelial growth factor A (VEGF-A) by immunohistochemistry. The number of total and FGF9 immuno-positive cells and blood vessels were counted and compared between LF with and without hypertrophy. For functional analysis, the effect of FGF9 on cell proliferation and migration was examined using a primary cell culture of human LF. RESULTS Histological studies revealed that the total cell number was significantly higher in the LF of patients with LSS than in the LF of control patients. Immunohistochemistry showed that the percentage of FGF9-positive cells was significantly higher in the LF of patients with LSS than in the controls, and it positively correlated with patients' age, regardless of disease. Double immune-positive cells for FGF9 and VEGF-A were often observed in vascular endothelial cells and fibroblasts in the fibrotic area of hypertrophied LF, and the number of double positive vessels was significantly higher in LF of LSS patients than in the LF of controls. Primary cell culture of human LF revealed that FGF9 promoted the proliferation and migration of LF cells. CONCLUSION The present study demonstrated that FGF9 expression is highly upregulated in hypertrophied human LF. FGF9 potentially plays a pivotal role in the process of hypertrophy of LF, which is associated with mechanical stress, through cell proliferation and migration. CLINICAL SIGNIFICANCE The results from this study partially reveal the molecular mechanisms of LF hypertrophy and suggest that FGF9 may be involved in the process of LF degeneration in elderly patients.
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Affiliation(s)
- Hasibullah Habibi
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akinobu Suzuki
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan.
| | - Kazunori Hayashi
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hamidullah Salimi
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hidetomi Terai
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yusuke Hori
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Koji Tamai
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Kumi Orita
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shoichiro Ohyama
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Akito Yabu
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Mohammad Hasib Maruf
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Nakamura
- Department of Orthopedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
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13
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Dzobo K. Recent Trends in Multipotent Human Mesenchymal Stem/Stromal Cells: Learning from History and Advancing Clinical Applications. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2021; 25:342-357. [PMID: 34115524 DOI: 10.1089/omi.2021.0049] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Early cell biology reports demonstrated the presence of cells with stem-like properties in bone marrow, with both hematopoietic and mesenchymal lineages. Over the years, various investigations have purified and characterized mesenchymal stromal/stem cells (MSCs) from different human tissues as cells with multilineage differentiation potential under the appropriate conditions. Due to their appealing characteristics and versatile potentials, MSCs are leveraged in many applications in medicine such as oncology, bioprinting, and as recent as therapeutics discovery and innovation for COVID-19. To date, studies indicate that MSCs have varied differentiation capabilities into different cell types, and demonstrate immunomodulating and anti-inflammatory properties. Different microenvironments or niche for MSCs and their resulting heterogeneity may influence attendant cellular behavior and differentiation capacity. The potential clinical applications of MSCs and exosomes derived from these cells have led to an avalanche of research reports on their properties and hundreds of clinical trials being undertaken. There is ample reason to think, as discussed in this expert review that the future looks bright and promising for MSC research, with many clinical trials under way to ascertain their clinical utility. This review provides a synthesis of the latest advances and trends in MSC research to allow for broad and critically informed use of MSCs. Early observations of the presence of these cells in the bone marrow and their remarkable differentiation capabilities and immunomodulation are also presented.
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Affiliation(s)
- Kevin Dzobo
- International Center for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, Cape Town, South Africa.,Division of Medical Biochemistry and Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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14
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Yagi K, Goto Y, Kato K, Suzuki N, Kondo A, Waseda Y, Mizutani J, Kawaguchi Y, Joyo Y, Waguri-Nagaya Y, Murakami H. p38 Mitogen-Activated Protein Kinase Is Involved in Interleukin-6 Secretion from Human Ligamentum Flavum-Derived Cells Stimulated by Tumor Necrosis Factor-α. Asian Spine J 2020; 15:713-720. [PMID: 33355843 PMCID: PMC8696066 DOI: 10.31616/asj.2020.0425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/04/2020] [Indexed: 12/26/2022] Open
Abstract
Study Design Human ligamentum flavum–derived cells (HFCs) were obtained from surgical samples for a basic experimental study. Purpose We sought to evaluate the inflammatory response of human ligamentum flavum cells to investigate hypertrophic changes occurring in the ligamentum flavum. Overview of Literature Lumbar spinal stenosis (LSS) is a disease commonly observed in the elderly. The number of patients with LSS has increased over time, yet the pathomechanisms of LSS still have not been fully elucidated. One of the clinical features of LSS is hypertrophy of the ligamentum flavum, which results in narrowing of the lumbar spinal canal. Some reports have suggested that ligamentum flavum hypertrophy is associated with inflammation and fibrosis; meanwhile, the p38 mitogen-activated protein (MAP) kinase is involved in the hypertrophy of human ligamentum flavum cells. Methods HFCs were obtained from patients with LSS who underwent surgery. HFCs were stimulated by tumor necrosis factor-α (TNF-α) and a p38 MAP kinase inhibitor, SB203580. Phosphorylation of the p38 MAP kinase was analyzed by western blotting. The concentration of interleukin-6 (IL-6) in the conditioned medium was measured by enzyme-linked immunoassay and IL-6 messenger RNA expression levels were determined by real-time polymerase chain reaction. Results TNF-α induced the phosphorylation of p38 MAP kinase in a time-dependent manner, which was suppressed by the p38 MAP kinase inhibitor, SB203580. TNF-α also stimulated IL-6 release in both a time- and dose-dependent manner. On its own, SB203580 did not stimulate IL-6 secretion from HFCs; however, it dramatically suppressed the degree of IL-6 release stimulated by TNF-α from HFCs. Conclusions This is the first report suggesting that TNF-α stimulates the gene expression and protein secretion of IL-6 via p38 MAP kinase in HFCs. A noted association between tissue hypertrophy and inflammation suggests that the p38 MAP kinase inflammatory pathway may be a therapeutic molecular target for LSS.
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Affiliation(s)
- Kiyoshi Yagi
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuta Goto
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Kenji Kato
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Nobuyuki Suzuki
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Akira Kondo
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuya Waseda
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Jun Mizutani
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yohei Kawaguchi
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuji Joyo
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuko Waguri-Nagaya
- Department of Orthopaedic Surgery, Nagoya City East Medical Center, Nagoya, Japan
| | - Hideki Murakami
- Department of Orthopaedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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15
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Ruiz-Garcia H, Alvarado-Estrada K, Krishnan S, Quinones-Hinojosa A, Trifiletti DM. Nanoparticles for Stem Cell Therapy Bioengineering in Glioma. Front Bioeng Biotechnol 2020; 8:558375. [PMID: 33365304 PMCID: PMC7750507 DOI: 10.3389/fbioe.2020.558375] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 10/19/2020] [Indexed: 12/16/2022] Open
Abstract
Gliomas are a dismal disease associated with poor survival and high morbidity. Current standard treatments have reached a therapeutic plateau even after combining maximal safe resection, radiation, and chemotherapy. In this setting, stem cells (SCs) have risen as a promising therapeutic armamentarium, given their intrinsic tumor homing as well as their natural or bioengineered antitumor properties. The interplay between stem cells and other therapeutic approaches such as nanoparticles holds the potential to synergize the advantages from the combined therapeutic strategies. Nanoparticles represent a broad spectrum of synthetic and natural biomaterials that have been proven effective in expanding diagnostic and therapeutic efforts, either used alone or in combination with immune, genetic, or cellular therapies. Stem cells have been bioengineered using these biomaterials to enhance their natural properties as well as to act as their vehicle when anticancer nanoparticles need to be delivered into the tumor microenvironment in a very precise manner. Here, we describe the recent developments of this new paradigm in the treatment of malignant gliomas.
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Affiliation(s)
- Henry Ruiz-Garcia
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL, United States.,Department of Neurological Surgery, Mayo Clinic, Jacksonville, FL, United States
| | | | - Sunil Krishnan
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL, United States
| | | | - Daniel M Trifiletti
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL, United States.,Department of Neurological Surgery, Mayo Clinic, Jacksonville, FL, United States
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16
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Sun C, Zhang H, Wang X, Liu X. Ligamentum flavum fibrosis and hypertrophy: Molecular pathways, cellular mechanisms, and future directions. FASEB J 2020; 34:9854-9868. [PMID: 32608536 DOI: 10.1096/fj.202000635r] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022]
Abstract
Hypertrophy of ligamentum flavum (LF), along with disk protrusion and facet joints degeneration, is associated with the development of lumbar spinal canal stenosis (LSCS). Of note, LF hypertrophy is deemed as an important cause of LSCS. Histologically, fibrosis is proved to be the main pathology of LF hypertrophy. Despite the numerous studies explored the mechanisms of LF fibrosis at the molecular and cellular levels, the exact mechanism remains unknown. It is suggested that pathophysiologic stimuli such as mechanical stress, aging, obesity, and some diseases are the causative factors. Then, many cytokines and growth factors secreted by LF cells and its surrounding tissues play different roles in activating the fibrotic response. Here, we summarize the current status of detailed knowledge available regarding the causative factors, pathology, molecular and cellular mechanisms implicated in LF fibrosis and hypertrophy, also focusing on the possible avenues for anti-fibrotic strategies.
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Affiliation(s)
- Chao Sun
- Department of Spine Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Han Zhang
- Department of Spine Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Xiang Wang
- Department of Spine Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Xinhui Liu
- Department of Spine Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
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17
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Yang Y, Lin Z, Cheng J, Ding S, Mao WW, Shi S, Liang B, Jiang L. The roles of autophagy in osteogenic differentiation in rat ligamentum fibroblasts: Evidence and possible implications. FASEB J 2020; 34:8876-8886. [PMID: 32510740 DOI: 10.1096/fj.201903216rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 12/27/2022]
Abstract
Autophagy, a macromolecular degradation process, plays a pivotal role in cell differentiation and survival. This study was designed to investigate the role of autophagy in the osteogenic differentiation in ligamentum fibroblasts. Rat ligamentum fibroblasts were isolated from the posterior longitudinal ligament and cultured in osteogenic induction medium. Ultrastructural analysis, immunofluorescence assay, western blot, flow cytometry, and lysosomal activity assessment were performed to determine the presence and activity of autophagy in the cells. The mineralization deposit and osteogenic gene expressions were evaluated to classify the association between autophagy activity and the bone formation ability of the spinal ligament cells. The influence of leptin and endothelin-1 on the autophagy activity was also evaluated. Our study demonstrated that autophagy was present and increased in the ligament cells under osteogenic induction. Inhibition of autophagy with either pharmacologic inhibitors (Bafilomycin A and 3-methyladenine) or Belcin1 (BECN1) knocking down weakened the mineralization capacity, decreased the gene expressions of COL1A1, osteocalcin (Ocn), and runt-related transcription factor 2 (Runx2) in the ligamentum fibroblasts and increased cell apoptosis. The Adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK)-BECN1 autophagic pathway was activated in the osteogenic differentiating ligamentum fibroblasts. Leptin significantly increased the autophagy activity in the ligament cells under osteogenic induction. These discoveries might improve our understanding for the mechanism of ossification of the posterior longitudinal ligament (OPLL) and provide new approaches on the prevention and treatment of this not uncommon disease.
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Affiliation(s)
- Yuehua Yang
- Spine Center, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.,Department of Orthopaedics, Fifth Affiliated Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Zunwen Lin
- Department of Orthopedic Surgery, First Affiliated Hospital, Nanchang University, Jiangxi, P.R. China
| | - Jiangwei Cheng
- Department of Orthopedic Surgery, First Affiliated Hospital, Nanchang University, Jiangxi, P.R. China
| | - Sheng Ding
- Department of Stomatology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Wei-Wei Mao
- Department of Pediatric Neurosurgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Sheng Shi
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, P.R. China
| | - Biru Liang
- Department of Orthopaedics, Fifth Affiliated Hospital, Southern Medical University, Guangzhou, P.R. China
| | - Leisheng Jiang
- Spine Center, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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18
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Szychlinska MA, D'Amora U, Ravalli S, Ambrosio L, Di Rosa M, Musumeci G. Functional Biomolecule Delivery Systems and Bioengineering in Cartilage Regeneration. Curr Pharm Biotechnol 2019; 20:32-46. [PMID: 30727886 DOI: 10.2174/1389201020666190206202048] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/20/2019] [Accepted: 01/21/2019] [Indexed: 12/17/2022]
Abstract
Osteoarthritis (OA) is a common degenerative disease which involves articular cartilage, and leads to total joint disability in the advanced stages. Due to its avascular and aneural nature, damaged cartilage cannot regenerate itself. Stem cell therapy and tissue engineering represent a promising route in OA therapy, in which cooperation of mesenchymal stem cells (MSCs) and three-dimensional (3D) scaffolds contribute to cartilage regeneration. However, this approach still presents some limits such as poor mechanical properties of the engineered cartilage. The natural dynamic environment of the tissue repair process involves a collaboration of several signals expressed in the biological system in response to injury. For this reason, tissue engineering involving exogenous "influencers" such as mechanostimulation and functional biomolecule delivery systems (BDS), represent a promising innovative approach to improve the regeneration process. BDS provide a controlled release of biomolecules able to interact between them and with the injured tissue. Nano-dimensional BDS is the future hope for the design of personalized scaffolds, able to overcome the delivery problems. MSC-derived extracellular vesicles (EVs) represent an attractive alternative to BDS, due to their innate targeting abilities, immunomodulatory potential and biocompatibility. Future advances in cartilage regeneration should focus on multidisciplinary strategies such as modular assembly strategies, EVs, nanotechnology, 3D biomaterials, BDS, mechanobiology aimed at constructing the functional scaffolds for actively targeted biomolecule delivery. The aim of this review is to run through the different approaches adopted for cartilage regeneration, with a special focus on biomaterials, BDS and EVs explored in terms of their delivery potential, healing capabilities and mechanical features.
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Affiliation(s)
- Marta A Szychlinska
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia no. 87, Catania, Italy
| | - Ugo D'Amora
- Institute of Polymers, Composites and Biomaterials, National Research Council, V.le J.F. Kennedy, 54, Mostra d'Oltremare Pad. 20, 80125, Naples, Italy
| | - Silvia Ravalli
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia no. 87, Catania, Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council, V.le J.F. Kennedy, 54, Mostra d'Oltremare Pad. 20, 80125, Naples, Italy
| | - Michelino Di Rosa
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia no. 87, Catania, Italy
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Via S. Sofia no. 87, Catania, Italy
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Andrzejewska A, Lukomska B, Janowski M. Concise Review: Mesenchymal Stem Cells: From Roots to Boost. Stem Cells 2019; 37:855-864. [PMID: 30977255 DOI: 10.1002/stem.3016] [Citation(s) in RCA: 318] [Impact Index Per Article: 63.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/25/2019] [Accepted: 03/31/2019] [Indexed: 12/13/2022]
Abstract
It was shown as long as half a century ago that bone marrow is a source of not only hematopoietic stem cells, but also stem cells of mesenchymal tissues. Then the term "mesenchymal stem cells" (MSCs) was coined in the early 1990s, and more than a decade later, the criteria for defining MSCs have been released by the International Society for Cellular Therapy. The easy derivation from a variety of fetal and adult tissues and undemanding cell culture conditions made MSCs an attractive research object. It was followed by the avalanche of reports from preclinical studies on potentially therapeutic properties of MSCs, such as immunomodulation, trophic support and capability for a spontaneous differentiation into connective tissue cells, and differentiation into the majority of cell types upon specific inductive conditions. Although ontogenesis, niche, and heterogeneity of MSCs are still under investigation, there is a rapid boost of attempts at clinical applications of MSCs, especially for a flood of civilization-driven conditions in so quickly aging societies, not only in the developed countries, but also in the populous developing world. The fields of regenerative medicine and oncology are particularly extensively addressed by MSC applications, in part due to the paucity of traditional therapeutic options for these highly demanding and costly conditions. There are currently almost 1,000 clinical trials registered worldwide at ClinicalTrials.gov, and it seems that we are starting to witness the snowball effect with MSCs becoming a powerful global industry; however, the spectacular effects of MSCs in the clinic still need to be shown. Stem Cells 2019;37:855-864.
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Affiliation(s)
- Anna Andrzejewska
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Barbara Lukomska
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Miroslaw Janowski
- NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland.,Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, Johns Hopkins University, Baltimore, Maryland, USA
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20
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21
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Zhang Q, Wang S, Sheng Y, Zhao S, Jiang Y, Zhou D, Yang H. Downregulation of antidifferentiation noncoding RNA promotes chondrogenic differentiation and calcification of ligamentum flavum‐derived mesenchymal stem cells. J Cell Biochem 2018; 120:3401-3414. [PMID: 30368870 DOI: 10.1002/jcb.27611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/09/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Qiang Zhang
- Department of Orthopaedics The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University Changzhou China
| | - Shenyu Wang
- Department of Orthopaedic Surgery The First Affiliated Hospital of Soochow University Suzhou China
| | - Yifei Sheng
- Department of Orthopaedics The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University Changzhou China
| | - Shujie Zhao
- Department of Orthopaedics The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University Changzhou China
| | - Yuqing Jiang
- Department of Orthopaedics The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University Changzhou China
| | - Dong Zhou
- Department of Orthopaedics The Affiliated Changzhou No. 2 People's Hospital, Nanjing Medical University Changzhou China
| | - Huilin Yang
- Department of Orthopaedic Surgery The First Affiliated Hospital of Soochow University Suzhou China
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22
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Dechsupa S, Yingsakmongkol W, Limthongkul W, Singhatanadgige W, Honsawek S. Relative telomere length and oxidative DNA damage in hypertrophic ligamentum flavum of lumbar spinal stenosis. PeerJ 2018; 6:e5381. [PMID: 30123710 PMCID: PMC6087619 DOI: 10.7717/peerj.5381] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 07/14/2018] [Indexed: 12/27/2022] Open
Abstract
Background Lumbar spinal stenosis (LSS) is a common cause of low back pain with degenerative spinal change in older adults. Telomeres are repetitive nucleoprotein DNA sequences of TTAGGG at the ends of chromosomes. Oxidative stress originates from an imbalance in pro-oxidant and antioxidant homeostasis that results in the production of reactive oxygen species (ROS). The purpose of this study was to investigate relative telomere length (RTL) and oxidative DNA damage in ligamentum flavum (LF) tissue from LSS patients. Methods Forty-eight patients with LSS participated in this study. Genomic DNA from non-hypertrophic and hypertrophic LF tissue were analyzed by real-time polymerase chain reaction for relative telomere length (RTL). 8-hydroxy 2'-deoxygaunosine (8-OHdG) levels were determined by using enzyme-linked immunosorbent assay. We cultivated LF fibroblast cells from patients in different ages (61, 66, and 77 years). After each cultivation cycle, we examined RTL and senescence-associated β-galactosidase (SA-β-gal) expression. Results The hypertrophic LF had significantly lower RTL than non-hypertrophic LF (P = 0.04). The levels of 8-OHdG were significantly higher in hypertrophic LF compared to non-hypertrophic LF (P = 0.02). With advancing cell culture passage, the number of cells in each passage was significantly lower in hypertrophic LF fibroblast cells than non-hypertrophic LF fibroblast cells. When evaluated with SA-β-gal staining, all senescent LF fibroblast cells were observed at earlier passages in hypertrophic LF compared with non-hypertrophic LF fibroblast cells. Discussion Our results showed that patients with LSS displayed an accelerated RTL shortening and high oxidative stress in hypertrophic LF. These findings implied that telomere shortening and oxidative stress may play roles in the pathogenesis of hypertrophic LF in lumbar spinal stenosis.
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Affiliation(s)
- Sinsuda Dechsupa
- Osteoarthritis and Musculoskeleton Research Unit, Department of Biochemistry, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Chulalongkorn University, Bangkok, Thailand
| | - Wicharn Yingsakmongkol
- Department of Orthopaedics, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Chulalongkorn University, Bangkok, Thailand
| | - Worawat Limthongkul
- Department of Orthopaedics, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Chulalongkorn University, Bangkok, Thailand
| | - Weerasak Singhatanadgige
- Department of Orthopaedics, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Chulalongkorn University, Bangkok, Thailand
| | - Sittisak Honsawek
- Osteoarthritis and Musculoskeleton Research Unit, Department of Biochemistry, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Chulalongkorn University, Bangkok, Thailand
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Abstract
STUDY DESIGN Systematic review. OBJECTIVE The aim of this study was to investigate, quantify, compare, and compile the various mesenchymal stem cell (MSC) tissue sources within human spinal tissues to act as a compendium for clinical and research application. SUMMARY OF BACKGROUND DATA Recent years have seen a dramatic increase in academic and clinical understanding of human MSCs. Previously limited to cells isolated from bone marrow, the past decade has illicited the characterization and isolation of human MSCs from adipose, bone marrow, synovium, muscle, periosteum, peripheral blood, umbilical cord, placenta, and numerous other tissues. As researchers explore practical applications of cells in these tissues, the absolute levels of MSCs in specific spinal tissue will be critical to guide future research. METHODS The PubMED, MEDLINE, EMBASE, and Cochrane databases were searched for articles relating to the harvest, characterization, isolation, and quantification of human MSCs from spinal tissues. Selected articles were examined for relevant data, categorized according to type of spinal tissue, and when possible, standardized to facilitate comparisons between sites. RESULTS Human MSC levels varied widely between spinal tissues. Yields for intervertebral disc demonstrated roughly 5% of viable cells to be positive for MSC surface markers. Cartilage endplate cells yielded 18,500 to 61,875 cells/0.8 mm thick sample of cartilage end plate. Ligamentum flavum yielded 250,000 to 500,000 cells/g of tissue. Annulus fibrosus fluorescence activated cell sorting treatment found 29% of cells positive for MSC marker Stro-1. Nucleus pulposus yielded mean tissue samples of 40,584 to 234,137 MSCs per gram of tissue. CONCLUSION Numerous tissues within and surrounding the spine represent a consistent and reliable source for the harvest and isolation of human MSCs. Among the tissues of the spine, the annulus fibrosus and ligamentum flavum each offer considerable levels of MSCs, and may prove comparable to that of bone marrow. LEVEL OF EVIDENCE 5.
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Kristjánsson B, Honsawek S. Mesenchymal stem cells for cartilage regeneration in osteoarthritis. World J Orthop 2017; 8:674-680. [PMID: 28979850 PMCID: PMC5605352 DOI: 10.5312/wjo.v8.i9.674] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/01/2017] [Accepted: 07/03/2017] [Indexed: 02/06/2023] Open
Abstract
Osteoarthritis (OA) is a slowly progressive disease where cartilage of the synovial joint degenerates. It is most common in the elderly where patients experience pain and reduce physical activity. In combination with lack of conventional treatment, patients are often left with no other choices than arthroplasty. Over the last years, multipotent stromal cells have been used in efforts to treat OA. Mesenchymal stem/progenitor cells (MSCs) are stromal cells that can differentiate into bone, fat, and cartilage cells. They reside within bone marrow and fat. MSCs can also be found in synovial joints where they affect the progression of OA. They can be isolated and proliferated in an incubator before being applied in clinical trials. When it comes to treatment, emphasis has hitherto been on autologous MSCs, but allogenic cells from healthy donors are emerging as another source of the cells. The first adaptations of MSCs revolved in the use of cell-rich matrix, delivered as invasive surgical procedure, which resulted in production of hyaline cartilage and fibrocartilage. However, the demand for less invasive delivery of cells has prompted the use of direct intra-articular injections, wherein a large amount of suspended cells are implanted in the cartilage defect.
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Affiliation(s)
- Baldur Kristjánsson
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Sittisak Honsawek
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
- Department of Orthopaedics, Vinai Parkpian Orthopaedic Research Center, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
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Comment on “Controversies about Interspinous Process Devices in the Treatment of Degenerative Lumbar Spine Diseases: Past, Present, and Future”. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6545361. [PMID: 28584819 PMCID: PMC5444032 DOI: 10.1155/2017/6545361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 02/20/2017] [Indexed: 11/17/2022]
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Cao YL, Duan Y, Zhu LX, Zhan YN, Min SX, Jin AM. TGF-β1, in association with the increased expression of connective tissue growth factor, induce the hypertrophy of the ligamentum flavum through the p38 MAPK pathway. Int J Mol Med 2016; 38:391-8. [PMID: 27279555 PMCID: PMC4935458 DOI: 10.3892/ijmm.2016.2631] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 05/26/2016] [Indexed: 01/15/2023] Open
Abstract
Hypertrophy of the ligamentum flavum (LF) is one of the key pathomechanisms of lumbar spinal stenosis (LSS). Transforming growth factor (TGF)-β1 is abundantly expressed in hypertrophied degenerative LF tissues from LSS. However, the molecular mechanisms underling the association between TGF-β1 and LF hypertrophy have not yet been fully elucidated. In this study, we investigated the important role of the mitogen-activated protein kinase (MAPK) pathway in the pathogenesis of LSS by analyzing the expression of connective tissue growth factor (CTGF) and extracellular matrix (ECM) components (collagen I and collagen III) in TGF-β1-treated LF cells. Cell growth assay revealed that TGF-β1, in association with CTGF, enhanced the the proliferation of LF cells, and we found that TGF-β1 also elevated CTGF expression and subsequently enhanced the mRNA expression of collagen I and collagen III. The increased mRNA expression levels of CTGF, collagen I and collagen III were abolished by p38 inhibitors. Both immunofluorescence imaging and western blot analysis of p38 and p-p38 revealed the increased expression and phosphorylation of p38. Silencing the expression of p38 by siRNA in LF cells decreased the protein expression of p38, p-p38 and CTGF, as well as the mRNA expression of CTGF, collagen I and collagen III. Taken together, our findings indicate that TGF-β1, in association with the increased expression of CTGF, contribute to the homeostasis of the ECM and to the hypertrophy of LF through the p38 MAPK pathway.
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Affiliation(s)
- Yan-Lin Cao
- Department of Orthopaedic Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Yang Duan
- Department of Orthopaedic Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Li-Xin Zhu
- Department of Orthopaedic Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Ye-Nan Zhan
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Shao-Xiong Min
- Department of Orthopaedic Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - An-Min Jin
- Department of Orthopaedic Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
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Chiang ER, Ma HL, Wang JP, Liu CL, Chen TH, Hung SC. Multi-lineage differentiation and angiogenesis potentials of pigmented villonodular synovitis derived mesenchymal stem cells--pathological implication. J Orthop Res 2016; 34:395-403. [PMID: 26291329 DOI: 10.1002/jor.23031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 08/11/2015] [Indexed: 02/04/2023]
Abstract
Pigmented villonodular synovitis (PVNS) is a benign tissue proliferation characterized by its hyper-vascularity within the lesion. The true etiology and cell source of this disease entity still remain unclear. Mesenchymal stem cells (MSCs) exist in various tissues of human body. However, it has not been clarified whether MSCs could be isolated from tissue of PVNS. Here, we isolated MSCs from PVNS (PVNS-SCs), and by comparing to the MSCs from normal synovium (Syn-SCs) of the same individual, we investigated whether PVNS-SCs differed in the capacity for multi-differentiation and inducing angiogenesis. We first demonstrated that PVNS-SCs existed in the lesion of PVNS of three individuals. Moreover, we showed PVNS-SCs had better osteogenic differentiation potential than Syn-SCs, whereas Syn-SCs had better capacity for adipogenic and chondrogenic differentiation. By genome-wide analysis of gene expression profile using a complementary DNA microarray and comparing to Syn-SCs, we identified in PVNS-SCs a distinct gene expression profile characterized by up-regulation of genes involved in angiogenesis. In vitro and in vivo studies further confirmed that PVNS-SCs had better capacities for promoting angiogenesis. In summary, the identification of PVNS-SCs in PVNS tissue and their distinct angiogenic potential may help elucidate the underlying etiology of this disease.
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Affiliation(s)
- En-Rung Chiang
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hsiao-Li Ma
- Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jung-Pan Wang
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chien-Lin Liu
- Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tain-Hsiung Chen
- Department of Surgery, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shih-Chieh Hung
- Institute of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Orthopaedics & Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan.,Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Integrative Stem Cell Center, China Medical University, Taichung, Taiwan
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MicroRNA-221 Regulates Hypertrophy of Ligamentum Flavum in Lumbar Spinal Stenosis by Targeting TIMP-2. Spine (Phila Pa 1976) 2016; 41:275-82. [PMID: 26571175 DOI: 10.1097/brs.0000000000001226] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A study of lumbar ligamentum flavum (LF). OBJECTIVE The aim of this study was to identify LF hypertrophy related microRNAs (miRNAs) expression profile and to investigate the role of miRNAs in the development of LF hypertrophy in lumbar spinal stenosis (LSS). SUMMARY OF BACKGROUND DATA Although histologic and biologic literature on LF hypertrophy is available, the pathomechanism is still unknown. Accumulating evidence suggests that microRNAs (miRNAs) participate in many physiologic processes, including cell proliferation, differentiation, and fibrosis, but the role of specific miRNAs involved in LF hypertrophy remains elusive. METHODS An initial screening of LF tissues miRNA expression by miRNA microarray was performed using samples from 10 patients and 10 controls, respectively. Subsequently, differential expression was validated using qRT-PCR. Then, functional analysis of the miRNAs in regulating collagens I and III expression was carried out. Western blotting and luciferase reporter assay were also used to detect the target gene. In addition, the thickness of the LF at the level of the facet joint was measured on axial T1-weighted magnetic resonance images. RESULTS We identified 18 miRNAs that were differentially expressed in patients compared with controls. Following qRT-PCR confirmation, miR-221 was significantly lower in LF tissues of patients than controls. The LF was significantly thicker in patients than that in controls. Bioinformatics target prediction identified tissue inhibitors of matrix metalloproteinase (TIMP)-2 as a putative target of miR-221. Furthermore, luciferase reporter assays demonstrated that miR-221 directly targets TIMP-2 and affects the protein expression of TIMP-2 in fibroblasts isolated from LF. Of note, miR-221 mimic reduced mRNA and protein expression of collagens I and collagen III in fibroblasts isolated from LF. CONCLUSION The downregulation of miR-221 might contribute to LF hypertrophy by promoting collagens I and III expression via the induction of TIMP-2. Our study also underscores the potential of miR-221 as a novel therapeutic target in LSS. LEVEL OF EVIDENCE 3.
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Isolation and Characterization of Human Mesenchymal Stem Cells From Facet Joints and Interspinous Ligaments. Spine (Phila Pa 1976) 2016; 41:E1-7. [PMID: 26555840 DOI: 10.1097/brs.0000000000001178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
STUDY DESIGN A descriptive in vitro study on isolation and differentiation of human mesenchymal stem cells (MSCs) derived from the facet joints and interspinous ligaments. OBJECTIVE To isolate cells from the facet joints and interspinous ligaments and investigate their surface marker profile and differentiation potentials. SUMMARY OF BACKGROUND DATA Lumbar spinal canal stenosis and ossification of the posterior longitudinal ligament are progressive conditions characterized by the hypertrophy and ossification of ligaments and joints within the spinal canal. MSCs are believed to play a role in the advancement of these diseases and the existence of MSCs has been demonstrated within the ligamentum flavum and posterior longitudinal ligament. The aim of this study was to investigate whether these cells could also be found within facet joints and interspinous ligaments. METHODS Samples were harvested from 10 patients undergoing spinal surgery. The MSCs from facet joints and interspinous ligaments were isolated using direct tissue explant technique. Cell surface antigen profilings were performed via flow cytometry. Their lineage differentiation potentials were analyzed. RESULTS The facet joints and interspinous ligaments-derived MSCs have the tri-lineage potential to be differentiated into osteogenic, adipogenic, and chondrogenic cells under appropriate inductions. Flow cytometry analysis revealed both cell lines expressed MSCs markers. Both facet joints and interspinous ligaments-derived MSCs expressed marker genes for osteoblasts, adipocytes, and chondrocytes. CONCLUSION The facet joints and interspinous ligaments may provide alternative sources of MSCs for tissue engineering applications. The facet joints and interspinous ligaments-derived MSCs are part of the microenvironment of the human ligaments of the spinal column and might play a crucial role in the development and progression of degenerative spine conditions.
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Van Pham P, Tran NY, Phan NLC, Vu NB, Phan NK. Vitamin C stimulates human gingival stem cell proliferation and expression of pluripotent markers. In Vitro Cell Dev Biol Anim 2015; 52:218-27. [DOI: 10.1007/s11626-015-9963-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 09/17/2015] [Indexed: 02/08/2023]
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Differentiation of Human Ligamentum Flavum Stem Cells Toward Nucleus Pulposus-Like Cells Induced by Coculture System and Hypoxia. Spine (Phila Pa 1976) 2015; 40:E665-74. [PMID: 25785962 PMCID: PMC4450897 DOI: 10.1097/brs.0000000000000882] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Human ligamentum flavum (LF)-derived stem cells (LFSCs) and nucleus pulposus cells (NPCs) were cocultured under normoxia or hypoxia. OBJECTIVE To isolate and identify human LFSCs and determine whether they can differentiate into NPCs when cocultured with NPCs under hypoxia. SUMMARY OF BACKGROUND DATA Mesenchymal stem cell (MSC)-based therapies have been proposed as a biological treatment for intervertebral disc degeneration. MSCs derived from various tissues are leading candidates for cell-based therapies, but such cells have not been reported in LF. METHODS LF cells were isolated from patient samples and cultured using culture flasks coated with fibronectin, and their identity was confirmed using flow cytometry. The cells were induced to differentiate into osteoblasts, chondrocytes, and adipocytes, and their morphology, immunophenotype, cell proliferation capacity, cell cycle, and expression of stem cell-specific genes were compared with those of bone marrow-MSCs (BM-MSCs) derived from the same patients. NPCs and LFSCs were cocultured in 1-μm-pore-size insert transwell-culture systems under hypoxia (2% O2) or normoxia. CD24 expression was measured by flow cytometry and confocal microscopy assay. On day 14, reverse transcription-polymerase chain reaction was used for comparing the expression of chondrogenic genes (Sox-9, collagen-II, aggrecan) and novel marker genes (KRT19, CA12, FOXF1, HIF-1α) between the 2 groups. RESULTS LFSCs were obtained using the fibronectin differential-adhesion assay. The morphology of LFSCs was altered, and their immunophenotype, multilineage induction, cell proliferation capacity, cell cycle, and stem cell-specific gene expression were closely related-but not identical-to BM-MSCs, CD24 expression was highly significant in the differentiated LFSCs. RT/Real-time polymerase chain reaction revealed that compared with LFSCs grown under normoxia, hypoxia-treated LFSCs expressed higher levels of Sox-9, collagen-II, aggrecan, KRT19, CA12, and HIF-1α genes except FOXF1. CONCLUSION Stem cells were identified in human LF, and LFSCs cocultured with NPCs were successfully differentiated into NP-like cells under hypoxia. This potentially provides new cell candidates for cell-based regenerative medicine and tissue engineering. LEVEL OF EVIDENCE N/A.
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Ligamentum flavum hypertrophy in asymptomatic and chronic low back pain subjects. PLoS One 2015; 10:e0128321. [PMID: 26010138 PMCID: PMC4444243 DOI: 10.1371/journal.pone.0128321] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 04/26/2015] [Indexed: 01/15/2023] Open
Abstract
Purpose To examine ligamentum flavum thickness using magnetic resonance (MR) images to evaluate its association with low back pain symptoms, age, gender, lumbar level, and disc characteristics. Materials and Methods Sixty-three individuals were part of this IRB-approved study: twenty-seven with chronic low back pain, and thirty-six as asymptomatic. All patients underwent MR imaging and computed tomography (CT) of the lumbar spine. The MR images at the mid-disc level were captured and enlarged 800% using a bilinear interpolation size conversion algorithm that allowed for enhanced image quality. Ligamentum flavum thickness was assessed using bilateral medial and lateral measurements. Disc height at each level was measured by the least-distance measurement method in three-dimensional models created by CT images taken of the same subject. Analysis of variance and t-tests were carried out to evaluate the relationship between ligamentum flavum thickness and patient variables. Results Ligamentum flavum thickness was found to significantly increase with older age, lower lumbar level, and chronic low back pain (p < 0.03). No difference in ligamentum flavum thickness was observed between right and left sided measurements, or between male and female subjects. Disc height and both ligamentum flavum thickness measurements showed low to moderate correlations that reached significance (p < 0.01). Additionally, a moderate and significant correlation between disc degeneration grade and ligamentum flavum thickness does exist (p <0.001). Conclusion By measuring ligamentum flavum thickness on MR images at two different sites and comparing degrees of disc degeneration, we found that ligamentum flavum thickness may be closely related to the pathogenesis of pain processes in the spine.
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Angiopoietin-like protein 2 promotes inflammatory conditions in the ligamentum flavum in the pathogenesis of lumbar spinal canal stenosis by activating interleukin-6 expression. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2015; 24:2001-9. [PMID: 25735609 DOI: 10.1007/s00586-015-3835-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 02/05/2015] [Accepted: 02/22/2015] [Indexed: 01/15/2023]
Abstract
PURPOSE Chronic inflammation is thought to cause ligamentum flavum (LF) degeneration and hypertrophy in lumbar spinal canal stenosis (LSCS). Angiopoietin-like protein 2 (Angptl2) is highly expressed in hypertrophied LF. Because Angptl2 regulates interleukin-6 (IL-6) expression in various tissues, we investigated whether IL-6 is expressed in hypertrophied LF and, if so, does Angptl2 induce IL-6 expression in LF fibroblasts. METHODS LF tissue was obtained from LSCS patients and non-LSCS patients. Polymerase chain reaction (PCR) for Angptl2 and IL-6 genes and immunohistochemistry for IL-6 protein were performed in LF tissue. Fibroblasts from LF tissue were used for in vitro experiments. Expression of integrin α5β1 (an Angptl2 receptor) and Angptl2 binding to receptors on LF fibroblasts were examined by fluorescence-activated cell sorter analysis and cell adhesion assays. After Angptl2 recombinant protein treatment, NF-κB activation and IL-6 expression in LF fibroblasts were investigated by immunocytochemistry, PCR, and enzyme-linked immunosorbent assay. RESULTS IL-6 mRNA expression was increased in hypertrophied LF tissue from LSCS patients and positively correlated with LF thickness and Angptl2 mRNA expression. IL-6 protein was highly expressed in LF fibroblasts in hypertrophied LF tissue. In vitro experiments demonstrated integrin α5β1 expression on LF fibroblasts and Angptl2 binding to cells via receptors. Angptl2 stimulation promoted NF-κB nuclear translocation and induced IL-6 expression and secretion in LF fibroblasts. CONCLUSIONS Angptl2 promotes inflammation in LF tissue by activating IL-6 expression, leading to LF degeneration and hypertrophy.
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Human Menstrual Blood-Derived Stem Cell Transplantation for Acute Hind Limb Ischemia Treatment in Mouse Models. Regen Med 2015. [DOI: 10.1007/978-1-4471-6542-2_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Hou XF, Fan DW, Sun CG, Chen ZQ. Recombinant human bone morphogenetic protein-2-induced ossification of the ligamentum flavum in rats and the associated global modification of histone H3. J Neurosurg Spine 2014; 21:334-41. [PMID: 24949905 DOI: 10.3171/2014.4.spine13319] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECT The primary object of this investigation was to study recombinant human bone morphogenetic protein-2 (rhBMP-2)-induced ossification of the ligamentum flavum and associated histone H3 modification in a rat model. In an additional set of studies the authors investigated spinal cord and behavioral changes in the same model. METHODS The authors report on 2 separate sets of studies. A total of 90 rats were used for the 2 sets of studies (45 each); in each study, a lyophilized rhBMP-2 and collagen mixture (20 μg rhBMP-2 and 200 μl collagen) was implanted in the lumbar extradural space in 18 rats; another 18 animals were used for a sham-operation control group and underwent implantation of lyophilized collagen without rhBMP-2 at the same level; an additional 9 animals were used as untreated controls. Lumbar spinal samples were harvested from the rhBMP-2 groups and the shamoperation control groups at 1 week, 3 weeks, and 9 weeks after the operation. Samples were also obtained from untreated controls at the same time points. All samples were scanned using micro-CT and then made into paraffinembedded sections. The sections from the first set of 45 rats were stained using elastica van Gieson and toluidine blue, and the expression of histone modifications (H3K9ac, H3K18ac, H3K4me3, and H3K36me3) and osteogenic transcription factors (osterix, Runx2) was detected by immunohistochemistry. In the second set of studies, hindlimb motor function was assessed at 1 week, 3 weeks, and 9 weeks after surgery. After behavioral evaluation, samples were harvested, scanned using micro-CT, and then made into paraffin-embedded sections. The sections were stained using Luxol fast blue. The expression of NeuN was also detected using immunohistochemistry. RESULTS Ossification was seen in the rhBMP-2 group from 1 week after insertion, and the volume of ossified mass increased at 3 and 9 weeks. There was no ossification seen in the sham-surgery and normal controls. The pathological changes of ossification involved ligament degeneration, cartilage formation, and, finally, bone replacement. Spinal cord evaluation showed a significant decrease in white matter content and number of neurons at 9 weeks after operation in the rhBMP-2-treated group (compared with findings in the sham-surgery and control groups as well as findings at the earlier time points in the rhBMP-2 group). Using immunohistochemical staining, histone modifications (H3K9ac, H3K18ac, H3K4me3, and H3K36me3) and osteogenic transcription factors (osterix, Runx2) all were found to be expressed in the fibrocartilage area of the rat ossified ligamentum flavum samples (rhBMP2 group). CONCLUSIONS This rhBMP-2-induced OLF is a typical endochondral ossification, which is similar to clinical OLF. The compressed spinal cord around the ossification site showed signs of a chronic degenerative process. Histone H3 modifications (H3K9ac, H3K18ac, H3K4me3, and H3K36me3) may play an important role in OLF.
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Affiliation(s)
- Xiao-Fei Hou
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
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Nakamura T, Okada T, Endo M, Kadomatsu T, Taniwaki T, Sei A, Odagiri H, Masuda T, Fujimoto T, Nakamura T, Oike Y, Mizuta H. Angiopoietin-like protein 2 induced by mechanical stress accelerates degeneration and hypertrophy of the ligamentum flavum in lumbar spinal canal stenosis. PLoS One 2014; 9:e85542. [PMID: 24465594 PMCID: PMC3894965 DOI: 10.1371/journal.pone.0085542] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 12/05/2013] [Indexed: 02/06/2023] Open
Abstract
Chronic inflammation and subsequent fibrosis induced by mechanical stress play an important role in ligamentum flavum (LF) hypertrophy and degeneration in patients with lumbar spinal canal stenosis (LSCS). Angiopoietin-like protein 2 (Angptl2) is a chronic inflammatory mediator induced under various pathological conditions and increases the expression of TGF-β1, which is a well-characterized mediator in LF hypertrophy. We investigated whether Angptl2 is induced by mechanical stress, and whether it contributes to LF hypertrophy and degeneration by activating the TGF-β1 signaling cascade. In this study, we investigated human LF tissue and LF fibroblasts isolated from patients who underwent lumbar surgery. We found that Angptl2 was abundantly expressed in fibroblasts of hypertrophied LF tissues at both the mRNA and protein levels. This expression was not only positively correlated with LF thickness and degeneration but also positively correlated with lumbar segmental motion. Our in vitro experiments with fibroblasts from hypertrophied LF tissue revealed that mechanical stretching stress increases the expression and secretion of Angptl2 via activation of calcineurin/NFAT pathways. In hypertrophied LF tissue, expression of TGF-β1 mRNA was also increased and TGF-β1/Smad signaling was activated. Angptl2 expression in LF tissue was positively correlated with the expression of TGF-β1 mRNA, suggesting cooperation between Angptl2 and TGF-β1 in the pathogenesis of LF hypertrophy. In vitro experiments revealed that Angptl2 increased levels of TGF-β1 and its receptors, and also activated TGF-β1/Smad signaling. Mechanical stretching stress increased TGF-β1 mRNA expression, which was partially attenuated by treatment with a calcineurin/NFAT inhibitor or Angptl2 siRNA, indicating that induction of TGF-β1 expression by mechanical stretching stress is partially mediated by Angptl2. We conclude that expression of Angptl2 induced by mechanical stress in LF fibroblasts promotes LF tissue degeneration by activation of TGF-β1/Smad signaling, which results in LF hypertrophy in patients with LSCS.
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Affiliation(s)
- Takayuki Nakamura
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tatsuya Okada
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- * E-mail:
| | - Motoyoshi Endo
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tsuyoshi Kadomatsu
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Takuya Taniwaki
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Akira Sei
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Haruki Odagiri
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Tetsuro Masuda
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | - Toru Fujimoto
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
| | | | - Yuichi Oike
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
- CREST, Japan Science and Technology Agency, Honcho, Kawaguchi, Saitama, Japan
| | - Hiroshi Mizuta
- Department of Orthopaedic Surgery, Faculty of Life Sciences, Kumamoto University, Chuo-ku, Kumamoto, Japan
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Berthelot JM, Le Goff B, Maugars Y. Pathogenesis of hyperostosis: A key role for mesenchymatous cells? Joint Bone Spine 2013; 80:592-6. [PMID: 23731645 DOI: 10.1016/j.jbspin.2013.03.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2013] [Indexed: 01/07/2023]
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Chin S, Furukawa KI, Ono A, Asari T, Harada Y, Wada K, Tanaka T, Inaba W, Mizukami H, Motomura S, Yagihashi S, Ishibashi Y. Immunohistochemical localization of mesenchymal stem cells in ossified human spinal ligaments. Biochem Biophys Res Commun 2013; 436:698-704. [PMID: 23770420 DOI: 10.1016/j.bbrc.2013.06.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 06/06/2013] [Indexed: 02/07/2023]
Abstract
Mesenchymal stem cells (MSCs) have been isolated from various tissues and used for elucidating the pathogenesis of numerous diseases. In our previous in vitro study, we showed the existence of MSCs in human spinal ligaments and hypothesized that these MSCs contributed to the pathogenesis of ossification of spinal ligaments. The purpose of this study was to use immunohistochemical techniques to analyze the localization of MSCs in ossified human spinal ligaments in situ. Ossified (OLF) or non-ossified ligamentum flavum (non-OLF) samples from the thoracic vertebra were obtained from patients who had undergone posterior spinal surgery. Serial sections were prepared from paraffin-embedded samples, and double immunofluorescence staining was performed using antibodies against markers for MSCs (CD73, CD90 and CD105), endothelial cells (CD31), pericytes (α-smooth muscle actin), and chondrocytes (S100). Immunolocalization of MSCs was observed in the perivascular area and collagenous matrix in spinal ligaments. Markers for MSCs and pericytes were co-expressed in the perivascular area. Compared with non-OLF, OLF had a large amount of neovascularization in the fragmented ligament matrix, and a high accumulation of MSCs around blood vessels. The prevalence of MSCs in OLF within collagenous matrix was significantly higher than that in non-OLF. Chondrocytes near the ossification front in OLF also presented expression of MSC markers. MSCs may contribute to the ectopic ossification process of OLF through endochondral ossification.
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Affiliation(s)
- Shunfu Chin
- Department of Pharmacology, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan
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Yasen M, Fei Q, Hutton WC, Zhang J, Dong J, Jiang X, Zhang F. Changes of number of cells expressing proliferation and progenitor cell markers with age in rabbit intervertebral discs. Acta Biochim Biophys Sin (Shanghai) 2013; 45:368-76. [PMID: 23449074 DOI: 10.1093/abbs/gmt019] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Basic knowledge about the normal regeneration process within the intervertebral disc (IVD) is important to the understanding of the underlying biology. The presence of progenitor and stem cells in IVD has been verified. However, changes of number of progenitor and stem cells with age are still unknown. In this study, changes of cell proliferation and progenitor cell markers with age in IVD cells from rabbits of two different ages were investigated using flow cytometry, immunohistochemistry, real-time polymerase chain reaction, and western blot analysis. Proliferating cell nuclear antigen (PCNA) was chosen as a marker for proliferation, and Notch1, Jagged1, C-KIT, CD166 were chosen as stem/progenitor cell markers. Cell cycle analysis showed that cell number in the G2/M phase of the young rabbits was significantly higher than that of mature rabbits. Immunohistochemical staining demonstrated the expression of PCNA, C-KIT, CD166, Notch1, and Jagged1 in both young and mature annulus fibrosus (AF). Protein expressions of these cell markers in the young rabbits were all significantly higher than those in the mature rabbits. The expression levels of PCNA, CD166, C-KIT, Jagged1 were significantly higher in the AF, and PCNA, C-KIT in the nucleus pulposus from young rabbits than those from the mature rabbits. These findings demonstrated that both proliferation and progenitor cells exist in rabbit IVDs and the number of cells expressing proliferation and progenitor cell markers decreases with age in the rabbit IVD cells. Methods that are designed to maintain the endogenous progenitor cells and stimulate their proliferation could be successful in preventing or inhibiting degenerative disc disease.
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Affiliation(s)
- Miersalijiang Yasen
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Tsai CC, Huang TF, Ma HL, Chiang ER, Hung SC. Isolation of mesenchymal stem cells from shoulder rotator cuff: a potential source for muscle and tendon repair. Cell Transplant 2012; 22:413-22. [PMID: 23006509 DOI: 10.3727/096368912x656090] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The self-healing potential of each tissue belongs to endogenous stem cells residing in the tissue; however, there are currently no reports mentioned for the isolation of human rotator cuff-derived mesenchymal stem cells (RC-MSCs) since. To isolate RC-MSCs, minced rotator cuff samples were first digested with enzymes and the single cell suspensions were seeded in plastic culture dishes. Twenty-four hours later, nonadherent cells were removed and the adherent cells were further cultured. The RC-MSCs had fibroblast-like morphology and were positive for the putative surface markers of MSCs, such as CD44, CD73, CD90, CD105, and CD166, and negative for the putative markers of hematopoietic cells, such as CD34, CD45, and CD133. Similar to BM-MSCs, RC-MSCs were demonstrated to have the potential to undergo osteogenic, adipogenic, and chondrogenic differentiation. Upon induction in the defined media, RC-MSCs also expressed lineage-specific genes, such as Runx 2 and osteocalcin in osteogenic induction, PPAR-γ and LPL in adipogenic differentiation, and aggrecan and Col2a1 in chondrogenic differentiation. The multipotent feature of RC-MSCs in the myogenic injury model was further strengthened by the increase in myogenic potential both in vitro and in vivo when compared with BM-MSCs. These results demonstrate the successful isolation of MSCs from human rotator cuffs and encourage the application of RC-MSCs in myogenic regeneration.
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Affiliation(s)
- Chih-Chien Tsai
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
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