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Rindt WD, Krug M, Yamada S, Sennefelder F, Belz L, Cheng WH, Azeem M, Kuric M, Evers M, Leich E, Hartmann TN, Pereira AR, Hermann M, Hansmann J, Mussoni C, Stahlhut P, Ahmad T, Yassin MA, Mustafa K, Ebert R, Jundt F. A 3D bioreactor model to study osteocyte differentiation and mechanobiology under perfusion and compressive mechanical loading. Acta Biomater 2024:S1742-7061(24)00355-6. [PMID: 38969078 DOI: 10.1016/j.actbio.2024.06.041] [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: 03/07/2024] [Revised: 06/25/2024] [Accepted: 06/26/2024] [Indexed: 07/07/2024]
Abstract
Osteocytes perceive and process mechanical stimuli in the lacuno-canalicular network in bone. As a result, they secrete signaling molecules that mediate bone formation and resorption. To date, few three-dimensional (3D) models exist to study the response of mature osteocytes to biophysical stimuli that mimic fluid shear stress and substrate strain in a mineralized, biomimetic bone-like environment. Here we established a biomimetic 3D bone model by utilizing a state-of-art perfusion bioreactor platform where immortomouse/Dmp1-GFP-derived osteoblastic IDG-SW3 cells were differentiated into mature osteocytes. We evaluated proliferation and differentiation properties of the cells on 3D microporous scaffolds of decellularized bone (dBone), poly(L-lactide-co-trimethylene carbonate) lactide (LTMC), and beta-tricalcium phosphate (β-TCP) under physiological fluid flow conditions over 21 days. Osteocyte viability and proliferation were similar on the scaffolds with equal distribution of IDG-SW3 cells on dBone and LTMC scaffolds. After seven days, the differentiation marker alkaline phosphatase (Alpl), dentin matrix acidic phosphoprotein 1 (Dmp1), and sclerostin (Sost) were significantly upregulated in IDG-SW3 cells (p = 0.05) on LTMC scaffolds under fluid flow conditions at 1.7 ml/min, indicating rapid and efficient maturation into osteocytes. Osteocytes responded by inducing the mechanoresponsive genes FBJ osteosarcoma oncogene (Fos) and prostaglandin-endoperoxide synthase 2 (Ptgs2) under perfusion and dynamic compressive loading at 1 Hz with 5 % strain. Together, we successfully created a 3D biomimetic platform as a robust tool to evaluate osteocyte differentiation and mechanobiology in vitro while recapitulating in vivo mechanical cues such as fluid flow within the lacuno-canalicular network. STATEMENT OF SIGNIFICANCE: This study highlights the importance of creating a three-dimensional (3D) in vitro model to study osteocyte differentiation and mechanobiology, as cellular functions are limited in two-dimensional (2D) models lacking in vivo tissue organization. By using a perfusion bioreactor platform, physiological conditions of fluid flow and compressive loading were mimicked to which osteocytes are exposed in vivo. Microporous poly(L-lactide-co-trimethylene carbonate) lactide (LTMC) scaffolds in 3D are identified as a valuable tool to create a favorable environment for osteocyte differentiation and to enable mechanical stimulation of osteocytes by perfusion and compressive loading. The LTMC platform imitates the mechanical bone environment of osteocytes, allowing the analysis of the interaction with other cell types in bone under in vivo biophysical stimuli.
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Affiliation(s)
- Wyonna Darleen Rindt
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany
| | - Melanie Krug
- Department of Musculoskeletal Tissue Regeneration, Orthopedic Clinic König-Ludwig-Haus, University of Würzburg, Würzburg, Germany
| | - Shuntaro Yamada
- Centre of Translational Oral Research (TOR)-Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | | | - Louisa Belz
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany
| | - Wen-Hui Cheng
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany
| | - Muhammad Azeem
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany
| | - Martin Kuric
- Department of Musculoskeletal Tissue Regeneration, Orthopedic Clinic König-Ludwig-Haus, University of Würzburg, Würzburg, Germany
| | | | - Ellen Leich
- Institute of Pathology, University of Würzburg, Würzburg, Germany
| | - Tanja Nicole Hartmann
- Department of Medicine I, Medical Center-University Freiburg, and Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Ana Rita Pereira
- IZKF Group Tissue Regeneration in Musculoskeletal Diseases, University Hospital Würzburg, Würzburg, Germany
| | - Marietta Hermann
- IZKF Group Tissue Regeneration in Musculoskeletal Diseases, University Hospital Würzburg, Würzburg, Germany
| | - Jan Hansmann
- Fraunhofer Institute for Silicate Research ISC, Translational Center Regenerative Therapies, Würzburg, Germany; Department of Electrical Engineering, University of Applied Sciences Würzburg-Schweinfurt, Schweinfurt, Germany
| | - Camilla Mussoni
- Department for Functional Materials in Medicine and Dentistry, Institute of Functional Materials and Biofabrication (IFB), and Bavarian Polymer Institute (BPI), University of Würzburg, Würzburg, Germany
| | - Philipp Stahlhut
- Department for Functional Materials in Medicine and Dentistry, Institute of Functional Materials and Biofabrication (IFB), and Bavarian Polymer Institute (BPI), University of Würzburg, Würzburg, Germany
| | - Taufiq Ahmad
- Department for Functional Materials in Medicine and Dentistry, Institute of Functional Materials and Biofabrication (IFB), and Bavarian Polymer Institute (BPI), University of Würzburg, Würzburg, Germany
| | - Mohammed Ahmed Yassin
- Centre of Translational Oral Research (TOR)-Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Kamal Mustafa
- Centre of Translational Oral Research (TOR)-Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Regina Ebert
- Department of Musculoskeletal Tissue Regeneration, Orthopedic Clinic König-Ludwig-Haus, University of Würzburg, Würzburg, Germany
| | - Franziska Jundt
- Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany.
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Xu J, Wang Q, Li X, Zheng Y, Ji B. Cellular mechanisms of wound closure under cyclic stretching. Biophys J 2023; 122:2404-2420. [PMID: 36966361 PMCID: PMC10322892 DOI: 10.1016/j.bpj.2023.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 02/23/2023] [Accepted: 03/22/2023] [Indexed: 03/27/2023] Open
Abstract
Wound closure is a fundamental process in many physiological and pathological processes, but the regulating effects of external force on the closure process are still unclear. Here, we systematically studied the closure process of wounds of different shape under cyclic stretching. We found that the stretching amplitude and direction had significant effect on the healing speed and healing mode. For instance, there was a biphasic dependence of the healing speed on the stretching amplitude. That is, the wound closure was faster under relatively small and large amplitude, while it was slower under intermediate amplitude. At the same time, the stretching could regulate the healing pattern. We showed that the stretching would increase the healing speed along the direction perpendicular to the stretching direction. Specifically, when the stretching was along the major axis of the wound, it accelerated the healing speed along the short axis, which induced a rosette to stitching-line mode transition. In contrast, stretching along the minor axis accelerated the healing speed along the long axis, inducing a stitching-line to rosette mode transition. Our theoretical analyses demonstrated that the wound closure process was coregulated by the mechanical factors including prestress in the cytoskeleton, the protrusion of cells, and the contraction of the actin ring, as well as the geometry of the wound. The cyclic stretch could further modulate the roles of these factors. For example, the stretching changed the stress field in the cell layer, and switched the direction of cell protrusions. This article reveals important cellular mechanisms of the wound healing process under cyclic stretching, and provides an insight into possible approaches of regulating cell collective behaviors via mechanical forces.
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Affiliation(s)
- Jiayi Xu
- Department of Applied Mechanics, Beijing Institute of Technology, Beijing, China; Wenzhou Key Laboratory of Biophysics, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Qianchun Wang
- Wenzhou Key Laboratory of Biophysics, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Xiaojun Li
- Department of Applied Mechanics, Beijing Institute of Technology, Beijing, China
| | - Yifei Zheng
- Institute of Biomechanics and Applications, Department of Engineering Mechanics, Zhejiang University, Hangzhou, China
| | - Baohua Ji
- Institute of Biomechanics and Applications, Department of Engineering Mechanics, Zhejiang University, Hangzhou, China.
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Ambattu LA, Yeo LY. Sonomechanobiology: Vibrational stimulation of cells and its therapeutic implications. BIOPHYSICS REVIEWS 2023; 4:021301. [PMID: 38504927 PMCID: PMC10903386 DOI: 10.1063/5.0127122] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 02/27/2023] [Indexed: 03/21/2024]
Abstract
All cells possess an innate ability to respond to a range of mechanical stimuli through their complex internal machinery. This comprises various mechanosensory elements that detect these mechanical cues and diverse cytoskeletal structures that transmit the force to different parts of the cell, where they are transcribed into complex transcriptomic and signaling events that determine their response and fate. In contrast to static (or steady) mechanostimuli primarily involving constant-force loading such as compression, tension, and shear (or forces applied at very low oscillatory frequencies (≤ 1 Hz) that essentially render their effects quasi-static), dynamic mechanostimuli comprising more complex vibrational forms (e.g., time-dependent, i.e., periodic, forcing) at higher frequencies are less well understood in comparison. We review the mechanotransductive processes associated with such acoustic forcing, typically at ultrasonic frequencies (> 20 kHz), and discuss the various applications that arise from the cellular responses that are generated, particularly for regenerative therapeutics, such as exosome biogenesis, stem cell differentiation, and endothelial barrier modulation. Finally, we offer perspectives on the possible existence of a universal mechanism that is common across all forms of acoustically driven mechanostimuli that underscores the central role of the cell membrane as the key effector, and calcium as the dominant second messenger, in the mechanotransduction process.
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Affiliation(s)
- Lizebona August Ambattu
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
| | - Leslie Y. Yeo
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne VIC 3000, Australia
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Xiao X, Zou S, Chen J. Cyclic tensile force modifies calvarial osteoblast function via the interplay between ERK1/2 and STAT3. BMC Mol Cell Biol 2023; 24:9. [PMID: 36890454 PMCID: PMC9996996 DOI: 10.1186/s12860-023-00471-8] [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: 12/01/2022] [Accepted: 03/02/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Mechanical therapies, such as distraction osteogenesis, are widely used in dental clinics. During this process, the mechanisms by which tensile force triggers bone formation remain of interest. Herein, we investigated the influence of cyclic tensile stress on osteoblasts and identified the involvement of ERK1/2 and STAT3. MATERIALS AND METHODS Rat clavarial osteoblasts were subjected to tensile loading (10% elongation, 0.5 Hz) for different time periods. RNA and protein levels of osteogenic markers were determined using qPCR and western blot after inhibition of ERK1/2 and STAT3. ALP activity and ARS staining revealed osteoblast mineralization capacity. The interaction between ERK1/2 and STAT3 was investigated by immunofluorescence, western blot, and Co-IP. RESULTS The results showed that tensile loading significantly promoted osteogenesis-related genes, proteins and mineralized nodules. In loading-induced osteoblasts, inhibition of ERK1/2 or STAT3 decreased osteogenesis-related biomarkers significantly. Moreover, ERK1/2 inhibition suppressed STAT3 phosphorylation, and STAT3 inhibition disrupted the nuclear translocation of pERK1/2 induced by tensile loading. In the non-loading environment, inhibition of ERK1/2 hindered osteoblast differentiation and mineralization, while STAT3 phosphorylation was elevated after ERK1/2 inhibition. STAT3 inhibition also increased ERK1/2 phosphorylation, but did not significantly affect osteogenesis-related factors. CONCLUSION Taken together, these data suggested that ERK1/2 and STAT3 interacted in osteoblasts. ERK1/2-STAT3 were sequentially activated by tensile force loading, and both affected osteogenesis during the process.
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Affiliation(s)
- Xiaoyue Xiao
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Chongqing Key Laboratory of Oral Disease and Biomedical Sciences, Stomatological Hospital of Chongqing Medical University, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing, China
| | - Shujuan Zou
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jianwei Chen
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Changes in interstitial fluid flow, mass transport and the bone cell response in microgravity and normogravity. Bone Res 2022; 10:65. [PMID: 36411278 PMCID: PMC9678891 DOI: 10.1038/s41413-022-00234-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 08/17/2022] [Accepted: 08/29/2022] [Indexed: 11/22/2022] Open
Abstract
In recent years, our scientific interest in spaceflight has grown exponentially and resulted in a thriving area of research, with hundreds of astronauts spending months of their time in space. A recent shift toward pursuing territories farther afield, aiming at near-Earth asteroids, the Moon, and Mars combined with the anticipated availability of commercial flights to space in the near future, warrants continued understanding of the human physiological processes and response mechanisms when in this extreme environment. Acute skeletal loss, more severe than any bone loss seen on Earth, has significant implications for deep space exploration, and it remains elusive as to why there is such a magnitude of difference between bone loss on Earth and loss in microgravity. The removal of gravity eliminates a critical primary mechano-stimulus, and when combined with exposure to both galactic and solar cosmic radiation, healthy human tissue function can be negatively affected. An additional effect found in microgravity, and one with limited insight, involves changes in dynamic fluid flow. Fluids provide the most fundamental way to transport chemical and biochemical elements within our bodies and apply an essential mechano-stimulus to cells. Furthermore, the cell cytoplasm is not a simple liquid, and fluid transport phenomena together with viscoelastic deformation of the cytoskeleton play key roles in cell function. In microgravity, flow behavior changes drastically, and the impact on cells within the porous system of bone and the influence of an expanding level of adiposity are not well understood. This review explores the role of interstitial fluid motion and solute transport in porous bone under two different conditions: normogravity and microgravity.
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Lin S, Li J, Shao J, Zhang J, He X, Huang D, Dong L, Lin J, Weng W, Cheng K. Anisotropic magneto-mechanical stimulation on collagen coatings to accelerate osteogenesis. Colloids Surf B Biointerfaces 2021; 210:112227. [PMID: 34838419 DOI: 10.1016/j.colsurfb.2021.112227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 11/08/2021] [Accepted: 11/14/2021] [Indexed: 01/08/2023]
Abstract
Mechanical stimulation has been considered to be critical to cellular response and tissue regeneration. However, harnessing the direction of mechanical stimulation during osteogenesis still remains a challenge. In this study, we designed a series of novel magnetized collagen coatings (MCCs) (randomly or parallel-oriented collagen fibers) to exert the anisotropic mechanical stimulation using oriented magnetic actuation during osteogenesis. Strikingly, we found the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) were significantly up-regulated when the direction of magnetic actuation was parallel to the randomly-oriented collagen coating surface, in contrast to the down-regulated capacity under the perpendicular magnetic actuation. Moreover, further exerting a parallel mechanical stimulation along the parallel-oriented collagen coating, which cells have been oriented by the oriented collagens, were not only able to up-regulate the osteogenic differentiation of BMSCs but also promote the new bone formation during osteogenesis in vivo. We also demonstrated the anisotropic magneto-mechanical stimulation for the osteogenic differences might be attributed to the stretching or bending tensile status of collagen fibers controlled by the direction of magnetic actuation, driving the α5β1-dependent integrin signaling cascade. This study therefore got insight of understanding the directional mechanical stimulation on osteogenesis, and also paved a way for sustaining regulation of the biomaterials-host interface.
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Affiliation(s)
- Suya Lin
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China
| | - Juan Li
- The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jiaqi Shao
- The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jiamin Zhang
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China
| | - Xuzhao He
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China
| | - Donghua Huang
- Department of Orthopaedic Surgery, the Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Lingqing Dong
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jun Lin
- The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China.
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China
| | - Kui Cheng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Center of Rehabilitation Biomedical Materials, Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China; Department of Rehabilitation Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China.
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Xun J, Li C, Liu M, Mei Y, Zhou Q, Wu B, Xie F, Liu Y, Dai R. Serum exosomes from young rats improve the reduced osteogenic differentiation of BMSCs in aged rats with osteoporosis after fatigue loading in vivo. Stem Cell Res Ther 2021; 12:424. [PMID: 34315544 PMCID: PMC8314589 DOI: 10.1186/s13287-021-02449-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/06/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Osteoporosis is a major public health concern for the elderly population and is characterized by fatigue load resulting in bone microdamage. The ability of bone mesenchymal stem cells (BMSCs) to repair bone microdamage diminishes with age, and the accumulation of bone microdamage increases the risk of osteoporotic fracture. There is a lack of effective means to promote the repair of bone microdamage in aged patients with osteoporosis. Exosomes have been shown to be related to the osteogenic differentiation of BMSCs. Here, we aimed to evaluate the changes in the osteogenic differentiation capacity of BMSCs in aged osteoporotic rats after fatigue loading and the treatment potential of serum exosomes from young rats. METHODS The tibias of six aged osteoporotic rats were subjected to fatigue loading in vivo for 2 weeks, and the bone microdamage, microstructures, and mechanical properties were assessed. Subsequently, BMSCs were extracted to evaluate their proliferation and osteogenic differentiation abilities. In addition, the BMSCs of aged osteoporotic rats after fatigue loading were treated with serum exosomes from young rats under osteogenic induction conditions, and the expression of osteogenic-related miRNAs was quantified. The osteogenetic effects of miRNA-19b-3p in exosomes and the possible target protein PTEN was detected. RESULTS Obvious bone microdamage at the fatigue load stress point, the bone microstructure and biomechanical properties were not obviously changed. A decreased osteogenic differentiation ability of BMSCs was observed after fatigue loading, while serum exosomes from young rats highly expressing miRNA-19b-3p improved the decreased osteogenic differentiation ability of BMSCs. Transfection with miRNA-19b-3p mimic could promote osteoblastic differentiation of BMSCs and decreased the expression of PTEN. After transfection of miRNA-19b-3p inhibitor, the promotional effect of exosomes on bone differentiation was weakened. Treatment with transfected exosomes increased the expression of PTEN. CONCLUSION Serum exosomes derived from young rats can improve the decreased osteogenic differentiation ability of BMSCs in aged rats with osteoporosis after fatigue loading and can provide a new treatment strategy for the repair of bone microdamage and prevention of fractures.
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Affiliation(s)
- Jingqiong Xun
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- Department of Endocrinology, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
| | - Chan Li
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Meilu Liu
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yueming Mei
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Qiongfei Zhou
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Bo Wu
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Fen Xie
- Department of Endocrinology, Xiangtan Central Hospital, Xiangtan, Hunan, China
| | - Yuling Liu
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Ruchun Dai
- National Clinical Research Center for Metabolic Diseases, Institute of Metabolism and Endocrinology, Central South University, Hunan Provincial Key Laboratory of Metabolic Bone Diseases, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China.
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Liu B, Han S, Modarres-Sadeghi Y, Lynch ME. Multiphysics simulation of a compression-perfusion combined bioreactor to predict the mechanical microenvironment during bone metastatic breast cancer loading experiments. Biotechnol Bioeng 2021; 118:1779-1792. [PMID: 33491767 DOI: 10.1002/bit.27692] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 01/15/2021] [Accepted: 01/22/2021] [Indexed: 01/12/2023]
Abstract
Incurable breast cancer bone metastasis causes widespread bone loss, resulting in fragility, pain, increased fracture risk, and ultimately increased patient mortality. Increased mechanical signals in the skeleton are anabolic and protect against bone loss, and they may also do so during osteolytic bone metastasis. Skeletal mechanical signals include interdependent tissue deformations and interstitial fluid flow, but how metastatic tumor cells respond to each of these individual signals remains underinvestigated, a barrier to translation to the clinic. To delineate their respective roles, we report computed estimates of the internal mechanical field of a bone mimetic scaffold undergoing combinations of high and low compression and perfusion using multiphysics simulations. Simulations were conducted in advance of multimodal loading bioreactor experiments with bone metastatic breast cancer cells to ensure that mechanical stimuli occurring internally were physiological and anabolic. Our results show that mechanical stimuli throughout the scaffold were within the anabolic range of bone cells in all loading configurations, were homogenously distributed throughout, and that combined high magnitude compression and perfusion synergized to produce the largest wall shear stresses within the scaffold. These simulations, when combined with experiments, will shed light on how increased mechanical loading in the skeleton may confer anti-tumorigenic effects during metastasis.
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Affiliation(s)
- Boyuan Liu
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts, USA
| | - Suyue Han
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts, USA
| | - Yahya Modarres-Sadeghi
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts, USA
| | - Maureen E Lynch
- Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, Massachusetts, USA.,Department of Mechanical Engineering, University of Colorado, Boulder, Colorado, USA
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Uniaxial Static Strain Promotes Osteoblast Proliferation and Bone Matrix Formation in Distraction Osteogenesis In Vitro. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3906426. [PMID: 32855965 PMCID: PMC7443025 DOI: 10.1155/2020/3906426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/24/2020] [Accepted: 07/27/2020] [Indexed: 11/18/2022]
Abstract
Objective We aimed at investigating the effects of uniaxial static strain on osteoblasts in distraction osteogenesis (DO). Methods To simulate the mechanical stimulation of osteoblasts during DO, 10% uniaxial static strain was applied to osteoblasts using a homemade multiunit cell stretching and compressing device. Before and after applying strain stimulation, the morphological changes of osteoblasts were observed by inverted phase-contrast microscopy, Coomassie blue staining, and immunofluorescence. Alkaline phosphatase (ALP) activity, mRNA levels (proliferating cell nuclear antigen [PCNA], ALP, Runx2, osteocalcin [OCN], collagen type I, hypoxia-inducible factor- [HIF-] 1α, and vascular endothelial growth factor [VEGF]), and protein levels (Runx2, OCN, collagen type I, HIF-1α, and VEGF) were evaluated by using ALP kit, real-time quantitative reverse transcription-polymerase chain reaction, western blot, and enzyme-linked immunosorbent assay. Results After the mechanical stimulation, the cytoskeleton microfilaments were rearranged, and the cell growth direction of the osteoblasts became ordered, with their direction being at an angle of about 45° from the direction of strain. The proliferation of osteoblasts and the expression levels of mRNA and protein of ALP, Runx2, OCN, collagen type I, HIF-1α, and VEGF were significantly higher than in the nonstretch control groups. Conclusion Our homemade device can exert uniaxial static strain and promote the proliferation of osteoblasts and bone matrix formation. It can be used to simulate the mechanical stimulation of osteoblasts during DO.
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Luo Y, Ge R, Wu H, Ding X, Song H, Ji H, Li M, Ma Y, Li S, Wang C, Du H. The osteogenic differentiation of human adipose-derived stem cells is regulated through the let-7i-3p/LEF1/β-catenin axis under cyclic strain. Stem Cell Res Ther 2019; 10:339. [PMID: 31753039 PMCID: PMC6873506 DOI: 10.1186/s13287-019-1470-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 10/16/2019] [Accepted: 10/23/2019] [Indexed: 02/06/2023] Open
Abstract
Background The Wnt/β-catenin pathway is involved in the osteogenic differentiation of human adipose-derived stem cells (hASCs) under cyclic strain. Very little is known about the role of microRNAs in these events. Methods Cells were obtained using enzyme digestion methods, and proliferation was detected using Cell Counting Kit 8. Cell cycles and immunophenotypes were detected by flow cytometry. The multilineage potential of hASCs was induced by induction media. Cyclic strain was applied to hASCs (0.5 Hz, 2 h/day, 6 days) to induce osteogenic differentiation and miRNA changes. Bioinformatic and dual-luciferase analyses confirmed lymphoid enhancer factor 1 (LEF1) as a potential target of let-7i-3p. The effect of let-7i-3p on LEF1 in hASCs transfected with a let-7i-3p mimic and inhibitor was analyzed by immunofluorescence. hASCs were transfected with a let-7i-3p mimic, inhibitor, or small interfering RNA (siRNA) against LEF1 and β-catenin. Quantitative real-time PCR (qPCR) and western blotting were performed to examine the osteogenic markers and Wnt/β-catenin pathway at the mRNA and protein levels, respectively. Immunofluorescence and western blotting were performed to confirm the activation of the Wnt/β-catenin pathway. Results Flow cytometry showed that 82.12% ± 5.83% of the cells were in G1 phase and 17.88% ± 2.59% of the cells were in S/G2 phase; hASCs were positive for CD29, CD90, and CD105. hASCs could have the potential for osteogenic, chondrogenic, and adipogenic differentiation. MicroRNA screening via microarray showed that let-7i-3p expression was decreased under cyclic strain. Bioinformatic and dual-luciferase analyses confirmed that LEF1 in the Wnt/β-catenin pathway was the target of let-7i-3p. Under cyclic strain, the osteogenic differentiation of hASCs was promoted by overexpression of LEF1and β-catenin and inhibited by overexpression of let-7i-3p. hASCs were transfected with let-7i-3p mimics and inhibitor. Gain- or loss-of-function analyses of let-7i-3p showed that the osteogenic differentiation of hASCs was promoted by decreased let-7i-3p expression and inhibited by increased let-7i-3p expression. Furthermore, high LEF1 expression inactivated the Wnt/β-catenin pathway in let-7i-3p-enhanced hASCs. In contrast, let-7i-3p inhibition activated the Wnt/β-catenin pathway. Conclusions Let-7i-3p, acting as a negative regulator of the Wnt/β-catenin pathway by targeting LEF1, inhibits the osteogenic differentiation of hASCs under cyclic strain in vitro.
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Affiliation(s)
- Yadong Luo
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Ran Ge
- Department of Nuclear Medicine, Fujian Medical University Union Hospital, Fuzhou, 350001, Fujian Province, People's Republic of China
| | - Heming Wu
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Xu Ding
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Haiyang Song
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Huan Ji
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Meng Li
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Yunan Ma
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Sheng Li
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Chenxing Wang
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China.,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China
| | - Hongming Du
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Nanjing Medical University, Hanzhong Road No.136, Nanjing, 210029, Jiangsu Province, People's Republic of China. .,Oral Disease Key Laboratory of Jiangsu Province, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, People's Republic of China.
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11
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Feng Y, Wu J, Cheng Z, Zhang J, Lu J, Shi R. Mechanical stretch enhances sex steroidogenesis in C 2C 12 skeletal muscle cells. Steroids 2019; 150:108434. [PMID: 31278919 DOI: 10.1016/j.steroids.2019.108434] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/19/2019] [Accepted: 07/01/2019] [Indexed: 10/26/2022]
Abstract
Skeletal muscle contains estrogens and estrogen synthesis-related enzymes. However, it has not been reported whether myoblasts cultured in vitro also express these enzymes. The purpose of the current study was to address these issues and to explore the effects of mechanical stretch on the enzyme system. The in vitro cultured C2C12 mouse myoblasts were divided into the control, stretch, testosterone and stretch plus testosterone groups. Cells in the stretch and stretch plus testosterone groups were mechanically stretched with the Flexercell cell stress loading device at an amplitude of 10% and in a frequency of 0.5 Hz for 8 h. Cells in the testosterone and stretch plus testosterone groups were incubated with 100 nM testosterone for 24 h before distraction. Following the treatments, cell proliferation and estradiol levels, as well as the expressions of 17β-hydroxysteroid (17β-HSD), 3β-hydroxysteroid (3β-HSD) and aromatase were analyzed. Compared to the control, the cell proliferation in all experimental groups increased significantly, the estradiol levels in the mechanically stretched groups were significantly higher, and, moreover, the estradiol levels were positively correlated with the cell proliferation (r = 0.615, p < 0.01). Additionally, analyses of aromatase protein and mRNA showed that, compared to the control, their levels were significantly increased upon stretching and testosterone exposure. Similarly, the protein and mRNA levels of both 3β-HSD and 17β-HSD in the stretched cells differed significantly from the control. In the presence of aromatase and 5α-reductase inhibitors, the protein and mRNA levels of these enzymes altered significantly compared to the control. Conclusions: Steroid synthases were detected in the C2C12 myoblasts cultured in vitro, the synthesized estrogen was closely related to the cell proliferation, and mechanical stretch was the external factor that affected the expression of the estrogen synthesis-related enzymes.
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Affiliation(s)
- Yu Feng
- School of Kinesiology, Shanghai University of Sport, 188 Hengren Road, Shanghai 200438, China
| | - Jiaxi Wu
- Central Laboratories, Xuhui Central Hospital, Shanghai Clinical Research Center, Chinese Academy of Sciences, 966 Huaihai Middle Road, Shanghai 200031, China
| | - Zepeng Cheng
- School of Kinesiology, Shanghai University of Sport, 188 Hengren Road, Shanghai 200438, China
| | - Jin Zhang
- School of Kinesiology, Shanghai University of Sport, 188 Hengren Road, Shanghai 200438, China
| | - Jianqiang Lu
- School of Kinesiology, Shanghai University of Sport, 188 Hengren Road, Shanghai 200438, China
| | - Rengfei Shi
- School of Kinesiology, Shanghai University of Sport, 188 Hengren Road, Shanghai 200438, China.
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12
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Schreivogel S, Kuchibhotla V, Knaus P, Duda GN, Petersen A. Load-induced osteogenic differentiation of mesenchymal stromal cells is caused by mechano-regulated autocrine signaling. J Tissue Eng Regen Med 2019; 13:1992-2008. [PMID: 31359634 DOI: 10.1002/term.2948] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 06/28/2019] [Accepted: 07/19/2019] [Indexed: 12/12/2022]
Abstract
Mechanical boundary conditions critically influence the bone healing process. In this context, previous in vitro studies have demonstrated that cyclic mechanical compression alters migration and triggers osteogenesis of mesenchymal stromal cells (MSC), both processes being relevant to healing. However, it remains unclear whether this mechanosensitivity is a direct consequence of cyclic compression, an indirect effect of altered supply or a specific modulation of autocrine bone morphogenetic protein (BMP) signaling. Here, we investigate the influence of cyclic mechanical compression (ε = 5% and 10%, f = 1 Hz) on human bone marrow MSC (hBMSC) migration and osteogenic differentiation in a 3D biomaterial scaffold, an in vitro system mimicking the mechanical environment of the early bone healing phase. The open-porous architecture of the scaffold ensured sufficient supply even without cyclic compression, minimizing load-associated supply alterations. Furthermore, a large culture medium volume in relation to the cell number diminished autocrine signaling. Migration of hBMSCs was significantly downregulated under cyclic compression. Surprisingly, a decrease in migration was not associated with increased osteogenic differentiation of hBMSCs, as the expression of RUNX2 and osteocalcin decreased. In contrast, BMP2 expression was significantly upregulated. Enabling autocrine stimulation by increasing the cell-to-medium ratio in the bioreactor finally resulted in a significant upregulation of RUNX2 in response to cyclic compression, which could be reversed by rhNoggin treatment. The results indicate that osteogenesis is promoted by cyclic compression when cells condition their environment with BMP. Our findings highlight the importance of mutual interactions between mechanical forces and BMP signaling in controlling osteogenic differentiation.
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Affiliation(s)
- Sophie Schreivogel
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Berlin-Brandenburg Center and School for Regenerative Therapies, Berlin, Germany
| | | | - Petra Knaus
- Berlin-Brandenburg Center and School for Regenerative Therapies, Berlin, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Berlin-Brandenburg Center and School for Regenerative Therapies, Berlin, Germany
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Ansgar Petersen
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Berlin-Brandenburg Center and School for Regenerative Therapies, Berlin, Germany
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
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13
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Ventilation-Like Mechanical Strain Modulates the Inflammatory Response of BEAS2B Epithelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:2769761. [PMID: 31320981 PMCID: PMC6607724 DOI: 10.1155/2019/2769761] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/29/2019] [Accepted: 05/28/2019] [Indexed: 01/16/2023]
Abstract
Protective mechanical ventilation is aimed at preventing ventilator-induced lung injury while ensuring sufficient gas exchange. A new approach focuses on the temporal profile of the mechanical ventilation. We hypothesized that the temporal mechanical strain profile modulates inflammatory signalling. We applied cyclic strain with various temporal profiles to human bronchial epithelial cells (BEAS2B) and assessed proinflammatory response. The cells were subjected to sinusoidal, rectangular, or triangular strain profile and rectangular strain profile with prestrain set to 0, 25, 50, or 75% of the maximum stain, static strain, and strain resembling a mechanical ventilation-like profile with or without flow-controlled expiration. The BEAS2B response to mechanical load included altered mitochondrial activity, increased superoxide radical levels, NF-kappaB translocation, and release of interleukin-8. The response to strain was substantially modulated by the dynamics of the stimulation pattern. The rate of dynamic changes of the strain profile correlates with the degree of mechanical stress-induced cell response.
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14
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Liu L, Shi Q, Chen Q, Li Z. Mathematical modeling of bone in-growth into undegradable porous periodic scaffolds under mechanical stimulus. J Tissue Eng 2019; 10:2041731419827167. [PMID: 30834099 PMCID: PMC6396048 DOI: 10.1177/2041731419827167] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 01/09/2019] [Indexed: 01/20/2023] Open
Abstract
Undegradable scaffolds, as a key element in bone tissue engineering, prevail in the present clinical applications, and the bone in-growth into such scaffolds under mechanical stimulus is an important issue to evaluate the bone-repair effect. This work aims to develop a mathematical framework to investigate the effect of mechanical stimulus on the bone in-growth into undegradable scaffolds. First, the osteoclast and osteoblast activities were coupled by their autocrine and paracrine effects. Second, the mechanical stimulus was empirically incorporated into the coupling cell activities on the basis of experimental observations. Third, the effect of mechanical stimulus including intensity and duration on the bone in-growth process was numerically studied; moreover, the homeostasis of scaffold–bone system under the mechanical stimulus was also treated. The results showed that the numbers of osteoblasts and osteoclasts in the scaffold–bone system tended to constants representing the system homeostasis. Both the mechanical intensity and duration optimized the final bone formation. The numerical results of the bone formation were comparable to the experimental results in rats. The findings from this modeling study could be used to explain many physiological phenomena and clinical observations. The developed model integrates both cell and tissue scales, which can be used as a platform to investigate bone remodeling under mechanical stimulus.
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Affiliation(s)
- Lingze Liu
- Biomechanics Laboratory, School of Biological Science & Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Quan Shi
- Biomechanics Laboratory, School of Biological Science & Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Qiang Chen
- Biomechanics Laboratory, School of Biological Science & Medical Engineering, Southeast University, Nanjing, P.R. China
| | - Zhiyong Li
- Biomechanics Laboratory, School of Biological Science & Medical Engineering, Southeast University, Nanjing, P.R. China.,School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, QLD, Australia
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15
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Dissaux C, Wagner D, George D, Spingarn C, Rémond Y. Mechanical impairment on alveolar bone graft: A literature review. J Craniomaxillofac Surg 2019; 47:149-157. [DOI: 10.1016/j.jcms.2018.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/08/2018] [Accepted: 10/30/2018] [Indexed: 10/27/2022] Open
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16
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Ikegame M, Ejiri S, Okamura H. Expression of Non-collagenous Bone Matrix Proteins in Osteoblasts Stimulated by Mechanical Stretching in the Cranial Suture of Neonatal Mice. J Histochem Cytochem 2018; 67:107-116. [PMID: 30113872 DOI: 10.1369/0022155418793588] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We investigated the influence of mechanical stretching on the genetic expression pattern of non-collagenous bone matrix proteins in osteoblasts. The cranial sutures of neonatal mice were subjected to ex vivo mechanical stretching. In the non-stretched control group, as osteoblast differentiation progressed, the successive genetic expression of bone sialoprotein (BSP), osteopontin (OPN), and osteocalcin (OCN) was detected using in situ hybridization, in that order. In the stretched group, the sutures were widened, and after 24 hr of cultivation, a large number of osteoblasts and abundant new osteoid were observed on the borders of the parietal bones. All new osteoblasts expressed BSP and some of them expressed OPN, but very few of them expressed OCN. After 48 hr, more extensive presence of osteoid was noted on the borders of the parietal bones, and this osteoid was partially mineralized; all osteoblasts on the osteoid surface expressed BSP, and more osteoblasts expressed OPN than those after 24 hr cultivation. Surprisingly, many of the osteoblasts that did not express OPN, expressed OCN. This suggests that when osteoblast differentiation is stimulated by mechanical stress, the genetic expression pattern of non-collagenous proteins in the newly differentiated osteoblasts is affected.
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Affiliation(s)
- Mika Ikegame
- Department of Oral Morphology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Sadakazu Ejiri
- Department of Oral Anatomy, School of Dentistry, Asahi University, Gifu, Japan
| | - Hirohiko Okamura
- Department of Oral Morphology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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17
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Lab-on-a-chip platforms for quantification of multicellular interactions in bone remodeling. Exp Cell Res 2018; 365:106-118. [PMID: 29499205 DOI: 10.1016/j.yexcr.2018.02.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/22/2018] [Accepted: 02/23/2018] [Indexed: 01/09/2023]
Abstract
Researchers have been using lab-on-a-chip systems to isolate factors for study, simulate laboratory analysis and model cellular, tissue and organ level processes. The technology is increasing rapidly, but the bone field has been slow to keep pace. Novel models are needed that have the power and flexibility to investigate the elegant and synchronous multicellular interactions that occur in normal bone turnover and in disease states in which remodeling is implicated. By removing temporal and spatial limitations and enabling quantification of functional outcomes, the platforms should provide unique environments that are more biomimetic than single cell type systems while minimizing complex systemic effects of in vivo models. This manuscript details the development and characterization of lab-on-a-chip platforms for stimulating osteocytes and quantifying bone remodeling. Our platforms provide the foundation for a model that can be used to investigate remodeling interactions as a whole or as a standard mechanotransduction tool by which isolated activity can be quantified as a function of load.
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18
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Liu Q, Guo Y, Wang Y, Zou X, Yan Z. miR‑98‑5p promotes osteoblast differentiation in MC3T3‑E1 cells by targeting CKIP‑1. Mol Med Rep 2018; 17:4797-4802. [PMID: 29328483 DOI: 10.3892/mmr.2018.8416] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 11/20/2017] [Indexed: 11/06/2022] Open
Abstract
Casein kinase 2-interacting protein 1 (CKIP-1) is a negative regulator for bone formation. Previously, using bioinformatics analysis, CKIP‑1 has been predicted to serve the role of target gene of miR‑98‑5p. In the present study, the potential role of miR‑98‑5p in regulating osteoblast differentiation through CKIP‑1 was investigated. Following pre‑treatment with microRNA (miR)‑98‑5p agomir or miR‑98‑5p antagomir, MC3T3‑E1 cells were cultured in an osteoinductive medium. Subsequently, the expression of miR‑98‑5p, CKIP‑1 and levels of osteoblast differentiation markers, including alkaline phosphatase, matrix mineralization, osteocaicin, collagen type I, runt‑related transcription factor 2 and osteopontin were assayed. Using a dual‑luciferase reporter assay, it was demonstrated that CKIP‑1 was the target gene of miR‑98‑5p. miR‑98‑5p was upregulated as a result of treatment with miR‑98‑5p agomir and promoted osteoblast differentiation. Conversely, miR‑98‑5p antagomir inhibited miR‑98‑5p expression and osteoblast differentiation. miR‑98‑5p targeted CKIP‑1 by binding to its 3'‑untranslated region. Furthermore, miR‑98‑5p overexpression decreased the protein levels of CKIP‑1 and inhibition of miR‑98‑5p increased the protein levels of CKIP‑1. The results of the present study indicated that CKIP‑1 was a target gene of miR‑98‑5p and that miR‑98‑5p regulated osteoblast differentiation in MC3T3‑E1 cells by targeting CKIP‑1.
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Affiliation(s)
- Qiliang Liu
- Department of Biomedical Engineering, College of Biotechnology of Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yong Guo
- Department of Biomedical Engineering, College of Biotechnology of Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yang Wang
- Department of Biomedical Engineering, College of Biotechnology of Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Xianqiong Zou
- Department of Biomedical Engineering, College of Biotechnology of Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Zhixiong Yan
- Department of Biomedical Engineering, College of Biotechnology of Guilin Medical University, Guilin, Guangxi 541004, P.R. China
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Lee JM, Kim MG, Byun JH, Kim GC, Ro JH, Hwang DS, Choi BB, Park GC, Kim UK. The effect of biomechanical stimulation on osteoblast differentiation of human jaw periosteum-derived stem cells. Maxillofac Plast Reconstr Surg 2017; 39:7. [PMID: 28303237 PMCID: PMC5337228 DOI: 10.1186/s40902-017-0104-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 01/25/2017] [Indexed: 12/05/2022] Open
Abstract
Background This study was to investigate the effect of biomechanical stimulation on osteoblast differentiation of human periosteal-derived stem cell using the newly developed bioreactor. Methods Human periosteal-derived stem cells were harvested from the mandible during the extraction of an impacted third molar. Using the new bioreactor, 4% cyclic equibiaxial tension force (0.5 Hz) was applied for 2 and 8 h on the stem cells and cultured for 3, 7, and 14 days on the osteogenic medium. Biochemical changes of the osteoblasts after the biomechanical stimulation were investigated. No treatment group was referred to as control group. Results Alkaline phosphatase (ALP) activity and ALP messenger RNA (mRNA) expression level were higher in the strain group than those in the control group. The osteocalcin and osteonectin mRNA expressions were higher in the strain group compared to those in the control group on days 7 and 14. The vascular endothelial growth factor (VEGF) mRNA expression was higher in the strain group in comparison to that in the control group. Concentration of alizarin red S corresponding to calcium content was higher in the strain group than in the control group. Conclusions The study suggests that cyclic tension force could influence the osteoblast differentiation of periosteal-derived stem cells under optimal stimulation condition and the force could be applicable for tissue engineering.
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Affiliation(s)
- Ju-Min Lee
- JUM Oral and Maxillofacial Surgery Clinic, Seoul, South Korea.,Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Min-Gu Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - June-Ho Byun
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, South Korea
| | - Gyoo-Cheon Kim
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Jung-Hoon Ro
- Department of Biomedical Engineering, School of Medicine, Pusan National Univeristy, Yangsan, South Korea
| | - Dae-Seok Hwang
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Byul-Bora Choi
- Department of Oral Anatomy, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Geun-Chul Park
- Department of Biomedical Engineering, School of Medicine, Pusan National Univeristy, Yangsan, South Korea
| | - Uk-Kyu Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, South Korea
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20
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Jiang Y, Wang Y, Tang G. Cyclic tensile strain promotes the osteogenic differentiation of a bone marrow stromal cell and vascular endothelial cell co-culture system. Arch Biochem Biophys 2016; 607:37-43. [DOI: 10.1016/j.abb.2016.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 08/11/2016] [Accepted: 08/19/2016] [Indexed: 01/09/2023]
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21
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Yu HS, Kim JJ, Kim HW, Lewis MP, Wall I. Impact of mechanical stretch on the cell behaviors of bone and surrounding tissues. J Tissue Eng 2016; 7:2041731415618342. [PMID: 26977284 PMCID: PMC4765821 DOI: 10.1177/2041731415618342] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/15/2015] [Indexed: 12/27/2022] Open
Abstract
Mechanical loading is recognized to play an important role in regulating the behaviors of cells in bone and surrounding tissues in vivo. Many in vitro studies have been conducted to determine the effects of mechanical loading on individual cell types of the tissues. In this review, we focus specifically on the use of the Flexercell system as a tool for studying cellular responses to mechanical stretch. We assess the literature describing the impact of mechanical stretch on different cell types from bone, muscle, tendon, ligament, and cartilage, describing individual cell phenotype responses. In addition, we review evidence regarding the mechanotransduction pathways that are activated to potentiate these phenotype responses in different cell populations.
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Affiliation(s)
- Hye-Sun Yu
- Department of Biochemical Engineering, University College London, London, UK; Department of Nanobiomedical Science and BK21 Plus NBM Global Research Center for Regenerative Medicine, Dankook University Graduate School, Cheonan, South Korea; Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, South Korea
| | - Jung-Ju Kim
- Department of Nanobiomedical Science and BK21 Plus NBM Global Research Center for Regenerative Medicine, Dankook University Graduate School, Cheonan, South Korea; Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, South Korea
| | - Hae-Won Kim
- Department of Nanobiomedical Science and BK21 Plus NBM Global Research Center for Regenerative Medicine, Dankook University Graduate School, Cheonan, South Korea; Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, South Korea; Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, South Korea
| | - Mark P Lewis
- Musculo-Skeletal Biology Research Group, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK
| | - Ivan Wall
- Department of Biochemical Engineering, University College London, London, UK; Department of Nanobiomedical Science and BK21 Plus NBM Global Research Center for Regenerative Medicine, Dankook University Graduate School, Cheonan, South Korea
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22
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Ramchandani D, Weber GF. Interactions between osteopontin and vascular endothelial growth factor: Implications for skeletal disorders. Bone 2015; 81:7-15. [PMID: 26123594 DOI: 10.1016/j.bone.2015.05.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 02/09/2015] [Accepted: 05/08/2015] [Indexed: 11/28/2022]
Abstract
Osteopontin (OPN) and vascular endothelial growth factor (VEGF) are characterized by a convergence in function for maintaining the homeostasis of the skeletal and renal systems (the bone-renal-vascular axis regulates bone metabolism). The two cytokines contribute to bone remodeling, dental healing, kidney function, and the adjustment to microgravity. Often, they are co-expressed or one molecule induces the other, however, in some settings OPN-associated pathways and VEGF-associated pathways are distinct. In bone remodeling, OPN and VEGF are regulated under the influence of growth factors and hormones, hypoxia and inflammation, the micro-environment, and various physical forces. Their abundance can be affected by drug treatment. OPN and VEGF are variably associated with kidney disease. Their balanced levels are critical for restoring endothelial cell function and ameliorating the adverse effects of microgravity. Here, we review the relevant 83 papers of 257 articles published, and listed in PubMed under the key words OPN and VEGF.
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Affiliation(s)
| | - Georg F Weber
- James L. Winkle College of Pharmacy, University of Cincinnati, USA.
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Preclinical models for in vitro mechanical loading of bone-derived cells. BONEKEY REPORTS 2015; 4:728. [PMID: 26331007 DOI: 10.1038/bonekey.2015.97] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/29/2015] [Indexed: 02/06/2023]
Abstract
It is well established that bone responds to mechanical stimuli whereby physical forces are translated into chemical signals between cells, via mechanotransduction. It is difficult however to study the precise cellular and molecular responses using in vivo systems. In vitro loading models, which aim to replicate forces found within the bone microenvironment, make the underlying processes of mechanotransduction accessible to the researcher. Direct measurements in vivo and predictive modeling have been used to define these forces in normal physiological and pathological states. The types of mechanical stimuli present in the bone include vibration, fluid shear, substrate deformation and compressive loading, which can all be applied in vitro to monolayer and three-dimensional (3D) cultures. In monolayer, vibration can be readily applied to cultures via a low-magnitude, high-frequency loading rig. Fluid shear can be applied to cultures in multiwell plates via a simple rocking platform to engender gravitational fluid movement or via a pump to cells attached to a slide within a parallel-plate flow chamber, which may be micropatterned for use with osteocytes. Substrate strain can be applied via the vacuum-driven FlexCell system or via a four-point loading jig. 3D cultures better replicate the bone microenvironment and can also be subjected to the same forms of mechanical stimuli as monolayer, including vibration, fluid shear via perfusion flow, strain or compression. 3D cocultures that more closely replicate the bone microenvironment can be used to study the collective response of several cell types to loading. This technical review summarizes the methods for applying mechanical stimuli to bone cells in vitro.
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Wang QS, Zhang XC, Li RX, Sun JG, Su WH, Guo Y, Li H, Zhang XZ. A comparative study of mechanical strain, icariin and combination stimulations on improving osteoinductive potential via NF-kappaB activation in osteoblast-like cells. Biomed Eng Online 2015; 14:46. [PMID: 25994935 PMCID: PMC4455701 DOI: 10.1186/s12938-015-0039-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/16/2015] [Indexed: 11/28/2022] Open
Abstract
Background The combination of drugs and exercise was the effective treatment in bone injure and rebuilding in clinic. As mechanical strain has potential in inducing the differentiation of osteoblasts in our previous study, the further research to investigate the combination of mechanical strain and icariin stimulation on inducing osteoblast proliferation, differentiation and the possible mechanism in MC3T3-E1 cell line. Methods A whole cell enzyme-linked immunosorbent assay that detects the bromodeoxyuridine incorporation during DNA synthesis was applied to evaluate the proliferation. The mRNA expression of alkaline phosphatase (ALP), osteocalcin (OCN), type I collagen (Col I), bone morphogenetic protein-2 (BMP-2) and BMP-4 was detected by real-time reverse-transcription polymerase chain reaction. The activity of ALP was analyzed by ELISA and the protein expression of OCN, Col I and BMP-2 was assessed by western blot. Moreover, the activity of nuclear transcription factor kappa-B (NF-κB) signaling pathway was investigated with the expression of inhibitor of κB (IκB) α, phosphorylation of IκB-α (P-IκB-α), p65, P-p65 by western blot. Results We observed that compared to single mechanical strain or icariin stimulation, the mRNA and protein expressions of ALP (P < 0.05 or P < 0.01), OCN (P < 0.01) and Col I (P < 0.05 or P < 0.01) were increased significantly by the combination of mechanical strain and icariin stimulation. Moreover, the combination of mechanical strain and icariin stimulation could up-regulate the expression of BMP-2 (P < 0.01) and BMP-4 compared to single mechanical strain or icariin stimulation. The combination of mechanical strain and icariin stimulation could activate NF-κB signaling pathway by increasing the expression of IκB α, P-IκB-α, p65, P-p65 (P < 0.01). Conclusion The combination of mechanical strain and icariin stimulation could activate the NF-κB pathway to improve the proliferation, differentiation of osteoblast-like cells.
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Affiliation(s)
- Qiang-Song Wang
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Xin-Chang Zhang
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Rui-Xin Li
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Jing-Gong Sun
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Wei-Hua Su
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Yong Guo
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Hao Li
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
| | - Xi-Zheng Zhang
- Tianjin Institute of Medical Equipment, Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin, 300162, People's Republic of China.
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Zeng Q, Guo Y, Liu Y, Li R, Zhang X, Liu L, Wang Y, Zhang X, Zou X. Integrin-β1, not integrin-β5, mediates osteoblastic differentiation and ECM formation promoted by mechanical tensile strain. Biol Res 2015; 48:25. [PMID: 25971622 PMCID: PMC4436743 DOI: 10.1186/s40659-015-0014-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 04/23/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mechanical strain plays a great role in growth and differentiation of osteoblast. A previous study indicated that integrin-β (β1, β5) mediated osteoblast proliferation promoted by mechanical tensile strain. However, the involvement of integrin-β in osteoblastic differentiation and extracellular matrix (ECM) formation induced by mechanical tensile strain, remains unclear. RESULTS After transfection with integrin-β1 siRNA or integrin-β5 siRNA, mouse MC3T3-E1 preosteoblasts were cultured in cell culture dishes and stimulated with mechanical tensile strain of 2500 microstrain (με) at 0.5 Hz applied once a day for 1 h over 3 or 5 consecutive days. The cyclic tensile strain promoted osteoblastic differentiation of MC3T3-E1 cells. Transfection with integrin-β1 siRNA attenuated the osteoblastic diffenentiation induced by the tensile strain. By contrast, transfection with integrin-β5 siRNA had little effect on the osteoblastic differentiation induced by the strain. At the same time, the result of ECM formation promoted by the strain, was similar to the osteoblastic differentiation. CONCLUSION Integrin-β1 mediates osteoblast differentiation and osteoblastic ECM formation promoted by cyclic tensile strain, and integrin-β5 is not involved in the osteoblasts response to the tensile strain.
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Affiliation(s)
- Qiangcheng Zeng
- Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou, 253023, Shandong, China.
| | - Yong Guo
- College of Biotechnology, Guilin Medical University, Guilin, 541004, Guangxi, China. .,Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, 300161, China.
| | - Yongming Liu
- College of Biotechnology, Guilin Medical University, Guilin, 541004, Guangxi, China.
| | - Ruixin Li
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, 300161, China.
| | - Xinchang Zhang
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, 300161, China.
| | - Lu Liu
- Chemistry Department, Logistics College of Chinese People's Armed Police Forces, Tianjin, China.
| | - Yang Wang
- College of Biotechnology, Guilin Medical University, Guilin, 541004, Guangxi, China.
| | - Xizheng Zhang
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, 300161, China.
| | - Xianqiong Zou
- College of Biotechnology, Guilin Medical University, Guilin, 541004, Guangxi, China.
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Guo Y, Wang Y, Liu Y, Liu Y, Zeng Q, Zhao Y, Zhang X, Zhang X. MicroRNA-218, microRNA-191*, microRNA-3070a and microRNA-33 are responsive to mechanical strain exerted on osteoblastic cells. Mol Med Rep 2015; 12:3033-8. [PMID: 25937096 DOI: 10.3892/mmr.2015.3705] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 03/12/2015] [Indexed: 11/06/2022] Open
Abstract
MicroRNA (miRNA) is an important regulator of cell differentiation and function. Mechanical strain is important in the growth and differentiation of osteoblasts. Therefore, mechanresponsive miRNA may be important in the response of osteoblasts to mechanical strain. The purpose of the present study was to select and identify the mechanoresponsive miRNAs of osteoblasts. Mouse osteoblastic MC3T3-E1 cells were cultured in cell culture dishes and stimulated with a mechanical tensile strain of 2,50 με at 0.5 Hz, and the activity of alkaline phosphatase (ALP), mRNA levels of ALP, osteocalcin (OCN), and collagen type I (Col I), and protein levels of bone morphogenetic proteins (BMPs) in the cell culture medium were assayed. Following miRNA microarray and reverse transcription-quantitative polymerase chain reaction analyses, differentially expressed miRNAs in the mechanically strained cells and unstrained cells were selected and identified. Using bioinformatics analysis, the target genes of the miRNAs were then predicted. The results revealed that the mechanical strain of 2,500 με increased the activity of ALP, the mRNA levels of ALP, OCN and Col I, and the protein levels of bone morphogenetic protein(BMP)-2 and BMP-4 Continuous mechanical stimulation for 8 h had the most marked stimulant effects. miR-218, miR-191*, miR-3070a and miR-33 were identified as differentially expressed miRNAs in the mechanically strained MC3T3-E1 cells. Certain target genes of these four miRNAs were involved in osteoblastic differentiation. These findings indicated that a mechanical strain of 2,500 με, particularly for a period of 8 h, promoted osteoblastic differentiation, and the four mechanoresponsive miRNAs identified may be a potential regulator of osteoblastic differentiation and their response to mechanical strain.
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Affiliation(s)
- Yong Guo
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yang Wang
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yinqin Liu
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Yongming Liu
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Qiangcheng Zeng
- Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou, Shandong 253000, P.R. China
| | - Yumin Zhao
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541004, P.R. China
| | - Xinchang Zhang
- Lab of Biomechanics, Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, P.R. China
| | - Xizheng Zhang
- Lab of Biomechanics, Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, P.R. China
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Ramchandani D, Weber GF. Interactions between osteopontin and vascular endothelial growth factor: Implications for cancer. Biochim Biophys Acta Rev Cancer 2015; 1855:202-22. [PMID: 25732057 DOI: 10.1016/j.bbcan.2015.02.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 02/10/2015] [Accepted: 02/22/2015] [Indexed: 12/12/2022]
Abstract
For this comprehensive review, 257 publications with the keywords "osteopontin" or "OPN" and "vascular endothelial growth factor" or "VEGF" in PubMed were screened (time frame from year 1996 to year 2014). 37 articles were excluded because they were not focused on the interactions between these molecules, and papers relevant for transformation-related phenomena were selected. Osteopontin (OPN) and vascular endothelial growth factor (VEGF) are characterized by a convergence in function for regulating cell motility and angiogenesis, the response to hypoxia, and apoptosis. Often, they are co-expressed or one molecule induces the other, however, in some settings OPN-associated pathways and VEGF-associated pathways are distinct. Their relationships affect the pathogenesis in cancer, where they contribute to progression and angiogenesis and serve as markers for poor prognosis. The inhibition of OPN may reduce VEGF levels and suppress tumor progression. In vascular pathologies, these two cytokines mediate remodeling, but may also perpetuate inflammation and narrowing of the arteries. OPN and VEGF are elevated and contribute to vascularization in inflammatory diseases.
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Affiliation(s)
| | - Georg F Weber
- James L. Winkle College of Pharmacy, University of Cincinnati, USA.
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Influence of heating and cyclic tension on the induction of heat shock proteins and bone-related proteins by MC3T3-E1 cells. BIOMED RESEARCH INTERNATIONAL 2014; 2014:354260. [PMID: 25013774 PMCID: PMC4071810 DOI: 10.1155/2014/354260] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 03/25/2014] [Accepted: 03/26/2014] [Indexed: 12/02/2022]
Abstract
Stress conditioning (e.g., thermal, shear, and tensile stress) of bone cells has been shown to enhance healing. However, prior studies have not investigated whether combined stress could synergistically promote bone regeneration. This study explored the impact of combined thermal and tensile stress on the induction of heat shock proteins (HSPs) and bone-related proteins by a murine preosteoblast cell line (MC3T3-E1). Cells were exposed to thermal stress using a water bath (44°C for 4 or 8 minutes) with postheating incubation (37°C for 4 hours) followed by exposure to cyclic strain (equibiaxial 3%, 0.2 Hz, cycle of 10-second tensile stress followed by 10-second rest). Combined thermal stress and tensile stress induced mRNA expression of HSP27 (1.41 relative fold induction (RFI) compared to sham-treated control), HSP70 (5.55 RFI), and osteopontin (1.44 RFI) but suppressed matrix metalloproteinase-9 (0.6 RFI) compared to the control. Combined thermal and tensile stress increased vascular endothelial growth factor (VEGF) secretion into the culture supernatant (1.54-fold increase compared to the control). Therefore, combined thermal and mechanical stress preconditioning can enhance HSP induction and influence protein expression important for bone tissue healing.
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Lacunocanalicular fluid flow transduces mechanical tension stress during distraction osteogenesis. J Craniofac Surg 2013; 24:1558-64. [PMID: 24036726 DOI: 10.1097/scs.0b013e31828f2060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The mechanotransduction mechanisms linking distraction device activation to new bone formation remain unknown. We hypothesize that the tension stress of activation during distraction osteogenesis is transmitted through lacunocanalicular fluid flow to initiate the osteogenic signaling cascade. Adult Sprague-Dawley rats (N = 24) were subjected to mandibular osteotomy and application of an external distraction device. After a 3-day latency period, half the animals (n = 12) underwent device activation at 0.25 mm twice daily for 6 days (total activation, 3 mm), and the other half (n = 12) had no activation. On day 10, the animals were injected with fluorescent reactive red lacunocanalicular tracer before killing. Mandibles were harvested, embedded, and sectioned, and reactive red epifluorescence lacunocanalicular flow was measured. Protein was harvested for focal adhesion kinase 1 (FAK1), NESPRIN1, SUN1, LAMIN A/C, and SMAD1 Western blotting as well as for bone morphogenetic protein (BMP)-2 enzyme-linked immunosorbent assay and alkaline phosphatase assay. Lacunocanalicular fluid flow was significantly greater in the distracted samples (60.5 ± 14 vs 10.3 ± 4 molecules of equivalent soluble fluorochrome per megapixel, P = 0.01). Flow distribution demonstrated the highest lacunocanalicular flow near the center of the distraction gap. Increased lacunocanalicular flow resulted in increased FAK1 (P = 0.009), NESPRIN1 (P = 0.01), SUN1 (P = 0.01), and LAMIN A/C (P = 0.008) expression. Focal adhesion kinase 1 activation in the presence of BMP-2 protein expression (P = 0.001) resulted in increased intranuclear SMAD1 phosphorylation (P = 0.04) and alkaline phosphatase activity (P < 0.0001). These findings suggest that activation of the distraction osteogenesis device affects cellular response through changes in lacunocanalicular fluid flow.
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Moles MD, Scotchford CA, Ritchie AC. Development of an elastic cell culture substrate for a novel uniaxial tensile strain bioreactor. J Biomed Mater Res A 2013; 102:2356-64. [PMID: 23946144 PMCID: PMC4255296 DOI: 10.1002/jbm.a.34917] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/30/2013] [Accepted: 08/09/2013] [Indexed: 02/01/2023]
Abstract
Bioreactors can be used for mechanical conditioning and to investigate the mechanobiology of cells in vitro. In this study a polyurethane (PU), Chronoflex AL, was evaluated for use as a flexible cell culture substrate in a novel bioreactor capable of imparting cyclic uniaxial tensile strain to cells. PU membranes were plasma etched, across a range of operating parameters, in oxygen. Contact angle analysis and X-ray photoelectron spectroscopy showed increases in wettability and surface oxygen were related to both etching power and duration. Atomic force microscopy demonstrated that surface roughness decreased after etching at 20 W but was increased at higher powers. The etching parameters, 20 W 40 s, produced membranes with high surface oxygen content (21%), a contact angle of 66° ± 7° and reduced topographical features. Etching and protein conditioning membranes facilitated attachment, and growth to confluence within 3 days, of MG-63 osteoblasts. After 2 days with uniaxial strain (1%, 30 cycles/min, 1500 cycles/day), cellular alignment was observed perpendicular to the principal strain axis, and found to increase after 24 h. The results indicate that the membrane supports culture and strain transmission to adhered cells. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 2356–2364, 2014.
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Affiliation(s)
- Matthew D Moles
- Division of Materials, Mechanics and Structures, Faculty of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
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31
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Cartilage and Ligament Tissue Engineering. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00114-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Guo Y, Zhang CQ, Zeng QC, Li RX, Liu L, Hao QX, Shi CH, Zhang XZ, Yan YX. Mechanical strain promotes osteoblast ECM formation and improves its osteoinductive potential. Biomed Eng Online 2012; 11:80. [PMID: 23098360 PMCID: PMC3502495 DOI: 10.1186/1475-925x-11-80] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Accepted: 10/09/2012] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The extracellular matrix (ECM) provides a supportive microenvironment for cells, which is suitable as a tissue engineering scaffold. Mechanical stimulus plays a significant role in the fate of osteoblast, suggesting that it regulates ECM formation. Therefore, we investigated the influence of mechanical stimulus on ECM formation and bioactivity. METHODS Mouse osteoblastic MC3T3-E1 cells were cultured in cell culture dishes and stimulated with mechanical tensile strain. After removing the cells, the ECMs coated on dishes were prepared. The ECM protein and calcium were assayed and MC3T3-E1 cells were re-seeded on the ECM-coated dishes to assess osteoinductive potential of the ECM. RESULTS The cyclic tensile strain increased collagen, bone morphogenetic protein 2 (BMP-2), BMP-4, and calcium levels in the ECM. Compared with the ECM produced by unstrained osteoblasts, those of mechanically stimulated osteoblasts promoted alkaline phosphatase activity, elevated BMP-2 and osteopontin levels and mRNA levels of runt-related transcriptional factor 2 (Runx2) and osteocalcin (OCN), and increased secreted calcium of the re-seeded MC3T3-E1 cells. CONCLUSION Mechanical strain promoted ECM production of osteoblasts in vitro, increased BMP-2/4 levels, and improved osteoinductive potential of the ECM. This study provided a novel method to enhance bioactivity of bone ECM in vitro via mechanical strain to osteoblasts.
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Affiliation(s)
- Yong Guo
- Academy of Military Medical Science, Tianjin Institute of Medical Equipment, No 106 Wandong Road, Hedong District, Tianjin, 300161, China
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Li FF, Chen FL, Wang H, Yu SB, Cui JH, Ding Y, Feng X. Proteomics based detection of differentially expressed proteins in human osteoblasts subjected to mechanical stress. Biochem Cell Biol 2012; 91:109-15. [PMID: 23527640 DOI: 10.1139/bcb-2012-0021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Mechanical stress is essential for bone development. Mechanical stimuli are transduced to biochemical signals that regulate proliferation, differentiation, and cytoskeletal reorganization in osteoblasts. In this study, we used proteomics to evaluate differences in the protein expression profiles of untreated Saos-2 osteoblast cells and Saos-2 cells subjected to mechanical stress loading. Using 2-D electrophoresis, MALDI-TOF mass spectroscopy, and bioinformatics, we identified a total of 26 proteins differentially expressed in stress loaded cells compared with control cells. Stress loaded Saos-2 cells exhibited significant upregulation of 17 proteins and significant downregulation of 9 proteins compared with control cells. Proteins that were most significantly upregulated in mechanically loaded cells included those regulating osteogenesis, energy metabolism, and the stress response, such as eukaryotic initiation factor 2 (12-fold), mitochondrial ATP synthase (8-fold), and peptidylprolyl isomerase A (cyclophilin A)-like 3 (6.5-fold). Among the proteins that were significantly downregulated were those involved in specific signaling pathways and cell proliferation, such as protein phosphatase regulatory (inhibitor) subunit 12B (13.8-fold), l-lactate dehydrogenase B (9.4-fold), Chain B proteasome activator Reg (Alpha) PA28 (7.7-fold), and ubiquitin carboxyl-terminal esterase L1 (6.9-fold). Our results provide a platform to understand the molecular mechanisms underlying mechanotransduction.
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Affiliation(s)
- Fei-Fei Li
- Department of Orthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032 Shannxi Province, China
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Pitsillides AA, Rawlinson SCF. Using cell and organ culture models to analyze responses of bone cells to mechanical stimulation. Methods Mol Biol 2012; 816:593-619. [PMID: 22130954 DOI: 10.1007/978-1-61779-415-5_37] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bone cells of the osteoblastic lineage are responsive to the local mechanical environment. Through integration of a number of possible loading-induced regulatory stimuli, osteocyte, osteoblast, and osteoclast behaviour is organized to fashion a skeletal element of sufficient strength and toughness to resist fracture and crack propagation. Early pre-osteogenic responses had been determined in vivo and this led to the development of bone organ culture models to elucidate other pre-osteogenic responses where osteocytes and osteoblasts retain the natural orientation, connections and attachments to their native extracellular matrix. The application of physiological mechanical loads to bone in these organ culture models generates the regulatory stimuli. As a consequence, these experiments can be used to illustrate the distinctive mechanisms by which osteocytes and osteoblasts respond to mechanical loads and also differences in these responses, suggesting co-ordinated and cooperatively between cell populations. Organ explant cultures are awkward to maintain, and have a limited life, but length of culture times are improving. Monolayer cultures are much easier to maintain and permit the application of a particular mechanical stimulation to be studied in isolation; mainly direct mechanical strain or fluid shear strains. These allow for the response of a single cell type to the applied mechanical stimulation to be monitored precisely.The techniques that can be used to apply mechanical strain to bone and bone cells have not advanced greatly since the first edition. The output from such experiments has, however, increased substantially and their importance is now more broadly accepted. This suggests a growing use of these approaches and an increasing awareness of the importance of the mechanical environment in controlling normal bone cell behaviour. We expand the text to include additions and modifications made to the straining apparatus and update the research cited to support this growing role of cell and organ culture models to analyze responses of bone cells to mechanical stimulation.
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Affiliation(s)
- Andrew A Pitsillides
- Department of Veterinary Basic Sciences, The Royal Veterinary College, Royal College Street, London, UK.
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Kang MN, Yoon HH, Seo YK, Park JK. Effect of mechanical stimulation on the differentiation of cord stem cells. Connect Tissue Res 2011; 53:149-59. [PMID: 22149641 DOI: 10.3109/03008207.2011.619284] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this study, we evaluated the effect of mechanical stimulation on the differentiation of umbilical cord-derived mesenchymal stem cells (UC-MSCs) in osteogenic medium using a Flexcell system that imposed cyclic uniaxial mechanical stimulation at a strain of 0%, 5%, or 10% (5 s of stretch and 15 s of relaxation) for 10 days. The expression of MSC surface antigens (CD73, CD90, and CD105) was significantly decreased as strain increased. Mechanical stimulation inhibited the growth of UC-MSCs and slightly raised lactate dehydrogenase production. Mechanically stimulated groups produced more elastin and sulfated glycosaminoglycan than unstimulated groups and these increases were in proportion to the degree of strain. Reverse transcription-polymerase chain reaction analysis revealed that mechanical stimulation induced a significant increase in the mRNA expression of osteoblast differentiation markers. The mRNA levels of osteopontin, osteonectin, and type I collagen in the 5% and 10% strained groups were significantly higher than those in the 0% strained group. From the Western blot analysis, UC-MSCs produced bone sialoprotein and vimentin in a mechanical strain-dependent manner. Thus, cyclic mechanical loading was able to enhance the differentiation of human UC-MSCs into osteoblast-like cells as determined by osteogenic gene and protein expression. Furthermore, this finding has important implications for the use of the combination of mechanical and osteogenic differentiation media for UC-MSCs in tissue engineering and regenerative medicine.
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Affiliation(s)
- Mi-Na Kang
- Department of Medical Biotechnology, Dongguk University, Seoul, Republic of Korea
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Chung E, Rylander MN. Response of a preosteoblastic cell line to cyclic tensile stress conditioning and growth factors for bone tissue engineering. Tissue Eng Part A 2011; 18:397-410. [PMID: 21919794 DOI: 10.1089/ten.tea.2010.0414] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Bone regeneration can be accelerated by utilizing mechanical stress and growth factors (GFs). However, a limited understanding exists regarding the response of preosteoblasts to tensile stress alone or with GFs. We measured cell proliferation and expression of heat-shock proteins (HSPs) and other bone-related proteins by preosteoblasts following cyclic tensile stress (1%-10% magnitude) alone or in combination with bone morphogenetic protein-2 (BMP-2) and transforming growth factor-β1 (TGF-β1). Tensile stress (3%) with GFs induced greater gene upregulation of osteoprotegerin (3.3 relative fold induction [RFI] compared to sham-treated samples), prostaglandin E synthase 2 (2.1 RFI), and vascular endothelial growth factor (VEGF) (11.5 RFI), compared with samples treated with stimuli alone or sham-treated samples. The most significant increases in messenger RNA expression occurred with GF addition to either static-cultured or tensile-loaded (1% elongation) cells for the following genes: HSP47 (RFI=2.53), cyclooxygenase-2 (RFI=72.52), bone sialoprotein (RFI=11.56), and TGF-β1 (RFI=8.05). Following 5% strain with GFs, VEGF secretion increased 64% (days 3-6) compared with GF alone and cell proliferation increased 23% compared with the sham-treated group. GF addition increased osteocalcin secretion but decreased matrix metalloproteinase-9 significantly (days 3-6). Tensile stress and GFs in combination may enhance bone regeneration by initiating angiogenic and anti-osteoclastic effects and promote cell growth.
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Affiliation(s)
- Eunna Chung
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, USA
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Weiss S, Henle P, Roth W, Bock R, Boeuf S, Richter W. Design and characterization of a new bioreactor for continuous ultra-slow uniaxial distraction of a three-dimensional scaffold-free stem cell culture. Biotechnol Prog 2010; 27:86-94. [DOI: 10.1002/btpr.510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Revised: 07/14/2010] [Indexed: 01/13/2023]
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Geris L, Vandamme K, Naert I, Sloten JV, Van Oosterwyck H, Duyck J. Mechanical Loading Affects Angiogenesis and Osteogenesis in an In Vivo Bone Chamber: A Modeling Study. Tissue Eng Part A 2010; 16:3353-61. [DOI: 10.1089/ten.tea.2010.0130] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Liesbet Geris
- Division of Biomechanics and Engineering Design, Department of Mechanical Engineering, K.U.Leuven, Leuven, Belgium
- Prometheus, Division of Skeletal Tissue Engineering, K.U.Leuven, Leuven, Belgium
- Biomechanics Research Unit, Aerospace and Mechanical Engineering Department U.Liège, Liège, Belgium
| | - Katleen Vandamme
- Department of Prosthetic Dentistry/BIOMAT Research Cluster, Faculty of Medicine, School of Dentistry, Oral Pathology, and Maxillofacial Surgery, K.U.Leuven, Leuven, Belgium
| | - Ignace Naert
- Department of Prosthetic Dentistry/BIOMAT Research Cluster, Faculty of Medicine, School of Dentistry, Oral Pathology, and Maxillofacial Surgery, K.U.Leuven, Leuven, Belgium
| | - Jos Vander Sloten
- Division of Biomechanics and Engineering Design, Department of Mechanical Engineering, K.U.Leuven, Leuven, Belgium
| | - Hans Van Oosterwyck
- Division of Biomechanics and Engineering Design, Department of Mechanical Engineering, K.U.Leuven, Leuven, Belgium
- Prometheus, Division of Skeletal Tissue Engineering, K.U.Leuven, Leuven, Belgium
| | - Joke Duyck
- Department of Prosthetic Dentistry/BIOMAT Research Cluster, Faculty of Medicine, School of Dentistry, Oral Pathology, and Maxillofacial Surgery, K.U.Leuven, Leuven, Belgium
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Thompson MS, Abercrombie SR, Ott CE, Bieler FH, Duda GN, Ventikos Y. Quantification and significance of fluid shear stress field in biaxial cell stretching device. Biomech Model Mechanobiol 2010; 10:559-64. [DOI: 10.1007/s10237-010-0255-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Accepted: 09/01/2010] [Indexed: 10/19/2022]
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Upregulation of bone-like extracellular matrix expression in human dental pulp stem cells by mechanical strain. BIOTECHNOL BIOPROC E 2010. [DOI: 10.1007/s12257-009-0102-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Kuo CK, Marturano JE, Tuan RS. Novel strategies in tendon and ligament tissue engineering: Advanced biomaterials and regeneration motifs. BMC Sports Sci Med Rehabil 2010; 2:20. [PMID: 20727171 PMCID: PMC2939640 DOI: 10.1186/1758-2555-2-20] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 08/20/2010] [Indexed: 02/08/2023]
Abstract
Tendon and ligaments have poor healing capacity and when injured often require surgical intervention. Tissue replacement via autografts and allografts are non-ideal strategies that can lead to future problems. As an alternative, scaffold-based tissue engineering strategies are being pursued. In this review, we describe design considerations and major recent advancements of scaffolds for tendon/ligament engineering. Specifically, we outline native tendon/ligament characteristics critical for design parameters and outcome measures, and introduce synthetic and naturally-derived biomaterials used in tendon/ligament scaffolds. We will describe applications of these biomaterials in advanced tendon/ligament engineering strategies including the utility of scaffold functionalization, cyclic strain, growth factors, and interface considerations. The goal of this review is to compile and interpret the important findings of recent tendon/ligament engineering research in an effort towards the advancement of regenerative strategies.
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Affiliation(s)
- Catherine K Kuo
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Joseph E Marturano
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219, USA
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Affiliation(s)
- Chenyu Huang
- Department of Plastic, Reconstructive and Aesthetic SurgeryNippon Medical School Tokyo Japan
- Department of Plastic SurgeryMeitan General Hospital Beijing China
| | - Rei Ogawa
- Department of Plastic, Reconstructive and Aesthetic SurgeryNippon Medical School Tokyo Japan
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Kokkinos PA, Zarkadis IK, Panidis TT, Deligianni DD. Estimation of hydrodynamic shear stresses developed on human osteoblasts cultured on Ti-6Al-4V and strained by four point bending. Effects of mechanical loading to specific gene expression. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:655-665. [PMID: 18941870 DOI: 10.1007/s10856-008-3602-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2008] [Accepted: 09/23/2008] [Indexed: 05/26/2023]
Abstract
The aim of the present investigation was to study the effects of mechanical strain on the orthopedic biomaterial Ti-6Al-4V-osteoblast interface, using an in vitro model. Homogeneous strain was applied to Human Bone Marrow derived Osteoblasts (HBMDOs) cultured on Ti-6Al-4V, at levels which are considered physiological, by a four-point bending mechanostimulatory system. A simple model for the estimation of maximum hydrodynamic shear stresses developed on cell culture layer and induced by nutrient medium flow during mechanical loading, as a function of the geometry of the culture plate and the load characteristics, is proposed. Shear stresses were lower than those which can elicit cell response. Mechanical loading was found that contributes to the regulation of osteoblast differentiation by influencing the expression of the osteoblast-specific transcription factor Cbfa1, both at the mRNA and protein level, and also the osteocalcin expression, whereas osteopontin gene expression was unaffected by mechanical loading at all experimental conditions.
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Affiliation(s)
- Petros A Kokkinos
- Biomedical Engineering Laboratory, Department of Mechanical Engineering and Aeronautics, University of Patras, Rion, 26500, Patra, Greece
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Han MJ, Seo YK, Yoon HH, Song KY, Park JK. Effect of mechanical tension on the human dental pulp cells. BIOTECHNOL BIOPROC E 2008. [DOI: 10.1007/s12257-008-0146-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Biological Basis of Bone Formation, Remodeling, and Repair—Part III: Biomechanical Forces. TISSUE ENGINEERING PART B-REVIEWS 2008; 14:285-93. [DOI: 10.1089/ten.teb.2008.0084] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Bibliography. Current world literature. Head and neck reconstruction. Curr Opin Otolaryngol Head Neck Surg 2008; 16:394-7. [PMID: 18626261 DOI: 10.1097/moo.0b013e32830c1edc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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