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Li J, Zhou X, Chen J, Eliasson P, Kingham PJ, Backman LJ. Secretome from myoblasts statically loaded at low intensity promotes tenocyte proliferation via the IGF-1 receptor pathway. FASEB J 2023; 37:e23203. [PMID: 37732638 DOI: 10.1096/fj.202301097r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/16/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
Exercise is widely recognized as beneficial for tendon healing. Recently, it has been described that muscle-derived molecules secreted in response to static exercise influence tendon healing. In this study, the optimal static loading intensity for tendon healing and the composition of secretome released by myoblasts in response to different intensities of static strain were investigated. In an in vitro coculture model, myoblasts were mechanically loaded using a Flexcell Tension System. Tenocytes were seeded on transwell inserts that allowed communication between the tenocytes and myoblasts without direct contact. Proliferation and migration assays, together with RNA sequencing, were used to determine potential cellular signaling pathways. The secretome from myoblasts exposed to 2% static loading increased the proliferation and migration of the cocultured tenocytes. RNA-seq analysis revealed that this loading condition upregulated the expression of numerous genes encoding secretory proteins, including insulin-like growth factor-1 (IGF-1). Confirmation of IGF-1 expression and secretion was carried out using qPCR and enzyme-linked immunosorbt assay (ELISA), revealing a statistically significant upregulation in response to 2% static loading in comparison to both control conditions and higher loading intensities of 5% and 10%. Addition of an inhibitor of the IGF-1 receptor (PQ401) to the tenocytes significantly reduced myoblast secretome-induced tenocyte proliferation. In conclusion, IGF-1 may be an important molecule in the statically loaded myoblast secretome, which is responsible for influencing tenocytes during exercise-induced healing.
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Affiliation(s)
- Junhong Li
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
| | - Xin Zhou
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
| | - Jialin Chen
- School of Medicine, Southeast University, Nanjing, China
| | - Pernilla Eliasson
- Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Paul J Kingham
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Ludvig J Backman
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
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He Y, Huang G, Hong S, Zuo X, Zhao Z, Hong L. Ferrostatin-1 alleviates the damage of C2C12 myoblast and mouse pelvic floor muscle induced by mechanical trauma. Cell Death Discov 2023; 9:232. [PMID: 37419877 DOI: 10.1038/s41420-023-01482-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/12/2023] [Accepted: 06/12/2023] [Indexed: 07/09/2023] Open
Abstract
Ferroptosis is a special form of regulated cell death, which is reported to play an important role in a variety of traumatic diseases by promoting lipid peroxidation and devastating cell membrane structure. Pelvic floor dysfunction (PFD) is a kind of disease affecting the quality and health of many women's lives, which is closely related to the injury of the pelvic floor muscle. Clinical findings have discovered that there is anomalous oxidative damage to the pelvic floor muscle in women with PFD caused by mechanical trauma, but the specific mechanism is still unclear. In this study, we explored the role of ferroptosis-associated oxidative mechanisms in mechanical stretching-induced pelvic floor muscle injury, and whether obesity predisposed pelvic floor muscle to ferroptosis from mechanical injury. Our results, in vitro, showed that mechanical stretch could induce oxidative damage to myoblasts and trigger ferroptosis. In addition, glutathione peroxidase 4 (GPX4) down-regulation and 15-lipoxygenase 1(15LOX-1) up-regulation exhibited the same variational characteristics as ferroptosis, which was much more pronounced in palmitic acid (PA)-treated myoblasts. Furthermore, ferroptosis induced by mechanical stretch could be rescued by ferroptosis inhibitor (ferrostatin-1). More importantly, in vivo, we found that the mitochondria of pelvic floor muscle shrank, which were consistent with the mitochondrial morphology of ferroptosis, and GPX4 and 15LOX-1 showed the same change observed in cells. In conclusion, our data suggest ferroptosis is involved in the injury of the pelvic floor muscle caused by mechanical stretching, and provide a novel insight for PFD therapy.
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Affiliation(s)
- Yong He
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China
| | - Guotao Huang
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China
| | - Shasha Hong
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China
| | - Xiaohu Zuo
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China
| | - Zhihan Zhao
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China
| | - Li Hong
- Department of Gynecology and Obstetrics, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, 430060, People's Republic of China.
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Asparuhova MB, Riedwyl D, Aizawa R, Raabe C, Couso-Queiruga E, Chappuis V. Local Concentrations of TGF-β1 and IGF-1 Appear Determinant in Regulating Bone Regeneration in Human Postextraction Tooth Sockets. Int J Mol Sci 2023; 24:ijms24098239. [PMID: 37175951 PMCID: PMC10179638 DOI: 10.3390/ijms24098239] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/28/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023] Open
Abstract
Healing after tooth extraction involves a series of reparative processes affecting both alveolar bone and soft tissues. The aim of the present study was to investigate whether activation of molecular signals during the healing process confers a regenerative advantage to the extraction socket soft tissue (ESsT) at 8 weeks of healing. Compared to subepithelial connective tissue graft (CTG), qRT-PCR analyses revealed a dramatic enrichment of the ESsT in osteogenic differentiation markers. However, ESsT and CTG shared characteristics of nonspecialized soft connective tissue by expressing comparable levels of genes encoding abundant extracellular matrix (ECM) proteins. Genes encoding the transforming growth factor-β1 (TGF-β1) and its receptors were strongly enriched in the CTG, whereas the transcript for the insulin-like growth factor-1 (IGF-1) showed significantly high and comparable expression in both tissues. Mechanical stimulation, by the means of cyclic strain or matrix stiffness applied to primary ESsT cells (ESsT-C) and CTG fibroblasts (CTG-F) extracted from the tissue samples, revealed that stress-induced TGF-β1 not exceeding 2.3 ng/mL, as measured by ELISA, in combination with IGF-1 up to 2.5 ng/mL was able to induce the osteogenic potential of ESsT-Cs. However, stiff matrices (50 kPa), upregulating the TGF-β1 expression up to 6.6 ng/mL, caused downregulation of osteogenic gene expression in the ESsT-Cs. In CTG-Fs, endogenous or stress-induced TGF-β1 ≥ 4.6 ng/mL was likely responsible for the complete lack of osteogenesis. Treatment of ESsT-Cs with TGF-β1 and IGF-1 proved that, at specific concentrations, the two growth factors exhibited either an inductive-synergistic or a suppressive activity, thus determining the osteogenic and mineralization potential of ESsT-Cs. Taken together, our data strongly warrant the clinical exploration of ESsT as a graft in augmentative procedures during dental implant placement surgeries.
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Affiliation(s)
- Maria B Asparuhova
- Laboratory of Oral Cell Biology, Dental Research Center, School of Dental Medicine, University of Bern, Freiburgstrasse 3, 3010 Bern, Switzerland
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
| | - Dominic Riedwyl
- Laboratory of Oral Cell Biology, Dental Research Center, School of Dental Medicine, University of Bern, Freiburgstrasse 3, 3010 Bern, Switzerland
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
| | - Ryo Aizawa
- Laboratory of Oral Cell Biology, Dental Research Center, School of Dental Medicine, University of Bern, Freiburgstrasse 3, 3010 Bern, Switzerland
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
- Department of Periodontology, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Clemens Raabe
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
| | - Emilio Couso-Queiruga
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
| | - Vivianne Chappuis
- Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
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Secretome from In Vitro Mechanically Loaded Myoblasts Induces Tenocyte Migration, Transition to a Fibroblastic Phenotype and Suppression of Collagen Production. Int J Mol Sci 2021; 22:ijms222313089. [PMID: 34884895 PMCID: PMC8657858 DOI: 10.3390/ijms222313089] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022] Open
Abstract
It is known that mechanical loading of muscles increases the strength of healing tendon tissue, but the mechanism involved remains elusive. We hypothesized that the secretome from myoblasts in co-culture with tenocytes affects tenocyte migration, cell phenotype, and collagen (Col) production and that the effect is dependent on different types of mechanical loading of myoblasts. To test this, we used an in vitro indirect transwell co-culture system. Myoblasts were mechanically loaded using the FlexCell® Tension system. Tenocyte cell migration, proliferation, apoptosis, collagen production, and several tenocyte markers were measured. The secretome from myoblasts decreased the Col I/III ratio and increased the expression of tenocyte specific markers as compared with tenocytes cultured alone. The secretome from statically loaded myoblasts significantly enhanced tenocyte migration and Col I/III ratio as compared with dynamic loading and controls. In addition, the secretome from statically loaded myoblasts induced tenocytes towards a myofibroblast-like phenotype. Taken together, these results demonstrate that the secretome from statically loaded myoblasts has a profound influence on tenocytes, affecting parameters that are related to the tendon healing process.
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Kimura Y, Aoyama S, Ueda N, Katayama T, Ono K, Nagahama K. Covalent Cell‐Loading Injectable Hydrogel Scaffold Significantly Promotes Tissue Regeneration In Vivo Compared with a Conventional Physical Cell‐Loading Hydrogel Scaffold. Adv Biol (Weinh) 2021. [DOI: 10.1002/adbi.202000106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yuka Kimura
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
| | - Seika Aoyama
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
| | - Natsumi Ueda
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
| | - Tokitaka Katayama
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
| | - Kimika Ono
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
| | - Koji Nagahama
- Department of Nanobiochemistry Faculty of Frontiers of Innovative Research in Science and Technology (FIRST) Konan University 7‐1‐20 Minatojima‐Minamimachi Kobe 650‐0047 Japan
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Wang Y, Song J, Liu X, Liu J, Zhang Q, Yan X, Yuan X, Ren D. Multiple Effects of Mechanical Stretch on Myogenic Progenitor Cells. Stem Cells Dev 2020; 29:336-352. [PMID: 31950873 DOI: 10.1089/scd.2019.0286] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Yaqi Wang
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Jing Song
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xinqiang Liu
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Jun Liu
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Qiang Zhang
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xiao Yan
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
| | - Xiao Yuan
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Dapeng Ren
- Department of Stomatology Medical Center, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
- Department of Stomatology, Medical School of Qingdao University, Qingdao, China
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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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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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Lunn JS, Pacut C, Backus C, Hong Y, Johe K, Hefferan M, Marsala M, Feldman EL. The pleotrophic effects of insulin-like growth factor-I on human spinal cord neural progenitor cells. Stem Cells Dev 2010; 19:1983-93. [PMID: 20406098 DOI: 10.1089/scd.2010.0003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Most stem cell therapies involve direct, intraparachymal placement of neural progenitor cells. These cells provide physical support to the endogenous neuronal population and may be engineered to provide in situ growth factor support. Insulin-like growth factor-I (IGF-I) has potent neurotrophic and neuroprotective properties and is expressed by human neural stem cells (hNSCs). IGF-I is implicated in multiple aspects of cell behavior, including proliferation, differentiation, and survival. Enhancing hNSC function through IGF-I overexpression may increase the benefits of stem cell therapy. As a first step to that goal, we examined the direct effects of IGF-I on hNSC behavior in vitro. We demonstrate that IGF-I treatment enhances both the number and length of hNSC neurites. This is correlated with a decrease in proliferation, suggesting that IGF-I promotes neurite outgrowth but not proliferation. While IGF-I activates both AKT and MAPK signaling in hNSCs, we demonstrate that IGF-I-mediated neurite outgrowth is dependent only on AKT signaling. Finally, we demonstrate that IGF-I is neuroprotective after glutamate exposure in a model of excitotoxic cell death.
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Affiliation(s)
- J Simon Lunn
- Department of Neurology, University of Michigan, Ann Arbor, Michigan 48109, USA
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Abe S, Rhee S, Iwanuma O, Hiroki E, Yanagisawa N, Sakiyama K, Ide Y. Effect of Mechanical Stretching on Expressions of Muscle Specific Transcription Factors MyoD, Myf-5, Myogenin and MRF4 in Proliferated Myoblasts. Anat Histol Embryol 2009; 38:305-10. [DOI: 10.1111/j.1439-0264.2009.00945.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Liu J, Liu J, Mao J, Yuan X, Lin Z, Li Y. Caspase-3-mediated cyclic stretch-induced myoblast apoptosis via a Fas/FasL-independent signaling pathway during myogenesis. J Cell Biochem 2009; 107:834-44. [DOI: 10.1002/jcb.22182] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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12
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Kado S, Abe S, Hiroki E, Iwanuma O, Sakiyama K, Kim HJ, Ide Y. Myofiber properties of mouse mylohyoid muscle in the growth period. Zoolog Sci 2008; 25:806-10. [PMID: 18795814 DOI: 10.2108/zsj.25.806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Accepted: 05/21/2008] [Indexed: 11/17/2022]
Abstract
The mouse mylohyoid muscle belongs to the mastication-related suprahyoid muscle group. It shows a plate-like morphology and forms the mouth floor. There have been no reports on the characteristics of the mouse mylohyoid muscle fibers, and especially on their functional role during ingestion action, and many points remain unclear. We examined the mouse mylohyoid muscle at both the transcriptional and protein levels by RT-PCR, immunohistochemistry, and Western Blotting. MyHC-2b, which is expressed in almost all head and neck muscles and is thought to play a role in rapid mastication movement, was not detected in the mouse mylohyoid muscle. This result suggests that the mouse mylohyoid muscle has a special function and does not directly function during ingestion.
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Affiliation(s)
- Syoutaro Kado
- Department of Anatomy , Tokyo Dental College, Chiba-City, Chiba, Japan
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