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Carnes ME, Gonyea CR, Coburn JM, Pins GD. A biomimetic approach to modulating the sustained release of fibroblast growth factor 2 from fibrin microthread scaffolds. EXPLORATION OF BIOMAT-X 2024; 1:58-83. [PMID: 39070763 PMCID: PMC11274095 DOI: 10.37349/ebmx.2024.00006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2024]
Abstract
Aim The pleiotropic effect of fibroblast growth factor 2 (FGF2) on promoting myogenesis, angiogenesis, and innervation makes it an ideal growth factor for treating volumetric muscle loss (VML) injuries. While an initial delivery of FGF2 has demonstrated enhanced regenerative potential, the sustained delivery of FGF2 from scaffolds with robust structural properties as well as biophysical and biochemical signaling cues has yet to be explored for treating VML. The goal of this study is to develop an instructive fibrin microthread scaffold with intrinsic topographic alignment cues as well as regenerative signaling cues and a physiologically relevant, sustained release of FGF2 to direct myogenesis and ultimately enhance functional muscle regeneration. Methods Heparin was passively adsorbed or carbodiimide-conjugated to microthreads, creating a biomimetic binding strategy, mimicking FGF2 sequestration in the extracellular matrix (ECM). It was also evaluated whether FGF2 incorporated into fibrin microthreads would yield sustained release. It was hypothesized that heparin-conjugated and co-incorporated (co-inc) fibrin microthreads would facilitate sustained release of FGF2 from the scaffold and enhance in vitro myoblast proliferation and outgrowth. Results Toluidine blue staining and Fourier transform infrared spectroscopy confirmed that carbodiimide-conjugated heparin bound to fibrin microthreads in a dose-dependent manner. Release kinetics revealed that heparin-conjugated fibrin microthreads exhibited sustained release of FGF2 over a period of one week. An in vitro assay demonstrated that FGF2 released from microthreads remained bioactive, stimulating myoblast proliferation over four days. Finally, a cellular outgrowth assay suggests that FGF2 promotes increased outgrowth onto microthreads. Conclusions It was anticipated that the combined effects of fibrin microthread structural properties, topographic alignment cues, and FGF2 release profiles will facilitate the fabrication of a biomimetic scaffold that enhances the regeneration of functional muscle tissue for the treatment of VML injuries.
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Affiliation(s)
- Meagan E. Carnes
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - Cailin R. Gonyea
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - Jeannine M. Coburn
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - George D. Pins
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
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Ling M, Lai X, Quan L, Li F, Lang L, Fu Y, Feng S, Yi X, Zhu C, Gao P, Zhu X, Wang L, Shu G, Jiang Q, Wang S. Knockdown of VEGFB/VEGFR1 Signaling Promotes White Adipose Tissue Browning and Skeletal Muscle Development. Int J Mol Sci 2022; 23:ijms23147524. [PMID: 35886871 PMCID: PMC9315609 DOI: 10.3390/ijms23147524] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 02/01/2023] Open
Abstract
It has been demonstrated that vascular endothelial growth factor B (VEGFB) and vascular endothelial growth factor receptor 1 (VEGFR1) play a vital role in regulating vascular biological function. However, the role of VEGFB and VEGFR1 in regulating fat deposition and skeletal muscle growth remains unclear. Therefore, this study was conducted to investigate the effects of VEGFB and VEGFR1 on fat deposition and skeletal muscle growth in mice. Our results showed that knockdown of VEGFB decreased body weight and iWAT index, stimulated the browning of mice iWAT with increased expression of UCP1, decreased the diameters of adipocytes, and elevated energy expenditure. In contrast, knockdown of VEGFB increased gastrocnemius (GAS) muscle index with increased proliferation of GAS muscle by expression of PCNA and Cyclin D1. Meanwhile, knockdown of endothelial VEGFR1 induced the browning of iWAT with increased expression of UCP1 and decreased diameters of adipocytes. By contrast, knockdown of endothelial VEGFR1 inhibited GAS muscle differentiation with decreased expression of MyoD. In conclusion, these results suggested that the loss of VEGFB/VEGFR1 signaling is associated with enhanced browning of inguinal white adipose tissue and skeletal muscle development. These results provided new insights into the regulation of skeletal muscle growth and regeneration, as well as fat deposition, suggesting the potential application of VEGFB/VEGFR1 as an intervention for the restriction of muscle diseases and obesity and related metabolic disorders.
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Affiliation(s)
- Mingfa Ling
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Xumin Lai
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Lulu Quan
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Fan Li
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Limin Lang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Yiming Fu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Shengchun Feng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Xin Yi
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Canjun Zhu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Ping Gao
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Xiaotong Zhu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Lina Wang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Gang Shu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Qingyan Jiang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
| | - Songbo Wang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; (M.L.); (X.L.); (L.Q.); (F.L.); (L.L.); (Y.F.); (S.F.); (X.Y.); (C.Z.); (P.G.); (X.Z.); (L.W.); (G.S.); (Q.J.)
- National Engineering Research Center for the Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Correspondence: ; Tel.: +86-135-7051-8681
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Choi S, Ferrari G, Tedesco FS. Cellular dynamics of myogenic cell migration: molecular mechanisms and implications for skeletal muscle cell therapies. EMBO Mol Med 2020; 12:e12357. [PMID: 33210465 PMCID: PMC7721365 DOI: 10.15252/emmm.202012357] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 08/02/2020] [Accepted: 08/28/2020] [Indexed: 12/14/2022] Open
Abstract
Directional cell migration is a critical process underlying morphogenesis and post-natal tissue regeneration. During embryonic myogenesis, migration of skeletal myogenic progenitors is essential to generate the anlagen of limbs, diaphragm and tongue, whereas in post-natal skeletal muscles, migration of muscle satellite (stem) cells towards regions of injury is necessary for repair and regeneration of muscle fibres. Additionally, safe and efficient migration of transplanted cells is critical in cell therapies, both allogeneic and autologous. Although various myogenic cell types have been administered intramuscularly or intravascularly, functional restoration has not been achieved yet in patients with degenerative diseases affecting multiple large muscles. One of the key reasons for this negative outcome is the limited migration of donor cells, which hinders the overall cell engraftment potential. Here, we review mechanisms of myogenic stem/progenitor cell migration during skeletal muscle development and post-natal regeneration. Furthermore, strategies utilised to improve migratory capacity of myogenic cells are examined in order to identify potential treatments that may be applied to future transplantation protocols.
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Affiliation(s)
- SungWoo Choi
- Department of Cell and Developmental Biology, University College London, London, UK.,The Francis Crick Institute, London, UK
| | - Giulia Ferrari
- Department of Cell and Developmental Biology, University College London, London, UK
| | - Francesco Saverio Tedesco
- Department of Cell and Developmental Biology, University College London, London, UK.,The Francis Crick Institute, London, UK.,Dubowitz Neuromuscular Centre, Great Ormond Street Institute of Child Health, University College London, London, UK
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Silva MT, Nascimento TL, Pereira MG, Siqueira AS, Brum PC, Jaeger RG, Miyabara EH. β2-Adrenoceptor is involved in connective tissue remodeling in regenerating muscles by decreasing the activity of MMP-9. Cell Tissue Res 2016; 365:173-86. [PMID: 26896238 DOI: 10.1007/s00441-016-2373-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 02/01/2016] [Indexed: 02/04/2023]
Abstract
We investigated the role of β2-adrenoceptors in the connective tissue remodeling of regenerating muscles from β2-adrenoceptor knockout (β2KO) mice. Tibialis anterior muscles from β2KO mice were cryolesioned and analyzed after 3, 10, and 21 days. Regenerating muscles from β2KO mice showed a significant increase in the area density of the connective tissue and in the amount of collagen at 10 days compared with wild-type (WT) mice. A greater increase occurred in the expression levels of collagen I, III, and IV in regenerating muscles from β2KO mice evaluated at 10 days compared with WT mice; this increase continued at 21 days, except for collagen III. Matrix metalloproteinase (MMP-2) activity increased to a similar extent in regenerating muscles from both β2KO and WT mice at 3 and 10 days. This was also the case for MMP-9 activity in regenerating muscles from both β2KO and WT mice at 3 days; however, at 10 days post-cryolesion, this activity returned to baseline levels only in WT mice. MMP-3 activity was unaltered in regenerating muscles at 10 days. mRNA levels of tumor necrosis factor-α increased in regenerating muscles from WT and β2KO mice at 3 days and, at 10 days post-cryolesion, returned to baseline only in WT mice. mRNA levels of interleukin-6 increased in muscles from WT mice at 3 days post-cryolesion and returned to baseline at 10 days post-cryolesion but were unchanged in β2KO mice. Our results suggest that the β2-adrenoceptor contributes to collagen remodeling during muscle regeneration by decreasing MMP-9 activity.
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Affiliation(s)
- Meiricris T Silva
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes 2415, 05508-000, São Paulo, SP, Brazil
| | - Tábata L Nascimento
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes 2415, 05508-000, São Paulo, SP, Brazil
| | - Marcelo G Pereira
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes 2415, 05508-000, São Paulo, SP, Brazil
| | - Adriane S Siqueira
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Patrícia C Brum
- Department of Biodynamics, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Ruy G Jaeger
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Elen H Miyabara
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes 2415, 05508-000, São Paulo, SP, Brazil.
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5
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McGinley LM, Sims E, Lunn JS, Kashlan ON, Chen KS, Bruno ES, Pacut CM, Hazel T, Johe K, Sakowski SA, Feldman EL. Human Cortical Neural Stem Cells Expressing Insulin-Like Growth Factor-I: A Novel Cellular Therapy for Alzheimer's Disease. Stem Cells Transl Med 2016; 5:379-91. [PMID: 26744412 PMCID: PMC4807660 DOI: 10.5966/sctm.2015-0103] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 11/19/2015] [Indexed: 01/05/2023] Open
Abstract
Alzheimer's disease (AD) is the most prevalent age-related neurodegenerative disorder and a leading cause of dementia. Current treatment fails to modify underlying disease pathologies and very little progress has been made to develop effective drug treatments. Cellular therapies impact disease by multiple mechanisms, providing increased efficacy compared with traditional single-target approaches. In amyotrophic lateral sclerosis, we have shown that transplanted spinal neural stem cells (NSCs) integrate into the spinal cord, form synapses with the host, improve inflammation, and reduce disease-associated pathologies. Our current goal is to develop a similar "best in class" cellular therapy for AD. Here, we characterize a novel human cortex-derived NSC line modified to express insulin-like growth factor-I (IGF-I), HK532-IGF-I. Because IGF-I promotes neurogenesis and synaptogenesis in vivo, this enhanced NSC line offers additional environmental enrichment, enhanced neuroprotection, and a multifaceted approach to treating complex AD pathologies. We show that autocrine IGF-I production does not impact the cell secretome or normal cellular functions, including proliferation, migration, or maintenance of progenitor status. However, HK532-IGF-I cells preferentially differentiate into gamma-aminobutyric acid-ergic neurons, a subtype dysregulated in AD; produce increased vascular endothelial growth factor levels; and display an increased neuroprotective capacity in vitro. We also demonstrate that HK532-IGF-I cells survive peri-hippocampal transplantation in a murine AD model and exhibit long-term persistence in targeted brain areas. In conclusion, we believe that harnessing the benefits of cellular and IGF-I therapies together will provide the optimal therapeutic benefit to patients, and our findings support further preclinical development of HK532-IGF-I cells into a disease-modifying intervention for AD.
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Affiliation(s)
- Lisa M McGinley
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
| | - Erika Sims
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
| | - J Simon Lunn
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
| | - Osama N Kashlan
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Kevin S Chen
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Elizabeth S Bruno
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
| | - Crystal M Pacut
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
| | - Tom Hazel
- Neuralstem, Inc., Germantown, Maryland, USA
| | - Karl Johe
- Neuralstem, Inc., Germantown, Maryland, USA
| | - Stacey A Sakowski
- A. Alfred Taubman Medical Research Institute, University of Michigan, Ann Arbor, Michigan, USA
| | - Eva L Feldman
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA A. Alfred Taubman Medical Research Institute, University of Michigan, Ann Arbor, Michigan, USA
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Ferreira MM, Dewi RE, Heilshorn SC. Microfluidic analysis of extracellular matrix-bFGF crosstalk on primary human myoblast chemoproliferation, chemokinesis, and chemotaxis. Integr Biol (Camb) 2015; 7:569-79. [PMID: 25909157 PMCID: PMC4528978 DOI: 10.1039/c5ib00060b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Exposing myoblasts to basic fibroblast growth factor (bFGF), which is released after muscle injury, results in receptor phosphorylation, faster migration, and increased proliferation. These effects occur on time scales that extend across three orders of magnitude (10(0)-10(3) minutes). Finite element modeling of Transwell assays, which are traditionally used to assess chemotaxis, revealed that the bFGF gradient formed across the membrane pore is short-lived and diminishes 45% within the first minute. Thus, to evaluate bFGF-induced migration over 10(2) minutes, we employed a microfluidic assay capable of producing a stable, linear concentration gradient to perform single-cell analyses of chemokinesis and chemotaxis. We hypothesized that the composition of the underlying extracellular matrix (ECM) may affect the behavioral response of myoblasts to soluble bFGF, as previous work with other cell types has suggested crosstalk between integrin and fibroblast growth factor (FGF) receptors. Consistent with this notion, we found that bFGF significantly reduced the doubling time of myoblasts cultured on laminin but not fibronectin or collagen. Laminin also promoted significantly faster migration speeds (13.4 μm h(-1)) than either fibronectin (10.6 μm h(-1)) or collagen (7.6 μm h(-1)) without bFGF stimulation. Chemokinesis driven by bFGF further increased migration speed in a strictly additive manner, resulting in an average increase of 2.3 μm h(-1) across all ECMs tested. We observed relatively mild chemoattraction (∼67% of myoblast population) in response to bFGF gradients of 3.2 ng mL(-1) mm(-1) regardless of ECM identity. Thus, while ECM-bFGF crosstalk did impact chemoproliferation, it did not have a significant effect on chemokinesis or chemotaxis. These data suggest that the main physiological effect of bFGF on myoblast migration is chemokinesis and that changes in the surrounding ECM, resulting from aging and/or disease may impact muscle regeneration by altering myoblast migration and proliferation.
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Affiliation(s)
| | - Ruby E. Dewi
- Department of Materials Science and Engineering, Stanford University
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Shi B, Ding J, Liu Y, Zhuang X, Zhuang X, Chen X, Fu C. ERK1/2 pathway-mediated differentiation of IGF-1-transfected spinal cord-derived neural stem cells into oligodendrocytes. PLoS One 2014; 9:e106038. [PMID: 25162639 PMCID: PMC4146583 DOI: 10.1371/journal.pone.0106038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 07/23/2014] [Indexed: 11/22/2022] Open
Abstract
Spinal cord injury (SCI) is a devastating event that causes substantial morbidity and mortality, for which no fully restorative treatments are available. Stem cells transplantation offers some promise in the restoration of neurological function but with limitations. Insulin-like growth factor 1 (IGF-1) is a well-appreciated neuroprotective factor that is involved with various aspects of neural cells. Herein, the IGF-1 gene was introduced into spinal cord-derived neural stem cells (NSCs) and expressed steadily. The IGF-1-transfected NSCs exhibited higher viability and were promoted to differentiate into oligodendrocytes. Moreover, the most possible underlying mechanism, through which IGF-1 exerted its neuroprotective effects, was investigated. The result revealed that the differentiation was mediated by the IGF-1 activated extracellular signal-regulated kinases 1 and 2 (ERK1/2) and its downstream pathway. These findings provide the evidence for revealing the therapeutic merits of IGF-1-modified NSCs for SCI.
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Affiliation(s)
- Bo Shi
- Department of Spine Surgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
| | - Yi Liu
- Department of Spine Surgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Xinming Zhuang
- Department of Spine Surgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Xiuli Zhuang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
| | - Changfeng Fu
- Department of Spine Surgery, First Hospital of Jilin University, Changchun, P. R. China
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JAROCHA DANUTA, STANGEL-WOJCIKIEWICZ KLAUDIA, BASTA ANTONI, MAJKA MARCIN. Efficient myoblast expansion for regenerative medicine use. Int J Mol Med 2014; 34:83-91. [PMID: 24788458 PMCID: PMC4072397 DOI: 10.3892/ijmm.2014.1763] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 04/04/2014] [Indexed: 02/02/2023] Open
Abstract
Cellular therapy using expanded autologous myoblasts is a treatment modality for a variety of diseases. In the present study, we compared the commercial skeletal muscle cell growth medium-2 (SKGM-2) with a medium designed by our group for the expansion of skeletal myoblasts. The use of an in-house medium [DMEM/F12 medium supplemented with EGF, bFGF, HGF, insulin and dexamethasone (DFEFH)] resulted in a greater number of myoblast colonies (>50%) and a 3-, 4- and 9‑fold higher proliferation rate, eventually resulting in a 3-, 7- and 87-fold greater number of cells at the 1st, 2nd and 3rd passage, respectively, compared with the cells grown in SKGM-2 medium. The average CD56 expression level was higher in the myoblasts cultured in DFEFH than in those culturd in SKGM-2 medium. At the 3rd passage, lower expression levels of myostatin and considerably higher expression levels of myogenin were observed in the cells that were grown in DFEFH medium. The results of our study indicated that myoblasts cultured in both medium types displayed fusogenic potential at the 3rd passage. Furthermore, it was shown that cells cultured in DFEFH medium created myotubes with a considerably higher number of nuclei. Additionally, we observed that the fusion potential of the cells markedly decreased with the subsequent passages and that the morphology of the myoblasts differed between the 2 cultured media. Our data demonstrate that culture in the DFEFH medium leads to an approximately 90‑fold greater number of myoblasts, with improved morphology and greater fusion potential, compared with culture in the commercial SKGM-2 medium.
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Affiliation(s)
- DANUTA JAROCHA
- Department of Transplantation, Polish-American Institute of Pediatrics, Jagiellonian University School of Medicine, 30-663 Cracow, Poland
| | | | - ANTONI BASTA
- Department of Gynecology and Oncology, Jagiellonian University School of Medicine, 31-501 Cracow, Poland
| | - MARCIN MAJKA
- Department of Transplantation, Polish-American Institute of Pediatrics, Jagiellonian University School of Medicine, 30-663 Cracow, Poland
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Lee SH, Kim IG, Jung AR, Shrestha KR, Lee JH, Park KD, Chung BH, Kim SW, Kim KH, Lee JY. Combined effects of brain-derived neurotrophic factor immobilized poly-lactic-co-glycolic acid membrane with human adipose-derived stem cells and basic fibroblast growth factor hydrogel on recovery of erectile dysfunction. Tissue Eng Part A 2014; 20:2446-54. [PMID: 24673637 DOI: 10.1089/ten.tea.2013.0495] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Erectile dysfunction (ED) is the most frequent long-term problem after radical prostatectomy. We aimed to evaluate whether the use of combination therapy with basic fibroblast growth factor (bFGF)-hydrogel on corpus cavernosum and with adipose-derived stem cells (ADSCs) and brain-derived neurotrophic factor (BDNF)-immobilized poly-lactic-co-glycolic acid (PLGA) membrane on the cavernous nerve (CN) could improve erectile function in a rat model of bilateral cavernous nerve crush injury (BCNI). Rats were randomly divided into five groups (n=15 per group): a normal group (N group), a group receiving saline application after bilateral cavernous nerve crush injury (BCNI), a group undergoing bFGF-hydrogel injection in the corpus cavernosum after BCNI (bFGF), a group receiving ADSC application covered with BDNF-membrane after BCNI (ADSC/BDNF), and a group undergoing coadministration of bFGF-hydrogel injection and BDNF-membrane with ADSCs after BDNF (bFGF+ADSC/BDNF). Four weeks postoperatively, the erectile function was assessed by detecting the ratio of intracavernous pressure (ICP) to mean arterial pressure (MAP). Smooth muscle and collagen contents were measured using Masson's trichrome staining. Neuronal nitric oxide synthase (nNOS) expression in the dorsal penile nerve was detected by immunostaining. The protein expression of the α-smooth muscle actin (α-SMA) and the cyclic guanosine monophosphate (cGMP) level of the corpus cavernosum were quantified by western blot and cGMP assay, respectively. In the bFGF+ADSC/BDNF group, the erectile function was significantly elevated compared with the BCNI and other treated groups and showed a significantly increased smooth muscle/collagen ratio, nNOS content, α-SMA expression, and cGMP level. In particular, there were no statistical differences in the ICP/MAP ratio, smooth muscle/collagen ratio, and α-SMA and cGMP levels between the bFGF+ADSC/BDNF group and normal group. Application of the BDNF-immobilized PLGA membrane with human ADSC into the CN and bFGF-incorporated hydrogel into the corpus carvernosum improved nearly normal erectile function in a rat model of postprostatectomy ED. This result suggests that a combined application of bFGF+ADSC/BDNF might be a promising treatment for postprostatectomy ED.
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Affiliation(s)
- Seung Hwan Lee
- 1 Department of Urology, Gangnam Severance Hospital, Yousei University Health System , Seoul, Korea
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Sassoli C, Nosi D, Tani A, Chellini F, Mazzanti B, Quercioli F, Zecchi-Orlandini S, Formigli L. Defining the role of mesenchymal stromal cells on the regulation of matrix metalloproteinases in skeletal muscle cells. Exp Cell Res 2014; 323:297-313. [PMID: 24631289 DOI: 10.1016/j.yexcr.2014.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Revised: 03/01/2014] [Accepted: 03/03/2014] [Indexed: 12/11/2022]
Abstract
Recent studies indicate that mesenchymal stromal cell (MSC) transplantation improves healing of injured and diseased skeletal muscle, although the mechanisms of benefit are poorly understood. In the present study, we investigated whether MSCs and/or their trophic factors were able to regulate matrix metalloproteinase (MMP) expression and activity in different cells of the muscle tissue. MSCs in co-culture with C2C12 cells or their conditioned medium (MSC-CM) up-regulated MMP-2 and MMP-9 expression and function in the myoblastic cells; these effects were concomitant with the down-regulation of the tissue inhibitor of metalloproteinases (TIMP)-1 and -2 and with increased cell motility. In the single muscle fiber experiments, MSC-CM administration increased MMP-2/9 expression in Pax-7(+) satellite cells and stimulated their mobilization, differentiation and fusion. The anti-fibrotic properties of MSC-CM involved also the regulation of MMPs by skeletal fibroblasts and the inhibition of their differentiation into myofibroblasts. The treatment with SB-3CT, a potent MMP inhibitor, prevented in these cells, the decrease of α-smooth actin and type-I collagen expression induced by MSC-CM, suggesting that MSC-CM could attenuate the fibrogenic response through mechanisms mediated by MMPs. Our results indicate that growth factors and cytokines released by these cells may modulate the fibrotic response and improve the endogenous mechanisms of muscle repair/regeneration.
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Affiliation(s)
- Chiara Sassoli
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Daniele Nosi
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Alessia Tani
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Flaminia Chellini
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Benedetta Mazzanti
- Dept. of Experimental and Clinical Medicine-Section of Haematology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Franco Quercioli
- CNR-National Institute of Optics (INO), Largo Enrico Fermi 6, 50125 Arcetri-Florence, Italy
| | - Sandra Zecchi-Orlandini
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy
| | - Lucia Formigli
- Dept. of Experimental and Clinical Medicine-Section of Anatomy and Histology, University of Florence, Largo Brambilla, 3, 50134, Florence, Italy.
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Tremp M, Salemi S, Largo R, Andersson KE, Plock JA, Plock J, Aboushwareb T, Sulser T, Eberli D. Adipose-derived stem cells (ADSCs) and muscle precursor cells (MPCs) for the treatment of bladder voiding dysfunction. World J Urol 2013; 32:1241-8. [PMID: 24217741 DOI: 10.1007/s00345-013-1200-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 10/21/2013] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Bladder outflow obstruction (BOO) is common in the elderly and can result in bladder voiding dysfunction (BVD) due to severe bladder muscle damage. The goal of this research was to evaluate the use of adult stem cells for the treatment of BVD due to decreased muscle contractility in a rat model. MATERIALS AND METHODS Adipose-derived stem cells (ADSCs) and muscle precursor cells (MPCs) were harvested from male Lewis rats and expanded in culture. BOO was induced by tying a suture around the urethra. Six weeks after obstruction, the development of BVD was confirmed by cystometric analysis in conscious rats, histology and molecular investigations. Injection of ADSCs or MPCs into the bladder wall and synchronous deligation was performed 6 weeks after the obstruction. After stem-cell treatment, morphological and functional changes were assessed. Age-matched rats and animals without cellular therapy but deligation-only served as controls. RESULTS Voiding pressures decreased progressively 6 weeks after obstruction with increased bladder capacities. Structural changes of the detrusor muscle occurred during the time of obstruction with an increased connective tissue-to-smooth muscle ratio and decreased SMA/smoothelin expression. After stem-cell injection, improved voiding pressures and voiding volumes were observed together with recovered tissue architecture. RT-PCR and Western blotting showed an up-regulation of important contractile proteins. CONCLUSIONS We established a reliable model for BVD and demonstrated that ADSCs and MPCs can prevent pathophysiological remodelling and provide regenerated bladder tissue and function.
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Affiliation(s)
- Mathias Tremp
- Division of Urology, University Hospital Zürich (USZ), 8091, Zurich, Switzerland
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IGF-1 gene-modified muscle-derived stem cells are resistant to oxidative stress via enhanced activation of IGF-1R/PI3K/AKT signaling and secretion of VEGF. Mol Cell Biochem 2013; 386:167-75. [PMID: 24126783 DOI: 10.1007/s11010-013-1855-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 09/27/2013] [Indexed: 12/11/2022]
Abstract
Reactive oxygen species (ROS)-induced oxidative stress increases in skeletal muscle with aging and decreases the viability of implanted cells. Type 1 insulin-like growth factor (IGF-1) promotes the survival of skeletal muscle cells under oxidative stress. It is unknown whether IGF-1 protects muscle-derived stem cells (MDSCs) from oxidative stress. In this study, we genetically engineered rat MDSCs to overexpress IGF-1 and determined cell viability, apoptosis, and VEGF secretion under oxidative stress. Overexpression of IGF-1 prevented MDSCs from H2O2-induced caspase-dependent apoptotic cell death by upregulating the PI3K/AKT pathway, accompanied with an increase of NF-κB, p-NF-κB, Bcl-2, and VEGF, as well as a decrease of Bax. In contrast, pre-administration of picropodophyllinb, wortmannin, 1L-6-hydroxymethyl-chiro-inositol-2-((R)-2-O-methyl-3-O-octadecylcarbonate), or pyrrolidine-dithiocarbamate, specific inhibitors of IGF-1R, PI3K, AKT, and NF-κB, respectively, followed by treatment with H2O2, resulted in cell death of MDSCs. Our data indicated that IGF-1 suppresses apoptosis and enhances the paracrine function of MDSCs under oxidative stress via enhancing IGF-1R/PI3K/AKT signaling. Thus, IGF-1 gene-modified MDSCs present a potential application in the treatment of muscle wasting, such as urethra intrinsic sphincter deficiency.
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Roles of pro-angiogenic and anti-angiogenic factors as well as matrix metalloproteinases in healing of NSAID-induced small intestinal ulcers in rats. Life Sci 2013; 93:441-7. [PMID: 23900029 DOI: 10.1016/j.lfs.2013.07.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 07/02/2013] [Accepted: 07/18/2013] [Indexed: 12/22/2022]
Abstract
AIMS We examined changes in the expression of a pro-angiogenic factor, vascular endothelial growth factor (VEGF), and an anti-angiogenic factor, endostatin, as well as matrix metalloproteinase (MMP)-2 and MMP-9 in the rat small intestine after administration of indomethacin and investigated the roles of these factors in the healing of indomethacin-induced small intestinal ulcers. MAIN METHODS Male SD rats were given indomethacin (10mg/kg) p.o. and euthanized at various time points (3-24h and 2-7days) after the administration. To impair the healing of these lesions, low-dose of indomethacin (2mg/kg) was given p.o. once daily for 6days starting 1day after ulceration. Levels of VEGF, endostatin, MMP-2 and MMP-9 were determined by Western blotting. KEY FINDINGS The expression of both VEGF and endostatin was upregulated after the ulceration. Repeated administration of low-dose indomethacin impaired the ulcer healing with a decrease of VEGF expression and a further increase of endostatin expression, resulting in a marked decrease in the ratio of VEGF/endostatin expression. The levels of MMP-2 and MMP-9 were both significantly increased after the ulceration, but these responses were suppressed by the repeated indomethacin treatment. The healing of these ulcers was significantly delayed by the repeated administration of MMP inhibitors such as ARP-101 and SB-3CT. SIGNIFICANCE The results confirm the importance of the balance between pro-angiogenic and anti-angiogenic activities in the healing of indomethacin-induced small intestinal damage and further suggest that the increased expression of MMP-2 and MMP-9 is another important factor for ulcer healing in the small intestine.
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14
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Piao S, Kim IG, Lee JY, Hong SH, Kim SW, Hwang TK, Oh SH, Lee JH, Ra JC, Lee JY. Therapeutic effect of adipose-derived stem cells and BDNF-immobilized PLGA membrane in a rat model of cavernous nerve injury. J Sex Med 2012; 9:1968-79. [PMID: 22642440 DOI: 10.1111/j.1743-6109.2012.02760.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Cavernous nerve injury is the main reason for post-prostatectomy erectile dysfunction (ED). Stem cell and neuroprotection therapy are promising therapeutic strategy for ED. AIM To evaluate the therapeutic efficacy of adipose-derived stem cells (ADSCs) and brain-derived neurotrophic factor (BDNF) immobilized Poly-Lactic-Co-Glycolic (PLGA) membrane on the cavernous nerve in a rat model of post-prostatectomy ED. Methods. Rats were randomly divided into five groups: normal group, bilateral cavernous nerve crush injury (BCNI) group, ADSC (BCNI group with ADSCs on cavernous nerve) group, BDNF-membrane (BCNI group with BDNF/PLGA membrane on cavernous nerve) group, and ADSC/BDNF-membrane (BCNI group with ADSCs covered with BDNF/PLGA membrane on cavernous nerve) group. BDNF was controlled-released for a period of 4 weeks in a BDNF/PLGA porous membrane system. MAIN OUTCOME MEASURES Four weeks after the operation, erectile function was assessed by detecting the ratio of intra-cavernous pressure (ICP)/mean arterial pressure (MAP). Smooth muscle and collagen content were determined by Masson's trichrome staining. Neuronal nitric oxide synthase (nNOS) expression in the dorsal penile nerve was detected by immunostaining. Phospho-endothelial nitric oxide synthase (eNOS) protein expression and cyclic guanosine monophosphate (cGMP) level of the corpus cavernosum were quantified by Western blotting and cGMP assay, respectively. RESULTS In the ADSC/BDNF-membrane group, erectile function was significantly elevated, compared with the BCNI and other treated groups. ADSC/BDNF-membrane treatment significantly increased smooth muscle/collagen ratio, nNOS content, phospho-eNOS protein expression, and cGMP level, compared with the BCNI and other treated groups. CONCLUSIONS ADSCs with BDNF-membrane on the cavernous nerve can improve erectile function in a rat model of post-prostatectomy ED, which may be used as a novel therapy for post-prostatectomy ED.
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Affiliation(s)
- Shuyu Piao
- Department of Urology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Zimowska M, Olszynski KH, Swierczynska M, Streminska W, Ciemerych MA. Decrease of MMP-9 activity improves soleus muscle regeneration. Tissue Eng Part A 2012; 18:1183-92. [PMID: 22429194 DOI: 10.1089/ten.tea.2011.0459] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The regeneration of skeletal muscles relies on the function of satellite cells that are quiescent myogenic precursors associated with adult skeletal muscle fibers. Upon injury, the satellite cells are activated, divide extensively, and differentiate into new myofibers. These events are accompanied by the remodeling of the surrounding extracellular matrix, which is mediated by variety of factors, including matrix metalloproteinases (MMPs). Regeneration of certain type of muscles, such as Soleus slow twitch muscle, is often inefficient and hindered by the development of fibrosis. Here, we studied the effect of inhibition of MMP-9 and MMP-2 activity on the Soleus muscle regeneration in vivo and on the in vitro differentiation of myoblasts derived from this muscle. Using in situ and in-gel zymography, we tested the activity of these two MMPs in vivo, during regeneration of the muscle, and in vitro, during differentiation of the myoblasts. We also analyzed the histology of regenerating muscles and morphology of differentiating myoblasts. All these analyses showed that treatment with doxycycline and anti-MMP-9, but not MMP-2 antibody, significantly improved Soleus muscle regeneration and ameliorated development of excessive fibrosis, as well as delayed myoblast proliferation and differentiation in vitro.
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Affiliation(s)
- Malgorzata Zimowska
- Department of Cytology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
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Gerard C, Forest MA, Beauregard G, Skuk D, Tremblay JP. Fibrin Gel Improves the Survival of Transplanted Myoblasts. Cell Transplant 2012; 21:127-37. [DOI: 10.3727/096368911x576018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is the most frequent muscular dystrophy in children and young adults. Currently, there is no cure for the disease. The transplantation of healthy myoblasts is an experimental therapeutic strategy, since it could restore the expression of dystrophin in DMD muscles. Nevertheless, this cellular therapy is limited by immune reaction, low migration of the implanted cells, and high early cell death that could be at least partially due to anoikis. To avoid the lack of attachment of the cells to an extracellular matrix after the transplantation, which is the cause of anoikis, we tested the use of a fibrin gel for myoblast transplantation. In vitro, three concentrations of fibrinogen were compared (3, 20, and 50 mg/ml) to form a fibrin gel. A stiffer fibrin gel leads to less degradability and less proliferation of the cells. A concentration of 3 mg/ml fibrin gel enhanced the differentiation of the myoblasts earlier as a culture in monolayer. Human myoblasts were also transplanted in muscles of Rag/mdx mice in a fibrin gel or in a saline solution (control). The use of 3 mg/ml fibrin gel for cell transplantation increased not only the survival of the cells as measured after 5 days but also the number of fibers expressing dystrophin after 21 days, compared to the control. Moreover, the fibrin gel was also compared to a prosurvival cocktail. The survival of the myoblasts at 5 days was increased in both conditions compared to the control but the efficacy of the prosurvival cocktail was not significantly higher than the fibrin gel.
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Affiliation(s)
- Catherine Gerard
- Neurosciences Division-Human Genetics, CHUQ Research Centre-CHUL, Quebec, Canada
| | - Marie Anne Forest
- Neurosciences Division-Human Genetics, CHUQ Research Centre-CHUL, Quebec, Canada
| | - Genevieve Beauregard
- Neurosciences Division-Human Genetics, CHUQ Research Centre-CHUL, Quebec, Canada
| | - Daniel Skuk
- Neurosciences Division-Human Genetics, CHUQ Research Centre-CHUL, Quebec, Canada
| | - Jacques P. Tremblay
- Neurosciences Division-Human Genetics, CHUQ Research Centre-CHUL, Quebec, Canada
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Abstract
Mouse bladder wall injection is a useful technique to orthotopically study bladder phenomena, including stem cell, smooth muscle, and cancer biology. Before starting injections, the surgical area must be cleaned with soap and water and antiseptic solution. Surgical equipment must be sterilized before use and between each animal. Each mouse is placed under inhaled isoflurane anesthesia (2-5% for induction, 1-3% for maintenance) and its bladder exposed by making a midline abdominal incision with scissors. If the bladder is full, it is partially decompressed by gentle squeezing between two fingers. The cell suspension of interest is intramurally injected into the wall of the bladder dome using a 29 or 30 gauge needle and 1 cc or smaller syringe. The wound is then closed using wound clips and the mouse allowed to recover on a warming pad. Bladder wall injection is a delicate microsurgical technique that can be mastered with practice.
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Affiliation(s)
- Chi-Ling Fu
- Department of Urology, Stanford University School of Medicin, USA
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Attia M, Mohamed A, Huet E, Eric H, Delbé J, Jean D, Ledoux D, Dominique L, Menashi S, Suzanne M, Martelly I, Isabelle M. Extracellular matrix metalloproteinase inducer (EMMPRIN/CD147) as a novel regulator of myogenic cell differentiation. J Cell Physiol 2010; 226:141-9. [PMID: 20648565 DOI: 10.1002/jcp.22315] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Matrix metalloproteinases (MMPs) are thought to play an important role in skeletal muscle cell growth and differentiation. In view of the MMP inducing function of EMMPRIN/CD147, its role in myogenic cell differentiation was investigated. EMMPRIN level increased during differentiation of both rat primary myoblasts derived from satellite cells and mouse C2.7 myogenic cells and was associated with an alteration in its molecular forms. In parallel, expression of pro-MMP-9 gradually decreased and that of pro-MMP-2 and active MMP-2 increased. While small interfering RNA (siRNA) inhibition of EMMPRIN expression accelerated cell differentiation, exogenously added recombinant EMMPRIN inhibited differentiation by an MMP-mediated mechanism, as the MMP inhibitor marimastat abrogated EMMPRIN's effect. Our results further suggest that EMMPRIN regulates differentiation through an MMP activation of transforming growth factor beta (TGFβ), a known inhibitor of myoblast's differentiation, as the increased activation and signaling of TGFβ by EMMPRIN was attenuated in the presence of marimastat. EMMPRIN inhibition may thus represent a novel strategy in the treatment of muscular degenerative disorders.
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Affiliation(s)
- Mohamed Attia
- Laboratoire CRRET, CNRS EAC 7149, Université Paris-Est Créteil, Créteil, France
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Zhao W, Zhang C, Jin C, Zhang Z, Kong D, Xu W, Xiu Y. Periurethral injection of autologous adipose-derived stem cells with controlled-release nerve growth factor for the treatment of stress urinary incontinence in a rat model. Eur Urol 2010; 59:155-63. [PMID: 21050657 DOI: 10.1016/j.eururo.2010.10.038] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Accepted: 10/15/2010] [Indexed: 12/11/2022]
Abstract
BACKGROUND Stem cell therapy is a promising therapeutic strategy for stress urinary incontinence (SUI). However, its current efficacy is insufficient. OBJECTIVE We designed a stem cell transplantation system that contains autologous adipose-derived stem cells (ADSC) and controlled-release nerve growth factor (NGF). We evaluated whether this system could enhance the therapeutic efficacy of ADSCs by periurethral coinjection in SUI rats. DESIGN, SETTING, AND PARTICIPANTS We first tested for the presence of NGF receptors in rat ADSCs and observed the effect of NGF on ADSCs in vitro and in vivo. NGF was encapsulated within poly(lactic-co-glycolic acid-PLGA) microspheres (PLGA/NGF) to control its release. SUI was created in rats, and ADSCs were harvested, cultured from fat tissue, and retained for later transplantation. SUI rats then received different forms of periurethral injection therapy. Their urodynamic index was monitored. Eight weeks after injection, the SUI rats were sacrificed and their urethra removed for histologic evaluation. INTERVENTION Forty SUI rats were allocated to five groups for receiving periurethral injection with phosphate-buffered saline (PBS), ADSC, ADSC+PLGA, ADSC+NGF, or ADSC+PLGA/NGF. Bladder capacities, abdominal leak point pressure (ALPP), and retrograde urethral perfusion pressure (RUPP) were reassessed at 2, 6, and 8 wk after injection. MEASUREMENTS The rat SUI model was generated by bilateral pudendal nerve transection (PNT). Real-time polymerase chain reaction (RT-PCR) and western blotting detected the NGF receptor Ark-A. The regeneration of muscles and peripheral nerves was evaluated by Masson's trichrome and immunohistochemical staining. RESULTS AND LIMITATIONS Results revealed the presence of the NGF receptor Trk-A on rat ADSCs. Short-term observations showed that NGF could improve ADSCs' viability in vitro and in vivo. ADSCs delivered intramuscularly into the urethra in combination with PLGA/NGF resulted in significant improvements in ALPP and RUPP as well as the amount of muscle and ganglia. There was a significant difference between the ADSC+PLGA/NGF group and other groups. CONCLUSIONS Periurethral coinjection of autologous ADSCs with controlled-release NGF may be a potential strategy for SUI treatment.
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Affiliation(s)
- Weiming Zhao
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
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