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Nordberg RC, Mellor LF, Krause AR, Donahue HJ, Loboa EG. LRP receptors in chondrocytes are modulated by simulated microgravity and cyclic hydrostatic pressure. PLoS One 2019; 14:e0223245. [PMID: 31584963 PMCID: PMC6777824 DOI: 10.1371/journal.pone.0223245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 09/17/2019] [Indexed: 01/16/2023] Open
Abstract
Mechanical loading is essential for the maintenance of musculoskeletal homeostasis. Cartilage has been demonstrated to be highly mechanoresponsive, but the mechanisms by which chondrocytes respond to mechanical stimuli are not clearly understood. The goal of the study was to determine how LRP4, LRP5, and LRP6 within canonical Wnt-signaling are regulated in simulated microgravity and cyclic hydrostatic pressure, and to investigate the potential role of LRP 4/5/6 in cartilage degeneration. Rat chondrosacroma cell (RCS) pellets were stimulated using either cyclic hydrostatic pressure (1Hz, 7.5 MPa, 4hr/day) or simulated microgravity in a rotating wall vessel (RWV) bioreactor (11RPM, 24hr/day). LRP4/5/6 mRNA expression was assessed by RT-qPCR and LRP5 protein expression was determined by fluorescent immunostaining. To further evaluate our in vitro findings in vivo, mice were subjected to hindlimb suspension for 14 days and the femoral heads stained for LRP5 expression. We found that, in vitro, LRP4/5/6 mRNA expression is modulated in a time-dependent manner by mechanical stimulation. Additionally, LRP5 protein expression is upregulated in response to both simulated microgravity and cyclic hydrostatic pressure. LRP5 is also upregulated in vivo in the articular cartilage of hindlimb suspended mice. This is the first study to examine how LRP4/5/6, critical receptors within musculoskeletal biology, respond to mechanical stimulation. Further elucidation of this mechanism could provide significant clinical benefit for the identification of pharmaceutical targets for the maintenance of cartilage health.
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Affiliation(s)
- Rachel C. Nordberg
- College of Engineering, University of Missouri, Columbia, Missouri, United States of America
| | | | - Andrew R. Krause
- Sport Health and Physical Education, Vancouver Island University, Nanaimo, British Columbia, Canada
| | - Henry J. Donahue
- Division of Musculoskeletal Sciences, Department of Orthopaedics and Rehabilitation, Penn State College of Medicine, Hershey, Pennsylvania, United States of America
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Elizabeth G. Loboa
- College of Engineering, University of Missouri, Columbia, Missouri, United States of America
- * E-mail:
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Smith SM, Melrose J. Type XI collagen-perlecan-HS interactions stabilise the pericellular matrix of annulus fibrosus cells and chondrocytes providing matrix stabilisation and homeostasis. J Mol Histol 2019; 50:285-294. [PMID: 30993430 DOI: 10.1007/s10735-019-09823-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Accepted: 04/10/2019] [Indexed: 12/16/2022]
Abstract
The aim of this study was to ascertain whether, like many cell types in cartilaginous tissues if type XI collagen was a pericellular component of annulus fibrosus (AF) cells and chondrocytes. Fine fibrillar networks were visualised which were perlecan, HS (MAb 10E4) and type XI collagen positive. Heparitinase-III pre-digestion abolished the type XI collagen and 10E4 localisation in these fibrillar assemblies demonstrating a putative HS mediated interaction which localised the type XI collagen. Type XI collagen was confirmed to be present in the Heparitinase III treated AF monolayer media samples by immunoblotting. Heparitinase-III generated ΔHS stub epitopes throughout these fibrillar networks strongly visualised by MAb 3-G-10. Monolayers of murine hip articular chondrocytes from C57BL/6 and Hspg2 exon 3 null mice also displayed pericellular perlecan localisations, however type XI collagen was only evident in the Wild type mice. Perlecan was also immunolocalised in control and murine knee articular cartilage from the two mouse genotypes subjected to a medial meniscal destabilisation procedure which induces OA. This resulted in a severe depletion of perlecan levels particularly in the perlecan exon 3 null mice and was consistent with OA representing a disease of the pericellular matrix. A model was prepared to explain these observations between the NPP type XI collagen domain and HS chains of perlecan domain-I in the pericellular matrix of AF cells which likely contributed to cellular communication, tissue stabilization and the regulation of extracellular matrix homeostasis.
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Affiliation(s)
- Susan M Smith
- Raymond Purves Bone and Joint Research Laboratories, Level 10, Kolling Institute of Medical Research B6, The Royal North Shore Hospital, St. Leonards, NSW, 2065, Australia
| | - James Melrose
- Raymond Purves Bone and Joint Research Laboratories, Level 10, Kolling Institute of Medical Research B6, The Royal North Shore Hospital, St. Leonards, NSW, 2065, Australia. .,Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia. .,Sydney Medical School, Northern, The University of Sydney, St. Leonards, 2065, NSW, Australia. .,Faculty of Medicine and Health, Royal North Shore Hospital, University of Sydney, St. Leonards, NSW, 2065, Australia.
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3
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Huang Y, Askew EB, Knudson CB, Knudson W. CRISPR/Cas9 knockout of HAS2 in rat chondrosarcoma chondrocytes demonstrates the requirement of hyaluronan for aggrecan retention. Matrix Biol 2016; 56:74-94. [PMID: 27094859 DOI: 10.1016/j.matbio.2016.04.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 04/12/2016] [Accepted: 04/12/2016] [Indexed: 12/13/2022]
Abstract
Hyaluronan (HA) plays an essential role in cartilage where it functions to retain aggrecan. Previous studies have suggested that aggrecan is anchored indirectly to the plasma membrane of chondrocytes via its binding to cell-associated HA. However, reagents used to test these observations such as hyaluronidase and HA oligosaccharides are short term and may have side activities that complicate interpretation. Using the CRISPR/Cas9 gene editing approach, a model system was developed by generating HA-deficient chondrocyte cell lines. HA synthase-2 (Has2)-specific single guide RNA was introduced into two different variant lines of rat chondrosarcoma chondrocytes; knockout clones were isolated and characterized. Two other members of the HA synthase gene family were expressed at very low relative copy number but showed no compensatory response in the Has2 knockouts. Wild type chondrocytes of both variants exhibited large pericellular matrices or coats extending from the plasma membrane. Addition of purified aggrecan monomer expanded the size of these coats as the proteoglycan became retained within the pericellular matrix. Has2 knockout chondrocytes lost all capacity to assemble a particle-excluding pericellular matrix and more importantly, no matrices formed around the knockout cells following the addition of purified aggrecan. When grown as pellet cultures so as to generate a bioengineered neocartilage tissue, the Has2 knockout chondrocytes assumed a tightly-compacted morphology as compared to the wild type cells. When knockout chondrocytes were transduced with Adeno-ZsGreen1-mycHas2, the cell-associated pericellular matrices were restored including the capacity to bind and incorporate additional exogenous aggrecan into the matrix. These results suggest that HA is essential for aggrecan retention and maintaining cell separation during tissue formation.
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Affiliation(s)
- Yi Huang
- Department of Anatomy and Cell Biology, East Carolina University, The Brody School of Medicine, Greenville, NC 27834, USA
| | - Emily B Askew
- Department of Anatomy and Cell Biology, East Carolina University, The Brody School of Medicine, Greenville, NC 27834, USA
| | - Cheryl B Knudson
- Department of Anatomy and Cell Biology, East Carolina University, The Brody School of Medicine, Greenville, NC 27834, USA
| | - Warren Knudson
- Department of Anatomy and Cell Biology, East Carolina University, The Brody School of Medicine, Greenville, NC 27834, USA.
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Zhu XQ, Xu YH, Liao CX, Liu WG, Cheng KK, Chen JX. Differentiating the extent of cartilage repair in rabbit ears using nonlinear optical microscopy. J Microsc 2015; 260:219-26. [PMID: 26366638 DOI: 10.1111/jmi.12288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 06/09/2015] [Indexed: 11/26/2022]
Abstract
Nonlinear optical microscopy (NLOM) was used as a noninvasive and label-free tool to detect and quantify the extent of the cartilage recovery. Two cartilage injury models were established in the outer ears of rabbits that created a different extent of cartilage recovery based on the presence or absence of the perichondrium. High-resolution NLOM images were used to measure cartilage repair, specifically through spectral analysis and image texture. In contrast to a wound lacking a perichondrium, wounds with intact perichondria demonstrated significantly larger TPEF signals from cells and matrix, coarser texture indicating the more deposition of type I collagen. Spectral analysis of cells and matrix can reveal the matrix properties and cell growth. In addition, texture analysis of NLOM images showed significant differences in the distribution of cells and matrix of repaired tissues with or without perichondrium. Specifically, the decay length of autocorrelation coefficient based on TPEF images is 11.2 ± 1.1 in Wound 2 (with perichondrium) and 7.5 ± 2.0 in Wound 1 (without perichondrium), indicating coarser image texture and faster growth of cells in repaired tissues with perichondrium (p < 0.05). Moreover, the decay length of autocorrelation coefficient based on collagen SHG images also showed significant difference between Wound 2 and 1 (16.2 ± 1.2 vs. 12.2 ± 2.1, p < 0.05), indicating coarser image texture and faster deposition of collagen in repaired tissues with perichondrium (Wound 2). These findings suggest that NLOM is an ideal tool for studying cartilage repair, with potential applications in clinical medicine. NLOM can capture macromolecular details and distinguish between different extents of cartilage repair without the need for labelling agents.
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Affiliation(s)
- X Q Zhu
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, P. R. China
| | - Y H Xu
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, P. R. China
| | - C X Liao
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, P. R. China
| | - W G Liu
- Department of Orthopedics, Affiliated Union Hospital of Fujian Medical University, Fuzhou, P. R. China
| | - K K Cheng
- Institute of Bioproduct Development & Department of Bioprocess Engineering, Universiti Teknologi Malaysia, Johor, Malaysia
| | - J X Chen
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, P. R. China
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Antunes JC, Tsaryk R, Gonçalves RM, Pereira CL, Landes C, Brochhausen C, Ghanaati S, Barbosa MA, Kirkpatrick CJ. Poly(γ-Glutamic Acid) as an Exogenous Promoter of Chondrogenic Differentiation of Human Mesenchymal Stem/Stromal Cells. Tissue Eng Part A 2015; 21:1869-85. [PMID: 25760236 DOI: 10.1089/ten.tea.2014.0386] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cartilage damage and/or aging effects can cause constant pain, which limits the patient's quality of life. Although different strategies have been proposed to enhance the limited regenerative capacity of cartilage tissue, the full production of native and functional cartilaginous extracellular matrix (ECM) has not yet been achieved. Poly(γ-glutamic acid) (γ-PGA), a naturally occurring polyamino acid, biodegradable into glutamate residues, has been explored for tissue regeneration. In this work, γ-PGA's ability to support the production of cartilaginous ECM by human bone marrow mesenchymal stem/stromal cells (MSCs) and nasal chondrocytes (NCs) was investigated. MSC and NC pellets were cultured in basal medium (BM), chondrogenic medium (CM), and CM-γ-PGA-supplemented medium (CM+γ-PGA) over a period of 21 days. Pellet size/shape was monitored with time. At 14 and 21 days of culture, the presence of sulfated glycosaminoglycans (sGAGs), type II collagen (Col II), Sox-9, aggrecan, type XI collagen (Col XI), type X collagen (Col X), calcium deposits, and type I collagen (Col I) was analyzed. After excluding γ-PGA's cytotoxicity, earlier cell condensation, higher sGAG content, Col II, Sox-9 (day 14), aggrecan, and Col X (day 14) production was observed in γ-PGA-supplemented MSC cultures, with no signs of mineralization or Col I. These effects were not evident with NCs. However, Sox-9 (at day 14) and Col X (at days 14 and 21) were increased, decreased, or absent, respectively. Overall, γ-PGA improved chondrogenic differentiation of MSCs, increasing ECM production earlier in culture. It is proposed that γ-PGA incorporation in novel biomaterials has a beneficial impact on future approaches for cartilage regeneration.
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Affiliation(s)
- Joana C Antunes
- 1Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,3Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Roman Tsaryk
- 3Faculdade de Engenharia, Universidade do Porto, Porto, Portugal.,4Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Raquel M Gonçalves
- 1Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
| | - Catarina Leite Pereira
- 1Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,5ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Constantin Landes
- 6Department of Oral, Cranio-Maxillofacial and Facial Plastic Surgery, University Medical Center of the Goethe University, Frankfurt am Main, Germany.,7Sana Hospital Offenbach, Offenbach, Germany
| | - Christoph Brochhausen
- 8REPAIR Lab, Institute of Pathology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Shahram Ghanaati
- 6Department of Oral, Cranio-Maxillofacial and Facial Plastic Surgery, University Medical Center of the Goethe University, Frankfurt am Main, Germany.,7Sana Hospital Offenbach, Offenbach, Germany.,8REPAIR Lab, Institute of Pathology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Mário A Barbosa
- 1Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,2INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,5ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - C James Kirkpatrick
- 8REPAIR Lab, Institute of Pathology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
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Ben-Aderet L, Merquiol E, Fahham D, Kumar A, Reich E, Ben-Nun Y, Kandel L, Haze A, Liebergall M, Kosińska MK, Steinmeyer J, Turk B, Blum G, Dvir-Ginzberg M. Detecting cathepsin activity in human osteoarthritis via activity-based probes. Arthritis Res Ther 2015; 17:69. [PMID: 25889265 PMCID: PMC4415352 DOI: 10.1186/s13075-015-0586-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 02/25/2015] [Indexed: 02/07/2023] Open
Abstract
Introduction Lysosomal cathepsins have been reported to contribute to Osteoarthritis (OA) pathophysiology due to their increase in pro-inflammatory conditions. Given the causal role of cathepsins in OA, monitoring their specific activity could provide means for assessing OA severity. To this end, we herein sought to assess a cathepsin activity-based probe (ABP), GB123, in vitro and in vivo. Methods Protein levels and activity of cathepsins B and S were monitored by immunoblot analysis and GB123 labeling in cultured primary chondrocytes and conditioned media, following stimuli with tumor necrosis factor alpha (TNFα) and/or Interleukin 1 beta (IL-1β). Similarly, cathepsin activity was examined in sections of intact cartilage (IC) and degraded cartilage (DC) regions of OA. Finally, synovial fluid (SF) and serum from donors with no signs of diseases, early OA, late OA and rheumatoid arthritis (RA) patients were analyzed with GB123 to detect distinct activity levels of cathepsin B and S. Results Cathepsin activity in cell lysates, conditioned media explants and DC sections showed enhanced enzymatic activity of cathepsins B and S. Further histological analysis revealed that cathepsin activity was found higher in superficial zones of DC than in IC. Examining serum and SF revealed that cathepsin B is significantly elevated with OA severity in serum and SF, yet levels of cathepsin S are more correlated with synovitis and RA. Conclusions Based on our data, cathepsin activity monitored by ABPs correlated well with OA severity and joint inflammation, directing towards a novel etiological target for OA, which possesses significant translational potential in developing means for non-invasive detection of early signs of OA. Electronic supplementary material The online version of this article (doi:10.1186/s13075-015-0586-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Louisa Ben-Aderet
- Laboratory of Cartilage Biology, Institute of Dental Sciences, Hebrew University of Jerusalem, PO BOX 12272, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Emmanuelle Merquiol
- School of Pharmacy- Institute for Drug Research, Hebrew University of Jerusalem, PO BOX 12065, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Duha Fahham
- School of Pharmacy- Institute for Drug Research, Hebrew University of Jerusalem, PO BOX 12065, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Ashok Kumar
- Laboratory of Cartilage Biology, Institute of Dental Sciences, Hebrew University of Jerusalem, PO BOX 12272, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Eli Reich
- Laboratory of Cartilage Biology, Institute of Dental Sciences, Hebrew University of Jerusalem, PO BOX 12272, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Yael Ben-Nun
- School of Pharmacy- Institute for Drug Research, Hebrew University of Jerusalem, PO BOX 12065, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Leonid Kandel
- Joint Replacement and Reconstructive Surgery Unit, Orthopaedic Surgery Complex, Hadassah Mount Scopus Hospital, Jerusalem, Israel.
| | - Amir Haze
- Joint Replacement and Reconstructive Surgery Unit, Orthopaedic Surgery Complex, Hadassah Mount Scopus Hospital, Jerusalem, Israel.
| | - Meir Liebergall
- Joint Replacement and Reconstructive Surgery Unit, Orthopaedic Surgery Complex, Hadassah Mount Scopus Hospital, Jerusalem, Israel.
| | - Marta K Kosińska
- Department of Orthopaedics, Laboratory for Experimental Orthopaedics, Justus-Liebig-University of Giessen, Giessen, Germany.
| | - Juergen Steinmeyer
- Department of Orthopaedics, Laboratory for Experimental Orthopaedics, Justus-Liebig-University of Giessen, Giessen, Germany.
| | - Boris Turk
- Department of Biochemistry and Molecular and Structural Biology, Jozef Stefan Institute, Ljubljana, Slovenia.
| | - Galia Blum
- School of Pharmacy- Institute for Drug Research, Hebrew University of Jerusalem, PO BOX 12065, Ein Kerem Campus, Jerusalem, 9112001, Israel.
| | - Mona Dvir-Ginzberg
- Laboratory of Cartilage Biology, Institute of Dental Sciences, Hebrew University of Jerusalem, PO BOX 12272, Ein Kerem Campus, Jerusalem, 9112001, Israel.
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Chen J, Zhu X, Xu Y, Tang Y, Xiong S, Zhuo S, Chen J. Stereoscopic visualization and quantification of auricular cartilage regeneration in rabbits using multiphoton microscopy. SCANNING 2014; 36:540-546. [PMID: 25195587 DOI: 10.1002/sca.21153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 07/15/2014] [Indexed: 06/03/2023]
Abstract
Multiphoton microscopy (MPM) was applied for imaging and quantifying the elastic cartilage regeneration tissue in a rabbit ear model without using labeling agents. Morphology of cells and collagen matrix were analysis, showing significant difference between regenerated and intact cartilage in cellular size and collagen distribution. The results demonstrate that high resolution images provide by MPM are consistent with the histological results, and show additional biological behavior which is not visible in standard histology. Advantages in instrumentation may lead to the application of MPM for intravital detection and treatment.
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Affiliation(s)
- Jing Chen
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, P. R. China
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Zhu X, Tang Y, Chen J, Xiong S, Zhuo S, Chen J. Monitoring wound healing of elastic cartilage using multiphoton microscopy. Osteoarthritis Cartilage 2013; 21:1799-806. [PMID: 23973917 DOI: 10.1016/j.joca.2013.08.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 08/06/2013] [Accepted: 08/12/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To demonstrate the ability of multiphoton microscopy (MPM) for monitoring wound healing of elastic cartilage. METHOD In a rabbit ear model, four cartilage specimen groups at 1-day, 1-, 4-, 20-week healing time points as well as a normal elastic cartilage were examined with MPM without using labeling agents. MPM images at wound margins were obtained from specimens at different healing stages, compared with the Hematoxylin and Eosin (H&E) stained images. Image analysis was performed to characterize the collagen morphology for quantifying the wound healing progression of elastic cartilage. RESULTS MPM provided high-resolution images of elastic cartilage at varying depths. Comparisons of the images of specimens at different healing stages show obvious cell growth and matrix deposition. The results are consistent with the histological results. Moreover, quantitative analysis results show significant alteration in the collagen cavity size or collagen orientation index during wound healing of elastic cartilage, indicating the possibility to act as indicators for monitoring wound healing. CONCLUSION Our results suggested that MPM has the ability to monitor the wound healing progression of elastic cartilage, based on the visualization of cell growth and proliferation and quantitative characterization of collagen morphology during wound healing.
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Affiliation(s)
- X Zhu
- Institute of Laser and Optoelectronics Technology, Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou 350007, PR China.
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