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Surovtseva MA, Krasner KY, Kim II, Surovtsev NV, Chepeleva EV, Bondarenko NA, Lykov AP, Bgatova NP, Alshevskaya AA, Trunov AN, Chernykh VV, Poveshchenko OV. Reversed Corneal Fibroblasts Therapy Restores Transparency of Mouse Cornea after Injury. Int J Mol Sci 2024; 25:7053. [PMID: 39000162 PMCID: PMC11241278 DOI: 10.3390/ijms25137053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 06/19/2024] [Accepted: 06/24/2024] [Indexed: 07/16/2024] Open
Abstract
Cell-based therapies using corneal stromal stem cells (CSSC), corneal keratocytes, or a combination of both suppress corneal scarring. The number of quiescent keratocytes in the cornea is small; it is difficult to expand them in vitro in quantities suitable for transplantation. This study examined the therapeutic effect of corneal fibroblasts reversed into keratocytes (rCF) in a mouse model of mechanical corneal injury. The therapeutic effect of rCF was studied in vivo (slit lamp, optical coherence tomography) and ex vivo (transmission electron microscopy and immunofluorescence staining). Injection of rCF into the injured cornea was accompanied by recovery of corneal thickness, improvement of corneal transparency, reduction of type III collagen in the stroma, absence of myofibroblasts, and the improvement in the structural organization of collagen fibers. TEM results showed that 2 months after intrastromal injection of cells, there was a decrease in the fibril density and an increase in the fibril diameter and the average distance between collagen fibrils. The fibrils were well ordered and maintained the short-range order and the number of nearest-neighbor fibrils, although the averaged distance between them increased. Our results demonstrated that the cell therapy of rCF from ReLEx SMILe lenticules promotes the recovery of transparent corneal stroma after injury.
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Affiliation(s)
- Maria A Surovtseva
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Kristina Yu Krasner
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
- Novosibirsk Branch of S. Fedorov Eye Microsurgery Federal State Institution, 10 Kolkhidskaya Str., 630096 Novosibirsk, Russia
| | - Irina I Kim
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Nikolay V Surovtsev
- Institute of Automation and Electrometry, Russian Academy of Sciences, 1 Academician Koptyug St., 630090 Novosibirsk, Russia
| | - Elena V Chepeleva
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Natalia A Bondarenko
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Alexander P Lykov
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Nataliya P Bgatova
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
| | - Alina A Alshevskaya
- Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Russian Federation, 2, Building 4 Bolshaya Pirogovskaya St., 119048 Moscow, Russia
| | - Alexander N Trunov
- Novosibirsk Branch of S. Fedorov Eye Microsurgery Federal State Institution, 10 Kolkhidskaya Str., 630096 Novosibirsk, Russia
| | - Valery V Chernykh
- Novosibirsk Branch of S. Fedorov Eye Microsurgery Federal State Institution, 10 Kolkhidskaya Str., 630096 Novosibirsk, Russia
| | - Olga V Poveshchenko
- Research Institute of Clinical and Experimental Lymphology Branch of Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, 2 Timakova Str., 630060 Novosibirsk, Russia
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2
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Williams S, Ligas C, Oloff L, Klein TE. The Role of Epigenomics in Mapping Potential Precursors for Foot and Ankle Tendinopathy: A Systematic Review. Foot Ankle Spec 2023; 16:446-454. [PMID: 37165881 DOI: 10.1177/19386400231170967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Tendinopathy of the foot and ankle is a common clinical problem for which the exact etiology is poorly understood. The field of epigenetics has been a recent focus of this investigation. The purpose of this article was to review the genomic advances in foot and ankle tendinopathy that could potentially be used to stratify disease risk and create preventative or therapeutic agents. A multi-database search of PubMed, Cochrane, Google Scholar, and clinicaltrials.gov from January 1, 2000 to July 1, 2022 was performed. A total of 18 articles met inclusion and exclusion criteria for this review. The majority of such research utilized case-control candidate gene association to identify different genetic risk factors associated with chronic tendinopathy. Polymorphisms in collagen genes COL5A1, COL27A1, and COL1A1 were noted at a significantly higher frequency in Achilles tendinopathy versus control groups. Other allelic variations that were observed at an increased incidence in Achilles tendinopathy were TNC and CASP8. The extracellular matrix (ECM) demonstrated macroscopic changes in Achilles tendinopathy, including an increase in aggrecan and biglycan mRNA expression, and increased expression of multiple matrix metalloproteinases. Cytokine expression was also influenced in pathology and aberrantly demonstrated dynamic response to mechanical load. The pathologic accumulation of ECM proteins and cytokine expression alters the adaptive response normal tendon has to physiologic stress, further propagating the risk for tendinopathy. By identifying and understanding the epigenetic mediators that lead to tendinopathy, therapeutic agents can be developed to target the exact underlying etiology and minimize side effects.Level of Evidence: Level IV: Systematic Review of Level II-IV Studies.
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Affiliation(s)
- Samantha Williams
- Department of Podiatric Surgery, Silicon Valley Reconstructive Foot and Ankle Fellowship, Palo Alto Medical Foundation, Mountain View, California
| | - Chandler Ligas
- Department of Podiatric Surgery, Silicon Valley Reconstructive Foot and Ankle Fellowship, Palo Alto Medical Foundation, Mountain View, California
| | - Lawrence Oloff
- Department of Podiatric Surgery, Silicon Valley Reconstructive Foot and Ankle Fellowship, Palo Alto Medical Foundation, Mountain View, California
- St. Mary's Medical Center, San Francisco, California
| | - Teri E Klein
- Departments of Biomedical Data Science and Medicine, Stanford Center for Biomedical Informatics Research (BMIR), and Stanford University, Stanford, California
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Gertych A, Walts AE, Cheng K, Liu M, John J, Lester J, Karlan BY, Orsulic S. Dynamic Changes in the Extracellular Matrix in Primary, Metastatic, and Recurrent Ovarian Cancers. Cells 2022; 11:3769. [PMID: 36497028 PMCID: PMC9736731 DOI: 10.3390/cells11233769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Cancer-associated fibroblasts (CAFs) and their extracellular matrix are active participants in cancer progression. While it is known that functionally different subpopulations of CAFs co-exist in ovarian cancer, it is unclear whether certain CAF subsets are enriched during metastatic progression and/or chemotherapy. Using computational image analyses of patient-matched primary high-grade serous ovarian carcinomas, synchronous pre-chemotherapy metastases, and metachronous post-chemotherapy metastases from 42 patients, we documented the dynamic spatiotemporal changes in the extracellular matrix, fibroblasts, epithelial cells, immune cells, and CAF subsets expressing different extracellular matrix components. Among the different CAF subsets, COL11A1+ CAFs were associated with linearized collagen fibers and exhibited the greatest enrichment in pre- and post-chemotherapy metastases compared to matched primary tumors. Although pre- and post-chemotherapy metastases were associated with increased CD8+ T cell infiltration, the infiltrate was not always evenly distributed between the stroma and cancer cells, leading to an increased frequency of the immune-excluded phenotype where the majority of CD8+ T cells are present in the tumor stroma but absent from the tumor parenchyma. Overall, most of the differences in the tumor microenvironment were observed between primary tumors and metastases, while fewer differences were observed between pre- and post-treatment metastases. These data suggest that the tumor microenvironment is largely determined by the primary vs. metastatic location of the tumor while chemotherapy does not have a significant impact on the host microenvironment.
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Affiliation(s)
- Arkadiusz Gertych
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Faculty of Biomedical Engineering, Silesian University of Technology, 44-100 Zabrze, Poland
| | - Ann E. Walts
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Keyi Cheng
- Department of Mathematics, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Manyun Liu
- Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, GA 30458, USA
| | - Joshi John
- Department of Veterans Affairs, Greater Los Angeles Healthcare System, Los Angeles, CA 90095, USA
| | - Jenny Lester
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Beth Y. Karlan
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Sandra Orsulic
- Department of Veterans Affairs, Greater Los Angeles Healthcare System, Los Angeles, CA 90095, USA
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, USA
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4
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Mienaltowski MJ, Gonzales NL, Beall JM, Pechanec MY. Basic Structure, Physiology, and Biochemistry of Connective Tissues and Extracellular Matrix Collagens. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:5-43. [PMID: 34807414 DOI: 10.1007/978-3-030-80614-9_2] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The physiology of connective tissues like tendons and ligaments is highly dependent upon the collagens and other such extracellular matrix molecules hierarchically organized within the tissues. By dry weight, connective tissues are mostly composed of fibrillar collagens. However, several other forms of collagens play essential roles in the regulation of fibrillar collagen organization and assembly, in the establishment of basement membrane networks that provide support for vasculature for connective tissues, and in the formation of extensive filamentous networks that allow for cell-extracellular matrix interactions as well as maintain connective tissue integrity. The structures and functions of these collagens are discussed in this chapter. Furthermore, collagen synthesis is a multi-step process that includes gene transcription, translation, post-translational modifications within the cell, triple helix formation, extracellular secretion, extracellular modifications, and then fibril assembly, fibril modifications, and fiber formation. Each step of collagen synthesis and fibril assembly is highly dependent upon the biochemical structure of the collagen molecules created and how they are modified in the cases of development and maturation. Likewise, when the biochemical structures of collagens or are compromised or these molecules are deficient in the tissues - in developmental diseases, degenerative conditions, or injuries - then the ultimate form and function of the connective tissues are impaired. In this chapter, we also review how biochemistry plays a role in each of the processes involved in collagen synthesis and assembly, and we describe differences seen by anatomical location and region within tendons. Moreover, we discuss how the structures of the molecules, fibrils, and fibers contribute to connective tissue physiology in health, and in pathology with injury and repair.
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Affiliation(s)
| | - Nicole L Gonzales
- Department of Animal Science, University of California Davis, Davis, CA, USA
| | - Jessica M Beall
- Department of Animal Science, University of California Davis, Davis, CA, USA
| | - Monica Y Pechanec
- Department of Animal Science, University of California Davis, Davis, CA, USA
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5
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Leduc C, Dupont L, Joannes L, Monseur C, Baiwir D, Mazzucchelli G, Deroanne C, Colige A, Bekhouche M. In vivo N-Terminomics Highlights Novel Functions of ADAMTS2 and ADAMTS14 in Skin Collagen Matrix Building. Front Mol Biosci 2021; 8:643178. [PMID: 33816558 PMCID: PMC8017238 DOI: 10.3389/fmolb.2021.643178] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
A disintegrin and metalloproteinase with thrombospondin type I motif (ADAMTS)2 and ADAMTS14 were originally known for their ability to cleave the aminopropeptides of fibrillar collagens. Previous work using N-terminomic approach (N-TAILS) in vitro led to the identification of new substrates, including some molecules involved in TGF-β signaling. Here, N-TAILS was used to investigate the substrates of these two enzymes in vivo, by comparing the N-terminomes of the skin of wild type mice, mice deficient in ADAMTS2, in ADAMTS14 and in both ADAMTS2 and ADAMTS14. This study identified 68 potential extracellular and cell surface proteins, with the majority of them being cleaved by both enzymes. These analyses comfort their role in collagen matrix organization and suggest their implication in inflammatory processes. Regarding fibrillar collagen, this study demonstrates that both ADAMTS2 and ADAMTS14 are involved in the processing of the aminopropeptide of alpha1 and alpha2 type V collagen. It also revealed the existence of several cleavage sites in the Col1 domain and in the C-propeptide of type I collagens. In addition to collagens and other extracellular proteins, two major components of the cell cytoskeleton, actin and vimentin, were also identified as potential substrates. The latter data were confirmed in vitro using purified enzymes and could potentially indicate other functions for ADAMTS2 and 14. This original investigation of mouse skin degradomes by N-terminomic highlights the essential role of ADAMTS2 and ADAMTS14 in collagen matrix synthesis and turnover, and gives clues to better understand their functions in skin pathophysiology. Data are available via ProteomeXchange with identifier PXD022179.
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Affiliation(s)
- Cédric Leduc
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Laura Dupont
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Loïc Joannes
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Christine Monseur
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Dominique Baiwir
- GIGA Proteomic Facility, GIGA-Interdisciplinary Cluster for Applied Genoproteomics, University of Liège, Liège, Belgium
| | - Gabriel Mazzucchelli
- GIGA Proteomic Facility, GIGA-Interdisciplinary Cluster for Applied Genoproteomics, University of Liège, Liège, Belgium
| | - Christophe Deroanne
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Alain Colige
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Mourad Bekhouche
- Laboratory of Connective Tissues Biology, GIGA-Cancer, University of Liège, Liège, Belgium.,Tissue Biology and Therapeutic Engineering, Centre National de la Recherche Scientifique/University of Lyon Unité Mixte de Recherche 5305, Lyon, France.,Faculté d'Odontologie de Lyon, Université de Lyon, Université Lyon 1, Lyon, France
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6
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Wu Y, Cao Y, Xu K, Zhu Y, Qiao Y, Wu Y, Chen J, Li C, Zeng R, Ge G. Dynamically remodeled hepatic extracellular matrix predicts prognosis of early-stage cirrhosis. Cell Death Dis 2021; 12:163. [PMID: 33558482 PMCID: PMC7870969 DOI: 10.1038/s41419-021-03443-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/12/2021] [Accepted: 01/15/2021] [Indexed: 12/17/2022]
Abstract
Liver cirrhosis remains major health problem. Despite the progress in diagnosis of asymptomatic early-stage cirrhosis, prognostic biomarkers are needed to identify cirrhotic patients at high risk developing advanced stage disease. Liver cirrhosis is the result of deregulated wound healing and is featured by aberrant extracellular matrix (ECM) remodeling. However, it is not comprehensively understood how ECM is dynamically remodeled in the progressive development of liver cirrhosis. It is yet unknown whether ECM signature is of predictive value in determining prognosis of early-stage liver cirrhosis. In this study, we systematically analyzed proteomics of decellularized hepatic matrix and identified four unique clusters of ECM proteins at tissue damage/inflammation, transitional ECM remodeling or fibrogenesis stage in carbon tetrachloride-induced liver fibrosis. In particular, basement membrane (BM) was heavily deposited at the fibrogenesis stage. BM component minor type IV collagen α5 chain expression was increased in activated hepatic stellate cells. Knockout of minor type IV collagen α5 chain ameliorated liver fibrosis by hampering hepatic stellate cell activation and promoting hepatocyte proliferation. ECM signatures were differentially enriched in the biopsies of good and poor prognosis early-stage liver cirrhosis patients. Clusters of ECM proteins responsible for homeostatic remodeling and tissue fibrogenesis, as well as basement membrane signature were significantly associated with disease progression and patient survival. In particular, a 14-gene signature consisting of basement membrane proteins is potent in predicting disease progression and patient survival. Thus, the ECM signatures are potential prognostic biomarkers to identify cirrhotic patients at high risk developing advanced stage disease.
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Affiliation(s)
- Yuexin Wu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Yuyan Cao
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Keren Xu
- University of Chinese Academy of Sciences, 100049, Beijing, China
- CAS Key Laboratory of Systems Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
| | - Yue Zhu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Yuemei Qiao
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
| | - Yanjun Wu
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
| | - Jianfeng Chen
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China
- School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 310024, Hangzhou, China
| | - Chen Li
- CAS Key Laboratory of Systems Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China.
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China.
| | - Rong Zeng
- CAS Key Laboratory of Systems Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China.
- CAS Key Laboratory of Systems Biology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 310024, Hangzhou, China.
- School of Life Science and Technology, Shanghai Tech University, 201210, Shanghai, China.
| | - Gaoxiang Ge
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, 200031, Shanghai, China.
- School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 310024, Hangzhou, China.
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7
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Siadat SM, Zamboulis DE, Thorpe CT, Ruberti JW, Connizzo BK. Tendon Extracellular Matrix Assembly, Maintenance and Dysregulation Throughout Life. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:45-103. [PMID: 34807415 DOI: 10.1007/978-3-030-80614-9_3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In his Lissner Award medal lecture in 2000, Stephen Cowin asked the question: "How is a tissue built?" It is not a new question, but it remains as relevant today as it did when it was asked 20 years ago. In fact, research on the organization and development of tissue structure has been a primary focus of tendon and ligament research for over two centuries. The tendon extracellular matrix (ECM) is critical to overall tissue function; it gives the tissue its unique mechanical properties, exhibiting complex non-linear responses, viscoelasticity and flow mechanisms, excellent energy storage and fatigue resistance. This matrix also creates a unique microenvironment for resident cells, allowing cells to maintain their phenotype and translate mechanical and chemical signals into biological responses. Importantly, this architecture is constantly remodeled by local cell populations in response to changing biochemical (systemic and local disease or injury) and mechanical (exercise, disuse, and overuse) stimuli. Here, we review the current understanding of matrix remodeling throughout life, focusing on formation and assembly during the postnatal period, maintenance and homeostasis during adulthood, and changes to homeostasis in natural aging. We also discuss advances in model systems and novel tools for studying collagen and non-collagenous matrix remodeling throughout life, and finally conclude by identifying key questions that have yet to be answered.
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Affiliation(s)
| | - Danae E Zamboulis
- Institute of Life Course and Medical Sciences, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK
| | - Chavaunne T Thorpe
- Comparative Biomedical Sciences, The Royal Veterinary College, University of London, London, UK
| | - Jeffrey W Ruberti
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Brianne K Connizzo
- Department of Biomedical Engineering, Boston University, Boston, MA, USA.
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8
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Kamil S, Mohan RR. Corneal stromal wound healing: Major regulators and therapeutic targets. Ocul Surf 2020; 19:290-306. [PMID: 33127599 DOI: 10.1016/j.jtos.2020.10.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/16/2020] [Accepted: 10/25/2020] [Indexed: 12/12/2022]
Abstract
Corneal stromal wound healing is a complex event that occurs to restore the transparency of an injured cornea. It involves immediate apoptosis of keratocytes followed by their activation, proliferation, migration, and trans-differentiation to myofibroblasts. Myofibroblasts contract to close the wound and secrete extracellular matrix and proteinases to remodel it. Released proteinases may degenerate the basement membrane allowing an influx of cytokines from overlying epithelium. Immune cells infiltrate the wound to clear cellular debris and prevent infections. Gradually basement membrane regenerates, myofibroblasts and immune cells disappear, abnormal matrix is resorbed, and transparency of the cornea is restored. Often this cascade deregulates and corneal opacity results. Factors that prevent corneal opacity after an injury have always intrigued the researchers. They hold clinical relevance as they can guide the outcomes of corneal surgeries. Studies in the past have shed light on the role of various factors in stromal healing. TGFβ (transforming growth factor-beta) signaling is the central player guiding stromal responses. Other major regulators include myofibroblasts, basement membrane, collagen fibrils, small leucine-rich proteoglycans, biophysical cues, proteins derived from extracellular matrix, and membrane channels. The knowledge about their roles helped to develop novel therapies to prevent corneal opacity. This article reviews the role of major regulators that determine the outcome of stromal healing. It also discusses emerging therapies that modulate the role of these regulators to prevent stromal opacity.
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Affiliation(s)
- Sabeeh Kamil
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, USA; One-Health Vision Research Program, Department of Veterinary Medicine & Surgery and Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - Rajiv R Mohan
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, USA; One-Health Vision Research Program, Department of Veterinary Medicine & Surgery and Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA; Mason Eye Institute, School of Medicine, University of Missouri, Columbia, MO, USA.
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9
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Liao X, Falcon ND, Mohammed AA, Paterson YZ, Mayes AG, Guest DJ, Saeed A. Synthesis and Formulation of Four-Arm PolyDMAEA-siRNA Polyplex for Transient Downregulation of Collagen Type III Gene Expression in TGF-β1 Stimulated Tenocyte Culture. ACS OMEGA 2020; 5:1496-1505. [PMID: 32010823 PMCID: PMC6990625 DOI: 10.1021/acsomega.9b03216] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
The natural healing process for tendon repair is associated with high upregulation of collagen type III, leading to scar tissue and tendon adhesions with functionally deficient tendons. Gene delivery systems are widely reported as potential nanotherapeutics to treat diseases, providing a promising approach to modulate collagen type III synthesis. This work investigates a proof-of-concept four-arm cationic polymer-siRNA polyplex to mediate a transient downregulation of collagen type III expression in a tendon cell culture system. The tendon culture system was first supplemented with TGF-β1 to stimulate the upregulation of collagen type III prior to silencing experiments. The four-arm poly[2-(dimethylamino) ethyl acrylate] (PDMAEA) polymer was successfully synthesized via RAFT polymerization and then mixed with siRNA to formulate the PDMAEA-siRNA polyplexes. The formation of the polyplex was optimized for the N:P ratio (10:1) and confirmed by agarose gel electrophoresis. The size and solution behavior of the polyplex were analyzed by dynamic light scattering and zeta potential, showing a hydrodynamic diameter of 155 ± 21 nm and overall positive charge of +30 mV at physiological pH. All the polyplex concentrations used had a minimal effect on the metabolic activity of cultured cells, indicating good biocompatibility. The dose and time effects of the TGF-β1 on collagen type III gene expressions were analyzed by qPCR, showing an optimal dose of 10 ng mL-1 TGF-β1 and 3-fold increase of COL3α1 expression at 48 h in cultured tenocytes. The PDMAEA-siRNA polyplex concept observed a limited yet successful and promising efficiency in silencing collagen type III at 48 h compared to PEI-siRNA. Therefore, this concept is a promising approach to reduce tissue scarring and adhesion following injuries.
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Affiliation(s)
- Xin Liao
- School
of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, U.K.
| | - Noelia D Falcon
- School
of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, U.K.
| | - Ali A Mohammed
- School
of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, U.K.
| | - Yasmin Z. Paterson
- Animal
Health Trust, Lanwades Park,
Kentford, Newmarket, Suffolk CB8 7UU, U.K.
- Department
of Veterinary Medicine, University of Cambridge, Cambridgeshire CB3 0ES, U.K.
| | | | - Deborah J. Guest
- Animal
Health Trust, Lanwades Park,
Kentford, Newmarket, Suffolk CB8 7UU, U.K.
| | - Aram Saeed
- School
of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, U.K.
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10
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Massoudi D, Malecaze F, Galiacy SD. Collagens and proteoglycans of the cornea: importance in transparency and visual disorders. Cell Tissue Res 2015. [PMID: 26205093 DOI: 10.1007/s00441-015-2233-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The cornea represents the external part of the eye and consists of an epithelium, a stroma and an endothelium. Due to its curvature and transparency this structure makes up approximately 70% of the total refractive power of the eye. This function is partly made possible by the particular organization of the collagen extracellular matrix contained in the corneal stroma that allows a constant refractive power. The maintenance of such an organization involves other molecules such as type V collagen, FACITs (fibril-associated collagens with interrupted triple helices) and SLRPs (small leucine-rich proteoglycans). These components play crucial roles in the preservation of the correct organization and function of the cornea since their absence or modification leads to abnormalities such as corneal opacities. Thus, the aim of this review is to describe the different corneal collagens and proteoglycans by highlighting their importance in corneal transparency as well as their implication in corneal visual disorders.
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Affiliation(s)
| | - Francois Malecaze
- EA4555, Université Toulouse III Paul Sabatier, Toulouse, France
- CHU Toulouse, Hôpital Purpan, Service d'Ophtalmologie, Toulouse, France
| | - Stephane D Galiacy
- EA4555, Université Toulouse III Paul Sabatier, Toulouse, France.
- CHU Toulouse, Hôpital Purpan, Service d'Ophtalmologie, Toulouse, France.
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11
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Regulation of corneal stroma extracellular matrix assembly. Exp Eye Res 2015; 133:69-80. [PMID: 25819456 DOI: 10.1016/j.exer.2014.08.001] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/30/2014] [Accepted: 08/02/2014] [Indexed: 01/16/2023]
Abstract
The transparent cornea is the major refractive element of the eye. A finely controlled assembly of the stromal extracellular matrix is critical to corneal function, as well as in establishing the appropriate mechanical stability required to maintain corneal shape and curvature. In the stroma, homogeneous, small diameter collagen fibrils, regularly packed with a highly ordered hierarchical organization, are essential for function. This review focuses on corneal stroma assembly and the regulation of collagen fibrillogenesis. Corneal collagen fibrillogenesis involves multiple molecules interacting in sequential steps, as well as interactions between keratocytes and stroma matrix components. The stroma has the highest collagen V:I ratio in the body. Collagen V regulates the nucleation of protofibril assembly, thus controlling the number of fibrils and assembly of smaller diameter fibrils in the stroma. The corneal stroma is also enriched in small leucine-rich proteoglycans (SLRPs) that cooperate in a temporal and spatial manner to regulate linear and lateral collagen fibril growth. In addition, the fibril-associated collagens (FACITs) such as collagen XII and collagen XIV have roles in the regulation of fibril packing and inter-lamellar interactions. A communicating keratocyte network contributes to the overall and long-range regulation of stromal extracellular matrix assembly, by creating micro-domains where the sequential steps in stromal matrix assembly are controlled. Keratocytes control the synthesis of extracellular matrix components, which interact with the keratocytes dynamically to coordinate the regulatory steps into a cohesive process. Mutations or deficiencies in stromal regulatory molecules result in altered interactions and deficiencies in both transparency and refraction, leading to corneal stroma pathobiology such as stromal dystrophies, cornea plana and keratoconus.
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12
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Targeted deletion of collagen V in tendons and ligaments results in a classic Ehlers-Danlos syndrome joint phenotype. THE AMERICAN JOURNAL OF PATHOLOGY 2015; 185:1436-47. [PMID: 25797646 DOI: 10.1016/j.ajpath.2015.01.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/11/2014] [Accepted: 01/02/2015] [Indexed: 01/10/2023]
Abstract
Collagen V mutations underlie classic Ehlers-Danlos syndrome, and joint hypermobility is an important clinical manifestation. We define the function of collagen V in tendons and ligaments, as well as the role of alterations in collagen V expression in the pathobiology in classic Ehlers-Danlos syndrome. A conditional Col5a1(flox/flox) mouse model was bred with Scleraxis-Cre mice to create a targeted tendon and ligament Col5a1-null mouse model, Col5a1(Δten/Δten). Targeting was specific, resulting in collagen V-null tendons and ligaments. Col5a1(Δten/Δten) mice demonstrated decreased body size, grip weakness, abnormal gait, joint laxity, and early-onset osteoarthritis. These gross changes were associated with abnormal fiber organization, as well as altered collagen fibril structure with increased fibril diameters and decreased fibril number that was more severe in a major joint stabilizing ligament, the anterior cruciate ligament (ACL), than in the flexor digitorum longus tendon. The ACL also had a higher collagen V content than did the flexor digitorum longus tendon. The collagen V-null ACL and flexor digitorum longus tendon both had significant alterations in mechanical properties, with ACL exhibiting more severe changes. The data demonstrate critical differential regulatory roles for collagen V in tendon and ligament structure and function and suggest that collagen V regulatory dysfunction is associated with an abnormal joint phenotype, similar to the hypermobility phenotype in classic Ehlers-Danlos syndrome.
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13
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Frolova EG, Drazba J, Krukovets I, Kostenko V, Blech L, Harry C, Vasanji A, Drumm C, Sul P, Jenniskens GJ, Plow EF, Stenina-Adognravi O. Control of organization and function of muscle and tendon by thrombospondin-4. Matrix Biol 2014; 37:35-48. [PMID: 24589453 DOI: 10.1016/j.matbio.2014.02.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 02/01/2014] [Accepted: 02/01/2014] [Indexed: 01/28/2023]
Abstract
Thrombospondins (TSPs) are multifunctional proteins that are deposited in the extracellular matrix where they directly affect the function of vascular and other cell types. TSP-4, one of the 5 TSP family members, is expressed abundantly in tendon and muscle. We have examined the effect of TSP-4 deficiency on tendon collagen and skeletal muscle morphology and function. In Thbs4(-/-) mice, tendon collagen fibrils are significantly larger than in wild-type mice, and there is no compensatory over-expression of TSP-3 and TSP-5, the two TSPs most highly homologous to TSP-4, in the deficient mice. TSP-4 is expressed in skeletal muscle, and higher levels of TSP-4 protein are associated with the microvasculature of red skeletal muscle with high oxidative metabolism. Lack of TSP-4 in medial soleus, red skeletal muscle with predominant oxidative metabolism, is associated with decreased levels of several specific glycosaminoglycan modifications, decreased expression of a TGFβ receptor beta-glycan, decreased activity of lipoprotein lipase, which associates with vascular cell surfaces by binding to glycosaminoglycans, and decreased uptake of VLDL. The soleus muscle is smaller and hind- and fore-limb grip strength is reduced in Thbs4(-/-) mice compared to wild-type mice. These observations suggest that TSP-4 regulates the composition of the ECM at major sites of its deposition, tendon and muscle, and the absence of TSP-4 alters the organization, composition and physiological functions of these tissues.
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Affiliation(s)
- Ella G Frolova
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Judith Drazba
- Imaging Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Irene Krukovets
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Volodymyr Kostenko
- Department of Neurology, Neuromuscular Section, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Lauren Blech
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Christy Harry
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Amit Vasanji
- Biomedical Imaging and Analysis Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Carla Drumm
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Pavel Sul
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Guido J Jenniskens
- Department of Biochemistry 194, University Medical Center, NCMLS, Nijmegen, The Netherlands; ModiQuest Research BV, Nijmegen, The Netherlands
| | - Edward F Plow
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States
| | - Olga Stenina-Adognravi
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, United States.
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14
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Mienaltowski MJ, Birk DE. Structure, physiology, and biochemistry of collagens. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 802:5-29. [PMID: 24443018 DOI: 10.1007/978-94-007-7893-1_2] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tendons and ligaments are connective tissues that guide motion, share loads, and transmit forces in a manner that is unique to each as well as the anatomical site and biomechanical stresses to which they are subjected. Collagens are the major molecular components of both tendons and ligaments. The hierarchical structure of tendon and its functional properties are determined by the collagens present, as well as their supramolecular organization. There are 28 different types of collagen that assemble into a variety of supramolecular structures. The assembly of specific supramolecular structures is dependent on the interaction with other matrix molecules as well as the cellular elements. Multiple suprastructural assemblies are integrated to form the functional tendon/ligament. This chapter begins with a discussion of collagen molecules. This is followed by a definition of the supramolecular structures assembled by different collagen types. The general principles involved in the assembly of collagen-containing suprastructures are presented focusing on the regulation of tendon collagen fibrillogenesis. Finally, site-specific differences are discussed. While generalizations can be made, differences exist between different tendons as well as between tendons and ligaments. Compositional differences will impact structure that in turn will determine functional differences. Elucidation of the unique physiology and pathophysiology of different tendons and ligaments will require an appreciation of the role compositional differences have on collagen suprastructural assembly, tissue organization, and function.
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Affiliation(s)
- Michael J Mienaltowski
- Departments of Molecular Pharmacology & Physiology and Orthopaedics & Sports Medicine, University of South Florida, Morsani College of Medicine, 12901 Bruce B. Downs Blvd., MDC8, Tampa, FL, 33612, USA
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15
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White JF, Werkmeister JA, Bisucci T, Darby IA, Ramshaw JAM. Temporal variation in the deposition of different types of collagen within a porous biomaterial implant. J Biomed Mater Res A 2013; 102:3550-5. [DOI: 10.1002/jbm.a.35027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/31/2013] [Indexed: 01/24/2023]
Affiliation(s)
- Jacinta F. White
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
| | - Jerome A. Werkmeister
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
| | - Teresa Bisucci
- School of Medical Sciences; RMIT University; Bundoora Victoria 3083 Australia
| | - Ian A. Darby
- School of Medical Sciences; RMIT University; Bundoora Victoria 3083 Australia
| | - John A. M. Ramshaw
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
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16
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Bollinger KE, Crabb JS, Yuan X, Putliwala T, Clark AF, Crabb JW. Proteomic similarities in steroid responsiveness in normal and glaucomatous trabecular meshwork cells. Mol Vis 2012; 18:2001-11. [PMID: 22876128 PMCID: PMC3413418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 07/17/2012] [Indexed: 12/03/2022] Open
Abstract
PURPOSE Glucocorticoids (GCs) are common anti-inflammatory agents that can cause ocular hypertension and secondary glaucoma as a consequence of impaired aqueous humor outflow through the trabecular meshwork (TM). Mechanisms of GC-signaling are complex and poorly understood. To better understand GC-signaling in the eye, we tested the hypothesis that common mechanisms of steroid responsiveness exist in TM cells from normal and glaucomatous donors. METHODS Four primary cultures of human TM cells from normal and glaucomatous donors were treated with or without dexamethasone (Dex) for 10 days, then cellular proteins were extracted, identified and quantified by liquid chromatography tandem mass spectrometry (LC MS/MS) iTRAQ (isobaric tags for relative and absolute quantitation) technology. RESULTS A total of 718 proteins were quantified. Dex-treatment significantly altered the abundance of 40 proteins in ≥3 cell samples, 37 of which have not previously been associated with GC-signaling in TM cells. Most steroid responsive proteins were changed in all four TM cells analyzed, both normal and glaucomatous. GC-induced proteomic changes support remodeling of the extracellular matrix, disorganization of the cytoskeleton/cell-cell interactions, and mitochondrial dysfunction. Such physiologic consequences appear common to those induced in TM cells by transforming growth factor-β(2), another putative contributor to ocular hypertension and glaucoma pathology. CONCLUSIONS The results expand the repertoire of TM proteins involved in GC-signaling, demonstrate common consequences of GC-signaling in normal and glaucomatous TM cells, and reveal similarities in proteomic changes induced by steroids and TGFβ(2) in normal and glaucomatous TM cells. Finally, the data contributes to a TM quantitative proteomic database.
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Affiliation(s)
| | - John S. Crabb
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH,Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Xianglin Yuan
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH,Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Tasneem Putliwala
- Department of Cell Biology and Anatomy, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX
| | - Abbot F. Clark
- Department of Cell Biology and Anatomy, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX
| | - John W. Crabb
- Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, OH,Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH,Departments of Ophthalmology and Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
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17
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Fang M, Jacob R, McDougal O, Oxford JT. Minor fibrillar collagens, variable regions alternative splicing, intrinsic disorder, and tyrosine sulfation. Protein Cell 2012; 3:419-33. [PMID: 22752873 DOI: 10.1007/s13238-012-2917-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Accepted: 02/07/2012] [Indexed: 12/25/2022] Open
Abstract
Minor fibrillar collagen types V and XI, are those less abundant than the fibrillar collagen types I, II and III. The alpha chains share a high degree of similarity with respect to protein sequence in all domains except the variable region. Genomic variation and, in some cases, extensive alternative splicing contribute to the unique sequence characteristics of the variable region. While unique expression patterns in tissues exist, the functions and biological relevance of the variable regions have not been elucidated. In this review, we summarize the existing knowledge about expression patterns and biological functions of the collagen types V and XI alpha chains. Analysis of biochemical similarities among the peptides encoded by each exon of the variable region suggests the potential for a shared function. The alternative splicing, conservation of biochemical characteristics in light of low sequence conservation, and evidence for intrinsic disorder, suggest modulation of binding events between the surface of collagen fibrils and surrounding extracellular molecules as a shared function.
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Affiliation(s)
- Ming Fang
- Department of Biological Sciences, Boise State University, Boise, ID 83725, USA
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18
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Singh B, Fleury C, Jalalvand F, Riesbeck K. Human pathogens utilize host extracellular matrix proteins laminin and collagen for adhesion and invasion of the host. FEMS Microbiol Rev 2012; 36:1122-80. [PMID: 22537156 DOI: 10.1111/j.1574-6976.2012.00340.x] [Citation(s) in RCA: 206] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 02/08/2012] [Accepted: 03/29/2012] [Indexed: 01/11/2023] Open
Abstract
Laminin (Ln) and collagen are multifunctional glycoproteins that play an important role in cellular morphogenesis, cell signalling, tissue repair and cell migration. These proteins are ubiquitously present in tissues as a part of the basement membrane (BM), constitute a protective layer around blood capillaries and are included in the extracellular matrix (ECM). As a component of BMs, both Lns and collagen(s), thus function as major mechanical containment molecules that protect tissues from pathogens. Invasive pathogens breach the basal lamina and degrade ECM proteins of interstitial spaces and connective tissues using various ECM-degrading proteases or surface-bound plasminogen and matrix metalloproteinases recruited from the host. Most pathogens associated with the respiratory, gastrointestinal, or urogenital tracts, as well as with the central nervous system or the skin, have the capacity to bind and degrade Lns and collagen(s) in order to adhere to and invade host tissues. In this review, we focus on the adaptability of various pathogens to utilize these ECM proteins as enhancers for adhesion to host tissues or as a targets for degradation in order to breach the cellular barriers. The major pathogens discussed are Streptococcus, Staphylococcus, Pseudomonas, Salmonella, Yersinia, Treponema, Mycobacterium, Clostridium, Listeria, Porphyromonas and Haemophilus; Candida, Aspergillus, Pneumocystis, Cryptococcus and Coccidioides; Acanthamoeba, Trypanosoma and Trichomonas; retrovirus and papilloma virus.
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Affiliation(s)
- Birendra Singh
- Medical Microbiology, Department of Laboratory Medicine Malmö, Skåne University Hospital, Lund University, Malmö, Sweden
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19
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Yang Y, Jin Y, Liu P, Shi Y, Cao Y, Liu J, Shi Y, Li H, Lin J. RNAi silencing of type V collagen in Schistosoma japonicum affects parasite morphology, spawning, and hatching. Parasitol Res 2012; 111:1251-7. [PMID: 22638918 DOI: 10.1007/s00436-012-2959-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Accepted: 05/03/2012] [Indexed: 11/27/2022]
Abstract
Type V collagen is a component of non-cartilaginous tissues and is important in the determination of fibril structure and matrix organization, although its functions are still poorly understood. In this report, RNA interference (RNAi) approaches were used to investigate the effects of knockdown of the schistosome type V collagen (SjColV) gene. In this study, three different short interfering (si) RNAs targeting different regions of the gene were designed to suppress the expression of SjColV in Schistosoma japonicum using a soaking method. By establishing controls for measuring off-target RNAi effects, we found that different siRNA sequences had different levels of effectiveness. Although all the siRNAs tested reduced SjColV transcript levels, the S1 siRNA consistently reduced SjColV expression to >99 % of the control. In the following experiments, S1 siRNA was adapted to inhibit SjColV expression, and the silencing effects were detected by real-time PCR and Western blot. The spawning and egg hatching of parasites were calculated, while the worms' morphology was taken by scanning electron microscopy. The results show that silencing the expression of SjColV significantly affects the spawning and egg hatching of S. japonicum, and it also affects the worms' morphology.
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Affiliation(s)
- Yunxia Yang
- Key Laboratory of Animal Parasitology, Ministry of Agriculture of China, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai, 200241, People's Republic of China
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20
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Antipova O, Orgel JPRO. Non-enzymatic decomposition of collagen fibers by a biglycan antibody and a plausible mechanism for rheumatoid arthritis. PLoS One 2012; 7:e32241. [PMID: 22427827 PMCID: PMC3302792 DOI: 10.1371/journal.pone.0032241] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 01/25/2012] [Indexed: 12/20/2022] Open
Abstract
Rheumatoid arthritis (RA) is a systemic autoimmune inflammatory and destructive joint disorder that affects tens of millions of people worldwide. Normal healthy joints maintain a balance between the synthesis of extracellular matrix (ECM) molecules and the proteolytic degradation of damaged ones. In the case of RA, this balance is shifted toward matrix destruction due to increased production of cleavage enzymes and the presence of (autoimmune) immunoglobulins resulting from an inflammation induced immune response. Herein we demonstrate that a polyclonal antibody against the proteoglycan biglycan (BG) causes tissue destruction that may be analogous to that of RA affected tissues. The effect of the antibody is more potent than harsh chemical and/or enzymatic treatments designed to mimic arthritis-like fibril de-polymerization. In RA cases, the immune response to inflammation causes synovial fibroblasts, monocytes and macrophages to produce cytokines and secrete matrix remodeling enzymes, whereas B cells are stimulated to produce immunoglobulins. The specific antigen that causes the RA immune response has not yet been identified, although possible candidates have been proposed, including collagen types I and II, and proteoglycans (PG's) such as biglycan. We speculate that the initiation of RA associated tissue destruction in vivo may involve a similar non-enzymatic decomposition of collagen fibrils via the immunoglobulins themselves that we observe here ex vivo.
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Affiliation(s)
- Olga Antipova
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois, United States of America
- * E-mail: (OA); (JO)
| | - Joseph P. R. O. Orgel
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois, United States of America
- * E-mail: (OA); (JO)
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21
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Sun M, Chen S, Adams SM, Florer JB, Liu H, Kao WWY, Wenstrup RJ, Birk DE. Collagen V is a dominant regulator of collagen fibrillogenesis: dysfunctional regulation of structure and function in a corneal-stroma-specific Col5a1-null mouse model. J Cell Sci 2011; 124:4096-105. [PMID: 22159420 DOI: 10.1242/jcs.091363] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Collagen V is a regulatory fibril-forming collagen that forms heterotypic fibrils with collagen I. Deletion of collagen V in the mouse is associated with a lack of fibril assembly in the embryonic mesenchyme, with a resultant lethal phenotype. The current work elucidates the regulatory roles of collagen V during development and growth of tissues. A conditional mouse model with a mutation in Col5a1 was developed using a Cre-loxP approach. Col5a1 was ablated in Col5a1(flox/flox) mice using a cornea stroma-specific Kera-Cre driver mouse to produce a bitransgenic Col5a1(Δst/Δst) line that is null for collagen V. This permits analyses of the corneal stroma, a widely used model for studies of collagen V. The collagen-V-knockout stroma demonstrated severe dysfunctional regulation of fibrillogenesis. Fibril diameters were significantly increased, with an abnormal, heterogeneous distribution; fibril structure was abnormal, fibril number was decreased and lamellae were disorganized with decreased stroma thickness. The phenotype was more severe in the anterior versus posterior stroma. Opacity was demonstrated throughout the Col5a1(Δst/Δst) stroma, with significantly increased haze intensity compared with control mice. These data indicate central regulatory roles for collagen V in fibril and matrix assembly during tissue development, with dysfunctional regulation resulting in a functional loss of transparency.
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Affiliation(s)
- Mei Sun
- Department of Pathology and Cell Biology, University of South Florida College of Medicine, 12901 Bruce B. Downs Blvd, Tampa, FL 33612, USA
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22
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Franco B, Vincenzo V, Alessandro DV, Tonello C, Abatangelo G, Mazzoleni F. Tissue engineering approaches for the construction of a completely autologous tendon substitute. Indian J Plast Surg 2011; 41:38-46. [PMID: 19753199 PMCID: PMC2739538 DOI: 10.4103/0970-0358.41109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Tissue engineering is a multidisciplinary field that involves the application of the principles and methods of engineering and life sciences towards i) the fundamental understanding of structure-function relationships in normal and pathological mammalian tissues and ii) the development of biological substitutes that restore, maintain or improve tissue function. The goal of tissue engineering is to surpass the limitations of conventional treatments based on organ transplantation and biomaterial implantation. The field of tendon tissue engineering is relatively unexplored due to the difficulty in in vitro preservation of tenocyte phenotype. Only recently has mechanobiology allowed us to gain a better understanding of the fundamental role of in vitro mechanical stimuli in maintaining the phenotype of tendinous tissue. This review analyzes the techniques used so far for in vitro regeneration of tendinous tissue.
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23
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Lu P, Zhang GR, Song XH, Zou XH, Wang LL, Ouyang HW. Col V siRNA engineered tenocytes for tendon tissue engineering. PLoS One 2011; 6:e21154. [PMID: 21713001 PMCID: PMC3119690 DOI: 10.1371/journal.pone.0021154] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Accepted: 05/20/2011] [Indexed: 11/18/2022] Open
Abstract
The presence of uniformly small collagen fibrils in tendon repair is believed to play a major role in suboptimal tendon healing. Collagen V is significantly elevated in healing tendons and plays an important role in fibrillogenesis. The objective of this study was to investigate the effect of a particular chain of collagen V on the fibrillogenesis of Sprague-Dawley rat tenocytes, as well as the efficacy of Col V siRNA engineered tenocytes for tendon tissue engineering. RNA interference gene therapy and a scaffold free tissue engineered tendon model were employed. The results showed that scaffold free tissue engineered tendon had tissue-specific tendon structure. Down regulation of collagen V α1 or α2 chains by siRNAs (Col5α1 siRNA, Col5α2 siRNA) had different effects on collagen I and decorin gene expressions. Col5α1 siRNA treated tenocytes had smaller collagen fibrils with abnormal morphology; while those Col5α2 siRNA treated tenocytes had the same morphology as normal tenocytes. Furthermore, it was found that tendons formed by coculture of Col5α1 siRNA treated tenocytes with normal tenocytes at a proper ratio had larger collagen fibrils and relative normal contour. Conclusively, it was demonstrated that Col V siRNA engineered tenocytes improved tendon tissue regeneration. And an optimal level of collagen V is vital in regulating collagen fibrillogenesis. This may provide a basis for future development of novel cellular- and molecular biology-based therapeutics for tendon diseases.
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Affiliation(s)
- Ping Lu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
- Institute of Cell Biology, School of Medicine, Zhejiang University, Hangzhou, China
| | - Guo Rong Zhang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xing Hui Song
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
- Institute of Cell Biology, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiao Hui Zou
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
- Women Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Lin Lin Wang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
- Institute of Cell Biology, School of Medicine, Zhejiang University, Hangzhou, China
- * E-mail: (LLW); (HWO)
| | - Hong Wei Ouyang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, China
- Institute of Cell Biology, School of Medicine, Zhejiang University, Hangzhou, China
- * E-mail: (LLW); (HWO)
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24
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Gil ES, Park SH, Marchant J, Omenetto F, Kaplan DL. Response of human corneal fibroblasts on silk film surface patterns. Macromol Biosci 2010; 10:664-73. [PMID: 20301120 PMCID: PMC3134773 DOI: 10.1002/mabi.200900452] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Transparent, biodegradable, mechanically robust, and surface-patterned silk films were evaluated for the effect of surface morphology on human corneal fibroblast (hCF) cell proliferation, orientation, and ECM deposition and alignment. A series of dimensionally different surface groove patterns were prepared from optically graded glass substrates followed by casting poly(dimethylsiloxane) (PDMS) replica molds. The features on the patterned silk films showed an array of asymmetric triangles and displayed 37-342 nm depths and 445-3 582 nm widths. hCF DNA content on all patterned films were not significantly different from that on flat silk films after 4 d in culture. However, the depth and width of the grooves influenced cell alignment, while the depth differences affected cell orientation; overall, deeper and narrower grooves induced more hCF orientation. Over 14 d in culture, cell layers and actin filament organization demonstrated that confluent hCFs and their cytoskeletal filaments were oriented along the direction of the silk film patterned groove axis. Collagen type V and proteoglycans (decorin and biglycan), important markers of corneal stromal tissue, were highly expressed with alignment. Understanding corneal stromal fibroblast responses to surface features on a protein-based biomaterial applicable in vivo for corneal repair potential suggests options to improve corneal tissue mimics. Further, the approaches provide fundamental biomaterial designs useful for bioengineering oriented tissue layers, an endemic feature in most biological tissue structures that lead to critical tissue functions.
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Affiliation(s)
- Eun Seok Gil
- Department of Biomedical Engineering, Sackler School of Biomedical Science, Tufts University, 4 Colby St., Medford, Massachusetts 02155, USA
| | - Sang Huyg Park
- Department of Biomedical Engineering, Sackler School of Biomedical Science, Tufts University, 4 Colby St., Medford, Massachusetts 02155, USA
| | - Jeff Marchant
- Department of Biomedical Engineering, Sackler School of Biomedical Science, Tufts University, 4 Colby St., Medford, Massachusetts 02155, USA
| | - Fiorenzo Omenetto
- Department of Biomedical Engineering, Sackler School of Biomedical Science, Tufts University, 4 Colby St., Medford, Massachusetts 02155, USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Sackler School of Biomedical Science, Tufts University, 4 Colby St., Medford, Massachusetts 02155, USA
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Hardmeier R, Redl H, Marlovits S. Effects of mechanical loading on collagen propeptides processing in cartilage repair. J Tissue Eng Regen Med 2010; 4:1-11. [PMID: 19842116 DOI: 10.1002/term.211] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Injured articular cartilage has poor reparative capabilities and if left untreated may develop into osteoarthritis. Unsatisfactory results with conventional treatment methods have brought as an alternative treatment the development of matrix autologous chondrocyte transplants (MACTs). Recent evidence proposes that the maintenance of the original phenotype by isolated chondrocytes grown in a scaffold transplant is linked to mechanical compression, because macromolecules, particularly collagen, of the extracellular matrix have the ability to 'self-assemble'. In load-bearing tissues, collagen is abundantly present and mechanical properties depend on the collagen fibre architecture. Study of the active changes in collagen architecture is the focus of diverse fields of research, including developmental biology, biomechanics and tissue engineering. In this review, the structural model of collagen assembly is presented in order to understand how scaffold geometry plays a critical role in collagen propeptide processing and chondrocyte development. When physical forces are applied to different cell-based scaffolds, the resulting specific twist of the scaffolds might be accompanied by changes in the fibril pattern synthesis of the new collagen. The alteration in the scaffolds due to mechanical stress is associated with cellular signalling communication and the preservation of N-terminus procollagen moieties, which would regulate both the collagen synthesis and the diameter of the fibre. The structural difference would also affect actin stabilization, cytoskeleton remodelling and proteoglycan assembly. These effects seemed to be dependent on the magnitude and duration of the physical stress. This review will contribute to the understanding of mechanisms for collagen assembly in both a natural and an artificial environment.
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Bueno EM, Saeidi N, Melotti S, Ruberti JW. Effect of serum and insulin modulation on the organization and morphology of matrix synthesized by bovine corneal stromal cells. Tissue Eng Part A 2010; 15:3559-73. [PMID: 19480568 DOI: 10.1089/ten.tea.2008.0404] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The in vitro production of highly organized collagen fibrils by corneal keratocytes in a three-dimensional scaffold-free culture system presents a unique opportunity for the direct observation of organized matrix formation. The objective of this investigation was to develop such a culture system in a glass substrate (for optical accessibility) and to directly examine the effect of reducing serum and/or increasing insulin on the stratification and secretion of aligned matrix by fourth- to fifth-passage bovine corneal stromal keratocytes. Medium concentrations of 0%, 1%, or 10% fetal bovine serum and 0% or 1% insulin-transferrin-selenium were investigated. High-resolution differential interference contrast microscopy, quick-freeze/deep-etch, and conventional transmission electron microscopy were used to monitor the evolution, morphology, and ultrastructure of the cell-matrix constructs. In a medium containing 1% each of serum and insulin-transferrin-selenium, stromal cells stratified and secreted abundant and locally aligned matrix, generating the thickest cell-matrix constructs (allowing handling with forceps). The results of this study have the potential to significantly advance the field of developmental functional engineering of load-bearing tissues by (i) elucidating cues that modulate in vitro cell secretion of organized matrix and (ii) establishing an optically accessible cell culture system for investigating the mechanism of cell secretion of aligned collagen fibrils.
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Affiliation(s)
- Ericka M Bueno
- Skeletal Biology Laboratory, Department of Orthopedics, Brigham and Women's Hospital, Boston, Massachusetts, USA
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27
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Collagen-bound LDL modifies endothelial cell adhesion to type V collagen: Implications for atherosclerosis. Open Life Sci 2009. [DOI: 10.2478/s11535-009-0047-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractLow density lipoprotein (LDL) is retained in the extracellular matrix of the arterial wall where it is considered to be atherogenic, but little is known about how cell adhesion to the matrix is affected by collagen-bound LDL. We tested the effect of native, oxidized and acetylated LDL reacted with adsorbed monomeric type I, III and V collagen on endothelial cell adhesion to collagen using a colorimetric adhesion assay. We found that none of the LDL species affected adhesion to type I and III collagen, but that collagen-bound native and acetylated LDL enhanced attachment to type V collagen, whereas bound oxidized LDL inhibited adhesion to this collagen. We therefore suggest that oxidized LDL associated with type V collagen in the arterial wall would favor de-endothelialization and contribute to atherogenesis and thrombosis.
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Woo SLY, Liang R, Fisher MB. Future of Orthopaedic Sports Medicine and Soft Tissue Healing: The Important Role of Engineering. Cell Mol Bioeng 2009. [DOI: 10.1007/s12195-009-0065-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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30
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Corneal Anatomy, Physiology, and Wound Healing. Ophthalmology 2009. [DOI: 10.1016/b978-0-323-04332-8.00025-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] Open
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31
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Lawrence BD, Marchant JK, Pindrus MA, Omenetto FG, Kaplan DL. Silk film biomaterials for cornea tissue engineering. Biomaterials 2008; 30:1299-308. [PMID: 19059642 DOI: 10.1016/j.biomaterials.2008.11.018] [Citation(s) in RCA: 266] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 11/18/2008] [Indexed: 10/21/2022]
Abstract
Biomaterials for corneal tissue engineering must demonstrate several critical features for potential utility in vivo, including transparency, mechanical integrity, biocompatibility and slow biodegradation. Silk film biomaterials were designed and characterized to meet these functional requirements. Silk protein films were used in a biomimetic approach to replicate corneal stromal tissue architecture. The films were 2 microm thick to emulate corneal collagen lamellae dimensions, and were surface patterned to guide cell alignment. To enhance trans-lamellar diffusion of nutrients and to promote cell-cell interaction, pores with 0.5-5.0 microm diameters were introduced into the silk films. Human and rabbit corneal fibroblast proliferation, alignment and corneal extracellular matrix expression on these films in both 2D and 3D cultures were demonstrated. The mechanical properties, optical clarity and surface patterned features of these films, combined with their ability to support corneal cell functions suggest that this new biomaterial system offers important potential benefits for corneal tissue regeneration.
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Affiliation(s)
- Brian D Lawrence
- Department of Biomedical Engineering, Tufts University, 4 Colby St., Medford, MA 02155, USA
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32
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Satomi É, Teodoro WR, Parra ER, Fernandes TD, Velosa APP, Capelozzi VL, Yoshinari NH. Changes in histoanatomical distribution of types I, III and V collagen promote adaptative remodeling in posterior tibial tendon rupture. Clinics (Sao Paulo) 2008; 63:9-14. [PMID: 18297201 PMCID: PMC2664193 DOI: 10.1590/s1807-59322008000100003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Accepted: 09/18/2007] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Posterior tibial tendon dysfunction is a common cause of adult flat foot deformity, and its etiology is unknown. PURPOSE In this study, we characterized the morphologic pattern and distribution of types I, III and V collagen in posterior tibial tendon dysfunction. METHOD Tendon samples from patients with and without posterior tibial tendon dysfunction were stained by immunofluorescence using antibodies against types I, III and V collagen. RESULTS Control samples showed that type V deposited near the vessels only, while surgically obtained specimens displayed type V collagen surrounding other types of collagen fibers in thicker adventitial layers. Type III collagen levels were also increased in pathological specimens. On the other hand, amounts of collagen type I, which represents 95% of the total collagen amount in normal tendon, were decreased in pathological specimens. CONCLUSION Fibrillogenesis in posterior tibial tendon dysfunction is altered due to higher expression of types III and V collagen and a decreased amount of collagen type I, which renders the originating fibrils structurally less resistant to mechanical forces.
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Affiliation(s)
- Érika Satomi
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Walcy R. Teodoro
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Edwin R. Parra
- Department of Pathology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil.
| | - Túlio D. Fernandes
- Department of Orthopedics, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Ana Paula P. Velosa
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil.
| | - Natalino Hajime Yoshinari
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
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Mostafaie A, Bidmeshkipour A, Shirvani Z, Mansouri K, Chalabi M. Kiwifruit Actinidin: A Proper New Collagenase for Isolation of Cells from Different Tissues. Appl Biochem Biotechnol 2008; 144:123-31. [PMID: 18456944 DOI: 10.1007/s12010-007-8106-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Ali Mostafaie
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Sorkheh Ligeh, P.O. Box 1568, Kermanshah, Iran.
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Picciani R, Desai K, Guduric-Fuchs J, Cogliati T, Morton CC, Bhattacharya SK. Cochlin in the eye: functional implications. Prog Retin Eye Res 2007; 26:453-69. [PMID: 17662637 PMCID: PMC2064858 DOI: 10.1016/j.preteyeres.2007.06.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aqueous humor is actively produced in the ciliary epithelium of the anterior chamber and has important functions for the eye. Under normal physiological conditions, the inflow and outflow of the aqueous humor are tightly regulated, but in the pathologic state this balance is lost. Aqueous outflow involves structures of the anterior chamber and experiences most resistance at the level of the trabecular meshwork (TM) that acts as a filter. The modulation of the TM structure regulates the filter and its mechanism remains poorly understood. Proteomic analyses have identified cochlin, a protein of poorly understood function, in the glaucomatous TM but not in healthy control TM from human cadaver eyes. The presence of cochlin has subsequently been confirmed by Western and immunohistochemical analyses. Functionally, cochlin undergoes multimerization induced by shear stress and other changes in the microenvironment. Cochlin along with mucopolysaccharide deposits has been found in the TM of glaucoma patients and in the inner ear of subjects affected by the hearing disorder DNFA9, a late-onset, progressive disease that also involves alterations in fluid shear regimes. In vitro, cochlin induces aggregation of primary TM cells suggesting a role in cell adhesion, possibly in mechanosensation, and in modulation of the TM filter.
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Affiliation(s)
- Renata Picciani
- Bascom Palmer Eye Institute, University of Miami, Miami, Florida, 33136
| | - Kavita Desai
- Bascom Palmer Eye Institute, University of Miami, Miami, Florida, 33136
| | - Jasenka Guduric-Fuchs
- Centre for Vision Sciences, Queen's University School of Biomedical Sciences, BELFAST BT12 6BA, UK
| | - Tiziana Cogliati
- Centre for Vision Sciences, Queen's University School of Biomedical Sciences, BELFAST BT12 6BA, UK
| | - Cynthia C. Morton
- Harvard Medical School, Brigham and Women's Hospital New Research Building, Room 160D, 77 Avenue Louis Pasteur, Boston, MA 02115
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35
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Doughty MJ, Bergmanson JPG. Assessment of the apparent intra- and inter-sample variability in the collagen fibril diameter in the posterior corneal stroma of rabbits. A transmission electron microscopy study. Ophthalmic Res 2006; 38:335-42. [PMID: 17047410 DOI: 10.1159/000096228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2005] [Accepted: 07/27/2006] [Indexed: 11/19/2022]
Abstract
PURPOSE To assess the natural variability in the diameter of small collagen fibrils in the lamellae of corneal stroma of healthy young rabbits. MATERIALS AND METHODS The corneas of 6 young adult female New Zealand White rabbits (2.1 kg) were prepared for transmission electron microscopy (TEM) by fixation with a cacodylate-buffered 2% glutaraldehyde (pH 7.2-7.4, 320-340 mosm/kg). The corneas were embedded in Epon-Araldite, thin sections prepared from the central region of the posterior corneal stroma and stained with acidic uranyl acetate followed by acidic lead citrate. High magnification (x 33,000) micrographs were taken, and fibril diameters (FDs) measured at a final magnification of x 275,000 to a resolution of 2 nm. RESULTS Assessment of sampling-related errors indicated that the average diameter of the fibrils within any particular micrograph could be estimated to within 1% or better by measures of 100 fibrils. Assessments of the intra-sample variance (6 micrographs taken from the same cornea) indicated a group mean FD of 32.4 +/- 3.6 nm, whilst the inter-sample variance (6 micrographs taken from 6 different corneas) yielded an average of 33.1 +/- 4.5 nm (n = 100 fibrils/micrograph, +/-SD). However, group-averaged data sets of FDs, while unimodal, were not normally distributed, and cumulative averaging indicated a fixed range of FDs across the data sets. CONCLUSIONS Intra- and inter-sample variability in collagen FDs is very similar, but the analysis indicates that the collagen fibrils are not homogeneous and that closely adjacent lamellae can have subtle differences in average FD.
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Affiliation(s)
- Michael J Doughty
- Texas Eye Research and Technology Center, University of Houston College of Optometry, University of Houston, Houston, TX 77204-2020, USA
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36
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Christner PJ, Gentiletti J, Peters J, Ball ST, Yamauchi M, Atsawasuwan P, Beason DP, Soslowsky LJ, Birk DE. Collagen dysregulation in the dermis of the Sagg/+ mouse: a loose skin model. J Invest Dermatol 2006; 126:595-602. [PMID: 16424879 DOI: 10.1038/sj.jid.5700100] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Sagg/+ mouse is an ethylnitrosourea-derived mutant with a dermal phenotype similar to some of the subtypes of Ehlers-Danlos syndrome (EDS) and cutis laxa. The dermis of the Sagg/+ mouse has less dense and more disorganized collagen fibers compared to controls. The size of extracted Type I dermal collagen was the same as that observed in normal skin; however, more collagen could be extracted from Sagg/+ skin, which also showed decreased collagen content and decreased steady-state levels of alpha1(I), alpha2(I), alpha1(V), and alpha2(V) procollagen mRNAs. The biomechanical properties of Sagg/+ skin were significantly decreased relative to normal skin. However, there were no significant differences in the quantities of the major collagen cross-links, that is, dehydrohydroxylysinonorleucine and dehydrohistidinohydroxymerodesmosine between Sagg/+ and normal skin. Electron microscopic evaluation of Sagg/+ skin indicated that the mutation interferes with the proper formation of collagen fibrils and the data are consistent with a mutation in Type V collagen leading to haploinsufficiency with the formation of two sub-populations of collagen fibrils, one normal and one with irregular shape and a larger diameter. Further study of this novel mutation will allow the identification of new mechanisms involved in the regulation of normal and pathologic collagen gene expression.
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Affiliation(s)
- Paul J Christner
- Department of Medicine, The Division of Rheumatology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107-5541, USA.
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Wenstrup RJ, Florer JB, Davidson JM, Phillips CL, Pfeiffer BJ, Menezes DW, Chervoneva I, Birk DE. Murine model of the Ehlers-Danlos syndrome. col5a1 haploinsufficiency disrupts collagen fibril assembly at multiple stages. J Biol Chem 2006; 281:12888-95. [PMID: 16492673 DOI: 10.1074/jbc.m511528200] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The most commonly identified mutations causing Ehlers-Danlos syndrome (EDS) classic type result in haploinsufficiency of proalpha1(V) chains of type V collagen, a quantitatively minor collagen that co-assembles with type I collagen as heterotypic fibrils. To determine the role(s) of type I/V collagen interactions in fibrillogenesis and elucidate the mechanism whereby half-reduction of type V collagen causes abnormal connective tissue biogenesis observed in EDS, we analyzed mice heterozygous for a targeted inactivating mutation in col5a1 that caused 50% reduction in col5a1 mRNA and collagen V. Comparable with EDS patients, they had decreased aortic stiffness and tensile strength and hyperextensible skin with decreased tensile strength of both normal and wounded skin. In dermis, 50% fewer fibrils were assembled with two subpopulations: relatively normal fibrils with periodic immunoreactivity for collagen V where type I/V interactions regulate nucleation of fibril assembly and abnormal fibrils, lacking collagen V, generated by unregulated sequestration of type I collagen. The presence of the aberrant fibril subpopulation disrupts the normal linear and lateral growth mediated by fibril fusion. Therefore, abnormal fibril nucleation and dysfunctional fibril growth with potential disruption of cell-directed fibril organization leads to the connective tissue dysfunction associated with EDS.
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Affiliation(s)
- Richard J Wenstrup
- Division of Human Genetics, Cincinnati Children's Hospital Research Foundation, Cincinnati, Ohio 45229, USA.
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Fini ME, Stramer BM. How the cornea heals: cornea-specific repair mechanisms affecting surgical outcomes. Cornea 2006; 24:S2-S11. [PMID: 16227819 DOI: 10.1097/01.ico.0000178743.06340.2c] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In mammals, penetrating injuries typically heal by deposition of fibrotic "repair tissue" that fills and seals wounds but does not restore normal function. Excessive deposition of fibrotic repair tissue can lead to pathologies involving excessive scarring and contracture. In the cornea, fibrotic repair presents special challenges affecting both clarity and shape of the cornea. With the increasing popularity of surgical techniques that alter corneal refractive errors, understanding of cornea repair mechanisms has acquired new significance. The cornea has unique anatomic, cellular, molecular, and functional features that lead to important mechanistic differences in the process of repair in comparison with what occurs in skin and other organs. Moreover, corneal function calls for special outcomes. This review addresses these features from the viewpoint of the authors' research on factors of importance to understanding and improving surgical outcomes.
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Affiliation(s)
- M Elizabeth Fini
- Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida 33136, USA.
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Bhattacharya SK, Peachey NS, Crabb JW. Cochlin and glaucoma: a mini-review. Vis Neurosci 2006; 22:605-13. [PMID: 16332271 PMCID: PMC1483214 DOI: 10.1017/s0952523805225099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2005] [Accepted: 07/12/2005] [Indexed: 11/07/2022]
Abstract
Primary open angle glaucoma (POAG) is a leading cause of late onset, progressive, irreversible blindness and, although its etiology is poorly understood, elevated intraocular pressure (IOP) often appears to be a contributory factor. Proteomic and Western analyses of trabecular meshwork (TM) from patients with POAG and age-matched controls originally implicated cochlin as possibly contributing to glaucoma pathogenesis. Cochlin deposits were subsequently detected in glaucomatous but not in control TM and older glaucomatous TM was found to contain higher levels of cochlin and significantly lower amounts of collagen type II. More recently, similar results were reported in DBA/2J mice, which at older ages develop elevated IOP, retinal ganglion cell degeneration, and optic nerve damage. Notably, cochlin was absent in TM from C57BL/6J, CD1, and BALBc/ByJ mice, which do not exhibit elevated IOP or glaucoma. Cochlin was found in the TM of very young DBA/2J mice, prior to elevated IOP, suggesting that over time the protein may contribute to the events leading to increased IOP and optic nerve damage. Here we review these findings and describe how future studies in DBA/2J mice can help resolve whether cochlin plays a causal role in mechanisms of POAG and elevated IOP.
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Pfeiffer BJ, Franklin CL, Hsieh FH, Bank RA, Phillips CL. Alpha 2(I) collagen deficient oim mice have altered biomechanical integrity, collagen content, and collagen crosslinking of their thoracic aorta. Matrix Biol 2005; 24:451-8. [PMID: 16095890 DOI: 10.1016/j.matbio.2005.07.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2004] [Revised: 07/06/2005] [Accepted: 07/06/2005] [Indexed: 10/25/2022]
Abstract
Collagen and elastin are the primary determinants of vascular integrity, with elastin hypothesized to be the major contributor to aortic compliance and type I collagen the major contributor to aortic strength and stiffness. Type I collagen is normally heterotrimeric composed of two alpha1(I) and one alpha2(I) collagen chains, alpha1(I)(2)alpha2(I). Recent investigations have reported that patients with recessively inherited forms of Ehlers Danlos syndrome that fail to synthesize proalpha2(I) chains have increased risks of cardiovascular complications. To assess the role of alpha2(I) collagen in aortic integrity, we used the osteogenesis imperfecta model (oim) mouse. Oim mice, homozygous for a COL1A2 mutation, synthesize only homotrimeric type I collagen, alpha1(I)3. We evaluated thoracic aortas from 3-month-old oim, heterozygote, and wildtype mice biomechanically for circumferential breaking strength (Fmax) and stiffness (IEM), histologically for morphological differences, and biochemically for collagen content and crosslinking. Circumferential biomechanics of oim and heterozygote descending thoracic aortas demonstrated the anticipated reduced Fmax and IEM relative to wildtype mice. Histological analyses of oim descending aortas demonstrated reduced collagen staining relative to wildtype aortas suggesting decreased collagen content, which hydroxyproline analyses of ascending and descending oim aortas confirmed. These findings suggest the reduced oim thoracic aortic integrity correlates with the absence of the alpha2(I)collagen chains and in part with reduced collagen content. However, oim ascending aortas also demonstrated a significant increase in pyridinoline crosslinks/collagen molecule as compared to wildtype ascending aortas. The role of increased collagen crosslinks is uncertain; increased crosslinking may represent a compensatory mechanism for the decreased integrity.
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Affiliation(s)
- Brent J Pfeiffer
- Department of Biochemistry, University of Missouri-Columbia, M743 Medical Science Building, 1 Hospital Dr, Columbia, MO 65212, USA
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Abstract
Tendon disorders can be debilitating for patients and are difficult to manage. Current management strategies offer symptomatic relief, but may not result in definitive disease resolution. Despite remodeling, the biochemical and mechanical properties of healed tendon tissue never match those of intact tendon. This article outlines the stages of tendon healing, and reviews the possible strategies for optimizing tendon healing and repair, such as cytokine therapy, gene therapy, and tissue engineering.
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Affiliation(s)
- Pankaj Sharma
- Department of Trauma and Orthopaedic Surgery, Highcroft, Romsey Road, Wessex Deanery, Winchester, SO22 5DH, UK
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42
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Holmes DF, Kadler KE. The precision of lateral size control in the assembly of corneal collagen fibrils. J Mol Biol 2005; 345:773-84. [PMID: 15588825 DOI: 10.1016/j.jmb.2004.10.078] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2004] [Revised: 10/24/2004] [Accepted: 10/27/2004] [Indexed: 11/22/2022]
Abstract
Collagen fibrils in the corneal stroma have been recognised to have a high degree of uniformity of diameter and spatial arrangement compared with those in other mature connective tissues. The precision of this lateral size control has been determined in this study by mass per unit length measurements on fibrils isolated from adult bovine corneal stroma. At the molecular level, however, there are substantial variations in lateral size, both between fibrils and along individual fibrils. The mean mass per unit length was measured to be 304 kDa nm(-1), equivalent to 347 collagen molecules in transverse section and had a standard deviation of 8.3%. The variation of lateral size along individual fibrils was measured as a mass slope over approximately 7 microm lengths (100 D-periods) and had a mean mass slope equivalent to 0.56 molecules per D-period. Smoothly tapered tips of length approximately 7 microm were also observed with a mass slope of about approximately three molecules per D-period. The frequency of these tips was used to estimate a mean fibril length of approximately 940 microm in the sample tissue. Observations of molecular polarity within the fibril shafts and tips were used to consider possible models of fibril assembly.
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Affiliation(s)
- David F Holmes
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Smith Building, Oxford Road, Manchester M13 9PT, UK
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43
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Abstract
Tendon disorders are frequent and are responsible for substantial morbidity both in sports and in the workplace. Tendinopathy, as opposed to tendinitis or tendinosis, is the best generic descriptive term for the clinical conditions in and around tendons arising from overuse. Tendinopathy is a difficult problem requiring lengthy management, and patients often respond poorly to treatment. Preexisting degeneration has been implicated as a risk factor for acute tendon rupture. Several physical modalities have been developed to treat tendinopathy. There is limited and mixed high-level evidence to support the, albeit common, clinical use of these modalities. Further research and scientific evaluation are required before biological solutions become realistic options.
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Affiliation(s)
- Pankaj Sharma
- Department of Trauma and Orthopaedics, Keele University School of Medicine, Thornburrow Drive, Hartshill, Stoke-on-Trent, Staffordshire, ST4 7QB, United Kingdom
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44
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Bhattacharya SK, Rockwood EJ, Smith SD, Bonilha VL, Crabb JS, Kuchtey RW, Robertson NG, Peachey NS, Morton CC, Crabb JW. Proteomics reveal Cochlin deposits associated with glaucomatous trabecular meshwork. J Biol Chem 2004; 280:6080-4. [PMID: 15579465 PMCID: PMC1483217 DOI: 10.1074/jbc.m411233200] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The etiology of primary open angle glaucoma, a leading cause of age-related blindness, remains poorly defined, although elevated intraocular pressure (IOP) contributes to the disease progression. To better understand the mechanisms causing elevated IOP from aqueous humor circulation, we pursued proteomic analyses of trabecular meshwork (TM) from glaucoma and age-matched control donors. These analyses demonstrated that Cochlin, a protein associated with deafness disorder DFNA9, is present in glaucomatous but absent in normal TM. Cochlin was also detected in TM from the glaucomatous DBA/2J mouse preceding elevated IOP but found to be absent in three other mouse lines that do not develop elevated IOP. Histochemical analyses revealed co-deposits of Cochlin and mucopolysaccharide in human TM around Schlemm's canal, similar to that observed in the cochlea in DFNA9 deafness. Purified Cochlin was found to aggregate after sheer stress and to induce the aggregation of TM cells in vitro. Age-dependent in vivo increases in Cochlin were observed in glaucomatous TM, concomitant with a decrease in type II collagen, suggesting that Cochlin may disrupt the TM architecture and render components like collagen more susceptible to degradation and collapse. Overall, these observations suggest that Cochlin contributes to elevated IOP in primary open angle glaucoma through altered interactions within the TM extracellular matrix, resulting in cell aggregation, mucopolysaccharide deposition, and significant obstruction of the aqueous humor circulation.
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Affiliation(s)
- Sanjoy K Bhattacharya
- Cole Eye Institute and Lerner Research Institute (i31), Cleveland Clinic Foundation, Cleveland, OH 44195, USA.
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Wenstrup RJ, Florer JB, Brunskill EW, Bell SM, Chervoneva I, Birk DE. Type V collagen controls the initiation of collagen fibril assembly. J Biol Chem 2004; 279:53331-7. [PMID: 15383546 DOI: 10.1074/jbc.m409622200] [Citation(s) in RCA: 346] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Vertebrate collagen fibrils are heterotypically composed of a quantitatively major and minor fibril collagen. In non-cartilaginous tissues, type I collagen accounts for the majority of the collagen mass, and collagen type V, the functions of which are poorly understood, is a minor component. Type V collagen has been implicated in the regulation of fibril diameter, and we reported recently preliminary evidence that type V collagen is required for collagen fibril nucleation (Wenstrup, R. J., Florer, J. B., Cole, W. G., Willing, M. C., and Birk, D. E. (2004) J. Cell. Biochem. 92, 113-124). The purpose of this study was to define the roles of type V collagen in the regulation of collagen fibrillogenesis and matrix assembly. Mouse embryos completely deficient in pro-alpha1(V) chains were created by homologous recombination. The col5a1-/- animals die in early embryogenesis, at approximately embryonic day 10. The type V collagen-deficient mice demonstrate a virtual lack of collagen fibril formation. In contrast, the col5a1+/- animals are viable. The reduced type V collagen content is associated with a 50% reduction in fibril number and dermal collagen content. In addition, relatively normal, cylindrical fibrils are assembled with a second population of large, structurally abnormal collagen fibrils. The structural properties of the abnormal matrix are decreased relative to the wild type control animals. These data indicate a central role for the evolutionary, ancient type V collagen in the regulation of fibrillogenesis. The complete dependence of fibril formation on type V collagen is indicative of the critical role of the latter in early fibril initiation. In addition, this fibril collagen is important in the determination of fibril structure and matrix organization.
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Affiliation(s)
- Richard J Wenstrup
- Division of Human Genetics, Cincinnati Children's Hospital Research Foundation, 3333 Burnet Ave., ML 4006, Cincinnati, OH 45229, USA.
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Chanut-Delalande H, Bonod-Bidaud C, Cogne S, Malbouyres M, Ramirez F, Fichard A, Ruggiero F. Development of a functional skin matrix requires deposition of collagen V heterotrimers. Mol Cell Biol 2004; 24:6049-57. [PMID: 15199158 PMCID: PMC480903 DOI: 10.1128/mcb.24.13.6049-6057.2004] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Collagen V is a minor component of the heterotypic I/III/V collagen fibrils and the defective product in most cases of classical Ehlers Danlos syndrome (EDS). The present study was undertaken to elucidate the impact of collagen V mutations on skin development, the most severely affected EDS tissues, using mice harboring a targeted deletion of the alpha2(V) collagen gene (Col5a2). Contrary to the original report, our studies indicate that the Col5a2 deletion (a.k.a. the pN allele) represents a functionally null mutation that affects matrix assembly through a complex sequence of events. First the mutation impairs assembly and/or secretion of the alpha1(V)(2)alpha2(V) heterotrimer with the result that the alpha1(V) homotrimer is the predominant species deposited into the matrix. Second, the alpha1(V) homotrimer is excluded from incorporation into the heterotypic collagen fibrils and this in turn severely impairs matrix organization. Third, the mutant matrix stimulates a compensatory loop by the alpha1(V) collagen gene that leads to additional deposition of alpha1(V) homotrimers. These data therefore underscore the importance of the collagen V heterotrimer in dermal fibrillogenesis. Furthermore, reduced thickness of the basement membranes underlying the epidermis and increased apoptosis of the stromal fibroblasts in pN/pN skin strongly indicate additional roles of collagen V in the development of a functional skin matrix.
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Affiliation(s)
- Hélène Chanut-Delalande
- Institut de Biologie et Chimie des Proteines, UMR CNRS 5086, IFR128 BioSciences Lyon-Gerland, France
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Alexakis C, Strup C, Mestries P, Mathé D, Caruelle JP, Barritault D, Kern P. Regulation of the collagen phenotype expression of gamma-irradiated vascular smooth muscle cells by heparan mimetics (RGTA). J Biomed Mater Res A 2004; 70:594-602. [PMID: 15307164 DOI: 10.1002/jbm.a.30119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Restenosis is characterized by vascular smooth muscle cell (VSMC) proliferation and accumulation of collagen III in a hypertrophic and disorganized extracellular matrix. Restenosis is prevented by antimitotic agents or irradiation but no significant progress has been made to control collagen expression deregulation. Previously, we have shown that a new family of biopolymers named RGTA (heparan mimetics elaborated by grafting on dextran of carboxylate, sulfate, and benzylamide units) stimulate in vivo tissue repair and reduce fibrosis in various models. Using VSMC in vitro (pig aortic VSMC irradiated with a 60Co source and labeled with [3H]Proline), we now show that gamma-irradiation reduced cell survival by 50% and collagen synthesis 6-fold with a major increase in the ratio of collagen III to collagen I biosynthesis taken as a fibrotic index. RGTA added to the cells enhanced their survival up to 80% and reduced collagen III/I ratio back to values found in normal vascular tissues. These results suggest that RGTA combined with gamma-radiation could be an efficient strategy against restenosis.
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Affiliation(s)
- C Alexakis
- CRRET/CNRS FRE 2412, Faculté des Sciences de Créteil, Université Paris-12, Avenue du Général de Gaulle, F-94010 Créteil Cedex, France
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Alexakis C, Mestries P, Garcia S, Petit E, Barbier V, Papy-Garcia D, Sagot MA, Barritault D, Caruelle JP, Kern P. Structurally different RGTAs modulate collagen-type expression by cultured aortic smooth muscle cells via different pathways involving fibroblast growth factor-2 or transforming growth factor-beta1. FASEB J 2004; 18:1147-9. [PMID: 15132978 DOI: 10.1096/fj.03-1126fje] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We have engineered polymers called ReGeneraTing Agents (RGTAs), which mimic the protecting and potentiating properties of heparan sulfates toward heparin-binding growth factors (HBGF). RGTAs have been shown to optimize cell growth and regulate collagen production in vitro. Here, we studied relationships between RGTA structure and collagen-type expression in aortic smooth muscle cells by using two RGTAs, the carboxylmethylsulfate dextran RG-1503 and the carboxylmethylsulfate dextran with added benzylamide RG-1192. RG-1192 specifically induced a fivefold decrease in collagen III synthesis. This effect was abolished by FGF-2 neutralizing antibody. RG-1192 and FGF-2 acted synergistically to decrease collagen III. RG-1192 was more effective than heparin in this process. RG-1192 increased the pericellular localization of FGF-2 and protected FGF-2 from proteolysis. Surface plasmon resonance analysis indicated a Kd of 15.7 nM for the RG-1192/FGF-2 interaction (10.6 nM for the heparin/FGF-2 interaction). The structurally different RG-1503 (without benzylamide) did not interact with FGF-2 and worked synergistically with TGF-beta1 to specifically induce a twofold increase in collagen V. RGTAs with different structures exert different modulating effects on the collagen phenotype. Selection of appropriate RGTAs, which had been shown to enhance in vivo tissue repair, may provide a mean of correcting collagen abnormalities in vascular disorders and more generally in fibrotic diseases.
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Affiliation(s)
- Catherine Alexakis
- CRRET/CNRS FRE 2412, Faculté des Sciences, Université de Paris 12, Créteil Cedex, France
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Wenstrup RJ, Florer JB, Cole WG, Willing MC, Birk DE. Reduced type I collagen utilization: A pathogenic mechanism in COL5A1 haplo-insufficient Ehlers-Danlos syndrome. J Cell Biochem 2004; 92:113-24. [PMID: 15095409 DOI: 10.1002/jcb.20024] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To examine mechanisms by which reduced type V collagen causes weakened connective tissues in the Ehlers-Danlos syndrome (EDS), we examined matrix deposition and collagen fibril morphology in long-term dermal fibroblast cultures. EDS cells with COL5A1 haplo-insufficiency deposited less than one-half of hydroxyproline as collagen compared to control fibroblasts, though total collagen synthesis rates are near-normal because type V collagen represents a small fraction of collagen synthesized. Cells from patients with osteogenesis imperfecta (OI) and haplo-insufficiency for proalpha1(I) chains of type I collagen also incorporated about one-half the collagen as controls, but this amount was proportional to their reduced rates of total collagen synthesis. Collagen fibril diameter was inversely proportional to type V/type I collagen ratios (EDS > control > OI). However, a reduction of type V collagen, in the EDS derived cells, was associated with the assembly of significantly fewer fibrils compared to control and OI cells. These data indicate that in cell culture, the quantity of collagen fibrils deposited in matrix is highly sensitive to reduction in type V collagen, far out of proportion to type V collagen's contribution to collagen mass.
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Affiliation(s)
- Richard J Wenstrup
- Division of Human Genetics, Children's Hospital Research Foundation, Cincinnati, Ohio 45229-3039, USA.
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Rosch R, Junge K, Knops M, Lynen P, Klinge U, Schumpelick V. Analysis of collagen-interacting proteins in patients with incisional hernias. Langenbecks Arch Surg 2003; 387:427-32. [PMID: 12607124 DOI: 10.1007/s00423-002-0345-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2002] [Accepted: 11/25/2002] [Indexed: 10/25/2022]
Abstract
BACKGROUND In recent years a disorder of the collagen metabolism has been suggested for the pathogenesis of abdominal wall hernias. Previous investigations of skin specimens revealed a reduction in the collagen I/III ratio and alterations in matrix metalloproteinases in patients with incisional hernias. We investigated known collagen-interacting proteins to further characterize connective tissue in these patients. PATIENTS AND METHODS Skin scars from patients with either primary or recurrent incisional and recurrent inguinal hernias, as a subgroup of incisional hernias, were analyzed for overall collagen content and for the distribution of collagen types I and III by crosspolarization microscopy. The expression of collagen type V, collagen receptor discoidin domain receptor 2, matrix metalloproteinase 1, connective tissue-like growth factor, and tenascin was determined by immunohistochemistry. Mature abdominal skin scars from patients without evident hernia served as controls. RESULTS Patients with recurrent incisional hernia showed lowest ratios of collagen types I to III. Contents of overall collagen and of collagen type V did not differ between the groups. In patients with either primary or recurrent incisional hernias the proportion of collagen receptor discoidin domain receptor 2 positive cells was increased. Matrix metalloproteinase 1 expression was more pronounced in patients with recurrent incisional or inguinal hernias than in controls. Connective tissue-like growth factor was significantly increased in recurrent inguinal hernia patients. The expression of tenascin was notably decreased in all hernia groups. CONCLUSIONS The observed alterations in the expression of collagen-interacting proteins again indicate the possibility of a fundamental connective tissue disease as the causal factor in the pathogenesis of (recurrent) incisional hernias.
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Affiliation(s)
- R Rosch
- Department of Surgery, University Hospital, RWTH, Pauwelsstrasse 30, 52074, Aachen, Germany.
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