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Onursal C, Dick E, Angelidis I, Schiller HB, Staab-Weijnitz CA. Collagen Biosynthesis, Processing, and Maturation in Lung Ageing. Front Med (Lausanne) 2021; 8:593874. [PMID: 34095157 PMCID: PMC8172798 DOI: 10.3389/fmed.2021.593874] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 03/24/2021] [Indexed: 12/15/2022] Open
Abstract
In addition to providing a macromolecular scaffold, the extracellular matrix (ECM) is a critical regulator of cell function by virtue of specific physical, biochemical, and mechanical properties. Collagen is the main ECM component and hence plays an essential role in the pathogenesis and progression of chronic lung disease. It is well-established that many chronic lung diseases, e.g., chronic obstructive pulmonary disease (COPD) and idiopathic pulmonary fibrosis (IPF) primarily manifest in the elderly, suggesting increased susceptibility of the aged lung or accumulated alterations in lung structure over time that favour disease. Here, we review the main steps of collagen biosynthesis, processing, and turnover and summarise what is currently known about alterations upon lung ageing, including changes in collagen composition, modification, and crosslinking. Recent proteomic data on mouse lung ageing indicates that, while the ER-resident machinery of collagen biosynthesis, modification and triple helix formation appears largely unchanged, there are specific changes in levels of type IV and type VI as well as the two fibril-associated collagens with interrupted triple helices (FACIT), namely type XIV and type XVI collagens. In addition, levels of the extracellular collagen crosslinking enzyme lysyl oxidase are decreased, indicating less enzymatically mediated collagen crosslinking upon ageing. The latter contrasts with the ageing-associated increase in collagen crosslinking by advanced glycation endproducts (AGEs), a result of spontaneous reactions of protein amino groups with reactive carbonyls, e.g., from monosaccharides or reactive dicarbonyls like methylglyoxal. Given the slow turnover of extracellular collagen such modifications accumulate even more in ageing tissues. In summary, the collective evidence points mainly toward age-induced alterations in collagen composition and drastic changes in the molecular nature of collagen crosslinks. Future work addressing the consequences of these changes may provide important clues for prevention of lung disease and for lung bioengineering and ultimately pave the way to novel targeted approaches in lung regenerative medicine.
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Affiliation(s)
- Ceylan Onursal
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Elisabeth Dick
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Ilias Angelidis
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Herbert B Schiller
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Claudia A Staab-Weijnitz
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany
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2
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Fertala A. Three Decades of Research on Recombinant Collagens: Reinventing the Wheel or Developing New Biomedical Products? Bioengineering (Basel) 2020; 7:E155. [PMID: 33276472 PMCID: PMC7712652 DOI: 10.3390/bioengineering7040155] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/16/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023] Open
Abstract
Collagens provide the building blocks for diverse tissues and organs. Furthermore, these proteins act as signaling molecules that control cell behavior during organ development, growth, and repair. Their long half-life, mechanical strength, ability to assemble into fibrils and networks, biocompatibility, and abundance from readily available discarded animal tissues make collagens an attractive material in biomedicine, drug and food industries, and cosmetic products. About three decades ago, pioneering experiments led to recombinant human collagens' expression, thereby initiating studies on the potential use of these proteins as substitutes for the animal-derived collagens. Since then, scientists have utilized various systems to produce native-like recombinant collagens and their fragments. They also tested these collagens as materials to repair tissues, deliver drugs, and serve as therapeutics. Although many tests demonstrated that recombinant collagens perform as well as their native counterparts, the recombinant collagen technology has not yet been adopted by the biomedical, pharmaceutical, or food industry. This paper highlights recent technologies to produce and utilize recombinant collagens, and it contemplates their prospects and limitations.
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Affiliation(s)
- Andrzej Fertala
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Curtis Building, Room 501, 1015 Walnut Street, Philadelphia, PA 19107, USA
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3
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Sand JMB, Lamy P, Juhl P, Siebuhr AS, Iversen LV, Nawrocki A, Larsen MR, Domsic RT, Franchimont N, Chavez J, Karsdal MA, Leeming DJ. Development of a Neo-Epitope Specific Assay for Serological Assessment of Type VII Collagen Turnover and Its Relevance in Fibroproliferative Disorders. Assay Drug Dev Technol 2018; 16:123-131. [PMID: 29493258 DOI: 10.1089/adt.2017.820] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Type VII collagen is the main component of the anchoring fibrils connecting the basement membrane to the underlying interstitial matrix. Mutations in the type VII collagen gene cause dystrophic epidermolysis bullosa. Increased levels of type VII collagen in the skin have been reported in patients with systemic sclerosis (SSc), whereas reduced levels in the airways have been related to asthma. This indicates that type VII collagen plays an important part in upholding tissue integrity and that its remodeling may lead to pathological states. The aim of this study was to investigate the role of type VII collagen remodeling in fibroproliferative disorders. We produced monoclonal antibody targeting a specific fragment of type VII collagen (C7M) released to the systemic circulation and developed a neo-epitope specific competitive enzyme-linked immunosorbent assay (ELISA). Biological relevance was evaluated in serum from patients with SSc or chronic obstructive pulmonary disease (COPD). The C7M ELISA was technically robust and specific for the C7M neo-epitope. Serum C7M levels were significantly elevated in two cohorts of patients with SSc and in patients with COPD as compared with healthy individuals (P < 0.0001). The C7M ELISA enabled quantification of type VII collagen turnover in serum. Elevated serum C7M levels indicated that the turnover rate of type VII collagen was significantly increased in patients with SSc or COPD, suggesting a pathological role. Thus, the C7M ELISA may become useful in future investigations of type VII collagen turnover in fibroproliferative disorders, and it may prove a valuable tool for evaluating novel anti-fibrotic drugs.
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Affiliation(s)
- Jannie M B Sand
- 1 Biomarkers and Research , Nordic Bioscience, Herlev, Denmark
| | - Patricia Lamy
- 1 Biomarkers and Research , Nordic Bioscience, Herlev, Denmark
| | - Pernille Juhl
- 1 Biomarkers and Research , Nordic Bioscience, Herlev, Denmark
| | | | - Line V Iversen
- 2 Department of Dermatology, Bispebjerg Hospital, University of Copenhagen , Copenhagen, Denmark
| | - Arkadiusz Nawrocki
- 3 Department of Biochemistry and Molecular Biology, University of Southern Denmark , Odense M, Denmark
| | - Martin R Larsen
- 3 Department of Biochemistry and Molecular Biology, University of Southern Denmark , Odense M, Denmark
| | - Robyn T Domsic
- 4 Department of Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania
| | | | - Juan Chavez
- 5 Research and Early Development , Biogen, Cambridge, Massachusetts
| | | | - Diana J Leeming
- 1 Biomarkers and Research , Nordic Bioscience, Herlev, Denmark
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4
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Chmel N, Bornert O, Hausser I, Grüninger G, Borozkin W, Kohlhase J, Nyström A, Has C. Large Deletions Targeting the Triple-Helical Domain of Collagen VII Lead to Mild Acral Dominant Dystrophic Epidermolysis Bullosa. J Invest Dermatol 2017; 138:987-991. [PMID: 29179948 DOI: 10.1016/j.jid.2017.11.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 11/12/2017] [Accepted: 11/14/2017] [Indexed: 02/08/2023]
Affiliation(s)
- Nadja Chmel
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Olivier Bornert
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Ingrid Hausser
- Institute of Pathology, University Hospital Heidelberg, Germany
| | - Gabriele Grüninger
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | | | | | - Alexander Nyström
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany
| | - Cristina Has
- Department of Dermatology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Germany.
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5
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Ben Brick AS, Laroussi N, Mesrati H, Kefi R, Ouragini H, Bchetnia M, Romdhane L, Marrakchi S, Boubaker MS, Castiglia D, Hovnanian A, Abdelhak S, Turki H, Kharfi M. Genetic basis of dominant dystrophic epidermolysis bullosa in tunisian families and co-occurrence of dominant and recessive mutations. J Eur Acad Dermatol Venereol 2014; 30:155-7. [PMID: 25088787 DOI: 10.1111/jdv.12645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A S Ben Brick
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - N Laroussi
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - H Mesrati
- Département de Dermatologie, Hôpital Hedi Chaker, Sfax, Tunisia
| | - R Kefi
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - H Ouragini
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - M Bchetnia
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - L Romdhane
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - S Marrakchi
- Département de Dermatologie, Hôpital Hedi Chaker, Sfax, Tunisia
| | - M S Boubaker
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - D Castiglia
- Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell'Immacolata-IRCCS, Roma, Italy
| | - A Hovnanian
- INSERM, UMR 1163, Paris, France.,Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Paris, France.,Department de Génétique, Hôpital Necker, Paris, France
| | - S Abdelhak
- LR11IPT05, Laboratory of Biomedical Genomics and Oncogenetics, Institut Pasteur de Tunis, Université Tunis El Manar, Tunis, Tunisia
| | - H Turki
- Département de Dermatologie, Hôpital Hedi Chaker, Sfax, Tunisia
| | - M Kharfi
- Département de Dermatologie, Hôpital Charles Nicolle, Tunis, Tunisia
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6
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Yu Z, An B, Ramshaw JA, Brodsky B. Bacterial collagen-like proteins that form triple-helical structures. J Struct Biol 2014; 186:451-61. [DOI: 10.1016/j.jsb.2014.01.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 01/09/2014] [Accepted: 01/09/2014] [Indexed: 02/06/2023]
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7
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Jeon IK, Kim SE, Kim SC. Novel compound heterozygous mutation inLAMC2genes (c.79G>A and 382insT) in Herlitz junctional epidermolysis bullosa. J Dermatol 2014; 41:322-4. [DOI: 10.1111/1346-8138.12413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 12/20/2013] [Indexed: 02/02/2023]
Affiliation(s)
- In Kyung Jeon
- Department of Dermatology; Gangnam Severance Hospital; Cutaneous Biology Research Institute; Yonsei University College of Medicine; Seoul Korea
| | - Song-Ee Kim
- Department of Dermatology; Gangnam Severance Hospital; Cutaneous Biology Research Institute; Yonsei University College of Medicine; Seoul Korea
| | - Soo-Chan Kim
- Department of Dermatology; Gangnam Severance Hospital; Cutaneous Biology Research Institute; Yonsei University College of Medicine; Seoul Korea
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8
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Torricelli AAM, Singh V, Santhiago MR, Wilson SE. The corneal epithelial basement membrane: structure, function, and disease. Invest Ophthalmol Vis Sci 2013; 54:6390-400. [PMID: 24078382 DOI: 10.1167/iovs.13-12547] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The corneal epithelial basement membrane (BM) is positioned between basal epithelial cells and the stroma. This highly specialized extracellular matrix functions not only to anchor epithelial cells to the stroma and provide scaffolding during embryonic development but also during migration, differentiation, and maintenance of the differentiated epithelial phenotype. Basement membranes are composed of a diverse assemblage of extracellular molecules, some of which are likely specific to the tissue where they function; but in general they are composed of four primary components--collagens, laminins, heparan sulfate proteoglycans, and nidogens--in addition to other components such as thrombospondin-1, matrilin-2, and matrilin-4 and even fibronectin in some BM. Many studies have focused on characterizing BM due to their potential roles in normal tissue function and disease, and these structures have been well characterized in many tissues. Comparatively few studies, however, have focused on the function of the epithelial BM in corneal physiology. Since the normal corneal stroma is avascular and has relatively low keratocyte density, it is expected that the corneal BM would be different from the BM in other tissues. One function that appears critical in homeostasis and wound healing is the barrier function to penetration of cytokines from the epithelium to stroma (such as transforming growth factor β-1), and possibly from stroma to epithelium (such as keratinocyte growth factor). The corneal epithelial BM is also involved in many inherited and acquired corneal diseases. This review examines this structure in detail and discusses the importance of corneal epithelial BM in homeostasis, wound healing, and disease.
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9
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Perlecan Domain V induces VEGf secretion in brain endothelial cells through integrin α5β1 and ERK-dependent signaling pathways. PLoS One 2012; 7:e45257. [PMID: 23028886 PMCID: PMC3444475 DOI: 10.1371/journal.pone.0045257] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 08/17/2012] [Indexed: 11/26/2022] Open
Abstract
Perlecan Domain V (DV) promotes brain angiogenesis by inducing VEGF release from brain endothelial cells (BECs) following stroke. In this study, we define the specific mechanism of DV interaction with the α5β1 integrin, identify the downstream signal transduction pathway, and further investigate the functional significance of resultant VEGF release. Interestingly, we found that the LG3 portion of DV, which has been suggested to possess most of DV’s angio-modulatory activity outside of the brain, binds poorly to α5β1 and induces less BEC proliferation compared to full length DV. Additionally, we implicate DV’s DGR sequence as an important element for the interaction of DV with α5β1. Furthermore, we investigated the importance of AKT and ERK signaling in DV-induced VEGF expression and secretion. We show that DV increases the phosphorylation of ERK, which leads to subsequent activation and stabilization of eIF4E and HIF-1α. Inhibition of ERK activity by U0126 suppressed DV-induced expression and secretion of VEGR in BECs. While DV was capable of phosphorylating AKT we show that AKT phosphorylation does not play a role in DV’s induction of VEGF expression or secretion using two separate inhibitors, LY294002 and Akt IV. Lastly, we demonstrate that VEGF activity is critical for DV increases in BEC proliferation, as well as angiogenesis in a BEC-neuronal co-culture system. Collectively, our findings expand our understanding of DV’s mechanism of action on BECs, and further support its potential as a novel stroke therapy.
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10
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Steplewski A, Kasinskas A, Fertala A. Remodeling of the dermal-epidermal junction in bilayered skin constructs after silencing the expression of the p.R2622Q and p.G2623C collagen VII mutants. Connect Tissue Res 2012; 53:379-89. [PMID: 22352907 PMCID: PMC4246506 DOI: 10.3109/03008207.2012.668252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The integrity of skin depends on a complex system of extracellular matrix molecules that form a biological scaffold. One of its elements is the dermal basement membrane that provides a link between the epidermis and the dermis. Mutations in collagen VII, a key component of the dermal membrane zone, are associated with dystrophic epidermolysis bullosa. Although it has been proposed that silencing the mutated COL7A1 allele is a promising approach to restore the dermal basement membrane zone formed in the presence of collagen VII mutants, limitations exist to testing this proposal. Here, we employed a model that utilized skin-like constructs in which engineered collagen VII mutant chains harboring the R2622Q or G2623C substitution were expressed conditionally, but the wild-type chains were expressed unconditionally. We demonstrated that switching off the production of the mutant collagen VII chains in skin constructs restores the organization of collagen VII and laminin 332 deposits in the dermal-epidermal junction to the level of control. We also demonstrated that remodeling of collagen IV deposits was not fully effective after silencing the expression of collagen VII mutants. Thus, our study suggests that while silencing mutant alleles of COL7A1 may repair critical elements of the affected dermal basement membrane, it may not be sufficient to fully remodel its entire architecture initially formed in the presence of the mutant collagen VII chains.
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Affiliation(s)
- Andrzej Steplewski
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Anthony Kasinskas
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Andrzej Fertala
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania,Correspondence to: Andrzej Fertala, Department of Orthopaedic Surgery, Jefferson Medical College, Thomas Jefferson University, Curtis Building, Room 501, 1015 Walnut Street, Philadelphia, PA 19107., Tel: 215-503-0113,
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11
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Lee B, Clarke D, Al Ahmad A, Kahle M, Parham C, Auckland L, Shaw C, Fidanboylu M, Orr AW, Ogunshola O, Fertala A, Thomas SA, Bix GJ. Perlecan domain V is neuroprotective and proangiogenic following ischemic stroke in rodents. J Clin Invest 2011; 121:3005-23. [PMID: 21747167 DOI: 10.1172/jci46358] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 05/18/2011] [Indexed: 12/27/2022] Open
Abstract
Stroke is the leading cause of long-term disability and the third leading cause of death in the United States. While most research thus far has focused on acute stroke treatment and neuroprotection, the exploitation of endogenous brain self-repair mechanisms may also yield therapeutic strategies. Here, we describe a distinct type of stroke treatment, the naturally occurring extracellular matrix fragment of perlecan, domain V, which we found had neuroprotective properties and enhanced post-stroke angiogenesis, a key component of brain repair, in rodent models of stroke. In both rat and mouse models, Western blot analysis revealed elevated levels of perlecan domain V. When systemically administered 24 hours after stroke, domain V was well tolerated, reached infarct and peri-infarct brain vasculature, and restored stroke-affected motor function to baseline pre-stroke levels in these multiple stroke models in both mice and rats. Post-stroke domain V administration increased VEGF levels via a mechanism involving brain endothelial cell α5β1 integrin, and the subsequent neuroprotective and angiogenic actions of domain V were in turn mediated via VEGFR. These results suggest that perlecan domain V represents a promising approach for stroke treatment.
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Affiliation(s)
- Boyeon Lee
- Department of Molecular and Cellular Medicine, Texas A&M College of Medicine, College Station, Texas 77843, USA
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12
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Chung HJ, Steplewski A, Uitto J, Fertala A. Fluorescent protein markers to tag collagenous proteins: the paradigm of procollagen VII. Biochem Biophys Res Commun 2009; 390:662-6. [PMID: 19822129 PMCID: PMC2796180 DOI: 10.1016/j.bbrc.2009.10.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 10/06/2009] [Indexed: 10/20/2022]
Abstract
Fluorescent proteins are powerful markers allowing tracking expression, intracellular localization, and translocation of tagged proteins but their effects on the structure and assembly of complex extracellular matrix proteins has not been investigated. Here, we analyzed the utility of fluorescent proteins as markers for procollagen VII, a triple-helical protein critical for the integrity of dermal-epidermal junction. DNA constructs encoding a red fluorescent protein-tagged wild type mini-procollagen VII alpha chain and green fluorescent protein-tagged alpha chains harboring selected mutations were genetically engineered. These DNA constructs were co-expressed in HEK-293 cells and the assembly of heterogeneous triple-helical mini-procollagen VII molecules was analyzed. Immunoprecipitation and fluorescence resonance energy transfer assays demonstrated that the presence of different fluorescent protein markers at the C-termini of individual alpha chains neither altered formation of triple-helical molecules nor affected their secretion to the extracellular space. Our study provides a basis for employing fluorescent proteins as tags for complex structural proteins of extracellular matrix.
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Affiliation(s)
- Hye Jin Chung
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, 19107, U.S.A
| | - Andrzej Steplewski
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, 19107, U.S.A
| | - Jouni Uitto
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, 19107, U.S.A
| | - Andrzej Fertala
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, 19107, U.S.A
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13
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Dang N, Murrell DF. Mutation analysis and characterization of COL7A1 mutations in dystrophic epidermolysis bullosa. Exp Dermatol 2008; 17:553-68. [PMID: 18558993 DOI: 10.1111/j.1600-0625.2008.00723.x] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Dystrophic epidermolysis bullosa (DEB) is inherited in both an autosomal dominant DEB and autosomal recessive manner RDEB, both of which result from mutations in the type VII collagen gene (COL7A1). To date, 324 pathogenic mutations have been detected within COL7A1 in different variants of DEB; many mutations are clustered in exon 73 (10.74%) which is close to the 39 amino acid interruption region. Dominant dystrophic epidermolysis bullosa usually involves glycine substitutions within the triple helix of COL7A1 although other missense mutations, deletions or splice-site mutations may underlie some cases. In recessive dystrophic epidermolysis bullosa, the mutations include nonsense, splice site, deletions or insertions, 'silent' glycine substitutions within the triple helix and non-glycine missense mutations within the triple helix or non-collagenous NC-2 domain. The nature of mutations in COL7A1 and their positions correlate reasonably logically with the severity of the resulting phenotypes.
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Affiliation(s)
- Ningning Dang
- Department of Dermatology, St George Hospital, Sydney, Australia
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14
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Woodley DT, Hou Y, Martin S, Li W, Chen M. Characterization of molecular mechanisms underlying mutations in dystrophic epidermolysis bullosa using site-directed mutagenesis. J Biol Chem 2008; 283:17838-45. [PMID: 18450758 PMCID: PMC2440610 DOI: 10.1074/jbc.m709452200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 04/23/2008] [Indexed: 11/06/2022] Open
Abstract
Type VII collagen (C7) is a major component of anchoring fibrils, structures that mediate epidermal-dermal adherence. Mutations in gene COL7A1 encoding for C7 cause dystrophic epidermolysis bullosa (DEB), a genetic mechano-bullous disease. The biological consequences of specific COL7A1 mutations and the molecular mechanisms leading to DEB clinical phenotypes are unknown. In an attempt to establish genotype-phenotype relationships, we generated four individual substitution mutations that have been associated with recessive DEB, G2049E, R2063W, G2569R, and G2575R, and purified the recombinant mutant proteins. All mutant proteins were synthesized and secreted as a 290-kDa mutant C7 alpha chain at levels similar to wild type C7. The G2569R and G2575R glycine substitution mutations resulted in mutant C7 with increased sensitivity to protease degradation and decreased ability to form trimers. Limited proteolytic digestion of mutant G2049E and R2063W proteins yielded aberrant fragments and a triple helix with reduced stability. These two mutations next to the 39-amino acid helical interruption hinge region caused local destabilization of the triple-helix that exposed an additional highly sensitive proteolytic site within the region of the mutation. Our functional studies demonstrated that C7 is a potent pro-motility matrix for skin human keratinocyte migration and that this activity resides within the triple helical domain. Furthermore, G2049E and R2063W mutations reduced the ability of C7 to support fibroblast adhesion and keratinocyte migration. We conclude that known recessive DEB C7 mutations perturb critical functions of the C7 molecule and likely contribute to the clinical phenotypes of DEB patients.
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Affiliation(s)
- David T Woodley
- Department of Dermatology, The Keck School of Medicine at the University of Southern California, Los Angeles, CA 90033, USA.
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15
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Saito M, Masunaga T, Teraki Y, Takamori K, Ishiko A. Genotype-phenotype correlations in six Japanese patients with recessive dystrophic epidermolysis bullosa with the recurrent p.Glu2857X mutation. J Dermatol Sci 2008; 52:13-20. [PMID: 18440202 DOI: 10.1016/j.jdermsci.2008.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 03/01/2008] [Accepted: 03/03/2008] [Indexed: 11/25/2022]
Abstract
BACKGROUND General genotype-phenotype correlations have been delineated in recessive dystrophic epidermolysis bullosa (RDEB), but these remain complicated and it is still difficult to assess the clinical consequences of individual COL7A1 mutations. OBJECTIVE To characterize recurrent p.Glu2857X mutations and show how other COL7A1 mutations influence the phenotype in RDEB patients harboring p.Glu2857X. METHODS Genotype-phenotype correlations were studied in six Japanese RDEB patients with the p.Glu2857X mutation. RESULTS Besides the common p.Glu2857X mutation, premature termination codon (PTC) mutations were found in three patients, glycine substitution missense mutations in two patients, and a non-glycine substitution missense mutation in one patient. PTC mutations in both alleles generally cause the most severe, mutilating Hallopeau-Siemens (HS) variant of RDEB, whereas none of the PTC mutations resulted in severe phenotypes consistent with the HS subtype when coupled with p.Glu2857X. Missense glycine and non-glycine mutations caused phenotypes of differing severity, suggesting that the extent of destabilization of anchoring fibrils depends on the type of mutation. CONCLUSION A p.Glu2857X mutation exhibits mild pathogenic effects compared to other PTC mutations in COL7A1, and its uniqueness enables detailed analysis and comparison of the destabilizing effects of missense mutations in RDEB patients.
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Affiliation(s)
- Masataka Saito
- Department of Dermatology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
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16
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Huffman NT, Keightley JA, Chaoying C, Midura RJ, Lovitch D, Veno PA, Dallas SL, Gorski JP. Association of specific proteolytic processing of bone sialoprotein and bone acidic glycoprotein-75 with mineralization within biomineralization foci. J Biol Chem 2007; 282:26002-13. [PMID: 17613519 PMCID: PMC2805412 DOI: 10.1074/jbc.m701332200] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mineral crystal nucleation in UMR 106-01 osteoblastic cultures occurs within 15-25-microm extracellular vesicle-containing biomineralization foci (BMF) structures. We show here that BAG-75 and BSP, biomarkers for these foci, are specifically enriched in laser capture microscope-isolated mineralized BMF as compared with the total cell layer. Unexpectedly, fragments of each protein (45-50 kDa in apparent size) were also enriched within captured BMF. When a series of inhibitors against different protease classes were screened, serine protease inhibitor 4-(2-aminoethyl)benzenesulfonylfluoride HCl (AEBSF) was the only one that completely blocked mineral nucleation within BMF in UMR cultures. AEBSF appeared to act on an osteoblast-derived protease at a late differentiation stage in this culture model just prior to mineral deposition. Similarly, mineralization of bone nodules in primary mouse calvarial osteoblastic cultures was completely blocked by AEBSF. Cleavage of BAG-75 and BSP was also inhibited at the minimum dosage of AEBSF sufficient to completely block mineralization of BMF. Two-dimensional SDS-PAGE comparisons of AEBSF-treated and untreated UMR cultures showed that fragmentation/activation of a limited number of other mineralization-related proteins was also blocked. Taken together, our results indicate for the first time that cleavage of BAG-75 and BSP by an AEBSF-sensitive, osteoblast-derived serine protease is associated with mineral crystal nucleation in BMF and suggest that such proteolytic events are a permissive step for mineralization to proceed.
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Affiliation(s)
- Nichole T Huffman
- Bone Biology Program, Department of Oral Biology, School of Dentistry, University of Missouri, Kansas City, Missouri 64108, USA
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17
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Huang J, Wong Po Foo C, Kaplan DL. Biosynthesis and Applications of Silk‐like and Collagen‐like Proteins. POLYM REV 2007. [DOI: 10.1080/15583720601109560] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Sawamura D, Mochitomi Y, Kanzaki T, Nakamura H, Shimizu H. Glycine substitution mutations by different amino acids at the same codon in COL7A1 cause different modes of dystrophic epidermolysis bullosa inheritance. Br J Dermatol 2007; 155:834-7. [PMID: 16965438 DOI: 10.1111/j.1365-2133.2006.07388.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D Sawamura
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Kita-ku, Sapporo 060-8638, Japan.
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19
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Chow FY, Nikolic-Paterson DJ, Ma FY, Ozols E, Rollins BJ, Tesch GH. Monocyte chemoattractant protein-1-induced tissue inflammation is critical for the development of renal injury but not type 2 diabetes in obese db/db mice. Diabetologia 2007; 50:471-80. [PMID: 17160673 DOI: 10.1007/s00125-006-0497-8] [Citation(s) in RCA: 190] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 09/05/2006] [Indexed: 01/12/2023]
Abstract
AIMS/HYPOTHESIS Tissue macrophage accumulation is thought to induce insulin resistance during obesity and stimulate the progression of diabetic nephropathy. Monocyte chemoattractant protein-1 (MCP-1) is a potent stimulator of macrophage recruitment. It is increased in adipose tissue during obesity and in diabetic kidneys, suggesting that inflammation of these tissues may be MCP-1-dependent. Based on these findings, the aim of this study was to examine whether a deficiency in MCP-1 would alter the development of type 2 diabetes and its renal complications. MATERIALS AND METHODS The role of MCP-1 in the progression of type 2 diabetes and its associated renal injury was assessed in obese db/db mice that were deficient in the gene encoding MCP-1 (Ccl2). RESULTS The incidence and development of type 2 diabetes were similar in Ccl2(+/+) and Ccl2(-/-) db/db mice between 8 and 32 weeks of age. Body mass, hyperglycaemia, hyperinsulinaemia, glucose and insulin tolerance, plasma triacylglycerol and serum NEFA were not different between these strains. Pathological changes in epididymal adipose tissue, including increases in macrophage accumulation and Tnfa mRNA and reductions in Adipoq mRNA, were unaffected by the absence of MCP-1. In contrast, kidney macrophage accumulation and the progression of diabetic renal injury (albuminuria, histopathology, renal fibrosis) were substantially reduced in Ccl2(-/-) compared with Ccl2(+/+) db/db mice with equivalent diabetes. CONCLUSIONS/INTERPRETATION Our study demonstrates that MCP-1 promotes type 2 diabetic renal injury but does not influence the development of obesity, insulin resistance or type 2 diabetes in db/db mice. MCP-1 plays a critical role in inflammation of the kidney, but not adipose tissue, during the progression of type 2 diabetes.
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Affiliation(s)
- F Y Chow
- Department of Nephrology, Monash Medical Centre, Clayton, VIC, 3168, Australia
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20
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Kar K, Amin P, Bryan MA, Persikov AV, Mohs A, Wang YH, Brodsky B. Self-association of Collagen Triple Helic Peptides into Higher Order Structures. J Biol Chem 2006; 281:33283-90. [PMID: 16963782 DOI: 10.1074/jbc.m605747200] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interest in self-association of peptides and proteins is motivated by an interest in the mechanism of physiologically higher order assembly of proteins such as collagen as well as the mechanism of pathological aggregation such as beta-amyloid formation. The triple helical form of (Pro-Hyp-Gly)(10), a peptide that has proved a useful model for molecular features of collagen, was found to self-associate, and its association properties are reported here. Turbidity experiments indicate that the triple helical peptide self-assembles at neutral pH via a nucleation-growth mechanism, with a critical concentration near 1 mM. The associated form is more stable than individual molecules by about 25 degrees C, and the association is reversible. The rate of self-association increases with temperature, supporting an entropically favored process. After self-association, (Pro-Hyp-Gly)(10) forms branched filamentous structures, in contrast with the highly ordered axially periodic structure of collagen fibrils. Yet a number of characteristics of triple helix assembly for the peptide resemble those of collagen fibril formation. These include promotion of fibril formation by neutral pH and increasing temperature; inhibition by sugars; and a requirement for hydroxyproline. It is suggested that these similar features for peptide and collagen self-association are based on common lateral underlying interactions between triple helical molecules mediated by hydrogen-bonded hydration networks involving hydroxyproline.
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Affiliation(s)
- Karunakar Kar
- Department of Biochemistry, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA
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21
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Brittingham R, Uitto J, Fertala A. High-affinity binding of the NC1 domain of collagen VII to laminin 5 and collagen IV. Biochem Biophys Res Commun 2006; 343:692-9. [PMID: 16563355 DOI: 10.1016/j.bbrc.2006.03.034] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Accepted: 03/02/2006] [Indexed: 11/16/2022]
Abstract
Anchoring functions of collagen VII depend on its ability to form homotypic fibrils and to bind to other macromolecules to form heterotypic complexes. Biosensor-based binding assays were employed to analyze the kinetics of the NC1 domain-mediated binding of collagen VII to laminin 5, collagen IV, and collagen I. We showed that collagen VII interacts with laminin 5 and collagen IV with a Kd value of 10(-9) M. In contrast, the NC1-mediated binding to collagen I was weak with a Kd value of 10(-6) M. Binding assays also showed that the NC1 domain utilizes the same region to bind to both laminin 5 and collagen IV. We postulate that the ability of the NC1 domains to bind with high affinities to laminin 5 and collagen IV facilitates stabilization of the structure of the basement membrane itself and that the NC1-collagen I interaction may be less important for stabilization of the dermal-epidermal junction.
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Affiliation(s)
- Raymond Brittingham
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, and Jefferson Institute of Molecular Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
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22
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Kern JS, Kohlhase J, Bruckner-Tuderman L, Has C. Expanding the COL7A1 Mutation Database: Novel and Recurrent Mutations and Unusual Genotype – Phenotype Constellations in 41 Patients with Dystrophic Epidermolysis Bullosa. J Invest Dermatol 2006; 126:1006-12. [PMID: 16484981 DOI: 10.1038/sj.jid.5700219] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Dystrophic epidermolysis bullosa (DEB), a heterogeneous hereditary skin disorder characterized by trauma-induced blistering and scarring, affects thousands of families worldwide. The clinical manifestations extend from minor nail dystrophy to severe life-threatening blistering, making early molecular diagnosis and prognostication of utmost importance for the affected families. DEB is caused by mutations in the COL7A1 gene encoding collagen VII in the skin. Molecular diagnostics and genotype-phenotype correlations in DEB remain complex owing to the gene structure, large variety of mutations, high rate of novel mutations, complex protein structure and assembly, and the heterogeneity of phenotypes. Here, we report an efficient strategy for COL7A1 mutation detection using direct automated DNA sequencing and implementation of software tools. With this approach, COL7A1 mutations of 41 DEB families were disclosed. Twenty-four mutations were novel and two recurrent. Elucidation of biological consequences of the mutations helped define disease mechanisms, but also revealed several unusual genotypic and/or phenotypic constellations, which impeded the diagnostics and prognostication. In addition, the studies disclosed a de novo mutation in recessive DEB and two new polymorphisms in the COL7A1 gene.
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Affiliation(s)
- Johannes S Kern
- Department of Dermatology, University of Freiburg, Hauptstrasse 7, Freiburg 79104, Germany
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23
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Fassihi H, Diba VC, Wessagowit V, Dopping-Hepenstal PJC, Jones CA, Burrows NP, McGrath JA. Transient bullous dermolysis of the newborn in three generations. Br J Dermatol 2006; 153:1058-63. [PMID: 16225626 DOI: 10.1111/j.1365-2133.2005.06873.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Transient bullous dermolysis of the newborn (TBDN) is a rare form of dystrophic epidermolysis bullosa (DEB) that presents with neonatal skin blistering but which usually improves markedly during early life or even remits completely. Skin biopsies reveal abnormal intraepidermal accumulation of type VII collagen which results in poorly constructed anchoring fibrils and a sublamina densa plane of blister formation. The reason for the spontaneous clinical improvement is not known, but there is a gradual recovery in type VII collagen secretion from basal keratinocytes to the dermal-epidermal junction, with subsequent improvement or correction of anchoring fibril morphology. In this report, we describe TBDN occurring in three generations of the same family. Blistering occurred only during the first few months after birth, and all affected individuals were found to have a heterozygous glycine substitution mutation in exon 45 of the type VII collagen gene, COL7A1, designated G1522E. This mutation represents the third report of a pathogenic COL7A1 mutation in TBDN. Despite limited understanding of the disease mechanism in TBDN, this distinct form of DEB is important to recognize as it typically has a benign and self-limiting course. However, not all cases of DEB associated with intraepidermal type VII collagen are 'transient'. Genetic counselling in such patients therefore should be guarded until the pathophysiology of TBDN is better understood.
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Affiliation(s)
- H Fassihi
- Genetic Skin Disease Group, St John's Institute of Dermatology, Guy's, King's and St Thomas' School of Medicine, St Thomas' Hospital, London SE1 7EH, UK
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24
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Abstract
We identified 1113 articles (103 reviews, 1010 primary research articles) published in 2005 that describe experiments performed using commercially available optical biosensors. While this number of publications is impressive, we find that the quality of the biosensor work in these articles is often pretty poor. It is a little disappointing that there appears to be only a small set of researchers who know how to properly perform, analyze, and present biosensor data. To help focus the field, we spotlight work published by 10 research groups that exemplify the quality of data one should expect to see from a biosensor experiment. Also, in an effort to raise awareness of the common problems in the biosensor field, we provide side-by-side examples of good and bad data sets from the 2005 literature.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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25
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Posteraro P, Pascucci M, Colombi M, Barlati S, Giannetti A, Paradisi M, Mustonen A, Zambruno G, Castiglia D. Denaturing HPLC-based approach for detection of COL7A1 gene mutations causing dystrophic epidermolysis bullosa. Biochem Biophys Res Commun 2005; 338:1391-401. [PMID: 16271705 DOI: 10.1016/j.bbrc.2005.10.097] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Accepted: 10/12/2005] [Indexed: 10/25/2022]
Abstract
Dystrophic epidermolysis bullosa (DEB) is a rare clinically heterogeneous genodermatosis due to genetic defects in type VII collagen gene (COL7A1). Identification of COL7A1 mutations is a challenge since this gene comprises 118 exons and more than 300 mutations scattered over the gene have been reported. Here, we describe for the first time the use of denaturing high performance liquid chromatography (DHPLC) for COL7A1 mutation detection. To validate the method, exon-specific DHPLC conditions were applied to screen DNA samples from patients carrying known COL7A1 mutations. Abnormal DHPLC profiles were obtained for all known mutations. Subsequent DHPLC analysis of 17 DEB families of unknown genotype allowed the identification of 21 distinct mutations, 9 of which were novel. The DHPLC mutation detection rate was significantly higher compared with our mutation scanning rate with conventional techniques (97% vs 86%), indicating DHPLC as the method of choice for COL7A1 molecular characterization in DEB patients.
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Affiliation(s)
- Patrizia Posteraro
- Department of Clinical and Molecular Pathology, IDI-Ospedale S. Carlo, Rome, Italy
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26
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Ito H, Rucker E, Steplewski A, McAdams E, Brittingham RJ, Alabyeva T, Fertala A. Guilty by association: some collagen II mutants alter the formation of ECM as a result of atypical interaction with fibronectin. J Mol Biol 2005; 352:382-95. [PMID: 16083907 DOI: 10.1016/j.jmb.2005.07.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2005] [Revised: 06/30/2005] [Accepted: 07/11/2005] [Indexed: 11/16/2022]
Abstract
Among the structural components of extracellular matrices (ECM) fibrillar collagens play a critical role, and single amino acid substitutions in these proteins lead to pathological changes in tissues in which they are expressed. Employing a biologically relevant experimental model consisting of cells expressing R75C, R519C, R789C, and G853E procollagen II mutants, we found that the R789C mutation causing a decrease in the thermostability of collagen not only alters individual collagen molecules and collagen fibrils, but also has a negative impact on fibronectin. We propose that thermolabile collagen molecules are able to bind to fibronectin, thereby altering intracellular and extracellular processes in which fibronectin takes part, and we postulate that such an atypical interaction could change the architecture of the ECM of affected tissues in patients harboring mutations in genes encoding fibrillar collagens.
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Affiliation(s)
- Hidetoshi Ito
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA
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