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Tavallaee G, Lively S, Rockel JS, Ali SA, Im M, Sarda C, Mitchell GM, Rossomacha E, Nakamura S, Potla P, Gabrial S, Matelski J, Ratneswaran A, Perry K, Hinz B, Gandhi R, Jurisica I, Kapoor M. Contribution of MicroRNA-27b-3p to Synovial Fibrotic Responses in Knee Osteoarthritis. Arthritis Rheumatol 2022; 74:1928-1942. [PMID: 35791923 PMCID: PMC10946865 DOI: 10.1002/art.42285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 05/18/2022] [Accepted: 06/23/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Synovial fibrosis contributes to osteoarthritis (OA) pathology, but the underlying mechanisms remain unknown. We have observed increased microRNA-27b-3p (miR-27b-3p) levels in synovial fluid of patients with late-stage radiographic knee OA. Here, we investigated the contribution of miR-27b-3p to synovial fibrosis in patients with severe knee OA and in a mouse model of knee OA. METHODS We stained synovium sections obtained from patients with radiographic knee OA scored according to the Kellgren/Lawrence scale and mice that underwent destabilization of the medial meniscus (DMM) for miR-27b-3p using in situ hybridization. We examined the effects of intraarticular injection of miR-27b-3p mimic into naive mouse knee joints and intraarticular injection of a miR-27b-3p inhibitor into mouse knee joints after DMM. We performed transfection with miR-27b-3p mimic and miR-27b-3p inhibitor in human OA fibroblast-like synoviocytes (FLS) using reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR) array, RNA sequencing, RT-qPCR, Western blotting, immunofluorescence, and migration assays. RESULTS We observed increased miR-27b-3p expression in the synovium from patients with knee OA and in mice with DMM-induced arthritis. Injection of the miR-27b-3p mimic in mouse knee joints induced a synovial fibrosis-like phenotype, increased synovitis scores, and increased COL1A1 and α-smooth muscle actin (α-SMA) expression. In the mouse model of DMM-induced arthritis, injection of the miR-27b-3p inhibitor decreased α-SMA but did not change COL1A1 expression levels or synovitis scores. Transfection with the miR-27b-3p mimic in human OA FLS induced profibrotic responses, including increased migration and expression of key extracellular matrix (ECM) genes, but transfection with the miR-27b-3p inhibitor had the opposite effects. RNA sequencing identified a PPARG/ADAMTS8 signaling axis regulated by miR-27b-3p in OA FLS. Human OA FLS transfected with miR-27b-3p mimic and then treated with the PPARG agonist rosiglitazone or with ADAMTS8 small interfering RNA exhibited altered expression of select ECM genes. CONCLUSION Our findings demonstrate that miR-27b-3p has a key role in ECM regulation associated with synovial fibrosis during OA.
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Affiliation(s)
- Ghazaleh Tavallaee
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, and Department of Laboratory Medicine and Pathobiology, University of TorontoTorontoOntarioCanada
| | - Starlee Lively
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Jason S. Rockel
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Shabana Amanda Ali
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, Toronto, Ontario, Canada, and Bone & Joint Center, Department of Orthopaedic Surgery, Henry Ford Health SystemDetroitMichigan
| | - Michelle Im
- Faculty of Dentistry, University of TorontoTorontoOntarioCanada
| | - Clementine Sarda
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Greniqueca M. Mitchell
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Evgeny Rossomacha
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Sayaka Nakamura
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Pratibha Potla
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Sarah Gabrial
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - John Matelski
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Anusha Ratneswaran
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Kim Perry
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, and Krembil Research Institute, University Health NetworkTorontoOntarioCanada
| | - Boris Hinz
- Faculty of Dentistry, University of Toronto, and Laboratory of Tissue Repair and Regeneration, Keenan Research Centre for Biomedical Science of the St. Michael's HospitalTorontoOntarioCanada
| | - Rajiv Gandhi
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, and Departments of Medical Biophysics and Computer Science, University of TorontoTorontoOntarioCanada
| | - Igor Jurisica
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, Toronto, Departments of Medical Biophysics and Computer Science, University of Toronto, Toronto, Ontario, Canada, and Institute of Neuroimmunology, Slovak Academy of SciencesBratislavaSlovakia
| | - Mohit Kapoor
- Osteoarthritis Research Program, Division of Orthopaedics, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, Department of Laboratory Medicine and Pathobiology, University of Toronto, and Division of Orthopaedic Surgery, Department of Surgery, University of TorontoTorontoOntarioCanada
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Coalson E, Bishop E, Liu W, Feng Y, Spezia M, Liu B, Shen Y, Wu D, Du S, Li AJ, Ye Z, Zhao L, Cao D, Li A, Hagag O, Deng A, Liu W, Li M, Haydon RC, Shi L, Athiviraham A, Lee MJ, Wolf JM, Ameer GA, He TC, Reid RR. Stem cell therapy for chronic skin wounds in the era of personalized medicine: From bench to bedside. Genes Dis 2019; 6:342-358. [PMID: 31832514 PMCID: PMC6888708 DOI: 10.1016/j.gendis.2019.09.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 09/07/2019] [Accepted: 09/09/2019] [Indexed: 02/06/2023] Open
Abstract
With the significant financial burden of chronic cutaneous wounds on the healthcare system, not to the personal burden mention on those individuals afflicted, it has become increasingly essential to improve our clinical treatments. This requires the translation of the most recent benchtop approaches to clinical wound repair as our current treatment modalities have proven insufficient. The most promising potential treatment options rely on stem cell-based therapies. Stem cell proliferation and signaling play crucial roles in every phase of the wound healing process and chronic wounds are often associated with impaired stem cell function. Clinical approaches involving stem cells could thus be utilized in some cases to improve a body's inhibited healing capacity. We aim to present the laboratory research behind the mechanisms and effects of this technology as well as current clinical trials which showcase their therapeutic potential. Given the current problems and complications presented by chronic wounds, we hope to show that developing the clinical applications of stem cell therapies is the rational next step in improving wound care.
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Affiliation(s)
- Elam Coalson
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Elliot Bishop
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of Surgery, Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Wei Liu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Key Laboratory of Diagnostic Medicine (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Yixiao Feng
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Key Laboratory of Diagnostic Medicine (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Mia Spezia
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Bo Liu
- Department of Surgery, Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Key Laboratory of Diagnostic Medicine (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Yi Shen
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of Orthopaedic Surgery, Xiangya Second Hospital of Central South University, Changsha 410011, China
| | - Di Wu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Scott Du
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Student Inquiry Research Program, Illinois Mathematics and Science Academy (IMSA), Aurora, IL 60506, USA
| | - Alexander J. Li
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Zhenyu Ye
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of General Surgery, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Ling Zhao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Key Laboratory of Diagnostic Medicine (Ministry of Education), College of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Daigui Cao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of Orthopaedic Surgery, Chongqing General Hospital, Chongqing 400013, China
| | - Alissa Li
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Ofir Hagag
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Alison Deng
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Student Inquiry Research Program, Illinois Mathematics and Science Academy (IMSA), Aurora, IL 60506, USA
| | - Winny Liu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Student Inquiry Research Program, Illinois Mathematics and Science Academy (IMSA), Aurora, IL 60506, USA
| | - Mingyang Li
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Student Inquiry Research Program, Illinois Mathematics and Science Academy (IMSA), Aurora, IL 60506, USA
| | - Rex C. Haydon
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Lewis Shi
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Aravind Athiviraham
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Michael J. Lee
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jennifer Moriatis Wolf
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Guillermo A. Ameer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60616, USA
- Center for Advanced Regenerative Engineering (CARE), Evanston, IL 60208, USA
| | - Tong-Chuan He
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Center for Advanced Regenerative Engineering (CARE), Evanston, IL 60208, USA
| | - Russell R. Reid
- Department of Surgery, Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Center for Advanced Regenerative Engineering (CARE), Evanston, IL 60208, USA
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Meng Z, Kang Z, Sun C, Yang S, Zhao B, Feng S, Meng Q, Liu K. Enhanced gene transfection efficiency by use of peptide vectors containing laminin receptor-targeting sequence YIGSR. NANOSCALE 2018; 10:1215-1227. [PMID: 29292451 DOI: 10.1039/c7nr05843h] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study presents the design and evaluation of a series of multifunctional peptides and their gene delivery abilities. The peptide sequences contained a cell-penetrating segment, six continuous histidine residues, a stearyl moiety and a laminin receptor-targeting segment. The YIGSR segment promoted cellular uptake through the interaction with laminin receptors on the surface of cells, which resulted in a great improvement in gene transfection efficiency. The conformation, particle size and zeta potential of peptide/DNA complexes were characterized via circular dichroism and dynamic light scattering. Their gene transfection efficiency was investigated by fluorescence-activated cell sorting and confocal microscopy. The transfection efficiency of the designed peptide vectors was higher than that of Lipo 2000. The peptide TAT-H6-K(C18)-YIGSR displayed transfection efficiencies at N/P ratios of 6, which was 3.5 and 7 times higher than that of Lipo 2000 in B16F10 and 293T cells, respectively. All peptides exhibited lower cytotoxicity than Lipo 2000 in B16F10 and 293T cells. In summary, the designed YIGSR-containing multifunctional peptide gene vectors promoted cellular uptake and gene transfection. Their in vivo transfection ability was investigated in zebrafish, and the transfection efficiency was determined by confocal microscopy and bioluminescence imaging. The peptide vectors, owing to their relatively short sequences and ease of functionalization, offer a promising approach for gene delivery because of their low cytotoxicity and high transfection efficiency.
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Affiliation(s)
- Zhao Meng
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing 100850, China.
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Vaicik MK, Blagajcevic A, Ye H, Morse MC, Yang F, Goddi A, Brey EM, Cohen RN. The Absence of Laminin α4 in Male Mice Results in Enhanced Energy Expenditure and Increased Beige Subcutaneous Adipose Tissue. Endocrinology 2018; 159:356-367. [PMID: 28973559 PMCID: PMC5761598 DOI: 10.1210/en.2017-00186] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 07/05/2017] [Indexed: 01/27/2023]
Abstract
Laminin α4 (LAMA4) is located in the extracellular basement membrane that surrounds each individual adipocyte. Here we show that LAMA4 null (Lama4-/-) mice exhibit significantly higher energy expenditure (EE) relative to wild-type (WT) mice at room temperature and when exposed to a cold challenge, despite similar levels of food intake and locomotor activity. The Lama4-/- mice are resistant to age- and diet-induced obesity. Expression of uncoupling protein 1 is higher in subcutaneous white adipose tissue of Lama4-/- mice relative to WT animals on either a chow diet or a high-fat diet. In contrast, uncoupling protein 1 expression was not increased in brown adipose tissue. Lama4-/- mice exhibit significantly improved insulin sensitivity compared with WT mice, suggesting improved metabolic function. Overall, these data provide critical evidence for a role of the basement membrane in EE, weight gain, and systemic insulin sensitivity.
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Affiliation(s)
- Marcella K. Vaicik
- Research Service, Edward Hines Jr. VA Hospital, Hines, Illinois 60141
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois 60616
| | - Alen Blagajcevic
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois 60637
| | - Honggang Ye
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois 60637
| | - Mallory C. Morse
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois 60637
| | - Feipeng Yang
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois 60616
| | - Anna Goddi
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois 60637
| | - Eric M. Brey
- Research Service, Edward Hines Jr. VA Hospital, Hines, Illinois 60141
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois 60616
| | - Ronald N. Cohen
- Section of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Chicago, Chicago, Illinois 60637
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5
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Vieira LFDA, Lins MP, Viana IMMN, dos Santos JE, Smaniotto S, Reis MDDS. Metallic nanoparticles reduce the migration of human fibroblasts in vitro. NANOSCALE RESEARCH LETTERS 2017; 12:200. [PMID: 28314368 PMCID: PMC5355407 DOI: 10.1186/s11671-017-1982-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 03/06/2017] [Indexed: 05/04/2023]
Abstract
Nanoparticles have extremely wide applications in the medical and biological fields. They are being used in biosensors, local drug delivery, diagnostics, and medical therapy. However, the potential effects of nanoparticles on target cell and tissue function, apart from cytotoxicity, are not completely understood. Thus, the aim of this study was to investigate the in vitro effects of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) on human fibroblasts with respect to their interaction with the extracellular matrix and in cell migration. Immunofluorescence analysis revealed that treatment with AgNPs or AuNPs decreased collagen and laminin production at all the concentrations tested (0.1, 1, and 10 μg/mL). Furthermore, cytofluorometric analysis showed that treatment with AgNPs reduced the percentage of cells expressing the collagen receptor very late antigen 2, α2β1 integrin (VLA-2) and the laminin receptor very late antigen 6, α6β1 integrin (VLA-6). In contrast, AuNP treatment increased and decreased the percentages of VLA-2-positive and VLA-6-positive cells, respectively, as compared to the findings for the controls. Analysis of cytoskeletal reorganization showed that treatment with both types of nanoparticles increased the formation of stress fibres and number of cell protrusions and impaired cell polarity. Fibroblasts exposed to different concentrations of AuNPs and AgNPs showed reduced migration through transwell chambers in the functional chemotaxis assay. These results demonstrated that metal nanoparticles may influence fibroblast function by negatively modulating the deposition of extracellular matrix molecules (ECM) and altering the expression of ECM receptors, cytoskeletal reorganization, and cell migration.
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Affiliation(s)
- Larissa Fernanda de Araújo Vieira
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
| | - Marvin Paulo Lins
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
| | - Iana Mayane Mendes Nicácio Viana
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
| | - Jeniffer Estevão dos Santos
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
| | - Salete Smaniotto
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
| | - Maria Danielma dos Santos Reis
- Laboratory of Cell Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, CEP 57072-970 Maceió, Alagoas Brazil
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Targeted Disruption of the Lama3 Gene in Adult Mice Is Sufficient to Induce Skin Inflammation and Fibrosis. J Invest Dermatol 2017; 137:332-340. [DOI: 10.1016/j.jid.2016.07.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/15/2016] [Accepted: 07/26/2016] [Indexed: 02/07/2023]
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Cavalieri S, Rotoli M, Feliciani C, Amerio P. Expression of the High-Affinity Laminin Receptor (67 kDa) in Normal Human Skin and Appendages. Int J Immunopathol Pharmacol 2016; 18:223-31. [PMID: 15888241 DOI: 10.1177/039463200501800205] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The interaction of cells with extracellular matrix components plays a significant role in the regulation of cell biology. Laminin is a large glycoprotein involved in fundamental interactions between cells and the basement membrane. Several cell surface receptors are responsible for cell-matrix interactions. The 67 kDa high affinity laminin receptor, 67LR, is involved in the adhesion of normal cells to the laminin network and is also associated with the metastatic phenotype of some tumoral cells. We have investigated the expression of laminin and of the 67LR in normal human skin using immunoperoxidase staining. Twenty samples of skin were analyzed. Antibody against laminin reacted in a continuous linear band at the dermal-epidermal junction, as well as basement membranes of hair follicles, sebaceous and eccrine sweat glands, and dermal blood vessels. The epidermis and the follicular epithelium were negative for laminin. The 67LR seemed not to be expressed on the basal surface of basal keratinocytes. The major expression of this receptor may be detected in the upper half of the spinous layer and in the granular layer. The cells of the outer root sheath in hair follicle showed the same immunohistochemical pattern described for epidermis. In sebaceous glands and in eccrine sweat glands the secreting epithelium was positive. Endothelial cells of dermal blood vessels were routinely positive for 67LR. We observed that the expression of the 67LR in normal human skin is mostly located in epidermal areas in which the keratinizing process was particularly advanced.
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Affiliation(s)
- S Cavalieri
- Department of Dermatology, Catholic University of the Sacred Heart, Rome, Italy
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Tong X, He S, Chen J, Hu H, Xiang Z, Lu C, Dai F. A novel laminin β gene BmLanB1-w regulates wing-specific cell adhesion in silkworm, Bombyx mori. Sci Rep 2015. [PMID: 26212529 PMCID: PMC4515764 DOI: 10.1038/srep12562] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Laminins are important basement membrane (BM) components with crucial roles in development. The numbers of laminin isoforms in various organisms are determined by the composition of the different α, β, and γ chains, and their coding genes, which are variable across spieces. In insects, only two α, one β, and one γ chains have been identified thus far. Here, we isolated a novel laminin β gene, BmLanB1-w, by positional cloning of the mutant (crayfish, cf) with blistered wings in silkworm. Gene structure analysis showed that a 2 bp deletion of the BmLanB1-w gene in the cf mutant caused a frame-shift in the open reading frame (ORF) and generated a premature stop codon. Knockdown of the BmLanB1-w gene produced individuals exhibiting blistered wings, indicating that this laminin gene was required for cell adhesion during wing development. We also identified laminin homologs in different species and showed that two copies of β laminin likely originated in Lepidoptera during evolution. Furthermore, phylogenetic and gene expression analyses of silkworm laminin genes revealed that the BmLanB1-w gene is newly evolved, and is required for wing-specific cell adhesion. This is the first report showing the tissue specific distribution and functional differentiation of β laminin in insects.
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Affiliation(s)
- Xiaoling Tong
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Songzhen He
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Jun Chen
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Hai Hu
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Zhonghuai Xiang
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Cheng Lu
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
| | - Fangyin Dai
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, 400700, China
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Morris AWJ, Carare RO, Schreiber S, Hawkes CA. The Cerebrovascular Basement Membrane: Role in the Clearance of β-amyloid and Cerebral Amyloid Angiopathy. Front Aging Neurosci 2014; 6:251. [PMID: 25285078 PMCID: PMC4168721 DOI: 10.3389/fnagi.2014.00251] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 09/05/2014] [Indexed: 11/13/2022] Open
Abstract
Cerebral amyloid angiopathy (CAA), the accumulation of β-amyloid (Aβ) peptides in the walls of cerebral blood vessels, is observed in the majority of Alzheimer’s disease (AD) brains and is thought to be due to a failure of the aging brain to clear Aβ. Perivascular drainage of Aβ along cerebrovascular basement membranes (CVBMs) is one of the mechanisms by which Aβ is removed from the brain. CVBMs are specialized sheets of extracellular matrix that provide structural and functional support for cerebral blood vessels. Changes in CVBM composition and structure are observed in the aged and AD brain and may contribute to the development and progression of CAA. This review summarizes the properties of the CVBM, its role in mediating clearance of interstitial fluids and solutes from the brain, and evidence supporting a role for CVBM in the etiology of CAA.
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Affiliation(s)
- Alan W J Morris
- Faculty of Medicine, Clinical and Experimental Sciences, University of Southampton , Southampton , UK
| | - Roxana O Carare
- Faculty of Medicine, Clinical and Experimental Sciences, University of Southampton , Southampton , UK
| | - Stefanie Schreiber
- Department of Neurology, Otto-von-Guericke University , Magdeburg , Germany ; German Center for Neurodegenerative Diseases (DZNE), Helmholtz Association , Magdeburg , Germany
| | - Cheryl A Hawkes
- Faculty of Medicine, Clinical and Experimental Sciences, University of Southampton , Southampton , UK
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Stovbun SV, Gomberg MA, Sergienko VI, Bragina EE, Tverdislov VA. “Microbiological aging” by Mechnikov. How to interpret these ideas today? Biophysics (Nagoya-shi) 2014. [DOI: 10.1134/s0006350914040083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Johnson G, Moore SW. The Leu-Arg-Glu (LRE) adhesion motif in proteins of the neuromuscular junction with special reference to proteins of the carboxylesterase/cholinesterase family. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2013; 8:231-43. [PMID: 23850873 DOI: 10.1016/j.cbd.2013.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 05/30/2013] [Accepted: 06/03/2013] [Indexed: 11/29/2022]
Abstract
Short linear motifs confer evolutionary flexibility on proteins as they can be added with relative ease allowing the acquisition of new functions. Such motifs may mediate a variety of signalling functions. The adhesion-mediating Leu-Arg-Glu (LRE) motif is enriched in laminin beta 2, and has been observed in other proteins, including members of the carboxylesterase/cholinesterase family. It acts as a stop signal for growing axons in the developing neuromuscular junction, binding to the voltage-gated calcium channel. In this bioinformatic analysis, we have investigated the presence of the motif in proteins of the neuromuscular junction, and have also examined its structural position and potential for ligand interaction, as well as phylogenetic conservation, in the carboxylesterase/cholinesterase family. The motif was observed to occur with a significantly higher frequency than expected in the UniProt/Swiss-Prot database, as well as in four individual species (human, mouse, Caenorhabditis elegans and Drosophila melanogaster). Examination of its presence in neuromuscular junction proteins showed it to be enriched in certain proteins of the synaptic basement membrane, including laminin, agrin, acetylcholinesterase and tenascin. A highly significant enrichment was observed in cytoskeletal proteins, particularly intermediate filament proteins and members of the spectrin family. In the carboxylesterase/cholinesterase family, the motif was observed in four conserved positions in the protein structure. It is present in the majority of mammalian acetylcholinesterases, as well as acetylcholinesterases from electric fish and a number of invertebrates. In insects, it is present in the ace-2, rather than in the synaptic ace-1, enzyme. It is also observed in the cholinesterase-like adhesion molecules (neuroligins, neurotactin and glutactin). It is never seen in butyrylcholinesterases, which do not mediate cell adhesion. In conclusion, the significant enrichment of the motif in certain classes of protein, as well as its conserved presence and structural positioning in one protein family, suggests that it has specific functions both in cell adhesion in the neuromuscular junction and in maintaining the structural integrity of the cytoskeleton.
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Affiliation(s)
- Glynis Johnson
- Divisions of Paediatric Surgery/Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University, P.O. Box 19063, Tygerberg 7505, South Africa.
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Pelissier-Rota M, Lainé M, Ducarouge B, Bonaz B, Jacquier-Sarlin M. Role of Cholinergic Receptors in Colorectal Cancer: Potential Therapeutic Implications of Vagus Nerve Stimulation? ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jct.2013.46128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Wilhelm A, Jahns F, Böcker S, Mothes H, Greulich K, Glei M. Culturing explanted colon crypts highly improves viability of primary non-transformed human colon epithelial cells. Toxicol In Vitro 2012; 26:133-41. [DOI: 10.1016/j.tiv.2011.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Revised: 10/07/2011] [Accepted: 10/11/2011] [Indexed: 12/31/2022]
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Perivascular drainage of solutes is impaired in the ageing mouse brain and in the presence of cerebral amyloid angiopathy. Acta Neuropathol 2011; 121:431-43. [PMID: 21259015 DOI: 10.1007/s00401-011-0801-7] [Citation(s) in RCA: 247] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 12/20/2010] [Accepted: 01/15/2011] [Indexed: 01/01/2023]
Abstract
The deposition of amyloid-β (Aβ) peptides in the walls of leptomeningeal and cortical blood vessels as cerebral amyloid angiopathy (CAA) is present in normal ageing and the majority of Alzheimer's disease (AD) brains. The failure of clearance mechanisms to eliminate Aβ from the brain contributes to the development of sporadic CAA and AD. Here, we investigated the effects of CAA and ageing on the pattern of perivascular drainage of solutes in the brains of naïve mice and in the Tg2576 mouse model of AD. We report that drainage of small molecular weight dextran along cerebrovascular basement membranes is impaired in the hippocampal capillaries and arteries of 22-month-old wild-type mice compared to 3- and 7-month-old animals, which was associated with age-dependent changes in capillary density. Age-related alterations in the levels of laminin, fibronectin and perlecan in vascular basement membranes were also noted in wild-type mice. Furthermore, dextran was observed in the walls of veins of Tg2576 mice in the presence of CAA, suggesting that deposition of Aβ in vessel walls disrupts the normal route of elimination of solutes from the brain parenchyma. These data support the hypothesis that perivascular solute drainage from the brain is altered both in the ageing brain and as a consequence of CAA. These findings have implications for the success of therapeutic strategies for the treatment of AD that rely upon the health of the ageing cerebral vasculature.
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Feitosa NM, Richardson R, Bloch W, Hammerschmidt M. Basement membrane diseases in zebrafish. Methods Cell Biol 2011; 105:191-222. [PMID: 21951531 DOI: 10.1016/b978-0-12-381320-6.00008-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Basement membranes (BMs) are a complex, sheet-like network of specialized extracellular matrix that underlies epithelial cells and surrounds muscle cells. They provide adherence between neighboring tissues, permit some flexibility of these adherent structures, and can act as a store for growth factors and as a guide for cell migration. The BM is not just a static structure; its deposition and remodeling are important for many processes including embryonic development, immune response, and wound healing. To date, dysfunction in BM deposition or remodeling has been linked to many human congenital disorders and diseases, affecting many different tissues in the body, including malformations, dystrophies, and cancer. However, many questions remain to be answered on the role BM proteins, and their mutations, play in the pathogenesis of human disease. In recent years, the zebrafish (Danio rerio) has emerged as a powerful animal model for human development and disease. In the first part of this chapter, we provide an overview of described defects caused by BM dysfunction in zebrafish, including development and function of notochord, muscle, central nervous system, skin, cardiovascular system, and kidney. In the second part, we will describe details of methods used to visualize and assess the structure of the BM in zebrafish, and to functionally analyze its different components.
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Byrne AJ, Al-Bader T, Kerrigan D, Hickey S, Laloeuf A, Rawlings AV. Synergistic action of a triple peptide complex on an essential extra-cellular matrix protein exhibits significant anti-aging benefits. J Cosmet Dermatol 2010; 9:108-16. [DOI: 10.1111/j.1473-2165.2010.00494.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Natah SS, Srinivasan S, Pittman Q, Zhao Z, Dunn JF. Effects of acute hypoxia and hyperthermia on the permeability of the blood-brain barrier in adult rats. J Appl Physiol (1985) 2009; 107:1348-56. [PMID: 19644026 DOI: 10.1152/japplphysiol.91484.2008] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Acute mountain sickness (AMS) develops within a few hours after arrival at high altitude and includes headache, anorexia, nausea, vomiting, and malaise. This afflicts 15-25% of the general tourist population at moderate altitudes. High-altitude cerebral edema (HACE) is considered to be the end stage of severe AMS and has been suggested to be a vasogenic edema, raising the possibility that acute hypoxia may increase blood-brain barrier (BBB) permeability. At present, there are no good small-animal models to study this syndrome. We hypothesize 1) that acute hypoxia can damage the BBB and 2) that rat can be used as a model to study hypoxia-induced changes in BBB permeability, especially if hypoxia-induced hypothermia could be minimized with high ambient temperature (HAT). Male Wistar rats were exposed to 1, 2, and 7 days of hypobaric hypoxia (equivalent to 0.5 atm), and changes in the temperature and BBB permeability were studied. The extravasation of endogenous immunoglobulin G, a large molecule, did not increase during room temperature hypoxia but did increase when hypoxia was combined with HAT. Hypoxia caused a significant increase in the leakage of sodium fluorescein (mol wt 376 Da). The expression of endothelial barrier antigen (EBA), a protein associated with the BBB, was reduced to 50% between 24 and 48 h after exposure to hypoxia, and the loss was exacerbated by HAT. The values almost returned to control levels by 7 days, showing adaptation to hypoxia. Hypoxic rats exhibited sodium fluorescein leakage mainly in focal areas in the brain parenchyma. In conclusion, it is possible to have transient BBB damage through exposure to acute hypoxia, and this damage is exacerbated by increasing body temperature to more of a normothermic value.
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Affiliation(s)
- Sirajedin S Natah
- Department of Radiology, University of Calgary, 3330 Hospital Dr., N.W., Calgary, Alberta T2N 4N1, Canada
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McFee RM, Artac RA, McFee RM, Clopton DT, Smith RAL, Rozell TG, Cupp AS. Inhibition of vascular endothelial growth factor receptor signal transduction blocks follicle progression but does not necessarily disrupt vascular development in perinatal rat ovaries. Biol Reprod 2009; 81:966-77. [PMID: 19605787 DOI: 10.1095/biolreprod.109.078071] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
We hypothesized that vascular endothelial growth factor A (VEGFA) angiogenic isoforms and their receptors, FLT1 and KDR, regulate follicular progression in the perinatal rat ovary. Each VEGFA angiogenic isoform has unique functions (based on its exons) that affect diffusibility, cell migration, branching, and development of large vessels. The Vegfa angiogenic isoforms (Vegfa_120, Vegfa_164, and Vegfa_188) were detected in developing rat ovaries, and quantitative RT-PCR determined that Vegfa_120 and Vegfa_164 mRNA was more abundant after birth, while Vegfa_188 mRNA was highest at Embryonic Day 16. VEGFA and its receptors were localized to pregranulosa and granulosa cells of all follicle stages and to theca cells of advanced-stage follicles. To determine the role of VEGFA in developing ovaries, Postnatal Day 3/4 rat ovaries were cultured with 8 muM VEGFR-TKI, a tyrosine kinase inhibitor that blocks FLT1 and KDR. Ovaries treated with VEGFR-TKI had vascular development reduced by 94% (P < 0.0001), with more primordial follicles (stage 0), fewer early primary, transitional, and secondary follicles (stages 1, 3, and 4, respectively), and greater total follicle numbers compared with control ovaries (P < 0.005). V1, an inhibitor specific for KDR, was utilized to determine the effects of only KDR inhibition. Treatment with 30 muM V1 had no effect on vascular density; however, treated ovaries had fewer early primary, transitional, and secondary follicles and more primary follicles (stage 2) compared with control ovaries (P < 0.05). We conclude that VEGFA may be involved in primordial follicle activation and in follicle maturation and survival, which are regulated through vascular-dependent and vascular-independent mechanisms.
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Affiliation(s)
- Renee M McFee
- Department of Animal Science, Kansas State University, Manhattan, Kansas, USA
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20
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De Luca M, Pellegrini G, Mavilio F. Gene therapy of inherited skin adhesion disorders: a critical overview. Br J Dermatol 2009; 161:19-24. [PMID: 19466960 DOI: 10.1111/j.1365-2133.2009.09243.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M De Luca
- Centre for Regenerative Medicine Stefano Ferrari, Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena 41100, Italy.
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21
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Pellegrini G, Rama P, Mavilio F, De Luca M. Epithelial stem cells in corneal regeneration and epidermal gene therapy. J Pathol 2009; 217:217-28. [PMID: 18855878 DOI: 10.1002/path.2441] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Regenerative medicine refers to innovative therapies aimed at the permanent restoration of diseased tissues and organs. Regeneration of self-renewing tissues requires specific adult stem cells, which need to be genetically modified to correct inherited genetic diseases. Cultures of epithelial stem cells permanently restore severe skin and mucosal defects, and genetically corrected epidermal stem cells regenerate a normal epidermis in patients carrying junctional epidermolysis bullosa. The keratinocyte stem cell is therefore the only cultured stem cell used both in cell therapy and gene therapy clinical protocols. Epithelial stem cell identification, fate and molecular phenotype have been extensively reviewed, but not in relation to tissue regeneration. In this paper we focus on the localization and molecular characterization of human limbal stem cells in relation to corneal regeneration, and the gene therapy of genetic skin diseases by means of genetically modified epidermal stem cells.
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Affiliation(s)
- G Pellegrini
- Centre for Regenerative Medicine, Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy
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22
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Graham HK, Horn M, Trafford AW. Extracellular matrix profiles in the progression to heart failure. European Young Physiologists Symposium Keynote Lecture-Bratislava 2007. Acta Physiol (Oxf) 2008; 194:3-21. [PMID: 18577182 DOI: 10.1111/j.1748-1716.2008.01881.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The myocardial extracellular matrix (ECM), which preserves the geometry and integrity of the myocardium, is a dynamic structure whose component proteins are maintained by a finely controlled homeostatic balance between deposition and degradation. One of the key targets in cardiology is the elucidation of the molecular mechanisms which mediate pathological remodelling of this matrix causing the transition from compensatory hypertrophy to congestive decompensated heart failure. In response to injury or increased workload, cardiac remodelling including myocyte hypertrophy, develops as the heart attempts to compensate for increased wall stresses. Persistence of these stresses over extended time periods leads to disruption of ECM homeostasis resulting in irreversible maladaptive cardiac remodelling, ventricular dilatation and finally heart failure. ECM remodelling is regulated by the matrix metalloproteinases (MMPs) and their endogenous inhibitors (TIMPs). Clinical studies and experimental models of cardiac disease states have reported alterations in the balance between the MMPs and TIMPs in the failing heart and crucially at intermediate time points in the progression to failure. This article reviews the recent clinical, genetic and experimental approaches employed to compare ECM, MMP and TIMP profiles in healthy, compensated and failing hearts and identifies common themes in the perturbation of ECM homeostasis in the transition to heart failure.
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Affiliation(s)
- H K Graham
- Unit of Cardiac Physiology, University of Manchester, Manchester, UK.
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23
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MARREN P, DEAN D, CHARNOCK M, WOJNAROWSKA F. The basement membrane zone in lichen sclerosus: an immunohistochemical study. Br J Dermatol 2008. [DOI: 10.1046/j.1365-2133.1997.6061582.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Schneider H, Mühle C, Pacho F. Biological function of laminin-5 and pathogenic impact of its deficiency. Eur J Cell Biol 2007; 86:701-17. [PMID: 17000025 DOI: 10.1016/j.ejcb.2006.07.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Revised: 07/20/2006] [Accepted: 07/20/2006] [Indexed: 01/13/2023] Open
Abstract
The basement membrane glycoprotein laminin-5 is a key component of the anchoring complex connecting keratinocytes to the underlying dermis. It is secreted by keratinocytes as a cross-shaped heterotrimer of alpha3, beta3 and gamma2 chains and serves as a ligand of various transmembrane receptors, thereby regulating keratinocyte adhesion, motility and proliferation. In intact skin, laminin-5 provides essential links to both the hemidesmosomal alpha6beta4 integrin and the collagen type VII molecules which form the anchoring fibrils inserting into the dermis. If the basement membrane is injured, laminin-5 production increases rapidly. It then serves as a scaffold for cell migration, initiates the formation of hemidesmosomes and accelerates basement membrane restoration at the dermal-epidermal junction. Mutations of the laminin-5 genes or auto-antibodies against one of the subunits of laminin-5 may lead to a significant lack of this molecule in the epidermal basement membrane zone. The major contributions of laminin-5 to the resistance of the epidermis against frictional stress but also for basement membrane regeneration and repair of damaged skin are reflected by the phenotype of Herlitz junctional epidermolysis bullosa, which is caused by an inherited absence of functional laminin-5. This lethal disease becomes manifest in widespread blistering of skin and mucous membranes, impaired wound healing and chronic erosions containing exuberant granulation tissue. Here, we discuss current understanding of the biological functions of laminin-5, the pathogenic impact of its deficiency and implications on molecular approaches towards a therapy of junctional epidermolysis bullosa.
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Affiliation(s)
- Holm Schneider
- Department of Experimental Medicine I, Nikolaus Fiebiger Centre of Molecular Medicine, University of Erlangen-Nürnberg, Glückstr. 6, D-91054 Erlangen, Germany; Children's Hospital, University of Erlangen-Nürnberg, Germany.
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25
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Sadler E, Lazarova Z, Sarasombath P, Yancey KB. A widening perspective regarding the relationship between anti-epiligrin cicatricial pemphigoid and cancer. J Dermatol Sci 2007; 47:1-7. [PMID: 17467241 DOI: 10.1016/j.jdermsci.2007.02.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Revised: 02/26/2007] [Accepted: 02/27/2007] [Indexed: 01/13/2023]
Abstract
Anti-epiligrin cicatricial pemphigoid (AECP) is a chronic, autoimmune, subepidermal blistering disease characterized by circulating anti-basement membrane autoantibodies to laminin 5. Recent studies have shown that patients with this form of cicatricial pemphigoid have an increased relative risk for malignant solid tumors. The mechanism underlying this association of AECP and cancer is unknown, but there is accumulating evidence that laminin 5 plays a central role. In this article we report a patient with AECP and co-associated cutaneous T cell lymphoma and summarize all to date reported cases of AECP associated with malignancies. In addition we provide a review of the biology of laminin 5 and its potential role in cancer development.
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Affiliation(s)
- Elke Sadler
- Department of Dermatology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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Zweers MC, Davidson JM, Pozzi A, Hallinger R, Janz K, Quondamatteo F, Leutgeb B, Krieg T, Eckes B. Integrin α2β1 Is Required for Regulation of Murine Wound Angiogenesis but Is Dispensable for Reepithelialization. J Invest Dermatol 2007; 127:467-78. [PMID: 16977325 DOI: 10.1038/sj.jid.5700546] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The alpha2beta1 integrin functions as the major receptor for collagen type I on a large number of different cell types, including keratinocytes, fibroblasts, endothelial cells, and a variety of inflammatory cells. Recently, we demonstrated that adhesion of keratinocytes to collagen critically depends on alpha2beta1, whereas fibroblasts can partly compensate for loss of alpha2beta1 in simple adhesion to collagen. However, in three-dimensional collagen matrices, alpha2beta1-null fibroblasts are hampered in generating mechanical forces. These data suggested a pivotal role for alpha2beta1 during wound healing in vivo. Unexpectedly, reepithelialization of excisional wounds of alpha2beta1-null mice was not impaired, indicating that keratinocytes do not require adhesion to or migration on collagen for wound closure. Whereas wound contraction and myofibroblast differentiation were similar, wound tensile strain was reduced in alpha2beta1-null mice, suggesting subtle changes in organization of the extracellular matrix. In addition, we observed reduced influx of mast cells into the granulation tissue, whereas infiltration of other inflammatory cells was not impaired. Interestingly, ablation of alpha2beta1 resulted in strong enhancement of neovascularization of granulation tissue and sponge implants. Both ultrastructurally and functionally, these new blood vessels appeared intact. In conclusion, our data show unique and overlapping functions of alpha2beta1 integrin during murine cutaneous wound healing.
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Affiliation(s)
- Manon C Zweers
- Department of Dermatology, University of Cologne, Cologne, Germany.
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de O Ferreira E, Araújo Lobo L, Barreiros Petrópolis D, dos S Avelar KE, Ferreira MC, e Silva Filho FC, Domingues RMCP. A Bacteroides fragilis surface glycoprotein mediates the interaction between the bacterium and the extracellular matrix component laminin-1. Res Microbiol 2006; 157:960-6. [PMID: 17125972 DOI: 10.1016/j.resmic.2006.09.005] [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: 11/29/2005] [Revised: 08/17/2006] [Accepted: 09/14/2006] [Indexed: 11/28/2022]
Abstract
The adherence of Bacteroides fragilis strains to immobilized laminin-1 (LMN-1) was investigated using this protein adsorbed onto glass. Among the 27 strains isolated from infectious processes and assayed, 13 presented strong adherence to LMN-1. Among them, two strains, MC2 and 1081, showed the strongest association, and for that reason they were selected for further studies in which adherence to this protein was confronted with both physical-chemical and enzymatic treatments, along with concurrence assays with the LMN-1 molecule itself and the LMN-1-residing amino acid sequences (RGD, IKVAV, YIGSR, AG73, A13 and C16). The chemical and enzymatic treatments resulted in sharp decreases in binding rates of those strains, and competition experiments with LMN-1- residing amino acids revealed that, except for RGD and A13, all the others were effective at reducing bacterial binding of the bacteria. The outer membrane proteins (OMPs) of B. fragilis were extracted and assayed onto dot-blotted LMN-1, and when the extracts were chemically treated, especially with metasodium periodate, a drastic reduction in bacterial binding occurred. Results of the latter assays clearly indicate that bacterial molecules involved in both recognition and binding of B. fragilis to LMN-1 are present in OMP extracts. Taken together, our results strongly indicate that a B. fragilis surface glycoprotein may play a key role in bacterial association with LMN-1.
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Affiliation(s)
- Eliane de O Ferreira
- Departamento de Microbiologia Médica, UFRJ, Instituto de Microbiologia Prof Paulo de Góes, Ilha do Fundão, CEP 21941-590, Rio de Janeiro, Brazil.
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28
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Bott RC, McFee RM, Clopton DT, Toombs C, Cupp AS. Vascular endothelial growth factor and kinase domain region receptor are involved in both seminiferous cord formation and vascular development during testis morphogenesis in the rat. Biol Reprod 2006; 75:56-67. [PMID: 16672722 PMCID: PMC2366204 DOI: 10.1095/biolreprod.105.047225] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Morphological male sex determination is dependent on migration of endothelial and preperitubular cells from the adjacent mesonephros into the developing testis. Our hypothesis is that VEGFA and its receptor KDR are necessary for both testicular cord formation and neovascularization. The Vegfa gene has 8 exons with many splice variants. Vegfa120, Vegfa164, and Vegfa188 mRNA isoforms were detected on Embryonic Day (E) 13.5 (plug date=E0) in the rat. Vegfa120, Vegfa144, Vegfa164, Vegfa188, and Vegfa205 mRNA were detected at E18 and Postnatal Day 3 (P3). Kdr mRNA was present on E13.5, whereas Fms-like tyrosine kinase 1 receptor (Flt1) mRNA was not detected until E18. VEGFA protein was localized to Sertoli cells at cord formation and KDR to germ and interstitial cells. The VEGFA signaling inhibitors SU1498 (40 microM) and VEGFR-TKI (8 microM) inhibited cord formation in E13 testis cultures with 90% reduced vascular density (P<0.01) in VEGFR-TKI-treated organs. Furthermore, Je-11 (10 microM), an antagonist to VEGFA, also perturbed cord formation and inhibited vascular density by more than 50% (P<0.01). To determine signal transduction pathways involved in VEGFA's regulation of testis morphogenesis, E13 testis were treated with LY 294002 (15 microM), a phosphoinositide 3-kinase (PI3K) pathway inhibitor, resulting in inhibition of both vascular density (46%) and cord formation. Thus, we support our hypothesis and conclude that VEGFA, secreted by the Sertoli cell, is involved in both neovascularization and cord formation and potentially acts through the PI3K pathway during testis morphogenesis to elicit its effects.
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Affiliation(s)
- Rebecca C Bott
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, Nebraska 68583-0908, USA
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29
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Wang JHC, Thampatty BP. An introductory review of cell mechanobiology. Biomech Model Mechanobiol 2006; 5:1-16. [PMID: 16489478 DOI: 10.1007/s10237-005-0012-z] [Citation(s) in RCA: 349] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2005] [Accepted: 12/08/2005] [Indexed: 11/30/2022]
Abstract
Mechanical loads induce changes in the structure, composition, and function of living tissues. Cells in tissues are responsible for these changes, which cause physiological or pathological alterations in the extracellular matrix (ECM). This article provides an introductory review of the mechanobiology of load-sensitive cells in vivo, which include fibroblasts, chondrocytes, osteoblasts, endothelial cells, and smooth muscle cells. Many studies have shown that mechanical loads affect diverse cellular functions, such as cell proliferation, ECM gene and protein expression, and the production of soluble factors. Major cellular components involved in the mechanotransduction mechanisms include the cytoskeleton, integrins, G proteins, receptor tyrosine kinases, mitogen-activated protein kinases, and stretch-activated ion channels. Future research in the area of cell mechanobiology will require novel experimental and theoretical methodologies to determine the type and magnitude of the forces experienced at the cellular and sub-cellular levels and to identify the force sensors/receptors that initiate the cascade of cellular and molecular events.
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Affiliation(s)
- J H-C Wang
- MechanoBiology Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh, 210 Lothrop St. BST, E1640, Pittsburgh, PA 15213, USA.
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30
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Wang J, Hoshijima M, Lam J, Zhou Z, Jokiel A, Dalton ND, Hultenby K, Ruiz-Lozano P, Ross J, Tryggvason K, Chien KR. Cardiomyopathy Associated with Microcirculation Dysfunction in Laminin α4 Chain-deficient Mice. J Biol Chem 2006; 281:213-20. [PMID: 16204254 DOI: 10.1074/jbc.m505061200] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Laminin alpha4 chain is a component of extracellular matrix (ECM) laminin-8 and -9 and serves dual roles as a structure protein and as a signaling molecule. The abundance of laminin alpha4 chain transcripts in the heart suggests an important role of this protein in cardiovascular development and function. In this study, we demonstrate that laminin alpha4 deficient mice gradually develop cardiac hypertrophy with impaired function. We show that depletion of laminin alpha4 chain did not alter the levels of dystrophin-glycoprotein complex (DGC) components or affect cell membrane integrity. No alteration in integrin beta 1D protein was observed in terms of expression level or distribution pattern, indicating that the postnatal development of cardiac hypertrophy and cardiomyopathy in these mice is unlikely associated with the stability of sarcolemmal DGC and integrin complexes. Moreover, cardiomyocytes isolated from Lama4-/- mutant hearts maintained their contractility in vitro. In contrast, elevated levels of hypoxia-inducible factor 1alpha (Hif1alpha) and vascular endothelial growth factor A (Vegfa) transcripts, along with multiple foci of cardiomyocyte degeneration and fibrosis suggested sustained cardiac ischemia. Electron microscopy confirmed malformed blood vessels and wide pericapillary ECM spaces, suggesting the presence of microcirculation abnormalities in Lama4-/- mutant hearts. We thus conclude that mutation in the laminin alpha4 chain leads to abnormal cardiovascular ECM structure that cause insufficient oxygen supply to the heart and the subsequent ischemic cardiac phenotype observed. Our study links the genetic deficiency of an ECM protein to cardiomyopathy and implies a novel pathway of idiopathic cardiomyopathy in human.
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MESH Headings
- Animals
- Arrhythmias, Cardiac/metabolism
- Arrhythmias, Cardiac/pathology
- Arrhythmias, Cardiac/physiopathology
- Cardiomegaly/metabolism
- Cardiomegaly/pathology
- Cardiomegaly/physiopathology
- Cardiomyopathies/metabolism
- Cardiomyopathies/pathology
- Cardiomyopathies/physiopathology
- Coronary Circulation
- Dystrophin/metabolism
- Extracellular Matrix/metabolism
- Extracellular Matrix/pathology
- Gene Expression
- Glycoproteins/metabolism
- Hypoxia/metabolism
- Hypoxia/pathology
- Hypoxia/physiopathology
- Integrin beta1/metabolism
- Laminin/genetics
- Laminin/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Microcirculation
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/physiology
- Sarcolemma/metabolism
- Up-Regulation/physiology
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/pathology
- Ventricular Dysfunction, Left/physiopathology
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Affiliation(s)
- Jianming Wang
- Institute of Molecular Medicine, University of California at San Diego, La Jolla 92093, USA
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31
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Chartier NT, Lainé M, Gout S, Pawlak G, Marie CA, Matos P, Block MR, Jacquier-Sarlin MR. Laminin-5-integrin interaction signals through PI 3-kinase and Rac1b to promote assembly of adherens junctions in HT-29 cells. J Cell Sci 2006; 119:31-46. [PMID: 16339173 DOI: 10.1242/jcs.02698] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Human intestinal cell differentiation is mediated by signaling pathways that remain largely undefined. We and others have shown that cell migration and differentiation along the crypt-villus axis is associated with temporal and spatial modulations of the repertoire, as well as with the function of integrins and E-cadherins and their substrates. Cross-talk between integrin and cadherin signaling was previously described and seems to coordinate this differentiation process. Here, we report that engagement of alpha6 and, to a lesser extent, alpha3 integrin subunits after HT-29 cell adhesion on laminin 5 increases the expression of E-cadherin, which then organizes into nascent adherens junctions. We further identify that phosphoinositide 3-kinase (PI 3-kinase) activation plays a key role in this cross-talk. Indeed, integrin-dependent adhesion on laminin 5 stimulates PI 3-kinase activity. Immunofluorescence and immunoprecipitation experiments revealed that activated PI 3-kinase is recruited at cell-cell contacts. Using LY294002, an inhibitor of PI 3-kinase activity, we found that this activation is essential for E-cadherin connection with the cytoskeleton and for biogenesis of adherens junctions. Finally, we demonstrated that PI 3-kinase could signal through Rac1b activation to control adherens junction assembly. Our results provide a mechanistic insight into integrin-cadherin cross-talk and identify a novel role for PI 3-kinase in the establishment of adherens junctions.
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Affiliation(s)
- Nicolas T Chartier
- Laboratoire d'Etude de la Différenciation et de l'Adhérence Cellulaires, UMR UJF/CNRS 5538, Institut Albert Bonniot, Faculté de Médecine de Grenoble, Domaine de la Merci, 38706 La Tronche Cedex, France
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32
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Abstract
The epidermal basement membrane is a specialized structure localized between the epidermis and the dermis. Recent studies have elucidated the biological roles of the basement membrane and its pathophysiological involvement in bullous diseases. To understand the functions of the basement membrane, it is essential to have clear and precise information regarding the ultrastructural molecular organization of the epidermal basement membrane. Immunoelectron microscopy is a powerful technique and the only method available for the clarification of the ultrastructural localization or orientation of molecules. This review summarizes the latest information regarding the molecular organization of the epidermal basement membrane as determined by immunoelectron microscopy as well as the blistering diseases that occur in the epidermal basement membrane zone.
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Affiliation(s)
- Takuji Masunaga
- Fundamental Research Laboratories, KOSE Corporation, Tokyo, Japan.
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33
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Abstract
During the second half of the 20th century, blood bankers quickly expanded our knowledge of human erythrocyte blood group antigens. By the dawn of the 21st century, several hundred blood group antigen polymorphisms had been identified. Hot on the heels of the serologists, membrane biochemists and molecular geneticists defined both the biochemical and genetic bases of most of these antigens. Perhaps to their surprise, this work has led to the discovery of functionally diverse and important membrane proteins expressed on the surface of red cells, including numerous adhesion molecules. Red cells express an unexpected number of such adhesion receptors, some of which contribute to human disease, as well as to normal red cell development. And perhaps most interestingly, study of these molecules has elucidated ways in which even mature red cells respond to external stimuli, such as adrenergic hormones.
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Affiliation(s)
- Marilyn J Telen
- Duke University Medical Canter, Duke-UNC Comprehensive Sickle Cell Center, Durham, NC 27710, USA.
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34
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Trachana V, Christophorides E, Kouzi-Koliakos K, Koliakos G. Laminin-1 is phosphorylated by ecto-protein kinases of monocytes. Int J Biochem Cell Biol 2005; 37:478-92. [PMID: 15474991 DOI: 10.1016/j.biocel.2004.08.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2004] [Revised: 07/18/2004] [Accepted: 08/04/2004] [Indexed: 12/16/2022]
Abstract
Monocytes encounter basement membranes and interact with laminins while crossing the vascular barrier. It is known that these cells possess ecto-protein kinase activity on their surface. Several proteins of the extracellular matrix can be phosphorylated by ectokinases. Therefore, it has been hypothesized that monocyte ectokinases could phosphorylate laminins and influence their biological properties. In order to test the above hypothesis, we used intact human monocytes and adenosine triphosphate labeled with radioactive phosphate at the third phosphate ([gamma-32P]-ATP) to phosphorylate laminin-1. Autoradiography after sodium dodecyl sulphate polyacrylamyde gel electrophoresis (SDS-PAGE) electrophoresis indicated phosphorylation of laminin-1 on the beta and/or gamma chains. After phosphorylation, phosphoserine could be detected on Western blots by a specific monoclonal antibody. Phosphorylation was not detected when monocytes were pre-treated with trypsin and was inhibited by a specific ecto-protein kinase inhibitor (K252b). Laminin phosphorylation was also inhibited by heparin, a known inhibitor of casein kinase II and by pretreatment of monocytes by a monoclonal anti-casein kinase II antibody. Heparin binding, cell attachment and proliferation, and monocyte migration were enhanced on the phosphorylated laminin-1 as compared to the non-phosphorylated controls. These data indicate that laminin-1 can be phosphorylated by monocyte casein kinase II type ectokinase. This phosphorylation influences important functions of laminin and therefore could provide an additional means for the interaction of monocytes with basement membranes.
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Affiliation(s)
- Varvara Trachana
- Department of Biological Chemistry, Medical School, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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35
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Contacts of Basement Membrane Molecules with Cell Membranes. CURRENT TOPICS IN MEMBRANES 2005. [DOI: 10.1016/s1063-5823(05)56010-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Functions of Basement Membranes. CURRENT TOPICS IN MEMBRANES 2005. [DOI: 10.1016/s1063-5823(05)56004-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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37
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Paraoanu LE, Layer PG. Mouse acetylcholinesterase interacts in yeast with the extracellular matrix component laminin-1β. FEBS Lett 2004; 576:161-4. [PMID: 15474030 DOI: 10.1016/j.febslet.2004.08.078] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2004] [Accepted: 08/09/2004] [Indexed: 11/26/2022]
Abstract
Acetylcholinesterase (AChE) is likely to have roles other than the hydrolysis of acetylcholine, e.g., related to developmental processes like neurite outgrowth, differentiation and adhesion. Here, we investigated whether AChE can function as a heterophilic cell adhesion molecule and searched for proteins interacting with it. Using the yeast two-hybrid method and a mouse brain cDNA library, we have identified an interaction between a partial cDNA encoding the globular domain IV of laminin chain beta1 and the amino acids 240-503 of mouse AChE. Biochemical co-immunoprecipitation assays confirmed the genetic results. We suggest that AChE, by interacting with laminin-1, is able to exert changes in adhesion signaling pathways.
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Affiliation(s)
- Laura E Paraoanu
- Technical University Darmstadt, Institute of Zoology, Department of Developmental Biology and Neurogenetics, Schnittspahnstr. 3, 64287 Darmstadt, Germany
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38
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Badylak SF. Extracellular matrix as a scaffold for tissue engineering in veterinary medicine: Applications to soft tissue healing. ACTA ACUST UNITED AC 2004. [DOI: 10.1053/j.ctep.2004.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Li YQ, Chen P, Jain V, Reilly RM, Wong CS. Early Radiation-Induced Endothelial Cell Loss and Blood–Spinal Cord Barrier Breakdown in the Rat Spinal Cord. Radiat Res 2004; 161:143-52. [PMID: 14731076 DOI: 10.1667/rr3117] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Using a rat spinal cord model, this study was designed to characterize radiation-induced vascular endothelial cell loss and its relationship to early blood-brain barrier disruption in the central nervous system. Adult rats were given a single dose of 0, 2, 8, 19.5, 22, 30 or 50 Gy to the cervical spinal cord. At various times up to 2 weeks after irradiation, the spinal cord was processed for histological and immunohistochemical analysis. Radiation-induced apoptosis was assessed by morphology and TdT-mediated dUTP nick end labeling combined with immunohistochemical markers for endothelial and glial cells. Image analysis was performed to determine endothelial cell and microvessel density using immunohistochemistry with endothelial markers, namely endothelial barrier antigen, glucose transporter isoform 1, laminin and zonula occludens 1. Blood-spinal cord barrier permeability was assessed using immunohistochemistry for albumin and (99m)Tc-diethylenetriamine pentaacetic acid as a vascular tracer. Endothelial cell proliferation was assessed using in vivo BrdU labeling. During the first 24 h after irradiation, apoptotic endothelial cells were observed in the rat spinal cord. The decrease in endothelial cell density at 24 h after irradiation was associated with an increase in albumin immunostaining around microvessels. The decrease in the number of endothelial cells persisted for 7 days and recovery of endothelial density was apparent by day 14. A similar pattern of blood-spinal cord barrier disruption and recovery of permeability was observed over the 2 weeks, and an increase in BrdU-labeled endothelial cells was seen at day 3. These results are consistent with an association between endothelial cell death and acute blood-spinal cord barrier disruption in the rat spinal cord after irradiation.
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Affiliation(s)
- Yu-Qing Li
- Department of Radiation Oncology, Sunnybrook and Women's College Health Sciences Center, University of Toronto, Toronto, Ontario M4N 3M5, Canada
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40
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Kuchenbauer F, Theodoropoulou M, Hopfner U, Stalla J, Renner U, Tonn JC, Low MJ, Arzt E, Stalla GK, Páez-Pereda M. Laminin inhibits lactotroph proliferation and is reduced in early prolactinoma development. Mol Cell Endocrinol 2003; 207:13-20. [PMID: 12972179 DOI: 10.1016/s0303-7207(03)00237-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Laminin is a component of the extracellular matrix (ECM) that regulates cell proliferation and hormone secretion. Here we describe the effects of laminin on prolactin secretion in normal and tumor cells and analyze laminin expression pattern during prolactinoma development. Prolactin secretion and cell proliferation were inhibited by laminin in GH3 cells. In contrast, no effect was observed in normal pituitary cells. Laminin showed a dynamic expression pattern during prolactinoma development, which was: (a) strong in normal pituitaries from wild type or dopamine D2 receptor deficient mice, (b) lower in pituitary hyperplasia and (c) markedly reduced in prolactinomas from D2R -/- mice. A similar gradual decrease in laminin was found by comparing normal human pituitaries, human pituitary hyperplasia and human prolactinomas. These results show dynamic changes of laminin expression during prolactinoma formation which, due to laminin action on PRL production and cell proliferation, indicate a possible role for laminin in prolactinoma development.
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Affiliation(s)
- F Kuchenbauer
- Max Planck Institute of Psychiatry, Neurosignaling Section, Kraepelinstr. 10, 80804, Munich, Germany
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41
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Burchardt ER, Hein R, Bosserhoff AK. Laminin, hyaluronan, tenascin-C and type VI collagen levels in sera from patients with malignant melanoma. Clin Exp Dermatol 2003; 28:515-20. [PMID: 12950343 DOI: 10.1046/j.1365-2230.2003.01326.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this study, hyaluronan, laminin-1, tenascin-C and type VI collagen were measured in the sera of patients with stage I/II and stage IV melanoma. A significant increase in the serum levels of all four extracellular matrix proteins was found in patients with stage IV melanoma compared to healthy donors. Type VI collagen and hyaluronan serum levels were also significantly increased in stage I/II melanoma. Increased expression of the four matrix proteins was also demonstrated in melanoma cell lines using reverse transcriptase- polmerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA). We suggest that tenascin-C, hyaluronan, laminin-1 and type VI collagen are involved in melanoma development and extracellular matrix remodelling during melanoma progression. This finding will be of interest in the development of serum markers for progression of malignant melanoma.
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Affiliation(s)
- E R Burchardt
- fibroSys, Wuppertal, and Institute of Clinical Pharmacology, University of Witten-Herdecke, Witten-Herdecke, Germany
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42
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Copin JC, Gasche Y. [Morphology and physiology of the blood-brain barrier]. ANNALES FRANCAISES D'ANESTHESIE ET DE REANIMATION 2003; 22:202-14. [PMID: 12747988 DOI: 10.1016/s0750-7658(03)00040-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The blood-brain barrier (BBB) is a complex biological system that consists of endothelial cells, pericytes and astrocytes, which are involved in the induction and maintenance of its physiological and ultrastructural characteristics. The BBB plays a primordial role in isolating the cerebral parenchyma as well as in controlling brain homeostasis by its selective permeability to nutriments and other molecules flowing through the cerebral microcapillaries. A better knowledge of this system is crucial in order to improve the efficiency of brain penetration by drugs, and in order to prevent BBB opening, leading to brain edema, in physiopathological situations such as brain ischemia, trauma or inflammatory processes.
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Affiliation(s)
- J C Copin
- Divisions des soins intensifs de chirurgie et de médecine, division d'investigations anesthésiologiques, hôpitaux universitaires de Genève, 1211 Genève, Suisse.
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43
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Kariya Y, Tsubota Y, Hirosaki T, Mizushima H, Puzon-McLaughlin W, Takada Y, Miyazaki K. Differential regulation of cellular adhesion and migration by recombinant laminin-5 forms with partial deletion or mutation within the G3 domain of alpha3 chain. J Cell Biochem 2003; 88:506-20. [PMID: 12532327 DOI: 10.1002/jcb.10350] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The basement membrane protein laminin-5 promotes cell adhesion and migration. The carboxyl-terminal G3 domain in the alpha3 chain is essential for the unique activity of laminin-5. To investigate the function of the G3 domain, we prepared various recombinant laminin-5 forms with a partially deleted or mutated G3 domain. The deletion of the carboxyl-terminal 28 amino acids (region III) markedly decreased the cell adhesion activity with a slight loss of the cell motility activity toward BRL and EJ-1 cells. This change was attributed to the loss of Lys-Arg-Asp sequence. Further deletion of 83 amino acids (region II) led to almost complete loss of the cell motility activity. All charged amino acid residues tested in this region were not responsible for the activity loss. These results suggest that the G3 domain contains two distinct regions that differently regulate cell adhesion and migration. Analysis of laminin-5 receptors showed that integrins alpha3beta1, alpha6beta1, and alpha6beta4 had different but synergistic effects on cell adhesion and migration on laminin-5. However, the structural change of the G3 domain appeared not to change integrin specificity. The present study demonstrates that the G3 domain in laminin-5 plays a central role to produce different biological effects on cells.
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Affiliation(s)
- Yoshinobu Kariya
- Division of Cell Biology, Kihara Institute for Biological Research, Yokohama City University, 641-12 Maioka-cho, Totsuka-ku, Japan
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Abstract
O estudo das alterações moleculares das epidermólises bolhosas tem contribuído para que se compreenda melhor essas enfermidades. Na epidermólise bolhosa simples a maioria dos casos está associada com alteração nas citoqueratinas basais 5 (gen KRT5) e 14 (gen KRT14), o que modifica o citoesqueleto na camada basal da epiderme, levando à degeneração dessa camada, formando bolha intra-epidérmica. Mutações na plectina (gen PLEC1), componente da placa interna do hemidesmossoma, levam também à clivagem intra-epidérmica. Na epidermólise bolhosa juncional vários gens estão envolvidos, em decorrência da complexidade da zona da membrana basal, todos levando ao descolamento dos queratinócitos basais na lâmina lúcida, pela disfunção da aderência entre esses e a lâmina densa. Alterações na laminina 5 (gens LAMA3, LAMB3 e LAMC2), integrina alfa6beta4 (gens ITGA6 e ITGB4) e colágeno XVII (gen COL17A1) foram descritas. Por fim, na epidermólise bolhosa distrófica apenas um gen está mutado, alterando o colágeno VII (gen COL7A1), principal componente das fibrilas ancorantes, produzindo clivagem abaixo da lâmina densa, variando fenotipicamente de acordo com a conseqüência da mutação. Outra aplicação importante dessas informações refere-se ao diagnóstico pré-natal, com a perspectiva no futuro da terapia gênica.
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45
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Nakano A, Lestringant GG, Paperna T, Bergman R, Gershoni R, Frossard P, Kanaan M, Meneguzzi G, Richard G, Pfendner E, Uitto J, Pulkkinen L, Sprecher E. Junctional epidermolysis bullosa in the Middle East: clinical and genetic studies in a series of consanguineous families. J Am Acad Dermatol 2002; 46:510-6. [PMID: 11907499 DOI: 10.1067/mjd.2002.119673] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Junctional epidermolysis bullosa (JEB) is a group of inherited blistering diseases characterized by epidermal-dermal separation resulting from mutations that affect the function of critical components of the basement membrane zone. This group of autosomal recessive diseases is especially prevalent in regions where consanguinity is common, such as the Middle East. However, the clinical and genetic epidemiology of JEB in this region remains largely unexplored. OBJECTIVE The aim of the present study was to assess a series of consanguineous JEB families originating from the Middle East. METHODS We identified 7 families referred to us between 1998 and 1999 and originating from the United Arab Emirates, Saudi Arabia, Sudan, Yemen, and Israel. Histologic, immunofluorescence, and electron microscopy studies were performed to direct the subsequent molecular analysis. DNA obtained from all family members was amplified by means of polymerase chain reaction and analyzed by conformation-sensitive gel electrophoresis with subsequent direct sequencing. RESULTS In 6 families presenting with the clinical and histologic features distinctive for JEB, mutations in genes encoding 1 of the 3 subunit polypeptides of laminin-5 were identified. Two families each had mutations in LAMB3, 2 in LAMA3, and 2 in LAMC2. Out of 7 distinct mutations, 5 were novel and 2 were recurrent. No relationship was found between the presence of nonsense/frameshift mutations in laminin-5 genes and perinatal mortality, contradicting a major genotype-phenotype correlation previously reported in the European and US literature. Similarly, none of the recurrent LAMB3 hot spot mutations previously described in other populations was found in our series. Finally, in a family with the clinical diagnosis of generalized atrophic benign epidermolysis bullosa, a homozygous non-sense mutation in Col17A1 gene (encoding the BPAG2 antigen) was identified. CONCLUSION The present report suggests (1) the existence of a unique spectrum of mutations in the Middle East populations and (2) the need for the implementation of a diagnostic strategy tailored to the genetic features of JEB in this region.
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Affiliation(s)
- Aoi Nakano
- Department of Dermatology and Cutaneous Biology, Jefferson Medical College and Institute of Molecular Medicine, Thomas Jefferson University, Philadelphia, PA, USA
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46
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Vaccaro M, Magaudda L, Cutroneo G, Trimarchi F, Barbuzza O, Guarneri F, Guarneri B. Changes in the distribution of laminin alpha1 chain in psoriatic skin: immunohistochemical study using confocal laser scanning microscopy. Br J Dermatol 2002; 146:392-8. [PMID: 11952538 DOI: 10.1046/j.1365-2133.2002.04637.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Recent studies have demonstrated the presence in psoriatic skin of ultrastructural and molecular alterations in the basement membrane and an altered polarized distribution of the integrins. Previous studies have demonstrated the existence of some epithelial cell lines synthesizing only laminin beta and gamma chains that, in the absence of the laminin alpha chain, do not form a distinct basal lamina. OBJECTIVES To investigate a possible reduction/absence of the laminin alpha 1 chain in keratinocytes in psoriatic skin and to correlate this with fibronectin distribution. METHODS Using monoclonal antibodies against the laminin alpha1 chain or human plasma fibronectin and using confocal laser scanning microscopy, we evaluated the immunohistochemical expression of these two proteins in cutaneous biopsies from involved and uninvolved skin of the sacral region of 12 men with extensive chronic plaque psoriasis. Site-matched biopsies of normal skin from four men without psoriasis were used as controls. RESULTS In normal skin antilaminin alpha 1 chain antibodies stained the dermal-epidermal junction in a regular and continuous manner. In involved and uninvolved psoriatic skin large regions of discontinuous immunostaining were observed, mainly at the apex of the dermal papillae; in the same regions, clusters of keratinocytes appeared markedly reactive and fibronectin was overexpressed in the papillary dermis under the interruptions of the basement membrane. CONCLUSIONS The present study defines the location of the laminin alpha1 chain in involved and uninvolved psoriatic skin and suggests a possible role of the alteration of this chain, together with T-cell lymphokines and fibronectin, in the dysregulation of cell morphological processes.
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Affiliation(s)
- M Vaccaro
- Institute of Dermatology and Department of Biomorphology, University of Messina, Policlinico Universitario, Via Consolare Valeria Gazzi, 98125 Messina, Italy.
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47
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Dellambra E, Prislei S, Salvati AL, Madeddu ML, Golisano O, Siviero E, Bondanza S, Cicuzza S, Orecchia A, Giancotti FG, Zambruno G, De Luca M. Gene correction of integrin beta4-dependent pyloric atresia-junctional epidermolysis bullosa keratinocytes establishes a role for beta4 tyrosines 1422 and 1440 in hemidesmosome assembly. J Biol Chem 2001; 276:41336-42. [PMID: 11522777 DOI: 10.1074/jbc.m103139200] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The cytoplasmic domain of beta4 integrin contains two pairs of fibronectin-like repeats separated by a connecting segment. The connecting segment harbors a putative tyrosine activation motif in which tyrosines 1422 and 1440 are phosphorylated in response to alpha6beta4 binding to laminin-5. Primary beta4-null keratinocytes, obtained from a newborn suffering from lethal junctional epidermolysis bullosa, were stably transduced with retroviruses carrying a full-length beta4 cDNA or a beta4 cDNA with phenylalanine substitutions at Tyr-1422 and Tyr-1440. Hemidesmosome assembly was evaluated on organotypic skin cultures. beta4-corrected keratinocytes were indistinguishable from normal cells in terms of alpha6beta4 expression, the localization of hemidesmosome components, and hemidesmosome structure and density, suggesting full genetic and functional correction of beta4-null keratinocytes. In cultures generated from beta4(Y1422F/Y1440F) keratinocytes, beta4 mutants as well as alpha6 integrin, HD1/plectin, and BP180 were not concentrated at the dermal-epidermal junction. Furthermore, the number of hemidesmosomes was strikingly reduced as compared with beta4-corrected keratinocytes. The rare hemidesmosomes detected in beta4(Y1422F/Y1440F) cells were devoid of sub-basal dense plates and of inner cytoplasmic plaques with keratin filament insertion. Collectively, our data demonstrate that the beta4 tyrosine activation motif is not required for the localization of alpha6beta4 at the keratinocyte plasma membrane but is essential for optimal assembly of bona fide hemidesmosomes.
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Affiliation(s)
- E Dellambra
- Laboratory of Tissue Engineering, Istituto Dermopatico dell'Immacolata, 00167 Rome, Italy
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48
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Lazarova Z, Yee C, Lazar J, Yancey KB. IgG autoantibodies in patients with anti-epiligrin cicatricial pemphigoid recognize the G domain of the laminin 5 alpha-subunit. Clin Immunol 2001; 101:100-5. [PMID: 11580232 DOI: 10.1006/clim.2001.5091] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Anti-epiligrin cicatricial pemphigoid (AECP) is a mucosal-predominant, subepithelial blistering disease characterized by IgG anti-basement membrane autoantibodies to laminin 5 (alpha3beta3gamma2). This and prior studies found that autoantibodies from most patients recognize the alpha-subunit of this laminin isoform. Accordingly, sera from 10 representative patients were tested against prokaryotic recombinants of this polypeptide in epitope mapping studies. cDNAs spanning the full length of the alpha-subunit were generated by PCR, directionally cloned into the pGEX-4T-3 vector, and expressed as glutathione-S-transferase fusion proteins of appropriate size and immunoreactivity. Sera from 9 of 10 AECP patients immunoblotted fusion proteins corresponding to subdomains G2, G3, G4, and G5 at the carboxyl terminus of the laminin 5 alpha-subunit. Serum from 1 patient (and that from normal volunteers) showed no reactivity to any fusion proteins; no sera bound recombinant glutathione-S-transferase alone. Immunoadsorption of patient sera with fusion proteins corresponding to the G domain substantially reduced basement membrane autoantibody titers. IgG from patients with this form of cicatricial pemphigoid recognize the portion of laminin 5 thought to play a key role in promoting keratinocyte adhesion to epidermal basement membrane.
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Affiliation(s)
- Z Lazarova
- Dermatology Branch, National Cancer Institute, Bethesda, Maryland 20892-1908, USA
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Gout SP, Jacquier-Sarlin MR, Rouard-Talbot L, Rousselle P, Block MR. RhoA-dependent switch between alpha2beta1 and alpha3beta1 integrins is induced by laminin-5 during early stage of HT-29 cell differentiation. Mol Biol Cell 2001; 12:3268-81. [PMID: 11598208 PMCID: PMC60172 DOI: 10.1091/mbc.12.10.3268] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2000] [Revised: 05/01/2001] [Accepted: 07/20/2001] [Indexed: 02/06/2023] Open
Abstract
Integrin-mediated interactions between the basement membrane and epithelial cells control the differentiation of epithelia. We characterized the modulation of adhesive behaviors to basement membrane proteins and of integrin function in the human colon adenocarcinoma HT-29 cell line, which differentiates into enterocytes after the substitution of galactose for glucose in the medium. We demonstrate an increased capability of these cells to adhere to collagen type IV during the early stage of differentiation. This effect occurs without any changes in integrin cell surface expression but rather results from an alpha2beta1/alpha3beta1 integrin switch, alpha3beta1 integrin becoming the major collagen receptor. The increase in laminin-5 secretion and deposit on the matrix is a key factor in the mechanism regulating cell adhesion, because it is responsible for the activation of alpha3beta1 integrin. Furthermore, down-regulation of RhoA GTPase activity occurs during HT-29 cell differentiation and correlates with the activation of the integrin alpha3beta1. Indeed, C3 transferase, a RhoA GTPase inhibitor, induces a similar alpha2beta1/alpha3beta1 switch in undifferentiated HT-29 cells. These results indicate that the decrease in RhoA activation is the biochemical mechanism underlying this integrin switch observed during cell differentiation. The physiological relevance of such modulation of integrin activity in the functioning of the crypt-villus axis is discussed.
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Affiliation(s)
- S P Gout
- Laboratoire d'Etude de la Différenciation et de l'Adhérence Cellulaires, Unité Mixte de Recherche 5538 Institut Albert Bonniot, La Tronche Cedex, France
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Webersinke G, Bauer HC, Danninger C, Krizbai IA, Schittny JC, Thalhamer J, Bauer H. Use of genetically modified glial cells overexpressing laminin alpha1-chain peptides in neurite outgrowth studies. Cell Mol Neurobiol 2000; 20:605-21. [PMID: 11100971 DOI: 10.1023/a:1007004706028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
1. C6 glioma cells were transfected with two constructs carrying C-terminal laminin alpha1-chain sequences of 117 and 114 bp length, respectively. These sequences are specifically known to code for peptides which have neurite-promoting activity. 2. The stable expression and secretion of the two peptides was detected by Northern and Western blot analysis. 3. Primary neuronal cultures derived from embryonic mouse forebrain were cocultured with these transfected cells and exhibited a substantial increase in neurite outgrowth and in survival time. Conditioned media from the transfected cells generated similar effects. 4. Organotypic cultures from embryonic mouse brain were used as a second system as being closer to the in vivo situation. Again, coculture of brain slices with transfected cells or treatment with laminin peptide-containing media increased neuronal outgrowth.
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Affiliation(s)
- G Webersinke
- Institute for Molecular Biology, Austrian Academy of Science, Salzburg
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