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Lempert M, Halvachizadeh S, Salfelder CC, Neuhaus V, Pape HC, Jukema GN. Long-term experience with a collagen-elastin scaffold in combination with split-thickness skin grafts for the treatment of full-thickness soft tissue defects: improvements in outcome-a retrospective cohort study and case report. Langenbecks Arch Surg 2021; 407:327-335. [PMID: 34480629 PMCID: PMC8847203 DOI: 10.1007/s00423-021-02224-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 06/01/2021] [Indexed: 11/25/2022]
Abstract
Purpose The management of severe soft tissue injuries to the extremities with full-thickness wounds poses a challenge to the patient and surgeon. Dermal substitutes are used increasingly in these defects. The aim of this study was to investigate the impact of the type of injury on the success rate of Matriderm® (MD)-augmented split-thickness skin grafting, as well as the role of negative pressure wound therapy (NPWT) in preconditioning of the wounds, with a special focus on the reduction of the bioburden. Methods In this study, 45 wounds (44 affecting lower extremities (97.7%)), resulting from different types of injuries: soft tissue (ST), soft tissue complications from closed fracture (F), and open fracture (OF) in 43 patients (age 55.0 ± 18.2 years, 46.7% female), were treated with the simultaneous application of MD and split-thickness skin grafting. The study was designed as a retrospective cohort study from March 2013 to March 2020. Patients were stratified into three groups: ST, F, and OF. Outcome variables were defined as the recurrence of treated wound defects, which required revision surgery, and the reduction of bioburden in terms of reduction of number of different bacterial strains. For statistical analysis, Student’s t-test, analysis of variance (ANOVA), Mann–Whitney U test, and Pearson’s chi-squared test were used. Results There was no significant difference in the rate of recurrence in the different groups (F: 0%; OF: 11.1%; ST: 9.5%). The duration of VAC therapy significantly differed between the groups (F: 10.8 days; OF: 22.7 days; ST: 12.6 days (p < 0.05)). A clinically significant reduction of bioburden was achieved with NPWT (bacterial shift (mean (SD), F: − 2.25 (1.89); OF: − 1.9 (1.37); ST: − 2.6 (2.2)). Conclusion MD-augmented split-thickness skin grafting is an appropriate treatment option for full-thickness wounds with take rates of about 90%. The complexity of an injury significantly impacts the duration of the soft tissue treatment but does not have an influence on the take rate. NPWT leads to a relevant reduction of bioburden and is therefore an important part in the preconditioning of full-thickness wounds.
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Affiliation(s)
- Maximilian Lempert
- Department of Trauma, University Hospital Zurich, Raemistr. 100, 8091, Zürich, Switzerland.
| | - Sascha Halvachizadeh
- Department of Trauma, University Hospital Zurich, Raemistr. 100, 8091, Zürich, Switzerland
| | | | - Valentin Neuhaus
- Department of Trauma, University Hospital Zurich, Raemistr. 100, 8091, Zürich, Switzerland
| | - Hans-Christoph Pape
- Department of Trauma, University Hospital Zurich, Raemistr. 100, 8091, Zürich, Switzerland
| | - Gerrolt Nico Jukema
- Department of Trauma, University Hospital Zurich, Raemistr. 100, 8091, Zürich, Switzerland
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Rai R, Roether JA, Knowles JC, Mordan N, Salih V, Locke IC, Gordge MP, McCormick A, Mohn D, Stark WJ, Keshavarz T, Boccaccini AR, Roy I. Highly elastomeric poly(3-hydroxyoctanoate) based natural polymer composite for enhanced keratinocyte regeneration. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2016.1217530] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ranjana Rai
- Department of Life Sciences, Faculty of Science and Technology, University of Westminster, London, United Kingdom
| | - Judith A. Roether
- Department of Materials Science and Engineering, University of Erlangen – Nuremberg, Erlangen, Germany
| | - Jonathan C. Knowles
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, United Kingdom
- WCU Research Centre of Nanobiomedical Science, Dankook University, Chungnam, South Korea
| | - Nicola Mordan
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, United Kingdom
| | - Vehid Salih
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, United Kingdom
| | - Ian C. Locke
- Department of Biomedical Sciences, Faculty of Science and Technology, University of Westminster, London, United Kingdom
| | - Michael P. Gordge
- Department of Biomedical Sciences, Faculty of Science and Technology, University of Westminster, London, United Kingdom
| | - Aine McCormick
- Hemophilia Reference Centre, St. Thomas’ Hospital, London, United Kingdom
| | - Dirk Mohn
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
- Department of Preventive Dentistry, Periodontology, and Cardiology, University of Zurich Center of Dental Medicine, Zurich, Switzerland
| | - Wendelin J. Stark
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
| | - Tajalli Keshavarz
- Department of Life Sciences, Faculty of Science and Technology, University of Westminster, London, United Kingdom
| | - Aldo R. Boccaccini
- Department of Materials Science and Engineering, University of Erlangen – Nuremberg, Erlangen, Germany
| | - Ipsita Roy
- Department of Life Sciences, Faculty of Science and Technology, University of Westminster, London, United Kingdom
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Pramanik N, Mitra T, Khamrai M, Bhattacharyya A, Mukhopadhyay P, Gnanamani A, Basu RK, Kundu PP. Characterization and evaluation of curcumin loaded guar gum/polyhydroxyalkanoates blend films for wound healing applications. RSC Adv 2015. [DOI: 10.1039/c5ra10114j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic representation of the blockage of UV rays and controlled release of curcumin on a wound.
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Affiliation(s)
- Nilkamal Pramanik
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Tapas Mitra
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Moumita Khamrai
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Aditi Bhattacharyya
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - Piyasi Mukhopadhyay
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
| | - A. Gnanamani
- Central Leather Research Institute
- Department of Biological Science (CLRI)
- Chennai
- India
| | - Ranjan Kumar Basu
- Department of Chemical Engineering
- University of Calcutta
- Kolkata-700009
- India
| | - Patit Paban Kundu
- Advanced Polymer Laboratory
- Department of Polymer Science & Technology
- University of Calcutta
- Kolkata-700009
- India
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Cell sheet technology-driven re-epithelialization and neovascularization of skin wounds. Acta Biomater 2014; 10:3145-55. [PMID: 24650971 DOI: 10.1016/j.actbio.2014.03.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 02/12/2014] [Accepted: 03/09/2014] [Indexed: 11/21/2022]
Abstract
Skin regeneration remains a challenge, requiring a well-orchestrated interplay of cell-cell and cell-matrix signalling. Cell sheet (CS) engineering, which has the major advantage of allowing the retrieval of the intact cell layers along with their naturally organized extracellular matrix (ECM), has been poorly explored for the purpose of creating skin substitutes and skin regeneration. This work proposes the use of CS technology to engineer cellular constructs based on human keratinocytes (hKC), key players in wound re-epithelialization, dermal fibroblasts (hDFb), responsible for ECM remodelling, and dermal microvascular endothelial cells (hDMEC), part of the dermal vascular network and modulators of angiogenesis. Homotypic and heterotypic three-dimensional (3-D) CS-based constructs were developed simultaneously to target wound re-vascularization and re-epithelialization. After implantation of the constructs in murine full-thickness wounds, human cells were engrafted into the host wound bed and were present in the neotissue formed up to 14 days post-implantation. Different outcomes were obtained by varying the composition and organization of the 3-D constructs. Both hKC and hDMEC significantly contributed to re-epithelialization by promoting rapid wound closure and early epithelial coverage. Moreover, a significant increase in the density of vessels at day 7 and the incorporation of hDMEC in the neoformed vasculature confirmed its role over neotissue vacularization. As a whole, the obtained results confirmed that the proposed 3-D CS-based constructs provided the necessary cell machinery, when in a specific microenvironment, guiding both re-vascularization and re-epithelialization. Although dependent on the nature of the constructs, the results obtained sustain the hypothesis that different CS-based constructs lead to improved skin healing.
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Bani D, Nistri S. New insights into the morphogenic role of stromal cells and their relevance for regenerative medicine. lessons from the heart. J Cell Mol Med 2014; 18:363-70. [PMID: 24533677 PMCID: PMC3955144 DOI: 10.1111/jcmm.12247] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 01/14/2014] [Indexed: 02/06/2023] Open
Abstract
The term stromal cells is referred to cells of direct or indirect (hematopoietic) mesenchymal origin, and encompasses different cell populations residing in the connective tissue, which share the ability to produce the macromolecular components of the extracellular matrix and to organize them in the correct spatial assembly. In physiological conditions, stromal cells are provided with the unique ability to shape a proper three-dimensional scaffold and stimulate the growth and differentiation of parenchymal precursors to give rise to tissues and organs. Thus, stromal cells have an essential function in the regulation of organ morphogenesis and regeneration. In pathological conditions, under the influence of local pro-inflammatory mediators, stromal cells can be prompted to differentiate into myofibroblasts, which rather express a fibrogenic phenotype required for prompt deposition of reparatory scar tissue. Indeed, scarring may be interpreted as an emergency healing response to injury typical of evolved animals, like mammals, conceivably directed to preserve survival at the expense of function. However, under appropriate conditions, the original ability of stromal cells to orchestrate organ regeneration, which is typical of some lower vertebrates and mammalian embryos, can be resumed. These concepts underline the importance of expanding the knowledge on the biological properties of stromal cells and their role as key regulators of the three-dimensional architecture of the organs in view of the refinement of the therapeutic protocols of regenerative medicine.
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Affiliation(s)
- Daniele Bani
- Department of Experimental & Clinical Medicine, Section of Anatomy & Histology, Research Unit of Histology & Embryology, University of Florence, Florence, Italy
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Rai R, Boccaccini AR, Knowles JC, Mordon N, Salih V, Locke IC, Moshrefi-Torbati M, Keshavarz T, Roy I. The homopolymer poly(3-hydroxyoctanoate) as a matrix material for soft tissue engineering. J Appl Polym Sci 2011. [DOI: 10.1002/app.34772] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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8
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Masuda R, Mochizuki M, Hozumi K, Takeda A, Uchinuma E, Yamashina S, Nomizu M, Kadoya Y. A novel cell-adhesive scaffold material for delivering keratinocytes reduces granulation tissue in dermal wounds. Wound Repair Regen 2009; 17:127-35. [DOI: 10.1111/j.1524-475x.2008.00450.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chermnykh ES, Vorotelyak EA, Tkachenko SB, Vasil'ev AV, Terskikh VV. Proliferation of K19+ human epidermal keratinocytes in vitro. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2008; 416:406-8. [PMID: 18047033 DOI: 10.1134/s0012496607050250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- E S Chermnykh
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 117808 Russia
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10
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Peschel G, Dahse HM, Konrad A, Wieland GD, Mueller PJ, Martin DP, Roth M. Growth of keratinocytes on porous films of poly(3-hydroxybutyrate) and poly(4-hydroxybutyrate) blended with hyaluronic acid and chitosan. J Biomed Mater Res A 2008; 85:1072-81. [DOI: 10.1002/jbm.a.31666] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Wound repair involves the sequential interaction of various cell types, extracellular matrix molecules, and soluble mediators. During the past 10 years, much new information on signals controlling wound cell behavior has emerged. This knowledge has led to a number of novel therapeutic strategies. In particular, the local delivery of pluripotent growth factor molecules to the injured tissue has been intensively investigated over the past decade. Limited success of clinical trails indicates that a crucial aspect of the growth factor wound healing strategy is the effective delivery of these polypeptides to the wound site. A molecular approach in which genetically modified cells synthesize and deliver the desired growth factor in regulated fashion has been used to overcome the limitations associated with the (topical) application of recombinant growth factor proteins. We have summarized the molecular and cellular basis of repair mechanisms and their failure, and we give an overview of techniques and studies applied to gene transfer in tissue repair.
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Affiliation(s)
- Sabine A Eming
- Department of Dermatology, University of Cologne, D-50937 Cologne, Germany
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Souto LRM, Rehder J, Vassallo J, Cintra ML, Kraemer MHS, Puzzi MB. Model for human skin reconstructed in vitro composed of associated dermis and epidermis. SAO PAULO MED J 2006; 124:71-6. [PMID: 16878189 DOI: 10.1590/s1516-31802006000200005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2004] [Accepted: 03/07/2006] [Indexed: 04/07/2023] Open
Abstract
CONTEXT AND OBJECTIVE The technique of obtaining human skin with dermis and epidermis reconstructed from cells isolated from patients can enable autologous skin grafting on patients with few donor sites. It also enables in vitro trials on chemicals and drugs. The objective of this work was to demonstrate a method for obtaining human skin composed of associated dermis and epidermis, reconstructed in vitro. DESIGN AND SETTING Experimental laboratory study, in the Skin Cell Culture Laboratory of Faculdade de Ciências Médicas, Universidade Estadual de Campinas. METHODS Cells from human fibroblast cultures are injected into bovine collagen type I matrix and kept immersed in specific culturing medium for fibroblasts. This enables human dermis reconstruction in vitro. On this, by culturing human keratinocytes and melanocytes, differentiated epidermis is formed, leading to the creation of human skin composed of associated dermis and epidermis, reconstructed in vitro. RESULTS We showed that human skin composed of associated dermis and epidermis can be successfully reconstructed in vitro. It is histologically formed in the same way as human skin in vivo. Collagen tissue can be identified in the dermis, with cells and extracellular matrix organized in parallel to multilayer epidermis. CONCLUSIONS It is possible to obtain completely differentiated human skin composed of associated dermis and epidermis, reconstructed in vitro, from injection of human fibroblasts into bovine collagen type I matrix and culturing of human keratinocytes and melanocytes on this matrix.
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Affiliation(s)
- Luís Ricardo Martinhão Souto
- Skin Cell Culture Laboratory, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (Unicamp), Campinas, São Paulo, Brazil.
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13
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Eming SA, Krieg T, Davidson JM. Gene transfer in tissue repair: status, challenges and future directions. Expert Opin Biol Ther 2005; 4:1373-86. [PMID: 15335305 DOI: 10.1517/14712598.4.9.1373] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Wound repair involves a complex interaction of various cell types, extracellular matrix molecules and soluble mediators. Details on signals controlling wound cell activities are beginning to emerge. In recent years this knowledge has been applied to a number of therapeutic strategies in soft tissue repair. Key challenges include re-adjusting the adult repair process in order to augment diseased healing processes, and providing the basis for a regenerative rather than a reparative wound environment. In particular, the local delivery of pluripotent growth factor molecules to the injured tissue has been intensively investigated over the past decade. Limited success of clinical trials indicates that an important aspect of the growth factor wound-healing paradigm is the effective delivery of these polypeptides to the wound site. A molecular genetic approach in which genetically modified cells synthesise and deliver the desired growth factor in a time-regulated manner is a powerful means to overcome the limitations associated with the (topical) application of recombinant growth factor proteins. This article summarises repair mechanisms and their failure, and gives an overview of techniques and studies applied to gene transfer in tissue repair. It also provides perspectives on potential targets for gene transfer technology.
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Affiliation(s)
- Sabine A Eming
- University of Cologne, Department of Dermatology, Cologne, Joseph-Stelzmann Str. 9, 50931 Köln, Germany.
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14
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Vasiliev AV, Makarov PV, Rogovaya OS, Gundorova RA, Terskikh VV. Repair of corneal defects using tissue engineering. BIOL BULL+ 2005. [DOI: 10.1007/s10525-005-0001-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Navrátilová Z, Slonková V, Semrádová V, Adler J. Cryopreserved and lyophilized cultured epidermal allografts in the treatment of leg ulcers: a pilot study. J Eur Acad Dermatol Venereol 2004; 18:173-9. [PMID: 15009297 DOI: 10.1111/j.1468-3083.2004.00873.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND In the conservative therapy of venous leg ulcers modern types of dressings are used most frequently. In the past 20 years 'active wound dressings' - cultured epidermal keratinocytes as autografts and allografts - were also introduced in the management of leg ulcers. METHODS The aim of our study was to compare the effect of cryopreserved and lyophilized cultured epidermal allografts in the treatment of venous leg ulcers. Evaluation of the therapy was documented as photodocumentation, planimetry, healing time and evaluation of pain relief over a 3-month period after application. Fifty patients with venous leg ulcers were selected. Twenty-five patients (group I) were treated with cryopreserved keratinocytes and 25 (group II) with lyophilized keratinocytes. RESULTS The final evaluation 3 months after the application of allografts showed 84% of healed ulcers in group I and 80% in group II. The number of healed ulcers and the healing rate both showed no statistically significant differences. The size of the ulcer was reduced by half during the first week in both groups. The size differences during the first week are statistically significant in both groups and they are comparable (P < 0.001). The intensity of the pain was statistically significantly reduced during the first week after application in both groups (P < 0.001). CONCLUSIONS The cryopreserved and lyophilized cultured allografts are comparable in healing rate, course of healing and relief of pain, and also in planimetric changes during the healing of venous leg ulcers. Lyophilized allografts are more convenient for routine use than cryopreserved allografts as they can be stored at room temperature. These results could give rise to the more frequent use of lyophilized allografts in slow-healing venous leg ulcers.
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Affiliation(s)
- Z Navrátilová
- Department of Dermatovenereology, St Anna Faculty Hospital, Pekaøská 53, Brno, Czech Republic
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Rehder J, Souto LRM, Issa CMBM, Puzzi MB. Model of human epidermis reconstructed in vitro with keratinocytes and melanocytes on dead de-epidermized human dermis. SAO PAULO MED J 2004; 122:22-5. [PMID: 15160523 DOI: 10.1590/s1516-31802004000100006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
CONTEXT Recent progress in the field of epithelial culture techniques has allowed the development of culture systems in which the reconstructed epidermis presents characteristics of morphological differentiation similar to those seen in vivo. Human epidermis reconstructed in vitro may be used as the best alternative for the in vitro testing of the toxicology and efficiency of products for topical use, as well as in the treatment of skin burns and chronic skin ulcers. OBJECTIVE To demonstrate a method for obtaining human epidermis reconstructed in vitro, using keratinocytes and melanocytes cultivated on dead de-epidermized human dermis. TYPE OF STUDY Experimental/laboratory. SETTING Skin Cell Culture Laboratory of the Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil. PROCEDURE Human keratinocytes and melanocytes cultured in vitro were grown on a biological matrix (dead de-epidermized human dermis) and the system was kept at an air-liquid interface, in a suitable culturing medium, until a stratified human epidermis was formed, maintaining the histological characteristics of the epidermis in vivo. RESULTS It was histologically demonstrated that it is possible to reproduce a differentiated epidermis through keratinocytes and melanocytes cultured on dead de-epidermized human dermis, thus obtaining a correctly positioned human epidermis reconstructed in vitro with functional keratinocytes and melanocytes that is similar to in vivo epidermis. CONCLUSIONS It is possible to obtain a completely differentiated human epidermis reconstructed in vitro from keratinocyte and melanocyte cultures on a dead de-epidermized human dermis.
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Affiliation(s)
- Jussara Rehder
- Skin Cell Culture Laboratory, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
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Abstract
Gene therapy is a new and emerging technology that has been catalyzed by the progress of the Human Genome Project. It employs the process of manipulating genes to achieve a clinically beneficial alteration in gene product. Wound healing lends itself to the application of gene therapy by virtue of the vast array of proteins involved in its complex cascade. This article provides an overview of the background to gene therapy and describes current techniques in use as applied to wound healing. The authors show the potential role that many candidate genes may offer in the future for optimizing wound healing through gene therapy.
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Affiliation(s)
- Nicola C Petrie
- Laboratory of Wound Repair and Gene Transfer, Division of Plastic Surgery, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA
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18
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Abstract
The treatment of large burn areas can pose major problems if there are insufficient donor sites. In such cases, cultured autologous keratinocyte sheets present a viable alternative.
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Affiliation(s)
- J Shelton
- RAFT Institute of Plastic Surgery, Northwood, UK
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19
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Soft tissue alternatives in head and neck reconstruction: recent developments in bioengineering. Curr Opin Otolaryngol Head Neck Surg 2000. [DOI: 10.1097/00020840-200008000-00007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Pageot LP, Perreault N, Basora N, Francoeur C, Magny P, Beaulieu JF. Human cell models to study small intestinal functions: recapitulation of the crypt-villus axis. Microsc Res Tech 2000; 49:394-406. [PMID: 10820523 DOI: 10.1002/(sici)1097-0029(20000515)49:4<394::aid-jemt8>3.0.co;2-k] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The intestinal epithelium is continuously and rapidly renewed by a process involving cell generation, migration, and differentiation, from the stem cell population located at the bottom of the crypt to the extrusion of the terminally differentiated cells at the tip of the villus. Because of the lack of normal human intestinal cell models, most of our knowledge about the regulation of human intestinal cell functions has been derived from studies conducted on cell cultures generated from experimental animals and human colon cancers. However, important advances have been achieved over recent years in the generation of normal human intestinal cell models. These models include (a) intestinal cell lines with typical crypt cell proliferative noncommitted characteristics, (b) conditionally immortalized intestinal cell lines that can be induced to differentiate, and (c) primary cultures of differentiated villuslike cells that can be maintained in culture for up to 10 days. Each of these models should help in the investigation of the specific aspects of human intestinal function and regulation. Furthermore, taken together, these models provide an integrated system that allows an in vitro recapitulation of the entire crypt-villus axis of the normal human small intestine.
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Affiliation(s)
- L P Pageot
- MRC Group in Functional Development and Physiopathology of the Digestive Tract, Département d'anatomie et de biologie cellulaire, Faculté de médecine, Université de Sherbrooke, Sherbrooke, Québec, Canada J1H 5N4
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