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Abstract
Reconstructed human skin models are a valuable tool for drug discovery, disease modeling, and basic research. In the past decades, major progress has been made in this field leading to the development of full-thickness skin models (FTSms) better representative of the native human skin by including the cellular cross talk between the dermal and epidermal layers. However, current available FTSms still present important limitations since they are only suitable for short-term studies, include nonhuman extracellular matrix (ECM) components and have a weak skin barrier function compared with in vivo human skin. In this study, a fibroblast-derived matrix was combined with the use of an inert polystyrene scaffold for the development of a fully human dermis capable of supporting a differentiated epidermis. To produce a pigmented FTSm, a coculture with keratinocytes, melanocytes, and fibroblasts was established. The structure and functionality of the developed FTSms were studied for short- and long-term cultivation using histological and immunofluorescence staining. The integrity of the skin barrier was evaluated using transepithelial electrical resistance (TEER) measurements. It was possible to obtain a mature dermis capable of supporting an epidermis without keratinocyte infiltration in only 6 days. ECM components (collagen IV and fibrin) were secreted by the fibroblasts and accumulated in the scaffold structure, recreating the microenvironment of the native human dermis. Moreover, the use of a scaffold resulted in a structure with mechanical stability due to its noncontracting nature. The coculture of primary human keratinocytes resulted in a terminally differentiated skin equivalent that could maintain its architecture and homeostasis up to 50 days. Melanocytes were correctly integrated within the epidermal basal layer and made it possible to reproduce constitutive pigmentation. TEER levels increased during culture time, reaching values of 1.1 ± 0.2 kΩ.cm2 for the FTSm, indicative of a functional skin barrier.
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Affiliation(s)
- Patrícia Zoio
- Biomolecular Diagnostic Laboratory, Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa (UNL), Oeiras, Portugal
| | - Sara Ventura
- Biomolecular Diagnostic Laboratory, Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa (UNL), Oeiras, Portugal
| | - Mafalda Leite
- Biomolecular Diagnostic Laboratory, Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa (UNL), Oeiras, Portugal
| | - Abel Oliva
- Biomolecular Diagnostic Laboratory, Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa (UNL), Oeiras, Portugal.,Department of Biomolecular Diagnostics, Instituto de Biologia Experimental e Tecnológica (IBET), Oeiras, Portugal
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Clarke AW, Poulton L, Shim D, Mabon D, Butt D, Pollard M, Pande V, Husten J, Lyons J, Tian C, Doyle AG. An anti-TL1A antibody for the treatment of asthma and inflammatory bowel disease. MAbs 2018; 10:664-677. [PMID: 29436901 PMCID: PMC5973687 DOI: 10.1080/19420862.2018.1440164] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
TL1A is an attractive therapeutic target for the treatment of mucosal inflammation associated with inflammatory bowel disease (IBD) and asthma. Blockade of the TL1A pathway has been shown to reduce inflammatory responses while leaving baseline immunity intact, and to be beneficial in animal models of colitis and asthma. Given the therapeutic potential of blocking this pathway in IBD and asthma, we developed C03V, a human antibody that binds with high affinity to soluble and membrane-bound TL1A. In an assay measuring apoptosis induced by exogenous TL1A, C03V was 43-fold more potent than the next most potent anti-TL1A antibody analyzed. C03V also potently inhibited endogenous TL1A activity in a primary cell-based assay. This potency was linked to the C03V-binding epitope on TL1A, encompassing the residue R32. This residue is critical for the binding of TL1A to its signaling receptor DR3 but not to its decoy receptor DcR3, and explains why C03V inhibited TL1A-DR3 binding to a much greater extent than TL1A-DcR3 binding. This characteristic may be advantageous to preserve some of the homeostatic functions of DcR3, such as TL1A antagonism. In colitis models, C03V significantly ameliorated microscopic, macroscopic and clinical aspects of disease pathology, and in an asthma model it significantly reduced airways inflammation. Notable in both types of disease model was the reduction in fibrosis observed after C03V treatment. C03V has the potential to address unmet medical needs in asthma and IBD.
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Affiliation(s)
- Adam W Clarke
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Lynn Poulton
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Doris Shim
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - David Mabon
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Danyal Butt
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Matthew Pollard
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Vanya Pande
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Jean Husten
- b Teva Pharmaceuticals, R&D, Biologics , Assays and Technology , West Chester , PA , USA
| | - Jacquelyn Lyons
- b Teva Pharmaceuticals, R&D, Biologics , Assays and Technology , West Chester , PA , USA
| | - Chen Tian
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
| | - Anthony G Doyle
- a Teva Pharmaceuticals, R&D , Biologics, Lead Antibody Discovery , Sydney , Australia
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