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De Los Santos Gomez P, Costello L, Goncalves K, Przyborski S. Comparison of photodamage in non-pigmented and pigmented human skin equivalents exposed to repeated ultraviolet radiation to investigate the role of melanocytes in skin photoprotection. Front Med (Lausanne) 2024; 11:1355799. [PMID: 38698778 PMCID: PMC11063240 DOI: 10.3389/fmed.2024.1355799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 03/20/2024] [Indexed: 05/05/2024] Open
Abstract
Introduction Daily solar ultraviolet (UV) radiation has an important impact on skin health. Understanding the initial events of the UV-induced response is critical to prevent deleterious conditions. However, studies in human volunteers have ethical, technical, and economic implications that make skin equivalents a valuable platform to investigate mechanisms related to UV exposure to the skin. In vitro human skin equivalents can recreate the structure and function of in vivo human skin and represent a valuable tool for academic and industrial applications. Previous studies have utilised non-pigmented full-thickness or pigmented epidermal skin equivalents to investigate skin responses to UV exposure. However, these do not recapitulate the dermal-epidermal crosstalk and the melanocyte role in photoprotection that occurs in vivo. In addition, the UV radiation used in these studies is generally not physiologically representative of real-world UV exposure. Methods Well-characterised pigmented and non-pigmented skin equivalents that contain human dermal fibroblasts, endogenous secreted extracellular matrix proteins (ECM) and a well-differentiated and stratified epidermis have been developed. These constructs were exposed to UV radiation for ×5 consecutive days with a physiologically relevant UV dose and subsequently analysed using appropriate end-points to ascertain photodamage to the skin. Results We have described that repeated irradiation of full-thickness human skin equivalents in a controlled laboratory environment can recreate UV-associated responses in vitro, mirroring those found in photoexposed native human skin: morphological damage, tanning, alterations in epidermal apoptosis, DNA lesions, proliferation, inflammatory response, and ECM-remodelling. Discussion We have found a differential response when using the same UV doses in non-pigmented and pigmented full-thickness skin equivalents, emphasising the role of melanocytes in photoprotection.
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Affiliation(s)
| | - Lydia Costello
- Department of Biosciences, Durham University, Durham, United Kingdom
| | - Kirsty Goncalves
- Department of Biosciences, Durham University, Durham, United Kingdom
| | - Stefan Przyborski
- Department of Biosciences, Durham University, Durham, United Kingdom
- Reprocell Europe Ltd., Glasgow, United Kingdom
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2
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Ropret S, Khurana P, Fabčič T, Cvetkovska J, Trobec A, Jokhadar ŠZ, Ilic D, McGrath JA, Guttmann-Gruber C, Liovic M. Induced pluripotent stem cell (iPSC) line MLi005-A derived from a patient with dominant dystrophic epidermolysis bullosa (DDEB). Stem Cell Res 2024; 75:103306. [PMID: 38271763 DOI: 10.1016/j.scr.2024.103306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/22/2023] [Accepted: 01/04/2024] [Indexed: 01/27/2024] Open
Abstract
We have generated MLi005-A, a new induced pluripotent stem cell (iPSC) line derived from skin fibroblasts of a male patient with dominant dystrophic epidermolysis bullosa (DDEB). This iPSC line may be used as a model system for studies on skin integrity, the extracellular matrix and skin barrier function. The characterization of the MLi005-A cell line consisted of molecular karyotyping, next-generation sequencing of the COL7A1 alleles, pluripotency and differentiation potentials testing by immunofluorescence of associated markers in vitro. The MLi-005A line has been also tested for ability to differentiate into fibroblasts and keratinocytes and markers associated with these cell types.
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Affiliation(s)
- Sandra Ropret
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Slovenia
| | - Preeti Khurana
- Stem Cell Lab, Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London and Assisted Conception Unit, Guy's Hospital, London, UK
| | - Tara Fabčič
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Slovenia
| | - Janina Cvetkovska
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Slovenia
| | - Ana Trobec
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Slovenia
| | | | - Dusko Ilic
- Stem Cell Lab, Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London and Assisted Conception Unit, Guy's Hospital, London, UK
| | - John A McGrath
- Genetic Skin Disease Group, St John's Institute of Dermatology, Guy's Hospital, London, UK
| | - Christina Guttmann-Gruber
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Mirjana Liovic
- Medical Center for Molecular Biology, Faculty of Medicine, University of Ljubljana, Slovenia.
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3
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Salminen AT, Manga P, Camacho L. Race, pigmentation, and the human skin barrier-considerations for dermal absorption studies. FRONTIERS IN TOXICOLOGY 2023; 5:1271833. [PMID: 37886124 PMCID: PMC10598584 DOI: 10.3389/ftox.2023.1271833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023] Open
Abstract
A functional human skin barrier is critical in limiting harmful exposure to environmental agents and regulating the absorption of intentionally applied topical drug and cosmetic products. Inherent differences in the skin barrier between consumers due to extrinsic and intrinsic factors are an important consideration in the safety assessment of dermatological products. Race is a concept often used to describe a group of people who share distinct physical characteristics. The observed predisposition of specific racial groups to certain skin pathologies highlights the potential differences in skin physiology between these groups. In the context of the human skin barrier, however, the current data correlating function to race often conflict, likely as a consequence of the range of experimental approaches and controls used in the existing works. To date, a variety of methods have been developed for evaluating compound permeation through the human skin, both in vivo and in vitro. Additionally, great strides have been made in the development of reconstructed human pigmented skin models, with the flexibility to incorporate melanocytes from donors of different race and pigmentation levels. Together, the advances in the production of reconstructed human skin models and the increased adoption of in vitro methodologies show potential to aid in the standardization of dermal absorption studies for discerning racial- and skin pigmentation-dependent differences in the human skin barrier. This review analyzes the existing data on skin permeation, focusing on its interaction with race and skin pigmentation, and highlights the tools and research opportunities to better represent the diversity of the human populations in dermal absorption assessments.
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Affiliation(s)
- Alec T Salminen
- U.S. Food and Drug Administration, National Center for Toxicological Research, Jefferson, AR, United States
| | - Prashiela Manga
- U.S. Food and Drug Administration, Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, College Park, MD, United States
| | - Luísa Camacho
- U.S. Food and Drug Administration, National Center for Toxicological Research, Jefferson, AR, United States
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4
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Bouchard KV, Costin GE. Promoting New Approach Methodologies (NAMs) for research on skin color changes in response to environmental stress factors: tobacco and air pollution. FRONTIERS IN TOXICOLOGY 2023; 5:1256399. [PMID: 37886123 PMCID: PMC10598764 DOI: 10.3389/ftox.2023.1256399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 08/25/2023] [Indexed: 10/28/2023] Open
Abstract
Aging is one of the most dynamic biological processes in the human body and is known to carry significant impacts on individuals' self-esteem. Skin pigmentation is a highly heritable trait made possible by complex, strictly controlled cellular and molecular mechanisms. Genetic, environmental and endocrine factors contribute to the modulation of melanin's amount, type and distribution in the skin layers. One of the hallmarks of extrinsic skin aging induced by environmental stress factors is the alteration of the constitutive pigmentation pattern clinically defined as senile lentigines and/or melasma or other pigmentary dyschromias. The complexity of pollutants and tobacco smoke as environmental stress factors warrants a thorough understanding of the mechanisms by which they impact skin pigmentation through repeated and long-term exposure. Pre-clinical and clinical studies demonstrated that pollutants are known to induce reactive oxygen species (ROS) or inflammatory events that lead directly or indirectly to skin hyperpigmentation. Another mechanistic direction is provided by Aryl hydrocarbon Receptors (AhR) which were shown to mediate processes leading to skin hyperpigmentation in response to pollutants by regulation of melanogenic enzymes and transcription factors involved in melanin biosynthesis pathway. In this context, we will discuss a diverse range of New Approach Methodologies (NAMs) capable to provide mechanistic insights of the cellular and molecular pathways involved in the action of environmental stress factors on skin pigmentation and to support the design of raw ingredients and formulations intended to counter their impact and of any subsequently needed clinical studies.
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5
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Hong ZX, Zhu ST, Li H, Luo JZ, Yang Y, An Y, Wang X, Wang K. Bioengineered skin organoids: from development to applications. Mil Med Res 2023; 10:40. [PMID: 37605220 PMCID: PMC10463602 DOI: 10.1186/s40779-023-00475-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 08/01/2023] [Indexed: 08/23/2023] Open
Abstract
Significant advancements have been made in recent years in the development of highly sophisticated skin organoids. Serving as three-dimensional models that mimic human skin, these organoids have evolved into complex structures and are increasingly recognized as effective alternatives to traditional culture models and human skin due to their ability to overcome the limitations of two-dimensional systems and ethical concerns. The inherent plasticity of skin organoids allows for their construction into physiological and pathological models, enabling the study of skin development and dynamic changes. This review provides an overview of the pivotal work in the progression from 3D layered epidermis to cyst-like skin organoids with appendages. Furthermore, it highlights the latest advancements in organoid construction facilitated by state-of-the-art engineering techniques, such as 3D printing and microfluidic devices. The review also summarizes and discusses the diverse applications of skin organoids in developmental biology, disease modelling, regenerative medicine, and personalized medicine, while considering their prospects and limitations.
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Affiliation(s)
- Zi-Xuan Hong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Shun-Tian Zhu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Hao Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Jing-Zhi Luo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Yu Yang
- Department of Hepatopancreatobiliary Surgery, the Third Affiliated Hospital of Soochow University, Changzhou, 213000, Jiangsu, China
| | - Yang An
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, 100191, China.
| | - Xi Wang
- Clinical Stem Cell Research Center, Peking University Third Hospital, Beijing, 100191, China.
| | - Kai Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China.
- Clinical Stem Cell Research Center, Peking University Third Hospital, Beijing, 100191, China.
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, Beijing, 100037, China.
- Beijing Key Laboratory of Metabolic Disorder Related Cardiovascular Disease, Capital Medical University, Beijing, 100050, China.
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6
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Starzonek C, Mhamdi-Ghodbani M, Henning S, Bender M, Degenhardt S, Chen IP, Said M, Greinert R, Volkmer B. Enrichment of Human Dermal Stem Cells from Primary Cell Cultures through the Elimination of Fibroblasts. Cells 2023; 12:cells12060949. [PMID: 36980290 PMCID: PMC10047019 DOI: 10.3390/cells12060949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Dermal stem cells (DSCs), which are progenitor cells of melanocytes, are isolated from human foreskin and cultivated as mixed cultures containing both DSCs and fibroblasts in varying proportions. These contaminating fibroblasts may have an impact on the results of experimental studies and are a serious limitation for certain applications. The aim of the present study was to purify or enrich DSCs-an indispensable step towards future investigations. Applying different methods, we demonstrated that highly enriched DSCs with a good recovery rate can be obtained through positive selection with MACS® immunomagnetic cell sorting. These DSCs remain vital and proliferate constantly in culture, maintaining a high level of purity after enrichment. Other approaches such as treatment with Geneticin or selective detachment were not suitable to purify DSC-fibroblast co-cultures. Overall, enriched DSCs represent a novel and unique model to study the effects of UV radiation on the differentiation of DSCs into melanocytes and their potential relevance in the genesis of malignant melanoma.
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Affiliation(s)
- Christin Starzonek
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - Mouna Mhamdi-Ghodbani
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - Stefan Henning
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - Marc Bender
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - Sarah Degenhardt
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - I-Peng Chen
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | | | - Rüdiger Greinert
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
| | - Beate Volkmer
- Skin Cancer Center, Division of Molecular Cell Biology, Elbe Kliniken Stade-Buxtehude, 21614 Buxtehude, Germany
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7
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Goncalves K, De Los Santos Gomez P, Costello L, Smith L, Mead H, Simpson A, Przyborski S. Investigation into the effect of skin tone modulators and exogenous stress on skin pigmentation utilizing a novel bioengineered skin equivalent. Bioeng Transl Med 2023; 8:e10415. [PMID: 36925688 PMCID: PMC10013773 DOI: 10.1002/btm2.10415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/08/2022] [Accepted: 08/30/2022] [Indexed: 11/11/2022] Open
Abstract
Human skin equivalents (HSEs) are a popular technology due to limitations in animal testing, particularly as they recapitulate aspects of structure and function of human skin. Many HSEs contain two basic cell types to model dermal and epidermal compartments, however this limits their application, particularly when investigating the effect of exogenous stressors on skin health. We describe the development of a novel platform technology that accurately replicates skin pigmentation in vitro. Through incorporation of melanocytes, specialized pigment producing cells, into the basal layer of the epidermis we are able to re-create skin pigmentation in vitro. We observe apical distribution of melanin within keratinocytes and formation of supranuclear caps (SPNCs), only when the epidermal compartment is co-cultured with a dermal compartment, leading to the conclusion that fibroblast support is essential for correct pigment organization. We also evaluate the commonly observed phenomenon that pigmentation darkens with time in vitro, which we further explore through mechanical exfoliation to remove a build-up of melanin deposits in the stratum corneum. Finally, we demonstrate the application of a pigmented HSE to investigate drug modulation of skin tone and protection from UV-induced damage, highlighting the importance of such a model in the wider context of skin biology.
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Affiliation(s)
| | | | | | - Lucy Smith
- Department of Biosciences Durham University Durham UK
| | - Hugh Mead
- Department of Biosciences Durham University Durham UK
| | - Amy Simpson
- Department of Biosciences Durham University Durham UK
| | - Stefan Przyborski
- Department of Biosciences Durham University Durham UK.,Reprocell Europe Ltd Glasgow UK
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8
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Cohen C, Flouret V, Herlyn M, Fukunaga-Kalabis M, Li L, Bernerd F. Induced pluripotent stem cells reprogramming overcomes technical limitations for highly pigmented adult melanocyte amplification and integration in 3D skin model. Pigment Cell Melanoma Res 2023; 36:232-245. [PMID: 36478412 PMCID: PMC10731472 DOI: 10.1111/pcmr.13077] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 11/07/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022]
Abstract
Understanding pigmentation regulations taking into account the original skin color type is important to address pigmentary disorders. Biological models including adult melanocytes from different phenotypes allow to perform fine-tuned explorative studies and support discovery of treatments adapted to populations' skin color. However, technical challenges arise when trying to not only isolate but also amplify melanocytes from highly pigmented adult skin. To bypass the initial isolation and growth of cutaneous melanocytes, we harvested and expanded fibroblasts from light and dark skin donors and reprogrammed them into iPSC, which were then differentiated into melanocytes. The resulting melanocyte populations displayed high purity, genomic stability, and strong proliferative capacity, the latter being a critical parameter for dark skin cells. The iPSC-derived melanocyte strains expressed lineage-specific markers and could be successfully integrated into reconstructed skin equivalent models, revealing pigmentation status according to the native phenotype. In both monolayer cultures and 3D skin models, the induced melanocytes demonstrated responsiveness to promelanogenic stimuli. The data demonstrate that the iPSC-derived melanocytes with high proliferative capacity maintain their pigmentation genotype and phenotypic properties up to a proper integration into 3D skin equivalents, even for highly pigmented cells.
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Affiliation(s)
| | | | | | | | - Ling Li
- The Wistar Institute, Philadelphia, Pennsylvania, USA
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9
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Nishimoto R, Kodama C, Yamashita H, Hattori F. Human Induced Pluripotent Stem Cell-Derived Keratinocyte-Like Cells for Research on Protease-Activated Receptor 2 in Nonhistaminergic Cascades of Atopic Dermatitis . J Pharmacol Exp Ther 2023; 384:248-253. [PMID: 36351795 DOI: 10.1124/jpet.122.001412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/13/2022] [Accepted: 10/06/2022] [Indexed: 11/11/2022] Open
Abstract
Keratinocytes are the most abundant cells in the epidermis, and as part of the frontline immunologic defense system, keratinocytes function as a barrier to exogenous attacks. Protease-activated receptor 2 (PAR2) is expressed in human keratinocytes and activated in several inflammatory conditions, such as atopic dermatitis (AD). In this study, we demonstrated the differentiation of human induced pluripotent stem cell into keratinocytes by the improved, robust differentiation procedure and confirmed that human induced pluripotent stem cell-derived keratinocyte-like cells (iKera) express PAR2, which is activated by external addition of the ligand peptide and trypsin. The activation of PAR2 led to the release of calcium from intracellular calcium storage, followed by the release of the proinflammatory cytokine tumor necrosis factor α Moreover, PAR2 antagonist I-191 (CAS No. 1690172-25-8) inhibited calcium release in a dose-dependent manner. This is the first study to demonstrate that iKera expresses a functional PAR2 protein. Furthermore, our results indicate crosstalk between the PAR2- and IL-4-mediated inflammatory axes in iKera, suggesting that iKera can be used as a platform for a broad range of mechanism-targeted drug screening in AD. SIGNIFICANCE STATEMENT: This is the first study to provide evidence that human induced pluripotent stem cell-derived keratinocyte-like cells (iKera) express functional protease-activated receptor 2 (PAR2). Furthermore, this study demonstrated in iKera that the IL-4 inflammatory axis can crosstalk with the PAR2-mediated inflammatory axis in keratinocytes. To the best of our knowledge, this is the first report to indicate that iKera can be used for research and as a drug screening platform for atopic dermatitis.
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Affiliation(s)
- Rio Nishimoto
- Innovative Regenerative Medicine, Kansai Medical University, Graduate School of Medicine, Osaka, Japan (R.N., C.K., H.Y., F.H.) and Osaka College of High-Technology, Osaka, Japan (R.N., C.K.)
| | - Chinatsu Kodama
- Innovative Regenerative Medicine, Kansai Medical University, Graduate School of Medicine, Osaka, Japan (R.N., C.K., H.Y., F.H.) and Osaka College of High-Technology, Osaka, Japan (R.N., C.K.)
| | - Hiromi Yamashita
- Innovative Regenerative Medicine, Kansai Medical University, Graduate School of Medicine, Osaka, Japan (R.N., C.K., H.Y., F.H.) and Osaka College of High-Technology, Osaka, Japan (R.N., C.K.)
| | - Fumiyuki Hattori
- Innovative Regenerative Medicine, Kansai Medical University, Graduate School of Medicine, Osaka, Japan (R.N., C.K., H.Y., F.H.) and Osaka College of High-Technology, Osaka, Japan (R.N., C.K.)
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10
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Pappalardo A, Alvarez Cespedes D, Fang S, Herschman AR, Jeon EY, Myers KM, Kysar JW, Abaci HE. Engineering edgeless human skin with enhanced biomechanical properties. SCIENCE ADVANCES 2023; 9:eade2514. [PMID: 36706190 PMCID: PMC9882972 DOI: 10.1126/sciadv.ade2514] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 12/23/2022] [Indexed: 06/01/2023]
Abstract
Despite the advancements in skin bioengineering, 3D skin constructs are still produced as flat tissues with open edges, disregarding the fully enclosed geometry of human skin. Therefore, they do not effectively cover anatomically complex body sites, e.g., hands. Here, we challenge the prevailing paradigm by engineering the skin as a fully enclosed 3D tissue that can be shaped after a body part and seamlessly transplanted as a biological clothing. Our wearable edgeless skin constructs (WESCs) show enhanced dermal extracellular matrix (ECM) deposition and mechanical properties compared to conventional constructs. WESCs display region-specific cell/ECM alignment, as well as physiologic anisotropic mechanical properties. WESCs replace the skin in full-thickness wounds of challenging body sites (e.g., mouse hindlimbs) with minimal suturing and shorter surgery time. This study provides a compelling technology that may substantially improve wound care and suggests that the recapitulation of the tissue macroanatomy can lead to enhanced biological function.
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Affiliation(s)
- Alberto Pappalardo
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - David Alvarez Cespedes
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Shuyang Fang
- Department of Mechanical Engineering, School of Engineering and Applied Science, Columbia University, New York, NY 10027, USA
| | - Abigail R. Herschman
- Department of Mechanical Engineering, School of Engineering and Applied Science, Columbia University, New York, NY 10027, USA
| | - Eun Young Jeon
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Kristin M. Myers
- Department of Mechanical Engineering, School of Engineering and Applied Science, Columbia University, New York, NY 10027, USA
| | - Jeffrey W. Kysar
- Department of Mechanical Engineering, School of Engineering and Applied Science, Columbia University, New York, NY 10027, USA
- Department of Otolaryngology - Head & Neck Surgery, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Hasan Erbil Abaci
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY 10032, USA
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11
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Sharma P, Kumar A, Dey AD. Cellular Therapeutics for Chronic Wound Healing: Future for Regenerative Medicine. Curr Drug Targets 2022; 23:1489-1504. [PMID: 35748548 DOI: 10.2174/138945012309220623144620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/10/2021] [Accepted: 02/01/2022] [Indexed: 01/25/2023]
Abstract
Chronic wounds are associated with significant morbidity and mortality, which demand long-term effective treatment and represent a tremendous financial strain on the global healthcare systems. Regenerative medicines using stem cells have recently become apparent as a promising approach and are an active zone of investigation. They hold the potential to differentiate into specific types of cells and thus possess self-renewable, regenerative, and immune-modulatory effects. Furthermore, with the rise of technology, various cell therapies and cell types such as Bone Marrow and Adipose-derived Mesenchymal Cell (ADMSC), Endothelial Progenitor Cells (EPCs), Embryonic Stem Cells (ESCs), Mesenchymal Stem Cell (MSCs), and Pluripotent Stem Cells (PSCs) are studied for their therapeutic impact on reparative processes and tissue regeneration. Cell therapy has proven to have substantial control over enhancing the quality and rate of skin regeneration and wound restoration. The literature review brings to light the mechanics of wound healing, abnormalities resulting in chronic wounds, and the obstacles wound care researchers face, thus exploring the multitude of opportunities for potential improvement. Also, the review is focused on providing particulars on the possible cell-derived therapeutic choices and their associated challenges in healing, in the context of clinical trials, as solutions to these challenges will provide fresh and better future opportunities for improved study design and therefore yield a substantial amount of data for the development of more specialized treatments.
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Affiliation(s)
- Preety Sharma
- Chitkara College of Pharmacy, Chitkara University, Punjab, India.,Government Pharmacy College Kangra, Nagrota Bhagwan, Himachal Pradesh, India
| | - Arun Kumar
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Asmita Deka Dey
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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12
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Katiyar S, Singh D, Kumari S, Srivastava P, Mishra A. Novel strategies for designing regenerative skin products for accelerated wound healing. 3 Biotech 2022; 12:316. [PMID: 36276437 PMCID: PMC9547767 DOI: 10.1007/s13205-022-03331-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/23/2022] [Indexed: 11/01/2022] Open
Abstract
Healthy skin protects from pathogens, water loss, ultraviolet rays, and also maintains homeostasis conditions along with sensory perceptions in normal circumstances. Skin wound healing mechanism is a multi-phased biodynamic process that ultimately triggers intercellular and intracellular mechanisms. Failure to implement the normal and effective healing process may result in chronic injuries and aberrant scarring. Chronic wounds lead to substantial rising healthcare expenditure, and innovative methods to diagnose and control severe consequences are urgently needed. Skin tissue engineering (STE) has achieved several therapeutic accomplishments during the last few decades, demonstrating tremendous development. The engineered skin substitutes provide instant coverage for extensive wounds and facilitate the prevention of microbial infections and fluid loss; furthermore, they help in fighting inflammation and allow rapid neo-tissue formation. The current review primarily focused on the wound recovery and restoration process and the current conditions of STE with various advancements and complexities associated with different strategies such as cell sources, biopolymers, innovative fabrication techniques, and growth factors delivery systems.
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Affiliation(s)
- Soumya Katiyar
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005 India
| | - Divakar Singh
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005 India
| | - Shikha Kumari
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005 India
| | - Pradeep Srivastava
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005 India
| | - Abha Mishra
- School of Biochemical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005 India
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13
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Dash BC, Korutla L, Vallabhajosyula P, Hsia HC. Unlocking the Potential of Induced Pluripotent Stem Cells for Wound Healing: The Next Frontier of Regenerative Medicine. Adv Wound Care (New Rochelle) 2022; 11:622-638. [PMID: 34155919 DOI: 10.1089/wound.2021.0049] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Significance: Nonhealing wounds are a significant burden for the health care system all over the world. Existing treatment options are not enough to promote healing, highlighting the urgent need for improved therapies. In addition, the current advancements in tissue-engineered skin constructs and stem cell-based therapies are facing significant hurdles due to the absence of a renewable source of functional cells. Recent Advances: Induced pluripotent stem cell technology (iPSC) is emerging as a novel tool to develop the next generation of personalized medicine for the treatment of chronic wounds. The iPSC provides unlimited access to various skin cells to generate complex personalized three-dimensional skin constructs for disease modeling and autologous grafts. Furthermore, the iPSC-based therapies can target distinct wound healing phases and have shown accelerating wound closure by enhancing angiogenesis, cell migration, tissue regeneration, and modulating inflammation. Critical Issues: Since the last decade, iPSC has been revolutionizing the field of wound healing and skin tissue engineering. Despite the current progress, safety and heterogeneity among iPSC lines are still major hurdles in addition to the lack of large animal studies. These challenges need to be addressed before translating an iPSC-based therapy to the clinic. Future Directions: Future considerations should be given to performing large animal studies to check the safety and efficiency of iPSC-based therapy in a wound healing setup. Furthermore, strategies should be developed to overcome variation between hiPSC lines, develop an efficient manufacturing process for iPSC-derived products, and generate complex skin constructs with vasculature and skin appendages.
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Affiliation(s)
- Biraja C Dash
- Department of Surgery (Plastic), Yale School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Laxminarayana Korutla
- Department of Surgery (Cardiac), Yale School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Prashanth Vallabhajosyula
- Department of Surgery (Cardiac), Yale School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Henry C Hsia
- Department of Surgery (Plastic), Yale School of Medicine, Yale University, New Haven, Connecticut, USA.,Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA
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14
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Sun W, Liu Z, Xu J, Cheng Y, Yin R, Ma L, Li H, Qian X, Zhang H. 3D skin models along with skin-on-a-chip systems: A critical review. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Shin GJE, Abaci HE, Smith MC. Cellular Pathogenesis of Chemotherapy-Induced Peripheral Neuropathy: Insights From Drosophila and Human-Engineered Skin Models. FRONTIERS IN PAIN RESEARCH 2022; 3:912977. [PMID: 35875478 PMCID: PMC9304629 DOI: 10.3389/fpain.2022.912977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/08/2022] [Indexed: 11/13/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a highly prevalent and complex condition arising from chemotherapy cancer treatments. Currently, there are no treatment or prevention options in the clinic. CIPN accompanies pain-related sensory functions starting from the hands and feet. Studies focusing on neurons in vitro and in vivo models significantly advanced our understanding of CIPN pathological mechanisms. However, given the direct toxicity shown in both neurons and non-neuronal cells, effective in vivo or in vitro models that allow the investigation of neurons in their local environment are required. No single model can provide a complete solution for the required investigation, therefore, utilizing a multi-model approach would allow complementary advantages of different models and robustly validate findings before further translation. This review aims first to summarize approaches and insights from CIPN in vivo models utilizing small model organisms. We will focus on Drosophila melanogaster CIPN models that are genetically amenable and accessible to study neuronal interactions with the local environment in vivo. Second, we will discuss how these findings could be tested in physiologically relevant vertebrate models. We will focus on in vitro approaches using human cells and summarize the current understanding of engineering approaches that may allow the investigation of pathological changes in neurons and the skin environment.
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Affiliation(s)
- Grace Ji-eun Shin
- Zuckerman Mind Brain and Behavior Institute, Jerome L. Greene Science Center, Columbia University, New York, NY, United States
- *Correspondence: Grace Ji-eun Shin
| | - Hasan Erbil Abaci
- Department of Dermatology, Columbia University Medical Center, Saint Nicholas Avenue, New York, NY, United States
| | - Madison Christine Smith
- Zuckerman Mind Brain and Behavior Institute, Jerome L. Greene Science Center, Columbia University, New York, NY, United States
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16
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Lee J, van der Valk WH, Serdy SA, Deakin C, Kim J, Le AP, Koehler KR. Generation and characterization of hair-bearing skin organoids from human pluripotent stem cells. Nat Protoc 2022; 17:1266-1305. [PMID: 35322210 PMCID: PMC10461778 DOI: 10.1038/s41596-022-00681-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 01/04/2022] [Indexed: 12/28/2022]
Abstract
Human skin uses millions of hairs and glands distributed across the body surface to function as an external barrier, thermoregulator and stimuli sensor. The large-scale generation of human skin with these appendages would be beneficial, but is challenging. Here, we describe a detailed protocol for generating hair-bearing skin tissue entirely from a homogeneous population of human pluripotent stem cells in a three-dimensional in vitro culture system. Defined culture conditions are used over a 2-week period to induce differentiation of pluripotent stem cells to surface ectoderm and cranial neural crest cells, which give rise to the epidermis and dermis, respectively, in each organoid unit. After 60 d of incubation, the skin organoids produce hair follicles. By day ~130, the skin organoids reach full complexity and contain stratified skin layers, pigmented hair follicles, sebaceous glands, Merkel cells and sensory neurons, recapitulating the cell composition and architecture of fetal skin tissue at week 18 of gestation. Skin organoids can be maintained in culture using this protocol for up to 150 d, enabling the organoids to be used to investigate basic skin biology, model disease and, further, reconstruct or regenerate skin tissue.
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Affiliation(s)
- Jiyoon Lee
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA.
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA.
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA.
- Department of Surgery, Harvard Medical School, Boston, MA, USA.
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA.
| | - Wouter H van der Valk
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA
- Department of Otorhinolaryngology and Head & Neck Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Sara A Serdy
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
| | - CiCi Deakin
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Department of Biological Engineering, Wentworth Institute of Technology, Boston, MA, USA
| | - Jin Kim
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA
| | - Anh Phuong Le
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA
| | - Karl R Koehler
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA.
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA.
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA.
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA.
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17
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Preferential stimulation of melanocytes by M2 macrophages to produce melanin through vascular endothelial growth factor. Sci Rep 2022; 12:6416. [PMID: 35440608 PMCID: PMC9019043 DOI: 10.1038/s41598-022-08163-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/24/2022] [Indexed: 02/07/2023] Open
Abstract
Post-inflammatory hyperpigmentation is a skin discoloration process that occurs following an inflammatory response or wound. As the skin begins to heal, macrophages first exhibit a proinflammatory phenotype (M1) during the early stages of tissue repair and then transition to a pro-healing, anti-inflammatory phenotype (M2) in later stages. During this process, M1 macrophages remove invading bacteria and M2 macrophages remodel surrounding tissue; however, the relationship between macrophages and pigmentation is unclear. In this study, we examined the effect of macrophages on melanin pigmentation using human induced pluripotent stem cells. Functional melanocytes were differentiated from human induced pluripotent stem cells and named as hiMels. The generated hiMels were then individually cocultured with M1 and M2 macrophages. Melanin synthesis decreased in hiMels cocultured with M1 macrophages but significantly increased in hiMels cocultured with M2 macrophages. Moreover, the expression of vascular endothelial growth factor was increased in M2 cocultured media. Our findings suggest that M2 macrophages, and not M1 macrophages, induce hyperpigmentation in scarred areas of the skin during tissue repair.
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18
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Zoio P, Oliva A. Skin-on-a-Chip Technology: Microengineering Physiologically Relevant In Vitro Skin Models. Pharmaceutics 2022; 14:pharmaceutics14030682. [PMID: 35336056 PMCID: PMC8955316 DOI: 10.3390/pharmaceutics14030682] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 02/06/2023] Open
Abstract
The increased demand for physiologically relevant in vitro human skin models for testing pharmaceutical drugs has led to significant advancements in skin engineering. One of the most promising approaches is the use of in vitro microfluidic systems to generate advanced skin models, commonly known as skin-on-a-chip (SoC) devices. These devices allow the simulation of key mechanical, functional and structural features of the human skin, better mimicking the native microenvironment. Importantly, contrary to conventional cell culture techniques, SoC devices can perfuse the skin tissue, either by the inclusion of perfusable lumens or by the use of microfluidic channels acting as engineered vasculature. Moreover, integrating sensors on the SoC device allows real-time, non-destructive monitoring of skin function and the effect of topically and systemically applied drugs. In this Review, the major challenges and key prerequisites for the creation of physiologically relevant SoC devices for drug testing are considered. Technical (e.g., SoC fabrication and sensor integration) and biological (e.g., cell sourcing and scaffold materials) aspects are discussed. Recent advancements in SoC devices are here presented, and their main achievements and drawbacks are compared and discussed. Finally, this review highlights the current challenges that need to be overcome for the clinical translation of SoC devices.
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Affiliation(s)
- Patrícia Zoio
- Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa, Avenida da República, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal;
| | - Abel Oliva
- Instituto de Tecnologia Química e Biológica (ITQB), Universidade Nova de Lisboa, Avenida da República, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal;
- Instituto de Biologia Experimental e Tecnológica (IBET), 2781-901 Oeiras, Portugal
- Correspondence:
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19
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Todorović V, McDonald HM, Hoover P, Wetter JB, Marinopoulos AE, Woody CL, Miller L, Finkielsztein A, Dunstan RW, Paller AS, Honore P, Getsios S, Scott VE. Cytokine Induced 3-D Organotypic Psoriasis Skin Model Demonstrates Distinct Roles for NF-κB and JAK Pathways in Disease Pathophysiology. Exp Dermatol 2022; 31:1036-1047. [PMID: 35213752 DOI: 10.1111/exd.14551] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/19/2022] [Accepted: 02/17/2022] [Indexed: 11/29/2022]
Abstract
Psoriasis vulgaris is an inflammatory skin disease that affects 2-3% of the population worldwide. One of the major challenges in discovering novel therapies is the poor translatability of animal models to human disease. Therefore, it is imperative to develop human preclinical models of psoriasis that are amenable to pharmacological intervention. Here we report a 3-D reconstituted human epidermis (RHE) culture system treated with cytokines commonly associated with psoriasis (TNFα, IL-17A and IL-22) that reproduced some key features of the human disease. The effects on epidermal morphology, gene transcription and cytokine production, which are dysregulated in psoriasis were assessed. Certain morphological features of psoriatic epidermis were evident in cytokine-stimulated RHEs, including hypogranulosis and parakeratosis. In addition, RHEs responded to a cytokine mix in a dose-dependent manner by expressing genes and proteins associated with impaired keratinocyte differentiation (keratin 10/K10, loricrin), innate immune responses (S100A7, DEFB4, elafin), and inflammation (IL-1α, IL-6, IL-8, IL-10, IL-12/23p40, IL-36γ, GM-CSF, and IFNγ) typical of psoriasis. These disease-relevant changes in morphology, gene transcription, and cytokine production were robustly attenuated by pharmacologically blocking TNFα/IL-17A-induced NF-κB activation with IKK-2 inhibitor IV. Conversely, inhibition of IL-22-induced JAK1 signaling with ABT-317 strongly attenuated morphological features of the disease but had no effect on NFκB-dependent cytokine production, suggesting distinct mechanisms of action by the cytokines driving psoriasis. These data support the use of cytokine-induced RHE models for identifying and targeting keratinocyte signaling pathways important for disease progression and may provide translational insights into novel keratinocyte mechanisms for novel psoriasis therapies.
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Affiliation(s)
| | | | - Paul Hoover
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | | | | | | | | | | | | | - Amy S Paller
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | | | - Spiro Getsios
- Department of Dermatology, Northwestern University, Chicago, IL, USA
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20
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Implementing organ-on-chip in a next-generation risk assessment of chemicals: a review. Arch Toxicol 2022; 96:711-741. [PMID: 35103818 PMCID: PMC8850248 DOI: 10.1007/s00204-022-03234-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 01/20/2022] [Indexed: 12/17/2022]
Abstract
Organ-on-chip (OoC) technology is full of engineering and biological challenges, but it has the potential to revolutionize the Next-Generation Risk Assessment of novel ingredients for consumer products and chemicals. A successful incorporation of OoC technology into the Next-Generation Risk Assessment toolbox depends on the robustness of the microfluidic devices and the organ tissue models used. Recent advances in standardized device manufacturing, organ tissue cultivation and growth protocols offer the ability to bridge the gaps towards the implementation of organ-on-chip technology. Next-Generation Risk Assessment is an exposure-led and hypothesis-driven tiered approach to risk assessment using detailed human exposure information and the application of appropriate new (non-animal) toxicological testing approaches. Organ-on-chip presents a promising in vitro approach by combining human cell culturing with dynamic microfluidics to improve physiological emulation. Here, we critically review commercial organ-on-chip devices, as well as recent tissue culture model studies of the skin, intestinal barrier and liver as the main metabolic organ to be used on-chip for Next-Generation Risk Assessment. Finally, microfluidically linked tissue combinations such as skin-liver and intestine-liver in organ-on-chip devices are reviewed as they form a relevant aspect for advancing toxicokinetic and toxicodynamic studies. We point to recent achievements and challenges to overcome, to advance non-animal, human-relevant safety studies.
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21
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Zarrintaj P, Saeb MR, Stadler FJ, Yazdi MK, Nezhad MN, Mohebbi S, Seidi F, Ganjali MR, Mozafari M. Human Organs-on-Chips: A Review of the State-of-the-Art, Current Prospects, and Future Challenges. Adv Biol (Weinh) 2021; 6:e2000526. [PMID: 34837667 DOI: 10.1002/adbi.202000526] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 08/03/2021] [Indexed: 01/09/2023]
Abstract
New emerging technologies, remarkably miniaturized 3D organ models and microfluidics, enable simulation of the real in vitro microenvironment ex vivo more closely. There are many fascinating features of innovative organ-on-a-chip (OOC) technology, including the possibility of integrating semipermeable and/or stretchable membranes, creating continuous perfusion of fluids into microchannels and chambers (while maintaining laminar flow regime), embedding microdevices like microsensors, microstimulators, micro heaters, or different cell lines, along with other 3D cell culture technologies. OOC systems are designed to imitate the structure and function of human organs, ranging from breathing lungs to beating hearts. This technology is expected to be able to revolutionize cell biology studies, personalized precision medicine, drug development process, and cancer diagnosis/treatment. OOC systems can significantly reduce the cost associated with tedious drug development processes and the risk of adverse drug reactions in the body, which makes drug screening more effective. The review mainly focus on presenting an overview of the several previously developed OOC systems accompanied by subjects relevant to pharmacy-, cancer-, and placenta-on-a-chip. The challenging issues and opportunities related to these systems are discussed, along with a future perspective for this technology.
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Affiliation(s)
- Payam Zarrintaj
- School of Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, OK, 74078, USA
| | - Mohammad Reza Saeb
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk, 80-233, Poland
| | - Florian J Stadler
- College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen, 518060, China
| | - Mohsen Khodadadi Yazdi
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, 1417466191, Iran
| | - Mojtaba Nasiri Nezhad
- Department of Chemical Engineering, Urmia University of Technology, Urmia, 57166-419, Iran
| | - Shabnam Mohebbi
- Department of Chemical Engineering, Tabriz University, Tabriz, 51335-1996, Iran
| | - Farzad Seidi
- Joint International Research Lab of Lignocellulosic Functional Materials, Nanjing Forestry University, Nanjing, 210037, China
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, 1417466191, Iran.,Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, 14395-1179, Iran
| | - Masoud Mozafari
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, 1449614535, Iran
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22
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Moon S, Kim DH, Shin JU. In Vitro Models Mimicking Immune Response in the Skin. Yonsei Med J 2021; 62:969-980. [PMID: 34672130 PMCID: PMC8542468 DOI: 10.3349/ymj.2021.62.11.969] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/16/2021] [Accepted: 09/24/2021] [Indexed: 12/31/2022] Open
Abstract
The skin is the first line of defense of our body, and it is composed of the epidermis and dermis with diverse immune cells. Various in vitro models have been investigated to recapitulate the immunological functions of the skin and to model inflammatory skin diseases. The simplest model is a two-dimensional (2D) co-culture system, which helps understand the direct and indirect cell-to-cell interactions between immune and structural cells; however, it has limitations when observing three-dimensional (3D) interactions or reproducing skin barriers. Conversely, 3D skin constructs can mimic the human skin characteristics in terms of epidermal and dermal structures, barrier functions, cell migration, and cell-to-cell interaction in the 3D space. Recently, as the importance of neuro-immune-cutaneous interactions in the inflammatory response is emerging, 3D skin constructs containing both immune cells and neurons are being developed. A microfluidic culture device called "skin-on-a-chip," which simulates the structures and functions of the human skin with perfusion, was also developed to mimic immune cell migration through the vascular system. This review summarizes the in vitro skin models with immune components, focusing on two highly prevalent chronic inflammatory skin diseases: atopic dermatitis and psoriasis. The development of these models will be valuable in studying the pathophysiology of skin diseases and evaluating the efficacy and toxicity of new drugs.
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Affiliation(s)
- Sujin Moon
- CHA University College of Medicine, Seongnam, Korea
| | - Dong Hyun Kim
- CHA University College of Medicine, Seongnam, Korea
- Department of Dermatology, CHA Bundang Medical Center, Seongnam, Korea
| | - Jung U Shin
- CHA University College of Medicine, Seongnam, Korea
- Department of Dermatology, CHA Bundang Medical Center, Seongnam, Korea.
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23
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Choudhury S, Surendran N, Das A. Recent advances in the induced pluripotent stem cell-based skin regeneration. Wound Repair Regen 2021; 29:697-710. [PMID: 33970525 DOI: 10.1111/wrr.12925] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/30/2021] [Accepted: 04/27/2021] [Indexed: 01/05/2023]
Abstract
Skin regeneration has been a challenging clinical problem especially in cases of chronic wounds such as diabetic foot ulcers, and epidermolysis bullosa-related skin blisters. Prolonged non-healing wounds often lead to bacterial infections increasing the severity of wounds. Current treatment strategies for chronic wounds include debridement of wounds along with antibiotics, growth factors, and stem cell transplantation therapies. However, the compromised nature of autologous stem cells in patients with comorbidities such as diabetes limits the efficacy of the therapy. The discovery of induced pluripotent stem cell (iPSC) technology has immensely influenced the field of regenerative therapy. Enormous efforts have been made to develop integration-free iPSCs suitable for clinical therapies. This review focuses on recent advances in the methods and reprogramming factors for generating iPSCs along with the existing challenges such as genetic alterations, tumorigenicity, immune rejection, and regulatory hurdles for the clinical application of iPSCs. Furthermore, this review also highlights the benefits of using iPSCs for the generation of skin cells and skin disease modeling over the existing clinical therapies for skin regeneration in chronic wounds and skin diseases.
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Affiliation(s)
- Subholakshmi Choudhury
- Department of Applied Biology, Council of Scientific & Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
- Academy of Science and Innovative Research (AcSIR), Ghaziabad, India
| | - Nidhi Surendran
- Department of Applied Biology, Council of Scientific & Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
| | - Amitava Das
- Department of Applied Biology, Council of Scientific & Industrial Research-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
- Academy of Science and Innovative Research (AcSIR), Ghaziabad, India
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24
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He J, Zhang X, Xia X, Han M, Li F, Li C, Li Y, Gao D. Organoid technology for tissue engineering. J Mol Cell Biol 2021; 12:569-579. [PMID: 32249317 PMCID: PMC7683016 DOI: 10.1093/jmcb/mjaa012] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 01/11/2020] [Accepted: 02/04/2020] [Indexed: 12/18/2022] Open
Abstract
For centuries, attempts have been continuously made to artificially reconstitute counterparts of in vivo organs from their tissues or cells. Only in the recent decade has organoid technology as a whole technological field systematically emerged and been shown to play important roles in tissue engineering. Based on their self-organizing capacities, stem cells of versatile organs, both harvested and induced, can form 3D structures that are structurally and functionally similar to their in vivo counterparts. These organoid models provide a powerful platform for elucidating the development mechanisms, modeling diseases, and screening drug candidates. In this review, we will summarize the advances of this technology for generating various organoids of tissues from the three germ layers and discuss their drawbacks and prospects for tissue engineering.
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Affiliation(s)
- Juan He
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiaoyu Zhang
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Xinyi Xia
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Ming Han
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Fei Li
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Chunfeng Li
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Yunguang Li
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Dong Gao
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China.,Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China
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25
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Grambow E, Sorg H, Sorg CGG, Strüder D. Experimental Models to Study Skin Wound Healing with a Focus on Angiogenesis. Med Sci (Basel) 2021; 9:medsci9030055. [PMID: 34449673 PMCID: PMC8395822 DOI: 10.3390/medsci9030055] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/16/2021] [Accepted: 08/18/2021] [Indexed: 12/11/2022] Open
Abstract
A large number of models are now available for the investigation of skin wound healing. These can be used to study the processes that take place in a phase-specific manner under both physiological and pathological conditions. Most models focus on wound closure, which is a crucial parameter for wound healing. However, vascular supply plays an equally important role and corresponding models for selective or parallel investigation of microcirculation regeneration and angiogenesis are also described. In this review article, we therefore focus on the different levels of investigation of skin wound healing (in vivo to in virtuo) and the investigation of angiogenesis and its parameters.
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Affiliation(s)
- Eberhard Grambow
- Department of General, Visceral, Thoracic, Vascular and Transplantation Surgery, Rostock University Medical Center, 18057 Rostock, Germany
- Correspondence:
| | - Heiko Sorg
- Department of Health, University of Witten/Herdecke, Alfred-Herrhausen-Str. 50, 58455 Witten, Germany;
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Klinikum Westfalen, Am Knappschaftskrankenhaus 1, 44309 Dortmund, Germany
| | - Christian G. G. Sorg
- Chair of Management and Innovation in Health Care, Department of Management and Entrepreneurship, Faculty of Management, Economics and Society, Witten/Herdecke University, Alfred-Herrhausen-Straße 50, 58455 Witten, Germany;
| | - Daniel Strüder
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery “Otto Körner”, Rostock University Medical Center, 18057 Rostock, Germany;
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26
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Sierra-Sánchez Á, Kim KH, Blasco-Morente G, Arias-Santiago S. Cellular human tissue-engineered skin substitutes investigated for deep and difficult to heal injuries. NPJ Regen Med 2021; 6:35. [PMID: 34140525 PMCID: PMC8211795 DOI: 10.1038/s41536-021-00144-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 05/25/2021] [Indexed: 02/05/2023] Open
Abstract
Wound healing is an important function of skin; however, after significant skin injury (burns) or in certain dermatological pathologies (chronic wounds), this important process can be deregulated or lost, resulting in severe complications. To avoid these, studies have focused on developing tissue-engineered skin substitutes (TESSs), which attempt to replace and regenerate the damaged skin. Autologous cultured epithelial substitutes (CESs) constituted of keratinocytes, allogeneic cultured dermal substitutes (CDSs) composed of biomaterials and fibroblasts and autologous composite skin substitutes (CSSs) comprised of biomaterials, keratinocytes and fibroblasts, have been the most studied clinical TESSs, reporting positive results for different pathological conditions. However, researchers' purpose is to develop TESSs that resemble in a better way the human skin and its wound healing process. For this reason, they have also evaluated at preclinical level the incorporation of other human cell types such as melanocytes, Merkel and Langerhans cells, skin stem cells (SSCs), induced pluripotent stem cells (iPSCs) or mesenchymal stem cells (MSCs). Among these, MSCs have been also reported in clinical studies with hopeful results. Future perspectives in the field of human-TESSs are focused on improving in vivo animal models, incorporating immune cells, designing specific niches inside the biomaterials to increase stem cell potential and developing three-dimensional bioprinting strategies, with the final purpose of increasing patient's health care. In this review we summarize the use of different human cell populations for preclinical and clinical TESSs under research, remarking their strengths and limitations and discuss the future perspectives, which could be useful for wound healing purposes.
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Affiliation(s)
- Álvaro Sierra-Sánchez
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, Andalusian Network of Design and Translation of Advanced Therapies, Granada, Spain.
- Biosanitary Institute of Granada (ibs.GRANADA), Granada, Spain.
| | - Kevin H Kim
- Department of Dermatology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
| | - Gonzalo Blasco-Morente
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
| | - Salvador Arias-Santiago
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, Andalusian Network of Design and Translation of Advanced Therapies, Granada, Spain
- Biosanitary Institute of Granada (ibs.GRANADA), Granada, Spain
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
- Department of Dermatology, Faculty of Medicine, University of Granada, Granada, Spain
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27
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Khurana P, Kolundzic N, Flohr C, Ilic D. Human pluripotent stem cells: An alternative for 3D in vitro modelling of skin disease. Exp Dermatol 2021; 30:1572-1587. [PMID: 33864704 DOI: 10.1111/exd.14358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/15/2021] [Accepted: 04/05/2021] [Indexed: 01/05/2023]
Abstract
To effectively study the skin and its pathology, various platforms have been used to date, with in vitro 3D skin models being considered the future gold standard. These models have generally been engineered from primary cell lines. However, their short life span leading to the use of various donors, imposes issues with genetic variation. Human pluripotent stem cell (hPSC)-technology holds great prospects as an alternative to the use of primary cell lines to study the pathophysiology of human skin diseases. This is due to their potential to generate an unlimited number of genetically identical skin models that closely mimic the complexity of in vivo human skin. During the past decade, researchers have therefore started to use human embryonic and induced pluripotent stem cells (hESC/iPSC) to derive skin resident-like cells and components. These have subsequently been used to engineer hPSC-derived 3D skin models. In this review, we focus on the advantages, recent developments, and future perspectives in using hPSCs as an alternative cell source for modelling human skin diseases in vitro.
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Affiliation(s)
- Preeti Khurana
- Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,Assisted Conception Unit, Guy's Hospital, London, UK
| | - Nikola Kolundzic
- Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,Assisted Conception Unit, Guy's Hospital, London, UK
| | - Carsten Flohr
- St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Dusko Ilic
- Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.,Assisted Conception Unit, Guy's Hospital, London, UK
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28
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Fritsche E, Haarmann-Stemmann T, Kapr J, Galanjuk S, Hartmann J, Mertens PR, Kämpfer AAM, Schins RPF, Tigges J, Koch K. Stem Cells for Next Level Toxicity Testing in the 21st Century. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006252. [PMID: 33354870 DOI: 10.1002/smll.202006252] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/13/2020] [Indexed: 06/12/2023]
Abstract
The call for a paradigm change in toxicology from the United States National Research Council in 2007 initiates awareness for the invention and use of human-relevant alternative methods for toxicological hazard assessment. Simple 2D in vitro systems may serve as first screening tools, however, recent developments infer the need for more complex, multicellular organotypic models, which are superior in mimicking the complexity of human organs. In this review article most critical organs for toxicity assessment, i.e., skin, brain, thyroid system, lung, heart, liver, kidney, and intestine are discussed with regards to their functions in health and disease. Embracing the manifold modes-of-action how xenobiotic compounds can interfere with physiological organ functions and cause toxicity, the need for translation of such multifaceted organ features into the dish seems obvious. Currently used in vitro methods for toxicological applications and ongoing developments not yet arrived in toxicity testing are discussed, especially highlighting the potential of models based on embryonic stem cells and induced pluripotent stem cells of human origin. Finally, the application of innovative technologies like organs-on-a-chip and genome editing point toward a toxicological paradigm change moves into action.
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Affiliation(s)
- Ellen Fritsche
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
- Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, 40225, Germany
| | | | - Julia Kapr
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Saskia Galanjuk
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Julia Hartmann
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Peter R Mertens
- Department of Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke-University Magdeburg, Magdeburg, 39106, Germany
| | - Angela A M Kämpfer
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Roel P F Schins
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Julia Tigges
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
| | - Katharina Koch
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, 40225, Germany
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29
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Lee J, Koehler KR. Skin organoids: A new human model for developmental and translational research. Exp Dermatol 2021; 30:613-620. [PMID: 33507537 DOI: 10.1111/exd.14292] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/31/2020] [Accepted: 01/24/2021] [Indexed: 12/12/2022]
Abstract
Culturing skin cells outside of the body has been a cornerstone of dermatological investigation for many years; however, human skin equivalent systems typically lack the full complexity of native skin. Notably, skin appendages, such as hair follicles and sweat glands, remain a challenge to generate or maintain in cell cultures and reconstruct in damaged skin. Recent work from our lab has demonstrated methods for generating appendage-bearing skin tissue-known as skin organoids-from pluripotent stem cells. Here, we will summarize this work and other related works, and then discuss the potential future applications of skin organoids in dermatological research.
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Affiliation(s)
- Jiyoon Lee
- Department of Otolaryngology, Boston Children's Hospital, Boston, Massachusetts, USA.,F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Karl R Koehler
- Department of Otolaryngology, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, Massachusetts, USA.,F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, USA
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30
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Schneider M, Ziemer M, Lethaus B, Simon JC, Savkovic V. Generation of pigmented skin grafts from human hair follicles and dermal fibroblasts. Tissue Eng Part A 2021; 27:1333-1342. [PMID: 33573455 DOI: 10.1089/ten.tea.2020.0284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Skin equivalents are able to mimic key features of human skin and they can be used for a very broad range of applications, such as fundamental studies of skin biology, disease and toxicological models, as well as an alternative for animal testing. The high end of their use is in therapy of wound healing and repigmentation, disorders that massively affect individual health as well as quality of life and pose considerable burden to healthcare systems worldwide. Tissue-engineered skin grafts often originate from invasively obtained cell material (i.e. biopsy). Hereby, an unmet need for non-invasively gained autologous biological starting material has been created. The hair follicle, entirely non-invasively available by plucking, harbors a heterogeneous cell pool including stem cells with an immense differentiation capacity, hereby representing an attractive source of cells, especially for purposes of regenerative medicine. In this study, we engineered three-dimensional pigmented epidermal and dermoepidermal grafts using human keratinocytes and melanocytes from the outer root sheath of hair follicles combined with dermal fibroblasts. The grafts were generally anatomically correct and functional regarding stratification, formation of epidermal melanin units as well as extracellular matrix deposition, exhibiting moderate differences to the skin anatomy and function, typical for the in vitro culture.
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Affiliation(s)
- Marie Schneider
- Leipzig University, Saxon Incubator for Clinical Translation; Phillip-Rosenthal-Str. 55, Leipzig, Sachsen, Germany.,Leipzig University, Dept.of Hematology, Cell Therapy and Hemostaseology, University Hospital Leipzig, Liebigstr. 22 , 04103 Leipzig, Saxony, Germany;
| | - Mirjana Ziemer
- Leipzig University, Dept. of Dermatology, Venerology and Allergology, University Hospital Leipzig, Phillip-Rosenthal-Str. 23, Haus 10, Leipzig, Sachsen, Germany;
| | - Bernd Lethaus
- Leipzig University, Dept. of Cranio-Maxillofacial Surgery, University Hospital Leipzig, Liebigstr. 12, Leipzig, Sachsen, Germany;
| | - Jan Christoph Simon
- Leipzig University, 9180, Dept. of Dermatology, Venerology and Allergology, University Hospital Leipzig, Phillip-Rosenthal-Str. 23, Haus 10, Leipzig, Sachsen, Germany;
| | - Vuk Savkovic
- Leipzig University, Dept. of Cranio-Maxillofacial Surgery, Leipzig University Hospital, Liebigstr. 12, Leipzig, Sachsen, Germany;
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31
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Ejiugwo M, Rochev Y, Gethin G, O'Connor G. Toward Developing Immunocompetent Diabetic Foot Ulcer-on-a-Chip Models for Drug Testing. Tissue Eng Part C Methods 2021; 27:77-88. [PMID: 33406980 DOI: 10.1089/ten.tec.2020.0331] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Bioengineering of skin has been significantly explored, ranging from the use of traditional cell culture systems to the most recent organ-on-a-chip (OoC) technology that permits skin modeling on physiological scales among other benefits. This article presents key considerations for developing physiologically relevant immunocompetent diabetic foot ulcer (DFU) models. Diabetic foot ulceration affects hundreds of millions of individuals globally, especially the elderly, and constitutes a major socioeconomic burden. When DFUs are not treated and managed in a timely manner, 15-50% of patients tend to undergo partial or complete amputation of the affected limb. Consequently, at least 40% of such patients die within 5 years postamputation. Currently, therapeutic strategies are actively sought and developed. However, present-day preclinical platforms (animals and in vitro models) are not robust enough to provide reliable data for clinical trials. Insights from published works on immunocompetent skin-on-a-chip models and bioengineering considerations, presented in this article, can inform researchers on how to develop robust OoC models for testing topical therapies such as growth factor-based therapies for DFUs. We propose that immunocompetent DFU-on-a-chip models should be bioengineered using diseased cells derived from individuals; in particular, the pathophysiological contribution of macrophages in diabetic wound healing, along with the typical fibroblasts and keratinocytes, needs to be recapitulated. The ideal model should consist of the following components: diseased cells embedded in reproducible scaffolds, which permit endogenous "diseased" extracellular matrix deposition, and the integration of the derived immunocompetent DFU model onto a microfluidic platform. The proposed DFU platforms will eventually facilitate reliable and robust drug testing of wound healing therapeutics, coupled with reduced clinical trial failure rates. Impact statement Current animal and cell-based systems are not physiologically relevant enough to retrieve reliable results for clinical translation of diabetic foot ulcer (DFU) therapies. Organ-on-a-chip (OoC) technology offers desirable features that could finally enable the vision of modeling DFU for pathophysiological studies and drug testing at a microscale. This article brings together the significant recent findings relevant to developing a minimally functional immunocompetent DFU-on-a-chip model, as wound healing cannot occur without a proper functioning immune response. It looks feasible in the future to recapitulate the stagnant inflammation in DFU (thought to impede wound healing) using OoC, diseased cells, and an endogenously produced extracellular matrix.
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Affiliation(s)
- Mirella Ejiugwo
- SFI CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway City, Ireland.,School of Physics, and National University of Ireland Galway, Galway City, Ireland
| | - Yury Rochev
- SFI CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway City, Ireland.,School of Physics, and National University of Ireland Galway, Galway City, Ireland
| | - Georgina Gethin
- SFI CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway City, Ireland.,School of Nursing and Midwifery, National University of Ireland Galway, Galway City, Ireland
| | - Gerard O'Connor
- SFI CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway City, Ireland.,School of Physics, and National University of Ireland Galway, Galway City, Ireland
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32
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Hennies HC, Poumay Y. Skin Disease Models In Vitro and Inflammatory Mechanisms: Predictability for Drug Development. Handb Exp Pharmacol 2021; 265:187-218. [PMID: 33387068 DOI: 10.1007/164_2020_428] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Investigative skin biology, analysis of human skin diseases, and numerous clinical and pharmaceutical applications rely on skin models characterized by reproducibility and predictability. Traditionally, such models include animal models, mainly rodents, and cellular models. While animal models are highly useful in many studies, they are being replaced by human cellular models in more and more approaches amid recent technological development due to ethical considerations. The culture of keratinocytes and fibroblasts has been used in cell biology for many years. However, only the development of co-culture and three-dimensional epidermis and full-skin models have fundamentally contributed to our understanding of cell-cell interaction and cell signalling in the skin, keratinocyte adhesion and differentiation, and mechanisms of skin barrier function. The modelling of skin diseases has highlighted properties of the skin important for its integrity and cutaneous development. Examples of monogenic as well as complex diseases including atopic dermatitis and psoriasis have demonstrated the role of skin models to identify pathomechanisms and drug targets. Recent investigations have indicated that 3D skin models are well suitable for drug testing and preclinical studies of topical therapies. The analysis of skin diseases has recognized the importance of inflammatory mechanisms and immune responses and thus other cell types such as dendritic cells and T cells in the skin. Current developments include the production of more complete skin models comprising a range of different cell types. Organ models and even multi-organ systems are being developed for the analysis of higher levels of cellular interaction and drug responses and are among the most recent innovations in skin modelling. They promise improved robustness and flexibility and aim at a body-on-a-chip solution for comprehensive pharmaceutical in vitro studies.
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Affiliation(s)
- Hans Christian Hennies
- Department of Biological and Geographical Sciences, University of Huddersfield, Huddersfield, UK. .,Cologne Center for Genomics, University Hospital Cologne, Cologne, Germany.
| | - Yves Poumay
- Faculty of Medicine, Namur Research Institute for Life Sciences, University of Namur, Namur, Belgium
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33
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Benito-Martínez S, Zhu Y, Jani RA, Harper DC, Marks MS, Delevoye C. Research Techniques Made Simple: Cell Biology Methods for the Analysis of Pigmentation. J Invest Dermatol 2020; 140:257-268.e8. [PMID: 31980058 DOI: 10.1016/j.jid.2019.12.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/27/2019] [Accepted: 12/05/2019] [Indexed: 12/11/2022]
Abstract
Pigmentation of the skin and hair represents the result of melanin biosynthesis within melanosomes of epidermal melanocytes, followed by the transfer of mature melanin granules to adjacent keratinocytes within the basal layer of the epidermis. Natural variation in these processes produces the diversity of skin and hair color among human populations, and defects in these processes lead to diseases such as oculocutaneous albinism. While genetic regulators of pigmentation have been well studied in human and animal models, we are still learning much about the cell biological features that regulate melanogenesis, melanosome maturation, and melanosome motility in melanocytes, and have barely scratched the surface in our understanding of melanin transfer from melanocytes to keratinocytes. Herein, we describe cultured cell model systems and common assays that have been used by investigators to dissect these features and that will hopefully lead to additional advances in the future.
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Affiliation(s)
- Silvia Benito-Martínez
- Structure and Membrane Compartments, Institut Curie, Paris Sciences & Lettres Research University, Centre National de la Recherche Scientifique, Paris, France
| | - Yueyao Zhu
- Department of Biology Graduate Program, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA; Department of Pathology and Laboratory Medicine and Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Riddhi Atul Jani
- Structure and Membrane Compartments, Institut Curie, Paris Sciences & Lettres Research University, Centre National de la Recherche Scientifique, Paris, France
| | - Dawn C Harper
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Michael S Marks
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA; Department of Pathology and Laboratory Medicine and Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Cédric Delevoye
- Structure and Membrane Compartments, Institut Curie, Paris Sciences & Lettres Research University, Centre National de la Recherche Scientifique, Paris, France.
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34
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Deal HE, Brown AC, Daniele MA. Microphysiological systems for the modeling of wound healing and evaluation of pro-healing therapies. J Mater Chem B 2020; 8:7062-7075. [PMID: 32756718 PMCID: PMC7460719 DOI: 10.1039/d0tb00544d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Wound healing is a multivariate process involving the coordinated response of numerous proteins and cell types. Accordingly, biomedical research has seen an increased adoption of the use of in vitro wound healing assays with complexity beyond that offered by traditional well-plate constructs. These microphysiological systems (MPS) seek to recapitulate one or more physiological features of the in vivo microenvironment, while retaining the analytical capacity of more reductionist assays. Design efforts to achieve relevant wound healing physiology include the use of dynamic perfusion over static culture, the incorporation of multiple cell types, the arrangement of cells in three dimensions, the addition of biomechanically and biochemically relevant hydrogels, and combinations thereof. This review provides a brief overview of the wound healing process and in vivo assays, and we critically review the current state of MPS and supporting technologies for modelling and studying wound healing. We distinguish between MPS that seek to inform a particular phase of wound healing, and constructs that have the potential to inform multiple phases of wound healing. This distinction is a product of whether analysis of a particular process is prioritized, or a particular physiology is prioritized, during design. Material selection is emphasized throughout, and relevant fabrication techniques discussed.
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Affiliation(s)
- Halston E Deal
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina, Chapel Hill, 911 Oval Dr., Raleigh, NC 27695, USA. and Comparative Medicine Institute, North Carolina State University, 1060 William Moore Dr., Raleigh, NC 27606, USA
| | - Ashley C Brown
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina, Chapel Hill, 911 Oval Dr., Raleigh, NC 27695, USA. and Comparative Medicine Institute, North Carolina State University, 1060 William Moore Dr., Raleigh, NC 27606, USA
| | - Michael A Daniele
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina, Chapel Hill, 911 Oval Dr., Raleigh, NC 27695, USA. and Comparative Medicine Institute, North Carolina State University, 1060 William Moore Dr., Raleigh, NC 27606, USA and Department of Electrical & Computer Engineering, North Carolina State University, 890 Oval Dr., Raleigh, NC 27695, USA
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35
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Przekora A. A Concise Review on Tissue Engineered Artificial Skin Grafts for Chronic Wound Treatment: Can We Reconstruct Functional Skin Tissue In Vitro? Cells 2020; 9:cells9071622. [PMID: 32640572 PMCID: PMC7407512 DOI: 10.3390/cells9071622] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/17/2020] [Accepted: 06/21/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic wounds occur as a consequence of a prolonged inflammatory phase during the healing process, which precludes skin regeneration. Typical treatment for chronic wounds includes application of autografts, allografts collected from cadaver, and topical delivery of antioxidant, anti-inflammatory, and antibacterial agents. Nevertheless, the mentioned therapies are not sufficient for extensive or deep wounds. Moreover, application of allogeneic skin grafts carries high risk of rejection and treatment failure. Advanced therapies for chronic wounds involve application of bioengineered artificial skin substitutes to overcome graft rejection as well as topical delivery of mesenchymal stem cells to reduce inflammation and accelerate the healing process. This review focuses on the concept of skin tissue engineering, which is a modern approach to chronic wound treatment. The aim of the article is to summarize common therapies for chronic wounds and recent achievements in the development of bioengineered artificial skin constructs, including analysis of biomaterials and cells widely used for skin graft production. This review also presents attempts to reconstruct nerves, pigmentation, and skin appendages (hair follicles, sweat glands) using artificial skin grafts as well as recent trends in the engineering of biomaterials, aiming to produce nanocomposite skin substitutes (nanofilled polymer composites) with controlled antibacterial activity. Finally, the article describes the composition, advantages, and limitations of both newly developed and commercially available bioengineered skin substitutes.
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Affiliation(s)
- Agata Przekora
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
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36
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Caruso G, Musso N, Grasso M, Costantino A, Lazzarino G, Tascedda F, Gulisano M, Lunte SM, Caraci F. Microfluidics as a Novel Tool for Biological and Toxicological Assays in Drug Discovery Processes: Focus on Microchip Electrophoresis. MICROMACHINES 2020; 11:E593. [PMID: 32549277 PMCID: PMC7344675 DOI: 10.3390/mi11060593] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/04/2020] [Accepted: 06/10/2020] [Indexed: 02/07/2023]
Abstract
The last decades of biological, toxicological, and pharmacological research have deeply changed the way researchers select the most appropriate 'pre-clinical model'. The absence of relevant animal models for many human diseases, as well as the inaccurate prognosis coming from 'conventional' pre-clinical models, are among the major reasons of the failures observed in clinical trials. This evidence has pushed several research groups to move more often from a classic cellular or animal modeling approach to an alternative and broader vision that includes the involvement of microfluidic-based technologies. The use of microfluidic devices offers several benefits including fast analysis times, high sensitivity and reproducibility, the ability to quantitate multiple chemical species, and the simulation of cellular response mimicking the closest human in vivo milieu. Therefore, they represent a useful way to study drug-organ interactions and related safety and toxicity, and to model organ development and various pathologies 'in a dish'. The present review will address the applicability of microfluidic-based technologies in different systems (2D and 3D). We will focus our attention on applications of microchip electrophoresis (ME) to biological and toxicological studies as well as in drug discovery and development processes. These include high-throughput single-cell gene expression profiling, simultaneous determination of antioxidants and reactive oxygen and nitrogen species, DNA analysis, and sensitive determination of neurotransmitters in biological fluids. We will discuss new data obtained by ME coupled to laser-induced fluorescence (ME-LIF) and electrochemical detection (ME-EC) regarding the production and degradation of nitric oxide, a fundamental signaling molecule regulating virtually every critical cellular function. Finally, the integration of microfluidics with recent innovative technologies-such as organoids, organ-on-chip, and 3D printing-for the design of new in vitro experimental devices will be presented with a specific attention to drug development applications. This 'composite' review highlights the potential impact of 2D and 3D microfluidic systems as a fast, inexpensive, and highly sensitive tool for high-throughput drug screening and preclinical toxicological studies.
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Affiliation(s)
- Giuseppe Caruso
- Oasi Research Institute—IRCCS, 94018 Troina (EN), Italy; (M.G.); (F.C.)
| | - Nicolò Musso
- Department of Biomedical and Biotechnological Sciences (BIOMETEC), University of Catania, 95125 Catania, Italy; (N.M.); (G.L.)
| | - Margherita Grasso
- Oasi Research Institute—IRCCS, 94018 Troina (EN), Italy; (M.G.); (F.C.)
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy; (A.C.); (M.G.)
| | - Angelita Costantino
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy; (A.C.); (M.G.)
| | - Giuseppe Lazzarino
- Department of Biomedical and Biotechnological Sciences (BIOMETEC), University of Catania, 95125 Catania, Italy; (N.M.); (G.L.)
| | - Fabio Tascedda
- Department of Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy;
- Center for Neuroscience and Neurotechnology, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Massimo Gulisano
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy; (A.C.); (M.G.)
- Molecular Preclinical and Translational Imaging Research Centre-IMPRonTE, University of Catania, 95125 Catania, Italy
- Interuniversity Consortium for Biotechnology, Area di Ricerca, Padriciano, 34149 Trieste, Italy
| | - Susan M. Lunte
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA;
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA
- Department of Chemistry, University of Kansas, Lawrence, KS 66047-1620, USA
| | - Filippo Caraci
- Oasi Research Institute—IRCCS, 94018 Troina (EN), Italy; (M.G.); (F.C.)
- Department of Drug Sciences, University of Catania, 95125 Catania, Italy; (A.C.); (M.G.)
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Zurina IM, Gorkun AA, Dzhussoeva EV, Kolokoltsova TD, Markov DD, Kosheleva NV, Morozov SG, Saburina IN. Human Melanocyte-Derived Spheroids: A Precise Test System for Drug Screening and a Multicellular Unit for Tissue Engineering. Front Bioeng Biotechnol 2020; 8:540. [PMID: 32582665 PMCID: PMC7287162 DOI: 10.3389/fbioe.2020.00540] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 05/05/2020] [Indexed: 12/14/2022] Open
Abstract
Pigmentation is the result of melanin synthesis, which takes place in melanocytes, and its further distribution. A dysregulation in melanocytes' functionality can result in the loss of pigmentation, the appearance of pigment spots and melanoma development. Tissue engineering and the screening of new skin-lightening drugs require the development of simple and reproducible in vitro models with maintained functional activity. The aim of the study was to obtain and characterize spheroids from normal human melanocytes as a three-dimensional multicellular structure and as a test system for skin-lightening drug screening. Melanocytes are known to lose their ability to synthesize melanin in monolayer culture. When transferred under non-adhesive conditions in agarose multi-well plates, melanocytes aggregated and formed spheroids. As a result, the amount of melanin elevated almost two times within seven days. MelanoDerm™ (MatTek) skin equivalents were used as a comparison system. Cells in spheroids expressed transcription factors that regulate melanogenesis: MITF and Sox10, the marker of developed melanosomes-gp100, as well as tyrosinase (TYR)-the melanogenesis enzyme and melanocortin receptor 1 (MC1R)-the main receptor regulating melanin synthesis. Expression was maintained during 3D culturing. Thus, it can be stated that spheroids maintain melanocytes' functional activity compared to that in the multi-layered MelanoDerm™ skin equivalents. Culturing both spheroids and MelanoDerm™ for seven days in the presence of the skin-lightening agent fucoxanthin resulted in a more significant lowering of melanin levels in spheroids. Significant down-regulation of gp100, MITF, and Sox10 transcription factors, as well as 10-fold down-regulation of TYR expression, was observed in spheroids by day 7 in the presence of fucoxanthin, thus inhibiting the maturation of melanosomes and the synthesis of melanin. MelanoDerm™ samples were characterized by significant down-regulation of only MITF, Sox10 indicating that spheroids formed a more sensitive system allowed for quantitative assays. Collectively, these data illustrate that normal melanocytes can assemble themselves into spheroids-the viable structures that are able to accumulate melanin and maintain the initial functional activity of melanocytes. These spheroids can be used as a more affordable and easy-to-use test system than commercial skin equivalents for drug screening.
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Affiliation(s)
- Irina M Zurina
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia.,Department of Modern Biomaterials, Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, Moscow, Russia.,FSBEI FPE Russian Medical Academy of Continuous Professional Education of the Russian Ministry of Healthcare, Moscow, Russia
| | - Anastasiya A Gorkun
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia.,Department of Modern Biomaterials, Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, Moscow, Russia.,FSBEI FPE Russian Medical Academy of Continuous Professional Education of the Russian Ministry of Healthcare, Moscow, Russia
| | - Ekaterina V Dzhussoeva
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Tamara D Kolokoltsova
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia.,FSBEI FPE Russian Medical Academy of Continuous Professional Education of the Russian Ministry of Healthcare, Moscow, Russia
| | - Dmitriy D Markov
- Institute of Molecular Genetics of the Russian Academy of Sciences, Moscow, Russia
| | - Nastasia V Kosheleva
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia.,FSBEI FPE Russian Medical Academy of Continuous Professional Education of the Russian Ministry of Healthcare, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Sergey G Morozov
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Irina N Saburina
- Laboratory of Cell Biology and Developmental Pathology, FSBSI Institute of General Pathology and Pathophysiology, Moscow, Russia.,FSBEI FPE Russian Medical Academy of Continuous Professional Education of the Russian Ministry of Healthcare, Moscow, Russia
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38
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Lee J, Rabbani CC, Gao H, Steinhart MR, Woodruff BM, Pflum ZE, Kim A, Heller S, Liu Y, Shipchandler TZ, Koehler KR. Hair-bearing human skin generated entirely from pluripotent stem cells. Nature 2020; 582:399-404. [PMID: 32494013 PMCID: PMC7593871 DOI: 10.1038/s41586-020-2352-3] [Citation(s) in RCA: 200] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/29/2020] [Indexed: 12/19/2022]
Abstract
The skin is a multi-layered organ equipped with appendages (i.e. follicles and glands) critical for regulating bodily fluid retention and temperature, guarding against external stresses, and mediating touch and pain sensation1,2. Reconstruction of appendage-bearing skin in cultures and in bioengineered grafts remains an unmet biomedical challenge3–9. Here, we report an organoid culture system that generates complex skin from human pluripotent stem cells. We use step-wise modulation of the TGFβ and FGF signalling pathways to co-induce cranial epithelial cells and neural crest cells within a spherical cell aggregate. During 4–5 months incubation, we observe the emergence of a cyst-like skin organoid composed of stratified epidermis, fat-rich dermis, and pigmented hair follicles equipped with sebaceous glands. A network of sensory neurons and Schwann cells form nerve-like bundles that target Merkel cells in organoid hair follicles, mimicking human touch circuitry. Single-cell RNA-sequencing and direct comparison to foetal specimens suggest that skin organoids are equivalent to human facial skin in the second-trimester of development. Moreover, we show that skin organoids form planar hair-bearing skin when grafted on nude mice. Together, our results demonstrate that nearly complete skin can self-assemble in vitro and be used to reconstitute skin in vivo. We anticipate skin organoids will be foundational to future studies of human skin development, disease modelling, or reconstructive surgery.
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Affiliation(s)
- Jiyoon Lee
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA.,F. M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA
| | - Cyrus C Rabbani
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Hongyu Gao
- Center for Medical Genomics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Matthew R Steinhart
- F. M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA.,Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Medical Neuroscience Graduate Program, Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Zachary E Pflum
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alexander Kim
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Stefan Heller
- Department of Otolaryngology, Stanford University, Palo Alto, CA, USA
| | - Yunlong Liu
- Center for Medical Genomics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Taha Z Shipchandler
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Karl R Koehler
- Department of Otolaryngology, Boston Children's Hospital, Boston, MA, USA. .,F. M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, USA. .,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, USA. .,Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA. .,Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA. .,Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA. .,Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, USA.
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Sharma A, Sances S, Workman MJ, Svendsen CN. Multi-lineage Human iPSC-Derived Platforms for Disease Modeling and Drug Discovery. Cell Stem Cell 2020; 26:309-329. [PMID: 32142662 PMCID: PMC7159985 DOI: 10.1016/j.stem.2020.02.011] [Citation(s) in RCA: 163] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Human induced pluripotent stem cells (hiPSCs) provide a powerful platform for disease modeling and have unlocked new possibilities for understanding the mechanisms governing human biology, physiology, and genetics. However, hiPSC-derivatives have traditionally been utilized in two-dimensional monocultures, in contrast to the multi-systemic interactions that influence cells in the body. We will discuss recent advances in generating more complex hiPSC-based systems using three-dimensional organoids, tissue-engineering, microfluidic organ-chips, and humanized animal systems. While hiPSC differentiation still requires optimization, these next-generation multi-lineage technologies can augment the biomedical researcher's toolkit and enable more realistic models of human tissue function.
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Affiliation(s)
- Arun Sharma
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA; Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Samuel Sances
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Michael J Workman
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Clive N Svendsen
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA.
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40
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Shin JU, Abaci HE, Herron L, Guo Z, Sallee B, Pappalardo A, Jackow J, Wang EHC, Doucet Y, Christiano AM. Recapitulating T cell infiltration in 3D psoriatic skin models for patient-specific drug testing. Sci Rep 2020; 10:4123. [PMID: 32139717 PMCID: PMC7057979 DOI: 10.1038/s41598-020-60275-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 02/05/2020] [Indexed: 12/31/2022] Open
Abstract
Drug screening studies for inflammatory skin diseases are currently performed using model systems that only partially recapitulate human diseased skin. Here, we developed a new strategy to incorporate T cells into human 3D skin constructs (HSCs), which enabled us to closely monitor and quantitate T cell responses. We found that the epidermis promotes the activation and infiltration of T cells into the skin, and provides a directional cue for their selective migration towards the epidermis. We established a psoriatic HSC (pHSC) by incorporating polarized Th1/Th17 cells or CCR6+CLA+ T cells derived from psoriasis patients into the constructs. These pHSCs showed a psoriatic epidermal phenotype and characteristic cytokine profiles, and responded to various classes of psoriasis drugs, highlighting the potential utility of our model as a drug screening platform. Taken together, we developed an advanced immunocompetent 3D skin model to investigate epidermal-T cell interactions and to understand the pathophysiology of inflammatory skin diseases in a human-relevant and patient-specific context.
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Affiliation(s)
- Jung U Shin
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
- Department of Dermatology, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Hasan E Abaci
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA.
| | - Lauren Herron
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Zongyou Guo
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Brigitte Sallee
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Alberto Pappalardo
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Joanna Jackow
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Eddy Hsi Chun Wang
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Yanne Doucet
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA
| | - Angela M Christiano
- Department of Dermatology, Columbia University Medical Center, NY, New York, USA.
- Department of Genetics & Development, Columbia University, New York, NY, USA.
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41
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Thélu A, Catoire S, Kerdine-Römer S. Immune-competent in vitro co-culture models as an approach for skin sensitisation assessment. Toxicol In Vitro 2020; 62:104691. [DOI: 10.1016/j.tiv.2019.104691] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 10/05/2019] [Accepted: 10/14/2019] [Indexed: 12/21/2022]
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[Use of 2D and 3D cell cultures in dermatology]. Hautarzt 2020; 71:91-100. [PMID: 31965205 DOI: 10.1007/s00105-019-04537-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The skin is a complex organ that performs a number of vital functions, including forming a physical barrier that protects our body from the penetration of pathogens and irritants and from excessive transepidermal water loss. In addition to its passive properties, the skin is also actively involved in the immune process. A complex structure of different cell types and structures allows the skin to fulfil these functions. In vitro research often faces the problem that simple 2D cell cultures are not able to adequately map these functions. Here 3D skin models offer a possible solution. In recent years, there has been significant development in this field; the reproducibility of the method as well as the physiological structure and tissue architecture of the 3D skin models have been improved. Depending on the research question, protocols for 3D skin models have been published, ranging from simple multilayer epidermis models to highly complex vascularized 3D full skin models.
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43
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The Role of Adipose-Derived Stem Cells, Dermal Regenerative Templates, and Platelet-Rich Plasma in Tissue Engineering-Based Treatments of Chronic Skin Wounds. Stem Cells Int 2020; 2020:7056261. [PMID: 32399048 PMCID: PMC7199611 DOI: 10.1155/2020/7056261] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 11/29/2019] [Indexed: 12/12/2022] Open
Abstract
The continuous improvements in the field of both regenerative medicine and tissue engineering have allowed the design of new and more efficacious strategies for the treatment of chronic or hard-to-heal skin wounds, which represent heavy burden, from a medical and economic point of view. These novel approaches are based on the usage of three key methodologies: stem cells, growth factors, and biomimetic scaffolds. These days, the adipose tissue can be considered the main source of multipotent mesenchymal stem cells, especially adipose-derived stem cells (ASCs). ASCs are easily accessible from various fat depots and show an intrinsic plasticity in giving rise to cell types involved in wound healing and angiogenesis. ASCs can be found in fat grafts, historically used in the treatment of chronic wounds, and have been evaluated as such in both animal models and human trials, to exploit their capability of accelerating wound closure and inducing a correct remodeling of the newly formed fibrovascular tissue. Since survival and fitness of ASCs need to be improved, they are now employed in conjunction with advanced wound dressings, together with dermal regenerative templates and platelet-rich plasma (as a source of growth and healing factors). In this work, we provide an overview of the current knowledge on the topic, based on existing studies and on our own experience.
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44
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Stephens CJ, Spector JA, Butcher JT. Biofabrication of thick vascularized neo-pedicle flaps for reconstructive surgery. Transl Res 2019; 211:84-122. [PMID: 31170376 PMCID: PMC6702068 DOI: 10.1016/j.trsl.2019.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 05/06/2019] [Accepted: 05/14/2019] [Indexed: 01/01/2023]
Abstract
Wound chronicity due to intrinsic and extrinsic factors perturbs adequate lesion closure and reestablishment of the protective skin barrier. Immediate and proper care of chronic wounds is necessary for a swift recovery and a reduction of patient vulnerability to infection. Advanced therapies supplemented with standard wound care procedures have been clinically implemented to restore aberrant tissue; however, these treatments are ineffective if local vasculature is too compromised to support minimally-invasive strategies. Autologous "flaps", which are tissues equipped with their own hierarchical vascular supply, can be harvested from one region of the patient and transplanted to the wound where it is reperfused upon microsurgical anastomosis to appropriate recipient vessels. Despite the success of autologous flap transfer, these procedures are extremely invasive, incur obligatory donor-site morbidity, and require sufficient donor-tissue availability, microsurgical expertise, and specialized equipment. 3D-bioprinting modalities, such as extrusion-based bioprinting, can be used to address the clinical constraints of autologous flap transfer, primarily addressing donor-site morbidity and tissue availability. This advancement in regenerative medicine allows the biofabrication of heterogeneous tissue structures with high shape fidelity and spatial resolution to generate biomimetic constructs with the anatomically-precise geometries of native tissue to ensure tissue-specific function. Yet, meaningful progress toward this clinical application has been limited by the lack of vascularization required to meet the nutrient and oxygen demands of clinically relevant tissue volumes. Thus, various criteria for the fabrication of functional tissues with hierarchical, patent vasculature must be considered when implementing 3D-bioprinting technologies for deep, chronic wounds.
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Affiliation(s)
- Chelsea J Stephens
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Jason A Spector
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York; Division of Plastic Surgery, Weill Cornell Medical College, New York, New York
| | - Jonathan T Butcher
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York.
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45
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Zavala G, Sandoval C, Meza D, Contreras R, Gubelin W, Khoury M. Differentiation of adipose-derived stem cells to functional CD105 neg CD73 low melanocyte precursors guided by defined culture condition. Stem Cell Res Ther 2019; 10:249. [PMID: 31399041 PMCID: PMC6688240 DOI: 10.1186/s13287-019-1364-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 12/18/2022] Open
Abstract
Background The generation of functional human epidermal melanocytes (HEM) from stem cells provides an unprecedented source for cell-based therapy in vitiligo. Despite the important efforts exerted to obtain melanin-producing cells from stem cells, pre-clinical results still lack the safety and scalability characteristics essential for their translational application. Methods Here, we report a rapid and efficient protocol based on defined culture conditions capable of differentiating adult adipose-derived stem cells (ADSC) to scalable amounts of proliferative melanocyte precursors (PreMel) within 30 days. PreMel were characterized in vitro through qPCR, Western blot, flow cytometry, biochemical assays, and in vivo assays in immunocompromised mice (NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ, or NSG). Results After 30 days of differentiation, the stem cell-derived PreMel were defined as CD105neg CD73low according to immunophenotypic changes in comparison with parental stem cell markers. In addition, expression of microphthalmia-associated transcription factor (MITF), active tyrosinase (TYR), and the terminal differentiation-involved premelanosome protein (PMEL) were detected. Furthermore, PreMel had the potential to synthesize melanin and package it into melanosomes both in vitro and in vivo in NSG mice skin. Conclusions This study proposes a rapid and scalable protocol for the generation of proliferative melanocyte precursors (PreMel) from ADSC. These PreMel display the essential functional characteristics of bona fide HEM, opening a new path for an autologous cellular therapy for vitiligo patients. Electronic supplementary material The online version of this article (10.1186/s13287-019-1364-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gabriela Zavala
- Consorcio Regenero, La Plaza 2501, Las Condes, Santiago, Chile.,Biomedical Research Center (CIB), Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile
| | - Carolina Sandoval
- Biomedical Research Center (CIB), Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile
| | - Daniel Meza
- Consorcio Regenero, La Plaza 2501, Las Condes, Santiago, Chile.,Biomedical Research Center (CIB), Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile
| | - Rafael Contreras
- Cells for Cells, La Plaza 2501, Las Condes, Santiago, Chile.,Biomedical Research Center (CIB), Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile
| | - Walter Gubelin
- Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile
| | - Maroun Khoury
- Consorcio Regenero, La Plaza 2501, Las Condes, Santiago, Chile. .,Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile. .,Cells for Cells, La Plaza 2501, Las Condes, Santiago, Chile. .,Biomedical Research Center (CIB), Faculty of Medicine, Universidad de los Andes, Monseñor Álvaro del Portillo 12455, Las Condes, Santiago, Chile.
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46
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Kaur A, Midha S, Giri S, Mohanty S. Functional Skin Grafts: Where Biomaterials Meet Stem Cells. Stem Cells Int 2019; 2019:1286054. [PMID: 31354835 PMCID: PMC6636521 DOI: 10.1155/2019/1286054] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 05/21/2019] [Indexed: 12/22/2022] Open
Abstract
Skin tissue engineering has attained several clinical milestones making remarkable progress over the past decades. Skin is inhabited by a plethora of cells spatiotemporally arranged in a 3-dimensional (3D) matrix, creating a complex microenvironment of cell-matrix interactions. This complexity makes it difficult to mimic the native skin structure using conventional tissue engineering approaches. With the advent of newer fabrication strategies, the field is evolving rapidly. However, there is still a long way before an artificial skin substitute can fully mimic the functions and anatomical hierarchy of native human skin. The current focus of skin tissue engineers is primarily to develop a 3D construct that maintains the functionality of cultured cells in a guided manner over a period of time. While several natural and synthetic biopolymers have been translated, only partial clinical success is attained so far. Key challenges include the hierarchical complexity of skin anatomy; compositional mismatch in terms of material properties (stiffness, roughness, wettability) and degradation rate; biological complications like varied cell numbers, cell types, matrix gradients in each layer, varied immune responses, and varied methods of fabrication. In addition, with newer biomaterials being adopted for fabricating patient-specific skin substitutes, issues related to escalating processing costs, scalability, and stability of the constructs under in vivo conditions have raised some concerns. This review provides an overview of the field of skin regenerative medicine, existing clinical therapies, and limitations of the current techniques. We have further elaborated on the upcoming tissue engineering strategies that may serve as promising alternatives for generating functional skin substitutes, the pros and cons associated with each technique, and scope of their translational potential in the treatment of chronic skin ailments.
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Affiliation(s)
- Amtoj Kaur
- Stem Cell Facility (DBT-Centre of Excellence for Stem Cell Research), All India Institute of Medical Sciences, New Delhi, India
| | - Swati Midha
- Stem Cell Facility (DBT-Centre of Excellence for Stem Cell Research), All India Institute of Medical Sciences, New Delhi, India
| | - Shibashish Giri
- Department of Cell Techniques and Applied Stem Cell Biology, Centre for Biotechnology and Biomedicine, University of Leipzig, Deutscher Platz 5, D-04103 Leipzig, Germany
- Department of Plastic Surgery and Hand Surgery, University Hospital Rechts der Isar, Technische Universität München, Munich, Germany
| | - Sujata Mohanty
- Stem Cell Facility (DBT-Centre of Excellence for Stem Cell Research), All India Institute of Medical Sciences, New Delhi, India
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47
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Khiao In M, Richardson KC, Loewa A, Hedtrich S, Kaessmeyer S, Plendl J. Histological and functional comparisons of four anatomical regions of porcine skin with human abdominal skin. Anat Histol Embryol 2019; 48:207-217. [PMID: 30648762 DOI: 10.1111/ahe.12425] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/18/2018] [Accepted: 12/17/2018] [Indexed: 12/18/2022]
Abstract
Because of the shortage of human skin for research purposes, porcine skin has been used as a model of human skin. The aim of this study was to identify the region of German Landrace pig skin that could be used as the best possible substitute for human abdominal skin. Porcine samples were collected from the ear, flank, back and caudal abdomen; human abdominal skin samples were excised during plastic surgery. Histological and ultrastructural assessments were carried out on the epidermis and dermis, with emphasis on the dermo-epidermal interface length, dermo-epidermal thickness ratio as well as densities of; hair follicles, arrector pili muscles, blood vessels and sweat glands. In the pig, the barrier function of the four anatomical regions was assessed. Results showed that both histologically and ultrastructurally, all four regions of porcine skin were similar to human skin. These include the shapes of keratinocytes, structure of cell contacts and presence of Weibel Palade bodies in endothelial cells. Other parameters such as the thickness of epidermis, the thickness of stratum basale, spinosum and granulosum and the number of cell layers in the stratum corneum were similar in human abdominal and in all four regions of porcine skin. However, there were also significant differences especially in the thickness of the stratum corneum, the dermo-epidermal interface length and the blood vessel density.
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Affiliation(s)
- Maneenooch Khiao In
- Department of Veterinary Medicine, Institute for Veterinary Anatomy, Freie Universität Berlin, Berlin, Germany
| | - Kenneth C Richardson
- College of Veterinary Medicine, Murdoch University, Murdoch, Western Australia, Australia
| | - Anna Loewa
- Institute for Pharmacy, Pharmacology & Toxicology, Freie Universität Berlin, Berlin, Germany
| | - Sarah Hedtrich
- Institute for Pharmacy, Pharmacology & Toxicology, Freie Universität Berlin, Berlin, Germany
| | - Sabine Kaessmeyer
- Department of Veterinary Medicine, Institute for Veterinary Anatomy, Freie Universität Berlin, Berlin, Germany
| | - Johanna Plendl
- Department of Veterinary Medicine, Institute for Veterinary Anatomy, Freie Universität Berlin, Berlin, Germany
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48
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Abaci HE, Coffman A, Doucet Y, Chen J, Jacków J, Wang E, Guo Z, Shin JU, Jahoda CA, Christiano AM. Tissue engineering of human hair follicles using a biomimetic developmental approach. Nat Commun 2018; 9:5301. [PMID: 30546011 PMCID: PMC6294003 DOI: 10.1038/s41467-018-07579-y] [Citation(s) in RCA: 162] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/25/2018] [Indexed: 01/15/2023] Open
Abstract
Human skin constructs (HSCs) have the potential to provide an effective therapy for patients with significant skin injuries and to enable human-relevant drug screening for skin diseases; however, the incorporation of engineered skin appendages, such as hair follicles (HFs), into HSCs remains a major challenge. Here, we demonstrate a biomimetic approach for generation of human HFs within HSCs by recapitulating the physiological 3D organization of cells in the HF microenvironment using 3D-printed molds. Overexpression of Lef-1 in dermal papilla cells (DPC) restores the intact DPC transcriptional signature and significantly enhances the efficiency of HF differentiation in HSCs. Furthermore, vascularization of hair-bearing HSCs prior to engraftment allows for efficient human hair growth in immunodeficient mice. The ability to regenerate an entire HF from cultured human cells will have a transformative impact on the medical management of different types of alopecia, as well as chronic wounds, which represent major unmet medical needs. Human skin constructs hold potential for regenerative medicine, but the incorporation of hair follicles into such constructs is a challenge. Here, the authors use 3D printed molds to pattern hair follicle cell types in a physiological organization, and achieve human hair growth on the back of a mouse.
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Affiliation(s)
- Hasan Erbil Abaci
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Abigail Coffman
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Yanne Doucet
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - James Chen
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA.,Department of Systems Biology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Joanna Jacków
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Etienne Wang
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Zongyou Guo
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Jung U Shin
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA
| | - Colin A Jahoda
- Department of Biosciences, Durham University, Durham, UK
| | - Angela M Christiano
- Department of Dermatology, Columbia University Medical Center, New York, NY, 10032, USA. .,Department of Genetics and Development, Columbia University Medical Center, New York, NY, 10032, USA.
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49
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Randall MJ, Jüngel A, Rimann M, Wuertz-Kozak K. Advances in the Biofabrication of 3D Skin in vitro: Healthy and Pathological Models. Front Bioeng Biotechnol 2018; 6:154. [PMID: 30430109 PMCID: PMC6220074 DOI: 10.3389/fbioe.2018.00154] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 10/05/2018] [Indexed: 12/27/2022] Open
Abstract
The relevance for in vitro three-dimensional (3D) tissue culture of skin has been present for almost a century. From using skin biopsies in organ culture, to vascularized organotypic full-thickness reconstructed human skin equivalents, in vitro tissue regeneration of 3D skin has reached a golden era. However, the reconstruction of 3D skin still has room to grow and develop. The need for reproducible methodology, physiological structures and tissue architecture, and perfusable vasculature are only recently becoming a reality, though the addition of more complex structures such as glands and tactile corpuscles require advanced technologies. In this review, we will discuss the current methodology for biofabrication of 3D skin models and highlight the advantages and disadvantages of the existing systems as well as emphasize how new techniques can aid in the production of a truly physiologically relevant skin construct for preclinical innovation.
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Affiliation(s)
- Matthew J Randall
- Department of Health Science and Technology, Institute for Biomechanics, ETH Zürich, Zurich, Switzerland
| | - Astrid Jüngel
- Center of Experimental Rheumatology, University Clinic of Rheumatology, Balgrist University Hospital, University Hospital Zurich, Zurich, Switzerland
| | - Markus Rimann
- Competence Center TEDD, Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences, Waedenswil, Switzerland.,Center for Cell Biology & Tissue Engineering, Institute of Chemistry and Biotechnology, Zurich University of Applied Sciences, Waedenswil, Switzerland
| | - Karin Wuertz-Kozak
- Department of Health Science and Technology, Institute for Biomechanics, ETH Zürich, Zurich, Switzerland.,Schön Clinic Munich Harlaching, Spine Center, Academic Teaching Hospital and Spine Research Institute of the Paracelsus Medical University Salzburg (AU), Munich, Germany.,Department of Health Sciences, University of Potsdam, Potsdam, Germany
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50
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The potential of human induced pluripotent stem cells for modelling diabetic wound healing in vitro. Clin Sci (Lond) 2018; 132:1629-1643. [PMID: 30108152 DOI: 10.1042/cs20171483] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/28/2018] [Accepted: 07/23/2018] [Indexed: 12/11/2022]
Abstract
Impaired wound healing and ulceration caused by diabetes mellitus, is a significant healthcare burden, markedly impairs quality of life for patients, and is the major cause of amputation worldwide. Current experimental approaches used to investigate the complex wound healing process often involve cultures of fibroblasts and/or keratinocytes in vitro, which can be limited in terms of complexity and capacity, or utilisation of rodent models in which the mechanisms of wound repair differ substantively from that in humans. However, advances in tissue engineering, and the discovery of strategies to reprogramme adult somatic cells to pluripotency, has led to the possibility of developing models of human skin on a large scale. Generation of induced pluripotent stem cells (iPSCs) from tissues donated by diabetic patients allows the (epi)genetic background of this disease to be studied, and the ability to differentiate iPSCs to multiple cell types found within skin may facilitate the development of more complex skin models; these advances offer key opportunities for improving modelling of wound healing in diabetes, and the development of effective therapeutics for treatment of chronic wounds.
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