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El-Sayed ME, Atwa A, Sofy AR, Helmy YA, Amer K, Seadawy MG, Bakry S. Mesenchymal stem cell transplantation in burn wound healing: uncovering the mechanisms of local regeneration and tissue repair. Histochem Cell Biol 2024; 161:165-181. [PMID: 37847258 PMCID: PMC10822811 DOI: 10.1007/s00418-023-02244-y] [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] [Subscribe] [Scholar Register] [Accepted: 09/22/2023] [Indexed: 10/18/2023]
Abstract
Burn injuries pose a significant healthcare burden worldwide, often leading to long-term disabilities and reduced quality of life. To explore the impacts of the transplantation of mesenchymal stem cells (MSCs) on the healing of burns and the levels of serum cytokines, 60 fully grown Sprague-Dawley rats were randomly divided into three groups (n = 20 each): group I (control), group II (burn induction), and group III (burn induction + bone marrow (BM)-MSC transplantation). Groups II and III were further divided into four subgroups (n = 5 each) based on euthanasia duration (7, 14, 21, and 28 days post transplant). The experiment concluded with an anesthesia overdose for rat death. After 7, 14, 21, and 28 days, the rats were assessed by clinical, laboratory, and histopathology investigations. The results revealed significant improvements in burn healing potentiality in the group treated with MSC. Furthermore, cytokine levels were measured, with significant increases in interleukin (IL)-6 and interferon alpha (IFN) observed, while IL-10 and transforming growth factor beta (TGF-β) decreased at 7 days and increased until 28 days post burn. Also, the group that underwent the experiment exhibited increased levels of pro-inflammatory cytokines and the anti-inflammatory cytokine IL-10 when compared to the control group. Histological assessments showed better re-epithelialization, neovascularization, and collagen deposition in the experimental group, suggesting that MSC transplantation in burn wounds may promote burn healing by modulating the immune response and promoting tissue regeneration.
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Affiliation(s)
- Mohamed E El-Sayed
- Zoology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, 11884, Egypt
- Biological Prevention Department, Ministry of Defense, Cairo, 11766, Egypt
| | - Ahmed Atwa
- Zoology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, 11884, Egypt.
| | - Ahmed R Sofy
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, 11884, Egypt
| | - Yasser A Helmy
- Department of Plastic & Reconstructive Surgery, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Khaled Amer
- Egypt Center for Research and Regenerative Medicine, ECRRM, 3A Ramses Extension St., Cairo, 11759, Egypt
| | - Mohamed G Seadawy
- Biological Prevention Department, Ministry of Defense, Cairo, 11766, Egypt
| | - Sayed Bakry
- Center for Genetic Engineering- Al-Azhar University, Nasr City, Cairo, 11884, Egypt
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2
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Vecin NM, Kirsner RS. Skin substitutes as treatment for chronic wounds: current and future directions. Front Med (Lausanne) 2023; 10:1154567. [PMID: 37711741 PMCID: PMC10498286 DOI: 10.3389/fmed.2023.1154567] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/21/2023] [Indexed: 09/16/2023] Open
Abstract
Chronic wounds such as diabetic foot ulcers and venous leg ulcers place a significant burden on the healthcare system and in some cases, have 5-year mortality rates comparable to cancer. They negatively impact patients' quality of life due to pain, odor, decreased mobility, and social isolation. Skin substitutes are an advanced therapy recommended for wounds that fail to show decrease in size with standard care. The choice of substitute used should be based on evidence, which often differs based on wound etiology. There are more than 75 skin substitutes currently available, and that number is rising. In this review, we discuss current management and future directions of chronic wounds while providing a review of available randomized control trial data for various skin substitutes.
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Affiliation(s)
- Nicole M. Vecin
- Departments of Medical Education and Public Health Sciences, University of Miami Leonard M. Miller School of Medicine, Miami, FL, United States
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Leonard M. Miller School of Medicine, Miami, FL, United States
| | - Robert S. Kirsner
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Leonard M. Miller School of Medicine, Miami, FL, United States
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3
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Niti A, Koliakos G, Michopoulou A. Stem Cell Therapies for Epidermolysis Bullosa Treatment. Bioengineering (Basel) 2023; 10:bioengineering10040422. [PMID: 37106609 PMCID: PMC10135837 DOI: 10.3390/bioengineering10040422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/25/2023] [Accepted: 03/26/2023] [Indexed: 03/29/2023] Open
Abstract
Epidermolysis bullosa (EB) includes a group of rare skin diseases characterized by skin fragility with bullous formation in the skin, in response to minor mechanical injury, as well as varying degrees of involvement of the mucous membranes of the internal organs. EB is classified into simplex, junctional, dystrophic and mixed. The impact of the disease on patients is both physical and psychological, with the result that their quality of life is constantly affected. Unfortunately, there are still no approved treatments available to confront the disease, and treatment focuses on improving the symptoms with topical treatments to avoid complications and other infections. Stem cells are undifferentiated cells capable of producing, maintaining and replacing terminally differentiated cells and tissues. Stem cells can be isolated from embryonic or adult tissues, including skin, but are also produced by genetic reprogramming of differentiated cells. Preclinical and clinical research has recently greatly improved stem cell therapy, making it a promising treatment option for various diseases in which current medical treatments fail to cure, prevent progression, or alleviate symptoms. So far, stem cells from different sources, mainly hematopoietic and mesenchymal, autologous or heterologous have been used for the treatment of the most severe forms of the disease each one of them with some beneficial effects. However, the mechanisms through which stem cells exert their beneficial role are still unknown or incompletely understood and most importantly further research is required to evaluate the effectiveness and safety of these treatments. The transplantation of skin grafts to patients produced by gene-corrected autologous epidermal stem cells has been proved to be rather successful for the treatment of skin lesions in the long term in a limited number of patients. Nevertheless, these treatments do not address the internal epithelia-related complications manifested in patients with more severe forms.
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Hosseini M, Koehler KR, Shafiee A. Biofabrication of Human Skin with Its Appendages. Adv Healthc Mater 2022; 11:e2201626. [PMID: 36063498 DOI: 10.1002/adhm.202201626] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/30/2022] [Indexed: 01/28/2023]
Abstract
Much effort has been made to generate human skin organ in the laboratory. Yet, the current models are limited due to the lack of many critical biological and structural features of the skin. Importantly, these in vitro models lack appendages and fail to recapitulate the whole human skin construction. Thus, engineering a human skin with the capacity to generate all components, including appendages, is a major challenge. This review intends to provide an update on the recent efforts underway to regenerate appendage-bearing skin organs based on scaffold-free and scaffold-based bioengineering approaches. Although the mouse skin equivalents containing hair follicles, sebaceous glands, and sweat glands have been established in vitro, there has been limited success in humans. A combination of biofabricated matrices and cell aggregates, such as organoids, can pave the way for generating skin substitutes with human-like biological, structural, and physical features. Accordingly, the formation of human skin organoids and reconstruction of vascularized skin equipped with immune cells prompt calls for more scientific research. The generation of appendage-bearing skin substitutes can be applied in practice for wound healing, hair restoration, and scar treatment.
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Affiliation(s)
- Motaharesadat Hosseini
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, 4059, Australia.,ARC Industrial Transformation Training Centre for Multiscale 3D Imaging, Modelling and Manufacturing (M3D), Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - Karl R Koehler
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, 02115, USA.,Department of Otolaryngology, Boston Children's Hospital, Boston, MA, 02115, USA
| | - Abbas Shafiee
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia.,Royal Brisbane and Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia.,The University of Queensland Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, 4102, Australia
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5
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Ma W, Wei X, Gu H, Liu D, Luo W, Cao S, Jia S, He Y, Chen L, Bai Y, Yuan Z. Intra-amniotic transplantation of brain-derived neurotrophic factor-modified mesenchymal stem cells treatment for rat fetuses with spina bifida aperta. Stem Cell Res Ther 2022; 13:413. [PMID: 35964077 PMCID: PMC9375302 DOI: 10.1186/s13287-022-03105-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 07/31/2022] [Indexed: 11/10/2022] Open
Abstract
Background Spina bifida aperta (SBA) is a relatively common clinical type of neural tube defect. Although prenatal fetal surgery has been proven to be an effective treatment for SBA, the recovery of neurological function remains unsatisfactory due to neuron deficiencies. Our previous results demonstrated that intra-amniotic transplanted bone marrow mesenchymal stem cells (BMSCs) could preserve neural function through lesion-specific engraftment and regeneration. To further optimize the role of BMSCs and improve the environment of defective spinal cords so as to make it more conducive to nerve repair, the intra-amniotic transplanted BMSCs were modified with brain-derived neurotrophic factor (BDNF-BMSCs), and the therapeutic potential of BDNF-BMSCs was verified in this study. Methods BMSCs were modified by adenovirus encoding a green fluorescent protein and brain-derived neurotrophic factor (Ad-GFP-BDNF) in vitro and then transplanted into the amniotic cavity of rat fetuses with spina bifida aperta which were induced by all-trans-retinoic acid on embryonic day 15. Immunofluorescence, western blot and real-time quantitative PCR were used to detect the expression of different neuron markers and apoptosis-related genes in the defective spinal cords. Lesion areas of the rat fetuses with spina bifida aperta were measured on embryonic day 20. The microenvironment changes after intra-amniotic BDNF-BMSCs transplantation were investigated by a protein array with 90 cytokines. Results We found that BDNF-BMSCs sustained the characteristic of directional migration, engrafted at the SBA lesion area, increased the expression of BDNF in the defective spinal cords, alleviated the apoptosis of spinal cord cells, differentiated into neurons and skin-like cells, reduced the area of skin lesions, and improved the amniotic fluid microenvironment. Moreover, the BDNF-modified BMSCs showed a better effect than pure BMSCs on the inhibition of apoptosis and promotion of neural differentiation. Conclusion These findings collectively indicate that intra-amniotic transplanted BDNF-BMSCs have an advantage of promoting the recovery of defective neural tissue of SBA fetuses. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-03105-6.
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Affiliation(s)
- Wei Ma
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Xiaowei Wei
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Hui Gu
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Dan Liu
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Wenting Luo
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Songying Cao
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Shanshan Jia
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Yiwen He
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
| | - Lizhu Chen
- Department of Ultrasound, Shengjing Hospital, China Medical University, Shenyang, China
| | - Yuzuo Bai
- Department of Pediatric Surgery, Shengjing Hospital, China Medical University, Shenyang, China
| | - Zhengwei Yuan
- Key Laboratory of Health Ministry for Congenital Malformation, Department of Pediatric Surgery, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China.
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Thompson EL, Pickett-Leonard M, Riddle MJ, Chen W, Albert FW, Tolar J. Genes and compounds that increase type VII collagen expression as potential treatments for dystrophic epidermolysis bullosa. Exp Dermatol 2022; 31:1065-1075. [PMID: 35243691 DOI: 10.1111/exd.14555] [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: 09/28/2021] [Revised: 02/07/2022] [Accepted: 02/27/2022] [Indexed: 11/28/2022]
Abstract
Dystrophic epidermolysis bullosa (DEB) is a skin-blistering disease caused by mutations in COL7A1, which encodes type VII collagen (C7). There is no cure for DEB, but previous work has shown potential therapeutic benefit of increased production of even partially functional C7. Genome-wide screens using CRISPR-Cas9 have enabled the identification of genes involved in cancer development, drug resistance, and other genetic diseases, suggesting that they could be used to identify drivers of C7 production. A keratinocyte C7 reporter cell line was created and used in a genome-wide CRISPR activation (CRISPRa) screen to identify genes and pathways that increase C7 expression. The CRISPRa screen results were used to develop a targeted drug screen to identify compounds that upregulate C7 expression. The C7_tdTomato cell line was validated as an effective reporter for detection of C7 upregulation. The CRISPRa screen identified DENND4B and TYROBP as top gene hits plus pathways related to calcium uptake and immune signaling in C7 regulation. The targeted drug screen identified several compounds that increase C7 expression in keratinocytes, of which kaempferol, a plant flavonoid, also significantly increased C7 mRNA and protein in DEB patient cells.
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Affiliation(s)
- Elizabeth L Thompson
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Michael Pickett-Leonard
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, 55455, USA
| | - Megan J Riddle
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, 55455, USA
| | - Weili Chen
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, 55455, USA
| | - Frank W Albert
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Jakub Tolar
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, 55455, USA.,Stem Cell Institute, University of Minnesota, MN, 55455, USA
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7
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Ishida Y, Nosaka M, Kondo T. Bone Marrow-Derived Cells and Wound Age Estimation. Front Med (Lausanne) 2022; 9:822572. [PMID: 35155503 PMCID: PMC8828650 DOI: 10.3389/fmed.2022.822572] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/03/2022] [Indexed: 12/20/2022] Open
Abstract
Appropriate technology as well as specific target cells and molecules are key factors for determination of wound vitality or wound age in forensic practice. Wound examination is one of the most important tasks for forensic pathologists and is indispensable to distinguish antemortem wounds from postmortem damage. For vital wounds, estimating the age of the wound is also essential in determining how the wound is associated with the cause of death. We investigated bone marrow-derived cells as promising markers and their potential usefulness in forensic applications. Although examination of a single marker cannot provide high reliability and objectivity in estimating wound age, evaluating the appearance combination of bone marrow-derived cells and the other markers may allow for a more objective and accurate estimation of wound age.
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Affiliation(s)
- Yuko Ishida
- *Correspondence: Yuko Ishida ; orcid.org/0000-0001-6104-7599
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8
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Ibrahim MR, Medhat W, El-Fakahany H, Abdel-Raouf H, Snyder EY. The Developmental & Molecular Requirements for Ensuring that Human Pluripotent Stem Cell-Derived Hair Follicle Bulge Stem Cells Have Acquired Competence for Hair Follicle Generation Following Transplantation. Cell Transplant 2021; 30:9636897211014820. [PMID: 34053245 PMCID: PMC8182633 DOI: 10.1177/09636897211014820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
When using human induced pluripotent stem cells (hiPSCs) to achieve hair follicle (HF) replacement, we found it best to emulate the earliest fundamental developmental processes of gastrulation, ectodermal lineage commitment, and dermogenesis. Viewing hiPSCs as a model of the epiblast, we exploited insights from mapping the dynamic up- and down-regulation of the developmental molecules that determine HF lineage in order to ascertain the precise differentiation stage and molecular requirements for grafting HF-generating progenitors. To yield an integrin-dependent lineage like the HF in vivo, we show that hiPSC derivatives should co-express, just prior to transplantation, the following combination of markers: integrins α6 and β1 and the glycoprotein CD200 on their surface; and, intracellularly, the epithelial marker keratin 18 and the hair follicle bulge stem cell (HFBSC)-defining molecules transcription factor P63 and the keratins 15 and 19. If the degree of trichogenic responsiveness indicated by the presence of these molecules is not achieved (they peak on Days 11-18 of the protocol), HF generation is not possible. Conversely, if differentiation of the cells is allowed to proceed beyond the transient intermediate progenitor state represented by the HFBSC, and instead cascades to their becoming keratin 14+ keratin 5+ CD200– keratinocytes (Day 25), HF generation is equally impossible. We make the developmental case for transplanting at Day 16-18 of differentiation—the point at which the hiPSCs have lost pluripotency, have attained optimal expression of HFBSC markers, have not yet experienced downregulation of key integrins and surface glycoproteins, have not yet started expressing keratinocyte-associated molecules, and have sufficient proliferative capacity to allow a well-populated graft. This panel of markers may be used for isolating (by cytometry) HF-generating derivatives away from cell types unsuited for this therapy as well as for identifying trichogenic drugs.
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Affiliation(s)
- Michel R Ibrahim
- Department of Dermatology, STD's and Andrology, Faculty of Medicine, Minia University, Al-Minya, Egypt.,Center for Stem Cells & Regenerative Medicine, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - Walid Medhat
- Department of Dermatology, STD's and Andrology, Faculty of Medicine, Minia University, Al-Minya, Egypt
| | - Hasan El-Fakahany
- Department of Dermatology, STD's and Andrology, Faculty of Medicine, Minia University, Al-Minya, Egypt
| | - Hamza Abdel-Raouf
- Department of Dermatology, STD's and Andrology, Faculty of Medicine, Minia University, Al-Minya, Egypt
| | - Evan Y Snyder
- Center for Stem Cells & Regenerative Medicine, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA.,Department of Pediatrics, University of California-San Diego, La Jolla, CA, USA
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9
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Therapeutic effect of mesenchymal stem cells on histopathological, immunohistochemical, and molecular analysis in second-grade burn model. Stem Cell Res Ther 2021; 12:308. [PMID: 34051875 PMCID: PMC8164255 DOI: 10.1186/s13287-021-02365-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 04/30/2021] [Indexed: 12/12/2022] Open
Abstract
Background and aim Deleterious cutaneous tissue damages could result from exposure to thermal trauma, which could be ameliorated structurally and functionally through therapy via the most multipotent progenitor bone marrow mesenchymal stem cells (BM-MSCs). This study aimed to induce burns and examine the effect of BM-MSCs during a short and long period of therapy. Material and methods Ninety albino rats were divided into three groups: group I (control); group II (burn model), the animals were exposed to the preheated aluminum bar at 100°C for 15 s; and group III (the burned animals subcutaneously injected with BM-MSCs (2×106 cells/ ml)); they were clinically observed and sacrificed at different short and long time intervals, and skin samples were collected for histopathological and immunohistochemical examination and analysis of different wound healing mediators via quantitative polymerase chain reaction (qPCR). Results Subcutaneous injection of BM-MSCs resulted in the decrease of the wound contraction rate; the wound having a pinpoint appearance and regular arrangement of the epidermal layer with thin stratum corneum; decrease in the area percentages of ADAMs10 expression; significant downregulation of transforming growth factor-β (TGF-β), interleukin-6 (IL-6), tumor necrotic factor-α (TNF-α), metalloproteinase-9 (MMP-9), and microRNA-21; and marked upregulation of heat shock protein-90α (HSP-90α) especially in late stages. Conclusion BM-MSCs exhibited a powerful healing property through regulating the mediators of wound healing and restoring the normal skin structures, reducing the scar formation and the wound size.
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10
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Fan Z, Xie X, Zhu S, Liao X, Yin Z, Zhang Y, Liu F. Novel pre-vascularized tissue-engineered dermis based on stem cell sheet technique used for dermis-defect healing. Regen Biomater 2020; 7:627-638. [PMID: 33365148 PMCID: PMC7748445 DOI: 10.1093/rb/rbaa039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/30/2020] [Accepted: 08/23/2020] [Indexed: 12/28/2022] Open
Abstract
Insufficient donor dermis and the shortage of three-dimensional vascular networks are the main limitations in the tissue-engineered dermis (TED). To solve these problems, we initially constructed pre-vascularized bone marrow mesenchymal stem cell sheet (PBMCS) and pre-vascularized fibroblasts cell sheet (PFCS) by cell sheet technology, and then superimposed or folded them together to construct a pre-vascularized TED (PTED), aiming to mimic the real dermis structure. The constructed PTED was implanted in nude mice dorsal dermis-defect wound and the wound-healing effect was quantified at Days 1, 7 and 14 via the methods of histochemistry and immunohistochemistry. The results showed that PTED could rapidly promote the wound closure, especially at Day 14, and the wound-healing rate of three-layer PTED could reach 97.2% (P < 0.01), which was faster than the blank control group (89.1%), PBMCS (92.4%), PFCS (93.8%) and six-layer PTED (92.3%). In addition, the vessel density in the PTED group was higher than the other groups on the 14th day. Taken together, it is proved that the PTED, especially three-layer PTED, is more conducive to the full-thickness dermis-defect repair and the construction of the three-dimensional vascular networks, indicating its potential application in dermis-defect repair.
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Affiliation(s)
- Zengjie Fan
- School of Stomatology, Lanzhou University, Donggang West Road 199, Gansu 730000, People's Republic of China
| | - Xuzhuzi Xie
- School of Stomatology, Lanzhou University, Donggang West Road 199, Gansu 730000, People's Republic of China
| | - Shengqian Zhu
- School of Stomatology, Lanzhou University, Donggang West Road 199, Gansu 730000, People's Republic of China
| | - Xiaozhu Liao
- School of Stomatology, Lanzhou University, Donggang West Road 199, Gansu 730000, People's Republic of China
| | - Zhengrong Yin
- School of Stomatology, Lanzhou University, Donggang West Road 199, Gansu 730000, People's Republic of China
| | - Yujue Zhang
- Liaocheng People's Hospital, Medical College of Liaocheng University, Liaocheng 252000, People's Republic of China
| | - Fengzhen Liu
- Liaocheng People's Hospital, Medical College of Liaocheng University, Liaocheng 252000, People's Republic of China
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11
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Keith AR, Twaroski K, Ebens CL, Tolar J. Leading edge: emerging drug, cell, and gene therapies for junctional epidermolysis bullosa. Expert Opin Biol Ther 2020; 20:911-923. [PMID: 32178539 PMCID: PMC7392816 DOI: 10.1080/14712598.2020.1740678] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 03/06/2020] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Junctional epidermolysis bullosa (JEB) is a rare inherited genetic disorder with limited treatments beyond palliative care. A major hallmark of JEB is skin blistering caused by functional loss or complete absence of major structural proteins of the skin. Impaired wound healing in patients with JEB gives rise to chronic cutaneous ulcers that require daily care. Wound care and infection control are the current standard of care for this patient population. AREAS COVERED This review covers research and clinical implementation of emerging drug, cell, and gene therapies for JEB. Current clinical trials use topical drug delivery to manipulate the inflammation and re-epithelialization phases of wound healing or promote premature stop codon readthrough to accelerate chronic wound closure. Allogeneic cell therapies for JEB have been largely unsuccessful, with autologous skin grafting emerging as a reliable method of resolving the cutaneous manifestations of JEB. Genetic correction and transplant of autologous keratinocytes have demonstrated persistent amelioration of chronic wounds in a subset of patients. EXPERT OPINION Emerging therapies address the cutaneous symptoms of JEB but are unable to attend to systemic manifestations of the disease. Investigations into the molecular mechanism(s) underpinning the failure of systemic allogeneic cell therapies are necessary to expand the range of effective JEB therapies.
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Affiliation(s)
- Allison R. Keith
- Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
- Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Kirk Twaroski
- Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
- Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Christen L. Ebens
- Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jakub Tolar
- Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
- Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA
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12
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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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Weng T, Wu P, Zhang W, Zheng Y, Li Q, Jin R, Chen H, You C, Guo S, Han C, Wang X. Regeneration of skin appendages and nerves: current status and further challenges. J Transl Med 2020; 18:53. [PMID: 32014004 PMCID: PMC6996190 DOI: 10.1186/s12967-020-02248-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 01/28/2020] [Indexed: 12/14/2022] Open
Abstract
Tissue-engineered skin (TES), as an analogue of native skin, is promising for wound repair and regeneration. However, a major drawback of TES products is a lack of skin appendages and nerves to enhance skin healing, structural integrity and skin vitality. Skin appendages and nerves are important constituents for fully functional skin. To date, many studies have yielded remarkable results in the field of skin appendages reconstruction and nerve regeneration. However, patients often complain about a loss of skin sensation and even cutaneous chronic pain. Restoration of pain, temperature, and touch perceptions should now be a major challenge to solve in order to improve patients’ quality of life. Current strategies to create skin appendages and sensory nerve regeneration are mainly based on different types of seeding cells, scaffold materials, bioactive factors and involved signaling pathways. This article provides a comprehensive overview of different strategies for, and advances in, skin appendages and sensory nerve regeneration, which is an important issue in the field of tissue engineering and regenerative medicine.
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Affiliation(s)
- Tingting Weng
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Pan Wu
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Wei Zhang
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Yurong Zheng
- Department of Breast Surgery, Zhejiang Cancer Hospital, Hangzhou, 310022, China
| | - Qiong Li
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Ronghua Jin
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Haojiao Chen
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Chuangang You
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Songxue Guo
- Department of Plastic Surgery, Second Affiliated Hospital of Zhejiang University, Hangzhou, 310009, China
| | - Chunmao Han
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Xingang Wang
- Department of Burns & Wound Care Center, Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China.
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Doornaert M, Depypere B, Creytens D, Declercq H, Taminau J, Lemeire K, Monstrey S, Berx G, Blondeel P. Human decellularized dermal matrix seeded with adipose-derived stem cells enhances wound healing in a murine model: Experimental study. Ann Med Surg (Lond) 2019; 46:4-11. [PMID: 31463049 PMCID: PMC6710295 DOI: 10.1016/j.amsu.2019.07.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 07/18/2019] [Accepted: 07/31/2019] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE Full-thickness cutaneous wounds treated with split-thickness skin grafts often result in unaesthetic and hypertrophic scars. Dermal substitutes are currently used together with skin grafts in a single treatment to reconstruct the dermal layer of the skin, resulting in improved quality of scars. Adipose-derived stem cells (ASCs) have been described to enhance wound healing through structural and humoral mechanisms. In this study, we investigate the compatibility of xenogen-free isolated human ASCs seeded on human acellular dermal matrix (Glyaderm®) in a murine immunodeficient wound model. METHODS Adipose tissue was obtained from abdominal liposuction, and stromal cells were isolated mechanically and cultured xenogen-free in autologous plasma-supplemented medium. Glyaderm® discs were seeded with EGFP-transduced ASCs, and implanted on 8 mm full-thickness dorsal wounds in an immunodeficient murine model, in comparison to standard Glyaderm® discs. Re-epithelialization rate, granulation thickness and vascularity were assessed by histology on days 3, 7 and 12. Statistical analysis was conducted using the Wilcoxon signed-rank test. EGFP-staining allowed for tracking of the ASCs in vivo. Hypoxic culture of the ASCs was performed to evaluate cytokine production. RESULTS ASCs were characterized with flowcytometric analysis and differentiation assay. EGFP-tranduction resulted in 95% positive cells after sorting. Re-epithelialization in the ASC-seeded Glyaderm® side was significantly increased, resulting in complete wound healing in 12 days. Granulation thickness and vascularization were significantly increased during early wound healing. EGFP-ASCs could be retrieved by immunohistochemistry in the granulation tissue in early wound healing, and lining vascular structures in later stages. CONCLUSION Glyaderm® is an effective carrier to deliver ASCs in full-thickness wounds. ASC-seeded Glyaderm® significantly enhances wound healing compared to standard Glyaderm®. The results of this study encourage clinical trials for treatment of full-thickness skin defects. Furthermore, xenogen-free isolation and autologous plasma-augmented culture expansion of ASCs, combined with the existing clinical experience with Glyaderm®, aid in simplifying the necessary procedures in a GMP-laboratory setting.
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Affiliation(s)
- M. Doornaert
- Department of Plastic and Reconstructive Surgery, Gent University Hospital, Gent, Belgium
| | - B. Depypere
- Department of Plastic and Reconstructive Surgery, Gent University Hospital, Gent, Belgium
| | - D. Creytens
- Department of Pathology, Gent University Hospital, Gent, Belgium
- Cancer Research Institute Gent (CRIG), Gent, Belgium
| | - H. Declercq
- Department of Basic Medical Sciences, Ugent, Gent, Belgium
| | - J. Taminau
- Cancer Research Institute Gent (CRIG), Gent, Belgium
- Molecular and Cellular Oncology Laboratory, Department of Biomedical Molecular Biology, Vlaams Instituut voor Biotechnologie (VIB), Gent, Belgium
| | - K. Lemeire
- Molecular and Cellular Oncology Laboratory, Department of Biomedical Molecular Biology, Vlaams Instituut voor Biotechnologie (VIB), Gent, Belgium
- Inflammation Research Centre (IRC), VIB, Gent, Belgium
| | - S. Monstrey
- Department of Plastic and Reconstructive Surgery, Gent University Hospital, Gent, Belgium
| | - G. Berx
- Cancer Research Institute Gent (CRIG), Gent, Belgium
- Molecular and Cellular Oncology Laboratory, Department of Biomedical Molecular Biology, Vlaams Instituut voor Biotechnologie (VIB), Gent, Belgium
| | - Ph. Blondeel
- Department of Plastic and Reconstructive Surgery, Gent University Hospital, Gent, Belgium
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15
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Kurita M, Izpisua Belmonte JC, Suzuki K, Okazaki M. Development of de novo epithelialization method for treatment of cutaneous ulcers. J Dermatol Sci 2019; 95:8-12. [PMID: 31255469 DOI: 10.1016/j.jdermsci.2019.06.006] [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: 06/01/2019] [Revised: 06/16/2019] [Accepted: 06/17/2019] [Indexed: 11/29/2022]
Abstract
Cutaneous ulcers are a common cause of morbidity. We have developed a de novo epithelialization method for treating cutaneous ulcers by means of reprogramming wound-resident mesenchymal cells in vivo into cells able to form a stratified epithelium: induced stratified epithelial progenitors (iSEPs). Administration of 4 transcription factors (DNP63A, GRHL2, TFAP2A, and cMYC) expressed via adeno-associated viral vectors enabled generation of epithelial cells and tissues, thereby acheiving de novo epithelialization from the surfaces of cutaneous ulcers in a mouse model. Generated epithelia, having barrier functions equivalent to the original epidermis, were maintained for more than 6 months. Our findings constitute a proof of concept for future development towards innovative therapies for cutaneous ulcers via de novo epithelialization.
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Affiliation(s)
- Masakazu Kurita
- Department of Plastic and Aesthetic Surgery, The University of Tokyo Hospital, Japan.
| | | | - Keiichiro Suzuki
- Institute for Advanced Co-Creation Studies, Osaka University, Japan; Graduate School of Engineering Science, Osaka University, Japan
| | - Mutsumi Okazaki
- Department of Plastic and Aesthetic Surgery, The University of Tokyo Hospital, Japan
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16
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Park H, Lad S, Boland K, Johnson K, Readio N, Jin G, Asfaha S, Patterson KS, Singh A, Yang X, Londono D, Singh A, Trempus C, Gordon D, Wang TC, Morris RJ. Bone marrow-derived epithelial cells and hair follicle stem cells contribute to development of chronic cutaneous neoplasms. Nat Commun 2018; 9:5293. [PMID: 30546048 PMCID: PMC6294255 DOI: 10.1038/s41467-018-07688-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 11/09/2018] [Indexed: 12/17/2022] Open
Abstract
We used allogeneic bone marrow transplantation (BMT) and a mouse multistage cutaneous carcinogenesis model to probe recruitment of bone marrow-derived epithelial cells (BMDECs) in skin tumors initiated with the carcinogen, dimethylbenz[a]anthracene (DMBA), and promoted with 12-O-tetradecanolyphorbol-13-acetate (TPA). BMDECs clustered in the lesional epithelium, expressed cytokeratins, proliferated, and stratified. We detected cytokeratin induction in plastic-adherent bone marrow cells (BMCs) cultured in the presence of filter-separated keratinocytes (KCs) and bone morphogenetic protein 5 (BMP5). Lineage-depleted BMCs migrated towards High Mobility Group Box 1 (HMGB1) protein and epidermal KCs in ex vivo invasion assays. Naive female mice receiving BMTs from DMBA-treated donors developed benign and malignant lesions after TPA promotion alone. We conclude that BMDECs contribute to the development of papillomas and dysplasia, demonstrating a systemic contribution to these lesions. Furthermore, carcinogen-exposed BMCs can initiate benign and malignant lesions upon tumor promotion. Ultimately, these findings may suggest targets for treatment of non-melanoma skin cancers.
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Affiliation(s)
- Heuijoon Park
- Department of Pathology and Cell Biology, Columbia University, New York, 10032, NY, USA
- Department of Dermatology, Columbia University, New York, 10032, NY, USA
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Sonali Lad
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Kelsey Boland
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Kelly Johnson
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Nyssa Readio
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Guangchun Jin
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
| | - Samuel Asfaha
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
| | - Kelly S Patterson
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
| | - Ashok Singh
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Xiangdong Yang
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
| | - Douglas Londono
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, 08854-8082, NJ, USA
| | - Anupama Singh
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA
| | - Carol Trempus
- Matrix Biology Group, Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, 27709, NC, USA
| | - Derek Gordon
- Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, 08854-8082, NJ, USA
| | - Timothy C Wang
- Division of Digestive and Liver Diseases, Department of Medicine and Irving Cancer Center, Columbia University, New York, 10032, NY, USA
| | - Rebecca J Morris
- Department of Pathology and Cell Biology, Columbia University, New York, 10032, NY, USA.
- Department of Dermatology, Columbia University, New York, 10032, NY, USA.
- The Hormel Institute, University of Minnesota, Austin, 55912, MN, USA.
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17
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Hair Follicle Dermal Cells Support Expansion of Murine and Human Embryonic and Induced Pluripotent Stem Cells and Promote Haematopoiesis in Mouse Cultures. Stem Cells Int 2018; 2018:8631432. [PMID: 30154866 PMCID: PMC6098861 DOI: 10.1155/2018/8631432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 04/26/2018] [Indexed: 12/26/2022] Open
Abstract
In the hair follicle, the dermal papilla (DP) and dermal sheath (DS) support and maintain proliferation and differentiation of the epithelial stem cells that produce the hair fibre. In view of their regulatory properties, in this study, we investigated the interaction between hair follicle dermal cells (DP and DS) and embryonic stem cells (ESCs); induced pluripotent stem cells (iPSCs); and haematopoietic stem cells. We found that coculture of follicular dermal cells with ESCs or iPSCs supported their prolonged maintenance in an apparently undifferentiated state as established by differentiation assays, immunocytochemistry, and RT-PCR for markers of undifferentiated ESCs. We further showed that cytokines that are involved in ESC support are also expressed by cultured follicle dermal cells, providing a possible explanation for maintenance of ES cell stemness in cocultures. The same cytokines were expressed within follicles in situ in a pattern more consistent with a role in follicle growth activities than stem cell maintenance. Finally, we show that cultured mouse follicle dermal cells provide good stromal support for haematopoiesis in an established coculture model. Human follicular dermal cells represent an accessible and readily propagated source of feeder cells for pluripotent and haematopoietic cells and have potential for use in clinical applications.
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Linard C, Brachet M, Strup-Perrot C, L'homme B, Busson E, Squiban C, Holler V, Bonneau M, Lataillade JJ, Bey E, Benderitter M. Autologous Bone Marrow Mesenchymal Stem Cells Improve the Quality and Stability of Vascularized Flap Surgery of Irradiated Skin in Pigs. Stem Cells Transl Med 2018; 7:569-582. [PMID: 29777577 PMCID: PMC6090511 DOI: 10.1002/sctm.17-0267] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 01/30/2018] [Indexed: 12/21/2022] Open
Abstract
Cutaneous radiation syndrome has severe long-term health consequences. Because it causes an unpredictable course of inflammatory waves, conventional surgical treatment is ineffective and often leads to a fibronecrotic process. Data about the long-term stability of healed wounds, with neither inflammation nor resumption of fibrosis, are lacking. In this study, we investigated the effect of injections of local autologous bone marrow-derived mesenchymal stromal cells (BM-MSCs), combined with plastic surgery for skin necrosis, in a large-animal model. Three months after irradiation overexposure to the rump, minipigs were divided into three groups: one group treated by simple excision of the necrotic tissue, the second by vascularized-flap surgery, and the third by vascularized-flap surgery and local autologous BM-MSC injections. Three additional injections of the BM-MSCs were performed weekly for 3 weeks. The quality of cutaneous wound healing was examined 1 year post-treatment. The necrotic tissue excision induced a pathologic scar characterized by myofibroblasts, excessive collagen-1 deposits, and inadequate vascular density. The vascularized-flap surgery alone was accompanied by inadequate production of extracellular matrix (ECM) proteins (decorin, fibronectin); the low col1/col3 ratio, associated with persistent inflammatory nodules, and the loss of vascularization both attested to continued immaturity of the ECM. BM-MSC therapy combined with vascularized-flap surgery provided mature wound healing characterized by a col1/col3 ratio and decorin and fibronectin expression that were all similar to that of nonirradiated skin, with no inflammation, and vascular stability. In this preclinical model, vascularized flap surgery successfully and lastingly remodeled irradiated skin only when combined with BM-MSC therapy. Stem Cells Translational Medicine 2018:569-582.
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Affiliation(s)
- Christine Linard
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Michel Brachet
- Department of Plastic Surgery, Military Hospital of Percy, Clamart, France
| | - Carine Strup-Perrot
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Bruno L'homme
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Elodie Busson
- Research and Cell Therapy Department, Military Blood Transfusion Center, Percy Military Hospital, Clamart, France
| | - Claire Squiban
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Valerie Holler
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Michel Bonneau
- Centre of Research in Interventional Imaging, National Institut of Agronomic Research, Jouy-en-Josas, France
| | - Jean-Jacques Lataillade
- Research and Cell Therapy Department, Military Blood Transfusion Center, Percy Military Hospital, Clamart, France
| | - Eric Bey
- Department of Plastic Surgery, Military Hospital of Percy, Clamart, France
| | - Marc Benderitter
- Institute of Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
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Lynch MD, Watt FM. Fibroblast heterogeneity: implications for human disease. J Clin Invest 2018; 128:26-35. [PMID: 29293096 DOI: 10.1172/jci93555] [Citation(s) in RCA: 292] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Fibroblasts synthesize the extracellular matrix of connective tissue and play an essential role in maintaining the structural integrity of most tissues. Researchers have long suspected that fibroblasts exhibit functional specialization according to their organ of origin, body site, and spatial location. In recent years, a number of approaches have revealed the existence of fibroblast subtypes in mice. Here, we discuss fibroblast heterogeneity with a focus on the mammalian dermis, which has proven an accessible and tractable system for the dissection of these relationships. We begin by considering differences in fibroblast identity according to anatomical site of origin. Subsequently, we discuss new results relating to the existence of multiple fibroblast subtypes within the mouse dermis. We consider the developmental origin of fibroblasts and how this influences heterogeneity and lineage restriction. We discuss the mechanisms by which fibroblast heterogeneity arises, including intrinsic specification by transcriptional regulatory networks and epigenetic factors in combination with extrinsic effects of the spatial context within tissue. Finally, we discuss how fibroblast heterogeneity may provide insights into pathological states including wound healing, fibrotic diseases, and aging. Our evolving understanding suggests that ex vivo expansion or in vivo inhibition of specific fibroblast subtypes may have important therapeutic applications.
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Affiliation(s)
- Magnus D Lynch
- King's College London Centre for Stem Cells and Regenerative Medicine, Guy's Hospital, Great Maze Pond, London, United Kingdom.,St John's Institute of Dermatology, King's College London, London, United Kingdom
| | - Fiona M Watt
- King's College London Centre for Stem Cells and Regenerative Medicine, Guy's Hospital, Great Maze Pond, London, United Kingdom
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20
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Affiliation(s)
- H T Hassan
- Institute of Medical Sciences, University of Lincoln, UK.
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21
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Salgado G, Ng YZ, Koh LF, Goh CS, Common JE. Human reconstructed skin xenografts on mice to model skin physiology. Differentiation 2017; 98:14-24. [DOI: 10.1016/j.diff.2017.09.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 01/17/2023]
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Xavier-Elsas P, Ferreira RN, Gaspar-Elsas MIC. Surgical and immune reconstitution murine models in bone marrow research: Potential for exploring mechanisms in sepsis, trauma and allergy. World J Exp Med 2017; 7:58-77. [PMID: 28890868 PMCID: PMC5571450 DOI: 10.5493/wjem.v7.i3.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/11/2017] [Accepted: 06/30/2017] [Indexed: 02/06/2023] Open
Abstract
Bone marrow, the vital organ which maintains lifelong hemopoiesis, currently receives considerable attention, as a source of multiple cell types which may play important roles in repair at distant sites. This emerging function, distinct from, but closely related to, bone marrow roles in innate immunity and inflammation, has been characterized through a number of strategies. However, the use of surgical models in this endeavour has hitherto been limited. Surgical strategies allow the experimenter to predetermine the site, timing, severity and invasiveness of injury; to add or remove aggravating factors (such as infection and defects in immunity) in controlled ways; and to manipulate the context of repair, including reconstitution with selected immune cell subpopulations. This endows surgical models overall with great potential for exploring bone marrow responses to injury, inflammation and infection, and its roles in repair and regeneration. We review three different murine surgical models, which variously combine trauma with infection, antigenic stimulation, or immune reconstitution, thereby illuminating different aspects of the bone marrow response to systemic injury in sepsis, trauma and allergy. They are: (1) cecal ligation and puncture, a versatile model of polymicrobial sepsis; (2) egg white implant, an intriguing model of eosinophilia induced by a combination of trauma and sensitization to insoluble allergen; and (3) ectopic lung tissue transplantation, which allows us to dissect afferent and efferent mechanisms leading to accumulation of hemopoietic cells in the lungs. These models highlight the gain in analytical power provided by the association of surgical and immunological strategies.
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Ho J, Walsh C, Yue D, Dardik A, Cheema U. Current Advancements and Strategies in Tissue Engineering for Wound Healing: A Comprehensive Review. Adv Wound Care (New Rochelle) 2017; 6:191-209. [PMID: 28616360 PMCID: PMC5467128 DOI: 10.1089/wound.2016.0723] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/09/2017] [Indexed: 12/20/2022] Open
Abstract
Significance: With an aging population leading to an increase in diabetes and associated cutaneous wounds, there is a pressing clinical need to improve wound-healing therapies. Recent Advances: Tissue engineering approaches for wound healing and skin regeneration have been developed over the past few decades. A review of current literature has identified common themes and strategies that are proving successful within the field: The delivery of cells, mainly mesenchymal stem cells, within scaffolds of the native matrix is one such strategy. We overview these approaches and give insights into mechanisms that aid wound healing in different clinical scenarios. Critical Issues: We discuss the importance of the biomimetic niche, and how recapitulating elements of the native microenvironment of cells can help direct cell behavior and fate. Future Directions: It is crucial that during the continued development of tissue engineering in wound repair, there is close collaboration between tissue engineers and clinicians to maintain the translational efficacy of this approach.
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Affiliation(s)
- Jasmine Ho
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
| | - Claire Walsh
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
| | - Dominic Yue
- Department of Plastic and Reconstructive Surgery, Royal Stoke University Hospital, Stoke-on-Trent, United Kingdom
| | - Alan Dardik
- The Vascular Biology and Therapeutics Program and the Department of Surgery, Yale University School of Medicine, New Haven, Connecticut
| | - Umber Cheema
- UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom
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Mot YY, Othman I, Sharifah SH. Synergistic antibacterial effect of co-administering adipose-derived mesenchymal stromal cells and Ophiophagus hannah L-amino acid oxidase in a mouse model of methicillin-resistant Staphylococcus aureus-infected wounds. Stem Cell Res Ther 2017; 8:5. [PMID: 28114965 PMCID: PMC5259957 DOI: 10.1186/s13287-016-0457-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/09/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023] Open
Abstract
Background Mesenchymal stromal cells (MSCs) and Ophiophagus hannahl-amino acid oxidase (Oh-LAAO) have been reported to exhibit antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA). Published data have indicated that synergistic antibacterial effects could be achieved by co-administration of two or more antimicrobial agents. However, this hypothesis has not been proven in a cell- and protein-based combination. In this study, we investigate if co-administration of adipose-derived MSCs and Oh-LAAO into a mouse model of MRSA-infected wounds would be able to result in a synergistic antibacterial effect. Methods MSCs and Oh-LAAO were isolated and characterized by standard methodologies. The effects of the experimental therapies were evaluated in C57/BL6 mice. The animal study groups consisted of full-thickness uninfected and MRSA-infected wound models which received Oh-LAAO, MSCs, or both. Oh-LAAO was administered directly on the wound while MSCs were delivered via intradermal injections. The animals were housed individually with wound measurements taken on days 0, 3, and 7. Histological analyses and bacterial enumeration were performed on wound biopsies to determine the efficacy of each treatment. Results Immunophenotyping and differentiation assays conducted on isolated MSCs indicated expression of standard cell surface markers and plasticity which corresponds to published data. Characterization of Oh-LAAO by proteomics, enzymatic, and antibacterial assays confirmed the identity, purity, and functionality of the enzyme prior to use in our subsequent studies. Individual treatments with MSCs and Oh-LAAO in the infected model resulted in reduction of MRSA load by one order of magnitude to the approximate range of 6 log10 colony-forming units (CFU) compared to untreated controls (7.3 log10 CFU). Similar wound healing and improvements in histological parameters were observed between the two groups. Co-administration of MSCs and Oh-LAAO reduced bacterial burden by approximately two orders of magnitude to 5.1 log10 CFU. Wound closure measurements and histology analysis of biopsies obtained from the combinational therapy group indicated significant enhancement in the wound healing process compared to all other groups. Conclusions We demonstrated that co-administration of MSCs and Oh-LAAO into a mouse model of MRSA-infected wounds exhibited a synergistic antibacterial effect which significantly reduced the bacterial count and accelerated the wound healing process. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0457-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yee Yik Mot
- Jeffrey Cheah School of Medicine and Health Sciences and Tropical Medicine and Biology, Infectious Diseases and Health, Monash University Malaysia, Jalan Lagoon Selatan, Subang Jaya, 47500, Selangor, Malaysia
| | - Iekhsan Othman
- Jeffrey Cheah School of Medicine and Health Sciences and Tropical Medicine and Biology, Infectious Diseases and Health, Monash University Malaysia, Jalan Lagoon Selatan, Subang Jaya, 47500, Selangor, Malaysia
| | - Syed Hassan Sharifah
- Jeffrey Cheah School of Medicine and Health Sciences and Tropical Medicine and Biology, Infectious Diseases and Health, Monash University Malaysia, Jalan Lagoon Selatan, Subang Jaya, 47500, Selangor, Malaysia.
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26
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Fibroblast heterogeneity and its implications for engineering organotypic skin models in vitro. Eur J Cell Biol 2015; 94:483-512. [PMID: 26344860 DOI: 10.1016/j.ejcb.2015.08.001] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 08/11/2015] [Accepted: 08/11/2015] [Indexed: 12/19/2022] Open
Abstract
Advances in cell culture methods, multidisciplinary research, clinical need to replace lost skin tissues and regulatory need to replace animal models with alternative test methods has led to development of three dimensional models of human skin. In general, these in vitro models of skin consist of keratinocytes cultured over fibroblast-populated dermal matrices. Accumulating evidences indicate that mesenchyme-derived signals are essential for epidermal morphogenesis, homeostasis and differentiation. Various studies show that fibroblasts isolated from different tissues in the body are dynamic in nature and are morphologically and functionally heterogeneous subpopulations. Further, these differences seem to be dictated by the local biological and physical microenvironment the fibroblasts reside resulting in "positional identity or memory". Furthermore, the heterogeneity among the fibroblasts play a critical role in scarless wound healing and complete restoration of native tissue architecture in fetus and oral mucosa; and excessive scar formation in diseased states like keloids and hypertrophic scars. In this review, we summarize current concepts about the heterogeneity among fibroblasts and their role in various wound healing environments. Further, we contemplate how the insights on fibroblast heterogeneity could be applied for the development of next generation organotypic skin models.
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Zgheib C, Xu J, Mallette AC, Caskey RC, Zhang L, Hu J, Liechty KW. SCF increases in utero-labeled stem cells migration and improves wound healing. Wound Repair Regen 2015; 23:583-90. [PMID: 26032674 DOI: 10.1111/wrr.12318] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/27/2015] [Indexed: 12/17/2022]
Abstract
Diabetic skin wounds lack the ability to heal properly and constitute a major and significant complication of diabetes. Nontraumatic lower extremity amputations are the number one complication of diabetic skin wounds. The complexity of their pathophysiology requires an intervention at many levels to enhance healing and wound closure. Stem cells are a promising treatment for diabetic skin wounds as they have the ability to correct abnormal healing. Stem cell factor (SCF), a chemokine expressed in the skin, can induce stem cells migration, however the role of SCF in diabetic skin wound healing is still unknown. We hypothesize that SCF would correct the impairment and promote the healing of diabetic skin wounds. Our results show that SCF improved wound closure in diabetic mice and increased HIF-1α and vascular endothelial growth factor (VEGF) expression levels in these wounds. SCF treatment also enhanced the migration of red fluorescent protein (RFP)-labeled skin stem cells via in utero intra-amniotic injection of lenti-RFP at E8. Interestingly these RFP+ cells are present in the epidermis, stain negative for K15, and appear to be distinct from the already known hair follicle stem cells. These results demonstrate that SCF improves diabetic wound healing in part by increasing the recruitment of a unique stem cell population present in the skin.
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Affiliation(s)
- Carlos Zgheib
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Junwang Xu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | | | - Robert C Caskey
- University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | - Liping Zhang
- University of Mississippi Medical Center, Jackson, Mississippi
| | - Junyi Hu
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Kenneth W Liechty
- Laboratory for Fetal and Regenerative Biology, Department of Surgery, University of Colorado Denver, Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
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Isakson M, de Blacam C, Whelan D, McArdle A, Clover AJP. Mesenchymal Stem Cells and Cutaneous Wound Healing: Current Evidence and Future Potential. Stem Cells Int 2015; 2015:831095. [PMID: 26106431 PMCID: PMC4461792 DOI: 10.1155/2015/831095] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 05/07/2015] [Indexed: 01/09/2023] Open
Abstract
Human skin is a remarkable organ that sustains insult and injury throughout life. The ability of skin to expeditiously repair wounds is paramount to survival. With an aging global population, coupled with a rise in the prevalence of conditions such as diabetes, chronic wounds represent a significant biomedical burden. Mesenchymal stem cells (MSC), a progenitor cell population of the mesoderm lineage, have been shown to be significant mediators in inflammatory environments. Preclinical studies of MSC in various animal wound healing models point towards a putative therapy. This review examines the body of evidence suggesting that MSC accelerate wound healing in both clinical and preclinical studies and also the possible mechanisms controlling its efficacy. The delivery of a cellular therapy to the masses presents many challenges from a safety, ethical, and regulatory point of view. Some of the issues surrounding the introduction of MSC as a medicinal product are also delineated in this review.
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Affiliation(s)
- M. Isakson
- Department of Plastic and Reconstructive Surgery, Cork University Hospital, Cork, Ireland
| | - C. de Blacam
- Department of Plastic and Reconstructive Surgery, Cork University Hospital, Cork, Ireland
| | - D. Whelan
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
| | - A. McArdle
- Department of Plastic and Reconstructive Surgery, Cork University Hospital, Cork, Ireland
| | - A. J. P. Clover
- Department of Plastic and Reconstructive Surgery, Cork University Hospital, Cork, Ireland
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
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Li Z, Han S, Wang X, Han F, Zhu X, Zheng Z, Wang H, Zhou Q, Wang Y, Su L, Shi J, Tang C, Hu D. Rho kinase inhibitor Y-27632 promotes the differentiation of human bone marrow mesenchymal stem cells into keratinocyte-like cells in xeno-free conditioned medium. Stem Cell Res Ther 2015; 6:17. [PMID: 25889377 PMCID: PMC4393638 DOI: 10.1186/s13287-015-0008-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 02/16/2015] [Accepted: 02/16/2015] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Bone marrow mesenchymal stem cells (BMSCs), which have the ability to self-renew and to differentiate into multiple cell types, have recently become a novel strategy for cell-based therapies. The differentiation of BMSCs into keratinocytes may be beneficial for patients with burns, disease, or trauma. However, the currently available cells are exposed to animal materials during their cultivation and induction. These xeno-contaminations severely limit their clinical outcomes. Previous studies have shown that the Rho kinase (ROCK) inhibitor Y-27632 can promote induction efficiency and regulate the self-renewal and differentiation of stem cells. In the present study, we attempted to establish a xeno-free system for the differentiation of BMSCs into keratinocytes and to investigate whether Y-27632 can facilitate this differentiation. METHODS BMSCs isolated from patients were cultured by using a xeno-free system and characterised by using flow cytometric analysis and adipogenic and osteogenic differentiation assays. Human primary keratinocytes were also isolated from patients. Then, the morphology, population doubling time, and β-galactosidase staining level of these cells were evaluated in the presence or absence of Y-27632 to determine the effects of Y-27632 on the state of the keratinocytes. Keratinocyte-like cells (KLCs) were detected at different time points by immunocytofluorescence analysis. Moreover, the efficiency of BMSC differentiation under different conditions was measured by quantitative real-time-polymerase chain reaction (RT-PCR) and Western blot analyses. RESULTS The ROCK inhibitor Y-27632 promoted the proliferation and lifespan of human primary keratinocytes. In addition, we showed that keratinocyte-specific markers could be detected in BMSCs cultured in a xeno-free system using keratinocyte-conditioned medium (KCM) independent of the presence of Y-27632. However, the efficiency of the differentiation of BMSCs into KLCs was significantly higher in the presence of Y-27632 using immunofluorescence, quantitative RT-PCR, and Western blot analyses. CONCLUSIONS This study demonstrated that Y-27632 could promote the proliferation and survival of human primary keratinocytes in a xeno-free culture system. In addition, we found that BMSCs have the ability to differentiate into KLCs in KCM and that Y-27632 can facilitate this differentiation. Our results suggest that BMSCs are capable of differentiating into KLCs in vitro and that the ROCK pathway may play a critical role in this process.
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Affiliation(s)
- Zhenzhen Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Shichao Han
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Xingqin Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, No. 1 Xinsi Road, Xi'an, 710038, Shaanxi, China.
| | - Fu Han
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Xiongxiang Zhu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Zhao Zheng
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Hongtao Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Qin Zhou
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Yunchuan Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Linlin Su
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Jihong Shi
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Chaowu Tang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, No. 127 West Changle Road, Xi'an, 710032, Shaanxi, China.
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Driskell RR, Watt FM. Understanding fibroblast heterogeneity in the skin. Trends Cell Biol 2014; 25:92-9. [PMID: 25455110 DOI: 10.1016/j.tcb.2014.10.001] [Citation(s) in RCA: 253] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/09/2014] [Accepted: 10/13/2014] [Indexed: 01/06/2023]
Abstract
Fibroblasts are found in most tissues, yet they remain poorly characterised. Different fibroblast subpopulations with distinct functions have been identified in the skin. This functional heterogeneity reflects the varied fibroblast lineages that arise from a common embryonic precursor. In addition to autocrine signals, fibroblasts are highly responsive to Wnt-regulated signals from the overlying epidermis, which can act both locally, via extracellular matrix (ECM) deposition, and via secreted factors that impact the behaviour of fibroblasts in different dermal locations. These findings may explain some of the changes that occur in connective tissue during wound healing and cancer progression.
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Affiliation(s)
- Ryan R Driskell
- Centre for Stem Cells and Regenerative Medicine, King's College London, 28th Floor, Tower Wing, Guy's Hospital Campus, London SE1 9RT, UK
| | - Fiona M Watt
- Centre for Stem Cells and Regenerative Medicine, King's College London, 28th Floor, Tower Wing, Guy's Hospital Campus, London SE1 9RT, UK.
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Ibrahim ZA, Eltatawy RA, Ghaly NR, Abd El-Naby NM, Abou El Fetouh HM, Abd Elateef AE, Abdou S, Tahaa A, El Afandy M. Autologus bone marrow stem cells in atrophic acne scars: A pilot study. J DERMATOL TREAT 2014; 26:260-5. [DOI: 10.3109/09546634.2014.946379] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Hodgkinson T, Yuan XF, Bayat A. Adult stem cells in tissue engineering. Expert Rev Med Devices 2014; 6:621-40. [DOI: 10.1586/erd.09.48] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Graf BW, Chaney EJ, Marjanovic M, Adie SG, De Lisio M, Valero MC, Boppart MD, Boppart SA. Long-term time-lapse multimodal intravital imaging of regeneration and bone-marrow-derived cell dynamics in skin. TECHNOLOGY (ELMSFORD, N.Y.) 2013; 1:8-19. [PMID: 25089085 PMCID: PMC4114059 DOI: 10.1142/s2339547813500027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A major challenge for translating cell-based therapies is understanding the dynamics of cells and cell populations in complex in vivo environments. Intravital microscopy has shown great promise for directly visualizing cell behavior in vivo. However, current methods are limited to relatively short imaging times (hours), by ways to track cell and cell population dynamics over extended time-lapse periods (days to weeks to months), and by relatively few imaging contrast mechanisms that persist over extended investigations. We present technology to visualize and quantify complex, multifaceted dynamic changes in natural deformable skin over long time periods using novel multimodal imaging and a non-rigid image registration method. These are demonstrated in green fluorescent protein (GFP) bone marrow (BM) transplanted mice to study dynamic skin regeneration. This technology provides a novel perspective for studying dynamic biological processes and will enable future studies of stem, immune, and tumor cell biology in vivo.
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Affiliation(s)
- Benedikt W Graf
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA ; Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Eric J Chaney
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Marina Marjanovic
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Steven G Adie
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Michael De Lisio
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA ; Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - M Carmen Valero
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Marni D Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA ; Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
| | - Stephen A Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA ; Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA ; Departments of Bioengineering and Internal Medicine, University of Illinois at Urbana-Champaign, 405 N. Mathews Avenue, Urbana, IL 61801, USA
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Akela A, Nandi SK, Das P, Banerjee D, Roy S, Datta U. Autologous bone marrow-derived cells with placental extract for healing excisional cutaneous wounds in animal model. Int Wound J 2013; 10:167-76. [PMID: 22494419 PMCID: PMC7950527 DOI: 10.1111/j.1742-481x.2012.00964.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Topical wound-healing potential of autologous bone marrow-derived nucleated cells along with placental extract was evaluated in comparison with buffy coat of autologous blood on full-thickness cutaneous wounds in the thoracolumbar region of 15 clinically healthy New Zealand rabbits. Three wounds of 2 × 2 cm, one on the right side of the body and two on the left side of the midline were created on the dorsal lumbar region of each rabbit under xylazine-ketamine anaesthesia. The wounds of each animal were randomly assigned to one of the three treatments: topical application of autologous bone marrow-derived cells with placental extract (group I), application of buffy coat in the autologous plasma with placental extract (group II) and autologous plasma with placental extract as control (group III). Wounds were observed for 30 days macroscopically and for granulation tissue formation, histomorphological and histochemical evaluation. Time of appearance of granulation tissues and filling of wound beds were faster in group I followed by group II and group III animals, respectively. Histomorphological findings exhibited an earlier disappearance of inflammatory reaction, better epithelialisation, significantly maximum neovascularisation, fibroplasias and collagenation in group I followed by group II and group III animals, respectively. Histochemical findings also depicted maximum number of robust, thick, interwoven type of collagen fibres, stout, highly tortuous and interwoven network of elastin fibres and numerous mesh war form of reticulin fibres within the dermal component were present in group I when compared with group II and III animals. Experiment conclude that single application of autologous bone marrow-nucleated cells with placental extract topically could be a novel option for faster healing in complicated non healing wounds both in human beings and animals.
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Affiliation(s)
- Ashok Akela
- Department of Veterinary Surgery and Radiology, West Bengal University of Animal and Fishery Sciences, Kolkata, India
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He J, Duan H, Xiong Y, Zhang W, Zhou G, Cao Y, Liu W. Participation of CD34-enriched mouse adipose cells in hair morphogenesis. Mol Med Rep 2013; 7:1111-6. [PMID: 23404453 DOI: 10.3892/mmr.2013.1307] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 01/09/2013] [Indexed: 11/05/2022] Open
Abstract
Adipose-derived stromal vascular fraction (SVF) cells are heterogeneous in nature, containing a number of different cell types. Recent studies indicate that CD34 may be a specific marker for adipose-derived mesenchymal stem cells (ADMSCs). Using their participation in hair morphogenesis as a model, the multi-differentiation potential of adult stem cells was investigated. In addition, adipose tissue or adipogenic lineage cells appear to be associated with the hair follicle cycle. The purpose of this study was to test the potential of CD34+ cells enriched from fat tissue in hair morphogenesis. To investigate this, unsorted SVF, CD34+ and CD34- cells sorted from the SVF of green fluorescence protein (GFP) transgenic mice were mixed with fetal mouse keratinocytes and dermal fibroblasts of gestational day 17.5 (E17.5) and then subcutaneously injected into nude mice. The results showed that in the reconstituted skin tissue, larger tissue blocks with more developed hair follicles were observed in the CD34+ cell group compared with the other two groups. Histological and immunofluorescent staining analyses revealed that only CD34+ cells may participate in hair morphogenesis by their integration into dermal sheath structures. However, no involvement in other skin appendages was observed. In addition, differentiation into endothelial cells and participation in blood vessel formation were also observed in both CD34+ and SVF cells, but not in CD34- cells. As expected, participation in adipogenesis was observed in all groups. Our results suggest that CD34+ cells may represent the ADMSCs which possess stronger multiple differentiation potential during reconstituted skin development.
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Affiliation(s)
- Jing He
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, P.R. China
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Mistriotis P, Andreadis ST. Hair follicle: a novel source of multipotent stem cells for tissue engineering and regenerative medicine. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:265-78. [PMID: 23157470 DOI: 10.1089/ten.teb.2012.0422] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The adult body harbors powerful reservoirs of stem cells that enable tissue regeneration under homeostatic conditions or in response to disease or injury. The hair follicle (HF) is a readily accessible mini organ within the skin and contains stem cells from diverse developmental origins that were shown to have surprisingly broad differentiation potential. In this review, we discuss the biology of the HF with particular emphasis on the various stem cell populations residing within the tissue. We summarize the existing knowledge on putative HF stem cell markers, the differentiation potential, and technologies to isolate and expand distinct stem cell populations. We also discuss the potential of HF stem cells for drug and gene delivery, tissue engineering, and regenerative medicine. We propose that the abundance of stem cells with broad differentiation potential and the ease of accessibility makes the HF an ideal source of stem cells for gene and cell therapies.
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Affiliation(s)
- Panagiotis Mistriotis
- Bioengineering Laboratory, Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Amherst, New York 14260-4200, USA
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Natesan S, Zamora DO, Wrice NL, Baer DG, Christy RJ. Bilayer Hydrogel With Autologous Stem Cells Derived From Debrided Human Burn Skin for Improved Skin Regeneration. J Burn Care Res 2013; 34:18-30. [DOI: 10.1097/bcr.0b013e3182642c0e] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Zhang Y, Hao H, Liu J, Fu X, Han W. Repair and Regeneration of Skin Injury by Transplanting Microparticles Mixed With Wharton’s Jelly and MSCs From the Human Umbilical Cord. INT J LOW EXTR WOUND 2012; 11:264-70. [PMID: 23089966 DOI: 10.1177/1534734612463577] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The prognosis for extensive and deep skin injury is not satisfactory because of scar formation and the loss of normal function and skin appendages. Several novel therapies for skin repair and regeneration have emerged. Currently, stem cell–based therapies are attractive candidates in regenerative medicine to treat skin injuries. Human umbilical cord Wharton’s jelly–derived mesenchymal stem cells (hUC-MSCs) have become a unique, accessible, and noncontroversial source of regeneration in medicine. The aim of this study was to explore a new strategy for treating skin wounds. A mixture of hUC-MSCs, Wharton’s jelly, and skin microparticles were transplanted to 10-mm diameter, full-thickness, middorsal, excisional skin wounds of mice. After 7 days, the tissue sections were sampled for reconstruction analysis and histological examination. After transplantation, there was a remarkable development of newborn skin and its appendages. We could see newly generated layers of epidermis, sebaceous glands, hair follicle, and sweat glands clearly. This innovative strategy could be very promising and may significantly increase the quality of repair and regeneration of skin in injuries.
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Affiliation(s)
| | - Haojie Hao
- Chinese PLA General Hospital, Beijing, China
| | - Jiejie Liu
- Chinese PLA General Hospital, Beijing, China
| | - Xiaobing Fu
- Chinese PLA General Hospital, Beijing, China
| | - Weidong Han
- Chinese PLA General Hospital, Beijing, China
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Stenn K, Parimoo S, Zheng Y, Barrows T, Boucher M, Washenik K. Bioengineering the hair follicle. Organogenesis 2012; 3:6-13. [PMID: 19279694 DOI: 10.4161/org.3.1.3237] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The hair follicle develops from the primitive embryonic epidermis as a result of complex epithelial-mesenchymal interactions. The full follicle, consisting of epithelial cylinders under control of a proximal lying mesenchymal papilla, grows in cycles giving rise to a new hair shaft during each cycle. The ability to cycle endows the follicle with regenerative properties. The evolution of hair follicle engineering began with the recognition in the early 1960's that hair follicles could be transplanted clinically into a foreign site and still grow a shaft typical of the donor site. Since that time, it has been found that the follicular papilla has hair follicle inducing properties and that the hair follicle houses within it epithelial stem cells that can respond to hair inductive signals. These findings have laid the foundation for isolating hair-forming cells, for expanding the cells in culture, and for forming new follicles in vivo.
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Affiliation(s)
- K Stenn
- Aderans Research Institute, Inc.; Philadelphia, Pennsylvania USA
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Akela A, Nandi SK, Banerjee D, Das P, Roy S, Joardar SN, Mandal M, Das PK, Pradhan NR. Evaluation of autologous bone marrow in wound healing in animal model: a possible application of autologous stem cells. Int Wound J 2012; 9:505-16. [PMID: 22168917 PMCID: PMC7950587 DOI: 10.1111/j.1742-481x.2011.00909.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
A study was conducted to evaluate the potential of autologous bone marrow-derived cells in comparison with buffy coat of autologous blood for rapid cutaneous wound healing in rabbit model. Three square full-thickness skin excisional wounds were created in 15 selected experimental animals (rabbit) divided randomly into three groups. The wound was treated with autologous bone marrow cells in plasma (group 1), buffy coat of blood in plasma (group 2) and autologous plasma as control (group 3). Wounds were observed for 30 days for granulation tissue formation, biochemical, histomorphological and histochemical evaluation. In this study, granulation tissue appeared significantly lesser in wounds of group 3 animals followed by group 2 and 1 animals. Neovascularisation, granulation tissue formation, denser, thicker and better arranged collagen fibres, reticulin fibres and elastin fibres formation was more in group 1 as compared with other groups. It was concluded that the application of bone marrow-derived nucleated cells into the wound margins resulted in early and significantly faster rate of complete healing as compared with buffy coat of autologous blood and autologous plasma (control). This approach may be beneficial in various surface wounds that heal at a slower rate and recommended for healing of various complicated wound in future.
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Affiliation(s)
- Ashok Akela
- Department of Veterinary Surgery & Radiology, West Bengal University of Animal & Fishery Sciences, Kolkata, West Bengal, India
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Kim H, Choi K, Kweon OK, Kim WH. Enhanced wound healing effect of canine adipose-derived mesenchymal stem cells with low-level laser therapy in athymic mice. J Dermatol Sci 2012; 68:149-56. [PMID: 23084629 DOI: 10.1016/j.jdermsci.2012.09.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 08/31/2012] [Accepted: 09/14/2012] [Indexed: 12/23/2022]
Abstract
BACKGROUND Adipose-derived mesenchymal stem cells (ASCs) are attractive cell source for skin tissue engineering. However, one obstacle to this approach is that the transplanted ASC population can decline rapidly in the recipient tissue. OBJECTIVE The aim of this study was to investigate the effects of low-level laser therapy (LLLT) on transplanted canine ASCs in a skin wound animal model. METHODS LLLT, ASC transplantation (ASCs) and ASC transplantation with LLLT (ASCs+LLLT) were applied to the wound bed in athymic mice. Wound healing was assessed by gross evaluation and by hematoxylin and eosin staining. The survival, differentiation and secretion of vascular endothelial growth factor and basic fibroblast growth factor of the ASCs were evaluated by immunohistochemistry and Western blotting. RESULTS The ASCs and ASCs+LLLT groups stimulated wound closure and histological skin regeneration. The ASCs+LLLT group enhanced the wound healing, including neovascularization and regeneration of skin appendages, compared with the ASCs group. The ASCs contributed skin regeneration via differentiation and secretion of growth factors. In the ASCs+LLLT group, the survival of ASCs was increased by the decreased apoptosis of ASCs in the wound bed. The secretion of growth factors was stimulated in the ASCs+LLLT group compared with the ASCs group. CONCLUSION These data suggest that LLLT is an effective biostimulator of ASCs in wound healing that enhances the survival of ASCs and stimulates the secretion of growth factors in the wound bed.
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Affiliation(s)
- Hyoju Kim
- Department of Veterinary Surgery, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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Liu H, Zhang J, Liu CY, Hayashi Y, Kao WWY. Bone marrow mesenchymal stem cells can differentiate and assume corneal keratocyte phenotype. J Cell Mol Med 2012; 16:1114-24. [PMID: 21883890 PMCID: PMC4365890 DOI: 10.1111/j.1582-4934.2011.01418.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
It remains elusive as to what bone marrow (BM) cell types infiltrate into injured and/or diseased tissues and subsequently differentiate to assume the phenotype of residential cells, for example, neurons, cardiac myocytes, keratocytes, etc., to repair damaged tissue. Here, we examined the possibility of whether BM cell invasion via circulation into uninjured and injured corneas could assume a keratocyte phenotype, using chimeric mice generated by transplantation of enhanced green fluorescent protein (EGFP)+ BM cells into keratocan null (Kera−/−) and lumican null (Lum−/−) mice. EGFP+ BM cells assumed dendritic cell morphology, but failed to synthesize corneal-specific keratan sulfate proteoglycans, that is KS-lumican and KS-keratocan. In contrast, some EGFP+ BM cells introduced by intrastromal transplantation assumed keratocyte phenotypes. Furthermore, BM cells were isolated from Kera-Cre/ZEG mice, a double transgenic mouse line in which cells expressing keratocan become EGFP+ due to the synthesis of Cre driven by keratocan promoter. Three days after corneal and conjunctival transplantations of such BM cells into Kera−/− mice, green keratocan positive cells were found in the cornea, but not in conjunctiva. It is worthy to note that transplanted BM cells were rejected in 4 weeks. MSC isolated from BM were used to examine if BM mesenchymal stem cells (BM-MSC) could assume keratocyte phenotype. When BM-MSC were intrastromal-transplanted into Kera−/− mice, they survived in the cornea without any immune and inflammatory responses and expressed keratocan in Kera−/− mice. These observations suggest that corneal intrastromal transplantation of BM-MSC may be an effective treatment regimen for corneal diseases involving dysfunction of keratocytes.
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Affiliation(s)
- Hongshan Liu
- Department of Ophthalmology, Edith Crawley Vision Research Center, University of Cincinnati, Cincinnati, OH, USA.
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Blumberg SN, Berger A, Hwang L, Pastar I, Warren SM, Chen W. The role of stem cells in the treatment of diabetic foot ulcers. Diabetes Res Clin Pract 2012; 96:1-9. [PMID: 22142631 DOI: 10.1016/j.diabres.2011.10.032] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 09/15/2011] [Accepted: 10/24/2011] [Indexed: 12/19/2022]
Abstract
Diabetic foot ulcers (DFUs) are a significant and rapidly growing complication of diabetes and its effects on wound healing. Over half of diabetic patients who develop a single ulcer will subsequently develop another ulcer of which the majority will become chronic non-healing ulcers. One-third will progress to lower extremity amputation. Over the past decade, the outcomes for patients with DFUs ulcers have not improved, despite advances in wound care. Successful treatment of diabetic foot ulcers is hindered by the lack of targeted therapy that hones in on the healing processes dysregulated by diabetes. Stem cells are a promising treatment for DFUs as they are capable of targeting, as well as bypassing, the underlying abnormal healing mechanisms and deranged cell signaling in diabetic wounds and promote healing. This review will focus on existing stem cell technologies and their application in the treatment of DFUs.
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Affiliation(s)
- Sheila N Blumberg
- New York University School of Medicine, Department of Surgery, Division of Wound Healing & Regenerative Medicine, New York, NY 10016, United States
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Ang CC, Tay YK. Hematological abnormalities and the use of granulocyte-colony-stimulating factor in patients with Stevens-Johnson syndrome and toxic epidermal necrolysis. Int J Dermatol 2012; 50:1570-8. [PMID: 22098009 DOI: 10.1111/j.1365-4632.2011.05007.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Derangements in blood cell counts have been described in patients with Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) but are not well characterized. We aim to describe the relationship between our patients' hematological results and the evolution of disease and hypothesize on the possible roles of granulocyte-colony-stimulating factor (G-CSF) in the management of these conditions. MATERIALS AND METHODS Clinical records of our patients with SJS and TEN from January 2005 to 2010 were analyzed. RESULTS Anemia and lymphopenia were most commonly seen, while thrombocytopenia was uncommon. Leukopenia and neutropenia were seen in patients with more severe disease, and the trend of leukopenia and neutropenia followed the evolution of disease. Two patients received G-CSF for febrile neutropenia and had a rapid recovery of their neutrophil counts as well as a shorter time to re-epithelialization. CONCLUSION Our patients tended to have leukopenia and neutropenia that followed a predictable trend of decline and subsequent improvement depending on the stage of disease. This may be of pathogenic significance, and G-CSF may be used in these cases to manage febrile neutropenia and aid re-epithelialization. Further basic science research is required to prove our hypotheses.
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Affiliation(s)
- Chia-Chun Ang
- Department of Dermatology, Changi General Hospital, Singapore.
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Peng C, Lei J, Luo C. Fibrocytes: a potential therapeutic cell population in chronic wounds. J Formos Med Assoc 2012; 111:1-2. [PMID: 22435122 DOI: 10.1016/j.jfma.2011.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Cheng Peng
- The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.
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Cell-type-specific differentiation and molecular profiles in skin transplantation: implication of medical approach for genetic skin diseases. J Transplant 2011; 2011:501857. [PMID: 22174987 PMCID: PMC3235896 DOI: 10.1155/2011/501857] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 09/07/2011] [Indexed: 01/16/2023] Open
Abstract
Skin is highly accessible and valuable organ, which holds promise to accelerate the understanding of future medical innovation in association with skin transplantation, engineering, and wound healing. In skin transplantation biology, multistage and multifocal damages occur in both grafted donor and perilesional host skin and need to be repaired properly for the engraftment and maintenance of characteristic skin architecture. These local events are more unlikely to be regulated by the host immunity, because human skin transplantation has accomplished the donor skin engraftment onto the immunocompromised or immunosuppressive animals. Recent studies have emerged the importance of α-smooth muscle actin- (SMA-) positive myofibroblasts, via stage- and cell-specific contribution of TGFβ, PDGF, ET-1, CCN-2 signalling pathways, and mastocyte-derived mediators (e.g., histamine and tryptase), for the functional reorganisation of the grafted skin. Moreover, particular cell lineages from bone marrow (BM) cells have been shown to harbour the diferentiation capacity into multiple skin cell phenotypes, including epidermal keratinocytes and dermal endothelial cells and pericytes, undercontrolled by chemokines or cytokines. From a dermatological viewpoint, we review the recent update of cell-type- and molecular-specific action associated with reconstitution of the grafted skin and also focus on the novel application of BM transplantation medicine in genetic skin diseases.
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Rustad KC, Wong VW, Sorkin M, Glotzbach JP, Major MR, Rajadas J, Longaker MT, Gurtner GC. Enhancement of mesenchymal stem cell angiogenic capacity and stemness by a biomimetic hydrogel scaffold. Biomaterials 2011; 33:80-90. [PMID: 21963148 DOI: 10.1016/j.biomaterials.2011.09.041] [Citation(s) in RCA: 279] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 09/15/2011] [Indexed: 01/09/2023]
Abstract
In this study, we examined the capacity of a biomimetic pullulan-collagen hydrogel to create a functional biomaterial-based stem cell niche for the delivery of mesenchymal stem cells (MSCs) into wounds. Murine bone marrow-derived MSCs were seeded into hydrogels and compared to MSCs grown in standard culture conditions. Hydrogels induced MSC secretion of angiogenic cytokines and expression of transcription factors associated with maintenance of pluripotency and self-renewal (Oct4, Sox2, Klf4) when compared to MSCs grown in standard conditions. An excisonal wound healing model was used to compare the ability of MSC-hydrogel constructs versus MSC injection alone to accelerate wound healing. Injection of MSCs did not significantly improve time to wound closure. In contrast, wounds treated with MSC-seeded hydrogels showed significantly accelerated healing and a return of skin appendages. Bioluminescence imaging and FACS analysis of luciferase+/GFP+ MSCs indicated that stem cells delivered within the hydrogel remained viable longer and demonstrated enhanced engraftment efficiency than those delivered via injection. Engrafted MSCs were found to differentiate into fibroblasts, pericytes and endothelial cells but did not contribute to the epidermis. Wounds treated with MSC-seeded hydrogels demonstrated significantly enhanced angiogenesis, which was associated with increased levels of VEGF and other angiogenic cytokines within the wounds. Our data suggest that biomimetic hydrogels provide a functional niche capable of augmenting MSC regenerative potential and enhancing wound healing.
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Affiliation(s)
- Kristine C Rustad
- Department of Surgery, Stanford University, GK 201, Stanford, CA 94305, USA
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Wang X, Tredget EE, Wu Y. Dynamic signals for hair follicle development and regeneration. Stem Cells Dev 2011; 21:7-18. [PMID: 21787229 DOI: 10.1089/scd.2011.0230] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Hair follicles form during embryonic development and, after birth, undergo recurrent cycling of growth, regression, and relative quiescence. As a functional mini-organ, the hair follicle develops in an environment with dynamic and alternating changes of diverse molecular signals. Over the past decades, genetically engineered mouse models have been used to study hair follicle morphogenesis and significant advances have been made toward the identification of key signaling pathways and the regulatory genes involved. In contrast, much less is understood in signals regulating hair follicle regeneration. Like hair follicle development, hair follicle regeneration probably relies on populations of stem cells that undergo a highly coordinated and stepwise program of differentiation to produce the completed structure. Here, we review recent advances in the understanding of the molecular signals underlying hair follicle morphogenesis and regeneration, with a focus on the initiation of the primary hair follicle structure placode. Knowledge about hair follicle morphogenesis may help develop novel therapeutic strategies to enhance cutaneous regeneration and improve wound healing.
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Affiliation(s)
- Xusheng Wang
- Life Science Division, Tsinghua University Graduate School at Shenzhen, China
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