1
|
Zhang M, Xing J, Zhong Y, Zhang T, Liu X, Xing D. Advanced function, design and application of skin substitutes for skin regeneration. Mater Today Bio 2024; 24:100918. [PMID: 38223459 PMCID: PMC10784320 DOI: 10.1016/j.mtbio.2023.100918] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/14/2023] [Accepted: 12/13/2023] [Indexed: 01/16/2024] Open
Abstract
The development of skin substitutes aims to replace, mimic, or improve the functions of human skin, regenerate damaged skin tissue, and replace or enhance skin function. This includes artificial skin, scaffolds or devices designed for treatment, imitation, or improvement of skin function in wounds and injuries. Therefore, tremendous efforts have been made to develop functional skin substitutes. However, there is still few reports systematically discuss the relationship between the advanced function and design requirements. In this paper, we review the classification, functions, and design requirements of artificial skin or skin substitutes. Different manufacturing strategies for skin substitutes such as hydrogels, 3D/4D printing, electrospinning, microfluidics are summarized. This review also introduces currently available skin substitutes in clinical trials and on the market and the related regulatory requirements. Finally, the prospects and challenges of skin substitutes in the field of tissue engineering are discussed.
Collapse
Affiliation(s)
- Miao Zhang
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
| | - Jiyao Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
| | - Yingjie Zhong
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
| | - Tingting Zhang
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
| | - Xinlin Liu
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
| | - Dongming Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266071, China
- Cancer Institute, Qingdao University, Qingdao 266071, China
- School of Life Sciences, Tsinghua University, Beijing 100084, China
| |
Collapse
|
2
|
Kim W, Gwon Y, Park S, Kim H, Kim J. Therapeutic strategies of three-dimensional stem cell spheroids and organoids for tissue repair and regeneration. Bioact Mater 2023; 19:50-74. [PMID: 35441116 PMCID: PMC8987319 DOI: 10.1016/j.bioactmat.2022.03.039] [Citation(s) in RCA: 86] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/16/2022] [Accepted: 03/25/2022] [Indexed: 02/07/2023] Open
Abstract
Three-dimensional (3D) stem cell culture systems have attracted considerable attention as a way to better mimic the complex interactions between individual cells and the extracellular matrix (ECM) that occur in vivo. Moreover, 3D cell culture systems have unique properties that help guide specific functions, growth, and processes of stem cells (e.g., embryogenesis, morphogenesis, and organogenesis). Thus, 3D stem cell culture systems that mimic in vivo environments enable basic research about various tissues and organs. In this review, we focus on the advanced therapeutic applications of stem cell-based 3D culture systems generated using different engineering techniques. Specifically, we summarize the historical advancements of 3D cell culture systems and discuss the therapeutic applications of stem cell-based spheroids and organoids, including engineering techniques for tissue repair and regeneration.
Collapse
Affiliation(s)
- Woochan Kim
- Department of Convergence Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Yonghyun Gwon
- Department of Convergence Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Sunho Park
- Department of Convergence Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyoseong Kim
- Department of Convergence Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jangho Kim
- Department of Convergence Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea
- Interdisciplinary Program in IT-Bio Convergence System, Chonnam National University, Gwangju, 61186, Republic of Korea
| |
Collapse
|
3
|
Kim J, Hasegawa T, Wada A, Maeda Y, Ikeda S. Keratinocyte-Like Cells Trans-Differentiated from Human Adipose-Derived Stem Cells, Facilitate Skin Wound Healing in Mice. Ann Dermatol 2021; 33:324-332. [PMID: 34341633 PMCID: PMC8273321 DOI: 10.5021/ad.2021.33.4.324] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/05/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) have been reported to promote wound healing in both animal models and human studies. Among MSCs, adipose-derived stem cells (ADSCs) can be easily harvested in large quantities. Objective We investigated whether skin wound healing in mice can be facilitated by keratinocyte-like cells differentiated from ADSCs (KC-ADSCs). Methods For the wound contraction and epithelialization model, a 20 mm×20 mm fullthickness skin wound was made on the dorsum. For the wound epithelialization model, a 6 mm×6 mm full-thickness skin wound was made on the dorsum. A nitrile rubber stent with an inner diameter of 8 mm was sutured around the wounds to minimize wound contraction. Undifferentiated ADSCs (uADSCs) or KC-ADSCs was injected around the wound base in both models. To evaluate whether the injected ADSCs could enhance wound contraction in a skin wound, the contractile activity of ADSCs was assessed by an in vitro type I collagen gel contraction assay. Alpha-smooth muscle actin (αSMA) expressions in uADSCs and KC-ADSCs were also evaluated by flow cytometry and real-time polymerase chain reaction. Results In a wound contraction and epithelialization model, KC-ADSCs further facilitated wound healing compared with uADSCs. In a wound epithelialization model, KC-ADSCs also further facilitated wound epithelialization compared with uADSCs. The contractile activity of KC-ADSCs was lower than that of uADSCs. The uADSCs expressed high levels of αSMA, which decreased after the differentiation into keratinocyte-like cells. Conclusion Our results suggest that the wound healing effect of KC-ADSCs depends primarily on re-epithelialization rather than wound contraction.
Collapse
Affiliation(s)
- Jonghun Kim
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshio Hasegawa
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Akino Wada
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Yuichiro Maeda
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Shigaku Ikeda
- Department of Dermatology and Allergology, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
| |
Collapse
|
4
|
Sierra-Sánchez Á, Kim KH, Blasco-Morente G, Arias-Santiago S. Cellular human tissue-engineered skin substitutes investigated for deep and difficult to heal injuries. NPJ Regen Med 2021; 6:35. [PMID: 34140525 PMCID: PMC8211795 DOI: 10.1038/s41536-021-00144-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 05/25/2021] [Indexed: 02/05/2023] Open
Abstract
Wound healing is an important function of skin; however, after significant skin injury (burns) or in certain dermatological pathologies (chronic wounds), this important process can be deregulated or lost, resulting in severe complications. To avoid these, studies have focused on developing tissue-engineered skin substitutes (TESSs), which attempt to replace and regenerate the damaged skin. Autologous cultured epithelial substitutes (CESs) constituted of keratinocytes, allogeneic cultured dermal substitutes (CDSs) composed of biomaterials and fibroblasts and autologous composite skin substitutes (CSSs) comprised of biomaterials, keratinocytes and fibroblasts, have been the most studied clinical TESSs, reporting positive results for different pathological conditions. However, researchers' purpose is to develop TESSs that resemble in a better way the human skin and its wound healing process. For this reason, they have also evaluated at preclinical level the incorporation of other human cell types such as melanocytes, Merkel and Langerhans cells, skin stem cells (SSCs), induced pluripotent stem cells (iPSCs) or mesenchymal stem cells (MSCs). Among these, MSCs have been also reported in clinical studies with hopeful results. Future perspectives in the field of human-TESSs are focused on improving in vivo animal models, incorporating immune cells, designing specific niches inside the biomaterials to increase stem cell potential and developing three-dimensional bioprinting strategies, with the final purpose of increasing patient's health care. In this review we summarize the use of different human cell populations for preclinical and clinical TESSs under research, remarking their strengths and limitations and discuss the future perspectives, which could be useful for wound healing purposes.
Collapse
Affiliation(s)
- Álvaro Sierra-Sánchez
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, Andalusian Network of Design and Translation of Advanced Therapies, Granada, Spain.
- Biosanitary Institute of Granada (ibs.GRANADA), Granada, Spain.
| | - Kevin H Kim
- Department of Dermatology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
| | - Gonzalo Blasco-Morente
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
| | - Salvador Arias-Santiago
- Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, Andalusian Network of Design and Translation of Advanced Therapies, Granada, Spain
- Biosanitary Institute of Granada (ibs.GRANADA), Granada, Spain
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada University, Granada, Spain
- Department of Dermatology, Faculty of Medicine, University of Granada, Granada, Spain
| |
Collapse
|
5
|
Safi R, Malek E, Nemer G, Sayed R, Eid E, Khalil S, Nasser N, Abbas O, Mohsen-Kanson T, Kurban M. Comparative characterization of sun exposed and sun protected skin-derived mesenchymal-like stem cells in variegate porphyria and healthy individuals. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2020; 37:202-213. [PMID: 33259115 DOI: 10.1111/phpp.12635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 10/24/2020] [Accepted: 11/24/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE We hypothesized that upon sun exposure, a sub-population of primary skin-derived mesenchymal-like cells is deleteriously affected and thus contribute to the chronic inflammatory state in autosomal recessive variegate porphyria patients. The aim of this study was to isolate and characterize the mesenchymal-like stem cells from different areas of the skin in a porphyria patient (sun exposed, SE, and sun protected, SP) and to compare them with cells from a healthy individual. METHODS The proliferation rate and the migration ability of SE and SP cells were evaluated in the presence of an antioxidant compound, N-acetylcysteine. A co-culture of SE-damaged cells with the conditioned medium from the enriched mesenchymal cell-like SP population was performed in order to regenerate the dermal injured tissue after sun exposure in patients. RESULTS Results showed that the percentage of CD105+ cells varies between 3.9% in SP and 5% in SE of the healthy individual and between 3.6% and 1.4% in SP and SE in the porphyria patient, respectively. The osteogenic differentiation potential was lower in the porphyria patient when compared to the control. Furthermore, the expression of stem cell markers was more pronounced in SE than in SP cells of both control and porphyria. The use of N-acetyl cysteine did not show any beneficial effects on porphyria SE cells. Treatment with SP-conditioned medium slightly increased the expression of stem cell markers in SE of porphyria patient. CONCLUSION In conclusion, the pool of mesenchymal stem-like SE cells is affected in variegate porphyria patient along with modification of their self-renewal and differentiation properties.
Collapse
Affiliation(s)
- Rémi Safi
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Elie Malek
- Faculty of Sciences, Biology Department, Lebanese University, Zahle, Lebanon
| | - Georges Nemer
- Faculty of Medicine, Biochemistry and Molecular Genetics Department, American University of Beirut, Beirut, Lebanon
| | - Reem Sayed
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Edward Eid
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Samar Khalil
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Nourhane Nasser
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Ossama Abbas
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon
| | - Tala Mohsen-Kanson
- Faculty of Sciences, Biology Department, Lebanese University, Zahle, Lebanon
| | - Mazen Kurban
- Faculty of Medicine, Dermatology Department, American University of Beirut, Beirut, Lebanon.,Faculty of Medicine, Biochemistry and Molecular Genetics Department, American University of Beirut, Beirut, Lebanon
| |
Collapse
|
6
|
Advances in the Research of Bioinks Based on Natural Collagen, Polysaccharide and Their Derivatives for Skin 3D Bioprinting. Polymers (Basel) 2020; 12:polym12061237. [PMID: 32485901 PMCID: PMC7362214 DOI: 10.3390/polym12061237] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/23/2020] [Accepted: 02/25/2020] [Indexed: 12/22/2022] Open
Abstract
The skin plays an important role in protecting the human body, and wound healing must be set in motion immediately following injury or trauma to restore the normal structure and function of skin. The extracellular matrix component of the skin mainly consists of collagen, glycosaminoglycan (GAG), elastin and hyaluronic acid (HA). Recently, natural collagen, polysaccharide and their derivatives such as collagen, gelatin, alginate, chitosan and pectin have been selected as the matrix materials of bioink to construct a functional artificial skin due to their biocompatible and biodegradable properties by 3D bioprinting, which is a revolutionary technology with the potential to transform both research and medical therapeutics. In this review, we outline the current skin bioprinting technologies and the bioink components for skin bioprinting. We also summarize the bioink products practiced in research recently and current challenges to guide future research to develop in a promising direction. While there are challenges regarding currently available skin bioprinting, addressing these issues will facilitate the rapid advancement of 3D skin bioprinting and its ability to mimic the native anatomy and physiology of skin and surrounding tissues in the future.
Collapse
|
7
|
Verma YK, Verma R, Singh AK, Gangenahalli G. LiCl Containing Thermosensitive Formulation Improves Hemostasis, Wound Healing, and Hair Regrowth. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2020. [DOI: 10.1007/s40883-020-00148-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
Ko UH, Choi J, Choung J, Moon S, Shin JH. Physicochemically Tuned Myofibroblasts for Wound Healing Strategy. Sci Rep 2019; 9:16070. [PMID: 31690789 PMCID: PMC6831678 DOI: 10.1038/s41598-019-52523-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 10/18/2019] [Indexed: 12/22/2022] Open
Abstract
Normal healing of skin wounds involves a complex interplay between many different cellular constituents, including keratinocytes, immune cells, fibroblasts, myofibroblasts, as well as extracellular matrices. Especially, fibroblasts play a critical role in regulating the immune response and matrix reconstruction by secreting many cytokines and matrix proteins. Myofibroblasts, which are differentiated form of fibroblasts, feature high cellular contractility and encourage the synthesis of matrix proteins to promote faster closure of the wounds. We focus on the functional characteristics of these myofibroblasts as the healing strategy for severe wounds where the surplus amount of matrix proteins could be beneficial for better regeneration. In this study, we first employed multiple physicochemical cues, namely topographical alignment, TGF-β1, and electrical field (EF), to induce differentiation of dermal fibroblasts into myofibroblasts, and to further activate the differentiated cells. We then used these cells in a mouse wound model to verify their potential as a transplantable substitute for the severe wound. Our results confirmed that physicochemically stimulated myofibroblasts promoted faster healing of the wound compared to the case with non-stimulated myofibroblasts through elevated matrix reconstruction in the mouse model. Conclusively, we propose the utilization of physicochemically tuned myofibroblasts as a novel strategy for promoting better healing of moderate to severe wounds.
Collapse
Affiliation(s)
- Ung Hyun Ko
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Jongjin Choi
- School of Medicine, Konkuk University, Seoul, Republic of Korea
- BYON Co. Ltd., Seoul, Republic of Korea
| | - Jinseung Choung
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sunghwan Moon
- School of Medicine, Konkuk University, Seoul, Republic of Korea.
| | - Jennifer H Shin
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
| |
Collapse
|
9
|
Wang X, Liu X, Zhao Y, Sun H, Wang Y. Cytoprotective role of S14G-humanin (HNG) in ultraviolet-B induced epidermal stem cells injury. Biomed Pharmacother 2019; 110:248-253. [DOI: 10.1016/j.biopha.2018.11.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 10/31/2018] [Accepted: 11/14/2018] [Indexed: 12/24/2022] Open
|
10
|
Macrin D, Joseph JP, Pillai AA, Devi A. Eminent Sources of Adult Mesenchymal Stem Cells and Their Therapeutic Imminence. Stem Cell Rev Rep 2018; 13:741-756. [PMID: 28812219 DOI: 10.1007/s12015-017-9759-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the recent times, stem cell biology has garnered the attention of the scientific fraternity and the general public alike due to the immense therapeutic potential that it holds in the field of regenerative medicine. A breakthrough in this direction came with the isolation of stem cells from human embryo and their differentiation into cell types of all three germ layers. However, the isolation of mesenchymal stem cells from adult tissues proved to be advantageous over embryonic stem cells due to the ethical and immunological naivety. Mesenchymal Stem Cells (MSCs) isolated from the bone marrow were found to differentiate into multiple cell lineages with the help of appropriate differentiation factors. Furthermore, other sources of stem cells including adipose tissue, dental pulp, and breast milk have been identified. Newer sources of stem cells have been emerging recently and their clinical applications are also being studied. In this review, we examine the eminent sources of Mesenchymal Stem Cells (MSCs), their immunophenotypes, and therapeutic imminence.
Collapse
Affiliation(s)
- Dannie Macrin
- Department of Genetic Engineering, SRM University, Kattankulathur, Tamil Nadu, India
| | - Joel P Joseph
- Department of Genetic Engineering, SRM University, Kattankulathur, Tamil Nadu, India
| | | | - Arikketh Devi
- Department of Genetic Engineering, SRM University, Kattankulathur, Tamil Nadu, India.
| |
Collapse
|
11
|
Chu GY, Chen YF, Chen HY, Chan MH, Gau CS, Weng SM. Stem cell therapy on skin: Mechanisms, recent advances and drug reviewing issues. J Food Drug Anal 2018; 26:14-20. [PMID: 29389549 PMCID: PMC9332639 DOI: 10.1016/j.jfda.2017.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/28/2017] [Accepted: 10/14/2017] [Indexed: 11/18/2022] Open
Abstract
Stem cell products and its clinical applications have been widely discussed in recent years, particularly when the Japanese “induced pluripotent stem cells” founder Dr. Yamanaka was awarded as Nobel Prize laureate in 2013. For decades, major progresses have been achieved in the stem cell biology field, and more and more evidence showed that skin stem cells are involved in the process of skin repair. Stem/progenitor cells of the epidermis are recognized to play the most essential role in the tissue regeneration of skin. In this review, we first illustrated basic stem cell characteristics and various stem cell subtypes resided in the skin. Second, we provided several literatures to elucidate how stem/progenitor cells collaborate in the process of skin repair with the evidence from animal model studies and in vitro experiments. Third, we also introduced several examples of skin cell products on the pharmaceutic market and the ongoing clinical trials aiming for unmet medical difficulties of skin. Last but not least, we summarized general reviewing concerns and some disputatious issues on dermatological cell products. With this concise review, we hope to provide further beneficial suggestions for the development of more effective and safer dermatological stem/progenitor cell products in the future.
Collapse
Affiliation(s)
- Gong-Yau Chu
- Center for Drug Evaluation, Taipei 11557,
Taiwan
- Department of Dermatology, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei 11101,
Taiwan
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221,
Taiwan
- Department of Dermatology, Kang-Ning General Hospital, Taipei 11490,
Taiwan
| | - Yu-Fu Chen
- Department of Speech Language Pathology and Audiology, National Taipei University of Nursing and Health Sciences, Taipei 11219,
Taiwan
| | | | | | | | - Shih-Ming Weng
- Center for Drug Evaluation, Taipei 11557,
Taiwan
- Department of Speech Language Pathology and Audiology, National Taipei University of Nursing and Health Sciences, Taipei 11219,
Taiwan
- Corresponding author. 3F No. 465, Sec. 6, Zhongxiao E. Rd., Taipei 11557, Taiwan. E-mail address: (S.-M. Weng)
| |
Collapse
|
12
|
Campanati A, Consales V, Orciani M, Giuliodori K, Ganzetti G, Bobyr I, Sorgentoni G, di Primio R, Offidani A. Role of mesenchymal stem cells in the pathogenesis of psoriasis: current perspectives. PSORIASIS-TARGETS AND THERAPY 2017; 7:73-85. [PMID: 29387610 PMCID: PMC5774609 DOI: 10.2147/ptt.s108311] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mesenchymal stem cells (MSCs) are multipotent nonhematopoietic stromal cells studied for their properties and importance in management of several skin diseases. This review collects and analyzes the emerging published data, which describe the function of MSCs in the pathogenesis of psoriasis.
Collapse
Affiliation(s)
- Anna Campanati
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Veronica Consales
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Monia Orciani
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Katia Giuliodori
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Giulia Ganzetti
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Ivan Bobyr
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Giulia Sorgentoni
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Roberto di Primio
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| | - Annamaria Offidani
- Dermatological Clinic, Department of Clinical and Molecular Sciences, Polytechnic Marche University, Ancona, Italy
| |
Collapse
|
13
|
Bierhalz AC, Moraes ÂM. Composite membranes of alginate and chitosan reinforced with cotton or linen fibers incorporating epidermal growth factor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:287-294. [DOI: 10.1016/j.msec.2017.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 12/13/2016] [Accepted: 03/02/2017] [Indexed: 01/16/2023]
|
14
|
|
15
|
|
16
|
Kim KH, Blasco-Morente G, Cuende N, Arias-Santiago S. Mesenchymal stromal cells: properties and role in management of cutaneous diseases. J Eur Acad Dermatol Venereol 2016; 31:414-423. [PMID: 27549663 DOI: 10.1111/jdv.13934] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 07/28/2016] [Indexed: 12/18/2022]
Abstract
This review describes the current understanding and the potential use of mesenchymal stromal cells (MSCs) in cell-based therapies for clinical management of difficult wounds and other dermatoses. MSCs have been shown to possess many advantageous properties that make them a promising therapeutic modality in dermatology still under investigation. In fact, MSCs' ability to promote wound healing through its paracrine function and pro-angiogenic properties have generated increasing interest for treating acute and chronic wounds. There is also great interest in utilizing MSCs' immunological characteristics for therapeutic use especially for patients with debilitating systemic autoimmune and inflammatory skin conditions who have failed other therapies. Its role in aesthetics has also been explored with clinical data showing improvement of acne scars and wrinkles from photoaging. Clinical trials are underway investigating the safety and efficacy of MSCs in the treatment of different skin conditions such as acute burns, diabetic and venous stasis ulcers, epidermolysis bullosa and systemic sclerosis, among others. We anticipate that as our understanding of the characteristics and function of MSCs grow, so will its role in cell-based treatments of dermatological conditions.
Collapse
Affiliation(s)
- K H Kim
- Department of Dermatology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - G Blasco-Morente
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada, Spain
| | - N Cuende
- Andalusian Initiative for Advanced Therapies, Seville, Spain
| | - S Arias-Santiago
- Department of Dermatology, Virgen de las Nieves University Hospital, Granada, Spain.,Cell Production and Tissue Engineering Unit, Virgen de las Nieves University Hospital, Granada, Spain
| |
Collapse
|
17
|
Epidermal stem cells (ESCs) accelerate diabetic wound healing via the Notch signalling pathway. Biosci Rep 2016; 36:BSR20160034. [PMID: 27129289 PMCID: PMC4974596 DOI: 10.1042/bsr20160034] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/22/2016] [Indexed: 01/08/2023] Open
Abstract
Epidermal stem cells (ESCs) accelerate diabetic wound healing via the Notch signalling pathway. Chronic, non-healing wounds are a major complication of diabetes. Recently, various cell therapies have been reported for promotion of diabetic wound healing. Epidermal stem cells (ESCs) are considered a powerful tool for tissue therapy. However, the effect and the mechanism of the therapeutic properties of ESCs in the diabetic wound healing are unclear. Herein, to determine the ability of ESCs to diabetic wound healing, a dorsal skin defect in a streptozotocin (STZ)-induced diabetes mellitus (DM) mouse model was used. ESCs were isolated from mouse skin. We found that both the mRNA and protein levels of a Notch ligand Jagged1 (Jag1), Notch1 and Notch target gene Hairy Enhancer of Split-1 (Hes1) were significantly increased at the wound margins. In addition, we observed that Jag1 was high expressed in ESCs. Overexpression of Jag1 promotes ESCs migration, whereas knockdown Jag1 resulted in a significant reduction in ESCs migration in vitro. Importantly, Jag1 overexpression improves diabetic wound healing in vivo. These results provide evidence that ESCs accelerate diabetic wound healing via the Notch signalling pathway, and provide a promising potential for activation of the Notch pathway for the treatment of diabetic wound.
Collapse
|
18
|
Cell-based regenerative strategies for treatment of diabetic skin wounds, a comparative study between human umbilical cord blood-mononuclear cells and calves' blood haemodialysate. PLoS One 2014; 9:e89853. [PMID: 24643010 PMCID: PMC3958350 DOI: 10.1371/journal.pone.0089853] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 01/25/2014] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Diabetes-related foot problems are bound to increase. However, medical therapies for wound care are limited; therefore, the need for development of new treatment modalities to improve wound healing in diabetic patients is essential and constitutes an emerging field of investigation. METHODS Animals were randomly divided into 8 groups (I-VIII) (32 rats/group), all were streptozotocin (STZ)-induced diabetics except groups III and VIII were non-diabetic controls. The study comprised two experiments; the first included 3 groups. Group I injected with mononuclear cells (MNCs) derived from human umbilical cord blood (HUCB), group II a diabetic control group (PBS i.v). The second experiment included 5 groups, groups IV, V, and VI received topical HUCB-haemodialysate (HD), calves' blood HD, and solcoseryl, respectively. Group VII was the diabetic control group (topical saline). Standard circular wounds were created on the back of rats. A sample of each type of HD was analyzed using the high performance liquid chromatography-electrospray ionization-mass spectrometry (HPLC-ESI-MS) system. Wound area measurement and photography were carried out every 4 days. Plasma glucose, catalase (CAT), malondialdehyde (MDA), nitric oxide (NO) and platelets count were assessed. Wound samples were excised for hydroxyproline (HP) and histopathological study. RESULTS Treatment with HUCB MNCs or HUCB-HD resulted in wound contraction, increased CAT, NO, platelets count, body weights, and HP content, and decreased MDA and glucose. CONCLUSION Systemic administration of HUCB MNCs and topical application of the newly prepared HUCB-HD or calves' blood HD significantly accelerated the rate of diabetic wound healing and would open the possibility of their future use in regenerative medicine.
Collapse
|
19
|
Gao L, Liu F, Tan L, Liu T, Chen Z, Shi C. The immunosuppressive properties of non-cultured dermal-derived mesenchymal stromal cells and the control of graft-versus-host disease. Biomaterials 2014; 35:3582-8. [PMID: 24468404 DOI: 10.1016/j.biomaterials.2014.01.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/07/2014] [Indexed: 12/29/2022]
Abstract
Mesenchymal stromal cells (MSCs) have been developed for the prevention and treatment of graft-versus-host disease (GVHD). Non-cultured natural MSCs are considered ideal, as they better maintain their biological and therapeutic properties. The skin is the largest organ in the body and constitutes an interesting alternative to bone marrow for the generation of MSCs. Large numbers of dermal-derived-MSCs (DMSCs) can be easily generated without culturing in vitro, but their therapeutic effects still remain unclear. In this study, we described for the first time the use of non-cultured DMSCs for controlling GVHD in an MHC-mismatched mouse model and investigated their immunomodulatory effects. Our results showed that non-cultured mouse DMSCs decreased the incidence and severity of acute GVHD during MHC-mismatched stem cell transplantation in mice. This effect was mediated by the inhibition of splenic cell (SPC) proliferation and the enhancement of Treg cells. Consistent with the results in vivo, the results in vitro showed that human DMSCs inhibited the proliferation of peripheral blood mononuclear cells (PBMCs) by inhibiting the proliferation of CD3(+) T cells. hDMSCs prevented PBMCs from entering S phase, suppressed the activation of CD3(+) T cells and increased Treg proportions. In conclusion, DMSCs should be considered as a novel MSC source for the control of refractory GVHD.
Collapse
Affiliation(s)
- Li Gao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China; Department of Hematology, Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, China
| | - Fei Liu
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China
| | - Li Tan
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China
| | - Tao Liu
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China
| | - Zelin Chen
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China
| | - Chunmeng Shi
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, 30 Gaotanyan Road, Chongqing 400038, China.
| |
Collapse
|
20
|
Lu W, Zhang YJ, Jin Y. Potential of stem cells for skin regeneration following burns. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/edm.09.9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
21
|
Katsuda T, Kosaka N, Takeshita F, Ochiya T. The therapeutic potential of mesenchymal stem cell-derived extracellular vesicles. Proteomics 2013; 13:1637-53. [PMID: 23335344 DOI: 10.1002/pmic.201200373] [Citation(s) in RCA: 316] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 10/04/2012] [Accepted: 10/22/2012] [Indexed: 12/13/2022]
Abstract
Extracellular vesicles (EVs), membrane vesicles that are secreted by a variety of mammalian cell types, have been shown to play an important role in intercellular communication. The contents of EVs, including proteins, microRNAs, and mRNAs, vary according to the cell type that secreted them. Accordingly, researchers have demonstrated that EVs derived from various cell types play different roles in biological phenomena. Considering the ubiquitous presence of mesenchymal stem cells (MSCs) in the body, MSC-derived EVs may take part in a wide range of events. In particular, MSCs have recently attracted much attention due to the therapeutic effects of their secretory factors. MSC-derived EVs may therefore provide novel therapeutic approaches. In this review, we first summarize the wide range of functions of EVs released from different cell types, emphasizing that EVs echo the phenotype of their parent cell. Then, we describe the various therapeutic effects of MSCs and pay particular attention to the significance of their paracrine effect. We then survey recent reports on MSC-derived EVs and consider the therapeutic potential of MSC-derived EVs. Finally, we discuss remaining issues that must be addressed before realizing the practical application of MSC-derived EVs, and we provide some suggestions for enhancing their therapeutic efficiency.
Collapse
Affiliation(s)
- Takeshi Katsuda
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | | | | | | |
Collapse
|
22
|
Gola M, Czajkowski R, Bajek A, Dura A, Drewa T. Melanocyte stem cells: biology and current aspects. Med Sci Monit 2013; 18:RA155-9. [PMID: 23018363 PMCID: PMC3560550 DOI: 10.12659/msm.883475] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Epidermal stem cells have become an object of intensive research. The epidermis constitutes one of the main sources of stem cells and is a tissue of choice for use in exploring their biology. Stratified squamous epithelium (epidermis) possesses the capacity for self-renewal and repair due to the presence of epidermal stem cells (ESC). They have been identified within basal layer of the interfollicular epidermis (IFE), in the “bulge” of the hair follicles of rodents, and also in the human follicular bulge. Melanocyte stem cells (MSC) from hair follicles (precisely from the bulge region, which also contains epidermal stem cells) provide an attractive model for the study of stem cells and their regulation at the niche. This review summarizes the rapidly developing field of epidermal stem cell research and their application in regenerative medicine, paying particular attention to melanocyte stem cells, their biology and some of the processes that occur during hair graying and regeneration of the pigmentary system, as well as discussing how aged-associated changes in the melanocyte stem cells compartment impact hair graying. This review also includes differentiation of human skin stem cells into functional epidermal melanocytes.
Collapse
Affiliation(s)
- Monika Gola
- Department of Tissue Engineering, Nicolaus Copernicus University, Bydgoszcz, Poland
| | | | | | | | | |
Collapse
|
23
|
Mesenchymal stem cell-like cells from children foreskin inhibit the growth of SGC-7901 gastric cancer cells. Exp Mol Pathol 2013; 94:430-7. [PMID: 23421973 DOI: 10.1016/j.yexmp.2013.02.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 01/07/2013] [Accepted: 02/08/2013] [Indexed: 12/26/2022]
Abstract
Mesenchymal stem cells (MSCs) become a research hotspot in recent years because of their roles in regenerative medicine and tissue injury repair. However, the limited source for MSCs hampers its clinical application. In this study, we isolated and identified human mesenchymal stem cell-like cells from foreskin (hFMSCs) by explant culture. HFMSCs had similar morphology and immunophenotype to that of human bone marrow derived-mesenchymal stem cells. HFMSCs formed colonies after 9 days of inoculation and could be propagated for more than 50 passages. HFMSCs had a normal karyotype and high G0/G1 phase independent of passage number. Further, hFMSCs could be induced to differentiate into osteocytes and adipocytes. We found that the growth of SGC-7901 (human gastric adenocarcinoma) cells could be suppressed by simultaneous injection of hFMSCs in vivo. HFMSCs also inhibited SGC-7901 cell proliferation in vitro. HFMSC co-injection resulted in a decrease in PCNA-positive and an increase in apoptotic tumor cells. HFMSCs derived conditioned medium inhibited the expression of BCL-2 while increased the expression of BAX and caspase-3 in SGC-7901 cells. Taken together, our findings suggest that children foreskin is a new source for MSCs and hFMSCs could inhibit gastric cancer cell growth both in vitro and in vivo.
Collapse
|
24
|
de la Puente P, Ludeña D, López M, Ramos J, Iglesias J. Differentiation within autologous fibrin scaffolds of porcine dermal cells with the mesenchymal stem cell phenotype. Exp Cell Res 2013; 319:144-52. [DOI: 10.1016/j.yexcr.2012.10.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 10/17/2012] [Accepted: 10/20/2012] [Indexed: 10/27/2022]
|
25
|
Vatansever HS, Uluer ET, Aydede H, Ozbilgin MK. Analysis of transferred keratinocyte-like cells derived from mouse embryonic stem cells on experimental surgical skin wounds of mouse. Acta Histochem 2013; 115:32-41. [PMID: 22494612 DOI: 10.1016/j.acthis.2012.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 03/14/2012] [Accepted: 03/15/2012] [Indexed: 10/28/2022]
Abstract
Autologous/allogenic skin grafts constituted from differentiated adult or embryonic stem cells can be used in treatment of skin disorders. In our study we aimed to differentiate keratinocytes from mouse embryonic stem cells and the transfer of viable keratinocyte-like cells to a model of surgical skin wound of mouse. Embryoid bodies, derived from mouse embryonic stem cells, were cultured on basement membrane matrix with added BMP-4 for 10 days. The identification of differentiated keratinocyte-like cells was done by detection of cytokeratin-8 and cytokeratin-14 localization using an indirect immunoperoxidase technique and transmission electron microscopy evaluation. Distribution of BrdU, cytokeratin-8 and cytokeratin-14 were evaluated using an indirect immunoperoxidase technique from the experimental (dressing including BrdU labelled cells applied after the surgical wound was created on mouse), control (only the surgical wound was created on mouse) and sham (only the dressing applied after the surgical wound was created on mouse) in groups after 3, 5 and 7 days. Immunohistochemically and ultrastructurally, cells derived from mouse embryonic stem cells were similar to differentiated keratinocyte-like cells. Differentiated keratinocyte-like cells were demonstrated by positive BrdU, cytokeratin-8 and cytokeratin-14 staining after transfer to the wound area. In the experimental group wound healing was better after transferring differentiated keratinocytes when compared to the sham and control groups. In vivo continuity and usability of derived cells are very important issues. In wound repair mechanisms, keratinocyte-like cells could provide positive effects during the wound healing and could be used in clinical treatments of wound repair process.
Collapse
|
26
|
Argôlo Neto NM, Del Carlo RJ, Monteiro BS, Nardi NB, Chagastelles PC, de Brito AFS, Reis AMS. Role of autologous mesenchymal stem cells associated with platelet-rich plasma on healing of cutaneous wounds in diabetic mice. Clin Exp Dermatol 2012; 37:544-53. [PMID: 22712860 DOI: 10.1111/j.1365-2230.2011.04304.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Chronic cutaneous lesions affect 15% of human patients with diabetes, and the associated risk of limb amputations is 15-46 times greater than that of people with normal glycaemia. It is estimated that half of these limb amputations could be avoided by opportune treatment with somatic stem cells or platelet-rich plasma (PRP). METHODS We evaluated the effects of autologous transplant of mesenchymal stem cells (MSCs) with or without combination with autologous PRP in the re-epithelialization of cutaneous lesions induced in diabetic mice. RESULTS Animals treated with MSCs alone showed a similar level of re-epithelialization of cutaneous lesions to those treated with MSC plus PRP, and no significant difference was found between the two treatments. CONCLUSION Both treatments gave better results than daily cleaning of the cutaneous lesions with saline or covering of the lesions with semipermeable adherent bandage.
Collapse
Affiliation(s)
- N M Argôlo Neto
- Department of Veterinary Medicine, Federal University of Piauí, Teresina, Brazil.
| | | | | | | | | | | | | |
Collapse
|
27
|
Byun JH, Kang EJ, Park SC, Kang DH, Choi MJ, Rho GJ, Park BW. Isolation of human mesenchymal stem cells from the skin and their neurogenic differentiation in vitro. J Korean Assoc Oral Maxillofac Surg 2012. [DOI: 10.5125/jkaoms.2012.38.6.343] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Jun-Ho Byun
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Eun-Ju Kang
- OBS/Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju, Korea
| | - Seong-Cheol Park
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Dong-Ho Kang
- Department of Neurosurgery, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Mun-Jeong Choi
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Gyu-Jin Rho
- OBS/Theriogenology and Biotechnology, College of Veterinary Medicine, Gyeongsang National University, Jinju, Korea
| | - Bong-Wook Park
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| |
Collapse
|
28
|
Abstract
There are many similarities between health issues affecting military and civilian patient populations, with the exception of the relatively small but vital segment of active soldiers who experience high-energy blast injuries during combat. A rising incidence of major injuries from explosive devices in recent campaigns has further complicated treatment and recovery, highlighting the need for tissue regenerative options and intensifying interest in the possible role of stem cells for military medicine. In this review we outline the array of tissue-specific injuries typically seen in modern combat - as well as address a few complications unique to soldiers - and discuss the state of current stem cell research in addressing each area. Embryonic, induced-pluripotent and adult stem cell sources are defined, along with advantages and disadvantages unique to each cell type. More detailed stem cell sources are described in the context of each tissue of interest, including neural, cardiopulmonary, musculoskeletal and sensory tissues, with brief discussion of their potential role in regenerative medicine moving forward. Additional commentary is given to military stem cell applications aside from regenerative medicine, such as blood pharming, immunomodulation and drug screening, with an overview of stem cell banking and the unique opportunity provided by the military and civilian overlap of stem cell research.
Collapse
Affiliation(s)
- Gregory T Christopherson
- The National Institutes of Health, The National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD 20892, USA
| | | |
Collapse
|
29
|
Shi C, Lu S. Radiation Injuries. INT J LOW EXTR WOUND 2011; 10:120-1. [DOI: 10.1177/1534734611418155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Chunmeng Shi
- Third Military Medical University, Chongqing, China
| | - Shuliang Lu
- Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
30
|
Steinert AF, Kunz M, Prager P, Barthel T, Jakob F, Nöth U, Murray MM, Evans CH, Porter RM. Mesenchymal stem cell characteristics of human anterior cruciate ligament outgrowth cells. Tissue Eng Part A 2011; 17:1375-88. [PMID: 21247268 PMCID: PMC3079172 DOI: 10.1089/ten.tea.2010.0413] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 01/18/2011] [Indexed: 12/19/2022] Open
Abstract
When ruptured, the anterior cruciate ligament (ACL) of the human knee has limited regenerative potential. However, the goal of this report was to show that the cells that migrate out of the human ACL constitute a rich population of progenitor cells and we hypothesize that they display mesenchymal stem cell (MSC) characteristics when compared with adherent cells derived from bone marrow or collagenase digests from ACL. We show that ACL outgrowth cells are adherent, fibroblastic cells with a surface immunophenotype strongly positive for cluster of differentiation (CD)29, CD44, CD49c, CD73, CD90, CD97, CD105, CD146, and CD166, weakly positive for CD106 and CD14, but negative for CD11c, CD31, CD34, CD40, CD45, CD53, CD74, CD133, CD144, and CD163. Staining for STRO-1 was seen by immunohistochemistry but not flow cytometry. Under suitable culture conditions, the ACL outgrowth-derived MSCs differentiated into chondrocytes, osteoblasts, and adipocytes and showed capacity to self-renew in an in vitro assay of ligamentogenesis. MSCs derived from collagenase digests of ACL tissue and human bone marrow were analyzed in parallel and displayed similar, but not identical, properties. In situ staining of the ACL suggests that the MSCs reside both aligned with the collagenous matrix of the ligament and adjacent to small blood vessels. We conclude that the cells that emigrate from damaged ACLs are MSCs and that they have the potential to provide the basis for a superior, biological repair of this ligament.
Collapse
Affiliation(s)
- Andre F Steinert
- Department of Orthopaedic Surgery, König-Ludwig-Haus, Orthopaedic Center for Musculoskeletal Research, Julius-Maximilians-University, Würzburg, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ock SA, Jeon BG, Rho GJ. Comparative characterization of porcine mesenchymal stem cells derived from bone marrow extract and skin tissues. Tissue Eng Part C Methods 2011; 16:1481-91. [PMID: 20486783 DOI: 10.1089/ten.tec.2010.0149] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Mesenchymal stem cells (MSCs) offer a great promise for regenerative medicine. Present study compared the characterization of porcine MSCs (pMSCs) derived from bone marrow extract with adult ear and fetal skin-derived cells on morphology, cell growth, alkaline phosphatase activity, proliferation ability, expression of cluster of differentiation (CD) markers (CD29, 45, and 90), cell cycle, protein and mRNA levels of Oct-4, Sox-2, and Nanog, and lineage differentiation ability. Skin-derived cells exhibited alkaline phosphatase activity and differentiation ability like pMSCs. pMSCs possessed a longer doubling time than skin-derived cells, and there was no difference in the ratio of G0/G1 phase between pMSCs and skin-derived cells. Except for CD29 and 90, all cells were found negative for CD45. Protein and mRNA expression of Oct-4, Sox-2 and Nanog were observed with similar intensity in all cells. Taken together, pMSCs and skin-derived cells revealed similar characteristics, and suggested the possible supportive role of skin-derived cells with MSCs for the regeneration of damaged tissues in cell-based therapies.
Collapse
Affiliation(s)
- Sun-A Ock
- College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | | | | |
Collapse
|
32
|
Park BW, Kang DH, Kang EJ, Byun JH, Lee JS, Maeng GH, Rho GJ. Peripheral nerve regeneration using autologous porcine skin-derived mesenchymal stem cells. J Tissue Eng Regen Med 2011; 6:113-24. [PMID: 21337707 DOI: 10.1002/term.404] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Accepted: 11/30/2010] [Indexed: 12/23/2022]
Abstract
Porcine skin-derived mesenchymal stem cells (pSMSCs) were evaluated on their biological MSC characterizations and differentiation into mesenchymal lineages, along with in vitro and in vivo neural inductions. Isolated pSMSCs showed plate-adherent growth, expression of various MSC-marker proteins and transcriptional factors, and differentiation potential into mesenchymal lineages. Neuron-like cell morphology and various neural markers were highly detected at 6 h and 24 h after in vitro neural induction of pSMSCs, but their neuron-like characteristics disappeared as induction time extended to 48 and 72 h. To evaluate the in vivo peripheral nerve regeneration potential of pSMSCs, a total of 5 × 10(6) autologous pSMSCs labelled with tracking dye, supplemented with fibrin glue scaffold and collagen tubulization, were transplanted into the peripheral nerve defected miniature pigs. At 2 and 4 weeks after cell transplantation, well-preserved transplanted cells and remarkable in vivo nerve regeneration, including histologically complete nerve bundles, were observed in the regenerated nerve tissues. Moreover, S-100 protein and p75 nerve growth factor receptor were more highly detected in regenerated nerve fibres compared to non-cell grafted control fibres. These results suggest that autologous pSMSCs transplanted with fibrin glue scaffold can induce prominent nerve regeneration in porcine peripheral nerve defect sites.
Collapse
Affiliation(s)
- Bong-Wook Park
- Department of Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
33
|
Sellheyer K, Krahl D. Skin mesenchymal stem cells: Prospects for clinical dermatology. J Am Acad Dermatol 2010; 63:859-65. [DOI: 10.1016/j.jaad.2009.09.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Revised: 08/28/2009] [Accepted: 09/14/2009] [Indexed: 01/09/2023]
|
34
|
|
35
|
Ramanauskaitė G, Kašėta V, Vaitkuvienė A, Biziulevičienė G. Skin regeneration with bone marrow-derived cell populations. Int Immunopharmacol 2010; 10:1548-51. [PMID: 20868755 DOI: 10.1016/j.intimp.2010.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 09/06/2010] [Accepted: 09/07/2010] [Indexed: 10/19/2022]
Abstract
Bone marrow-derived cells of distinct differentiation level could differently influence the process of skin regeneration. The results of our study revealed that hematopoietic stem cells (HSC) population influenced the repair of injured tissue slower in comparison with lineage negative (lin⁻) cell population containing not only HSC but also cell progenitors of different differentiation levels. Wound healing process was faster in lin⁻) cell suspension treated group, the stage of proliferation was more intensive and increased number of skin appendages occurred. The adaptation of purified HSC at the site of injury was longer and the stages of wound healing took place later. The results obtained show that in further experiments the complex procedure of HSC isolation and purification could be shortened and heavy skin injuries could be successfully treated with the help of lin⁻ cell population.
Collapse
Affiliation(s)
- Giedrė Ramanauskaitė
- State Research Institute Center for Innovative Medicine, 9 Žygimantų Street, LT-01102 Vilnius, Lithuania
| | | | | | | |
Collapse
|
36
|
Agay D, Scherthan H, Forcheron F, Grenier N, Hérodin F, Meineke V, Drouet M. Multipotent mesenchymal stem cell grafting to treat cutaneous radiation syndrome: development of a new minipig model. Exp Hematol 2010; 38:945-56. [PMID: 20600578 DOI: 10.1016/j.exphem.2010.06.008] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 06/10/2010] [Accepted: 06/21/2010] [Indexed: 01/09/2023]
Abstract
OBJECTIVE Cutaneous radiation syndrome (CRS) is the delayed consequence of localized skin exposure to high doses of ionizing radiation. Recent grafting of three ionizing radiation-burned patients has suggested the benefit of local bone marrow mesenchymal stem cell (MSC) injection in favor of wound healing and pain control. Here, we have developed a new minipig model of severe CRS to study underlying mechanisms of this cell therapy approach. MATERIALS AND METHODS Göttingen minipigs were locally irradiated using a (60)Co gamma source as follows: ungrafted 50 and 60 Gy (n = 4) and grafted 50 and 60 Gy (n = 3). Bone marrow MSCs were cultured in minimum essential medium with 10% fetal calf serum and basic fibroblast growth factor (2 ng.mL(-1)). Autologous MSCs were intradermally injected twice or three times from days 27 to 96 (range, 99-128.5 × 10(6) MSCs per injection). RESULTS All animals exhibited a clinical evolution similar to humans after a latency phase of several weeks, including early erythema, hair loss, and dry/moist desquamation followed by necrosis during 81 to 222 days post-ionizing radiation. Skin damage in higher exposed animals appeared slightly earlier. Immunohistology revealed severe skin damage in all animals and rhabdomyolysis in the muscle tissue below the entry area, with the latter being more severe in controls. In grafted animals, MSCs led to local accumulation of lymphocytes at the dermis/subcutis border and improved vascularization. CONCLUSIONS This study establishes a new minipig model that is close to human and allows development of stem cell therapy strategies that can be applied in treatment of human radiation burns.
Collapse
Affiliation(s)
- Diane Agay
- IRBA-antenne La Tronche-CRSSA, La Tronche, France
| | | | | | | | | | | | | |
Collapse
|
37
|
Kang EJ, Byun JH, Choi YJ, Maeng GH, Lee SL, Kang DH, Lee JS, Rho GJ, Park BW. In vitro and in vivo osteogenesis of porcine skin-derived mesenchymal stem cell-like cells with a demineralized bone and fibrin glue scaffold. Tissue Eng Part A 2010; 16:815-27. [PMID: 19778183 DOI: 10.1089/ten.tea.2009.0439] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In vitro and in vivo osteogenesis of skin-derived mesenchymal stem cell-like cells (SDMSCs) with a demineralized bone (DMB) and fibrin glue scaffold were compared. SDMSCs isolated from the ears of adult miniature pigs were evaluated for the expression of transcriptional factors (Oct-4, Sox-2, and Nanog) and MSC marker proteins (CD29, CD44, CD90, and vimentin). The isolated SDMSCs were cocultured in vitro with a mixed DMB and fibrin glue scaffold in a nonosteogenic medium for 1, 2, and 4 weeks. Osteonectin, osteocalcin, and Runx2 were expressed during the culture period and reached maximum at 2 weeks after in vitro coculture. von Kossa-positive bone minerals were also noted in the cocultured medium at 4 weeks. Autogenous porcine SDMSCs (1 x 10(7)) labeled with a tracking dye, PKH26, were grafted into the maxillary sinus with a DMB and fibrin glue scaffold. In the contralateral side, only a scaffold was grafted without SDMSCs (control). In vivo osteogenesis was evaluated from two animals euthanized at 2 and 4 weeks after grafting. In vivo PKH26 staining was detected in all the specimens at both time points. Trabecular bone formation and osteocalcin expression were more pronounced around the grafted materials in the SDMSC-grafted group compared with the control group. New bone generation was initiated from the periphery to the center of the grafted material. The number of proliferating cells increased over time and reached a peak at 4 weeks in both in vivo and in vitro specimens. These findings suggest that autogenous SDMSC grafting with a DMB and fibrin glue scaffold can serve as a predictable alternative to bone grafting in the maxillary sinus floor.
Collapse
Affiliation(s)
- Eun-Ju Kang
- College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Byun JH, Kang EJ, Maeng GH, Rho GJ, Kang DH, Lee JS, Park BW. Maxillary sinus floor elevation using autogenous skin-derived mesenchymal stem cells in miniature pigs. J Korean Assoc Oral Maxillofac Surg 2010. [DOI: 10.5125/jkaoms.2010.36.2.87] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- June-Ho Byun
- Department Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Eun-Ju Kang
- College of Veterinary Medicine, Gyeongsang National University, Jinju, Korea
| | - Geun-Ho Maeng
- College of Veterinary Medicine, Gyeongsang National University, Jinju, Korea
| | - Gyu-Jin Rho
- College of Veterinary Medicine, Gyeongsang National University, Jinju, Korea
| | - Dong-Ho Kang
- Department of Neurosurgery, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Jong-Sil Lee
- Department of Pathology, School of Medicine, Gyeongsang National University, Jinju, Korea
| | - Bong-Wook Park
- Department Oral and Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| |
Collapse
|
39
|
Beta2-microglobulin: emerging as a promising cancer therapeutic target. Drug Discov Today 2008; 14:25-30. [PMID: 19056512 DOI: 10.1016/j.drudis.2008.11.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Revised: 10/14/2008] [Accepted: 11/04/2008] [Indexed: 12/17/2022]
Abstract
Beta2-microglobulin, a MHC class I subunit, is found to act similarly to a prototypical oncogenic factor capable of stimulating growth and progression of various cancers and plays a key regulatory role in stimulating cancer bone metastasis. Free beta2M in serum or urine has been regarded as an independent biomarker in several cancers. Specific antibodies to beta2M have remarkable tumoricidal activity for both solid tumors and blood malignancies and are shown to be selective to tumor cells, but caused no toxicity in normal cells. These surprising data strongly suggest that beta2M is a promising new therapeutic target for human cancers.
Collapse
|
40
|
Sullivan JC, Sher D, Eisenstein M, Shigesada K, Reitzel AM, Marlow H, Levanon D, Groner Y, Finnerty JR, Gat U. The evolutionary origin of the Runx/CBFbeta transcription factors--studies of the most basal metazoans. BMC Evol Biol 2008; 8:228. [PMID: 18681949 PMCID: PMC2527000 DOI: 10.1186/1471-2148-8-228] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Accepted: 08/05/2008] [Indexed: 11/17/2022] Open
Abstract
Background Members of the Runx family of transcriptional regulators, which bind DNA as heterodimers with CBFβ, are known to play critical roles in embryonic development in many triploblastic animals such as mammals and insects. They are known to regulate basic developmental processes such as cell fate determination and cellular potency in multiple stem-cell types, including the sensory nerve cell progenitors of ganglia in mammals. Results In this study, we detect and characterize the hitherto unexplored Runx/CBFβ genes of cnidarians and sponges, two basal animal lineages that are well known for their extensive regenerative capacity. Comparative structural modeling indicates that the Runx-CBFβ-DNA complex from most cnidarians and sponges is highly similar to that found in humans, with changes in the residues involved in Runx-CBFβ dimerization in either of the proteins mirrored by compensatory changes in the binding partner. In situ hybridization studies reveal that Nematostella Runx and CBFβ are expressed predominantly in small isolated foci at the base of the ectoderm of the tentacles in adult animals, possibly representing neurons or their progenitors. Conclusion These results reveal that Runx and CBFβ likely functioned together to regulate transcription in the common ancestor of all metazoans, and the structure of the Runx-CBFβ-DNA complex has remained extremely conserved since the human-sponge divergence. The expression data suggest a hypothesis that these genes may have played a role in nerve cell differentiation or maintenance in the common ancestor of cnidarians and bilaterians.
Collapse
Affiliation(s)
- James C Sullivan
- Department of Biology, Boston University, 5 Cummington St, Boston, MA 02215, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Herdrich B, Lind R, Liechty K. Multipotent adult progenitor cells: their role in wound healing and the treatment of dermal wounds. Cytotherapy 2008; 10:543-50. [DOI: 10.1080/14653240802345820] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
42
|
Shi C, Mai Y, Zhu Y, Cheng T, Su Y. Spontaneous transformation of a clonal population of dermis-derived multipotent cells in culture. In Vitro Cell Dev Biol Anim 2007; 43:290-6. [PMID: 17876677 DOI: 10.1007/s11626-007-9056-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 07/28/2007] [Indexed: 10/22/2022]
Abstract
It is reported that adult multipotent stem cells can undergo spontaneous transformation after long-term in vitro culture. Understanding the molecular mechanisms involved in this spontaneous transformation process can help in the design of future therapeutic applications. By far, the transformation process of adult multipotent stem cell is not well understood. In this study, a tumorigenic cell line nominated TDMC1 was established from a clonal population of rat dermis-derived multipotent cells (DMCs) following spontaneous transformation in culture. The transformed cells could produce tumors with characteristics of fibrous histocytoma when they are inoculated subcutaneously into nude mice. The molecular profiles of the nontransformed DMCs and transformed cells were analyzed by a deoxyribonucleic acid microarray. Our results showed that the overactivation of the K-ras/mitogen-activated protein kinase kinase signaling pathway played an important role in the transformation process. These data may be helpful to explain, at least in part, the possible mechanism for the malignant transformation of adult multipotent cells.
Collapse
Affiliation(s)
- Chunmeng Shi
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing 400038, People's Republic of China.
| | | | | | | | | |
Collapse
|
43
|
Smith AG, Din A, Denyer M, Crowther NJ, Eagland D, Vowden K, Vowden P, Britland ST. Microengineered surface topography facilitates cell grafting from a prototype hydrogel wound dressing with antibacterial capability. Biotechnol Prog 2007; 22:1407-15. [PMID: 17022681 DOI: 10.1021/bp060192n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Skin wounds derive therapeutic benefit from redeployment of dermal tissues, whether as split-thickness allo- and autografts or as biological dressings comprising cultured cells. However, the clinical outcome is strongly influenced by the techniques used for cell/tissue grafting and also the microbiological status of the wound. Here we report that microtopography incorporated into the surface of a novel polymeric material, derivatized with fibronectin to promote attachment and encourage motility, improved the efficiency of cell transfer onto de-epithelialized human skin ex vivo. The microtopography had two functions, first as a conduit for migrating cells to cross between the vehicle and recipient surface and second to shield adherent cells from destruction by mechanical shearing during handling and application. Quantitative analysis showed that topographic projections (columns) rather than recesses (pits) in the hydrogel surface achieved the highest efficiency of cell transfer. In order to address the crucial relevance of microbiological contamination to the success of wound grafting, the effect of iodine on several common bacterial pathogens was examined using an XTT+C(Q10) kinetic cell viability assay. Increasing concentrations of iodine initially stressed and after 0.5% v/v were subsequently bacteriocidal for Gram-negative Pseudomonas aeruginosa and Escherichia coli and Gram-positive Bacillus subtillis and Staphylococcus aureus. Slightly higher doses of iodine (approx 1-1.5% v/v) were required to kill HaCaT cells outright, but for both pro- and eukaryotes the major determinant of cytotoxicity was absolute dose rather than duration of exposure. Iodine delivered by the hydrogel at low concentration was bacteriostatic but not apparently cytotoxic to epithelial cells as measured by MTT end-point cell viability assay. Zone of inhibition studies confirmed that bacteriocidal quantities of neomycin, phenol red, and silver could also be delivered using the same hydrogel. This research suggests that grafting cell-based biological dressings to wounds using a topographically modified hydrogel dressing capable of simultaneous reducing the microbiological threat to a successful outcome may be a realistic clinical proposition.
Collapse
Affiliation(s)
- Annie G Smith
- School of Pharmacy, University of Bradford, UK, AGT Sciences Ltd., Listerhills Science Park, Bradford, UK
| | | | | | | | | | | | | | | |
Collapse
|