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Comparison of healing of full-thickness skin wounds grafted with multidirectional or unidirectional autologous artificial dermis: differential delivery of healing biomarkers. Drug Deliv Transl Res 2018; 8:1014-1024. [DOI: 10.1007/s13346-018-0528-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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152
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Urie R, Ghosh D, Ridha I, Rege K. Inorganic Nanomaterials for Soft Tissue Repair and Regeneration. Annu Rev Biomed Eng 2018; 20:353-374. [PMID: 29621404 DOI: 10.1146/annurev-bioeng-071516-044457] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Inorganic nanomaterials have witnessed significant advances in areas of medicine including cancer therapy, imaging, and drug delivery, but their use in soft tissue repair and regeneration is in its infancy. Metallic, ceramic, and carbon allotrope nanoparticles have shown promise in facilitating tissue repair and regeneration. Inorganic nanomaterials have been employed to improve stem cell engraftment in cellular therapy, material mechanical stability in tissue repair, electrical conductivity in nerve and cardiac regeneration, adhesion strength in tissue approximation, and antibacterial capacity in wound dressings. These nanomaterials have also been used to improve or replace common surgical materials and restore functionality to damaged tissue. We provide a comprehensive overview of inorganic nanomaterials in tissue repair and regeneration, and discuss their promise and limitations for eventual translation to the clinic.
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Affiliation(s)
- Russell Urie
- Department of Chemical Engineering, Arizona State University, Tempe, Arizona 85287-6106, USA;
| | - Deepanjan Ghosh
- Department of Biological Design, Arizona State University, Tempe, Arizona 85287-6106, USA
| | - Inam Ridha
- Department of Biomedical Engineering, Arizona State University, Tempe, Arizona 85287-6106, USA
| | - Kaushal Rege
- Department of Chemical Engineering, Arizona State University, Tempe, Arizona 85287-6106, USA;
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153
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Instructive microenvironments in skin wound healing: Biomaterials as signal releasing platforms. Adv Drug Deliv Rev 2018; 129:95-117. [PMID: 29627369 DOI: 10.1016/j.addr.2018.03.012] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 03/16/2018] [Accepted: 03/27/2018] [Indexed: 12/16/2022]
Abstract
Skin wound healing aims to repair and restore tissue through a multistage process that involves different cells and signalling molecules that regulate the cellular response and the dynamic remodelling of the extracellular matrix. Nowadays, several therapies that combine biomolecule signals (growth factors and cytokines) and cells are being proposed. However, a lack of reliable evidence of their efficacy, together with associated issues such as high costs, a lack of standardization, no scalable processes, and storage and regulatory issues, are hampering their application. In situ tissue regeneration appears to be a feasible strategy that uses the body's own capacity for regeneration by mobilizing host endogenous stem cells or tissue-specific progenitor cells to the wound site to promote repair and regeneration. The aim is to engineer instructive systems to regulate the spatio-temporal delivery of proper signalling based on the biological mechanisms of the different events that occur in the host microenvironment. This review describes the current state of the different signal cues used in wound healing and skin regeneration, and their combination with biomaterial supports to create instructive microenvironments for wound healing.
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154
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Stricker-Krongrad AH, Alikhassy Z, Matsangos N, Sebastian R, Marti G, Lay F, Harmon J. Efficacy of Chitosan-Based Dressing for Control of Bleeding in Excisional Wounds. EPLASTY 2018; 18:e14. [PMID: 29619144 PMCID: PMC5863420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Introduction: Excessive bleeding is a complication of wound debridement in patients receiving anticoagulation treatment. Chitosan is a linear, positively charged polysaccharide that has potential as a hemostatic topical dressing. This study examined the hemostatic efficacy of the chitosan based Opticell dressing (Medline Industries, Chicago, Ill) in heparinized rats with excisional wounds mimicking debridement. Methods: Three paired 12-mm excisional wounds were created on the dorsum of 600-g Sprague-Dawley rats 2 hours after intraperitoneal injection of heparin 800 IU/kg. Opticell or gauze dressings were applied with 3 seconds of gentle pressure. Results:Total Bleeding: The dressings were left in place until cessation of bleeding. Ten minutes was enough time for complete bleeding cessation in both groups. Gauze and Opticell were weighed before and after bleeding cessation, with the difference representing blood loss. Total blood loss was 627 ± 47 mg/10 min with the standard gauze, but 247 ± 47 mg/10 min with Opticell (P = .002 Mann-Whitney). N = 6 wounds per group. Rate of Bleeding: Gauze and Opticell dressings were removed and instantly replaced with 3 seconds of gentle pressure every minute until bleeding cessation. The removed dressings were weighed before and after application. There was less bleeding in the Opticell group at minutes 1, 2, and 3. Gauze: 183 ± 40, 140 ± 30, and 109 ± 15 mg/min vs Opticell: 91 ± 17, 54 ± 8, and 57 ± 11 mg/min). Analysis of variance, Tukey's test, P < .05. N = 12 wounds per group. Conclusion: Topical application of Opticell dressing with chitosan has hemostatic effects that could be a useful tool to control bleeding associated with wound debridement.
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Affiliation(s)
- Anne-Heloise Stricker-Krongrad
- Section of Surgical Sciences, Department of Surgery, John Hopkins Bayview Medical Center, John Hopkins University School of Medicine, Baltimore, Md
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
| | - Zahra Alikhassy
- Section of Surgical Sciences, Department of Surgery, John Hopkins Bayview Medical Center, John Hopkins University School of Medicine, Baltimore, Md
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
| | - Nicolette Matsangos
- Section of Surgical Sciences, Department of Surgery, John Hopkins Bayview Medical Center, John Hopkins University School of Medicine, Baltimore, Md
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
| | - Raul Sebastian
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
| | - Guy Marti
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
- Department of Surgery Clinique Saint-Jean-l'Ermitage Hospital, Melun, France
| | - Frank Lay
- Section of Surgical Sciences, Department of Surgery, John Hopkins Bayview Medical Center, John Hopkins University School of Medicine, Baltimore, Md
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
| | - John W. Harmon
- Section of Surgical Sciences, Department of Surgery, John Hopkins Bayview Medical Center, John Hopkins University School of Medicine, Baltimore, Md
- Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Md
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155
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Affiliation(s)
- Julia Etulain
- Laboratory of Experimental Thrombosis, Institute of Experimental Medicine-CONICET, National Academy of Medicine, Buenos Aires, Argentina
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156
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An optimised protocol for platelet-rich plasma preparation to improve its angiogenic and regenerative properties. Sci Rep 2018; 8:1513. [PMID: 29367608 PMCID: PMC5784112 DOI: 10.1038/s41598-018-19419-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 01/02/2018] [Indexed: 01/13/2023] Open
Abstract
Although platelet-rich plasma (PRP) is used as a source of growth factors in regenerative medicine, its effectiveness remains controversial, partially due to the absence of PRP preparation protocols based on the regenerative role of platelets. Here, we aimed to optimise the protocol by analysing PRP angiogenic and regenerative properties. Three optimising strategies were evaluated: dilution, 4 °C pre-incubation, and plasma cryoprecipitate supplementation. Following coagulation, PRP releasates (PRPr) were used to induce angiogenesis in vitro (HMEC-1 proliferation, migration, and tubule formation) and in vivo (chorioallantoic membrane), as well as regeneration of excisional wounds on mouse skin. Washed platelet releasates induced greater angiogenesis than PRPr due to the anti-angiogenic effect of plasma, which was decreased by diluting PRPr with saline. Angiogenesis was also improved by both PRP pre-incubation at 4 °C and cryoprecipitate supplementation. A combination of optimising variables exerted an additive effect, thereby increasing the angiogenic activity of PRPr from healthy donors and diabetic patients. Optimised PRPr induced faster and more efficient mouse skin wound repair compared to that induced by non-optimised PRPr. Acetylsalicylic acid inhibited angiogenesis and tissue regeneration mediated by PRPr; this inhibition was reversed following optimisation. Our findings indicate that PRP pre-incubation at 4 °C, PRPr dilution, and cryoprecipitate supplementation improve the angiogenic and regenerative properties of PRP compared to the obtained by current methods.
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157
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Watt SM, Pleat JM. Stem cells, niches and scaffolds: Applications to burns and wound care. Adv Drug Deliv Rev 2018; 123:82-106. [PMID: 29106911 DOI: 10.1016/j.addr.2017.10.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 10/19/2017] [Accepted: 10/22/2017] [Indexed: 12/11/2022]
Abstract
The importance of skin to survival, and the devastating physical and psychological consequences of scarring following reparative healing of extensive or difficult to heal human wounds, cannot be disputed. We discuss the significant challenges faced by patients and healthcare providers alike in treating these wounds. New state of the art technologies have provided remarkable insights into the role of skin stem and progenitor cells and their niches in maintaining skin homeostasis and in reparative wound healing. Based on this knowledge, we examine different approaches to repair extensive burn injury and chronic wounds, including full and split thickness skin grafts, temporising matrices and scaffolds, and composite cultured skin products. Notable developments include next generation skin substitutes to replace split thickness skin autografts and next generation gene editing coupled with cell therapies to treat genodermatoses. Further refinements are predicted with the advent of bioprinting technologies, and newly defined biomaterials and autologous cell sources that can be engineered to more accurately replicate human skin architecture, function and cosmesis. These advances will undoubtedly improve quality of life for patients with extensive burns and difficult to heal wounds.
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Affiliation(s)
- Suzanne M Watt
- Stem Cell Research, Nuffield Division of Clinical Laboratory Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9BQ, UK.
| | - Jonathan M Pleat
- Department of Plastic and Reconstructive Surgery, North Bristol NHS Trust and University of Bristol, Westbury on Trym, Bristol BS9 3TZ, UK.
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158
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Goodarzi P, Alavi-Moghadam S, Sarvari M, Tayanloo Beik A, Falahzadeh K, Aghayan H, Payab M, Larijani B, Gilany K, Rahim F, Adibi H, Arjmand B. Adipose Tissue-Derived Stromal Cells for Wound Healing. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1119:133-149. [PMID: 29858972 DOI: 10.1007/5584_2018_220] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Skin as the outer layer covers the body. Wounds can affect this vital organ negatively and disrupt its functions. Wound healing as a biological process is initiated immediately after an injury. This process consists of three stages: inflammation, proliferation, remodeling. Generally, these three stages occur continuously and timely. However, some factors such as infection, obesity and diabetes mellitus can interfere with these stages and impede the normal healing process which results in chronic wounds. Financial burden on both patients and health care systems, negative biologic effect on the patient's general health status and reduction in quality of life are a number of issues which make chronic wounds as a considerable challenge. During recent years, along with advances in the biomedical sciences, various surgical and non-surgical therapeutic methods have been suggested. All of these suggested treatments have their own advantages and disadvantages. Recently, cell-based therapies and regenerative medicine represent promising approaches to wound healing. Accordingly, several types of mesenchymal stem cells have been used in both preclinical and clinical settings for the treatment of wounds. Adipose-derived stromal cells are a cost-effective source of mesenchymal stem cells in wound management which can be easily harvest from adipose tissues through the less invasive processes with high yield rates. In addition, their ability to secrete multiple cytokines and growth factors, and differentiation into skin cells make them an ideal cell type to use in wound treatment. This is a concise overview on the application of adipose-derived stromal cells in wound healing and their role in the treatment of chronic wounds.
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Affiliation(s)
- Parisa Goodarzi
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sepideh Alavi-Moghadam
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Sarvari
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Akram Tayanloo Beik
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Khadijeh Falahzadeh
- Metabolomics and Genomics Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamidreza Aghayan
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Moloud Payab
- Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kambiz Gilany
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Fakher Rahim
- Health Research Institute, Thalassemia and Hemoglobinopathy Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hossein Adibi
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Babak Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. .,Metabolomics and Genomics Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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159
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Wei JCJ, Edwards GA, Martin DJ, Huang H, Crichton ML, Kendall MAF. Allometric scaling of skin thickness, elasticity, viscoelasticity to mass for micro-medical device translation: from mice, rats, rabbits, pigs to humans. Sci Rep 2017; 7:15885. [PMID: 29162871 PMCID: PMC5698453 DOI: 10.1038/s41598-017-15830-7] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 11/02/2017] [Indexed: 12/23/2022] Open
Abstract
Emerging micro-scale medical devices are showing promise, whether in delivering drugs or extracting diagnostic biomarkers from skin. In progressing these devices through animal models towards clinical products, understanding the mechanical properties and skin tissue structure with which they interact will be important. Here, through measurement and analytical modelling, we advanced knowledge of these properties for commonly used laboratory animals and humans (~30 g to ~150 kg). We hypothesised that skin's stiffness is a function of the thickness of its layers through allometric scaling, which could be estimated from knowing a species' body mass. Results suggest that skin layer thicknesses are proportional to body mass with similar composition ratios, inter- and intra-species. Experimental trends showed elastic moduli increased with body mass, except for human skin. To interpret the relationship between species, we developed a simple analytical model for the bulk elastic moduli of skin, which correlated well with experimental data. Our model suggest that layer thicknesses may be a key driver of structural stiffness, as the skin layer constituents are physically and therefore mechanically similar between species. Our findings help advance the knowledge of mammalian skin mechanical properties, providing a route towards streamlined micro-device research and development onto clinical use.
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Affiliation(s)
- Jonathan C J Wei
- Delivery of Drugs and Genes Group (D2G2), Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia QLD, 4072, Australia
| | - Grant A Edwards
- Martin group, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia QLD, 4072, Australia
| | - Darren J Martin
- Martin group, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia QLD, 4072, Australia
| | - Han Huang
- Nanomechanics and Nanomanufacturing Group, School of Mechanical and Mining Engineering, Faculty of Engineering, Architecture and Information Technology, The University of Queensland, St Lucia QLD, 4072, Australia
| | - Michael L Crichton
- Delivery of Drugs and Genes Group (D2G2), Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia QLD, 4072, Australia.
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdom.
| | - Mark A F Kendall
- Delivery of Drugs and Genes Group (D2G2), Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia QLD, 4072, Australia.
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia QLD, 4072, Australia.
- Faculty of Medicine, The University of Queensland, Royal Brisbane and Women's Hospital, Herston QLD, 4006, Australia.
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160
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Hołyńska-Iwan I, Dziembowska I, Smyk P, Lampka M, Olszewska-Słonina D. Capsaicin Used on Skin Influences Ion Transport Pathways: An in vitro Study. Skin Pharmacol Physiol 2017; 31:19-27. [PMID: 29131139 DOI: 10.1159/000481689] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 09/15/2017] [Indexed: 01/07/2023]
Abstract
Acute, adverse skin effects to capsaicin can be activated by inhibition of sodium transport not only in nociceptive neurons, but also in keratinocytes. The aim of the current study was to describe and compare immediate (15 s) and prolonged (30 min) effects of capsaicin on epidermal (not neural) sodium transport using a rabbit skin model. Skin fragments (n = 169) were incubated in 4 conditions: undisturbed ion transport (U; n = 48); inhibited sodium transport (INa; n = 34) with amiloride used as sodium transport blocker; long-term irritation by capsaicin with undisturbed ion transport (CAPSA-U; n = 43) and with inhibited sodium transport (CAPSA-INa; n = 35). After 30 min of incubation, a solution of capsaicin was applied directly to the skin fragments. The study demonstrated that sodium transport inhibition eliminated the effects of both immediate and prolonged capsaicin application. The results could be the basis for future research considering selective sodium transport inhibitors for human skin to reduce the side effects of capsaicin, related to activation of sodium channels in keratinocytes.
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Affiliation(s)
- Iga Hołyńska-Iwan
- Department of Pathobiochemistry and Clinical Chemistry, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz Nicolaus Copernicus University in Torun, Bydgoszcz, Poland
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161
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Fisher G, Rittié L. Restoration of the basement membrane after wounding: a hallmark of young human skin altered with aging. J Cell Commun Signal 2017; 12:401-411. [PMID: 29086203 DOI: 10.1007/s12079-017-0417-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 10/11/2017] [Indexed: 11/30/2022] Open
Abstract
In skin, the basement membrane at the dermal-epidermal junction (DEJ-BM) is an important structure that tightly binds the epidermis to the dermis, and acts as a permeability barrier that controls exchange of macromolecules. Repair of the DEJ-BM during wound healing is important for restoration of skin functional properties after wounding. Here, we used a CO2 laser to perform partial thickness wounds in human volunteers, and directly compared wound repair in healthy young and aged individuals, focusing on the DEJ-BM. Our results show that the DEJ-BM is restored within four weeks after partial thickness wounds in young adults. We identified laminin-γ2 as preferred substrate for keratinocytes during reepithelialization of partial thickness human wounds. Laminin-γ2 is expressed continuously by migrating keratinocytes during reepithelialization, whereas collagen IV and collagen VII are deposited after wound closure. In contrast, our study shows that the DEJ-BM restoration following wounding is deficient in elderly individuals. Specifically, COL7A2 was barely increased during wound repair in aged skin and, as a result, the DEJ-BM in elderly skin was not restored and showed abnormal structure. Our data suggest that ameliorating the quality of the DEJ-BM restoration is a promising therapeutic approach to improve the quality of repaired skin in the elderly.
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Affiliation(s)
- Gary Fisher
- Department of Dermatology, Medical School, University of Michigan, Ann Arbor, MI, USA
| | - Laure Rittié
- Department of Dermatology, Medical School, University of Michigan, Ann Arbor, MI, USA. .,Dermatology Unit, R&D Immuno-Inflammation Therapeutic Area, GlaxoSmithKline, 1250 Collegeville Rd, UP1410, Collegeville, PA, 19426, USA.
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162
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Mias C, Filiol J, Josse G. Optical coherence tomography: An efficient imaging method for the visualization of human epidermis orientation. Skin Res Technol 2017; 24:340-342. [PMID: 29057514 DOI: 10.1111/srt.12414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2017] [Indexed: 11/29/2022]
Abstract
Recently, it has been shown that epidermal sheets taken from suction blisters are very appropriate skin samples for Multi-Photon (MP) microscopy. However, we observed that image quality was much better when the sample was visualized through the basale side. Thus, the epidermis orientation needs to be controlled before MP imaging. We observed that the use of standard laboratory binoculars led to a high rate of false results. In this context, we showed that optical coherence tomography provided clear images of the epidermis orientation without loss of sample integrity and thus represents an effective technique before slide sealing and MP analysis.
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Affiliation(s)
- C Mias
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - J Filiol
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - G Josse
- Skin Research Center, Pierre Fabre Dermo-Cosmétique, Toulouse, France
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163
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Shefa AA, Amirian J, Kang HJ, Bae SH, Jung HI, Choi HJ, Lee SY, Lee BT. In vitro and in vivo evaluation of effectiveness of a novel TEMPO-oxidized cellulose nanofiber-silk fibroin scaffold in wound healing. Carbohydr Polym 2017; 177:284-296. [PMID: 28962770 DOI: 10.1016/j.carbpol.2017.08.130] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 08/24/2017] [Accepted: 08/25/2017] [Indexed: 12/19/2022]
Abstract
In this study, a novel TEMPO-oxidized cellulose nanofiber (TOCN)-silk fibroin scaffold was prepared using a cost effective freeze drying method. Fundamental physical characterizations were carried out by scanning electron microscopy (SEM), pore diameter determination, FT-IR. PBS uptake behavior of the scaffold showed that, silk fibroin can enhance the swelling capacity of TOCN. L929 primary fibroblast cell was selected for in vitro studies, which showed that the scaffolds facilitated growth of cells. In vivo evaluation of TOCN, TOCN-silk fibroin composites was examined using critical sized rat skin excisional model for one and two weeks. The results of rat wound model revealed that, compared to only TOCN scaffold, TOCN-silk fibroin scaffold successfully promoted wound healing by the expression of wound healing markers. TOCN-silk fibroin 2% has the fastest wound healing capacity. Thus, it appears that TOCN-silk fibroin composite scaffolds can be useful as wound healing material in clinical applications.
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Affiliation(s)
- Anha Afrin Shefa
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Jhaleh Amirian
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hoe Jin Kang
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Sang Ho Bae
- Department of Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hae-Il Jung
- Department of Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hwan-Jun Choi
- Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Sun Young Lee
- Division of Environmental Material Engineering, Department of Forest Products, Korea Forest Research Institute, Republic of Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea; Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea.
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164
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Castro Souza Junior Neto JD, Estevão LRDM, Baratella-Evêncio L, Vieira MGF, Simões RS, Florencio-Silva R, Evêncio-Luz L, Evêncio-Neto J. Mast cell concentration and skin wound contraction in rats treated with Ximenia americana L. Acta Cir Bras 2017; 32:148-156. [PMID: 28300877 DOI: 10.1590/s0102-865020170207] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 01/24/2017] [Indexed: 01/13/2023] Open
Abstract
PURPOSE To evaluate wound contraction and the concentration of mast cells in skin wounds treated with wild plum (Ximenia americana) essential oil-based ointment in rats. METHODS Sixty rats were submitted to two cutaneous wounds in the thoracic region, on the right and left antimeres. Thereon, they were divided into three groups: GX (wounds treated once a day with hydro alcoholic branch extract of Ximenia americana), GP (wounds that received vehicle), and GC (wounds without product application). Wounds were measured immediately after the injury as well as 4, 7, 14 and 21 days post-topical application of the extract. At these days, five rats from each group were euthanatized. Thereafter, samples were fixed in 10% formaldehyde and processed for paraffin embedding. Sections were stained with H.E, Masson's Trichrome and toluidine blue for morphological, morphometrical and histopathological analysis, under light microscopy. The degree of epithelial contraction was measured and mast cell concentrations were also evaluated with an image analyzer (Image Pro-plus®software) . RESULTS The extract treated group showed lower mast cell concentrations in the 4th day of lesion, as compared to GP (GX<GP=GC, p=0.029), as well as with increased contraction at 7th and 14th days, respectively (7th and 14th days, GX > GP = GC; p<0.05) . CONCLUSION Ointment containing 10% X. americana induces a decrease in mast cell concentration, at the beginning of the healing process, and promotes early skin wound contraction in rats.
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Affiliation(s)
- José de Castro Souza Junior Neto
- Postgraduate Program in Animal Bioscience, Department of Morphology and Animal Physiology, Universidade Federal do Rio Grande do Norte, Recife, PE, Brazil
| | - Lígia Reis de Moura Estevão
- Postgraduate Program in Animal Bioscience, Department of Morphology and Animal Physiology, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
| | | | | | | | | | - Luís Evêncio-Luz
- Microbiology Division, Department of Biology, Universidade Federal do Piauí, Picos, PI, Brazil
| | - Joaquim Evêncio-Neto
- Anatomy Division, Department of Morphology and Physiology, UFRPE, Recife, PE, Brazil
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165
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St Laurent G, Seilheimer B, Tackett M, Zhou J, Shtokalo D, Vyatkin Y, Ri M, Toma I, Jones D, McCaffrey TA. Deep Sequencing Transcriptome Analysis of Murine Wound Healing: Effects of a Multicomponent, Multitarget Natural Product Therapy-Tr14. Front Mol Biosci 2017; 4:57. [PMID: 28879183 PMCID: PMC5572416 DOI: 10.3389/fmolb.2017.00057] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 08/02/2017] [Indexed: 02/06/2023] Open
Abstract
Wound healing involves an orchestrated response that engages multiple processes, such as hemostasis, cellular migration, extracellular matrix synthesis, and in particular, inflammation. Using a murine model of cutaneous wound repair, the transcriptome was mapped from 12 h to 8 days post-injury, and in response to a multicomponent, multi-target natural product, Tr14. Using single-molecule RNA sequencing (RNA-seq), there were clear temporal changes in known transcripts related to wound healing pathways, and additional novel transcripts of both coding and non-coding genes. Tr14 treatment modulated >100 transcripts related to key wound repair pathways, such as response to wounding, wound contraction, and cytokine response. The results provide the most precise and comprehensive characterization to date of the transcriptome's response to skin damage, repair, and multicomponent natural product therapy. By understanding the wound repair process, and the effects of natural products, it should be possible to intervene more effectively in diseases involving aberrant repair.
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Affiliation(s)
- Georges St Laurent
- St. Laurent InstituteVancouver, WA, United States.,SeqLL, Inc.Woburn, MA, United States
| | | | | | - Jianhua Zhou
- St. Laurent InstituteVancouver, WA, United States.,Nantong UniversityNantong, China
| | - Dmitry Shtokalo
- St. Laurent InstituteVancouver, WA, United States.,A.P.Ershov Institute of Informatics SystemsNovosibirsk, Russia.,AcademGene LLCNovosibirsk, Russia
| | - Yuri Vyatkin
- St. Laurent InstituteVancouver, WA, United States.,AcademGene LLCNovosibirsk, Russia
| | - Maxim Ri
- St. Laurent InstituteVancouver, WA, United States.,AcademGene LLCNovosibirsk, Russia
| | - Ian Toma
- Nantong UniversityNantong, China
| | - Dan Jones
- Biologische Heilmittel Heel GmbHBaden-Baden, Germany
| | - Timothy A McCaffrey
- Division of Genomic Medicine, The George Washington UniversityWashington, DC, United States
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166
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Sivasubramanian S, Chandrasekar G, Svensson Akusjärvi S, Thangam R, Sathuvan M, Kumar RBS, Hussein H, Vincent S, Madhan B, Gunasekaran P, Kitambi SS. Phenotypic Screening Identifies Synergistically Acting Natural Product Enhancing the Performance of Biomaterial Based Wound Healing. Front Pharmacol 2017; 8:433. [PMID: 28769790 PMCID: PMC5513901 DOI: 10.3389/fphar.2017.00433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/16/2017] [Indexed: 11/13/2022] Open
Abstract
The potential of multifunctional wound heal biomaterial relies on the optimal content of therapeutic constituents as well as the desirable physical, chemical, and biological properties to accelerate the healing process. Formulating biomaterials such as amnion or collagen based scaffolds with natural products offer an affordable strategy to develop dressing material with high efficiency in healing wounds. Using image based phenotyping and quantification, we screened natural product derived bioactive compounds for modulators of types I and III collagen production from human foreskin derived fibroblast cells. The identified hit was then formulated with amnion to develop a biomaterial, and its biophysical properties, in vitro and in vivo effects were characterized. In addition, we performed functional profiling analyses by PCR array to understand the effect of individual components of these materials on various genes such as inflammatory mediators including chemokines and cytokines, growth factors, fibroblast stimulating markers for collagen secretion, matrix metalloproteinases, etc., associated with wound healing. FACS based cell cycle analyses were carried out to evaluate the potential of biomaterials for induction of proliferation of fibroblasts. Western blot analyses was done to examine the effect of biomaterial on collagen synthesis by cells and compared to cells grown in the presence of growth factors. This work demonstrated an uncomplicated way of identifying components that synergistically promote healing. Besides, we demonstrated that modulating local wound environment using biomaterials with bioactive compounds could enhance healing. This study finds that the developed biomaterials offer immense scope for healing wounds by means of their skin regenerative features such as anti-inflammatory, fibroblast stimulation for collagen secretion as well as inhibition of enzymes and markers impeding the healing, hydrodynamic properties complemented with other features including non-toxicity, biocompatibility, and safety.
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Affiliation(s)
| | - Gayathri Chandrasekar
- Department of Microbiology, Tumor and Cell Biology, Karolinska InstitutetSolna, Sweden
| | | | - Ramar Thangam
- Department of Virology, King Institute of Preventive Medicine and ResearchChennai, India
- Council of Scientific and Industrial Research – Central Leather Research InstituteChennai, India
| | - Malairaj Sathuvan
- Department of Virology, King Institute of Preventive Medicine and ResearchChennai, India
| | - R. B. S. Kumar
- Department of Virology, King Institute of Preventive Medicine and ResearchChennai, India
| | - Hawraa Hussein
- Department of Microbiology, Tumor and Cell Biology, Karolinska InstitutetSolna, Sweden
| | - Savariar Vincent
- Center for Environmental Research and Development, Loyola Institute of Frontier Energy, Loyola CollegeChennai, India
| | - Balaraman Madhan
- Council of Scientific and Industrial Research – Central Leather Research InstituteChennai, India
| | - Palani Gunasekaran
- Department of Virology, King Institute of Preventive Medicine and ResearchChennai, India
| | - Satish S. Kitambi
- Department of Microbiology, Tumor and Cell Biology, Karolinska InstitutetSolna, Sweden
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167
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Oda Y, Hu L, Nguyen T, Fong C, Tu CL, Bikle DD. Combined Deletion of the Vitamin D Receptor and Calcium-Sensing Receptor Delays Wound Re-epithelialization. Endocrinology 2017; 158:1929-1938. [PMID: 28368538 PMCID: PMC5460927 DOI: 10.1210/en.2017-00061] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 03/08/2017] [Indexed: 12/28/2022]
Abstract
When the skin is injured, keratinocytes proliferate, migrate, and differentiate to regenerate the epidermis. We recently showed that ablation of the vitamin D receptor (Vdr) in keratinocytes delays wound re-epithelialization in mice also fed a low-calcium diet, implicating a cooperative role of Vdr and calcium signaling in this process. In this study, we examined the role of vitamin D and calcium signaling in wound healing by deleting their receptors, Vdr and the calcium-sensing receptor (Casr). Gene expression profiling of neonatal epidermis lacking both Vdr and Casr [Vdr and Casr double knockout (DKO)] specifically in keratinocytes revealed that DKO affects a number of pathways relevant to wound healing, including Vdr, β-catenin, and adherens junction (AJ) signaling. In adult skin, DKO caused a significant delay in wound closure and re-epithelialization, whereas myofibroblast numbers and matrix deposition were unaffected. The injury-induced proliferation of epidermal keratinocytes was blunted in both epidermis and hair follicles, and expression of β-catenin target genes was reduced in the DKO. Expression of E-cadherin and desmoglein 1 was reduced in the shortened leading edges of the epithelial tongues re-epithelializing the wounds, consistent with the decreased migration rate of DKO keratinocytes in vitro. These results demonstrate that Vdr and Casr are required for β-catenin-regulated cell proliferation and AJ formation essential for re-epithelialization after wounding. We conclude that vitamin D and calcium signaling in keratinocytes are required for a normal regenerative response of the skin to wounding.
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Affiliation(s)
- Yuko Oda
- Department of Medicine, University of California San Francisco, San Francisco, California 94158
- Department of Dermatology, University of California San Francisco, San Francisco, California 94158
| | - Lizhi Hu
- Department of Medicine, University of California San Francisco, San Francisco, California 94158
- School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Thai Nguyen
- San Francisco Veterans Affairs Medical Center, San Francisco, California 94158
| | - Chak Fong
- San Francisco Veterans Affairs Medical Center, San Francisco, California 94158
| | - Chia-ling Tu
- San Francisco Veterans Affairs Medical Center, San Francisco, California 94158
| | - Daniel D. Bikle
- San Francisco Veterans Affairs Medical Center, San Francisco, California 94158
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168
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Abstract
Hypertrophic scar (HTS) is a common outcome of deep dermal wound healing mainly followed mechanical, chemical, and thermal injuries in the skin. Because of the lack of the most effective prevention and treatment, it is particularly important to establish an ideal dermal animal model for improving the understanding of the pathogenesis and exploring therapeutic approaches of HTS. Compared to other dermal fibrotic animal models in rabbits, red Duroc pigs, guinea pigs, rats, and mice, the approach that uses normal human split-thickness skin grafted onto nude or other immunodeficient mice which develop scars that resemble human HTS offers the advantages of lower cost, easier manipulation, and shorter research period. In this chapter, we will introduce the detailed procedures to create the ideal dermal fibrotic mouse model.
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169
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Sorg H, Tilkorn DJ, Hager S, Hauser J, Mirastschijski U. Skin Wound Healing: An Update on the Current Knowledge and Concepts. Eur Surg Res 2016; 58:81-94. [PMID: 27974711 DOI: 10.1159/000454919] [Citation(s) in RCA: 615] [Impact Index Per Article: 76.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 12/05/2016] [Indexed: 11/19/2022]
Abstract
BACKGROUND The integrity of healthy skin plays a crucial role in maintaining physiological homeostasis of the human body. The skin is the largest organ system of the body. As such, it plays pivotal roles in the protection against mechanical forces and infections, fluid imbalance, and thermal dysregulation. At the same time, it allows for flexibility to enable joint function in some areas of the body and more rigid fixation to hinder shifting of the palm or foot sole. Many instances lead to inadequate wound healing which necessitates medical intervention. Chronic conditions such as diabetes mellitus or peripheral vascular disease can lead to impaired wound healing. Acute trauma such as degloving or large-scale thermal injuries are followed by a loss of skin organ function rendering the organism vulnerable to infections, thermal dysregulation, and fluid loss. METHODS For this update article, we have reviewed the actual literature on skin wound healing purposes focusing on the main phases of wound healing, i.e., inflammation, proliferation, epithelialization, angiogenesis, remodeling, and scarring. RESULTS The reader will get briefed on new insights and up-to-date concepts in skin wound healing. The macrophage as a key player in the inflammatory phase will be highlighted. During the epithelialization process, we will present the different concepts of how the wound will get closed, e.g., leapfrogging, lamellipodial crawling, shuffling, and the stem cell niche. The neovascularization represents an essential component in wound healing due to its fundamental impact from the very beginning after skin injury until the end of the wound remodeling. Here, the distinct pattern of the neovascularization process and the special new functions of the pericyte will be underscored. At the end, this update will present 3 topics of high interest in skin wound healing issues, dealing with scarring, tissue engineering, and plasma application. CONCLUSION Although wound healing mechanisms and specific cell functions in wound repair have been delineated in part, many underlying pathophysiological processes are still unknown. The purpose of the following update on skin wound healing is to focus on the different phases and to brief the reader on the current knowledge and new insights. Skin wound healing is a complex process, which is dependent on many cell types and mediators interacting in a highly sophisticated temporal sequence. Although some interactions during the healing process are crucial, redundancy is high and other cells or mediators can adopt functions or signaling without major complications.
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Affiliation(s)
- Heiko Sorg
- Department of Plastic, Reconstructive and Aesthetic Surgery, Hand Surgery, Alfried Krupp Krankenhaus Essen, Essen, Germany
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170
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Später T, Frueh FS, Metzger W, Menger MD, Laschke MW. In vivo
biocompatibility, vascularization, and incorporation of Integra®
dermal regenerative template and flowable wound matrix. J Biomed Mater Res B Appl Biomater 2016; 106:52-60. [DOI: 10.1002/jbm.b.33813] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 10/05/2016] [Accepted: 10/27/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Thomas Später
- Institute for Clinical & Experimental Surgery, Saarland University; 66421 Homburg/Saar Germany
| | - Florian S. Frueh
- Institute for Clinical & Experimental Surgery, Saarland University; 66421 Homburg/Saar Germany
- Division of Plastic Surgery and Hand Surgery; University Hospital Zurich; 8091 Zurich Switzerland
| | - Wolfgang Metzger
- Department of Trauma, Hand and Reconstructive Surgery; Saarland University; 66421 Homburg/Saar Germany
| | - Michael D. Menger
- Institute for Clinical & Experimental Surgery, Saarland University; 66421 Homburg/Saar Germany
| | - Matthias W. Laschke
- Institute for Clinical & Experimental Surgery, Saarland University; 66421 Homburg/Saar Germany
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171
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Lipoxin A 4 Counter-regulates Histamine-stimulated Glycoconjugate Secretion in Conjunctival Goblet Cells. Sci Rep 2016; 6:36124. [PMID: 27824117 PMCID: PMC5099697 DOI: 10.1038/srep36124] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 10/11/2016] [Indexed: 12/11/2022] Open
Abstract
Conjunctival goblet cells synthesize and secrete mucins which play an important role in protecting the ocular surface. Pro-resolution mediators, such as lipoxin A4 (LXA4), are produced during inflammation returning the tissue to homeostasis and are also produced in non-inflamed tissues. The purpose of this study was to determine the actions of LXA4 on cultured human conjunctival goblet cell mucin secretion and increase in intracellular [Ca2+] ([Ca2+]i) and on histamine-stimulated responses. LXA4 increased mucin secretion and [Ca2+]i, and activated ERK1/2 in human goblet cells. Addition of LXA4 before resolvin D1 (RvD1) decreased RvD1 responses though RvD1 did not block LXA4 responses. LXA4 inhibited histamine-stimulated increases in mucin secretion, [Ca2+]i, and ERK1/2 activation through activation of β-adrenergic receptor kinase 1. We conclude that conjunctival goblet cells respond to LXA4 through the ALX/FPR2 receptor to maintain homeostasis of the ocular surface and regulate histamine responses and could provide a new therapeutic approach for allergic conjunctivitis and dry eye diseases.
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172
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Michael S, Achilleos C, Panayiotou T, Strati K. Inflammation Shapes Stem Cells and Stemness during Infection and Beyond. Front Cell Dev Biol 2016; 4:118. [PMID: 27853732 PMCID: PMC5089974 DOI: 10.3389/fcell.2016.00118] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/14/2016] [Indexed: 12/21/2022] Open
Abstract
The outcome of an inflammatory incident can hang in the balance between restoring health and tissue integrity on the one hand, and promoting aberrant tissue homeostasis and adverse outcomes on the other. Both microbial-related and sterile inflammation is a complex response characterized by a range of innate immune cell types, which produce and respond to cytokine mediators and other inflammatory signals. In turn, cells native to the tissue in question can sense these mediators and respond by migrating, proliferating and regenerating the tissue. In this review we will discuss how the specific outcomes of inflammatory incidents are affected by the direct regulation of stem cells and cellular plasticity. While less well appreciated than the effects of inflammatory signals on immune cells and other differentiated cells, the effects are crucial in understanding inflammation and appropriately managing therapeutic interventions.
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Affiliation(s)
- Stella Michael
- Department of Biological Sciences, University of Cyprus Nicosia, Cyprus
| | - Charis Achilleos
- Department of Biological Sciences, University of Cyprus Nicosia, Cyprus
| | | | - Katerina Strati
- Department of Biological Sciences, University of Cyprus Nicosia, Cyprus
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173
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Amundsen T, Sørhaug S, Leira HO, Tyvold SS, Langø T, Hammer T, Manstad-Hulaas F, Mattsson E. A new removable airway stent. Eur Clin Respir J 2016; 3:30010. [PMID: 27608269 PMCID: PMC5015637 DOI: 10.3402/ecrj.v3.30010] [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: 10/12/2015] [Accepted: 08/02/2016] [Indexed: 11/20/2022] Open
Abstract
Background Malignant airway obstruction is a feared complication and will most probably occur more frequently in the future because of increasing cancer incidence and increased life expectancy in cancer patients. Minimal invasive treatment using airway stents represents a meaningful and life-saving palliation. We present a new removable airway stent for improved individualised treatment. Methods To our knowledge, the new airway stent is the world's first knitted and uncovered self-expanding metal stent, which can unravel and be completely removed. In an in vivo model using two anaesthetised and spontaneously breathing pigs, we deployed and subsequently removed the stents by unravelling the device. The procedures were executed by flexible bronchoscopy in an acute and a chronic setting – a ‘proof-of-principle’ study. Results The new stent was easily and accurately deployed in the central airways, and it remained fixed in its original position. It was easy to unravel and completely remove from the airways without clinically significant complications. During the presence of the stent in the chronic study, granulation tissue was induced. This tissue disappeared spontaneously with the removal. Conclusions The new removable stent functioned according to its purpose and unravelled easily, and it was completely removed without significant technical or medical complications. Induced granulation tissue disappeared spontaneously. Further studies on animals and humans are needed to define its optimal indications and future use.
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Affiliation(s)
- Tore Amundsen
- Department of Thoracic Medicine, St. Olavs Hospital, Trondheim, Norway.,Faculty of Medicine, Institute of Circulation and Medical Imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway;
| | - Sveinung Sørhaug
- Department of Thoracic Medicine, St. Olavs Hospital, Trondheim, Norway.,Faculty of Medicine, Institute of Circulation and Medical Imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway
| | - Håkon Olav Leira
- Department of Thoracic Medicine, St. Olavs Hospital, Trondheim, Norway.,Faculty of Medicine, Institute of Circulation and Medical Imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway
| | | | - Thomas Langø
- Department of Medical Technology, SINTEF, Trondheim, Norway.,Norwegian National Advisory Unit for Ultrasound and image-guided therapy, St Olavs Hospital, Trondheim, Norway
| | - Tommy Hammer
- Department of Radiology, St, Olavs Hospital, Trondheim, Norway
| | - Frode Manstad-Hulaas
- Faculty of Medicine, Institute of Circulation and Medical Imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway.,Department of Radiology, St, Olavs Hospital, Trondheim, Norway
| | - Erney Mattsson
- Faculty of Medicine, Institute of Circulation and Medical Imaging, Norwegian University of Technology and Science (NTNU), Trondheim, Norway.,Department of Vascular Surgery, St. Olavs Hospital, Trondheim, Norway
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174
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Mellott AJ, Zamierowski DS, Andrews BT. Negative Pressure Wound Therapy in Maxillofacial Applications. Dent J (Basel) 2016; 4:dj4030030. [PMID: 29563472 PMCID: PMC5806940 DOI: 10.3390/dj4030030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/10/2016] [Accepted: 08/30/2016] [Indexed: 12/15/2022] Open
Abstract
Negative pressure wound therapy has greatly advanced the field of wound healing for nearly two decades, by providing a robust surgical adjunct technique for accelerating wound closure in acute and chronic wounds. However, the application of negative pressure wound therapy in maxillofacial applications has been relatively under utilized as a result of the physical articulations and contours of the head and neck that make it challenging to obtain an airtight seal for different negative pressure wound therapy systems. Adapting negative pressure wound therapies for maxillofacial applications could yield significant enhancement of wound closure in maxillofacial applications. The current review summarizes the basic science underlying negative pressure wound therapy, as well as specific maxillofacial procedures that could benefit from negative pressure wound therapy.
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Affiliation(s)
- Adam J Mellott
- Department of Plastic Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - David S Zamierowski
- Department of Plastic Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Brian T Andrews
- Department of Plastic Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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