1
|
Sun Y, Ferreira F, Reid B, Zhu K, Ma L, Young BM, Hagan CE, Tsolis RM, Mogilner A, Zhao M. Gut epithelial electrical cues drive differential localization of enterobacteria. Nat Microbiol 2024:10.1038/s41564-024-01778-8. [PMID: 39164392 DOI: 10.1038/s41564-024-01778-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 07/09/2024] [Indexed: 08/22/2024]
Abstract
Salmonella translocate to the gut epithelium via microfold cells lining the follicle-associated epithelium (FAE). How Salmonella localize to the FAE is not well characterized. Here we use live imaging and competitive assays between wild-type and chemotaxis-deficient mutants to show that Salmonella enterica serotype Typhimurium (S. Typhimurium) localize to the FAE independently of chemotaxis in an ex vivo mouse caecum infection model. Electrical recordings revealed polarized FAE with sustained outward current and small transepithelial potential, while the surrounding villus is depolarized with inward current and large transepithelial potential. The distinct electrical potentials attracted S. Typhimurium to the FAE while Escherichia coli (E. coli) localized to the villi, through a process called galvanotaxis. Chloride flux involving the cystic fibrosis transmembrane conductance regulator (CFTR) generated the ionic currents around the FAE. Pharmacological inhibition of CFTR decreased S. Typhimurium FAE localization but increased E. coli recruitment. Altogether, our findings demonstrate that bioelectric cues contribute to S. Typhimurium targeting of specific gut epithelial locations, with potential implications for other enteric bacterial infections.
Collapse
Affiliation(s)
- Yaohui Sun
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA.
- Department of Internal Medicine, School of Medicine, University of California, Davis, Sacramento, CA, USA.
| | - Fernando Ferreira
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA
- Departamento de Biologia, Centro de Biologia Molecular e Ambiental (CBMA), Universidade do Minho, Braga, Portugal
| | - Brian Reid
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Kan Zhu
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Li Ma
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA
- Coty R&D Technology and Innovation, Shanghai, P. R. China
| | - Briana M Young
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, USA
| | - Catherine E Hagan
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - Renée M Tsolis
- Department of Medical Microbiology and Immunology, School of Medicine, University of California, Davis, Davis, CA, USA
| | - Alex Mogilner
- Courant Institute and Department of Biology, New York University, New York, NY, USA.
| | - Min Zhao
- Department of Ophthalmology and Vision Science, Department of Dermatology, School of Medicine, University of California, Davis, Sacramento, CA, USA.
| |
Collapse
|
2
|
Wu C, Chen X, Huang W, Yang J, Zhang Z, Liu J, Liu L, Chen Y, Jiang X, Zhang J. Electric fields reverse the differentiation of keratinocyte monolayer by down-regulating E-cadherin through PI3K/AKT/Snail pathway. Heliyon 2024; 10:e33069. [PMID: 39022057 PMCID: PMC11252959 DOI: 10.1016/j.heliyon.2024.e33069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 07/20/2024] Open
Abstract
Re-epithelialization is an important step in skin wound healing, referring to the migration, proliferation, and differentiation of keratinocytes around the wound. During this process, the edges of the wound begin to form new epithelial cells, which migrate from the periphery of the wound towards the center, gradually covering the entire wound area. These newly formed epithelial cells proliferate and differentiate, ultimately forming a protective layer over the exposed dermal surface. Wound endogenous electric fields (EFs) are known as the dominant factor to facilitate the epidermal migration to wound center. However, the precise mechanisms by which EFs promote epidermal migration remains elusive. Here, we found that in a model of cultured keratinocyte monolayer in vitro, EFs application reversed the differentiation of cells, as indicated by the reduction of the early differentiation markers K1 and K10. Genetic manipulation confirmed that EFs reversed keratinocyte differentiation through down-regulating the E-cadherin-mediated adhesion. By RNA-sequencing analysis, we screened out Snail as the transcription suppressor of E-cadherin. Snail knockdown abolished the down-regulation of E-cadherin and the reversal of differentiation induced by EFs. KEGG analysis identified PI3K/AKT signaling for Snail induction under EFs. Inhibition of PI3K by LY294002 diminished the EFs-induced AKT activation and Snail augmentation, largely restoring the level of E-cadherin reduced by EFs. Finally, in model of full-thickness skin wounds in pigs, we found that weakening of the wound endogenous EFs by the direction-reversed exogenous EFs resulted in an up-regulation of E-cadherin and earlier differentiation in newly formed epidermis in vivo. Our research suggests that electric fields (EFs) decrease E-cadherin expression by suppressing the PI3K/AKT/Snail pathway, thereby reversing the differentiation of keratinocytes. This discovery provides us with new insights into the role of electric fields in wound healing. EFs intervene in intracellular signaling pathways, inhibiting the expression of E-cadherin, which results in a lower differentiation state of keratinocytes. In this state, keratinocytes exhibit increased migratory capacity, facilitating the migration of epidermal cells and wound reepithelialization.
Collapse
Affiliation(s)
- Chao Wu
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Xu Chen
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Wanqi Huang
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jinrui Yang
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
- Burns and Plastic Surgery Centre, General Hospital of Xinjiang Military Command, Xinjiang, 830000, China
| | - Ze Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jie Liu
- Department of Plastic and Maxillofacial Surgery, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, China
| | - Luojia Liu
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Ying Chen
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Xupin Jiang
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - Jiaping Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma and Chemical Poisoning, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| |
Collapse
|
3
|
Zhou Y, Ma X, Yu C, Tian Y, Liang Q, Xin M, Sun P, Liu F, Chao D, Jia X, Wang C, Lu G. A Wearable Self-Charging Electroceutical Device for Bacteria-Infected Wound Healing. ACS NANO 2024; 18:15681-15694. [PMID: 38848285 DOI: 10.1021/acsnano.4c01818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
The prolonged wound-healing process caused by pathogen infection remains a major public health challenge. The developed electrical antibiotic administration typically requires metal electrodes wired to a continuous power supply, restricting their use beyond clinical environments. To obviate the necessity for antibiotics and an external power source, we have developed a wearable synergistic electroceutical device composed of an air self-charging Zn battery. This battery integrates sustained tissue regeneration and antibacterial modalities while maintaining more than half of the initial capacity after ten cycles of chemical charging. In vitro bacterial/cell coculture with the self-charging battery demonstrates inhibited bacterial activity and enhanced cell function by simulating the endogenous electric field and dynamically engineering the microenvironment with released chemicals. This electroceutical device provides accelerated healing of a bacteria-infected wound by stimulating angiogenesis and modulating inflammation, while effectively inhibiting bacterial growth at the wound site. Considering the simple structure and easy operation for long-term treatment, this self-charging electroceutical device offers great potential for personalized wound care.
Collapse
Affiliation(s)
- Yan Zhou
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Xuenan Ma
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Changchun Yu
- School of Ophthalmology and Optometry, School of Biomedical Engineering, State Key Laboratory of Ophthalmology, Optometry, and Vision Science, Wenzhou Medical University, Wenzhou 325027, China
| | - Yaping Tian
- Department of Dermatology and Venerology of the First Hospital, Jilin University, Changchun 130021, China
| | - Qin Liang
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Meiying Xin
- Jilin Provincial Key Laboratory of Pediatric Neurology, Department of Pediatric Neurology, The First Hospital of Jilin University, Changchun 130021, China
| | - Peng Sun
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Fangmeng Liu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| | - Danming Chao
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Xiaoteng Jia
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Caiyun Wang
- Intelligent Polymer Research Institute, AIIM Facility, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Geyu Lu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
| |
Collapse
|
4
|
Hu Y, Wang Y, Yang F, Liu D, Lu G, Li S, Wei Z, Shen X, Jiang Z, Zhao Y, Pang Q, Song B, Shi Z, Shafique S, Zhou K, Chen X, Su W, Jian J, Tang K, Liu T, Zhu Y. Flexible Organic Photovoltaic-Powered Hydrogel Bioelectronic Dressing With Biomimetic Electrical Stimulation for Healing Infected Diabetic Wounds. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307746. [PMID: 38145346 PMCID: PMC10933690 DOI: 10.1002/advs.202307746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/28/2023] [Indexed: 12/26/2023]
Abstract
Electrical stimulation (ES) is proposed as a therapeutic solution for managing chronic wounds. However, its widespread clinical adoption is limited by the requirement of additional extracorporeal devices to power ES-based wound dressings. In this study, a novel sandwich-structured photovoltaic microcurrent hydrogel dressing (PMH dressing) is designed for treating diabetic wounds. This innovative dressing comprises flexible organic photovoltaic (OPV) cells, a flexible micro-electro-mechanical systems (MEMS) electrode, and a multifunctional hydrogel serving as an electrode-tissue interface. The PMH dressing is engineered to administer ES, mimicking the physiological injury current occurring naturally in wounds when exposed to light; thus, facilitating wound healing. In vitro experiments are performed to validate the PMH dressing's exceptional biocompatibility and robust antibacterial properties. In vivo experiments and proteomic analysis reveal that the proposed PMH dressing significantly accelerates the healing of infected diabetic wounds by enhancing extracellular matrix regeneration, eliminating bacteria, regulating inflammatory responses, and modulating vascular functions. Therefore, the PMH dressing is a potent, versatile, and effective solution for diabetic wound care, paving the way for advancements in wireless ES wound dressings.
Collapse
Affiliation(s)
- Yi‐Wei Hu
- Health Science CenterNingbo UniversityNingbo315211P. R. China
- Orthopaedic Oncology Center of Changzheng HospitalNaval Medical UniversityShanghai200003P. R. China
| | - Yu‐Heng Wang
- Faculty of Electrical Engineering and Computer ScienceNingbo UniversityNingbo315211P. R. China
- State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049P. R. China
- CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Fang Yang
- Health Science CenterNingbo UniversityNingbo315211P. R. China
| | - Ding‐Xin Liu
- State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Guang‐Hao Lu
- State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Sheng‐Tao Li
- State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Zhi‐Xiang Wei
- CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Xiang Shen
- The Research Institute of Advanced TechnologiesNingbo UniversityNingbo315211P. R. China
| | - Zhuang‐De Jiang
- State Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Yi‐Fan Zhao
- State Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Qian Pang
- Health Science CenterNingbo UniversityNingbo315211P. R. China
| | - Bai‐Yang Song
- Health Science CenterNingbo UniversityNingbo315211P. R. China
| | - Ze‐Wen Shi
- Health Science CenterNingbo UniversityNingbo315211P. R. China
| | - Shareen Shafique
- School of Physical Science and TechnologyNingbo UniversityNingbo315211P. R. China
| | - Kun Zhou
- Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong Kong ShenzhenShenzhen518172P. R. China
| | - Xiao‐Lian Chen
- Printable Electronics Research Center & Nano‐Device and Materials DivisionSuzhou Institute of Nano‐Tech and Nano‐BionicsNano Chinese Academy of SciencesSuzhou215123P. R. China
| | - Wen‐Ming Su
- Printable Electronics Research Center & Nano‐Device and Materials DivisionSuzhou Institute of Nano‐Tech and Nano‐BionicsNano Chinese Academy of SciencesSuzhou215123P. R. China
| | - Jia‐Wen Jian
- Faculty of Electrical Engineering and Computer ScienceNingbo UniversityNingbo315211P. R. China
| | - Ke‐Qi Tang
- Institute of Mass SpectrometrySchool of Material Science and Chemical EngineeringNingbo UniversityNingbo315211P. R. China
| | - Tie‐Long Liu
- Orthopaedic Oncology Center of Changzheng HospitalNaval Medical UniversityShanghai200003P. R. China
| | - Ya‐Bin Zhu
- Health Science CenterNingbo UniversityNingbo315211P. R. China
| |
Collapse
|
5
|
Mai K, Maverakis E, Li J, Zhao M. Maintaining and Restoring Gradients of Ions in the Epidermis: The Role of Ion and Water Channels in Acute Cutaneous Wound Healing. Adv Wound Care (New Rochelle) 2023; 12:696-709. [PMID: 37051706 PMCID: PMC10615091 DOI: 10.1089/wound.2022.0128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 04/09/2023] [Indexed: 04/14/2023] Open
Abstract
Significance: Aquaporins and ion channels establish and regulate gradients of calcium, sodium, potassium, chloride, water, and protons in the epidermis. These elements have been found to play significant roles in skin biology and wound healing. In this study, we review our understanding of these channels and ion gradients, with a special emphasis on their role in acute wound healing. Recent Advances: Specifically, we assess the temporal and spatial arrangements of ions and their respective channels in the intact skin and during wound and healing to provide a novel perspective of the role of ionic gradients through the various stages of wound healing. Critical Issues: The roles of gradients of ions and channels in wound healing are currently not well understood. A collective analysis of their traits and arrangements in the skin during wound healing may provide a new perspective and understanding of the functionality of gradients of ions and channels in skin biology and wound healing. Future Directions: It is important to elucidate how the gradients of ions and ion channels regulate and facilitate wound healing. A better understanding of the ionic environments may identify novel therapeutic targets and improved strategies to promote wound healing and possibly treat other cutaneous diseases.
Collapse
Affiliation(s)
- Kevin Mai
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, California, USA
| | - Emanual Maverakis
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - Jung Li
- Des Moines University College of Osteopathic Medicine, Des Moines, Iowa, USA
| | - Min Zhao
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
- Department of Ophthalmology & Vision Science, University of California, Davis, Sacramento, California, USA
| |
Collapse
|
6
|
Casal D, Casimiro MH, Ferreira LM, Leal JP, Rodrigues G, Lopes R, Moura DL, Gonçalves L, Lago JB, Pais D, Santos PMP. Review of Piezoelectrical Materials Potentially Useful for Peripheral Nerve Repair. Biomedicines 2023; 11:3195. [PMID: 38137416 PMCID: PMC10740581 DOI: 10.3390/biomedicines11123195] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
It has increasingly been recognized that electrical currents play a pivotal role in cell migration and tissue repair, in a process named "galvanotaxis". In this review, we summarize the current evidence supporting the potential benefits of electric stimulation (ES) in the physiology of peripheral nerve repair (PNR). Moreover, we discuss the potential of piezoelectric materials in this context. The use of these materials has deserved great attention, as the movement of the body or of the external environment can be used to power internally the electrical properties of devices used for providing ES or acting as sensory receptors in artificial skin (e-skin). The fact that organic materials sustain spontaneous degradation inside the body means their piezoelectric effect is limited in duration. In the case of PNR, this is not necessarily problematic, as ES is only required during the regeneration period. Arguably, piezoelectric materials have the potential to revolutionize PNR with new biomedical devices that range from scaffolds and nerve-guiding conduits to sensory or efferent components of e-skin. However, much remains to be learned regarding piezoelectric materials, their use in manufacturing of biomedical devices, and their sterilization process, to fine-tune their safe, effective, and predictable in vivo application.
Collapse
Affiliation(s)
- Diogo Casal
- Departamento de Anatomia, NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM), Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal; (L.G.); (D.P.)
- Plastic and Reconstructive Surgery Department and Burn Unit, Centro Hospitalar Universitário de Lisboa Central, Rua José António Serrano, 1169-045 Lisbon, Portugal
| | - Maria Helena Casimiro
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico (IST), Universidade de Lisboa, 2695-066 Bobadela, Portugal; (M.H.C.); (P.M.P.S.)
| | - Luís M. Ferreira
- Departamento de Engenharia e Ciências Nucleares (DECN), Instituto Superior Técnico (IST), Universidade de Lisboa, 2695-066 Bobadela, Portugal;
| | - João Paulo Leal
- Centro de Química Estrutural (CQE), Institute of Molecular Sciences (IMS), Instituto Superior Técnico (IST), Universidade de Lisboa, 2695-066 Bobadela, Portugal;
| | - Gabriela Rodrigues
- Centro de Ecologia, Evolução e Alterações Ambientais (cE3c) & CHANGE—Global Change and Sustainability Institute, Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa (FCUL), 1749-016 Lisboa, Portugal;
| | - Raquel Lopes
- Gynaecology and Obstetrics Department, Maternidade Alfredo da Costa, Centro Hospitalar Universitário de Lisboa Central, R. Viriato 1, 2890-495 Lisboa, Portugal;
| | - Diogo Lino Moura
- Anatomy Institute and Orthopedics Department, Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal;
- Spine Unit, Orthopedics Department, Coimbra University Hospital, 3000-602 Coimbra, Portugal
| | - Luís Gonçalves
- Departamento de Anatomia, NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM), Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal; (L.G.); (D.P.)
| | - João B. Lago
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa (FCUL), 1749-016 Lisboa, Portugal;
| | - Diogo Pais
- Departamento de Anatomia, NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM), Universidade NOVA de Lisboa, 1169-056 Lisboa, Portugal; (L.G.); (D.P.)
| | - Pedro M. P. Santos
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico (IST), Universidade de Lisboa, 2695-066 Bobadela, Portugal; (M.H.C.); (P.M.P.S.)
| |
Collapse
|
7
|
Jang HJ, Tiruneh DM, Ryu H, Yoon JK. Piezoelectric and Triboelectric Nanogenerators for Enhanced Wound Healing. Biomimetics (Basel) 2023; 8:517. [PMID: 37999158 PMCID: PMC10669670 DOI: 10.3390/biomimetics8070517] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/22/2023] [Accepted: 10/30/2023] [Indexed: 11/25/2023] Open
Abstract
Wound healing is a highly orchestrated biological process characterized by sequential phases involving inflammation, proliferation, and tissue remodeling, and the role of endogenous electrical signals in regulating these phases has been highlighted. Recently, external electrostimulation has been shown to enhance these processes by promoting cell migration, extracellular matrix formation, and growth factor release while suppressing pro-inflammatory signals and reducing the risk of infection. Among the innovative approaches, piezoelectric and triboelectric nanogenerators have emerged as the next generation of flexible and wireless electronics designed for energy harvesting and efficiently converting mechanical energy into electrical power. In this review, we discuss recent advances in the emerging field of nanogenerators for harnessing electrical stimulation to accelerate wound healing. We elucidate the fundamental mechanisms of wound healing and relevant bioelectric physiology, as well as the principles underlying each nanogenerator technology, and review their preclinical applications. In addition, we address the prominent challenges and outline the future prospects for this emerging era of electrical wound-healing devices.
Collapse
Affiliation(s)
- Hye-Jeong Jang
- Department of Systems Biotechnology, Chung-Ang University, Anseong-si 17546, Gyeonggi-do, Republic of Korea;
| | - Daniel Manaye Tiruneh
- Department of Intelligence Energy and Industry, Chung-Ang University, Seoul 06974, Republic of Korea;
| | - Hanjun Ryu
- Department of Intelligence Energy and Industry, Chung-Ang University, Seoul 06974, Republic of Korea;
- Department of Advanced Materials Engineering, Chung-Ang University, Anseong-si 17546, Gyeonggi-do, Republic of Korea
| | - Jeong-Kee Yoon
- Department of Systems Biotechnology, Chung-Ang University, Anseong-si 17546, Gyeonggi-do, Republic of Korea;
| |
Collapse
|
8
|
Wang X, Yang J, Luo S, Zhang H, Liu B, Pan Z. Study of Salidroside and Its Inflammation Targeting Emulsion Gel for Wound Repair. Molecules 2023; 28:5151. [PMID: 37446812 DOI: 10.3390/molecules28135151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
Salidroside has been widely used in anti-tumor, cardiovascular, and cerebrovascular protection. However, there are few reports of its use for wound repair. Herein, salidroside inflammation-targeted emulsion gel and non-targeted emulsion gel were developed for wound repair. The inflammation-targeted emulsion gels showed an overall trend of better transdermal penetration and lower potential than non-targeted emulsion gels (-58.7 mV and -1.6 mV, respectively). The apparent improvement of the trauma surface was significant in each administration group. There was a significant difference in the rate of wound healing of the rats between each administration group and the model group at days 7 and 14. Pathological tissue sections showed that inflammatory cells in the epidermis, dermis, and basal layer were significantly reduced, and the granulation tissue was proliferated in the inflammation-targeted emulsion gel group and the non-targeted emulsion gel group. Regarding the expressions of EGF and bFGF, the expressions of bFGF and EGF in the tissues of the inflammation-targeted group at days 7, 14, or 21 were significantly higher than that of the non-targeted emulsion gel group and the model group, both of which were statistically significant compared with the model group (p < 0.05). These results demonstrated that salidroside has the potential as an alternative drug for wound repair.
Collapse
Affiliation(s)
- Xiaojie Wang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
- School of Biological Engineering, Beijing Polytechnic, Beijing 100176, China
| | - Jun Yang
- School of Biological Engineering, Beijing Polytechnic, Beijing 100176, China
| | - Shuai Luo
- School of Biological Engineering, Beijing Polytechnic, Beijing 100176, China
| | - Hucheng Zhang
- School of Biological Engineering, Beijing Polytechnic, Beijing 100176, China
| | - Bo Liu
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhiquan Pan
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| |
Collapse
|
9
|
Zhang Y, Xu G, Wu J, Lee RM, Zhu Z, Sun Y, Zhu K, Losert W, Liao S, Zhang G, Pan T, Xu Z, Lin F, Zhao M. Propagation dynamics of electrotactic motility in large epithelial cell sheets. iScience 2022; 25:105136. [PMID: 36185354 PMCID: PMC9523412 DOI: 10.1016/j.isci.2022.105136] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 03/17/2022] [Accepted: 09/09/2022] [Indexed: 11/20/2022] Open
Abstract
Directional migration initiated at the wound edge leads epithelia to migrate in wound healing. How such coherent migration is achieved is not well understood. Here, we used electric fields to induce robust migration of sheets of human keratinocytes and developed an in silico model to characterize initiation and propagation of epithelial collective migration. Electric fields initiate an increase in migration directionality and speed at the leading edge. The increases propagate across the epithelial sheets, resulting in directional migration of cell sheets as coherent units. Both the experimental and in silico models demonstrated vector-like integration of the electric and default directional cues at free edge in space and time. The resultant collective migration is consistent in experiments and modeling, both qualitatively and quantitatively. The keratinocyte model thus faithfully reflects key features of epithelial migration as a coherent tissue in vivo, e.g. that leading cells lead, and that epithelium maintains cell-cell junction.
Collapse
Affiliation(s)
- Yan Zhang
- Department of Ophthalmology and Vision Science, University of California, Davis, Davis, CA 95616, USA
- School of Public Health, Hangzhou Normal University, Hangzhou 310018, China
- Institute of Environmental Medicine, Zhejiang University School of Medicine, Hangzhou 310058, China
- Micro-Nano Innovations (MiNI) Laboratory, Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, USA
| | - Guoqing Xu
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
- Department of Applied Computer Science, University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
| | - Jiandong Wu
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Shenzhen 518055, China
| | - Rachel M. Lee
- Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA
| | - Zijie Zhu
- Micro-Nano Innovations (MiNI) Laboratory, Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, USA
| | - Yaohui Sun
- Department of Ophthalmology and Vision Science, University of California, Davis, Davis, CA 95616, USA
| | - Kan Zhu
- Department of Ophthalmology and Vision Science, University of California, Davis, Davis, CA 95616, USA
| | - Wolfgang Losert
- Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA
- Department of Physics, University of Maryland, College Park, MD 20742, USA
| | - Simon Liao
- Department of Applied Computer Science, University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
| | - Gong Zhang
- Department of Applied Computer Science, University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
- Brain Engineering Center, Anhui University, Hefei 230601, China
| | - Tingrui Pan
- Micro-Nano Innovations (MiNI) Laboratory, Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, USA
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Shenzhen 518055, China
- Shenzhen Engineering Laboratory of Single-molecule Detection and Instrument Development, Shenzhen, Guangdong 518055, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China
| | - Zhengping Xu
- Institute of Environmental Medicine, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Francis Lin
- Department of Ophthalmology and Vision Science, University of California, Davis, Davis, CA 95616, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Min Zhao
- Department of Ophthalmology and Vision Science, University of California, Davis, Davis, CA 95616, USA
- Department of Dermatology, University of California, Davis, Davis, CA 95616, USA
| |
Collapse
|
10
|
Kodolova-Chukhontseva VV, Shishov MA, Kolbe KA, Smirnova NV, Dobrovol’skaya IP, Dresvyanina EN, Bystrov SG, Terebova NS, Kamalov AM, Bursian AE, Ivan’kova EM, Yudin VE. Conducting Composite Material Based on Chitosan and Single-Wall Carbon Nanotubes for Cellular Technologies. Polymers (Basel) 2022; 14:polym14163287. [PMID: 36015544 PMCID: PMC9413541 DOI: 10.3390/polym14163287] [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: 07/22/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 11/17/2022] Open
Abstract
Biocompatible electrically conducting chitosan-based films filled with single-wall carbon nanotubes were obtained. Atomic force microscopic studies of the free surface topography revealed a change in the morphology of chitosan films filled with single-wall carbon nanotubes. Introducing 0.5 wt.% of single-wall carbon nanotubes into chitosan results in an increase in tensile strength of the films (up to ~180 MPa); the tensile strain values also rise up to ~60%. It was demonstrated that chitosan films containing 0.1–3.0 wt.% of single-wall carbon nanotubes have higher conductivity (10 S/m) than pure chitosan films (10−11 S/m). The investigation of electrical stimulation of human dermal fibroblasts on chitosan/single-wall carbon nanotubes film scaffolds showed that the biological effect of cell electrical stimulation depends on the content of single-walled carbon nanotubes in the chitosan matrix.
Collapse
Affiliation(s)
- Vera Vladimirovna Kodolova-Chukhontseva
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
| | - Mikhail Alexandrovich Shishov
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
| | - Konstantin Andreevich Kolbe
- Laboratory No 8—Mechanics of Polymers and Composite, Institute of Macromolecular Compounds Russian Academy of Science, V.O., Bolshoy pr. 31, 199004 Saint-Petersburg, Russia
| | - Natalia Vladimirovna Smirnova
- Laboratory No 8—Mechanics of Polymers and Composite, Institute of Macromolecular Compounds Russian Academy of Science, V.O., Bolshoy pr. 31, 199004 Saint-Petersburg, Russia
| | - Irina Petrovna Dobrovol’skaya
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
| | - Elena Nikolaevna Dresvyanina
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
- Institute of Textile and Fashion, Saint Petersburg State University of Industrial Technologies and Design, Bolshaya Morskaya Street, 18, 191186 Saint-Petersburg, Russia
- Correspondence:
| | - Sergei Gennadievich Bystrov
- Department of Physics and Surface Chemistry, Udmurt Federal Research Center UB RAS, Tatiana Baramzina Str., 34, 426067 Izhevsk, Russia
| | - Nadezda Semenovna Terebova
- Department of Physics and Surface Chemistry, Udmurt Federal Research Center UB RAS, Tatiana Baramzina Str., 34, 426067 Izhevsk, Russia
| | - Almaz Maratovich Kamalov
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
| | - Anna Ericovna Bursian
- Laboratory No 8—Mechanics of Polymers and Composite, Institute of Macromolecular Compounds Russian Academy of Science, V.O., Bolshoy pr. 31, 199004 Saint-Petersburg, Russia
| | - Elena Mikhailovna Ivan’kova
- Laboratory No 8—Mechanics of Polymers and Composite, Institute of Macromolecular Compounds Russian Academy of Science, V.O., Bolshoy pr. 31, 199004 Saint-Petersburg, Russia
| | - Vladimir Evgenievich Yudin
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya Street, 29, 195251 Saint-Petersburg, Russia
| |
Collapse
|
11
|
Kamalov A, Shishov M, Smirnova N, Kodolova-Chukhontseva V, Dobrovol’skaya I, Kolbe K, Didenko A, Ivan’kova E, Yudin V, Morganti P. Influence of Electric Field on Proliferation Activity of Human Dermal Fibroblasts. J Funct Biomater 2022; 13:89. [PMID: 35893457 PMCID: PMC9326723 DOI: 10.3390/jfb13030089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/22/2022] [Accepted: 06/26/2022] [Indexed: 11/16/2022] Open
Abstract
In this work, an electrically conductive composite based on thermoplastic polyimide and graphene was obtained and used as a bioelectrode for electrical stimulation of human dermal fibroblasts. The values of the electrical conductivity of the obtained composite films varied from 10-15 to 102 S/m with increasing graphene content (from 0 to 5.0 wt.%). The characteristics of ionic and electronic currents flowing through the matrix with the superposition of cyclic potentials ± 100 mV were studied. The high stability of the composite was established during prolonged cycling (130 h) in an electric field with a frequency of 0.016 Hz. It was established that the composite films based on polyimide and graphene have good biocompatibility and are not toxic to fibroblast cells. It was shown that preliminary electrical stimulation increases the proliferative activity of human dermal fibroblasts in comparison with intact cells. It is revealed that an electric field with a strength E = 0.02-0.04 V/m applied to the polyimide films containing 0.5-3.0 wt.% of the graphene nanoparticles activates cellular processes (adhesion, proliferation).
Collapse
Affiliation(s)
- Almaz Kamalov
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Mikhail Shishov
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Natalia Smirnova
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Vera Kodolova-Chukhontseva
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Irina Dobrovol’skaya
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Konstantin Kolbe
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Andrei Didenko
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Elena Ivan’kova
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Vladimir Yudin
- Research Laboratory “Polymer Materials for Tissue Engineering and Transplantology”, Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia; (M.S.); (N.S.); (V.K.-C.); (I.D.); (K.K.); (A.D.); (E.I.); (V.Y.)
| | - Pierfrancesco Morganti
- R&D Unit, Academy of History of Healthcare Art, Lungotevere in Sassia 3, 00186 Rome, Italy;
| |
Collapse
|
12
|
Wolf AE, Heinrich MA, Breinyn IB, Zajdel TJ, Cohen DJ. Short-term bioelectric stimulation of collective cell migration in tissues reprograms long-term supracellular dynamics. PNAS NEXUS 2022; 1:pgac002. [PMID: 35360553 PMCID: PMC8962779 DOI: 10.1093/pnasnexus/pgac002] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/03/2021] [Accepted: 01/07/2022] [Indexed: 01/28/2023]
Abstract
The ability to program collective cell migration can allow us to control critical multicellular processes in development, regenerative medicine, and invasive disease. However, while various technologies exist to make individual cells migrate, translating these tools to control myriad, collectively interacting cells within a single tissue poses many challenges. For instance, do cells within the same tissue interpret a global migration 'command' differently based on where they are in the tissue? Similarly, since no stimulus is permanent, what are the long-term effects of transient commands on collective cell dynamics? We investigate these questions by bioelectrically programming large epithelial tissues to globally migrate 'rightward' via electrotaxis. Tissues clearly developed distinct rear, middle, side, and front responses to a single global migration stimulus. Furthermore, at no point poststimulation did tissues return to their prestimulation behavior, instead equilibrating to a 3rd, new migratory state. These unique dynamics suggested that programmed migration resets tissue mechanical state, which was confirmed by transient chemical disruption of cell-cell junctions, analysis of strain wave propagation patterns, and quantification of cellular crowd dynamics. Overall, this work demonstrates how externally driving the collective migration of a tissue can reprogram baseline cell-cell interactions and collective dynamics, even well beyond the end of the global migratory cue, and emphasizes the importance of considering the supracellular context of tissues and other collectives when attempting to program crowd behaviors.
Collapse
Affiliation(s)
- Abraham E Wolf
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | | | | | - Tom J Zajdel
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Daniel J Cohen
- To whom correspondence should be addressed. Address: Attn. , 111 Hoyt Laboratory, Princeton, NJ 08544, USA. E-mail:
| |
Collapse
|
13
|
Regulating Endogenous Neural Stem Cell Activation to Promote Spinal Cord Injury Repair. Cells 2022; 11:cells11050846. [PMID: 35269466 PMCID: PMC8909806 DOI: 10.3390/cells11050846] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 12/12/2022] Open
Abstract
Spinal cord injury (SCI) affects millions of individuals worldwide. Currently, there is no cure, and treatment options to promote neural recovery are limited. An innovative approach to improve outcomes following SCI involves the recruitment of endogenous populations of neural stem cells (NSCs). NSCs can be isolated from the neuroaxis of the central nervous system (CNS), with brain and spinal cord populations sharing common characteristics (as well as regionally distinct phenotypes). Within the spinal cord, a number of NSC sub-populations have been identified which display unique protein expression profiles and proliferation kinetics. Collectively, the potential for NSCs to impact regenerative medicine strategies hinges on their cardinal properties, including self-renewal and multipotency (the ability to generate de novo neurons, astrocytes, and oligodendrocytes). Accordingly, endogenous NSCs could be harnessed to replace lost cells and promote structural repair following SCI. While studies exploring the efficacy of this approach continue to suggest its potential, many questions remain including those related to heterogeneity within the NSC pool, the interaction of NSCs with their environment, and the identification of factors that can enhance their response. We discuss the current state of knowledge regarding populations of endogenous spinal cord NSCs, their niche, and the factors that regulate their behavior. In an attempt to move towards the goal of enhancing neural repair, we highlight approaches that promote NSC activation following injury including the modulation of the microenvironment and parenchymal cells, pharmaceuticals, and applied electrical stimulation.
Collapse
|
14
|
Abe Y, Nishizawa M. Electrical aspects of skin as a pathway to engineering skin devices. APL Bioeng 2021; 5:041509. [PMID: 34849444 PMCID: PMC8604566 DOI: 10.1063/5.0064529] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/27/2021] [Indexed: 02/07/2023] Open
Abstract
Skin is one of the indispensable organs for life. The epidermis at the outermost surface provides a permeability barrier to infectious agents, chemicals, and excessive loss of water, while the dermis and subcutaneous tissue mechanically support the structure of the skin and appendages, including hairs and secretory glands. The integrity of the integumentary system is a key for general health, and many techniques have been developed to measure and control this protective function. In contrast, the effective skin barrier is the major obstacle for transdermal delivery and detection. Changes in the electrical properties of skin, such as impedance and ionic activity, is a practical indicator that reflects the structures and functions of the skin. For example, the impedance that reflects the hydration of the skin is measured for quantitative assessment in skincare, and the current generated across a wound is used for the evaluation and control of wound healing. Furthermore, the electrically charged structure of the skin enables transdermal drug delivery and chemical extraction. This paper provides an overview of the electrical aspects of the skin and summarizes current advances in the development of devices based on these features.
Collapse
Affiliation(s)
- Yuina Abe
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Matsuhiko Nishizawa
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| |
Collapse
|
15
|
Cheah YJ, Buyong MR, Mohd Yunus MH. Wound Healing with Electrical Stimulation Technologies: A Review. Polymers (Basel) 2021; 13:3790. [PMID: 34771347 PMCID: PMC8588136 DOI: 10.3390/polym13213790] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/16/2021] [Accepted: 10/29/2021] [Indexed: 01/22/2023] Open
Abstract
Electrical stimulation (ES) is an attractive field among clinicians in the topic of wound healing, which is common yet complicated and requires multidisciplinary approaches. The conventional dressing and skin graft showed no promise on complete wound closure. These urge the need for the exploration of electrical stimulation to supplement current wound care management. This review aims to provide an overview of electrical stimulation in wound healing. The mechanism of galvanotaxis related to wound repair will be reviewed at the cellular and molecular levels. Meanwhile, different modalities of externally applied electricity mimicking a physiologic electric field will be discussed and compared in vitro, in vivo, and clinically. With the emerging of tissue engineering and regenerative medicine, the integration of electroconductive biomaterials into modern miniaturised dressing is of interest and has become possible with the advancing understanding of smart biomaterials.
Collapse
Affiliation(s)
- Yt Jun Cheah
- Department of Physiology, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur 56600, Malaysia;
| | - Muhamad Ramdzan Buyong
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;
| | - Mohd Heikal Mohd Yunus
- Department of Physiology, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur 56600, Malaysia;
| |
Collapse
|
16
|
Liu A, Long Y, Li J, Gu L, Karim A, Wang X, Gibson ALF. Accelerated complete human skin architecture restoration after wounding by nanogenerator-driven electrostimulation. J Nanobiotechnology 2021; 19:280. [PMID: 34544434 PMCID: PMC8454068 DOI: 10.1186/s12951-021-01036-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/10/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Electrostimulation (ES) therapy for wound healing is limited in clinical use due to barriers such as cumbersome equipment and intermittent delivery of therapy. METHODS We adapted a human skin xenograft model that can be used to directly examine the nanogenerator-driven ES (NG-ES) effects on human skin in vivo-an essential translational step toward clinical application of the NG-ES technique for wound healing. RESULTS We show that NG-ES leads to rapid wound closure with complete restoration of normal skin architecture within 7 days compared to more than 30 days in the literature. NG-ES accelerates the inflammatory phase of wound healing with more rapid resolution of neutrophils and macrophages and enhances wound bed perfusion with more robust neovascularization. CONCLUSION Our results support the translational evaluation and optimization of the NG-ES technology to deliver convenient, efficient wound healing therapy for use in human wounds.
Collapse
Affiliation(s)
- Aiping Liu
- Department of Surgery, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Yin Long
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jun Li
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Long Gu
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Aos Karim
- Department of Surgery, University of Wisconsin-Madison, Madison, WI, 53792, USA
| | - Xudong Wang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA.
| | - Angela L F Gibson
- Department of Surgery, University of Wisconsin-Madison, Madison, WI, 53792, USA.
| |
Collapse
|
17
|
Porous microneedle-based wearable device for monitoring of transepidermal potential. BIOMEDICAL ENGINEERING ADVANCES 2021. [DOI: 10.1016/j.bea.2021.100004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
|
18
|
Ryan CNM, Doulgkeroglou MN, Zeugolis DI. Electric field stimulation for tissue engineering applications. BMC Biomed Eng 2021; 3:1. [PMID: 33397515 PMCID: PMC7784019 DOI: 10.1186/s42490-020-00046-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 12/06/2020] [Indexed: 01/02/2023] Open
Abstract
Electric fields are involved in numerous physiological processes, including directional embryonic development and wound healing following injury. To study these processes in vitro and/or to harness electric field stimulation as a biophysical environmental cue for organised tissue engineering strategies various electric field stimulation systems have been developed. These systems are overall similar in design and have been shown to influence morphology, orientation, migration and phenotype of several different cell types. This review discusses different electric field stimulation setups and their effect on cell response.
Collapse
Affiliation(s)
- Christina N M Ryan
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), National University of Ireland Galway & USI, Galway, Ireland.,Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Meletios N Doulgkeroglou
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), National University of Ireland Galway & USI, Galway, Ireland.,Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Dimitrios I Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), National University of Ireland Galway & USI, Galway, Ireland. .,Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland. .,Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Faculty of Biomedical Sciences, Università della Svizzera Italiana (USI), Lugano, Switzerland.
| |
Collapse
|
19
|
Li M, Wang X, Rajagopalan P, Zhang L, Zhan S, Huang S, Li W, Zeng X, Ye Q, Liu Y, Zhong K, Kim JM, Luo J, Dong S, Gu R, Wang X, Tan WQ. Toward Controlled Electrical Stimulation for Wound Healing Based on a Precision Layered Skin Model. ACS APPLIED BIO MATERIALS 2020; 3:8901-8910. [DOI: 10.1021/acsabm.0c01190] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Menglu Li
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Xiaofeng Wang
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, Zhejiang Province PR China
| | - Pandey Rajagopalan
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Liang Zhang
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Shijie Zhan
- Department of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Shuyi Huang
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Wei Li
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Xiangyu Zeng
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Qikai Ye
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Yulu Liu
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Kai Zhong
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Jong Min Kim
- Department of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Jikui Luo
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Shurong Dong
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Rongcheng Gu
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, United States
| | - Xiaozhi Wang
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of ISEE, Zhejiang University, Hangzhou 310027, China
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310018, China
| | - Wei-Qiang Tan
- Department of Plastic Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou 310016, Zhejiang Province PR China
| |
Collapse
|
20
|
Li L, Hu C, Lu C, Zhang K, Han R, Lin C, Zhao S, A C, Cheng C, Zhao M, He Y. Applied electric fields suppress osimertinib-induced cytotoxicity via inhibiting FOXO3a nuclear translocation through AKT activation. Carcinogenesis 2020; 41:600-610. [PMID: 31504249 DOI: 10.1093/carcin/bgz150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 07/16/2019] [Accepted: 08/29/2019] [Indexed: 12/12/2022] Open
Abstract
Osimertinib is a third-generation epidermal growth factor receptor tyrosine kinase inhibitor against T790M-mutant non-small cell lung cancer (NSCLC). Acquired resistance to osimertinib is a growing clinical challenge that is not fully understood. Endogenous electric fields (EFs), components of the tumor microenvironment, are associated with cancer cell migration and proliferation. However, the impact of EFs on drug efficiency has not been studied. In this study, we observed that EFs counteracted the effects of osimertinib. EFs of 100 mV/mm suppressed osimertinib-induced cell death and promoted cell proliferation. Transcriptional analysis revealed that the expression pattern induced by osimertinib was altered by EFs stimulation. KEGG analysis showed that differential expression genes were mostly enriched in PI3K-AKT pathway. Then, we found that osimertinib inhibited AKT phosphorylation, while EFs stimulation resulted in significant activation of AKT, which could override the effects generated by osimertinib. Importantly, pharmacological inhibition of PI3K/AKT by LY294002 diminished EF-induced activation of AKT and restored the cytotoxicity of osimertinib suppressed by EFs, which proved that AKT activation was essential for EFs to attenuate the efficacy of osimertinib. Furthermore, activation of AKT by EFs led to phosphorylation of forkhead box O3a (FOXO3a), and reduction in nuclear translocation of FOXO3a induced by osimertinib, resulting in decreased expression of Bim and attenuated cytotoxicity of osimertinib. Taken together, we demonstrated that EFs suppressed the antitumor activity of osimertinib through AKT/FOXO3a/Bim pathway, and combination of PI3K/AKT inhibitor with osimertinib counteracted the effects of EFs. Our findings provided preliminary data for therapeutic strategies to enhance osimertinib efficacy in NSCLC patients.
Collapse
Affiliation(s)
- Li Li
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| | - Chen Hu
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| | - Conghua Lu
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| | - Kejun Zhang
- Department of Clinical Laboratory, Daping Hospital, Army Medical University, Chongqing, China
| | - Rui Han
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| | - Caiyu Lin
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| | - Sanjun Zhao
- School of Life Sciences, Yunnan Normal University, Kunming, China
| | - Chunxian A
- School of Life Sciences, Yunnan Normal University, Kunming, China
| | | | - Min Zhao
- Department of Dermatology, Department of Ophthalmology, Institute for Regenerative Cures, University of California, Davis, CA, USA
| | - Yong He
- Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, China
| |
Collapse
|
21
|
Bostan LE, Almqvist S, Pullar CE. A pulsed current electric field alters protein expression creating a wound healing phenotype in human skin cells. Regen Med 2020; 15:1611-1623. [PMID: 32633622 DOI: 10.2217/rme-2019-0087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Pulsed current (PC) electric field (EF) devices promote healing in chronic wounds but the underpinning mechanisms are largely unknown. The gap between clinical evidence and mechanistic understanding limits device uptake in clinics. Materials & methods: Migration, proliferation and gene/protein expression profiles were investigated in the presence/absence of PCEF, in skin: keratinocytes (NHK); dermal fibroblasts (HDF); dermal microvascular endothelial cells (HDMEC) and macrophages (THP-1). Results: While PCEF had little effect on migration or proliferation, it significantly altered the expression of 31 genes and the secretion of 7 pro-angiogenic and pro-regenerative growth factors using ELISAs. Conclusion: PCEF significantly altered skin cell genomes/proteomes which provides some evidence of how PCEF devices promote healing of chronic wounds.
Collapse
Affiliation(s)
- Luciana E Bostan
- University of Southampton, Faculty of Medicine, Southampton, SO16 6YD, UK
| | - Sofia Almqvist
- Mölnlycke Health Care AB, (P.O. Box 13080 SE-402 52) Göteborg, Sweden
| | - Christine E Pullar
- Department of Molecular & Cell Biology, College of Life Sciences, University of Leicester, University Road, Leicester LE1 7RH, UK
| |
Collapse
|
22
|
O'Clock GD, Strouse Watt W. A Model and Simulation With Therapeutic Device-Protocol Design Implications for Acute and Chronic Wounds. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2020; 2020:4967-4973. [PMID: 33019102 DOI: 10.1109/embc44109.2020.9175325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An understanding of healing processes for different tissues and organs, along with the development of appropriate therapeutic devices and treatment protocols, requires an appreciation for the mechanisms-of-action and sequencing of many interconnected chemical, electrical, mechanical, and optical activities. Unfortunately, the substantial contributions that endogenous electrical mechanisms-of-action provide in healing and regulation are often overlooked, resulting in a poor transfer of knowledge from science, to engineering, and finally, to therapy. The wide variety of healing processes, their therapeutic implications, and the devices and protocol designs that are most effective cannot be understood or addressed adequately without an understanding of the endogenous electrical mechanisms-of-action associated with wound healing. Achieving this level of understanding can be enhanced by the use of appropriate models and simulations that are based on physiological/biochemical system response characteristics.
Collapse
|
23
|
Ji R, Teng M, Zhang Z, Wang W, Zhang Q, Lv Y, Zhang J, Jiang X. Electric field down-regulates CD9 to promote keratinocytes migration through AMPK pathway. Int J Med Sci 2020; 17:865-873. [PMID: 32308539 PMCID: PMC7163358 DOI: 10.7150/ijms.42840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 03/02/2020] [Indexed: 12/27/2022] Open
Abstract
Endogenous electric field (EF)-directed keratinocytes migration is known to play a key role in the wound re-epithelialization process. Although many molecules and signaling pathways are reported important for directional keratinocytes migration under EF, the underlying mechanism remains unclear. Our previous research found that CD9, a trans-membrane protein, is involved in wound re-epithelialization and CD9 downregulation contributes to keratinocytes migration. In this study, we observed the effect of EF on CD9 expression and keratinocytes migration. The keratinocytes migrated directionally toward the cathode and CD9 expression was down-regulated under EF (200mV/mm). In addition, CD9 overexpression reversed EF-induced migratory speed and the electrotactic response of keratinocytes. Also, we found that EF reduced AMP-activated protein kinase (AMPK) activity. Furthermore, AICAR, an AMPK activator, increased CD9 expression under EF, while compound C, an AMPK inhibitor, decreased CD9 expression in keratinocytes. Our results demonstrate that EF regulates CD9 expression and keratinocytes directional migration, in which AMPK pathway plays an important role.
Collapse
Affiliation(s)
- Ran Ji
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Miao Teng
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Ze Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Wenping Wang
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Qiong Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Yanling Lv
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jiaping Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Xupin Jiang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| |
Collapse
|
24
|
Physiological strength electric fields modulate human T cell activation and polarisation. Sci Rep 2019; 9:17604. [PMID: 31772211 PMCID: PMC6879562 DOI: 10.1038/s41598-019-53898-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 10/31/2019] [Indexed: 12/24/2022] Open
Abstract
The factors and signals driving T cell activation and polarisation during immune responses have been studied mainly at the level of cells and chemical mediators. Here we describe a physical driver of these processes in the form of physiological-strength electric fields (EFs). EFs are generated at sites where epithelium is disrupted (e.g. wounded skin/bronchial epithelia) and where T cells frequently are present. Using live-cell imaging, we show human primary T cells migrate directionally to the cathode in low strength (50/150 mV/mm) EFs. Strikingly, we show for the first time that EFs significantly downregulate T cell activation following stimulation with antigen-activated APCs or anti-CD3/CD28 antibodies, as demonstrated by decreased IL-2 secretion and proliferation. These EF-induced functional changes were accompanied by a significant dampening of CD4+ T cell polarisation. Expression of critical markers of the Th17 lineage, RORγt and IL-17, and the Th17 polarisation mediator phospho-STAT3 were reduced significantly, while STAT1, ERK and c-Jun phosphorylation were comparatively unaffected suggesting STAT3 modulation by EFs as one mechanism driving effects. Overall, we identify electrical signals as important contributors to the co-ordination and regulation of human T cell functions, paving the way for a new research area into effects of naturally occurring and clinically-applied EFs in conditions where control of T cell activity is paramount.
Collapse
|
25
|
Yan T, Jiang X, Lin G, Tang D, Zhang J, Guo X, Zhang D, Zhang Q, Jia J, Huang Y. Autophagy is required for the directed motility of keratinocytes driven by electric fields. FASEB J 2018; 33:3922-3935. [PMID: 30509146 DOI: 10.1096/fj.201801294r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Endogenous wound electric fields (EFs), an important and fundamental occurrence of wound healing, profoundly influence the directed migration of keratinocytes. Although numerous studies have unveiled the signals responsible for EF-biased direction, the mechanisms by which EFs promote keratinocyte motility remains to be elucidated. In our study, EFs enhanced the directed migratory speed of keratinocytes by inducing autophagic activity, thereby facilitating skin barrier restoration. Initially, we found that electrical signals directed keratinocytes to the cathode with enhanced motility parameters [ i.e., trajectory distance, trajectory speed, displacement distance, and displacement speed ( Td/ t)] and more efficient migration (directionality and Td/ t along the x axis, among others). Meanwhile, EFs induced a time-dependent increase in autophagic activity in keratinocytes, with constant autophagic flux, accompanied by increased transcription of numerous autophagy-related genes. Deficiency in Atg5, a key protein necessary for autophagosome formation, led to significant reduction of autophagy, which was accompanied by a substantial reduction in EF-stimulated directed motility. These results demonstrated a causal relationship between autophagy and EF-directed migratory speed. In addition, both cell migration under normal conditions and EF-biased directionality were autophagy independent. Thus, our findings define autophagy as an important functional regulator of electrically enhanced directed motility, adding to a growing understanding of EFs.-Yan, T., Jiang, X., Lin, G., Tang, D., Zhang, J., Guo, X., Zhang, D., Zhang, Q., Jia, J., Huang, Y. Autophagy is required for the directed motility of keratinocytes driven by electric fields.
Collapse
Affiliation(s)
- Tiantian Yan
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.,Military Burn Center, the 990th (159th) Hospital of the People's Liberation Army, Zhumadian, China
| | - Xupin Jiang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Guoan Lin
- Military Burn Center, the 990th (159th) Hospital of the People's Liberation Army, Zhumadian, China
| | - Di Tang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Junhui Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiaowei Guo
- Department of Burns and Plastic Surgery, the 205th Hospital of the People's Liberation Army, Jinzhou, China
| | - Dongxia Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qiong Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Jiezhi Jia
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yuesheng Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns, and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| |
Collapse
|
26
|
Ashrafi M, Novak-Frazer L, Morris J, Baguneid M, Rautemaa-Richardson R, Bayat A. Electrical stimulation disrupts biofilms in a human wound model and reveals the potential for monitoring treatment response with volatile biomarkers. Wound Repair Regen 2018; 27:5-18. [DOI: 10.1111/wrr.12679] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 10/08/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Mohammed Ashrafi
- Plastic & Reconstructive Surgery Research, Division of Musculoskeletal & Dermatological Sciences; School of Biological Sciences, University of Manchester; Manchester United Kingdom
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Bioengineering Group, School of Materials; University of Manchester; Manchester United Kingdom
| | - Lilyann Novak-Frazer
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Division of Infection, Immunity and Respiratory Medicine; School of Biological Sciences, The University of Manchester and Manchester University NHS Foundation Trust; Manchester United Kingdom
| | - Julie Morris
- Honorary Reader in Medical Statistics; Manchester University NHS Foundation Trust, Wythenshawe Hospital; Manchester United Kingdom
| | - Mohamed Baguneid
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
| | - Riina Rautemaa-Richardson
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Division of Infection, Immunity and Respiratory Medicine; School of Biological Sciences, The University of Manchester and Manchester University NHS Foundation Trust; Manchester United Kingdom
| | - Ardeshir Bayat
- Plastic & Reconstructive Surgery Research, Division of Musculoskeletal & Dermatological Sciences; School of Biological Sciences, University of Manchester; Manchester United Kingdom
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
| |
Collapse
|
27
|
Environmental Factors That Influence Stem Cell Migration: An "Electric Field". Stem Cells Int 2017; 2017:4276927. [PMID: 28588621 PMCID: PMC5447312 DOI: 10.1155/2017/4276927] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/21/2017] [Accepted: 04/11/2017] [Indexed: 01/14/2023] Open
Abstract
Environmental Stimulus of Electric Fields on Stem Cell Migration. The movement of cells in response to electric potential gradients is called galvanotaxis. In vivo galvanotaxis, powered by endogenous electric fields (EFs), plays a critical role during development and wound healing. This review aims to provide a perspective on how stem cells transduce EFs into directed migration and an understanding of the current literature relating to the mechanisms by which cells sense and transduce EFs. We will comment on potential EF-based regenerative medicine therapeutics.
Collapse
|
28
|
Ferreira R, Guirro ECDO, Silva CAD, Polacow MLO. Efeito da estimulação elétrica de alta voltagem e insulina tópica em lesão cutânea experimental. FISIOTERAPIA E PESQUISA 2016. [DOI: 10.1590/1809-2950/15311923042016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO O objetivo deste estudo foi avaliar o efeito da estimulação elétrica de alta voltagem (EEAV) catódica, associada à insulina tópica, em lesão tegumentar de ratos. Para isso, foram utilizados 42 ratos Wistar (240±30 g), submetidos a retirada cirúrgica de 1 cm2 de pele do dorso em seis grupos (n=7), tratados por sete dias consecutivos: controle (C), estimulação elétrica placebo (EP), estimulação elétrica catódica (EE), insulina tópica (IT), insulina placebo (IP) e EEAV associada a insulina tópica (EE+I). A EEAV foi administrada 24 horas após a cirurgia, 30 minutos por dia, com frequência de 100 Hz e voltagem média de 60 V, mantida no limiar motor. Áreas das lesões foram registradas macroscopicamente no primeiro, quarto e oitavo dia, sendo submetidas a tratamento histológico para inclusão em paraplast® e coloração em hematoxilina e eosina. A epitelização e o perfil numérico das células foram obtidos por análises histométricas. Utilizou-se o teste de Shapiro-Wilk e ANOVA one-way seguida de Bonferrone (p<0,05). Observou-se redução significativa na área da lesão no oitavo dia de tratamento, nos grupos EE e EE+I em relação aos demais grupos. A reepitelização não diferiu entre os grupos, mas a distância entre as bordas da lesão foi menor nos grupos EE e EE+I. Nesses grupos houve aumento significativo (p<0,05) no número de fibroblastos e diminuição de leucócitos. Pode-se concluir que a EEAV catódica acelerou o processo de reparação da lesão, não demonstrando efeito adicional com a aplicação da insulina tópica.
Collapse
|
29
|
Electric field as a potential directional cue in homing of bone marrow-derived mesenchymal stem cells to cutaneous wounds. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1864:267-279. [PMID: 27864076 DOI: 10.1016/j.bbamcr.2016.11.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 02/02/2023]
Abstract
Bone marrow-derived cells are thought to participate and enhance the healing process contributing to skin cells or releasing regulatory cytokines. Directional cell migration in a weak direct current electric field (DC-EF), known as electrotaxis, may be a way of cell recruitment to the wound site. Here we examined the influence of electric field on bone marrow adherent cells (BMACs) and its potential role as a factor attracting mesenchymal stem cells to cutaneous wounds. We observed that in an external EF, BMAC movement was accelerated and highly directed with distinction of two cell populations migrating toward opposite poles: mesenchymal stem cells migrated toward the cathode, whereas macrophages toward the anode. Analysis of intracellular pathways revealed that macrophage electrotaxis mostly depended on Rho family small GTPases and calcium ions, but interruption of PI3K and Arp2/3 had the most pronounced effect on electrotaxis of MSCs. However, in all cases we observed only a partial decrease in directionality of cell movement after inhibition of certain proteins. Additionally, although we noticed the accumulation of EGFR at the cathodal side of MSCs, it was not involved in electrotaxis. Moreover, the cell reaction to EF was very dynamic with first symptoms occurring within <1min. In conclusion, the physiological DC-EF may act as a factor positioning bone marrow cells within a wound bed and the opposite direction of MSC and macrophage movement did not result either from utilizing different signalling or redistribution of investigated cell surface receptors.
Collapse
|
30
|
Sebastian A, Volk SW, Halai P, Colthurst J, Paus R, Bayat A. Enhanced Neurogenic Biomarker Expression and Reinnervation in Human Acute Skin Wounds Treated by Electrical Stimulation. J Invest Dermatol 2016; 137:737-747. [PMID: 27856290 DOI: 10.1016/j.jid.2016.09.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 08/20/2016] [Accepted: 09/19/2016] [Indexed: 11/27/2022]
Abstract
Electrical stimulation (ES) is known to promote cutaneous healing; however, its ability to regulate reinnervation remains unclear. First, we show that ES treatment of human acute cutaneous wounds (n = 40) increased reinnervation. Next, to define neurophysiologic mechanisms through which ES affects repair, microarray analysis of wound biopsy samples was performed on days 3, 7, 10, and 14 after wounding. This identified neural differentiation biomarkers TUBB3 (melanocyte development and neuronal marker) and its upstream molecule FIG4 (phosphatidylinositol (3,5)-bisphosphate 5-phosphatase) as significantly up-regulated after ES treatment. To demonstrate a functional ES-TUBB3 axis in cutaneous healing, we showed increased TUBB3+ melanocytes and melanogenesis plus FIG4 and nerve growth factor expression, suggesting higher cellular differentiation. In support of this role of ES to regulate neural crest-derived cell fate and differentiation in vivo, knockdown of FIG4 in neuroblastoma cells resulted in vacuologenesis and cell degeneration, whereas ES treatment after FIG4-small interfering RNA transfection enhanced neural differentiation, survival, and integrity. Further characterization showed increased TUBB3+ and protein gene product 9.5+ Merkel cells during in vivo repair, after ES. We demonstrate that ES contributes to increased expression of neural differentiation biomarkers, reinnervation, and expansion of melanocyte and Merkel cell pool during repair. Targeted ES-assisted acceleration of healing has significant clinical implications.
Collapse
Affiliation(s)
- Anil Sebastian
- Plastic Surgery Research Group, Dermatology Research Centre, Institute of Inflammation & Repair, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
| | - Susan W Volk
- Section of Surgery, Department of Clinical Studies-Philadelphia, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania, USA
| | - Poonam Halai
- Plastic Surgery Research Group, Dermatology Research Centre, Institute of Inflammation & Repair, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
| | | | - Ralf Paus
- Hair Follicle Biology Research Group, Dermatology Research Centre, Institute of Inflammation & Repair, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK; Department of Dermatology, University of Muenster, Muenster, Germany
| | - Ardeshir Bayat
- Plastic Surgery Research Group, Dermatology Research Centre, Institute of Inflammation & Repair, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK.
| |
Collapse
|
31
|
Zhang G, Gu Y, Begum R, Chen H, Gao X, McGrath JA, Parsons M, Song B. Kindlin-1 Regulates Keratinocyte Electrotaxis. J Invest Dermatol 2016; 136:2229-2239. [PMID: 27427485 PMCID: PMC5756539 DOI: 10.1016/j.jid.2016.05.129] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 04/18/2016] [Accepted: 05/10/2016] [Indexed: 12/05/2022]
Abstract
Kindler syndrome (KS) is an autosomal recessive blistering skin disease resulting from pathogenic mutations in FERMT1. This gene encodes kindlin-1, a focal adhesion protein involved in activation of the integrin family of extracellular matrix receptors. Most cases of KS show a marked reduction or complete absence of the kindlin-1 protein in keratinocytes, resulting in defective cell adhesion and migration. Electric fields also act as intrinsic regulators of adhesion and migration in the skin, but the molecular mechanisms by which this occurs are poorly understood. Here we show that keratinocytes derived from KS patients are unable to undergo electrotaxis, and this defect is restored by overexpression of wild-type kindlin-1 but not a W612A mutation that prevents kindlin-integrin binding. Moreover, deletion of the pleckstrin homology domain of kindlin-1 also failed to rescue electrotaxis in KS cells, indicating that both integrin and lipid binding are required for this function. Kindlin-1 was also required for the maintenance of lamellipodial protrusions during electrotaxis via electric field-activated β1 integrin. Indeed, inhibition of β1 integrins also leads to loss of electrotaxis in keratinocytes. Our data suggest that loss of kindlin-1 function may therefore result in epithelial insensitivity to electric fields and contribute to KS disease pathology.
Collapse
Affiliation(s)
- Gaofeng Zhang
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China; School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Yu Gu
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - Rumena Begum
- Randall Division of Cell and Molecular Biophysics, Kings College London, London, UK
| | - Hongduo Chen
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China
| | - Xinghua Gao
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China
| | - John A McGrath
- St. Johns Institute of Dermatology, King's College London, Guys Campus, London, UK
| | - Maddy Parsons
- Randall Division of Cell and Molecular Biophysics, Kings College London, London, UK.
| | - Bing Song
- Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China; School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK.
| |
Collapse
|
32
|
The Epithelial Sodium Channel and the Processes of Wound Healing. BIOMED RESEARCH INTERNATIONAL 2016; 2016:5675047. [PMID: 27493961 PMCID: PMC4963570 DOI: 10.1155/2016/5675047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/15/2016] [Indexed: 12/19/2022]
Abstract
The epithelial sodium channel (ENaC) mediates passive sodium transport across the apical membranes of sodium absorbing epithelia, like the distal nephron, the intestine, and the lung airways. Additionally, the channel has been involved in the transduction of mechanical stimuli, such as hydrostatic pressure, membrane stretch, and shear stress from fluid flow. Thus, in vascular endothelium, it participates in the control of the vascular tone via its activity both as a sodium channel and as a shear stress transducer. Rather recently, ENaC has been shown to participate in the processes of wound healing, a role that may also involve its activities as sodium transporter and as mechanotransducer. Its presence as the sole channel mediating sodium transport in many tissues and the diversity of its functions probably underlie the complexity of its regulation. This brief review describes some aspects of ENaC regulation, comments on evidence about ENaC participation in wound healing, and suggests possible regulatory mechanisms involved in this participation.
Collapse
|
33
|
Riding A, Pullar CE. ATP Release and P2 Y Receptor Signaling are Essential for Keratinocyte Galvanotaxis. J Cell Physiol 2016; 231:181-91. [PMID: 26058714 DOI: 10.1002/jcp.25070] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 06/05/2015] [Indexed: 01/06/2023]
Abstract
Repair to damaged tissue requires directional cell migration to heal the wound. Immediately upon wounding an electrical guidance cue is created with the cathode of the electric field (EF) located at the center of the wound. Previous research has demonstrated directional migration of keratinocytes toward the cathode when an EF of physiological strength (100-150 mV/mm) is applied in vitro, but the "sensor" by which keratinocytes sense the EF remains elusive. Here we use a customized chamber design to facilitate the application of a direct current (DC) EF of physiological strength (100 mV/mm) to keratinocytes whilst pharmacologically modulating the activation of both connexin hemichannels and purinergic receptors to determine their role in EF-mediated directional keratinocyte migration, galvanotaxis. In addition, keratinocytes were exposed to DiSCAC2 (3) dye to visualize membrane potential changes within the cell upon exposure to the applied DC EF. Here we unveil ATP-medicated mechanisms that underpin the initiation of keratinocyte galvanotaxis. The application of a DC EF of 100 mV/mm releases ATP via hemichannels activating a subset of purinergic P2 Y receptors, locally, to initiate the directional migration of keratinocytes toward the cathode in vitro, the center of the wound in vivo. The delineation of the mechanisms underpinning galvanotaxis extends our understanding of this endogenous cue and will facilitate the optimization and wider use of EF devices for chronic wound treatment. J. Cell. Physiol. 230: 181-191, 2016. © 2015 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Aimie Riding
- Department of Cell Physiology and Pharmacology, University of Leicester, Leicester, UK
| | - Christine E Pullar
- Department of Cell Physiology and Pharmacology, University of Leicester, Leicester, UK
| |
Collapse
|
34
|
Gao R, Zhao S, Jiang X, Sun Y, Zhao S, Gao J, Borleis J, Willard S, Tang M, Cai H, Kamimura Y, Huang Y, Jiang J, Huang Z, Mogilner A, Pan T, Devreotes PN, Zhao M. A large-scale screen reveals genes that mediate electrotaxis in Dictyostelium discoideum. Sci Signal 2015; 8:ra50. [PMID: 26012633 PMCID: PMC4470479 DOI: 10.1126/scisignal.aab0562] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Directional cell migration in an electric field, a phenomenon called galvanotaxis or electrotaxis, occurs in many types of cells, and may play an important role in wound healing and development. Small extracellular electric fields can guide the migration of amoeboid cells, and we established a large-scale screening approach to search for mutants with electrotaxis phenotypes from a collection of 563 Dictyostelium discoideum strains with morphological defects. We identified 28 strains that were defective in electrotaxis and 10 strains with a slightly higher directional response. Using plasmid rescue followed by gene disruption, we identified some of the mutated genes, including some previously implicated in chemotaxis. Among these, we studied PiaA, which encodes a critical component of TORC2, a kinase protein complex that transduces changes in motility by activating the kinase PKB (also known as Akt). Furthermore, we found that electrotaxis was decreased in mutants lacking gefA, rasC, rip3, lst8, or pkbR1, genes that encode other components of the TORC2-PKB pathway. Thus, we have developed a high-throughput screening technique that will be a useful tool to elucidate the molecular mechanisms of electrotaxis.
Collapse
Affiliation(s)
- Runchi Gao
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China. Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA. Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Siwei Zhao
- Department of Biomedical Engineering, University of California at Davis, Davis, CA 95616, USA
| | - Xupin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing 400042, China
| | - Yaohui Sun
- Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA
| | - Sanjun Zhao
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China. Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA
| | - Jing Gao
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China. Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA
| | - Jane Borleis
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Stacey Willard
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Ming Tang
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Huaqing Cai
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Yoichiro Kamimura
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Yuesheng Huang
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing 400042, China
| | - Jianxin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing 400042, China
| | - Zunxi Huang
- School of Life Sciences, Yunnan Normal University, Kunming, Yunnan 650500, China
| | - Alex Mogilner
- Courant Institute and Department of Biology, New York University, 251 Mercer Street, New York, NY 10012, USA
| | - Tingrui Pan
- Department of Biomedical Engineering, University of California at Davis, Davis, CA 95616, USA
| | - Peter N Devreotes
- Department of Cell Biology and Anatomy, Johns Hopkins University, School of Medicine, Baltimore, MD 21205, USA
| | - Min Zhao
- Departments of Dermatology and Ophthalmology, Institute for Regenerative Cures, School of Medicine, University of California at Davis, Davis, CA 95817, USA.
| |
Collapse
|
35
|
Park S, Kim H, Makin I, Skiba J, Izadjoo M. Measurement of microelectric potentials in a bioelectrically-active wound care device in the presence of bacteria. J Wound Care 2015; 24:23-33. [DOI: 10.12968/jowc.2015.24.1.23] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- S.S. Park
- Diagnostics and Translational Research Center, The Henry M. Jackson Foundation for the Advancement of Military Medicine, Gaithersburg, MD, USA
| | - H. Kim
- Diagnostics and Translational Research Center, The Henry M. Jackson Foundation for the Advancement of Military Medicine, Gaithersburg, MD, USA
| | | | | | - M.J. Izadjoo
- Diagnostics and Translational Research Center, The Henry M. Jackson Foundation for the Advancement of Military Medicine, Gaithersburg, MD, USA
| |
Collapse
|
36
|
Gao J, Raghunathan VK, Reid B, Wei D, Diaz RC, Russell P, Murphy CJ, Zhao M. Biomimetic stochastic topography and electric fields synergistically enhance directional migration of corneal epithelial cells in a MMP-3-dependent manner. Acta Biomater 2015; 12:102-112. [PMID: 25311684 DOI: 10.1016/j.actbio.2014.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/02/2014] [Accepted: 10/04/2014] [Indexed: 01/14/2023]
Abstract
Directed migration of corneal epithelial cells (CECs) is critical for maintenance of corneal homeostasis as well as wound healing. Soluble cytoactive factors and the intrinsic chemical attributes of the underlying extracellular matrix (ECM) participate in stimulating and directing migration. The central importance of the intrinsic biophysical attributes of the microenvironment of the cell in modulating an array of fundamental epithelial behaviors including migration has been widely documented. Among the best measures of these attributes are the intrinsic topography and stiffness of the ECM and electric fields (EFs). How cells integrate these multiple simultaneous inputs is not well understood. Here, we present a method that combines the use of (i) topographically patterned substrates (mean pore diameter 800nm) possessing features that approximate those found in the native corneal basement membrane; and (ii) EFs (0-150mVmm(-1)) mimicking those at corneal epithelial wounds that the cells experience in vivo. We found that topographic cues and EFs synergistically regulated directional migration of human CECs and that this was associated with upregulation of matrix metalloproteinase-3 (MMP3). MMP3 expression and activity were significantly elevated with 150mVmm(-1) applied-EF while MMP2/9 remained unaltered. MMP3 expression was elevated in cells cultured on patterned surfaces against planar surfaces. The highest single-cell migration rate was observed with 150mVmm(-1) applied EF on patterned and planar surfaces. When cultured as a confluent sheet, EFs induced collective cell migration on stochastically patterned surfaces compared with dissociated single-cell migration on planar surfaces. These results suggest significant interaction of biophysical cues in regulating cell behaviors and will help define design parameters for corneal prosthetics and help to better understand corneal wound healing.
Collapse
|
37
|
Sebastian A, Iqbal SA, Colthurst J, Volk SW, Bayat A. Electrical stimulation enhances epidermal proliferation in human cutaneous wounds by modulating p53-SIVA1 interaction. J Invest Dermatol 2014; 135:1166-1174. [PMID: 25431847 DOI: 10.1038/jid.2014.502] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 10/22/2014] [Accepted: 11/12/2014] [Indexed: 12/23/2022]
Abstract
Cutaneous wounds establish endogenous "wound current" upon injury until re-epithelialization is complete. Keratinocyte proliferation, regulated partly by p53, is required for epidermal closure. SIVA1 promotes human double minute 2 homolog (HDM2)-mediated p53 regulation. However, the role of SIVA1 in wound healing is obscure. Here, we report that electrical stimulation (ES) accelerates wound healing by upregulating SIVA1 and its subsequent ability to modulate p53 activities. Cultured donut-shaped human skin explants, subjected to ES, exhibited better epidermal stratification, increased proliferation, and upregulation of gene and protein expression of HDM2/SIVA1, compared with non-ES-treated explants. ES significantly increased in vitro keratinocyte proliferation and phospho-p53-SIVA1 interaction; however, this showed stable expression of phospho-p53, which increased significantly in the absence of SIVA1. Here, HDM2 alone was unable to downregulate nuclear-accumulated phospho-p53, which was evident from decreased proliferation and increased sub-G1 population seen by flow cytometry. Further examination of the epidermis of human cutaneous wounds showed higher p53-SIVA1 coexpression and proliferation 7 days after injury in ES-treated wounds compared with control wounds. In summary, ES-inducible SIVA1 modulates p53 activities in proliferating keratinocytes, and exogenous ES affects p53/HDM2/SIVA1 axis leading to increased proliferation during re-epithelialization. This highlights ES as a potential strategy for enhancing cutaneous repair.
Collapse
Affiliation(s)
- Anil Sebastian
- Plastic and Reconstructive Surgery Research, Institute of Inflammation and Repair, Manchester Institute of Biotechnology, School of Medical and Human Sciences, University of Manchester, Manchester, UK
| | - Syed A Iqbal
- Plastic and Reconstructive Surgery Research, Institute of Inflammation and Repair, Manchester Institute of Biotechnology, School of Medical and Human Sciences, University of Manchester, Manchester, UK
| | | | - Susan W Volk
- Section of Surgery, Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania, USA
| | - Ardeshir Bayat
- Plastic and Reconstructive Surgery Research, Institute of Inflammation and Repair, Manchester Institute of Biotechnology, School of Medical and Human Sciences, University of Manchester, Manchester, UK; Centre for Dermatology, Institute of Inflammation and Repair, University of Manchester, Manchester, UK; Manchester Academic Health Science Centre, South Manchester University Hospital Foundation Trust, Wythenshawe Hospital, Manchester, UK.
| |
Collapse
|
38
|
Affiliation(s)
- Fred Chang
- Department of Microbiology and Immunology, Columbia University College of Physicians and Surgeons, New York, New York 10032;
| | - Nicolas Minc
- Institut Jacques Monod, UMR7592 CNRS, 75205 Paris cedex 13, France;
| |
Collapse
|
39
|
Kloth LC. Electrical Stimulation Technologies for Wound Healing. Adv Wound Care (New Rochelle) 2014; 3:81-90. [PMID: 24761348 PMCID: PMC3929255 DOI: 10.1089/wound.2013.0459] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 06/21/2013] [Indexed: 11/12/2022] Open
Abstract
Objective: To discuss the physiological bases for using exogenously applied electric field (EF) energy to enhance wound healing with conductive electrical stimulation (ES) devices. Approach: To describe the types of electrical currents that have been reported to enhance chronic wound-healing rate and closure. Results: Commercial ES devices that generate direct current (DC), and mono and biphasic pulsed current waveforms represent the principal ES technologies which are reported to enhance wound healing. Innovation: Wafer-thin, disposable ES technologies (wound dressings) that utilize mini or micro-batteries to deliver low-level DC for wound healing and antibacterial wound-treatment purposes are commercially available. Microfluidic wound-healing chips are currently being used with greater accuracy to investigate the EF effects on cellular electrotaxis. Conclusion: Numerous clinical trials described in subsequent sections of this issue have demonstrated that ES used adjunctively with standard wound care (SWC), enhances wound healing rate faster than SWC alone.
Collapse
Affiliation(s)
- Luther C. Kloth
- Physical Therapy Department, College of Health Sciences, Marquette University, Milwaukee, Wisconsin
| |
Collapse
|
40
|
Martin-Granados C, McCaig CD. Harnessing the Electric Spark of Life to Cure Skin Wounds. Adv Wound Care (New Rochelle) 2014; 3:127-138. [PMID: 24761353 PMCID: PMC3928811 DOI: 10.1089/wound.2013.0451] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 04/17/2013] [Indexed: 01/02/2023] Open
Abstract
Significance: Skin wounds cause great distress and are a huge economic burden, particularly with an increasingly aging population that heals poorly. There is an urgent need for better therapies that improve repair. Intracellular signaling pathways that regulate wound repair are activated by growth factors, hormones, and cytokines released at the wound. In addition, endogenous electric fields (EFs) are generated by epithelia in response to injury and are an important cue that coordinates cell behavior at wounds. Electrical stimulation (ES), therefore, holds the potential to be effective therapeutically in treating wounds. Recent Advances: ES of wounds is an old idea based on observations of the natural occurrence of EF at wound sites. However, it is now receiving increasing attention, because (1) the underpinning mechanisms are being clarified; (2) devices that measure skin wound currents are in place; and (3) medical devices that apply EF to poorly healing wounds are in clinical use with promising results. Critical Issues: Several signaling proteins transduce the EF influence to cells. However, a bigger picture of the EF-proteome is needed in order to understand this complex process and target it in a controlled manner. Future Directions: Dissecting the signaling pathways driving electrical wound healing will allow further identification of key molecular switches that control the cellular response to EFs. These findings herald the development of a new concept, the use of hydrogel electrodes impregnated with small molecules that target signaling pathways to explore the potential of dual electric-pharmacological therapies to repair wounds.
Collapse
Affiliation(s)
- Cristina Martin-Granados
- College of Life Sciences and Medicine, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Colin D. McCaig
- College of Life Sciences and Medicine, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| |
Collapse
|
41
|
Kawasaki L, Mushahwar VK, Ho C, Dukelow SP, Chan LLH, Chan KM. The mechanisms and evidence of efficacy of electrical stimulation for healing of pressure ulcer: A systematic review. Wound Repair Regen 2013; 22:161-73. [DOI: 10.1111/wrr.12134] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Accepted: 10/10/2013] [Indexed: 12/16/2022]
Affiliation(s)
- Lisa Kawasaki
- Centre for Neuroscience; University of Alberta; Edmonton Alberta Canada
- Alberta Innovates-Health Solutions Interdisciplinary Team in Smart Neural Prostheses; Edmonton Alberta Canada
| | - Vivian K. Mushahwar
- Centre for Neuroscience; University of Alberta; Edmonton Alberta Canada
- Division of Physical Medicine and Rehabilitation; University of Alberta; Edmonton Alberta Canada
- Alberta Innovates-Health Solutions Interdisciplinary Team in Smart Neural Prostheses; Edmonton Alberta Canada
| | - Chester Ho
- Division of Physical Medicine and Rehabilitation; University of Calgary; Calgary Alberta Canada
- Alberta Innovates-Health Solutions Interdisciplinary Team in Smart Neural Prostheses; Edmonton Alberta Canada
| | - Sean P. Dukelow
- Division of Physical Medicine and Rehabilitation; University of Calgary; Calgary Alberta Canada
- Alberta Innovates-Health Solutions Interdisciplinary Team in Smart Neural Prostheses; Edmonton Alberta Canada
| | - Leo L. H. Chan
- School of Medicine; University of Glasgow; Glasgow United Kingdom
| | - K. Ming Chan
- Centre for Neuroscience; University of Alberta; Edmonton Alberta Canada
- Division of Physical Medicine and Rehabilitation; University of Alberta; Edmonton Alberta Canada
- Alberta Innovates-Health Solutions Interdisciplinary Team in Smart Neural Prostheses; Edmonton Alberta Canada
| |
Collapse
|
42
|
Magnoni C, Rossi E, Fiorentini C, Baggio A, Ferrari B, Alberto G. Electrical stimulation as adjuvant treatment for chronic leg ulcers of different aetiology: an RCT. J Wound Care 2013; 22:525-6, 528-33. [DOI: 10.12968/jowc.2013.22.10.525] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C. Magnoni
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| | - E. Rossi
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| | - C. Fiorentini
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| | - A. Baggio
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| | - B. Ferrari
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| | - G. Alberto
- University of Modena and Reggio Emilia, Department of Dermatology, Modena, Italy
| |
Collapse
|
43
|
Rouabhia M, Park H, Meng S, Derbali H, Zhang Z. Electrical stimulation promotes wound healing by enhancing dermal fibroblast activity and promoting myofibroblast transdifferentiation. PLoS One 2013; 8:e71660. [PMID: 23990967 PMCID: PMC3747189 DOI: 10.1371/journal.pone.0071660] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 07/01/2013] [Indexed: 01/15/2023] Open
Abstract
Electrical stimulation (ES) has long been used as an alternative clinical treatment and an effective approach to modulate cellular behaviours. In this work we investigated the effects of ES on human skin fibroblast activity, myofibroblast transdifferentiation and the consequence on wound healing. Normal human fibroblasts were seeded on heparin-bioactivated PPy/PLLA conductive membranes, cultured for 24 h, and then exposed to ES of 50 or 200 mV/mm for 2, 4, or 6 h. Following ES, the cells were either subjected to various analyses or re-seeded to investigate their healing capacity. Our findings show that ES had no cytotoxic effect on the fibroblasts, as demonstrated by the similar LDH activity levels in the ES-exposed and non-exposed cultures, and by the comparable cell viability under both conditions. Furthermore, the number of viable fibroblasts was higher following exposure to 6 h of ES than in the non-exposed culture. This enhanced cell growth was likely due to the ES up-regulated secretion of FGF-1 and FGF-2. In an in vitro scratch-wound assay where cell monolayer was used as a healing model, the electrically stimulated dermal fibroblasts migrated faster following exposure to ES and recorded a high contractile behaviour toward the collagen gel matrix. This enhanced contraction was supported by the high level of α-smooth muscle actin expressed by the fibroblasts following exposure to ES, indicating the characteristics of myofibroblasts. Remarkably, the modulation of fibroblast growth continued long after ES. In conclusion, this work demonstrates for the first time that exposure to ES promoted skin fibroblast growth and migration, increased growth factor secretion, and promoted fibroblast to myofibroblast transdifferentiation, thus promoting wound healing.
Collapse
Affiliation(s)
- Mahmoud Rouabhia
- Faculty of Dentistry, Research Group on Oral Ecology, Laval University, Quebec City, Quebec, Canada
| | - Hyunjin Park
- Faculty of Dentistry, Research Group on Oral Ecology, Laval University, Quebec City, Quebec, Canada
- Faculty of Medicine, Department of Surgery, Laval University, Saint-François d’Assise Hospital Research Center, CHU, Quebec City, Quebec, Canada
| | - Shiyun Meng
- College of Environment and Biotechnology, Chongqing Technology and Business University, Chongqing, China
| | - Habib Derbali
- Faculty of Dentistry, Research Group on Oral Ecology, Laval University, Quebec City, Quebec, Canada
- Faculty of Medicine, Department of Surgery, Laval University, Saint-François d’Assise Hospital Research Center, CHU, Quebec City, Quebec, Canada
| | - Ze Zhang
- Faculty of Medicine, Department of Surgery, Laval University, Saint-François d’Assise Hospital Research Center, CHU, Quebec City, Quebec, Canada
| |
Collapse
|
44
|
Tsutsumi M, Goto M, Denda M. Dynamics of intracellular calcium in cultured human keratinocytes after localized cell damage. Exp Dermatol 2013; 22:367-9. [DOI: 10.1111/exd.12136] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Moe Tsutsumi
- Shiseido Research Center; Yokohama Japan
- Japan Science and Technology Agency; CREST; Tokyo Japan
| | - Makiko Goto
- Shiseido Research Center; Yokohama Japan
- Japan Science and Technology Agency; CREST; Tokyo Japan
| | - Mitsuhiro Denda
- Shiseido Research Center; Yokohama Japan
- Japan Science and Technology Agency; CREST; Tokyo Japan
| |
Collapse
|
45
|
Yang HY, Charles RP, Hummler E, Baines DL, Isseroff RR. The epithelial sodium channel mediates the directionality of galvanotaxis in human keratinocytes. J Cell Sci 2013; 126:1942-51. [PMID: 23447677 DOI: 10.1242/jcs.113225] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Cellular directional migration in an electric field (galvanotaxis) is one of the mechanisms guiding cell movement in embryogenesis and in skin epidermal repair. The epithelial sodium channel (ENaC), in addition to its function of regulating sodium transport in kidney, has recently been found to modulate cell locomotory speed. Here we tested whether ENaC has an additional function of mediating the directional migration of galvanotaxis in keratinocytes. Genetic depletion of ENaC completely blocks only galvanotaxis and does not decrease migration speed. Overexpression of ENaC is sufficient to drive galvanotaxis in otherwise unresponsive cells. Pharmacologic blockade or maintenance of the open state of ENaC also decreases or increases, respectively, galvanotaxis, suggesting that the channel open state is responsible for the response. Stable lamellipodial extensions formed at the cathodal sides of wild-type cells at the start of galvanotaxis; these were absent in the ENaC knockout keratinocytes, suggesting that ENaC mediates galvanotaxis by generating stable lamellipodia that steer cell migration. We provide evidence that ENaC is required for directional migration of keratinocytes in an electric field, supporting a role for ENaC in skin wound healing.
Collapse
Affiliation(s)
- Hsin-Ya Yang
- Department of Dermatology, University of California, Davis, CA 95616, USA
| | | | | | | | | |
Collapse
|
46
|
Li L, Gu W, Du J, Reid B, Deng X, Liu Z, Zong Z, Wang H, Yao B, Yang C, Yan J, Zeng L, Chalmers L, Zhao M, Jiang J. Electric fields guide migration of epidermal stem cells and promote skin wound healing. Wound Repair Regen 2012; 20:840-51. [PMID: 23082865 DOI: 10.1111/j.1524-475x.2012.00829.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 06/06/2012] [Indexed: 12/25/2022]
Affiliation(s)
- Li Li
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Wei Gu
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Juan Du
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Brian Reid
- Department of Dermatology and Department of Ophthalmology; Institute for Regenerative Cures; UC Davis School of Medicine; Davis; California
| | - Xianjian Deng
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Zhidai Liu
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Zhaowen Zong
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Haiyan Wang
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Bo Yao
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Ce Yang
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Jun Yan
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Ling Zeng
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| | - Laura Chalmers
- Department of Dermatology and Department of Ophthalmology; Institute for Regenerative Cures; UC Davis School of Medicine; Davis; California
| | - Min Zhao
- Department of Dermatology and Department of Ophthalmology; Institute for Regenerative Cures; UC Davis School of Medicine; Davis; California
| | - Jianxin Jiang
- State Key Laboratory of Trauma; Burns and Combined Injury; Institute of Surgery Research; Daping Hospital; Third Military Medical University; Chongqing; China
| |
Collapse
|
47
|
Hart FX, Laird M, Riding A, Pullar CE. Keratinocyte galvanotaxis in combined DC and AC electric fields supports an electromechanical transduction sensing mechanism. Bioelectromagnetics 2012; 34:85-94. [DOI: 10.1002/bem.21748] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 07/24/2012] [Indexed: 01/11/2023]
|
48
|
A role for PP1/NIPP1 in steering migration of human cancer cells. PLoS One 2012; 7:e40769. [PMID: 22815811 PMCID: PMC3397927 DOI: 10.1371/journal.pone.0040769] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 06/13/2012] [Indexed: 01/03/2023] Open
Abstract
Electrical gradients are present in many developing and regenerating tissues and around tumours. Mimicking endogenous electric fields in vitro has profound effects on the behaviour of many cell types. Intriguingly, specific cell types migrate cathodally, others anodally and some polarise with their long axis perpendicular to the electric vector. These striking phenomena are likely to have in vivo relevance since one of the determining factors during cancer metastasis is the ability to switch between attractive and repulsive migration in response to extracellular guidance stimuli. We present evidence that the cervical cancer cell line HeLa migrates cathodally in a direct current electric field of physiological intensity, while the strongly metastatic prostate cancer cell line PC-3-M migrates anodally. Notably, genetic disruption of protein serine/threonine phosphatase-1 (PP1) and its regulator NIPP1 decrease directional migration in these cell lines. Conversely, the inducible expression of NIPP1 switched the directional response of HeLa cells from cathodal to slightly anodal in a PP1-dependent manner. Remarkably, induction of a hyperactive PP1/NIPP1 holoenzyme, further shifted directional migration towards the anode. We show that PP1 association with NIPP1 upregulates signalling by the GTPase Cdc42 and demonstrate that pharmacological inhibition of Cdc42 in cells overexpressing NIPP1 recovered cathodal migration. Taken together, we provide the first evidence for regulation of directional cell migration by NIPP1. In addition, we identify PP1/NIPP1 as a novel molecular compass that controls directed cell migration via upregulation of Cdc42 signalling and suggest a way by which PP1/NIPP1 may contribute to the migratory properties of cancer cells.
Collapse
|
49
|
Ahn AC, Gow BJ, Martinsen OG, Zhao M, Grodzinsky AJ, Baikie ID. Applying the Kelvin probe to biological tissues: theoretical and computational analyses. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:061901. [PMID: 23005121 PMCID: PMC4648617 DOI: 10.1103/physreve.85.061901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Indexed: 06/01/2023]
Abstract
The Kelvin probe measures surface electrical potential without making physical contact with the specimen. It relies on capacitive coupling between an oscillating metal tip that is normal to a specimen's surface. Kelvin probes have been increasingly used to study surface and electrical properties of metals and semiconductors and are capable of detecting material surface potentials with submillivolt resolution at a micrometer spatial scale. Its capability for measuring electrical potential without being confounded by electrode-specimen contact makes extending its use towards biological materials particularly appealing. However, the theoretical basis for applying the Kelvin probe to dielectric or partially conductive materials such as biological tissue has not been evaluated and remains unclear. This study develops the theoretical basis underlying Kelvin probe measurements in five theoretical materials: highly conductive, conductive dielectric with rapid charge relaxation, conductive dielectric with slow charge relaxation, perfect dielectric, and tissue with a bulk serial resistance. These theoretically derived equations are then computationally analyzed using parameters from both theoretical specimens and actual biomaterials-including wet skin, dry skin, cerebrospinal fluid, and tendon. Based on these analyses, a Kelvin probe performs in two distinct ways depending on the charge relaxation rates of the sample: The specimen is treated either as a perfect dielectric or as highly conductive material. Because of their rapid relaxation rate and increased permittivity biomaterials behave similarly to highly conductive materials, such as metal, when evaluated by the Kelvin probe. These results indicate that the Kelvin probe can be readily applied to studying the surface potential of biological tissue.
Collapse
Affiliation(s)
- Andrew C Ahn
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 149 Thirteenth Street, Charlestown, Massachusetts 02129, USA.
| | | | | | | | | | | |
Collapse
|
50
|
Nuccitelli R, Nuccitelli P, Li C, Narsing S, Pariser DM, Lui K. The electric field near human skin wounds declines with age and provides a noninvasive indicator of wound healing. Wound Repair Regen 2012; 19:645-55. [PMID: 22092802 DOI: 10.1111/j.1524-475x.2011.00723.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Due to the transepidermal potential of 15-50 mV, inside positive, an injury current is driven out of all human skin wounds. The flow of this current generates a lateral electric field within the epidermis that is more negative at the wound edge than at regions more lateral from the wound edge. Electric fields in this region could be as large as 40 mV/mm, and electric fields of this magnitude have been shown to stimulate human keratinocyte migration toward the wounded region. After flowing out of the wound, the current returns through the space between the epidermis and stratum corneum, generating a lateral field above the epidermis in the opposite direction. Here, we report the results from the first clinical trial designed to measure this lateral electric field adjacent to human skin wounds noninvasively. Using a new instrument, the Dermacorder®, we found that the mean lateral electric field in the space between the epidermis and stratum corneum adjacent to a lancet wound in 18-25-year-olds is 107-148 mV/mm, 48% larger on average than that in 65-80-year-olds. We also conducted extensive measurements of the lateral electric field adjacent to mouse wounds as they healed and compared this field with histological sections through the wound to determine the correlation between the electric field and the rate of epithelial wound closure. Immediately after wounding, the average lateral electric field was 122 ± 9 mV/mm. When the wound is filled in with a thick, disorganized epidermal layer, the mean field falls to 79 ± 4 mV/mm. Once this epidermis forms a compact structure with only three cell layers, the mean field is 59 ± 5 mV/mm. Thus, the peak-to-peak spatial variation in surface potential is largest in fresh wounds and slowly declines as the wound closes. The rate of wound healing is slightly greater when wounds are kept moist as expected, but we could find no correlation between the amplitude of the electric field and the rate of wound healing.
Collapse
|