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Wound healing by electricity

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https://www.readbyqxmd.com/read/28181477/eumelanin-releasing-spongy-like-hydrogels-for-skin-re-epithelialization-purposes
#1
Lucília Pereira da Silva, Sílvia Oliveira, Rogério Pirraco, Tírcia Santos, Rui Reis, Alexandra Marques, Vitor Correlo
Melanin function in the skin has been associated to pigmentation but other properties such as electrical conductance, photoprotection, antioxidant and antimicrobial activity, have also been recognized. Nonetheless, the use of melanin in a skin wound healing context was never considered. In this sense, eumelanin particles with a typical round and nano-sized morphology and electrical conductivity of 2.09x10-8S·cm-1 were extracted from the ink of Sepia officinalis. The ability of primary human keratinocytes to phagocyte eumelanin, which was then accumulated in cytosolic vesicles and nuclei surroundings, was demonstrated...
February 9, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28163378/low-temperature-plasma-equipment-applied-on-surgical-hemostasis-and-wound-healings
#2
REVIEW
Kenji Miyamoto, Sanae Ikehara, Hajime Sakakita, Yuzuru Ikehara
Low temperature plasma (LTP) coagulation equipment, which avoids causing burn injuries to patients, has been introducing into minimally invasive surgery. The mechanism by which this equipment stops bleeding is to directly occupy the injury with the formed blood clots, and different from the mechanism of the common electrical hemostatic devices that cauterize the tissues around the bleeding to stem the blood flow. A noteworthy point is that LTP treatment with our equipment is not confined only to the blood coagulation system, but it has significant effects on the other blood components to form clots with or without hemolysis, and that there is a plasma current threshold that determines whether the treatment makes stable clots...
January 2017: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/28152010/comparison-of-corneal-epitheliotrophic-capacities-among-human-platelet-lysates-and-other-blood-derivatives
#3
Chien-Jung Huang, Yi-Chen Sun, Karen Christopher, Amy Shih-I Pai, Chia-Ju Lu, Fung-Rong Hu, Szu-Yuan Lin, Wei-Li Chen
PURPOSE: To evaluate the corneal epitheliotropic abilities of two commercialized human platelet lysates (HPLs) and to compare the results with other blood derivatives, including human peripheral serum (HPS) and bovine fetal serum (FBS). METHODS: In vitro, human corneal epithelial cells were incubated in various concentrations (0%, 3%, 5% and 10%) of blood derivatives. Two commercialized HPLs, including UltraGRO TM (Helios, Atlanta, GA) and PLTMax (Mill Creek, Rochester, MI), were tested and compared with HPS and FBS...
2017: PloS One
https://www.readbyqxmd.com/read/28078187/bioelectric-field-enhancement-the-influence-on-membrane-potential-and-cell-migration-in-vitro
#4
Marcy C Purnell, Terence J Skrinjar
Objective: The extracellular matrix consists of critical components that affect fibroblast polarization and migration. The existence of both intrinsic and extrinsic electrical signals that play essential roles in the development, physiology, regeneration, and pathology of cells was discovered over a century ago. In this study, we study how the Bioelectric Field Enhancement (BEFE) device and its generated electromagnetic field (EMF) by continuous direct current (DC) significantly affect the membrane potential and cell migration of fibroblasts in vitro...
December 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/28041753/modified-reversed-superficial-peroneal-artery-flap-in-the-reconstruction-of-ankle-and-foot-defects-following-severe-burns-or-trauma
#5
Shi-Ji Li, Hao Cheng, Xu Fang, Jian-Yang Xu, Fei Wang, Sheng Liu, Xu-Lin Chen, Xiong-Wen Lv
OBJECTIVE: Challenges persist in the reconstruction of the ankle and the foot with exposed tendons, joints, and bones as a result of severe burns and trauma. In flap elevation involving the sensitive superficial nerve, the local nerve was always sacrificed to obtain an anesthetic donor site; however, such a procedure introduced the possibility of painful neuromas. In this study, we present a desired clinical application of a modified reversed superficial peroneal artery flap, in which the superficial peroneal nerve is preserved...
December 29, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28006672/gene-electrotransfer-into-skin-using-noninvasive-multi-electrode-array-for-vaccination-and-wound-healing
#6
Spela Kos, Kevin Vanvarenberg, Tanja Dolinsek, Maja Cemazar, Jure Jelenc, Véronique Préat, Gregor Sersa, Gaëlle Vandermeulen
Skin is an attractive target for gene electrotransfer due to its easy accessibility and its interesting immune properties. Since electrodes are often invasive and frequently induce discomfort during pulse application, there is a fundamental need for non-invasive electrodes for skin delivery. We developed circular pin non-invasive multi-electrode array (MEA), suitable for different clinical applications. MEA was first employed to deliver a luciferase reporter gene. Then, it was used to deliver a DNA vaccine coding for ovalbumin or a plasmid encoding hCAP-18/LL-37 for promoting wound healing...
April 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/27999549/the-role-of-connexins-in-wound-healing-and-repair-novel-therapeutic-approaches
#7
REVIEW
Pui Wong, Teresa Tan, Catherine Chan, Victoria Laxton, Yin Wah Fiona Chan, Tong Liu, Wing Tak Wong, Gary Tse
Gap junctions are intercellular proteins responsible for mediating both electrical and biochemical coupling through the exchange of ions, second messengers and small metabolites. They consist of two connexons, with (one) connexon supplied by each cell. A connexon is a hexamer of connexins and currently more than 20 connexin isoforms have been described in the literature thus far. Connexins have a short half-life, and therefore gap junction remodeling constantly occurs with a high turnover rate. Post-translational modification, such as phosphorylation, can modify their channel activities...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27976527/skin-regeneration-with-all-accessory-organs-following-ablation-with-irreversible-electroporation
#8
Alexander Golberg, Martin Villiger, G Felix Broelsch, Kyle P Quinn, Hassan Albadawi, Saiqa Khan, Michael T Watkins, Irene Georgakoudi, William G Austen, Marianna Bei, Brett E Bouma, Martin C Mihm, Martin L Yarmush
Skin scar formation is a complex process that results in the formation of dense extracellular matrix without normal skin appendages such as hair and glands. The absence of a scarless healing model in adult mammals prevents the development of successful therapies. We show that irreversible electroporation of skin drives its regeneration with all accessory organs in normal adult rats. Pulsed electric fields at 500 V, with 70 µs pulse duration, and 1000 pulses delivered at 3 Hz, applied through two electrodes separated by 2 mm lead to massive cell death...
December 14, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27974006/safety-and-effectiveness-of-therapeutic-magnetic-resonance-in-diabetic-foot-ulcers-a-prospective-randomised-controlled-trial
#9
RANDOMIZED CONTROLLED TRIAL
A Piaggesi, M Sambataro, C Nicoletti, C Goretti, E Lacopi, A Coppelli
OBJECTIVE: To test the efficacy and safety of therapeutic magnetic resonance (TMR) in the management of diabetic foot ulcers (DFU), the authors designed a prospective randomised controlled trial in three highly specialised diabetic foot clinics. METHOD: All the patients consecutively visited in a period of 18 months were screened according to the inclusion (presence of an ulcer >1 cm(2) in the foot lasting at least 6 weeks; ABPI>0.6; consent to participate in the study) and exclusion (Charcot's foot; local or systemic infections; chronic renal failure; any wearable electrically-driven life-supporting device) criteria...
December 2, 2016: Journal of Wound Care
https://www.readbyqxmd.com/read/27919618/electric-field-induced-suppression-of-pten-drives-epithelial-to-mesenchymal-transition-via-mtorc1-activation
#10
Tiantian Yan, Xupin Jiang, Xiaowei Guo, Wen Chen, Di Tang, Junhui Zhang, Xingyue Zhang, Dongxia Zhang, Qiong Zhang, Jiezhi Jia, Yuesheng Huang
BACKGROUND: Naturally occurring electric fields (EFs) are an intrinsic property of wounds. Endogenous EFs in skin wounds play critical roles in the dynamic and well-ordered biological process of wound healing. The epithelial-to-mesenchymal transition (EMT) allows keratinocytes to transition from sedentary cells to motile cells, facilitating wound healing. However, EMT-related studies have been performed without considering endogenous EFs. Thus, the relationship between electrical signals and the EMT remain elusive...
February 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/27856290/enhanced-neurogenic-biomarker-expression-and-reinnervation-in-human%C3%A2-acute-skin-wounds-treated-by-electrical-stimulation
#11
Anil Sebastian, Susan W Volk, Poonam Halai, James Colthurst, Ralf Paus, Ardeshir Bayat
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...
March 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/27792001/angiogenic-potential-of-endothelial-and-tumor-cells-seeded-on-gelatin-based-hydrogels-in-response-to-electrical-stimulations
#12
Rumiana Tzoneva, Veselina Uzunova, Sonia Apostolova, Anne Krüger-Genge, Axel T Neffe, Friedrich Jung, Andreas Lendlein
Angiogenesis is one of the key processes during development, wound healing and tumor formation. Prerequisite for its existence is the presence of endogenous electrical fields (EFs) generated by active ion transport across polarized epithelia and endothelia, and appearance of the transcellular potentials. During angiogenesis cellular factor as endothelial growth factor (VEGF), synthesis of adhesive proteins and membrane metalloproteinases (MMPs) govern the angiogenic response to different external stimuli as biomaterials interactions and/or exogenous EF...
2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27756010/electrotonic-potentials-in-aloe-vera-l-effects-of-intercellular-and-external-electrodes-arrangement
#13
Alexander G Volkov, Eunice K Nyasani, Clayton Tuckett, Jessenia M Scott, Mariah M Z Jackson, Esther A Greeman, Ariane S Greenidge, Devin O Cohen, Maia I Volkova, Yuri B Shtessel
Electrostimulation of plants can induce plant movements, activation of ion channels, ion transport, gene expression, enzymatic systems activation, electrical signaling, plant-cell damage, enhanced wound healing, and influence plant growth. Here we found that electrical networks in plant tissues have electrical differentiators. The amplitude of electrical responses decreases along a leaf and increases by decreasing the distance between polarizing Pt-electrodes. Intercellular Ag/AgCl electrodes inserted in a leaf and extracellular Ag/AgCl electrodes attached to the leaf surface were used to detect the electrotonic potential propagation along a leaf of Aloe vera...
February 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/27709618/the-wound-healing-trajectory-and-predictors-with-combined-electric-stimulation-and-conventional-care-one-outpatient-wound-care-clinic-s-experience
#14
Kehua Zhou, Ronald Schenk, Michael S Brogan
BACKGROUND: Electric stimulation (E-stim) has been found to be an effective treatment in improving wound healing rates. However, the wound healing trajectory and its related predictors for complete wound closure (CWC) have not been reported with E-stim treatment. MATERIALS AND METHODS: This was a retrospective study. Data on 159 patients treated at an outpatient wound clinic utilizing combined intervention of E-stim and conventional care were included. The Kaplan-Meier healing curve together with linear regression models depicted the percentage of patients with CWC against time...
December 2016: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27612747/effects-of-polydeoxyribonucleotides-pdrn-on-wound-healing-electric-cell-substrate-impedance-sensing-ecis
#15
Youngmi Koo, Yeoheung Yun
Polydeoxyribonucleotides (PDRN) have been explored as an effective treatment for tissue repair in peripheral artery occlusive disease, diabetic foot ulcers, and eye lotion. We report on the effect of polydeoxyribonucleotides (PDRN) on wound healing by using the electric cell-substrate impedance sensing (ECIS) system and viability testing. Human osteoblasts (U2OS) and primary human dermal fibroblasts (HDF) were used to study the effect of PDRN on migration and proliferation. ECIS allowed the creation of a wound by applying high current, and then monitoring the healing process by measuring impedance in real time...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27576070/the-efficacy-of-electrical-stimulation-in-lower-extremity-cutaneous-wound-healing-a-systematic-review
#16
REVIEW
Mohammed Ashrafi, Teresa Alonso-Rasgado, Mohamed Baguneid, Ardeshir Bayat
Current gold standard lower extremity cutaneous wound management is not always effective. Cutaneous wounds generate a "current of injury" which is directly involved in wound healing processes. Application of exogenous electrical stimulation has been hypothesised to imitate the natural electric current that occurs in cutaneous wounds. The aim of this extensive review is to provide a detailed update on the variety of electrical stimulation modalities used in the management of lower extremity wounds. Several different waveforms and delivery methods of electrical stimulation have been used...
August 30, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27574782/electrotransfer-parameters-as-a-tool-for-controlled-and-targeted-gene-expression-in-skin
#17
Spela Kos, Tanja Blagus, Maja Cemazar, Ursa Lampreht Tratar, Monika Stimac, Lara Prosen, Tanja Dolinsek, Urska Kamensek, Simona Kranjc, Lars Steinstraesser, Gaëlle Vandermeulen, Véronique Préat, Gregor Sersa
Skin is an attractive target for gene electrotransfer. It consists of different cell types that can be transfected, leading to various responses to gene electrotransfer. We demonstrate that these responses could be controlled by selecting the appropriate electrotransfer parameters. Specifically, the application of low or high electric pulses, applied by multi-electrode array, provided the possibility to control the depth of the transfection in the skin, the duration and the level of gene expression, as well as the local or systemic distribution of the transgene...
2016: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/27569413/second-degree-burns-with-six-etiologies-treated-with-autologous-noncultured-cell-spray-grafting
#18
Roger Esteban-Vives, Myung S Choi, Matthew T Young, Patrick Over, Jenny Ziembicki, Alain Corcos, Jörg C Gerlach
Partial and deep partial-thickness burn wounds present a difficult diagnosis and prognosis that makes the planning for a conservative treatment versus mesh grafting problematic. A non-invasive treatment strategy avoiding mesh grafting is often chosen by practitioners based on their clinical and empirical evidence. However, a delayed re-epithelialization after conservative treatment may extend the patient's hospitalization period, increase the risk of infection, and lead to poor functional and aesthetic outcome...
November 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27556780/advanced-technologies-to-improve-wound-healing-electrical-stimulation-vibration-therapy-and-ultrasound-what-is-the-evidence
#19
William J Ennis, Claudia Lee, Karen Gellada, Thomas F Corbiere, Timothy J Koh
BACKGROUND: Cellular energy is required for the healing cascade to occur. A combination of cells, cytokines, chemokines, tissue perfusion, an extracellular matrix, and local forces are also required to allow for human tissue repair to proceed. Although there are many examples of treatment options, energy-based therapies are the least understood, appreciated, and employed by practicing wound care physicians. The recent growth of tissue engineering has encouraged researchers to employ both electrical stimulation and therapeutic ultrasound (US) to stimulate cells, induce migration, and modify tissue constructs...
September 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27556645/modification-of-pulsed-electric-field-conditions-results-in-distinct-activation-profiles-of-platelet-rich-plasma
#20
Andrew L Frelinger, Anja J Gerrits, Allen L Garner, Andrew S Torres, Antonio Caiafa, Christine A Morton, Michelle A Berny-Lang, Sabrina L Carmichael, V Bogdan Neculaes, Alan D Michelson
BACKGROUND: Activated autologous platelet-rich plasma (PRP) used in therapeutic wound healing applications is poorly characterized and standardized. Using pulsed electric fields (PEF) to activate platelets may reduce variability and eliminate complications associated with the use of bovine thrombin. We previously reported that exposing PRP to sub-microsecond duration, high electric field (SMHEF) pulses generates a greater number of platelet-derived microparticles, increased expression of prothrombotic platelet surfaces, and differential release of growth factors compared to thrombin...
2016: PloS One
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