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Li J, Chen M, Cheng S, Gao S, Zhai J, Yu D, Wang J, Zhang J, Cai K. Sensorable zwitterionic antibacterial hydrogel for wound electrostimulation therapy. Biomaterials 2025; 315:122958. [PMID: 39547138 DOI: 10.1016/j.biomaterials.2024.122958] [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: 06/01/2024] [Revised: 10/22/2024] [Accepted: 11/08/2024] [Indexed: 11/17/2024]
Abstract
Wound healing process has always been a focal point of concern, with a plethora of hydrogel dressings available; however, their therapeutic efficacy remains a hindrance to wound closure. This article reports on a dual-network conductive system, PEDOT:PSS-co-PSBMA/XLG (PPSX) hydrogel dressing, Constructed using poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT: PSS) in combination with zwitterionic N, N-dimethyl-N-(2-methacryloyloxyethyl)-N- (3-sulfopropyl) ammonium betaine (SBMA) and nanoclay-synthesized lithium magnesium silicate (XLG). The hydrogel powder produced from it can absorb interfacial water within 30 s via physical interactions to spontaneously form hydrogels of arbitrary shapes. With a conductivity of 1.8 s/m, it can be utilized for developing flexible sensing bioelectronic devices to monitor human activities (facial expressions, blinking, swallowing, speaking, joint movements), as well as constructing electrodes for monitoring muscle movements and motorial intensity. More importantly, PPSX hydrogel effectively inhibits bacterial growth and promotes cell proliferation, thus facilitating wound healing and presenting extensive application prospects in the medical field.
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Affiliation(s)
- Jinghua Li
- The 1st Affiliated Hospital, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471000, China; Key Laboratory of Emergency and Trauma of Ministry of Education, Department of Wound Repair, The First Affiliated Hospital, College of Emergency and Trauma, Hainan Medical University, Haikou, 570100, China; Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China.
| | - Meijun Chen
- The 1st Affiliated Hospital, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471000, China
| | - Shaowen Cheng
- Key Laboratory of Emergency and Trauma of Ministry of Education, Department of Wound Repair, The First Affiliated Hospital, College of Emergency and Trauma, Hainan Medical University, Haikou, 570100, China
| | - Shegan Gao
- The 1st Affiliated Hospital, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471000, China.
| | - Jingming Zhai
- The 1st Affiliated Hospital, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, 471000, China
| | - Dongmei Yu
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China
| | - Jianping Wang
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China
| | - Jianbo Zhang
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology, Chongqing University, Chongqing, 400044, China.
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2
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Karunasagara S, Bayarkhangai B, Shim HW, Bae HJ, Lee H, Taghizadeh A, Ji Y, Mandakhbayar N, Kim HS, Hyun J, Kim TJ, Lee JH, Kim HW. Electrically-stimulated cellular and tissue events are coordinated through ion channel-mediated calcium influx and chromatin modifications across the cytosol-nucleus space. Biomaterials 2025; 314:122854. [PMID: 39405824 DOI: 10.1016/j.biomaterials.2024.122854] [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: 06/06/2024] [Revised: 09/19/2024] [Accepted: 09/26/2024] [Indexed: 11/10/2024]
Abstract
Electrical stimulation (ES) through biomaterials and devices has been implicated in activating diverse cell behaviors while facilitating tissue healing process. Despite its significance in modulating biological events, the mechanisms governing ES-activated cellular phenomena remain largely elusive. Here, we demonstrated that millisecond-pulsed temporal ES profoundly impacted a spectrum of cellular events across the membrane-cytosol-nuclear space. These include activated ion channels, intracellular calcium influx, actomyosin contractility, cell migration and proliferation, and secretome release. Such events were coordinated mainly through ES-activated ion channels and calcium oscillation dynamics. Notably, ES increased the chromatin accessibility of genes, particularly those associated with the ES-activated cellular events, underscoring the significance of epigenetic changes in ES-induced behavioral outcomes. We identified histone acetylation (mediated by histone acetyltransferases), among other chromatin modifications, is key in reshaping the chromatin landscape upon ES. These observations were further validated through experiments involving ex vivo skin tissue samples, including activated ion channels and calcium influx, increased cell proliferation and actomyosin contractility, elevated secretome profile, and more accessible chromatin structure following ES. This work provides novel insights into the mechanisms underlying ES-activated cell and tissue events, ultimately guiding design principles for the development of electrical devices and materials effective for tissue repair and wound healing.
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Affiliation(s)
- Shanika Karunasagara
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Buuvee Bayarkhangai
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hye-Won Shim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Han-Jin Bae
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hwalim Lee
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
| | - Ali Taghizadeh
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Yunseong Ji
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hye Sung Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jeongeun Hyun
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Department of Regenerative Dental Medicine, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
| | - Tae-Jin Kim
- Department of Integrated Biological Science, Pusan National University Pusan, 46241, Republic of Korea; Department of Biological Sciences, Pusan National University Pusan, 46241, Republic of Korea
| | - Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Department of Regenerative Dental Medicine, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea; UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea.
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Department of Regenerative Dental Medicine, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea; UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea.
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3
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Mo X, Meng K, Li Z, Lan S, Ren Z, Fu X, Li C, Sun T, Xie D, Zhang Z, Chen HJ. An Integrated Microcurrent Delivery System Facilitates Human Parathyroid Hormone Delivery for Enhancing Osteoanabolic Effect. SMALL METHODS 2024:e2401144. [PMID: 39420694 DOI: 10.1002/smtd.202401144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 10/08/2024] [Indexed: 10/19/2024]
Abstract
Human parathyroid hormone (1-34) (PTH) exhibits osteoanabolic and osteocatabolic effects, with shorter plasma exposure times favoring bone formation. Subcutaneous injection (SCI) is the conventional delivery route for PTH but faces low delivery efficiency due to limited passive diffusion and the obstruction of the vascular endothelial barrier, leading to prolonged drug exposure times and reduced osteoanabolic effects. In this work, a microcurrent delivery system (MDS) based on multimicrochannel microneedle arrays (MMAs) is proposed, achieving high efficiency and safety for PTH transdermal delivery. The internal microchannels of the MMAs are fabricated using high-precision 3D printing technology, providing a concentrated and safe electric field that not only accelerates the movement of PTH but also reversibly increases vascular endothelial permeability by regulating the actin cytoskeleton and interendothelial junctions through Ca2+-dependent cAMP signaling, ultimately promoting PTH absorption and shortening exposure times. The MDS enhances the osteoanabolic effect of PTH in an osteoporosis model by inhibiting osteoclast differentiation on the bone surface compared to SCI. Moreover, histopathological analysis of the skin and organs demonstrated the good safety of PTH delivered by MDS in vivo. In addition to PTH, the MDS shows broad prospects for the high-efficiency transdermal delivery of macromolecular drugs.
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Affiliation(s)
- Xiaoyi Mo
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Keyu Meng
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zehui Li
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Shanwei Lan
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Zhengda Ren
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xihong Fu
- Institute of Precision Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Chenglin Li
- State Key Laboratory of Optoelectronic Materials and Technologies Province Key Laboratory of Display Material and Technology School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Tiancheng Sun
- State Key Laboratory of Optoelectronic Materials and Technologies Province Key Laboratory of Display Material and Technology School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Denghui Xie
- Department of Orthopedic Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
| | - Zhongmin Zhang
- Division of Spine Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Hui-Jiuan Chen
- Department of Orthopedic Surgery, Center for Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, 510630, China
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4
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Wang YT, Meng XT. A review of the evidence to support electrical stimulation -induced vascularization in engineered tissue. Regen Ther 2023; 24:237-244. [PMID: 37534238 PMCID: PMC10393514 DOI: 10.1016/j.reth.2023.07.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/25/2023] [Accepted: 07/10/2023] [Indexed: 08/04/2023] Open
Abstract
Tissue engineering presents a promising solution for regenerative medicine and the success depends on the supply of oxygen/nutrients to the cells by rapid vascularization. More and more technologies are being developed to facilitate vascularization of engineered tissues. In this review, we indicated that a regulatory system which influences all angiogenesis associated cells to achieve their desired functional state is ideal for the construction of vascularized engineered tissues in vitro. We presented the evidence that electrical stimulation (ES) enhances the synergistic promotion of co-cultured angiogenesis associated cells and its potential regulatory mechanisms, highlighted the potential advantages of a combination of mesenchymal stem cells (MSCs), endothelial cells (ECs) and ES to achieve tissue vascularization, with particular emphasis on the different biological pathways of ES-regulated ECs. Finally, we proposed the future direction of using ES to reconstruct engineered tissue blood vessels, pointed out the potential advantages and disadvantages of ES application on tissue vascularization.
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Affiliation(s)
- Ying-tong Wang
- Department of Histology & Embryology, College of Basic Medical Sciences, Jilin University, Changchun, PR China
- The Undergraduate Center of Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Xiao-ting Meng
- Department of Histology & Embryology, College of Basic Medical Sciences, Jilin University, Changchun, PR China
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5
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Durán-Rey D, Brito-Pereira R, Ribeiro C, Ribeiro S, Sánchez-Margallo JA, Crisóstomo V, Irastorza I, Silván U, Lanceros-Méndez S, Sánchez-Margallo FM. Development of Silk Fibroin Scaffolds for Vascular Repair. Biomacromolecules 2023; 24:1121-1130. [PMID: 36754364 PMCID: PMC10016106 DOI: 10.1021/acs.biomac.2c01124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 01/05/2023] [Indexed: 02/10/2023]
Abstract
Silk fibroin (SF) is a biocompatible natural protein with excellent mechanical characteristics. SF-based biomaterials can be structured using a number of techniques, allowing the tuning of materials for specific biomedical applications. In this study, SF films, porous membranes, and electrospun membranes were produced using solvent-casting, salt-leaching, and electrospinning methodologies, respectively. SF-based materials were subjected to physicochemical and biological characterizations to determine their suitability for tissue regeneration applications. Mechanical analysis showed stress-strain curves of brittle materials in films and porous membranes, while electrospun membranes featured stress-strain curves typical of ductile materials. All samples showed similar chemical composition, melting transition, hydrophobic behavior, and low cytotoxicity levels, regardless of their architecture. Finally, all of the SF-based materials promote the proliferation of human umbilical vein endothelial cells (HUVECs). These findings demonstrate the different relationship between HUVEC behavior and the SF sample's topography, which can be taken advantage of for the design of vascular implants.
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Affiliation(s)
- David Durán-Rey
- Jesús
Usón Minimally Invasive Surgery Centre, Cáceres 10004, Spain
| | - Ricardo Brito-Pereira
- CMEMS-UMinho, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS-Associate
Laboratory, 4710-057 Braga/Guimarães, Portugal
- CF−UM-UP−Physics
Centre of Minho and Porto Universities and LaPMET−Laboratory
of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal
- IB-S,
Institute of Science and Innovation for Bio-Sustainability, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Clarisse Ribeiro
- CF−UM-UP−Physics
Centre of Minho and Porto Universities and LaPMET−Laboratory
of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal
| | - Sylvie Ribeiro
- CF−UM-UP−Physics
Centre of Minho and Porto Universities and LaPMET−Laboratory
of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal
| | - Juan A. Sánchez-Margallo
- Jesús
Usón Minimally Invasive Surgery Centre, Cáceres 10004, Spain
- RICORS-TERAV
Network, Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Verónica Crisóstomo
- Jesús
Usón Minimally Invasive Surgery Centre, Cáceres 10004, Spain
- Centro
de
Investigación Biomédica en Red de Enfermedades Cardiovasculares
(CIBERCV), Instituto de Salud Carlos III, Madrid 28029, Spain
- RICORS-TERAV
Network, Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Igor Irastorza
- CF−UM-UP−Physics
Centre of Minho and Porto Universities and LaPMET−Laboratory
of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal
- Cell
Biology and Histology Department, Faculty
of Medicine, Leioa 48940, Spain
| | - Unai Silván
- BCMaterials,
Basque Center for Materials, Applications
and Nanostructures, UPV/EHU
Science Park, Leioa 48940, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48009, Spain
| | - Senentxu Lanceros-Méndez
- CF−UM-UP−Physics
Centre of Minho and Porto Universities and LaPMET−Laboratory
of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal
- BCMaterials,
Basque Center for Materials, Applications
and Nanostructures, UPV/EHU
Science Park, Leioa 48940, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48009, Spain
| | - Francisco M. Sánchez-Margallo
- Jesús
Usón Minimally Invasive Surgery Centre, Cáceres 10004, Spain
- Centro
de
Investigación Biomédica en Red de Enfermedades Cardiovasculares
(CIBERCV), Instituto de Salud Carlos III, Madrid 28029, Spain
- RICORS-TERAV
Network, Instituto de Salud Carlos III, Madrid 28029, Spain
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6
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Polk T, Schmitt S, Aldrich JL, Long DS. Human dermal microvascular endothelial cell morphological response to fluid shear stress. Microvasc Res 2022; 143:104377. [PMID: 35561754 DOI: 10.1016/j.mvr.2022.104377] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/15/2022] [Accepted: 05/05/2022] [Indexed: 10/18/2022]
Abstract
As the cells that line the vasculature, endothelial cells are continually exposed to fluid shear stress by blood flow. Recent studies suggest that the morphological response of endothelial cells to fluid shear stress depends on the endothelial cell type. Thus, the present study characterizes the morphological response of human dermal microvascular endothelial cells (HMEC-1) and nuclei to steady, laminar, and unidirectional fluid shear stress. Cultured HMEC-1 monolayers were exposed to shear stress of 0.3 dyn/cm2, 16 dyn/cm2, or 32 dyn/cm2 for 72 h with hourly live-cell imaging capturing both the nuclear and cellular morphology. Despite changes in elongation and alignment occurring with increasing fluid shear stress, there was a lack of elongation and alignment over time under each fluid shear stress condition. Conversely, changes in cellular and nuclear area exhibited dependence on both time and fluid shear stress magnitude. The trends in cellular morphology differed at shear stress levels above and below 16 dyn/cm2, whereas the nuclear orientation was independent of fluid shear stress magnitude. These findings show the complex morphological response of HMEC-1 to fluid shear stress.
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Affiliation(s)
- Tabatha Polk
- Mechanobiology and Biomedicine Lab, Department of Biomedical Engineering, Wichita State University, Wichita, KS, USA
| | - Sarah Schmitt
- Mechanobiology and Biomedicine Lab, Department of Biomedical Engineering, Wichita State University, Wichita, KS, USA
| | - Jessica L Aldrich
- Mechanobiology and Biomedicine Lab, Department of Biomedical Engineering, Wichita State University, Wichita, KS, USA
| | - David S Long
- Mechanobiology and Biomedicine Lab, Department of Biomedical Engineering, Wichita State University, Wichita, KS, USA.
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7
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Heald R, Salyer S, Ham K, Wilgus TA, Subramaniam VV, Prakash S. Electroceutical treatment of infected chronic wounds in a dog and a cat. Vet Surg 2022; 51:520-527. [PMID: 34994470 DOI: 10.1111/vsu.13758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 09/27/2021] [Accepted: 12/10/2021] [Indexed: 02/04/2023]
Abstract
OBJECTIVES To describe the use of an innovative printed electroceutical dressing (PED) to treat non-healing, infected chronic wounds in one dog and one cat and report outcomes. ANIMALS A 4-year-old female spayed Mastiff and a 1-year-old female spayed domestic shorthair cat. STUDY DESIGN Short case series. METHODS Both cases had chronic wounds (duration: approximately 1 year for the dog and 6 3/4 months for the cat) that remained open and infected despite various wound management strategies. Both animals were treated with the PED. Observations from the records regarding wound size, antimicrobial susceptibility, and the time to healing were recorded. RESULTS After 10 days of PED treatment in the dog and 17 days of PED treatment in the cat, the wounds had decreased in size by approximately 4.2 times in the dog and 2.5 times in the cat. Culture of punch biopsies yielded negative results. Wounds were clinically healed at 67 days in the dog and 47 days in the cat. No further treatment of the wounds was required beyond that point. CONCLUSION Application of a PED led to closure of two chronic wounds and resolution of their persistent infection. CLINICAL SIGNIFICANCE PEDs may provide a new treatment modality to mitigate infection and promote healing of chronic wounds.
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Affiliation(s)
- Rachel Heald
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Sarah Salyer
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, Ohio, USA
| | - Kathleen Ham
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, Ohio, USA.,Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA
| | - Traci A Wilgus
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Vish V Subramaniam
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
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8
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Akbari E, Spychalski GB, Menyhert MM, Rangharajan KK, Tinapple JW, Prakash S, Song JW. Endothelial barrier function is co-regulated at vessel bifurcations by fluid forces and sphingosine-1-phosphate. BIOMATERIALS AND BIOSYSTEMS 2021; 3:100020. [PMID: 35317095 PMCID: PMC8936769 DOI: 10.1016/j.bbiosy.2021.100020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 05/12/2021] [Accepted: 05/29/2021] [Indexed: 12/31/2022] Open
Abstract
Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid mediator of endothelial barrier function. Prior studies have implicated mechanical stimulation due to intravascular laminar shear stress in co-regulating S1P signaling in endothelial cells (ECs). Yet, vascular networks in vivo consist of vessel bifurcations, and this geometry generates hemodynamic forces at the bifurcation point distinct from laminar shear stress. However, the role of these forces at vessel bifurcations in regulating S1P-dependent endothelial barrier function is not known. In this study, we implemented a microfluidic platform that recapitulates the flow dynamics of vessel bifurcations with in situ quantification of the permeability of microvessel analogues. Co-application of S1P with impinging bifurcated fluid flow, which is characterized by approximately zero shear stress and 38 dyn•cm-2 stagnation pressure at the vessel bifurcation point, promotes vessel stabilization. Similarly, co-treatment of S1P with 3 dyn•cm-2 laminar shear stress is also protective of endothelial barrier function. Moreover, it is shown that vessel stabilization due to bifurcated fluid flow and laminar shear stress is dependent on S1P receptor 1 or 2 signaling. Collectively, these findings demonstrate the endothelium-protective function of fluid forces at vessel bifurcations and their involvement in coordinating S1P-dependent regulation of vessel permeability.
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Affiliation(s)
- Ehsan Akbari
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, United States, 43210
| | - Griffin B. Spychalski
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States, 43210
| | - Miles M. Menyhert
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, United States, 43210
| | - Kaushik K. Rangharajan
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, United States, 43210
| | - Joseph W. Tinapple
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States, 43210
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, United States, 43210
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, United States, 43210
| | - Jonathan W. Song
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, United States, 43210
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, United States, 43210
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