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Kong J, Teng C, Liu F, Wang X, Zhou Y, Zong Y, Wan Z, Qin J, Yu B, Mi D, Wang Y. Enhancing regeneration and repair of long-distance peripheral nerve defect injuries with continuous microcurrent electrical nerve stimulation. Front Neurosci 2024; 18:1361590. [PMID: 38406586 PMCID: PMC10885699 DOI: 10.3389/fnins.2024.1361590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 01/29/2024] [Indexed: 02/27/2024] Open
Abstract
Introduction Peripheral nerve injuries, especially those involving long-distance deficits, pose significant challenges in clinical repair. This study explores the potential of continuous microcurrent electrical nerve stimulation (cMENS) as an adjunctive strategy to promote regeneration and repair in such cases. Methods The study initially optimized cMENS parameters and assessed its impact on Schwann cell activity, neurotrophic factor secretion, and the nerve regeneration microenvironment. Subsequently, a rat sciatic nerve defect-bridge repair model was employed to evaluate the reparative effects of cMENS as an adjuvant treatment. Functional recovery was assessed through gait analysis, motor function tests, and nerve conduction assessments. Additionally, nerve regeneration and denervated muscle atrophy were observed through histological examination. Results The study identified a 10-day regimen of 100uA microcurrent stimulation as optimal. Evaluation focused on Schwann cell activity and the microenvironment, revealing the positive impact of cMENS on maintaining denervated Schwann cell proliferation and enhancing neurotrophic factor secretion. In the rat model of sciatic nerve defect-bridge repair, cMENS demonstrated superior effects compared to control groups, promoting motor function recovery, nerve conduction, and sensory and motor neuron regeneration. Histological examinations revealed enhanced maturation of regenerated nerve fibers and reduced denervated muscle atrophy. Discussion While cMENS shows promise as an adjuvant treatment for long-distance nerve defects, future research should explore extended stimulation durations and potential synergies with tissue engineering grafts to improve outcomes. This study contributes comprehensive evidence supporting the efficacy of cMENS in enhancing peripheral nerve regeneration.
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Affiliation(s)
- Junjie Kong
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Cheng Teng
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Fenglan Liu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Xuzhaoyu Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Yi Zhou
- Department of Orthopedics, Nantong City Hospital of Traditional Chinese Medicine, Nantong, China
| | - Ying Zong
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Zixin Wan
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Jun Qin
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Bin Yu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Daguo Mi
- Department of Orthopedics, Nantong City Hospital of Traditional Chinese Medicine, Nantong, China
| | - Yaxian Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Affiliated Hospital and Medical School, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
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2
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Kim EH, Lee WS, Lee JH, Kwon DR. Microcurrent therapy as the nonpharmacological new protocol against Alzheimer's disease. Front Aging Neurosci 2024; 16:1344072. [PMID: 38304741 PMCID: PMC10833500 DOI: 10.3389/fnagi.2024.1344072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/09/2024] [Indexed: 02/03/2024] Open
Abstract
Introduction Alzheimer's disease (AD) poses an increasing global health challenge and is marked by gradual cognitive deterioration, memory impairment, and neuroinflammation. Innovative therapeutic approaches as non-pharmacological protocol are urgently needed with side effect risk of drugs. Microcurrent therapy, a non-invasive modality involving low-level electrical currents, has emerged as a potential solution to address AD's complex pathogenesis. This study investigates the optimal application of microcurrent therapy as a clinical protocol for AD, utilizing a comprehensive approach that integrates behavioral assessments and neuroinflammation evaluation in a mouse model of dementia. Methods and results The results reveal that microcurrent therapy holds promise in ameliorating memory impairment and reducing neuroinflammation in AD. Behavioral assessments, including the Novel Object Recognition Test (NOR) and Radial Arm Maze Test (RAM), demonstrated improved cognitive function following microcurrent therapy. Furthermore, microcurrent therapy inhibited expression of neuroinflammatory proteins, including ionized calcium binding adaptor molecule 1 (Iba1), and glial fibrillary acidic protein (GFAP) in current-treated group. Mechanistic insights suggest that microcurrent therapy may modulate neuroinflammation through the regulation of MAPK signaling pathways. Conclusion This study emphasizes the prospect of microcurrent therapy as a safe and efficacious non-pharmacological strategy for Alzheimer's disease (AD), providing optimism to the countless individuals impacted by this debilitating ailment. These results contribute to the developments of an innovative clinical protocol for AD and recovery from neurological injury, underscoring the significance of investigating unconventional therapeutic approaches for addressing this complex condition.
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Affiliation(s)
- Eun Ho Kim
- Department of Biochemistry, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
| | - Won Seok Lee
- Department of Biochemistry, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
| | - Jae Hee Lee
- Department of Rehabilitation Medicine, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
| | - Dong Rak Kwon
- Department of Rehabilitation Medicine, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea
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Dou Y, Zhang Y, Zhang S, Ma S, Zhang H. Multi-functional conductive hydrogels based on heparin-polydopamine complex reduced graphene oxide for epidermal sensing and chronic wound healing. J Nanobiotechnology 2023; 21:343. [PMID: 37741961 PMCID: PMC10517544 DOI: 10.1186/s12951-023-02113-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/15/2023] [Indexed: 09/25/2023] Open
Abstract
Flexible hydrogel sensors have expanded the applications of electronic devices due to their suitable mechanical properties and excellent biocompatibility. However, conventionally synthesized reduced graphene oxide (rGO) encounters limitations in reduction degree and dispersion, restricting the conductivity of graphene hydrogels and impeding the development of high-sensitivity flexible sensors. Moreover, hydrogels are susceptible to inflammation and bacterial infections, jeopardizing sensor stability over time. Thus, the challenge persists in designing conductive hydrogels that encompass high sensitivity, antibacterial efficacy, and anti-oxidative capabilities. In this study, GO was modified and reduced via a heparin-polydopamine (Hep-PDA) complex, yielding well-reduced and uniformly dispersed Hep-PDA-rGO nanosheets. Consequently, a hydrogel utilizing Hep-PDA-rGO was synthesized, showcasing commendable conductivity (3.63 S/m) and sensor performance, effectively applied in real-time motion monitoring. Notably, the hydrogel's attributes extend to facilitating chronic diabetic wound healing. It maintained a suitable inflammatory environment credited to its potent antibacterial and antioxidative properties, while its inherent conductivity promoted angiogenesis. The multifunctional nature of this hydrogel highlight its potential not only as an epidermal sensor but also as a promising dressing candidate for chronic wound treatment.
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Affiliation(s)
- Yiyong Dou
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, 510632, Guangzhou, China
| | - Yuwei Zhang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, 510632, Guangzhou, China
| | - Shuo Zhang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, 510632, Guangzhou, China
| | - Shuo Ma
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, 510632, Guangzhou, China
| | - Hong Zhang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, 510632, Guangzhou, China.
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Chen Y, Xu W, Zheng X, Huang X, Dan N, Wang M, Li Y, Li Z, Dan W, Wang Y. Two-Layered Biomimetic Flexible Self-Powered Electrical Stimulator for Promoting Wound Healing. Biomacromolecules 2023; 24:1483-1496. [PMID: 36802497 DOI: 10.1021/acs.biomac.2c01520] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The repair of wound damage has been a common problem in clinic for a long time. Inspired by the electroactive nature of tissues and the electrical stimulation of wounds in clinical practice, the next generation of wound therapy with self-powered electrical stimulator is expected to achieve the desired therapeutic effect. In this work, a two-layered self-powered electrical-stimulator-based wound dressing (SEWD) was designed through the on-demand integration of the bionic tree-like piezoelectric nanofiber and the adhesive hydrogel with biomimetic electrical activity. SEWD has good mechanical properties, adhesion properties, self-powered properties, high sensitivity, and biocompatibility. The interface between the two layers was well integrated and relatively independent. Herein, the piezoelectric nanofibers were prepared by P(VDF-TrFE) electrospinning, and the morphology of the nanofibers was controlled by adjusting the electrical conductivity of the electrospinning solution. Benefiting from its bionic dendritic structure, the prepared piezoelectric nanofibers had better mechanical properties and piezoelectric sensitivity than native P(VDF-TrFE) nanofibers, which can convert tiny forces into electrical signals as a power source for tissue repair. At the same time, the designed conductive adhesive hydrogel was inspired by the adhesive properties of natural mussels and the redox electron pairs formed by catechol and metal ions. It has bionic electrical activity matching with the tissue and can conduct the electrical signal generated by the piezoelectric effect to the wound site so as to facilitate the electrical stimulation treatment of tissue repair. In addition, in vitro and in vivo experiments demonstrated that SEWD converts mechanical energy into electricity to stimulate cell proliferation and wound healing. The proposed healing strategy for the effective treatment of skin injury was provided by developing self-powered wound dressing, which is of great significance to the rapid, safe, and effective promotion of wound healing.
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Affiliation(s)
- Yining Chen
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Wenxin Xu
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xin Zheng
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xuantao Huang
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Nianhua Dan
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Meng Wang
- Department of Orthopaedics, Strategic Support Force Medical Center, Beijing 100101, P. R. China
| | - Yuwen Li
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhengjun Li
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Weihua Dan
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, 29 Wang Jiang Road, Chengdu 610065, China
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Miller BS, Olszewski AM, Bedi A. A Microcurrent Dressing Reduces Cutibacterium Acnes Colonization in Patients Undergoing Shoulder Arthroplasty or Arthroscopy: A Prospective Case Series. HSS J 2023; 19:92-96. [PMID: 36776518 PMCID: PMC9837413 DOI: 10.1177/15563316221100989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/25/2022] [Indexed: 02/14/2023]
Abstract
Background: Cutibacterium acnes infections in the shoulder remain a significant concern in the setting of shoulder arthroplasty. Purpose: We sought to evaluate the efficacy of a microcurrent dressing in reducing C. acnes skin colonization and thereby reducing the risk of periprosthetic joint infection of the shoulder. Methods: This study was designed as a prospective case series. From October 2017 to February 2019, patients undergoing elective shoulder arthroplasty or arthroscopic shoulder surgery at a major academic medical center were offered enrollment; they signed an informed consent to participate. Patients under the age of 18, scheduled for revision shoulder arthroplasty, or with sensitivity or allergy to silver, zinc, or latex were excluded. Subjects underwent skin culture swab of the shoulder in the mid-point of the planned deltopectoral incision. The JumpStart (Arthrex; Naples, FL) microcurrent dressing was then placed over the area of the planned incision, and a full-thickness skin biopsy was harvested from the incision at the initiation of the surgical procedure. All specimens were cultured for C. acnes by the hospital's clinical microbiology laboratory with standard anaerobic technique. Results: Thirty-one subjects were enrolled in the study. Those who demonstrated no growth at baseline for the control specimen were excluded from further analysis (N = 11), given the absence of preoperative C. acnes colonization. Culture results from the 20 remaining subjects revealed significantly diminished C. acnes skin growth at the time of surgery compared to baseline. Sixty percent (12 of 20) of the subjects with positive skin swabs at baseline demonstrated no growth in the skin biopsy specimens at the time of surgery. There were no adverse events associated with the application of the microcurrent dressing. Conclusion: This prospective case series found that preoperative application of a microcurrent dressing resulted in significantly diminished C. acnes skin burden at the time of surgery in patients undergoing elective shoulder arthroplasty or arthroscopic shoulder surgery. Further study is warranted to investigate whether this preoperative intervention may contribute to a reduction in perioperative infections, including prosthetic joint infection.
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Affiliation(s)
- Bruce S. Miller
- Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
- MedSport, University of Michigan Sports Medicine Program, University of Michigan, Ann Arbor, MI, USA
| | - Adam M. Olszewski
- Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Asheesh Bedi
- Department of Orthopaedic Surgery, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA
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Physiological effects of microcurrent and its application for maximising acute responses and chronic adaptations to exercise. Eur J Appl Physiol 2023; 123:451-465. [PMID: 36399190 PMCID: PMC9941239 DOI: 10.1007/s00421-022-05097-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022]
Abstract
Microcurrent is a non-invasive and safe electrotherapy applied through a series of sub-sensory electrical currents (less than 1 mA), which are of a similar magnitude to the currents generated endogenously by the human body. This review focuses on examining the physiological mechanisms mediating the effects of microcurrent when combined with different exercise modalities (e.g. endurance and strength) in healthy physically active individuals. The reviewed literature suggests the following candidate mechanisms could be involved in enhancing the effects of exercise when combined with microcurrent: (i) increased adenosine triphosphate resynthesis, (ii) maintenance of intercellular calcium homeostasis that in turn optimises exercise-induced structural and morphological adaptations, (iii) eliciting a hormone-like effect, which increases catecholamine secretion that in turn enhances exercise-induced lipolysis and (iv) enhanced muscle protein synthesis. In healthy individuals, despite a lack of standardisation on how microcurrent is combined with exercise (e.g. whether the microcurrent is pulsed or continuous), there is evidence concerning its effects in promoting body fat reduction, skeletal muscle remodelling and growth as well as attenuating delayed-onset muscle soreness. The greatest hindrance to understanding the combined effects of microcurrent and exercise is the variability of the implemented protocols, which adds further challenges to identifying the mechanisms, optimal patterns of current(s) and methodology of application. Future studies should standardise microcurrent protocols by accurately describing the used current [e.g. intensity (μA), frequency (Hz), application time (minutes) and treatment duration (e.g. weeks)] for specific exercise outcomes, e.g. strength and power, endurance, and gaining muscle mass or reducing body fat.
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7
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Mendes C, Thirupathi A, Zaccaron RP, Corrêa MEAB, Bittencourt JVS, Casagrande LDR, de Lima ACS, de Oliveira LL, de Andrade TAM, Gu Y, Feuser PE, Machado-de-Ávila RA, Silveira PCL. Microcurrent and Gold Nanoparticles Combined with Hyaluronic Acid Accelerates Wound Healing. Antioxidants (Basel) 2022; 11:2257. [PMID: 36421443 PMCID: PMC9686715 DOI: 10.3390/antiox11112257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/03/2022] [Accepted: 11/07/2022] [Indexed: 01/30/2024] Open
Abstract
This study aimed to investigate the effects of iontophoresis and hyaluronic acid (HA) combined with a gold nanoparticle (GNP) solution in an excisional wound model. Fifty Wistar rats (n = 10/group) were randomly assigned to the following groups: excisional wound (EW); EW + MC; EW + MC + HA; EW + MC + GNPs; and EW + MC + HA + GNPs. The animals were induced to a circular excision, and treatment started 24 h after injury with microcurrents (300 µA) containing gel with HA (0.9%) and/or GNPs (30 mg/L) in the electrodes (1 mL) for 7 days. The animals were euthanized 12 h after the last treatment application. The results demonstrate a reduction in the levels of pro-inflammatory cytokines (IFNϒ, IL-1β, TNFα, and IL-6) in the group in which the therapies were combined, and they show increased levels of anti-inflammatory cytokines (IL-4 and IL-10) and growth factors (FGF and TGF-β) in the EW + MC + HA and EW + MC + HA + GNPs groups. As for the levels of dichlorofluorescein (DCF) and nitrite, as well as oxidative damage (carbonyl and sulfhydryl), they decreased in the combined therapy group when compared to the control group. Regarding antioxidant defense, there was an increase in glutathione (GSH) and a decrease in superoxide dismutase (SOD) in the combined therapy group. A histological analysis showed reduced inflammatory infiltrate in the MC-treated groups and in the combination therapy group. There was an increase in the wound contraction rate in all treated groups when compared to the control group, proving that the proposed therapies are effective in the epithelial healing process. The results of this study demonstrate that the therapies in combination favor the tissue repair process more significantly than the therapies in isolation.
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Affiliation(s)
- Carolini Mendes
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Anand Thirupathi
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China
| | - Rubya Pereira Zaccaron
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Maria Eduarda Anastácio Borges Corrêa
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - João V. S. Bittencourt
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Laura de Roch Casagrande
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Anadhelly C. S. de Lima
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Lara L. de Oliveira
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Thiago A. M. de Andrade
- Graduate Program of Biomedical Science, Herminio Ometto Foundation, Araras 13607-339, Brazil
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China
| | - Paulo Emílio Feuser
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Ricardo A. Machado-de-Ávila
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
| | - Paulo Cesar Lock Silveira
- Faculty of Sports Science, Ningbo University, Ningbo 315211, China
- Laboratory of Experimental Phisiopatology, Program of Postgraduate in Science of Health, Universidade do Extremo Sul Catarinense, Criciúma 88806-000, Brazil
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Lu C, Prahm C, Chen Y, Ehnert S, Rinderknecht H, McCaig CD, Nussler AK, Kolbenschlag J. Microcurrent Reverses Cigarette Smoke-Induced Angiogenesis Impairment in Human Keratinocytes In Vitro. Bioengineering (Basel) 2022; 9:445. [PMID: 36134990 PMCID: PMC9495747 DOI: 10.3390/bioengineering9090445] [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: 08/08/2022] [Revised: 08/30/2022] [Accepted: 08/30/2022] [Indexed: 11/23/2022] Open
Abstract
Cigarette smoking (CS) leads to several adverse health effects, including diseases, disabilities, and even death. Post-operative and trauma patients who smoke have an increased risk for complications, such as delayed bone or wound healing. In clinical trials, microcurrent (MC) has been shown to be a safe, non-invasive, and effective way to accelerate wound healing. Our study aimed to investigate if MC with the strength of 100 μA may be beneficial in treating CS-related healing impairment, especially in regard to angiogenesis. In this study, we investigated the effect of human keratinocyte cells (HaCaT) on angiogenesis after 72 h of cigarette smoke extract (CSE) exposure in the presence or absence of 100 μA MC. Cell viability and proliferation were evaluated by resazurin conversion, Sulforhodamine B, and Calcein-AM/Hoechst 33342 staining; the pro-angiogenic potential of HaCaT cells was evaluated by tube formation assay and angiogenesis array assay; signaling pathway alterations were investigated using Western blot. Constant exposure for 72 h to a 100 μA MC enhanced the angiogenic ability of HaCaT cells, which was mediated through the PI3K-Akt signaling pathway. In conclusion, the current data indicate that 100 μA MC may support wound healing in smoking patients by enhancing angiogenesis.
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Affiliation(s)
- Chao Lu
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Klinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
| | - Cosima Prahm
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Klinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
| | - Yangmengfan Chen
- Siegfried-Weller Institute for Trauma Research, BG Kinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72070 Tuebingen, Germany
| | - Sabrina Ehnert
- Siegfried-Weller Institute for Trauma Research, BG Kinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72070 Tuebingen, Germany
| | - Helen Rinderknecht
- Siegfried-Weller Institute for Trauma Research, BG Kinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72070 Tuebingen, Germany
| | - Colin D. McCaig
- Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Andreas K. Nussler
- Siegfried-Weller Institute for Trauma Research, BG Kinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72070 Tuebingen, Germany
| | - Jonas Kolbenschlag
- Department of Hand-, Plastic, Reconstructive and Burn Surgery, BG Klinik Tuebingen, University of Tuebingen, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
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Safina I, Childress LT, Myneni SR, Vang KB, Biris AS. Cell-Biomaterial Constructs for Wound Healing and Skin Regeneration. Drug Metab Rev 2022; 54:63-94. [PMID: 35129408 DOI: 10.1080/03602532.2021.2025387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Over the years, conventional skin grafts, such as full-thickness, split-thickness, and pre-sterilized grafts from human or animal sources, have been at the forefront of skin wound care. However, these conventional grafts are associated with major challenges, including supply shortage, rejection by the immune system, and disease transmission following transplantation. Due to recent progress in nanotechnology and material sciences, advanced artificial skin grafts-based on the fundamental concepts of tissue engineering-are quickly evolving for wound healing and regeneration applications, mainly because they can be uniquely tailored to meet the requirements of specific injuries. Despite tremendous progress in tissue engineering, many challenges and uncertainties still face skin grafts in vivo, such as how to effectively coordinate the interaction between engineered biomaterials and the immune system to prevent graft rejection. Furthermore, in-depth studies on skin regeneration at the molecular level are lacking; as a consequence, the development of novel biomaterial-based systems that interact with the skin at the core level has also been slow. This review will discuss 1) the biological aspects of wound healing and skin regeneration, 2) important characteristics and functions of biomaterials for skin regeneration applications, and 3) synthesis and applications of common biomaterials for skin regeneration. Finally, the current challenges and future directions of biomaterial-based skin regeneration will be addressed.
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Affiliation(s)
- Ingrid Safina
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Luke T Childress
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Srinivas R Myneni
- Department of Periodontology, Stony Brook University, Stony Brook, NY 11794 USA
| | - Kieng Bao Vang
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Alexandru S Biris
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
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Yang MY, Liu BS, Huang HY, Yang YC, Chang KB, Kuo PY, Deng YH, Tang CM, Hsieh HH, Hung HS. Engineered Pullulan-Collagen-Gold Nano Composite Improves Mesenchymal Stem Cells Neural Differentiation and Inflammatory Regulation. Cells 2021; 10:cells10123276. [PMID: 34943784 PMCID: PMC8699622 DOI: 10.3390/cells10123276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 12/15/2022] Open
Abstract
Tissue repair engineering supported by nanoparticles and stem cells has been demonstrated as being an efficient strategy for promoting the healing potential during the regeneration of damaged tissues. In the current study, we prepared various nanomaterials including pure Pul, pure Col, Pul–Col, Pul–Au, Pul–Col–Au, and Col–Au to investigate their physicochemical properties, biocompatibility, biological functions, differentiation capacities, and anti-inflammatory abilities through in vitro and in vivo assessments. The physicochemical properties were characterized by SEM, DLS assay, contact angle measurements, UV-Vis spectra, FTIR spectra, SERS, and XPS analysis. The biocompatibility results demonstrated Pul–Col–Au enhanced cell viability, promoted anti-oxidative ability for MSCs and HSFs, and inhibited monocyte and platelet activation. Pul–Col–Au also induced the lowest cell apoptosis and facilitated the MMP activities. Moreover, we evaluated the efficacy of Pul–Col–Au in the enhancement of neuronal differentiation capacities for MSCs. Our animal models elucidated better biocompatibility, as well as the promotion of endothelialization after implanting Pul–Col–Au for a period of one month. The above evidence indicates the excellent biocompatibility, enhancement of neuronal differentiation, and anti-inflammatory capacities, suggesting that the combination of pullulan, collagen, and Au nanoparticles can be potential nanocomposites for neuronal repair, as well as skin tissue regeneration in any further clinical treatments.
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Affiliation(s)
- Meng-Yin Yang
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.)
- National Defense Medical Center, Graduate Institute of Medical Sciences, Taipei 11490, Taiwan
- College of Nursing, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan
- College of Medicine, National Chung Hsing University, Taichung 40227, Taiwan
| | - Bai-Shuan Liu
- Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan; (B.-S.L.); (P.-Y.K.); (Y.-H.D.)
| | - Hsiu-Yuan Huang
- Department of Cosmeceutics and Graduate, Institute of Cosmeceutics, China Medical University, Taichung 40402, Taiwan;
| | - Yi-Chin Yang
- Department of Neurosurgery, Neurological Institute, Taichung Veterans General Hospital, Taichung 407204, Taiwan; (M.-Y.Y.); (Y.-C.Y.)
| | - Kai-Bo Chang
- Graduate Institute of Biomedical Science, China Medical University, Taichung 40402, Taiwan;
| | - Pei-Yeh Kuo
- Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan; (B.-S.L.); (P.-Y.K.); (Y.-H.D.)
| | - You-Hao Deng
- Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan; (B.-S.L.); (P.-Y.K.); (Y.-H.D.)
| | - Cheng-Ming Tang
- College of Oral Medicine, Chung Shan Medical University, Taichung 40201, Taiwan;
| | - Hsien-Hsu Hsieh
- Blood Bank, Taichung Veterans General Hospital, Taichung 407024, Taiwan;
| | - Huey-Shan Hung
- Graduate Institute of Biomedical Science, China Medical University, Taichung 40402, Taiwan;
- Translational Medicine Research, China Medical University Hospital, Taichung 40402, Taiwan
- Correspondence: ; Tel.: +886-4-22052121 (ext. 7827); Fax: +886-4-22333641
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Influence of microcurrent on the modulation of remodelling genes in a wound healing assay. Mol Biol Rep 2021; 48:1233-1241. [PMID: 33475929 DOI: 10.1007/s11033-021-06135-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 01/02/2021] [Indexed: 10/22/2022]
Abstract
The literature has shown the beneficial effects of microcurrent (MC) therapy on tissue repair. We investigated if the application of MC at 10 μA/90 s could modulate the expression of remodeling genes transforming growth factor beta (Tgfb), connective tissue growth factor (Ctgf), insulin-like growth factor 1 (Igf1), tenascin C (Tnc), Fibronectin (Fn1), Scleraxis (Scx), Fibromodulin (Fmod) and tenomodulin in NIH/3T3 fibroblasts in a wound healing assay. The cell migration was analyzed between days 0 and 4 in both fibroblasts (F) and fibroblasts + MC (F+MC) groups. On the 4th day, cell viability and gene expression were also analyzed after daily MC application. Higher expression of Ctgf and lower expression of Tnc and Fmod, respectively, were observed in the F+MC group in relation to F group (p < 0.05), and no difference was observed between the groups for the genes Tgfb, Fn1 and Scx. In cell migration, a higher number of cells in the scratch region was observed in group F+MC (p < 0.05) compared to group F on the 4th day, and the cell viability assay showed no difference between the groups. In conclusion, MC therapy at an intensity/time of 10 μA/90 s with 4 daily applications did not affect cell viability, stimulated fibroblasts migration with the involvement of Ctgf, and reduced the Tnc and Fmod expression.
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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.
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Xia J, Zhang H, Yu F, Pei Y, Luo X. Superclear, Porous Cellulose Membranes with Chitosan-Coated Nanofibers for Visualized Cutaneous Wound Healing Dressing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:24370-24379. [PMID: 32368896 DOI: 10.1021/acsami.0c05604] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Easy and rapid continuous large-scale industrial production of transparent visualized cutaneous wound healing dressing from natural polymers is very worth studying in medical natural polymer materials and multifunction gauze dressing design fields. In this work, superclear, porous cellulose membranes (CMs) with chitosan-coated nanofibers were fabricated using a simple, one-step electrostatic spinning technology and evaluated as potential wound dressings. First, the pure CMs were dissolved by a simple physical method, and then, the membranes were regenerated in an acidic coagulation bath by the casting method. The chitosan solution was polarized into nanofibers and formed a continuous fiber mat on CMs because of the charge repulsion between molecules. The prepared chitosan-coated CMs (CM-CS) were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, tensile tests, and so forth. The results indicated that CM-CS showed high wettability, hydrophilicity, and gas permeability, in addition to excellent light transmittance and mechanical compliance. Cell cytotoxicity and morphology assay and antibacterial activity against Escherichia coli and Staphylococcus aureus were also studied. They exhibited good biocompatibility and antibacterial activity of CM-CS. Moreover, evaluation of an in vivo wound healing model in mice revealed that CM-CS had a good effect in promoting wound healing. This work provided an easy and rapid continuous large-scale industrial design strategy for natural bioresource-based wound dressing materials, which could act as potential wound dressings for clinical use.
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Affiliation(s)
- Jian Xia
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No. 206, Guanggu 1st Road, Donghu New & High Technology Development Zone, Wuhan 430205 Hubei Province, PR China
| | - Hao Zhang
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No. 206, Guanggu 1st Road, Donghu New & High Technology Development Zone, Wuhan 430205 Hubei Province, PR China
| | - Faquan Yu
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No. 206, Guanggu 1st Road, Donghu New & High Technology Development Zone, Wuhan 430205 Hubei Province, PR China
| | - Ying Pei
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou City, 450001 Henan Province, PR China
| | - Xiaogang Luo
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No. 206, Guanggu 1st Road, Donghu New & High Technology Development Zone, Wuhan 430205 Hubei Province, PR China
- School of Materials Science and Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou City, 450001 Henan Province, PR China
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Fu X. Wound healing center establishment and new technology application in improving the wound healing quality in China. BURNS & TRAUMA 2020; 8:tkaa038. [PMID: 33134399 PMCID: PMC7586079 DOI: 10.1093/burnst/tkaa038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 08/28/2020] [Indexed: 04/14/2023]
Abstract
Wound healing, tissue repair and regenerative medicine are in great demand, and great achievements in these fields have been made. In recent years, many of these successes have benefitted patients, especially in the field of chronic skin wounds. However, perfect tissue repair and regeneration of damaged tissues and organs are still great challenges in the management of trauma and diseases. In this paper, the main achievements in wound healing, tissue repair and regeneration in China are reviewed and the establishment of wound healing centers and new technology application in improving wound healing quality in patients in China is highlighted.
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Yu C, Xu ZX, Hao YH, Gao YB, Yao BW, Zhang J, Wang B, Hu ZQ, Peng RY. A novel microcurrent dressing for wound healing in a rat skin defect model. Mil Med Res 2019; 6:22. [PMID: 31331385 PMCID: PMC6647105 DOI: 10.1186/s40779-019-0213-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 07/08/2019] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The exogenous application of low-intensity electric stimulation (ES) may mimic a natural endogenous bioelectric current and accelerate the repair process of skin wounds. This study designed a novel microcurrent dressing (MCD) and evaluated its potential effects on wound healing in a rat skin defect model. METHODS First, wireless ES was integrated into a medical cotton cushion to fabricate the MCD, and its electrical property was examined by using a universal power meter. Then, animal experiments were conducted to evaluate the MCD's effect. Forty-five rats were randomized into control (Con) group, Vaseline gauze (VG) group and MCD group. A full-thickness round skin incision 1.5 cm in diameter was made on the back of each animal. Apart from routine disinfection, the Con rats were untreated, whereas the other two groups were treated with VG or MCD. On days 3, 7 and 14 post injury, the wound areas were observed and measured using image analysis software following photography, and the skin samples were harvested from wound tissue. Then, histopathological morphology was observed routinely by hematoxylin and eosin (HE) staining; tumor necrosis factor α (TNF-α) and interleukin (IL)-1β expression were detected by Western blotting. Vascular endothelial growth factor (VEGF) and epidermal growth factor (EGF) expression were detected with immunohistochemistry. RESULTS The MCD generated a sf electric potential greater than 0.95 V. Animal experiments showed that the wound-healing rate in the MCD group was significantly increased compared with the Con and VG groups (P < 0.05 or P < 0.01). Histopathological observation revealed an alleviated inflammatory response, induced vascular proliferation and accelerated epithelization in the MCD group. Moreover, samples from the MCD group expressed reduced TNF-α and IL-1β levels and increased VEGF and EGF levels compared with those of the other two groups (P < 0.05 or P < 0.01). However, no significant difference was noted between the Con and VG groups at each time point. CONCLUSIONS The MCD generates a stable and lasting ES and significantly promotes wound healing by reducing inflammation duration and increasing growth factors expression. Thus, MCD may act as a promising biomaterial device for skin wound healing.
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Affiliation(s)
- Chao Yu
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Zhi-Xiu Xu
- Department of Internal Neurology, The First Affiliated Hospital/Xinxiang Medical University, Xinxiang, 453100, Henan, China
| | - Yan-Hui Hao
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Ya-Bing Gao
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Bin-Wei Yao
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Jing Zhang
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Bing Wang
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China
| | - Zong-Qian Hu
- Department of Biotechnology, Beijing Institute of Radiation Medicine, Beijing, 100850, China.
| | - Rui-Yun Peng
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, 100850, China.
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16
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Ma Z, Cui X, Lu L, Chen G, Yang Y, Hu Y, Lu Y, Cao Z, Wang Y, Wang X. Exosomes from glioma cells induce a tumor-like phenotype in mesenchymal stem cells by activating glycolysis. Stem Cell Res Ther 2019; 10:60. [PMID: 30770778 PMCID: PMC6377719 DOI: 10.1186/s13287-019-1149-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 12/23/2018] [Accepted: 01/21/2019] [Indexed: 02/08/2023] Open
Abstract
Background Exosomes are nanoscale membrane vesicles secreted by both normal and cancer cells, and cancer cell-derived exosomes play an important role in the cross-talk between cancer cells and other cellular components in the tumor microenvironment. Mesenchymal stem cells (MSCs) have tropism for tumors and have been used as tumor-tropic vectors for tumor therapy; however, the safety of such therapeutic use of MSCs is unknown. In this study, we investigated the role of glioma cell-derived exosomes in the tumor-like phenotype transformation of human bone marrow mesenchymal stem cells (hBMSCs) and explored the underlying molecular mechanisms. Methods The effect of exosomes from U251 glioma cells on the growth of hBMSCs was evaluated with the CCK-8 assay, KI67 staining, and a cell cycle distribution assessment. The migration and invasion of hBMSCs were evaluated with a Transwell assay. A proteomics and bioinformatics approach, together with Western blotting and reverse transcriptase-polymerase chain reaction, was used to investigate the effect of U251 cell-derived exosomes on the proteome of hBMSCs. Results U251 cell-derived exosomes induced a tumor-like phenotype in hBMSCs by enhancing their proliferation, migration, and invasion and altering the production of proteins involved in the regulation of the cell cycle. Moreover, U251 cell-derived exosomes promoted the production of the metastasis-related proteins MMP-2 and MMP-9, glioma marker GFAP, and CSC markers (CD133 and Nestin). The ten differentially expressed proteins identified participated in several biological processes and exhibited various molecular functions, mainly related to the inactivation of glycolysis. Western blotting showed that U251 cell-derived exosomes upregulated the levels of Glut-1, HK-2, and PKM-2, leading to the induction of glucose consumption and generation of lactate and ATP. Treatment with 2-deoxy-d-glucose significantly reversed these effects of U251 cell-derived exosomes on hBMSCs. Conclusions Our data demonstrate that glioma cell-derived exosomes activate glycolysis in hBMSCs, resulting in their tumor-like phenotype transformation. This suggests that interfering with the interaction between exosomes and hBMSCs in the tumor microenvironment has potential as a therapeutic approach for glioma. Graphical abstract ᅟ![]()
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Affiliation(s)
- Zhanjun Ma
- The Second Clinical Medical College, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Xue Cui
- The First Clinical Medical College, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Li Lu
- Institute of Pharmacology, School of Basic Medical Science, Lanzhou University, Lanzhou, 730000, Gansu, China. .,Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou, 730000, Gansu, China. .,School of Basic Medical Sciences of Lanzhou University, School of Medicine, 205 Tianshui Rd South, Lanzhou, 730000, Gansu, China.
| | - Guohu Chen
- The First Clinical Medical College, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yang Yang
- The Second Clinical Medical College, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yan Hu
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yubao Lu
- The Second Clinical Medical College, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Zhangqi Cao
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Yan Wang
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China
| | - Xuexi Wang
- School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, Gansu, China. .,Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou, 730000, Gansu, China. .,School of Basic Medical Sciences of Lanzhou University, School of Medicine, 205 Tianshui Rd South, Lanzhou, 730000, Gansu, China.
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Karmakar P, Gaitonde V. Promising Recent Strategies with Potential Clinical Translational Value to Combat Antibacterial Resistant Surge. MEDICINES (BASEL, SWITZERLAND) 2019; 6:E21. [PMID: 30709019 PMCID: PMC6473725 DOI: 10.3390/medicines6010021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/10/2019] [Accepted: 01/26/2019] [Indexed: 12/27/2022]
Abstract
Multiple drug resistance (MDR) for the treatment of bacterial infection has been a significant challenge since the beginning of the 21st century. Many of the small molecule-based antibiotic treatments have failed on numerous occasions due to a surge in MDR, which has claimed millions of lives worldwide. Small particles (SPs) consisting of metal, polymer or carbon nanoparticles (NPs) of different sizes, shapes and forms have shown considerable antibacterial effect over the past two decades. Unlike the classical small-molecule antibiotics, the small particles are less exposed so far to the bacteria to trigger a resistance mechanism, and hence have higher chances of fighting the challenge of the MDR process. Until recently, there has been limited progress of clinical treatments using NPs, despite ample reports of in vitro antibacterial efficacy. In this review, we discuss some recent and unconventional strategies that have explored the antibacterial efficacy of these small particles, alone and in combination with classical small molecules in vivo, and demonstrate possibilities that are favorable for clinical translations in near future.
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Affiliation(s)
- Partha Karmakar
- Department of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Taniguchi BA, Breda MRS, Nogueira RMB, Nai GA, Laposy CB. Fractal features of rabbit dermal wounds treated with platelet-rich plasma and topical rosuvastatin. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2018; 11:5241-5248. [PMID: 31949604 PMCID: PMC6963036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 09/27/2018] [Indexed: 06/10/2023]
Abstract
The healing process comprises a sequence of molecular and cellular events that interact to restore injured tissue. Biomaterials such as platelet-rich plasma (PRP) have been widely used to promote healing by better collagen distribution. Studies have also shown that statin-associated biomaterials may improve endothelial function and increase re-epithelialization. When assessing healing, the analysis of collagen architecture is critical. One form of evaluation used to identify structural changes in the skin is fractal dimension (FD) analysis, which facilitates the characterisation of irregular structures on histologic slides, and quantification of existing alterations by an accurate technique that is independent of the evaluator. The aim of the current study was to assess the feasibility of using rosuvastatin (RSV) alone and combined with autologous PRP to analyze collagen fibers by FD analysis. Skin lesions were experimentally induced in adult male rabbits, and were then treated with either sodium chloride solution (control), RSV gel, autologous PRP gel, or RSV gel and autologous PRP gel combined. Thirty-two biopsies of the lesions were obtained, on days 7, 14 and 17. All treatments were associated with reduced FDs at all three time-points. The FDs of the wounds that were treated with RSV and PRP combined were significantly lower on day 7 (P < 0.05), suggesting that the combination may favour the reorganisation of fibres during the initial healing process. The use of FD analysis for collagen evaluation was evidently reliable. More studies are needed, to evaluate collagen and healing associated with RSV and PRP in experimentally induced wounds.
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Affiliation(s)
- Bianca Al Taniguchi
- Postgraduate Program in Animal Science, Oeste Paulista University Presidente Prudente, São Paulo, Brazil
| | - Maria Rosa S Breda
- Postgraduate Program in Animal Science, Oeste Paulista University Presidente Prudente, São Paulo, Brazil
| | - Rosa Maria B Nogueira
- Postgraduate Program in Animal Science, Oeste Paulista University Presidente Prudente, São Paulo, Brazil
| | - Gisele A Nai
- Postgraduate Program in Animal Science, Oeste Paulista University Presidente Prudente, São Paulo, Brazil
| | - Cecília B Laposy
- Postgraduate Program in Animal Science, Oeste Paulista University Presidente Prudente, São Paulo, Brazil
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Vilkhu R, Thio WJC, Ghatak PD, Sen CK, Co AC, Kiourti A. Power Generation for Wearable Electronics: Designing Electrochemical Storage on Fabrics. IEEE ACCESS : PRACTICAL INNOVATIONS, OPEN SOLUTIONS 2018; 6:28945-28950. [PMID: 30034977 PMCID: PMC6049834 DOI: 10.1109/access.2018.2839078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a new class of textiles with electrochemical functions which, when moistened by a conductive liquid (saline solution, sweat, wound fluid, etc.), generate DC voltage and current levels capable of powering wearable electronics on the go. Contrary to previously reported power generation techniques, the proposed fabrics are fully flexible, feel and behave like regular clothing, do not include any rigid components, and provide DC power via moistening by readily available liquids. Our approach entails printed battery cells that are composed of silver and zinc electrodes deposited onto a polyester fabric to generate power in the microwatt range. Electrochemical characterization of the discharge of a single printed battery cell in a 10 M NaOH electrolyte shows reproducible results with a sustained power level of ∼80 μW for over 3 hours. Scalable DC power may also be achieved by connecting multiple battery cells in series via flexible and conductive E-threads. Indeed, a series connection of two battery cells is demonstrated to boost the generated voltage from 1.4 V to 2.5 V. Notably, this in-series printed battery arrangement is shown to successfully power a digital thermometer under both 10 M NaOH, a 0.5 M NaCl solution (mimicking human sweat), and Dulbecco's Phosphate-Buffered Saline solution (DPBS) (mimicking bodily fluid electrolytes). Overall, the proposed technology is expected to be of utmost significance for healthcare, sports, military, and consumer applications, among others.
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Affiliation(s)
- Ramandeep Vilkhu
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
| | - Wesley Joo-Chen Thio
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
| | - Piya Das Ghatak
- Department of Surgery, The Ohio State University, Columbus, OH 43210 USA
| | - Chandan K. Sen
- Department of Surgery, The Ohio State University, Columbus, OH 43210 USA
| | - Anne C. Co
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210 USA
| | - Asimina Kiourti
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
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Shen XR, Chen XL, Xie HX, He Y, Chen W, Luo Q, Yuan WH, Tang X, Hou DY, Jiang DW, Wang QR. Beneficial effects of a novel shark-skin collagen dressing for the promotion of seawater immersion wound healing. Mil Med Res 2017; 4:33. [PMID: 29502521 PMCID: PMC5658943 DOI: 10.1186/s40779-017-0143-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/12/2017] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Wounded personnel who work at sea often encounter a plethora of difficulties. The most important of these difficulties is seawater immersion. Common medical dressings have little effect when the affected area is immersed in seawater, and only rarely dressings have been reported for the treatment of seawater-immersed wounds. The objective of this study is to develop a new dressing which should be suitable to prevent the wound from seawater immersion and to promote the wound healing. METHODS Shark skin collagen (SSC) was purified via ethanol de-sugaring and de-pigmentation and adjusted for pH. A shark skin collagen sponge (SSCS) was prepared by freeze-drying. SSCS was attached to an anti-seawater immersion polyurethane (PU) film (SSCS + PU) to compose a new dressing. The biochemical properties of SSC and physicochemical properties of SSCS were assessed by standard methods. The effects of SSCS and SSCS + PU on the healing of seawater-immersed wounds were studied using a seawater immersion rat model. For the detection of SSCS effects on seawater-immersed wounds, 12 SD rats, with four wounds created in each rat, were divided into four groups: the 3rd day group, 5th day group, 7th day group and 12th day group. In each group, six wounds were treated with SSCS, three wounds treated with chitosan served as the positive control, and three wounds treated with gauze served as the negative control. For the detection of the SSCS + PU effects on seawater-immersed wounds, 36 SD rats were divided into three groups: the gauze (GZ) + PU group, chitosan (CS) + PU group and SSCS + PU group, with 12 rats in each group, and two wounds in each rat. The wound sizes were measured to calculate the healing rate, and histomorphology and the immunohistochemistry of the CD31 and TGF-β expression levels in the wounded tissues were measured by standard methods. RESULTS The results of Ultraviolet-visible (UV-vis) spectrum, Fourier-transform infrared (FTIR) spectrum, circular dichroism (CD) spectra, sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), and amino acid composition analyses of SSC demonstrated that SSC is type I collagen. SSCS had a homogeneous porous structure of approximately 200 μm, porosity rate of 83.57% ± 2.64%, water vapor transmission ratio (WVTR) of 4500 g/m2, tensile strength of 1.79 ± 0.41 N/mm, and elongation at break of 4.52% ± 0.01%. SSCS had significant beneficial effects on seawater-immersed wound healing. On the 3rd day, the healing rates in the GZ negative control, CS positive control and SSCS rats were 13.94% ± 5.50%, 29.40% ± 1.10% and 47.24% ± 8.40%, respectively. SSCS also enhanced TGF-β and CD31 expression in the initial stage of the healing period. The SSCS + PU dressing effectively protected wounds from seawater immersion for at least 4 h, and accelerated re-epithelialization, vascularization and granulation formation of seawater-immersed wounds in the earlier stages of wound healing, and as well as significantly promoted wound healing. The SSCS + PU dressing also enhanced expression of TGF-β and CD31. The effects of SSCS and SSCS + PU were superior to those of both the chitosan and gauze dressings. CONCLUSIONS SSCS has significant positive effects on the promotion of seawater-immersed wound healing, and a SSCS + PU dressing effectively prevents seawater immersion, and significantly promotes seawater-immersed wound healing.
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Affiliation(s)
- Xian-Rong Shen
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China. .,College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China.
| | - Xiu-Li Chen
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China.,College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Hai-Xia Xie
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China.,Research Center of TCM Processing Technology, Zhejiang Chinese Medical University, Hang Zhou, 311401, China
| | - Ying He
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
| | - Wei Chen
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
| | - Qun Luo
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
| | - Wei-Hong Yuan
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China.,College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Xue Tang
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China.,College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China
| | - Deng-Yong Hou
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
| | - Ding-Wen Jiang
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
| | - Qing-Rong Wang
- The PLA Key Laboratory of Biological Effect and Medical Protection on Naval Vessel Special Environment, Naval Medical Research Institute, Shanghai, 200433, China
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Wang L, Hu C, Shao L. The antimicrobial activity of nanoparticles: present situation and prospects for the future. Int J Nanomedicine 2017; 12:1227-1249. [PMID: 28243086 PMCID: PMC5317269 DOI: 10.2147/ijn.s121956] [Citation(s) in RCA: 1594] [Impact Index Per Article: 227.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Nanoparticles (NPs) are increasingly used to target bacteria as an alternative to antibiotics. Nanotechnology may be particularly advantageous in treating bacterial infections. Examples include the utilization of NPs in antibacterial coatings for implantable devices and medicinal materials to prevent infection and promote wound healing, in antibiotic delivery systems to treat disease, in bacterial detection systems to generate microbial diagnostics, and in antibacterial vaccines to control bacterial infections. The antibacterial mechanisms of NPs are poorly understood, but the currently accepted mechanisms include oxidative stress induction, metal ion release, and non-oxidative mechanisms. The multiple simultaneous mechanisms of action against microbes would require multiple simultaneous gene mutations in the same bacterial cell for antibacterial resistance to develop; therefore, it is difficult for bacterial cells to become resistant to NPs. In this review, we discuss the antibacterial mechanisms of NPs against bacteria and the factors that are involved. The limitations of current research are also discussed.
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Affiliation(s)
- Linlin Wang
- Department of Stomatology, Hainan General Hospital, Haikou, Hainan
| | - Chen Hu
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
| | - Longquan Shao
- Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, People’s Republic of China
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