101
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Gavel PK, Kumar N, Parmar HS, Das AK. Evaluation of a Peptide-Based Coassembled Nanofibrous and Thixotropic Hydrogel for Dermal Wound Healing. ACS APPLIED BIO MATERIALS 2020; 3:3326-3336. [DOI: 10.1021/acsabm.0c00252] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pramod K. Gavel
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
| | - Narendra Kumar
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
| | | | - Apurba K. Das
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India
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102
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Comparative Study of Histological Change After Local Treatments with Zinc Oxide, Infrared Rays, Ultraviolet Rays, and Cold Plasma in Rat Model of Diabetic Foot. Indian J Surg 2020. [DOI: 10.1007/s12262-020-02143-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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103
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de Aquino PEA, de Souza TDFG, Santos FA, Viana AFSC, Louchard BO, Leal LKAM, Rocha TM, Evangelista JSAM, de Aquino NC, de Alencar NMN, Silveira EDR, Viana GSDB. The Wound Healing Property of N-Methyl-(2 S,4 R)- trans-4-Hydroxy-L-Proline from Sideroxylon obtusifolium is Related to its Anti-Inflammatory and Antioxidant Actions. J Evid Based Integr Med 2020; 24:2515690X19865166. [PMID: 31394920 PMCID: PMC6689925 DOI: 10.1177/2515690x19865166] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Wound healing involves the interaction of blood cells, proteins, proteases, growth factors, and extracellular matrix components. Inflammation is one of the first events occurring during this process. Previously, we showed that the N-Methyl-(2S,4R)-trans-4-Hydroxy-L-Proline (NMP) from Sideroxylon obtusifolium leaves (a Brazilian medicinal species) presents an anti-inflammatory action. Considering inflammation as an important event in the wound healing process, the objectives were to investigate the topical effects of the NMP gel on a mice wound-induced model. Male Swiss mice were divided into 4 groups: Sham (surgical procedure only), Control (gel-base treated), and 3% or 10% NMP gel-treated groups. Measurements of wound areas and microscopic analyses (HE [hematoxylin-eosin] and PSR [picrosirius red] stainings) were carried out, at the 7th and 12th, days after the wound induction. Furthermore, immunohistochemical assays for iNOS (inducible nitric oxide synthase) and COX-2 (cyclooxygenase-2) and biochemical measurements for TBARS (thiobarbituric acid reactive substances), GSH (glutathione), and myeloperoxidase (MPO) were also performed, at the second day after the wound induction. The work showed that NMP decreases the wound areas, after topical application, relatively to the Sham and Control groups. In addition, microscopic alterations were reduced and collagen deposition was increased, at the 7th and 12th days, in the 10% NMP group. While iNOS and COX-2 immunostainings and GSH contents increased, in relation to the Sham and Control groups, TBARS and MPO decreased. Altogether, the results showed NMP to improve the wound healing process, by upregulating iNOS and COX-2 activities, reducing lipid peroxidation and MPO activity, and increasing GSH contents. In addition, NMP certainly contributes to the increased collagen deposition. These data may stimulate translational studies dealing with the possible use of NMP from Sideroxylon obtusifolium or from other sources for the management of wound healing.
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104
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Zhou L, Li X, Wang K, Shen F, Zhang L, Li P, Shang T, Wang J, Huang N. Cu ∥-loaded polydopamine coatings with in situ nitric oxide generation function for improved hemocompatibility. Regen Biomater 2020; 7:153-160. [PMID: 32296534 PMCID: PMC7147359 DOI: 10.1093/rb/rbz043] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/25/2019] [Accepted: 11/08/2019] [Indexed: 02/01/2023] Open
Abstract
NO is the earliest discovered gas signal molecule which is produced by normal healthy endothelial cells, and it has many functions, such as maintaining cardiovascular homeostasis, regulating vasodilation, inhibiting intimal hyperplasia and preventing atherosclerosis in the blood system. Insufficient NO release is often observed in the pathological environment, for instance atherosclerosis. It was discovered that NO could be released from the human endogenous NO donor by many compounds, and these methods can be used for the treatment of certain diseases in the blood system. In this work, a series of copper-loaded polydopamine (PDA) coatings were produced through self-polymerization time for 24, 48 and 72 h. The chemical composition and structure, coating thickness and hydrophilicity of the different copper-loaded PDA coatings surfaces were characterized by phenol hydroxyl quantitative, X-ray photoelectron spectroscopy, ellipsometry atomic force microscopy and water contact angles. The results indicate that the thickness and the surface phenolic hydroxyl density of the PDA coatings increased with the polymerization time.This copper-loaded coating has glutathione peroxidase-like activity, and it has the capability of catalyzing NO releasing from GSNO. The surface of the coating showed desirable hemocompatibility, the adhesion and activation of platelets were inhibited on the copper-loaded coatings. At the same time, the formation of the thrombosis was also suppressed. These copper-loaded PDA coatings could provide a promising platform for the development of blood contact materials.
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Affiliation(s)
- Lei Zhou
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Xin Li
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Kebing Wang
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Fangyu Shen
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Lu Zhang
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Peichuang Li
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Tengda Shang
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Jin Wang
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
| | - Nan Huang
- Key Laboratories of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
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105
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Letsiou S, Félix RC, Cardoso JCR, Anjos L, Mestre AL, Gomes HL, Power DM. Cartilage acidic protein 1 promotes increased cell viability, cell proliferation and energy metabolism in primary human dermal fibroblasts. Biochimie 2020; 171-172:72-78. [PMID: 32084494 DOI: 10.1016/j.biochi.2020.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 02/15/2020] [Indexed: 02/08/2023]
Abstract
Cartilage acidic protein 1 (CRTAC1) is an extracellular matrix protein of human chondrogenic tissue that is also present in other vertebrates, non-vertebrate eukaryotes and in some prokaryotes. The function of CRTAC1 remains unknown but the protein's structure indicates a role in cell-cell or cell-matrix interactions and calcium-binding. The aim of the present study was to evaluate the in vitro effects of hCRTAC1-A on normal human dermal fibroblasts (NHDF). A battery of in vitro assays (biochemical and PCR), immunofluorescence and a biosensor approach were used to characterize the protein's biological activities on NHDF cells in a scratch assay. Gene expression analysis revealed that hCRTAC1-A protein is associated with altered levels of expression for genes involved in the processes of cell proliferation (CXCL12 and NOS2), cell migration (AQP3 and TNC), and extracellular matrix-ECM regeneration and remodeling (FMOD, TIMP1, FN1) indicating a role for hCRTAC1-A in promoting these activities in a scratch assay. In parallel, the candidate processes identified by differential gene transcription were substantiated and extended using Electric cell-substrate impedance sensing (ECIS) technology, immunofluorescence and cell viability assays. Our findings indicate that hCRTAC1-A stimulated cell proliferation, migration and ECM production in primary human fibroblasts in vitro.
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Affiliation(s)
- Sophia Letsiou
- Laboratory of Biochemistry, Scientific Affairs, APIVITA SA, Industrial Park of Markopoulo Mesogaias, 19003, Markopoulo Attikis, Athens, Greece.
| | - Rute C Félix
- Comparative Endocrinology and Integrative Biology Group (CEIB), Centro de Ciências Do Mar (CCMAR), Universidade Do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - João C R Cardoso
- Comparative Endocrinology and Integrative Biology Group (CEIB), Centro de Ciências Do Mar (CCMAR), Universidade Do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Liliana Anjos
- Comparative Endocrinology and Integrative Biology Group (CEIB), Centro de Ciências Do Mar (CCMAR), Universidade Do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal
| | - Ana L Mestre
- Universidade Do Algarve, Faculdade de Ciências e Tecnologia, 8005-139, Faro, Portugal; Instituto de Telecomunicações, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Henrique L Gomes
- Universidade Do Algarve, Faculdade de Ciências e Tecnologia, 8005-139, Faro, Portugal; Instituto de Telecomunicações, Avenida Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Deborah M Power
- Comparative Endocrinology and Integrative Biology Group (CEIB), Centro de Ciências Do Mar (CCMAR), Universidade Do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal; Universidade Do Algarve, Faculdade de Ciências e Tecnologia, 8005-139, Faro, Portugal.
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106
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Nie X, Zhang H, Shi X, Zhao J, Chen Y, Wu F, Yang J, Li X. Asiaticoside nitric oxide gel accelerates diabetic cutaneous ulcers healing by activating Wnt/β-catenin signaling pathway. Int Immunopharmacol 2019; 79:106109. [PMID: 31865242 DOI: 10.1016/j.intimp.2019.106109] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 11/25/2019] [Accepted: 11/29/2019] [Indexed: 12/23/2022]
Abstract
Diabetic ulcers, gangrene, local infections and other traumatic symptoms of wound healing are all directly related. Promoting the early healing of diabetic cutaneous ulcers (DCU) and reducing the disability and treatment costs is an important research project integrating traditional Chinese and Western medicine. Nitric oxide (NO) is a key component of wound healing, and endogenous NO secretion is insufficient during the development of DCU. It has been reported that exogenous NO can promote wound healing, but exogenous NO has a short half-life and is difficult to adhere to the skin. Asiaticoside (AC) is extracted from the traditional Chinese medicine Centella asiatica, and has angiogenic, anticancer, antioxidant, anti-inflammatory, and wound-healing effects. Therefore, our study is based on the hypothesis that the combination of AC and NO to treat DCU is possible. In this study we considered gels of AC and NO, and evaluated the effects of the gel on DCU healing. Based on our study, it was found that the combined effect of asiaticoside and NO could accelerate the healing rate of DCU wounds. The asiaticoside NO gel can inhibit the growth of bacteria in the wound surface, alleviate the inflammatory reaction of wound, and increase the expression of VEGF, iNOS, eNOS and CD34. Our research shows that asiaticoside NO gel may promote DCU wound healing by regulating Wnt/β-Catenin signaling pathway. It will provide new targets and strategies for the diagnosis and treatment of DCU.
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Affiliation(s)
- Xuqiang Nie
- Institute of Materia Medica, College of Pharmacy, Army Medical University (Third Military Medical University), Chongqing 400038, China; College of Pharmacy, Zunyi Medical University, Zunyi 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China.
| | - Han Zhang
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Xiujun Shi
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Jiufeng Zhao
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Yu Chen
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Faming Wu
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Jianwen Yang
- Pharmacy Department, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, China
| | - Xiaohui Li
- Institute of Materia Medica, College of Pharmacy, Army Medical University (Third Military Medical University), Chongqing 400038, China.
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107
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Chandran B, Janakiraman K. New Disposable Nitric Oxide Sensor Fabrication Using GaN Nanowires. ACS OMEGA 2019; 4:17171-17176. [PMID: 31656890 PMCID: PMC6811847 DOI: 10.1021/acsomega.9b01609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 09/20/2019] [Indexed: 06/10/2023]
Abstract
Gallium nitride (GaN) nanowires anchored on the surface of cost-effective pencil graphite electrodes (PGEs) have been developed as a new disposable nitric oxide (NO) sensor through a hydrothermal method followed by annealing treatment. The as-obtained nanomaterials were examined by field emission scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and EIS. Concurrently, the electrocatalytic performance has been analyzed using cyclic voltammetry and amperometric measurements. The experimental results exhibit good electrochemical sensing performance toward the generated NO in NO2 - with a wide linear detection range of 1.0 μM to 1.0 mM with a correlation coefficient of 0.999 and a detection limit of 0.180 μM. In addition, the GaN nanowire-modified PGE surface showed high selectivity for the detection of NO as compared to other relevant biomolecules. This confirms that the PGE/GaN nanowire is a new promising electrochemical sensor for the sensitive detection of NO.
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108
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Lee J, Hlaing SP, Cao J, Hasan N, Ahn HJ, Song KW, Yoo JW. In Situ Hydrogel-Forming/Nitric Oxide-Releasing Wound Dressing for Enhanced Antibacterial Activity and Healing in Mice with Infected Wounds. Pharmaceutics 2019; 11:pharmaceutics11100496. [PMID: 31569746 PMCID: PMC6836051 DOI: 10.3390/pharmaceutics11100496] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/24/2019] [Accepted: 09/25/2019] [Indexed: 12/29/2022] Open
Abstract
The eradication of bacteria from wound sites and promotion of healing are essential for treating infected wounds. Nitric oxide (NO) is desirable for these purposes due to its ability to accelerate wound healing and its broad-spectrum antibacterial effects. We developed an in situ hydrogel-forming/NO-releasing powder dressing (NO/GP), which is a powder during storage and forms a hydrogel when applied to wounds, as a novel NO-releasing formulation to treat infected wounds. An NO/GP fine powder (51.5 μm) was fabricated by blending and micronizing S-nitrosoglutathione (GSNO), alginate, pectin, and polyethylene glycol (PEG). NO/GP remained stable for more than four months when stored at 4 or 37 °C. When applied to wounds, NO/GP absorbed wound fluid and immediately converted to a hydrogel. Additionally, wound fluid triggered a NO release from NO/GP for more than 18 h. The rheological properties of hydrogel-transformed NO/GP indicated that NO/GP possesses similar adhesive properties to marketed products (Vaseline). NO/GP resulted in a 6-log reduction in colony forming units (CFUs) of methicillin resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa, which are representative drug-resistant gram-positive and -negative bacteria, respectively. The promotion of wound healing by NO/GP was demonstrated in mice with full-thickness wounds challenged with MRSA and P. aeruginosa. Thus, NO/GP is a promising formulation for the treatment of infected wounds.
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Affiliation(s)
- Juho Lee
- College of Pharmacy, Pusan National University, Busan 46241, Korea.
| | - Shwe Phyu Hlaing
- College of Pharmacy, Pusan National University, Busan 46241, Korea.
| | - Jiafu Cao
- College of Pharmacy, Pusan National University, Busan 46241, Korea.
| | - Nurhasni Hasan
- College of Pharmacy, Pusan National University, Busan 46241, Korea.
| | - Hye-Jin Ahn
- Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea.
| | - Ki-Won Song
- Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea.
| | - Jin-Wook Yoo
- College of Pharmacy, Pusan National University, Busan 46241, Korea.
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109
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Brown MD, Schoenfisch MH. Electrochemical Nitric Oxide Sensors: Principles of Design and Characterization. Chem Rev 2019; 119:11551-11575. [DOI: 10.1021/acs.chemrev.8b00797] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Micah D. Brown
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, North Carolina 27599, United States
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, North Carolina 27599, United States
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110
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Dalisson B, Barralet J. Bioinorganics and Wound Healing. Adv Healthc Mater 2019; 8:e1900764. [PMID: 31402608 DOI: 10.1002/adhm.201900764] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/19/2019] [Indexed: 12/18/2022]
Abstract
Wound dressings and the healing enhancement (increasing healing speed and quality) are two components of wound care that lead to a proper healing. Wound care today consists mostly of providing an optimal environment by removing waste and necrotic tissues from a wound, preventing infections, and keeping the wounds adequately moist. This is however often not enough to re-establish the healing process in chronic wounds; with the local disruption of vascularization, the local environment is lacking oxygen, nutrients, and has a modified ionic and molecular concentration which limits the healing process. This disruption may affect cellular ionic pumps, energy production, chemotaxis, etc., and will affect the healing process. Biomaterials for wound healing range from simple absorbents to sophisticated bioactive delivery vehicles. Often placing a material in or on a wound can change multiple parameters such as pH, ionic concentration, and osmolarity, and it can be challenging to pinpoint key mechanism of action. This article reviews the literature of several inorganic ions and molecules and their potential effects on the different wound healing phases and their use in new wound dressings.
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Affiliation(s)
| | - Jake Barralet
- Faculty of DentistryMcGill University Montreal H3A 1G1 QC Canada
- Division of OrthopaedicsDepartment of SurgeryFaculty of MedicineMcGill University Montreal H4A 0A9 QC Canada
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111
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Krzystek-Korpacka M, Wiśniewski J, Fleszar MG, Bednarz-Misa I, Bronowicka-Szydełko A, Gacka M, Masłowski L, Kędzior K, Witkiewicz W, Gamian A. Metabolites of the Nitric Oxide (NO) Pathway Are Altered and Indicative of Reduced NO and Arginine Bioavailability in Patients with Cardiometabolic Diseases Complicated with Chronic Wounds of Lower Extremities: Targeted Metabolomics Approach (LC-MS/MS). OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5965721. [PMID: 31396302 PMCID: PMC6664544 DOI: 10.1155/2019/5965721] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 06/26/2019] [Indexed: 01/05/2023]
Abstract
OBJECTIVE The status of metabolites of the nitric oxide (NO) pathway in patients with chronic wounds in the course of cardiometabolic diseases is largely unknown. Yet arginine supplementation and citrulline supplementation as novel therapeutic modalities aimed at increasing NO are tested. MATERIAL AND METHODS Targeted metabolomics approach (LC-MS/MS) was applied to determine the concentrations of L-arginine, L-citrulline, asymmetric and symmetric dimethylarginines (ADMA and SDMA), and arginine/ADMA and arginine/SDMA ratios as surrogate markers of NO and arginine availability in ulnar and femoral veins, representing systemic and local levels of metabolites, in patients with chronic wounds in the course of cardiometabolic diseases (n = 59) as compared to patients without chronic wounds but with similar cardiometabolic burden (n = 55) and healthy individuals (n = 88). RESULTS Patients with chronic wounds had significantly lower systemic L-citrulline and higher ADMA and SDMA concentrations and lower L-arginine/ADMA and L-arginine/SDMA as compared to healthy controls. The presence of chronic wounds in patients with cardiometabolic diseases was associated with decreased L-arginine but with increased L-citrulline, ADMA, and SDMA concentrations and decreased L-arginine/ADMA and L-arginine/SDMA. Serum obtained from the ulnar and femoral veins of patients with chronic wounds differed by L-arginine concentrations and L-arginine/SDMA ratio, both lower in the femoral vein. Wound etiology affected L-citrulline and SDMA concentrations, lower and higher, respectively, in patients with venous stasis, and the L-arginine/SDMA ratio-lower in venous stasis. The wound type affected L-arginine/ADMA and citrulline-lower in patients with ulcerations or gangrene. IL-6 was an independent predictor of L-arginine/ADMA, VEGF-A of ADMA, G-CSF of L-arginine/SDMA, and GM-CSF of L-citrulline and SDMA. CONCLUSION Chronic wounds in the course of cardiometabolic diseases are associated with reduced NO and arginine availability due to ADMA and SDMA accumulation rather than arginine deficiency, not supporting its supplementation. Wound character seems to affect NO bioavailability and wound etiology-arginine bioavailability. Arginine concentration and its availability are more markedly reduced at the local level than the systemic level.
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Affiliation(s)
| | - Jerzy Wiśniewski
- Department of Medical Biochemistry, Wroclaw Medical University, Wroclaw 50-368, Poland
| | - Mariusz G. Fleszar
- Department of Medical Biochemistry, Wroclaw Medical University, Wroclaw 50-368, Poland
- PORT Polski Ośrodek Rozwoju Technologii sp, ZOO, Wroclaw 54-066, Poland
| | - Iwona Bednarz-Misa
- Department of Medical Biochemistry, Wroclaw Medical University, Wroclaw 50-368, Poland
| | | | - Małgorzata Gacka
- Department of Angiology, Hypertension and Diabetes, Wroclaw Medical University, Wroclaw 50-556, Poland
| | - Leszek Masłowski
- Department of Angiology, Regional Specialist Hospital, Wroclaw 51-124, Poland
| | - Krzysztof Kędzior
- Department of Medical Biochemistry, Wroclaw Medical University, Wroclaw 50-368, Poland
| | - Wojciech Witkiewicz
- Department of Vascular Surgery, Regional Specialist Hospital, Wroclaw 51-124, Poland
- Research and Development Centre, Regional Specialist Hospital, Wroclaw 51-124, Poland
| | - Andrzej Gamian
- Department of Medical Biochemistry, Wroclaw Medical University, Wroclaw 50-368, Poland
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112
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Kramer A, Conway BR, Meissner K, Scholz F, Rauch BH, Moroder A, Ehlers A, Meixner AJ, Heidecke CD, Partecke LI, Kietzmann M, Assadian O. Cold atmospheric pressure plasma for treatment of chronic wounds: drug or medical device? J Wound Care 2019; 26:470-475. [PMID: 28795892 DOI: 10.12968/jowc.2017.26.8.470] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The use of cold atmospheric pressure plasma (CAPP) as a new therapeutic option to aid the healing of chronic wounds appears promising. Currently, uncertainty exists regarding their classification as medical device or medical drug. Because the classification of CAPP has medical, legal, and economic consequences as well as implications for the level of preclinical and clinical testing, the correct classification is not an academic exercise, but an ethical need. METHOD A multidisciplinary team of physicians, surgeons, pharmacists, physicists and lawyers has analysed the physical and technical characteristics as well as legal conditions of the biological action of CAPP. RESULTS It was concluded that the mode of action of the locally generated CAPP, with its main active components being different radicals, is pharmacological and not physical in nature. CONCLUSION Depending on the intended use, CAPP should be classified as a drug, which is generated by use of a medical device directly at the point of therapeutic application.
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Affiliation(s)
- A Kramer
- Consultant Clinical Microbiology and Infection Control, Institute of Hygiene and Environmental Medicine, University Medicine Greifswald, Germany
| | - B R Conway
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, United Kingdom; Institute of Skin Integrity and Infection Prevention, School for Human and Health Sciences, University of Huddersfield
| | - K Meissner
- Anesthetist, Intensive Care Specialist, Department of Anesthesiology and Intensive Medicine, University Medicine, Greifswald, Germany
| | - F Scholz
- Biochemist, Institute of Biochemistry, University of Greifswald, Germany
| | - B H Rauch
- Medical Pharmacology and Toxicology, Department of Pharmacology, Center of Drug Absorption and Transport, University Medicine Greifswald, Germany
| | - A Moroder
- Lawyer, Ehlers, Ehlers & Partner Healthcare Law Firm Munich, Germany
| | - A Ehlers
- Lawyer, Ehlers, Ehlers & Partner Healthcare Law Firm Munich, Germany
| | - A J Meixner
- Physicist, Institute of Physical and Theoretical Chemistry Tübingen, Germany
| | - C-D Heidecke
- General Surgeon, Department of Surgery, University Medicine Greifswald, Germany
| | - L I Partecke
- General Surgeon, Department of Surgery, University Medicine Greifswald, Germany
| | - M Kietzmann
- Veterinary Medicine, Pharmacologist, Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - O Assadian
- Consultant Clinical Microbiology and Infection Control, Consultant Infectious Diseases and Tropical Medicine, Institute for Hospital Epidemiology and Infection Control, Medical University of Vienna, Vienna, Austria
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113
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Abd El-Aleem SA, Abdelwahab S, Am-Sherief H, Sayed A. Cellular and physiological upregulation of inducible nitric oxide synthase, arginase, and inducible cyclooxygenase in wound healing. J Cell Physiol 2019; 234:23618-23632. [PMID: 31161614 DOI: 10.1002/jcp.28930] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/16/2022]
Abstract
Wound repair is regulated by overlapping cellular, physiological and biochemical events. Prostaglandins and nitric oxide have been a focus for inflammation research particularly since the discovery of their inducible isoforms nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2). Study of the cellular expression of iNOS and COX-2 and arginase which competes with iNOS for its substrate, in an in vivo model of wound healing could reveal important roles for these enzymes in the physiological progression of wound repair. Adult male rats received full thickness dermal wounds which were harvested at different times. Protein levels and activities of the enzymes were assessed by western blot and biochemical assays respectively. The cellular distribution and the colocalization were assessed by immunostaining. The protein levels and activities of iNOS, arginase, and COX-2 increased only during the inflammatory phase of wound. Immunocytochemistry showed that the three enzymes were coexpressed and the main cellular source was inflammatory cells mainly macrophages. iNOS was induced at the wound site and was the earliest to increase significantly (p < 0.05) for only up to 3 days postwounding. However, arginase and COX-2 significant ( p < 0.05) upregulation started at a later time points and continued for up to 14 days postwounding. Therefore iNOS, compared with arginase and COX-2, showed a temporal difference in expression during wound healing which could be explained by their products being required at different stages of the healing process. The coordinated expression of the three enzymes at different time points could account for the physiological progression of the healing process.
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Affiliation(s)
- Seham A Abd El-Aleem
- Cell Biology, School of Biological Sciences, University of Manchester, Manchester, UK.,Histology and Cell Biology, Minia University, Minia, Egypt
| | - Soha Abdelwahab
- Histology and Cell Biology, Minia University, Minia, Egypt.,Histology, Deraya University, New Minia, Egypt
| | - Hany Am-Sherief
- Pharmaceutical Chemistry, College of Pharmacy, Jouf University, Jouf, Sakaka, Saudi Arabia.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Nahda University, Beni-suef, Egypt
| | - Ahmed Sayed
- Histology and Cell Biology, Minia University, Minia, Egypt
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114
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Veith AP, Henderson K, Spencer A, Sligar AD, Baker AB. Therapeutic strategies for enhancing angiogenesis in wound healing. Adv Drug Deliv Rev 2019; 146:97-125. [PMID: 30267742 DOI: 10.1016/j.addr.2018.09.010] [Citation(s) in RCA: 419] [Impact Index Per Article: 83.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 09/15/2018] [Accepted: 09/24/2018] [Indexed: 12/19/2022]
Abstract
The enhancement of wound healing has been a goal of medical practitioners for thousands of years. The development of chronic, non-healing wounds is a persistent medical problem that drives patient morbidity and increases healthcare costs. A key aspect of many non-healing wounds is the reduced presence of vessel growth through the process of angiogenesis. This review surveys the creation of new treatments for healing cutaneous wounds through therapeutic angiogenesis. In particular, we discuss the challenges and advancement that have been made in delivering biologic, pharmaceutical and cell-based therapies as enhancers of wound vascularity and healing.
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115
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Hasan N, Cao J, Lee J, Naeem M, Hlaing SP, Kim J, Jung Y, Lee BL, Yoo JW. PEI/NONOates-doped PLGA nanoparticles for eradicating methicillin-resistant Staphylococcus aureus biofilm in diabetic wounds via binding to the biofilm matrix. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109741. [PMID: 31349480 DOI: 10.1016/j.msec.2019.109741] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 05/09/2019] [Accepted: 05/11/2019] [Indexed: 01/23/2023]
Abstract
Wounds infected with methicillin-resistant Staphylococcus aureus (MRSA) biofilm represent a high risk in patients with diabetes. Nitric oxide (NO) has shown promise in dispersing biofilm and wound healing. For an effective treatment of MRSA biofilm-infected wounds, however, NO needs to be supplied to the biofilm matrix in a sustainable manner due to a short half-life and limited diffusion distance of NO. In this study, polyethylenimine/diazeniumdiolate (PEI/NONOate)-doped PLGA nanoparticles (PLGA-PEI/NO NPs) with an ability to bind to the biofilm matrix are developed to facilitate the NO delivery to MRSA biofilm-infected wound. In simulated wound fluid, PLGA-PEI/NO NPs show an extended NO release over 4 days. PLGA-PEI/NO NPs firmly bind to the MRSA biofilm matrix, resulting in a greatly enhanced anti-biofilm activity. Moreover, PLGA-PEI/NO NPs accelerate healing of MRSA biofilm-infected wounds in diabetic mice along with complete biofilm dispersal and reduced bacterial burden. These results suggest that the biofilm-binding NO-releasing NPs represent a promising NO delivery system for the treatments of biofilm-infected chronic wounds.
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Affiliation(s)
- Nurhasni Hasan
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jiafu Cao
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Juho Lee
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Muhammad Naeem
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Shwe Phyu Hlaing
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jihyun Kim
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea; Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, South Korea
| | - Yunjin Jung
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Bok-Leul Lee
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jin-Wook Yoo
- Department of Manufacturing Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, South Korea.
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116
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Su CH, Li WP, Tsao LC, Wang LC, Hsu YP, Wang WJ, Liao MC, Lee CL, Yeh CS. Enhancing Microcirculation on Multitriggering Manner Facilitates Angiogenesis and Collagen Deposition on Wound Healing by Photoreleased NO from Hemin-Derivatized Colloids. ACS NANO 2019; 13:4290-4301. [PMID: 30883107 DOI: 10.1021/acsnano.8b09417] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A deficiency of nitric oxide (NO) supply has been found to impair wound healing. The exogenous topical delivery of NO is a promising approach to enhance vasodilation and stimulate angiogenesis and collagen deposition. In this study, the CN groups on the surface of Prussian blue (PB) nanocubes were carefully reduced to -CH2-NH2 to conjugate with COOH group of hemin consisting of a Fe-porphyrin structure with strong affinity toward NO. Accordingly, the NO gas was able to coordinate to hemin-modified PB nanocubes. The hemin-modified PB carrying NO (PB-NO) can be responsible to near-infrared (NIR) light (808 nm) exposure to induce the thermo-induced liberation of NO based on the light-to-heat transformation property of PB nanocubes. The NO supply on the incisional wound sites can be readily topically dropped the colloidal solution of PB-NO for receiving NIR light irradiation. The enhanced blood flow was in a controllable manner whenever the wound sites containing PB-NO received NIR light irradiation. The promotion of blood perfusion following the on-demand multidelivery of NO has effectively facilitated the process of wound closure to enhance angiogensis and collagen deposition.
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Affiliation(s)
- Chia-Hao Su
- Institute for Translational Research in Biomedicine , Kaohsiung Chang Gung Memorial Hospital , Kaohsiung 833 , Taiwan
| | | | | | | | | | | | - Min-Chiao Liao
- Institute for Translational Research in Biomedicine , Kaohsiung Chang Gung Memorial Hospital , Kaohsiung 833 , Taiwan
| | - Chin-Lai Lee
- Institute for Translational Research in Biomedicine , Kaohsiung Chang Gung Memorial Hospital , Kaohsiung 833 , Taiwan
| | - Chen-Sheng Yeh
- Department of Medicinal and Applied Chemistry , Kaohsiung Medical University , Kaohsiung 807 , Taiwan
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117
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Kulshrestha S, Chawla R, Alam MT, Adhikari J, Basu M. Efficacy and dermal toxicity analysis of Sildenafil citrate based topical hydrogel formulation against traumatic wounds. Biomed Pharmacother 2019; 112:108571. [DOI: 10.1016/j.biopha.2019.01.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 12/20/2018] [Accepted: 01/08/2019] [Indexed: 10/27/2022] Open
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118
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Sahana TG, Rekha PD. A bioactive exopolysaccharide from marine bacteria Alteromonas sp. PRIM-28 and its role in cell proliferation and wound healing in vitro. Int J Biol Macromol 2019; 131:10-18. [PMID: 30851325 DOI: 10.1016/j.ijbiomac.2019.03.048] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/06/2019] [Accepted: 03/06/2019] [Indexed: 02/07/2023]
Abstract
Marine bacteria secrete exopolysaccharides (EPS) with unique structural and functional properties and serve as a source of newer bioactive biopolymers. This study reports an EPS produced by a marine bacterium identified as Alteromonas sp. PRIM-28 for its bioactivities. The EPS was characterised using standard methods and tested for its bioactivities using in vitro models. EPS-A28 is an anionic heteropolysaccharide with a molecular weight of 780 kDa and exists as triple helical structure in aqueous solution. Monosaccharide composition is mannuronic acid, glucose and N-acetyl glucosamine repeating units in the ratio 1:3.67:0.93. The FT-IR spectra showed the presence of sulphate, phosphate and uronic acid residues. The thermal analysis showed partial degradation of the EPS-A28 at 190 °C and 40% of residues were stable up to 800 °C. It showed biocompatibility and induced proliferation and migration of dermal fibroblasts (HDF) and keratinocytes. EPS-A28 could increase the S-phase of cell cycle. The proliferative property of the EPS-A28 was established by the increased expression of fibroblast proliferation marker (Ki-67) also its capability of binding to cell surface. It also induced nitric oxide and arginase synthesis in macrophages. These findings suggest that EPS-A28 can be potentially used as a multifunctional bioactive polymer in wound care.
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Affiliation(s)
- T G Sahana
- Yenepoya Research Centre, Yenepoya University, University Road, Deralakatte, Mangalore, India.
| | - P D Rekha
- Yenepoya Research Centre, Yenepoya University, University Road, Deralakatte, Mangalore, India.
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119
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Lee HY, Lee HJ, Kim GC, Choi JH, Hong JW. Plasma cupping induces VEGF expression in skin cells through nitric oxide-mediated activation of hypoxia inducible factor 1. Sci Rep 2019; 9:3821. [PMID: 30846730 PMCID: PMC6405951 DOI: 10.1038/s41598-019-40086-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 01/31/2019] [Indexed: 12/23/2022] Open
Abstract
Despite a long history, the clinical efficacy of cupping therapy is still under debate. This is likely due to the lack of direct evidence for the biological actions of cupping, since the short exposure of cells to vacuum condition rarely has affects cellular activity. In this study, the medicinal properties of a recent medical technology, non-thermal plasma, were added to classical cupping and designated as 'plasma cupping' (PC). In our results, the plasma-generating efficacy was increased under a cupping-like semi-vacuum condition (410 Torr) rather than normal atmospheric pressure (760 Torr). Notably, while cupping rarely affects the angiogenic factor vascular-endothelial growth factor (VEGF)-A, the PC treatment on HaCaT human keratinocytes significantly induced the expression of VEGF-A. The increased expression of the VEGF-A gene after the PC treatment was expected to be a result of PC-mediated ERK protein activation. The PC-mediated activation of ERK was essential for the activity of hypoxia inducible factor (HIF) 1 alpha, which is responsible for the PC-mediated expression of VEGF-A. The PC mediated increase of NO in the media was thought as a main reason for the elevated HIF-1 protein activity. In addition to the angiogenesis-promoting action of PC, it also showed anti-inflammatory activity by reducing TNF-α-mediated IL-1β and IL-6 expression. Taken together, this study indicates the potential for PC that could enhance the clinical efficacy of cupping by adding the effects of non-thermal plasma to traditional cupping.
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Affiliation(s)
- Hyun-Young Lee
- Department of electrical engineering, Pusan National University, Busan, South Korea
| | - Hae-June Lee
- Department of electrical engineering, Pusan National University, Busan, South Korea
| | - Gyoo-Cheon Kim
- Department of Anatomy and Cell Biology, School of Dentistry, Pusan National University, Yangsan, South Korea
| | - Jeong-Hae Choi
- Department of Anatomy and Cell Biology, School of Dentistry, Pusan National University, Yangsan, South Korea.
- Department of Internal Medicine, School of Korean Medicine, Pusan National University, Yangsan, South Korea.
| | - Jin-Woo Hong
- Department of Internal Medicine, School of Korean Medicine, Pusan National University, Yangsan, South Korea.
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120
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Premarathna AD, Ranahewa T, Wijesekera S, Wijesundara R, Jayasooriya AP, Wijewardana V, Rajapakse R. Wound healing properties of aqueous extracts of Sargassum illicifolium: An in vitro assay. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.wndm.2018.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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121
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Wound healing properties, antimicrobial and antioxidant activities of Salvia kronenburgii Rech. f. and Salvia euphratica Montbret, Aucher & Rech. f. var. euphratica on excision and incision wound models in diabetic rats. Biomed Pharmacother 2019; 111:1260-1276. [DOI: 10.1016/j.biopha.2019.01.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/05/2019] [Accepted: 01/09/2019] [Indexed: 01/27/2023] Open
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122
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Park K, Jeong H, Tanum J, Yoo JC, Hong J. Poly-l-lysine/poly-l-glutamic acid-based layer-by-layer self-assembled multilayer film for nitric oxide gas delivery. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.09.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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123
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Janićijević Ž, Ninkov M, Kataranovski M, Radovanović F. Poly(DL-Lactide-co-ε-Caprolactone)/Poly(Acrylic Acid) Composite Implant for Controlled Delivery of Cationic Drugs. Macromol Biosci 2018; 19:e1800322. [PMID: 30548776 DOI: 10.1002/mabi.201800322] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 11/02/2018] [Indexed: 11/09/2022]
Abstract
Poly(DL-lactide-co-ε-caprolactone)/poly(acrylic acid) implantable composite reservoirs for cationic drugs are synthesized by sequentially applying photoirradiation and liquid phase inversion. The chemical composition and microstructure of reservoirs are characterized with Fourier transform infrared spectroscopy-attenuated total reflection (FTIR-ATR) and scanning electron microscopy (SEM), respectively. Drug loading and release properties are investigated using methylene blue as the drug model. Biocompatibility of reservoirs is examined through a series of in vitro tests and an in vivo experiment of subcutaneous implantation in Dark Agouti rats. Reservoirs show good ion-exchange capacity, high water content, and fast reversible swelling with retained geometry. Results of drug loading and release reveal excellent loading efficiency and diffusion-controlled release during 2 weeks. Biocompatibility tests in vitro demonstrate the lack of implant proinflammatory potential and hindered adhesion of L929 cells on the implant surface. Implants exhibit low acute toxicity and elicit a normal acute foreign body reaction that reaches the early stages of fibrous capsule formation after 7 days.
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Affiliation(s)
- Željko Janićijević
- University of Belgrade, School of Electrical Engineering, Bulevar kralja Aleksandra 73, 11120, Belgrade, Serbia.,Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Knez Mihailova 35/IV, 11000, Belgrade, Serbia
| | - Marina Ninkov
- Department of Ecology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Bulevar despota Stefana 142, 11060, Belgrade, Serbia
| | - Milena Kataranovski
- Department of Ecology, Institute for Biological Research "Siniša Stanković", University of Belgrade, Bulevar despota Stefana 142, 11060, Belgrade, Serbia.,Department of Physiology and Biochemistry, University of Belgrade, Studenstki trg 16, 11000, Belgrade, Serbia
| | - Filip Radovanović
- Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Knez Mihailova 35/IV, 11000, Belgrade, Serbia
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124
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Investigative Study on Nitric Oxide Production in Human Dermal Fibroblast Cells under Normal and High Glucose Conditions. Med Sci (Basel) 2018; 6:medsci6040099. [PMID: 30423993 PMCID: PMC6313404 DOI: 10.3390/medsci6040099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/24/2018] [Accepted: 10/31/2018] [Indexed: 12/26/2022] Open
Abstract
Diabetic foot ulcers (DFU) are a major health problem associated with diabetes mellitus. Impaired nitric oxide (NO) production has been shown to be a major contributor to the dysregulation of healing in DFU. The level of impairment is not known primarily due to challenges with measuring NO. Herein, we report the actual level of NO produced by human dermal fibroblasts cultured under normal and high glucose conditions. Fibroblasts produce the extracellular matrix, which facilitate the migration of keratinocytes to close wounds. The results show that NO production was significantly higher in normal glucose compared to high glucose conditions. The real-time NO detected was compared to the nitrite present in the culture media and there was a direct correlation between real-time NO and nitrite in normal glucose conditions. However, real-time NO detection and nitrite measurement did not correlate under high glucose conditions. The inducible nitric oxide synthase (iNOS) enzyme responsible for NO production was upregulated in normal and high glucose conditions and the proliferation rate of fibroblasts was not statistically different in all the treatment groups. Relying only on nitrite to assess NO production is not an accurate determinant of the NO present in the wound bed in pathological states such as diabetes mellitus.
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125
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O’Neill AM, Gallo RL. Host-microbiome interactions and recent progress into understanding the biology of acne vulgaris. MICROBIOME 2018; 6:177. [PMID: 30285861 PMCID: PMC6169095 DOI: 10.1186/s40168-018-0558-5] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 09/11/2018] [Indexed: 05/07/2023]
Abstract
Acne is one of the most common skin diseases worldwide and results in major health care costs and significant morbidity to severely affected individuals. However, the pathophysiology of this disorder is not well understood. Host-microbiome interactions that affect both innate and adaptive immune homeostasis appear to be a central factor in this disease, with recent observations suggesting that the composition and activities of the microbiota in acne is perturbed. Staphylococcus epidermidis and Cutibacterium acnes (C. acnes; formerly Propionibacterium acnes) are two major inhabitants of the skin that are thought to contribute to the disease but are also known to promote health by inhibiting the growth and invasion of pathogens. Because C. acnes is ubiquitous in sebaceous-rich skin, it is typically labeled as the etiological agent of acne yet it fails to fulfill all of Koch's postulates. The outdated model of acne progression proposes that increased sebum production promotes over-proliferation of C. acnes in a plugged hair follicle, thereby driving inflammation. In contrast, growing evidence indicates that C. acnes is equally abundant in both unaffected and acne-affected follicles. Moreover, recent advances in metagenomic sequencing of the acne microbiome have revealed a diverse population structure distinct from healthy individuals, uncovering new lineage-specific virulence determinants. In this article, we review recent developments in the interactions of skin microbes with host immunity, discussing the contribution of dysbiosis to the immunobiology of acne and newly emerging skin microbiome-based therapeutics to treat acne.
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Affiliation(s)
- Alan M. O’Neill
- Department of Dermatology, University of California San Diego, La Jolla, CA 92037 USA
| | - Richard L. Gallo
- Department of Dermatology, University of California San Diego, La Jolla, CA 92037 USA
- Department of Dermatology, University of California San Diego, 9500 Gillman Dr., #0869, La Jolla, CA 92093 USA
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126
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Champeau M, Póvoa V, Militão L, Cabrini FM, Picheth GF, Meneau F, Jara CP, de Araujo EP, de Oliveira MG. Supramolecular poly(acrylic acid)/F127 hydrogel with hydration-controlled nitric oxide release for enhancing wound healing. Acta Biomater 2018; 74:312-325. [PMID: 29777958 DOI: 10.1016/j.actbio.2018.05.025] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 05/07/2018] [Accepted: 05/15/2018] [Indexed: 01/20/2023]
Abstract
Topical nitric oxide (NO) delivery has been shown to accelerate wound healing. However, delivering NO to wounds at appropriate rates and doses requires new biomaterial-based strategies. Here, we describe the development of supramolecular interpolymer complex hydrogels comprising PEO-PPO-PEO (F127) micelles embedded in a poly(acrylic acid) (PAA) matrix, with S-nitrosoglutathione (GSNO) molecules dissolved in the hydrophilic domain. We show that PAA:F127/GSNO hydrogels start releasing NO upon hydration at rates controlled by their rates of water absorption. SAXS measurements indicate that the supramolecular structure of the hydrogels retains long-range order domains of F127 micelles. The PAA/F1227 hydrogels displayed dense morphologies and reduced rates of hydration. The NO release rates remain constant over the first 200 min, are directly correlated with the hydration rates of the PAA:F127/GSNO hydrogels, and can be modulated in the range of 40 nmol/g h to 1.5 μmol/g h by changing the PAA:F127 mass ratio. Long-term NO-release profiles over 5 days are governed by the first-order exponential decay of GSNO, with half-lives in the range of 0.5-3.4 days. A preliminary in vivo study on full-thickness excisional wounds in mice showed that topical NO release from the PAA:F127/GSNO hydrogels is triggered by exudate absorption and leads to increased angiogenesis and collagen fiber organization, as well as TGF-β, IGF-1, SDF-1, and IL-10 gene expressions in the cicatricial tissue. In summary, these results suggest that hydration-controlled NO release from topical PAA:F127/GSNO hydrogels is a potential strategy for enhancing wound healing. STATEMENT OF SIGNIFICANCE The topical delivery of nitric oxide (NO) to wounds may provide significant beneficial results and represent a promising strategy to treat chronic wounds. However, wound dressings capable of releasing NO after application and allowing the modulation of NO release rates, demand new platforms. Here, we describe a novel strategy to overcome these challenges, based on the use of supramolecular poly(acrylic acid) (PAA):F127 hydrogels charged with the NO donor S-nitrosoglutathione (GSNO) from whereby the NO release can be triggered by exudate absorption and delivered to the wound at rates controlled by the PAA:F127 mass ratio. Preliminary in vivo results offer a proof of concept for this strategy by demonstrating increased angiogenesis; collagen fibers organization; and TGF-β, IGF-1, SDF-1, and IL-10 gene expressions in the cicatricial tissue after topical treatment with a PAA:F127/GSNO hydrogel.
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127
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Cao GJ, Fisher CM, Jiang X, Chong Y, Zhang H, Guo H, Zhang Q, Zheng J, Knolhoff AM, Croley TR, Yin JJ. Platinum nanoparticles: an avenue for enhancing the release of nitric oxide from S-nitroso-N-acetylpenicillamine and S-nitrosoglutathione. NANOSCALE 2018; 10:11176-11185. [PMID: 29873378 DOI: 10.1039/c8nr03874k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nitric oxide (NO) is an endogenous bioregulator with established roles in diverse fields. The difficulty in the modulation of NO release is still a significant obstacle to achieving successful clinical applications. We report herein our initial work using electron spin resonance (ESR) spectroscopy to detect NO generated from S-nitroso-N-acetylpenicillamine (SNAP) and S-nitrosoglutathione (GSNO) donors catalyzed by platinum nanoparticles (Pt NPs, 3 nm) under physiological conditions. With ESR spectroscopy coupled with spin trapping and spin labeling techniques, we identified that Pt NPs can significantly promote the generation of NO from SNAP and GSNO under physiological conditions. A classic NO colorimetric detection kit was also employed to verify that Pt NPs truly triggered the release of NO from its donors. Pt NPs can act as promising delivery vehicles for on-demand NO delivery based on time and dosage. These results, along with the detection of the resulting disulfide product, were confirmed with mass spectrometry. In addition, cellular experiments provided a convincing demonstration that the triggered release of NO from its donors by Pt NPs is efficient in killing human cancer cells in vitro. The catalytic mechanism was elucidated by X-ray photo-electron spectroscopy (XPS) and ultra-high performance liquid chromatography/high-resolution mass spectrometry (UHPLC-HRMS), which suggested that Pt-S bond formation occurs in the solution of Pt NPs and NO donors. Identification of Pt NPs capable of generating NO from S-nitrosothiols (RSNOs) is an important step in harnessing NO for investigations into its clinical applications and therapies.
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Affiliation(s)
- Gao-Juan Cao
- Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
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128
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Brown MD, Schoenfisch MH. Catalytic selectivity of metallophthalocyanines for electrochemical nitric oxide sensing. Electrochim Acta 2018; 273:98-104. [PMID: 30739948 PMCID: PMC6366661 DOI: 10.1016/j.electacta.2018.03.139] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The catalytic properties of metallophthalocyanine (MPc) complexes have long been applied to electrochemical sensing of nitric oxide (NO) to amplify sensitivity and reduce the substantial overpotential required for NO oxidation. The latter point has significant ramifications for in situ amperometric detection, as large working potentials oxidize biological interferents (e.g., nitrite, L-ascorbate, and carbon monoxide). Herein, we sought to isolate and quantify, for the first time, the selectivity benefits of MPc modification of glassy carbon electrodes. A series of the most catalytically active MPc complexes towards NO, including Fe(II)Pc, Co(II)Pc, Ni(II)Pc, and Zn(II)Pc, was selected and probed for NO sensing ability under both differential pulse voltammetry (DPV) and constant potential amperometry (CPA). Data from DPV measurements provided information with respect to MPc signal sensitivity amplification (~1.5×) and peak shifting (100-200 mV). Iron-Pc exerted the most specific catalytic activity towards NO over nitrite. Catalyst-enabled reduction of the working potential under CPA was found to improve selectivity for NO over high potential interferents, regardless of MPc. However, impaired selectivity against low potential interferents was also noted.
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Affiliation(s)
- Micah D. Brown
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC, 27599, USA
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC, 27599, USA
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129
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Brown MS, Ashley B, Koh A. Wearable Technology for Chronic Wound Monitoring: Current Dressings, Advancements, and Future Prospects. Front Bioeng Biotechnol 2018; 6:47. [PMID: 29755977 PMCID: PMC5932176 DOI: 10.3389/fbioe.2018.00047] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 04/03/2018] [Indexed: 12/14/2022] Open
Abstract
Chronic non-healing wounds challenge tissue regeneration and impair infection regulation for patients afflicted with this condition. Next generation wound care technology capable of in situ physiological surveillance which can diagnose wound parameters, treat various chronic wound symptoms, and reduce infection at the wound noninvasively with the use of a closed loop therapeutic system would provide patients with an improved standard of care and an accelerated wound repair mechanism. The indicating biomarkers specific to chronic wounds include blood pressure, temperature, oxygen, pH, lactate, glucose, interleukin-6 (IL-6), and infection status. A wound monitoring device would help decrease prolonged hospitalization, multiple doctors' visits, and the expensive lab testing associated with the diagnosis and treatment of chronic wounds. A device capable of monitoring the wound status and stimulating the healing process is highly desirable. In this review, we discuss the impaired physiological states of chronic wounds and explain the current treatment methods. Specifically, we focus on improvements in materials, platforms, fabrication methods for wearable devices, and quantitative analysis of various biomarkers vital to wound healing progress.
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Affiliation(s)
- Matthew S Brown
- Department of Biomedical Engineering, State University of New York at Binghamton University, Binghamton, NY, United States
| | - Brandon Ashley
- Department of Biomedical Engineering, State University of New York at Binghamton University, Binghamton, NY, United States
| | - Ahyeon Koh
- Department of Biomedical Engineering, State University of New York at Binghamton University, Binghamton, NY, United States
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Hunt SD, Elg F, Percival SL. Assessment of clinical effectiveness of haemoglobin spray as adjunctive therapy in the treatment of sloughy wounds. J Wound Care 2018; 27:210-219. [PMID: 29637828 DOI: 10.12968/jowc.2018.27.4.210] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To assess use of an adjunctive topical haemoglobin spray in the treatment of sloughy wounds. METHOD In addition to a standard wound care regimen, consecutive patients with sloughy wounds self-administered haemoglobin spray treatment twice a week until the wound was healed. All patients were followed-up for 26 weeks. Results were compared with a retrospective cohort of 100 consecutive patients, treated during the same period the previous year with standard wound care alone. Data were collected on wound characteristics including percentage of slough, exudate levels, wound pain, and wound size. RESULTS After 26 weeks, 94/100 patients (94%) treated with haemoglobin spray were completely healed compared with 63/100 control patients (63%). Positive results were evident as early as week one with 52% mean wound size reduction using the heamoglobin spray versus 11% in the retrospective control (p<0.001). At baseline, mean slough coverage was higher in the haemoglobin group, 58% versus 44% in the control group (p<0.001). By week four, mean slough coverage was 1% in the haemoglobin versus 29% in the control group (p<0.001). Reductions in exudate and pain levels (p<0.001) were also observed. CONCLUSION Overall, results of this evaluation showed the addition of adjunctive haemoglobin spray to standard wound care treatment achieved positive clinical outcomes for patients self-managing complicated sloughy wounds, by supporting reduction of wound exudate and slough within the complex multifaceted process of wound healing.
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Affiliation(s)
- Sharon D Hunt
- Lead Nurse, Advanced Nurse Practitioner, Wellway Medical Group, Independent Specialist Wound Care, Northumberland, Berwick Upon Tweed
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131
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Tandon B, Magaz A, Balint R, Blaker JJ, Cartmell SH. Electroactive biomaterials: Vehicles for controlled delivery of therapeutic agents for drug delivery and tissue regeneration. Adv Drug Deliv Rev 2018; 129:148-168. [PMID: 29262296 DOI: 10.1016/j.addr.2017.12.012] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/24/2017] [Accepted: 12/16/2017] [Indexed: 01/09/2023]
Abstract
Electrical stimulation for delivery of biochemical agents such as genes, proteins and RNA molecules amongst others, holds great potential for controlled therapeutic delivery and in promoting tissue regeneration. Electroactive biomaterials have the capability of delivering these agents in a localized, controlled, responsive and efficient manner. These systems have also been combined for the delivery of both physical and biochemical cues and can be programmed to achieve enhanced effects on healing by establishing control over the microenvironment. This review focuses on current state-of-the-art research in electroactive-based materials towards the delivery of drugs and other therapeutic signalling agents for wound care treatment. Future directions and current challenges for developing effective electroactive approach based therapies for wound care are discussed.
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132
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Singer AJ, Choi Y, Rashel M, Toussaint J, McClain SA. The effects of topical nitric oxide on healing of partial thickness porcine burns. Burns 2018; 44:423-428. [DOI: 10.1016/j.burns.2017.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/15/2017] [Accepted: 07/20/2017] [Indexed: 10/19/2022]
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133
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Henatsch D, Alsulami S, Duijvestijn AM, Cleutjens JP, Peutz-Kootstra CJ, Stokroos RJ. Histopathological and Inflammatory Features of Chronically Discharging Open Mastoid Cavities: Secondary Analysis of a Randomized Clinical Trial. JAMA Otolaryngol Head Neck Surg 2018; 144:211-217. [PMID: 29327047 DOI: 10.1001/jamaoto.2017.2801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Importance Many patients with an open radical mastoid cavity experience therapy-resistant otorrhea. Little is known about the underlying histopathological substrate of unstable cavities and the correlation with treatment failure. Objective To study the histopathological and inflammatory features of chronically discharging open radical mastoid cavities and the influence of different treatments. Design, Setting, and Participants This secondary analysis of a randomized clinical trial was a histopathology study of tissue samples of a cohort of 30 patients with a chronically discharging open mastoid cavity. Samples were taken from the cavities, which were treated with either honey gel or conventional eardrops in a tertiary center between 2012 and 2013. Tissue staining was performed in May 2014; final computer analysis/correlation studies were performed in June 2016. Main Outcomes and Measures Differences of epithelial tissue coverage, infiltration of T cells (CD3, CD4, CD8) and macrophage (CD68, isoenzyme nitric oxide synthase, arginase 1) (sub-)populations, infection status, and the correlation with clinical presentation. Results There were 30 patients (24 [80%] male; mean [SD] age, 59 [14] years). Cavities were covered with either stratified squamous (keratinized) epithelium (n = 10), respiratory columnar epithelium (n = 9), or granulation tissue (n = 10). The presence of respiratory epithelium was associated with lower treatment success (posttreatment VAS improvement of 3.1 [95% CI, 0.5 to 5.8] for discomfort and 3.6 [95% CI, 0.2 to 6.9] for otorrhea in the group with granulation tissue coverage vs 4.9 [95% CI, 0.2 to 9.6] and 5.8 [95% CI, -0.1 to 11.6] in the group with squamous [keratinized] epithelium coverage and 1.4 [95% CI, -1.2 to 4.1] and 2.5 [95% CI, -1.3 to 6.2] in the group with respiratory columnar epithelium coverage). In all 3 tissue types of cavity-covering tissues, T-cell infiltrates consisted of helper T cells and cytotoxic T cells, together with a lower number of macrophages. The immunopositivity for isoenzyme nitric oxide synthase and arginase 1 was high and not restricted to a macrophage subpopulation, but seen in various cell types. Inflammatory infiltrations varied strongly in all 3 tissue modalities. Conclusions and Relevance Discharging open mastoid cavities can be classified histologically into 3 different types, based on their coverage: squamous epithelium, respiratory epithelium, or granulation tissue. Treatment is less successful in cavities covered with respiratory epithelium, possibly explained by the status of bacterial infection and local immunological differences.
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Affiliation(s)
- Darius Henatsch
- Department of Otorhinolaryngology-Head and Neck Surgery, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Sultan Alsulami
- Department of Otorhinolaryngology-Head and Neck Surgery, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Adriaan M Duijvestijn
- Internal Medicine, Clinical and Experimental Immunology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Jack P Cleutjens
- Department of Pathology, Maastricht University Medical Center+, Cardiovascular Research Institute Maastricht, Maastricht, the Netherlands
| | - Carine J Peutz-Kootstra
- Department of Pathology, Maastricht University Medical Center+, Cardiovascular Research Institute Maastricht, Maastricht, the Netherlands
| | - Robert J Stokroos
- Department of Otorhinolaryngology-Head and Neck Surgery, Maastricht University Medical Center+, Maastricht, the Netherlands
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Acuña A, Basílio N, Parajó M, Mejuto JC, Pérez-Juste J, Taladriz-Blanco P, Garcia-Rio L. Nitric oxide release from a cucurbituril encapsulated NO-donor. Org Biomol Chem 2018; 16:4272-4278. [DOI: 10.1039/c8ob00895g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The denitrosation of a S-nitrosothiol derivative, nitrosomercaptopyridine (SNO+), can be inhibited by incorporation into the cucurbit[7]uril cavity. Owing to the reversible character of host : guest complexation, SNO+ can be expelled from the host cavity through the application of a chemical stimulus allowing controlled nitric oxide release.
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Affiliation(s)
- A. Acuña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Departamento de Química Física
- Universidade de Santiago
- 15782 Santiago
- Spain
| | - N. Basílio
- LAQV
- REQUIMTE
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade NOVA de Lisboa
| | - M. Parajó
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Departamento de Química Física
- Universidade de Santiago
- 15782 Santiago
- Spain
| | - J. C. Mejuto
- Departamento de Química Física
- Facultad de Ciencias
- Universidade de Vigo
- E32004 Ourense
- Spain
| | - J. Pérez-Juste
- Departamento de Química Física and CINBIO
- Universidade de Vigo
- 36310 Vigo
- Spain
| | - P. Taladriz-Blanco
- Departamento de Química Física and CINBIO
- Universidade de Vigo
- 36310 Vigo
- Spain
| | - L. Garcia-Rio
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Departamento de Química Física
- Universidade de Santiago
- 15782 Santiago
- Spain
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136
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Mendt M, Barth B, Hartmann M, Pöppl A. Low-temperature binding of NO adsorbed on MIL-100(Al)—A case study for the application of high resolution pulsed EPR methods and DFT calculations. J Chem Phys 2017; 147:224701. [DOI: 10.1063/1.4995551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Matthias Mendt
- Felix-Bloch-Institut für Festkörperphysik, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Benjamin Barth
- Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Martin Hartmann
- Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Andreas Pöppl
- Felix-Bloch-Institut für Festkörperphysik, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
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137
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Pulsed Electromagnetic Fields for Postsurgical Pain Management in Women Undergoing Cesarean Section: A Randomized, Double-Blind, Placebo-controlled Trial. Clin J Pain 2017; 33:142-147. [PMID: 28060214 DOI: 10.1097/ajp.0000000000000376] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES To evaluate the efficacy of pulsed electromagnetic field (PEMF) in relation to reducing postoperative pain, analgesic use, and wound healing in patients undergoing Cesarean section (C-section). METHODS This randomized, double-blind, placebo-controlled trial evaluated 72 women who underwent elective C-section. Thirty-six patients were assigned to the active-PEMF and 36 to the sham-PEMF groups. The participants were asked to report their pain intensity on a Visual Analog Scale (VAS) at 2, 4, 6, 12, and 24 hours and 2, 4, and 7 days after surgery. The amount of analgesics used was recorded. The surgical site was evaluated to assess the wound-healing process on the seventh postoperative day. RESULTS Postoperative pain VAS scores were significantly lower in the active-PEMF group in all the measured periods within the early and the late postoperative periods. Fewer women in the active-PEMF group experienced severe postoperative pain within 24 hours postoperatively (36% vs. 72%, P=0.002). Analgesic use during the first 24 hours after C-section was 1.9-times lower in the active-PEMF group (1.6±0.7 vs. 3.1±1.2, P<0.001). The total analgesic use during the seventh postoperative days was 2.1-times lower in the active-PEMF group than in the sham group (1.7±0.7 vs. 3.7±1.1, P<0.001). Seven days postoperatively, patients in the active-PEMF group had better wound healing with no exudate, erythema, or edema (P=0.02). CONCLUSIONS PEMF treatment after C-section decreases postsurgical pain, analgesic use, and surgical wound exudate and edema significantly, and is associated with a high level of patient satisfaction.
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138
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A novel lignin-based nanofibrous dressing containing arginine for wound-healing applications. Drug Deliv Transl Res 2017; 8:111-122. [DOI: 10.1007/s13346-017-0441-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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139
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Hoseinpour Najar M, Minaiyan M, Taheri A. Preparation and in vivo evaluation of a novel gel-based wound dressing using arginine–alginate surface-modified chitosan nanofibers. J Biomater Appl 2017; 32:689-701. [DOI: 10.1177/0885328217739562] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The development of an effective wound dressing with the ability to induce skin wound healing is a great challenge in medicine. Nanofibers are highly attractive for wound dressing preparation due to their properties such as hemostasis induction, good absorption of wound exudates, and facilitation of cell growth. Chitosan nanofibers have attracted great attention for application in wound dressings due to their accelerating effects on wound healing. In this study, arginine surface-modified chitosan nanofibers were successfully prepared by attachment of arginine molecules on the surface of chitosan nanofibers using sodium alginate through electrostatic interaction. The effect of pH on the amount of attached arginine was evaluated at three different pH values; 5, 6, and 7. Fourier-transform infrared spectroscopy and zeta potential of chitosan nanofibers before and after surface modification suggested the occurrence of the attachment of arginine to chitosan nanofibers. Scanning electron microscope images showed the nanofibrous structure of arginine surface-modified chitosan nanofibers with an average diameter ranging from 100 nm to 150 nm. The release of arginine from arginine surface-modified chitosan nanofibers gel showed a sustained release manner. The suitable viscosity and spreadability of arginine surface-modified chitosan nanofibers gel verified its easy application at the wound site. Arginine surface-modified chitosan nanofibers gel significantly improved the wound healing process including wound closure when tested in vivo using rat model. Additionally, histological examination and immunohistochemical studies showed the significant enhancement of the re-epithelialization, collagen deposition, and angiogenesis in the skin of the animal group treated with arginine surface-modified chitosan nanofibers gel compared with the other control groups. These results suggested that arginine surface-modified chitosan nanofibers gel could be introduced as an effective wound dressing.
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Affiliation(s)
- Mahsa Hoseinpour Najar
- Novel Drug Delivery Systems Research Center, Department of Pharmaceutics, Faculty of Pharmacy, Isfahan University of Medical sciences, Isfahan, Iran
| | - Mohsen Minaiyan
- Department of Pharmacology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Azade Taheri
- Novel Drug Delivery Systems Research Center, Department of Pharmaceutics, Faculty of Pharmacy, Isfahan University of Medical sciences, Isfahan, Iran
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Spondias purpurea L. (Anacardiaceae): Antioxidant and Antiulcer Activities of the Leaf Hexane Extract. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:6593073. [PMID: 29213351 PMCID: PMC5682066 DOI: 10.1155/2017/6593073] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 09/06/2017] [Accepted: 09/28/2017] [Indexed: 12/12/2022]
Abstract
Spondias purpurea is used in folk medicine to treat diarrhea and diuresis. The objective of this study was to evaluate the phytochemical profile and antioxidant and antiulcer activities of the hexane extract of the leaves of S. purpurea (SpHE). Phytochemical profile was evaluated via thin layer chromatography (TLC) and HPLC. SpHE was screened for antioxidant activities using DPPH, ABTS, FRAP, and phosphomolybdenum assays. To determine its antiulcer properties, animals were pretreated with injured control, lansoprazole, ranitidine, carbenoxolone, or SpHE (12.5, 25, and 50 mg/kg) and were screened; acute ulcers were induced by HCl/ethanol, absolute ethanol, and nonsteroidal anti-inflammatory drug (NSAID). TLC revealed the presence of flavonoids, whereas HPLC analysis showed the presence of caffeic acid and epigallocatechin. The phenolic compounds and in vitro assays showed antioxidant activity. After gastric ulcer induction by using HCl/ethanol, SpHE reduced the area of ulcerative lesions by 82, 91, and 88%, respectively. In ethanol, SpHE reduced the area of ulcerative lesions by 77, 93, and 92%, respectively. In the NSAID, the percentages of protection were 70, 76, and 78%, respectively. SpHE promoted the minimization of ulcers, increased the levels of reduced glutathione, and decreased tumor necrosis factor. S. purpurea has antioxidant and antiulcer properties.
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Qin Y, Zajda J, Brisbois EJ, Ren H, Toomasian JM, Major TC, Rojas-Pena A, Carr B, Johnson T, Haft JW, Bartlett RH, Hunt AP, Lehnert N, Meyerhoff ME. Portable Nitric Oxide (NO) Generator Based on Electrochemical Reduction of Nitrite for Potential Applications in Inhaled NO Therapy and Cardiopulmonary Bypass Surgery. Mol Pharm 2017; 14:3762-3771. [DOI: 10.1021/acs.molpharmaceut.7b00514] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yu Qin
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Joanna Zajda
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Elizabeth J. Brisbois
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Hang Ren
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - John M. Toomasian
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Terry C. Major
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alvaro Rojas-Pena
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Benjamin Carr
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Thomas Johnson
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jonathan W. Haft
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Robert H. Bartlett
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Andrew P. Hunt
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Nicolai Lehnert
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark E. Meyerhoff
- Department of Chemistry and ‡Department of
Surgery, University of Michigan, Ann Arbor, Michigan 48109, United States
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Kunkemoeller B, Kyriakides TR. Redox Signaling in Diabetic Wound Healing Regulates Extracellular Matrix Deposition. Antioxid Redox Signal 2017; 27:823-838. [PMID: 28699352 PMCID: PMC5647483 DOI: 10.1089/ars.2017.7263] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SIGNIFICANCE Impaired wound healing is a major complication of diabetes, and can lead to development of chronic foot ulcers in a significant number of patients. Despite the danger posed by poor healing, very few specific therapies exist, leaving patients at risk of hospitalization, amputation, and further decline in overall health. Recent Advances: Redox signaling is a key regulator of wound healing, especially through its influence on the extracellular matrix (ECM). Normal redox signaling is disrupted in diabetes leading to several pathological mechanisms that alter the balance between reactive oxygen species (ROS) generation and scavenging. Importantly, pathological oxidative stress can alter ECM structure and function. CRITICAL ISSUES There is limited understanding of the specific role of altered redox signaling in the diabetic wound, although there is evidence that ROS are involved in the underlying pathology. FUTURE DIRECTIONS Preclinical studies of antioxidant-based therapies for diabetic wound healing have yielded promising results. Redox-based therapeutics constitute a novel approach for the treatment of wounds in diabetes patients that deserve further investigation. Antioxid. Redox Signal. 27, 823-838.
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Affiliation(s)
- Britta Kunkemoeller
- 1 Department of Pathology, Yale University School of Medicine , New Haven, Connecticut
- 2 Interdepartmental Program in Vascular Biology and Therapeutics, Yale University School of Medicine , New Haven, Connecticut
| | - Themis R Kyriakides
- 1 Department of Pathology, Yale University School of Medicine , New Haven, Connecticut
- 2 Interdepartmental Program in Vascular Biology and Therapeutics, Yale University School of Medicine , New Haven, Connecticut
- 3 Department of Biomedical Engineering, Yale University , New Haven, Connecticut
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Cheng H, Pan Y, Yao Y, Zhu Z, Chen J, Sun X, Qiu Y, Ding Y. Expression and significance of caveolin-1 in hepatitis B virus-associated hepatocellular carcinoma. Exp Ther Med 2017; 14:4356-4362. [PMID: 29067114 DOI: 10.3892/etm.2017.5038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 05/19/2017] [Indexed: 12/21/2022] Open
Abstract
Caveolin-1 (Cav-1) is a major component of caveolae and has been recently identified as a tumor suppressor. As little is known about Cav-1 in hepatitis B virus (HBV)-associated hepatocellular carcinoma (HCC), the aim of the present study was to investigate the expression and significance of Cav-1 in HBV-associated HCC. Semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) was performed to detect the mRNA expression level of Cav-1 in 40 cases of HBV-associated HCC, the corresponding 11 non-tumor cases of HBV-associated chronic hepatitis, 29 non-tumor cases of HBV-associated cirrhosis and 6 cases of normal liver tissues. Immunohistochemical analysis indicated the expression of Cav-1, cluster of differentiation 34 and vascular endothelial growth factor (VEGF) in HBV-associated HCC tissue samples. In addition, the association of Cav-1 expression with angiogenesis and clinicopathological characteristics of HBV-associated HCC was also analyzed. RT-PCR results demonstrated that the expression rate of Cav-1 mRNA in HBV-associated HCC, non-tumor HBV-associated chronic hepatitis and cirrhosis liver tissues and control normal liver tissues from patients with metastatic carcinoma was 92.5, 85.0 and 16.7%, respectively. mRNA expression level of Cav-1 was significantly increased in chronic hepatitis, cirrhosis and HBV-associated HCC livers compared with normal control livers (P<0.05 and P<0.01, respectively). Cav-1 protein was detected by immunohistochemistry in 80% of the samples of HBV-associated HCC. Furthermore, Cav-1 and VEGF protein expression levels were correlated with microvessel density (MVD; γs<0.46, P=0.01 and γs<0.31, P=0.05, respectively). In addition, Cav-1 expression and MVD were significantly associated with metastasis (P=0.031 and P=0.046, respectively). In conclusion, Cav-1 may have an important role in the carcinogenesis and progression of HBV-associated HCC and angiogenesis may be affected by Cav-1 during this process.
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Affiliation(s)
- Hao Cheng
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Yiming Pan
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Yongzhong Yao
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Zhanghua Zhu
- Department of Intensive Care Unit, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Jun Chen
- Department of Pathology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Xitai Sun
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Yudong Qiu
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
| | - Yitao Ding
- Department of Hepato-Pancreato-Biliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
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Photocrosslinked maleilated chitosan/methacrylated poly (vinyl alcohol) bicomponent nanofibrous scaffolds for use as potential wound dressings. Carbohydr Polym 2017; 168:220-226. [DOI: 10.1016/j.carbpol.2017.03.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 03/08/2017] [Accepted: 03/13/2017] [Indexed: 11/22/2022]
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145
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Bennacef-Heffar N, Laraba-Djebari F. Beneficial effects of Heparin and l Arginine on dermonecrosis effect induced by Vipera lebetina venom: Involvement of NO in skin regeneration. Acta Trop 2017; 171:226-232. [PMID: 28427959 DOI: 10.1016/j.actatropica.2017.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/03/2017] [Accepted: 04/14/2017] [Indexed: 11/17/2022]
Abstract
It is well known that snake venoms such as Viperidae caused severe local effects such as hemorrhage, myonecrosis and dermonecrosis which can lead to permanent tissue loss or the disability. The aim of this study is to evaluate the skin regeneration using heparin and l-arginine as well as the dermonecrotic effects induced by Vipera lebetina venom (VLV). To better understand the toxic effects induced by VLV and to prevent or treat these effects, we evaluate the local effects and the skin regeneration with or without drugs. The evaluation of NO as a marker of angiogenesis was also undertaken to understand its involvement in tissue wound healing and skin regeneration after envenomation. Obtained results showed that this venom is able to induce severe necrosis characterized by hemorrhage, hair follicles' destruction, glandular structure and increased of the thickness (acanthosis) in the epidermo-dermic junction. Inflammatory cells were also observed in the dermis. Pretreatment with heparin or L arginine seemed to decrease the induced dermonecrotic after one and two weeks improving the skin regeneration. The high level of NO could be involved in this regeneration, since it participates in the skin homeostatic functions' regulation and the maintenance of the skin protective barrier integrity against microorgansims. Nitric oxide plays also a key role in wound healing; it acts as a potent mitogenic stimulus to keratinocytes during skin repair and enhances the hair follicles and sebaceous gland structure that appeared after two weeks of treatment. Thus, these drugs could be used in therapeutic approach for dermonecrotic skin repair.
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Affiliation(s)
- Nouara Bennacef-Heffar
- USTHB, Faculty of Biological Sciences, Laboratory of Cellular and Molecular Biology, BP 32 El-Alia, Bab Ezzouar, Algiers, Algeria
| | - Fatima Laraba-Djebari
- USTHB, Faculty of Biological Sciences, Laboratory of Cellular and Molecular Biology, BP 32 El-Alia, Bab Ezzouar, Algiers, Algeria.
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146
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Kubinova S, Zaviskova K, Uherkova L, Zablotskii V, Churpita O, Lunov O, Dejneka A. Non-thermal air plasma promotes the healing of acute skin wounds in rats. Sci Rep 2017; 7:45183. [PMID: 28338059 PMCID: PMC5364525 DOI: 10.1038/srep45183] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 02/16/2017] [Indexed: 02/08/2023] Open
Abstract
Non-thermal plasma (NTP) has nonspecific antibacterial effects, and can be applied as an effective tool for the treatment of chronic wounds and other skin pathologies. In this study we analysed the effect of NTP on the healing of the full-thickness acute skin wound model in rats. We utilised a single jet NTP system generating atmospheric pressure air plasma, with ion volume density 5 · 1017 m-3 and gas temperature 30-35 °C. The skin wounds were exposed to three daily plasma treatments for 1 or 2 minutes and were evaluated 3, 7 and 14 days after the wounding by histological and gene expression analysis. NTP treatment significantly enhanced epithelization and wound contraction on day 7 when compared to the untreated wounds. Macrophage infiltration into the wound area was not affected by the NTP treatment. Gene expression analysis did not indicate an increased inflammatory reaction or a disruption of the wound healing process; transient enhancement of inflammatory marker upregulation was found after NTP treatment on day 7. In summary, NTP treatment had improved the healing efficacy of acute skin wounds without noticeable side effects and concomitant activation of pro-inflammatory signalling. The obtained results highlight the favourability of plasma applications for wound therapy in clinics.
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Affiliation(s)
- S Kubinova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - K Zaviskova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic.,2nd Medical Faculty, Charles University, Prague, Czech Republic
| | - L Uherkova
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - V Zablotskii
- Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - O Churpita
- Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - O Lunov
- Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - A Dejneka
- Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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147
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Hamdan S, Pastar I, Drakulich S, Dikici E, Tomic-Canic M, Deo S, Daunert S. Nanotechnology-Driven Therapeutic Interventions in Wound Healing: Potential Uses and Applications. ACS CENTRAL SCIENCE 2017; 3:163-175. [PMID: 28386594 PMCID: PMC5364456 DOI: 10.1021/acscentsci.6b00371] [Citation(s) in RCA: 245] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Indexed: 05/09/2023]
Abstract
The chronic nature and associated complications of nonhealing wounds have led to the emergence of nanotechnology-based therapies that aim at facilitating the healing process and ultimately repairing the injured tissue. A number of engineered nanotechnologies have been proposed demonstrating unique properties and multiple functions that address specific problems associated with wound repair mechanisms. In this outlook, we highlight the most recently developed nanotechnology-based therapeutic agents and assess the viability and efficacy of each treatment, with emphasis on chronic cutaneous wounds. Herein we explore the unmet needs and future directions of current technologies, while discussing promising strategies that can advance the wound-healing field.
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Affiliation(s)
- Suzana Hamdan
- Department of Biochemistry
and Molecular Biology, Miller School of Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United
States
| | - Irena Pastar
- Wound Healing and Regenerative Medicine Research Program,
Department of Dermatology and Cutaneous Surgery, Miller School of
Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United States
| | - Stefan Drakulich
- Wound Healing and Regenerative Medicine Research Program,
Department of Dermatology and Cutaneous Surgery, Miller School of
Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United States
| | - Emre Dikici
- Department of Biochemistry
and Molecular Biology, Miller School of Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United
States
| | - Marjana Tomic-Canic
- Wound Healing and Regenerative Medicine Research Program,
Department of Dermatology and Cutaneous Surgery, Miller School of
Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United States
| | - Sapna Deo
- Department of Biochemistry
and Molecular Biology, Miller School of Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United
States
| | - Sylvia Daunert
- Department of Biochemistry
and Molecular Biology, Miller School of Medicine, University of Miami, 1011 NW 15th Street, Miami, Florida 33136, United
States
- E-mail:
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148
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da Silva LP, Santos TC, Rodrigues DB, Pirraco RP, Cerqueira MT, Reis RL, Correlo VM, Marques AP. Stem Cell-Containing Hyaluronic Acid-Based Spongy Hydrogels for Integrated Diabetic Wound Healing. J Invest Dermatol 2017; 137:1541-1551. [PMID: 28259681 DOI: 10.1016/j.jid.2017.02.976] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 01/31/2017] [Accepted: 02/06/2017] [Indexed: 12/27/2022]
Abstract
The detailed pathophysiology of diabetic foot ulcers is yet to be established and improved treatments are still required. We propose a strategy that directs inflammation, neovascularization, and neoinnervation of diabetic wounds. Aiming to potentiate a relevant secretome for nerve regeneration, stem cells were precultured in hyaluronic acid-based spongy hydrogels under neurogenic/standard media before transplantation into diabetic mice full-thickness wounds. Acellular spongy hydrogels and empty wounds were used as controls. Re-epithelialization was attained 4 weeks after transplantation independently of the test groups, whereas a thicker and more differentiated epidermis was observed for the cellular spongy hydrogels. A switch from the inflammatory to the proliferative phase of wound healing was revealed for all the experimental groups 2 weeks after injury, but a significantly higher M2(CD163+)/M1(CD86+) subtype ratio was observed in the neurogenic preconditioned group that also failed to promote neoinnervation. A higher number of intraepidermal nerve fibers were observed for the unconditioned group probably due to a more controlled transition from the inflammatory to the proliferative phase. Overall, stem cell-containing spongy hydrogels represent a promising approach to enhance diabetic wound healing by positively impacting re-epithelialization and by modulating the inflammatory response to promote a successful neoinnervation.
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Affiliation(s)
- Lucília Pereira da Silva
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Tírcia Carlos Santos
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Daniel Barreira Rodrigues
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rogério Pedro Pirraco
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Mariana Teixeira Cerqueira
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui Luís Reis
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Vitor Manuel Correlo
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Alexandra Pinto Marques
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Barco, Taipas, Guimarães, Portugal; ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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149
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Brown MD, Schoenfisch MH. Nitric oxide permselectivity in electropolymerized films for sensing applications. ACS Sens 2016; 1:1453-1461. [PMID: 31875180 DOI: 10.1021/acssensors.6b00596] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The presence of biological interferents in physiological media necessitates chemical modification of the working electrode to facilitate accurate electrochemical measurement of nitric oxide (NO). In this study, we evaluated a series of self-terminating electropolymerized films prepared from one of three isomers of phenylenediamine (PD), phenol, eugenol, or 5-amino-1-naphthol (5A1N) to improve the NO selectivity of a platinum working electrode. The electrodeposition procedure for each monomer was individually optimized using cyclic voltammetry (CV) or constant potential amperometry (CPA). Cyclic voltammetry deposition parameters favoring slower film formation generally yielded films with improved selectivity for NO over nitrite and l-ascorbate. Nitric oxide sensors were fabricated and compared using the optimized deposition procedure for each monomer. Sensors prepared using poly-phenol and poly-5A1N film-modified platinum working electrodes demonstrated the most ideal analytical performance, with the former demonstrating the best selectivity. In simulated wound fluid, platinum electrodes modified with poly-5A1N films proved superior with respect to the NO sensitivity and detection limit.
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Affiliation(s)
- Micah D. Brown
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, North
Carolina 27599, United States
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, North
Carolina 27599, United States
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150
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Baliano AP, Pimentel EF, Buzin AR, Vieira TZ, Romão W, Tose LV, Lenz D, Andrade TUD, Fronza M, Kondratyuk TP, Endringer DC. Brown seaweed Padina gymnospora is a prominent natural wound-care product. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2016. [DOI: 10.1016/j.bjp.2016.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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