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Huang W, Xu P, Fu X, Yang J, Jing W, Cai Y, Zhou Y, Tao R, Yang Z. Functional molecule-mediated assembled copper nanozymes for diabetic wound healing. J Nanobiotechnology 2023; 21:294. [PMID: 37626334 PMCID: PMC10464099 DOI: 10.1186/s12951-023-02048-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
BACKGROUND The complex hyperglycemic, hypoxic, and reactive oxygen species microenvironment of diabetic wound leads to vascular defects and bacterial growth and current treatment options are relatively limited by their poor efficacy. RESULTS Herein, a functional molecule-mediated copper ions co-assembled strategy was constructed for collaborative treatment of diabetic wounds. Firstly, a functional small molecule 2,5-dimercaptoterephthalic acid (DCA) which has symmetrical carboxyl and sulfhydryl structure, was selected for the first time to assisted co-assembly of copper ions to produce multifunctional nanozymes (Cu-DCA NZs). Secondly, the Cu-DCA NZs have excellent multicatalytic activity, and photothermal response under 808 nm irradiation. In vitro and in vivo experiments showed that it not only could efficiently inhibit bacterial growth though photothermal therapy, but also could catalyze the conversion of intracellular hydrogen peroxide to oxygen which relieves wound hypoxia and improving inflammatory accumulation. More importantly, the slow release of copper ions could accelerate cellular proliferation, migration and angiogenesis, synergistically promote the healing of diabetic wound furtherly. CONCLUSIONS The above results indicate that this multifunctional nanozymes Cu-DCA NZs may be a potential nanotherapeutic strategy for diabetic wound healing.
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Affiliation(s)
- Wenyan Huang
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Ping Xu
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Xiaoxue Fu
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Jiaxin Yang
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Weihong Jing
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Yucen Cai
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Yingjuan Zhou
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Rui Tao
- Department of Hepatobiliary Surgery, Bishan hospital, Chongqing Medical University, Chongqing, 402760, China.
| | - Zhangyou Yang
- Chongqing Key Laboratory for Pharmaceutical Metabolism Research, Chongqing Pharmacodynamic Evaluation Engineering Technology Research Center, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China.
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Vasquez JM, Idrees A, Carmagnola I, Sigen A, McMahon S, Marlinghaus L, Ciardelli G, Greiser U, Tai H, Wang W, Salber J, Chiono V. In situ Forming Hyperbranched PEG-Thiolated Hyaluronic Acid Hydrogels With Honey-Mimetic Antibacterial Properties. Front Bioeng Biotechnol 2021; 9:742135. [PMID: 34869257 PMCID: PMC8637896 DOI: 10.3389/fbioe.2021.742135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/28/2021] [Indexed: 11/13/2022] Open
Abstract
The rapidly increasing resistance of bacteria to currently approved antibiotic drugs makes surgical interventions and the treatment of bacterial infections increasingly difficult. In recent years, complementary strategies to classical antibiotic therapy have, therefore, gained importance. One of these strategies is the use of medicinal honey in the treatment of bacterially colonized wounds. One of the several bactericidal effects of honey is based on the in situ generation of hydrogen peroxide through the activity of the enzyme glucose oxidase. The strategy underlying this work is to mimic this antibacterial redox effect of honey in an injectable, biocompatible, and rapidly forming hydrogel. The hydrogel was obtained by thiol–ene click reaction between hyperbranched polyethylene glycol diacrylate (HB PEGDA), synthesized using reversible addition-fragmentation chain transfer (RAFT) polymerization, and thiolated hyaluronic acid (HA-SH). After mixing 500 µL HB PEGDA (10%, w/w) and 500 µL HA-SH (1%, w/w) solutions, hydrogels formed in ∼60 s (HB PEGDA/HA-SH 10.0–1.0), as assessed by the tube inverting test. The HB PEGDA/HA-SH 10.0–1.0 hydrogel (200 µL) was resistant to in vitro dissolution in water for at least 64 days, absorbing up to 130 wt% of water. Varying glucose oxidase (GO) amounts (0–500 U/L) and constant glucose content (2.5 wt%) were loaded into HB PEGDA and HA-SH solutions, respectively, before hydrogel formation. Then, the release of H2O2 was evaluated through a colorimetric pertitanic acid assay. The GO content of 250 U/L was selected, allowing the formation of 10.8 ± 1.4 mmol H2O2/L hydrogel in 24 h, under static conditions. The cytocompatibility of HB PEGDA/HA-SH 10.0–1.0 hydrogels loaded with different GO activities (≤ 500 U/L) at a constant glucose amount (2.5 wt%) was investigated by in vitro assays at 24 h with L929 and HaCaT cell lines, according to DIN EN ISO 10993-5. The tests showed cytocompatibility for GO enzyme activity up to 250 U/L for both cell lines. The antibacterial activity of HB PEGDA/HA-SH 10.0–1.0 hydrogels loaded with increasing amounts of GO was demonstrated against various gram-positive bacteria (S. aureus and S. epidermidis), antibiotic-resistant gram-positive bacteria (MRSA and MRSE), gram-negative bacteria (P. aeruginosa, E. coli, and A. baumanii), and antibiotic-resistant gram-negative strains (P. aeruginosa and E. coli) using agar diffusion tests. For all gram-positive bacterial strains, increasing efficacy was measured with increasing GO activity. For the two P. aeruginosa strains, efficacy was shown only from an enzyme activity of 125 U/L and for E. coli and A. baumanii, efficacy was shown only from 250 U/L enzyme activity. HB PEGDA/HA-SH 10.0–1.0 hydrogels loaded with ≤250 U/L GO and 2.5 wt% glucose are promising formulations due to their fast-forming properties, cytocompatibility, and ability to produce antibacterial H2O2, warranting future investigations for bacterial infection treatment, such as wound care.
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Affiliation(s)
- Jeddah Marie Vasquez
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy.,Blafar Ltd., Dublin, Ireland.,Wenxin Wang Research Group, Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | - Ayesha Idrees
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy.,Department of Surgery, Universitätsklinikum Knappschaftskrankenhaus Bochum, Ruhr-University, Bochum, Germany
| | - Irene Carmagnola
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | - Aa Sigen
- Blafar Ltd., Dublin, Ireland.,Wenxin Wang Research Group, Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | - Sean McMahon
- Blafar Ltd., Dublin, Ireland.,Wenxin Wang Research Group, Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | | | - Gianluca Ciardelli
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | - Udo Greiser
- Wenxin Wang Research Group, Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | | | - Wenxin Wang
- Blafar Ltd., Dublin, Ireland.,Wenxin Wang Research Group, Charles Institute of Dermatology, University College Dublin, Dublin, Ireland
| | - Jochen Salber
- Department of Surgery, Universitätsklinikum Knappschaftskrankenhaus Bochum, Ruhr-University, Bochum, Germany
| | - Valeria Chiono
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
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He S, Liang C, Yi C, Wu M. Therapeutic effect of continuous diffusion of oxygen therapy combined with traditional moist wound dressing therapy in the treatment of diabetic foot ulcers. Diabetes Res Clin Pract 2021; 174:108743. [PMID: 33713718 DOI: 10.1016/j.diabres.2021.108743] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 01/13/2021] [Accepted: 03/02/2021] [Indexed: 11/16/2022]
Abstract
AIMS To investigate the therapeutic effect of continuous diffusion of oxygen (CDO) combined with traditional moist wound dressing (MWD) on the diabetic foot ulcers (DFUs) inpatients. METHODS The inpatients from May 2016 to April 2018 were enrolled and randomly divided into MWD, CDO and combination treatment groups (n = 40 each group). The moist dressing was used in the MWD group while a micro-oxygen supply device was used in the CDO group. The combination treatment group was given both MWD and CDO. All patients were treated for 8 weeks. The wound healing, amputation rate, and inflammatory control were evaluated. RESULTS Compared with MWD and CDO groups, the combination group showed a higher wound healing rate (P < 0.05), lower white blood cell count (P < 0.05) and lower high-sensitivity C-reactive protein level (P < 0.05). During 1-year follow-up, the amputation rate was 0% in combination group, which was significantly lower than that in other two groups (P < 0.05). CONCLUSIONS The combination of MWD and CDO was effective in promoting healing and preventing infection of DFUs, which holds a potential to be a new strategy for the treatment of this critical clinical condition.
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Affiliation(s)
- Shumin He
- Department of Wound Stoma Care Clinic, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong, China
| | - Caiyi Liang
- Department of Wound Stoma Care Clinic, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong, China
| | - Cailan Yi
- Department of Wound Stoma Care Clinic, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong, China
| | - Miaoli Wu
- Department of Wound Stoma Care Clinic, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, Guangdong, China.
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Xiao Y, Ahadian S, Radisic M. Biochemical and Biophysical Cues in Matrix Design for Chronic and Diabetic Wound Treatment. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:9-26. [PMID: 27405960 DOI: 10.1089/ten.teb.2016.0200] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Progress in biomaterial science and engineering and increasing knowledge in cell biology have enabled us to develop functional biomaterials providing appropriate biochemical and biophysical cues for tissue regeneration applications. Tissue regeneration is particularly important to treat chronic wounds of people with diabetes. Understanding and controlling the cellular microenvironment of the wound tissue are important to improve the wound healing process. In this study, we review different biochemical (e.g., growth factors, peptides, DNA, and RNA) and biophysical (e.g., topographical guidance, pressure, electrical stimulation, and pulsed electromagnetic field) cues providing a functional and instructive acellular matrix to heal diabetic chronic wounds. The biochemical and biophysical signals generally regulate cell-matrix interactions and cell behavior and function inducing the tissue regeneration for chronic wounds. Some technologies and devices have already been developed and used in the clinic employing biochemical and biophysical cues for wound healing applications. These technologies can be integrated with smart biomaterials to deliver therapeutic agents to the wound tissue in a precise and controllable manner. This review provides useful guidance in understanding molecular mechanisms and signals in the healing of diabetic chronic wounds and in designing instructive biomaterials to treat them.
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Affiliation(s)
- Yun Xiao
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Samad Ahadian
- 2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Milica Radisic
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
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Topical Administration of Oxygenated Hemoglobin Improved Wound Healing in an Ischemic Rabbit Ear Model. Plast Reconstr Surg 2016; 137:534-543. [PMID: 26818288 DOI: 10.1097/01.prs.0000475763.94203.52] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Localized oxygen deficiency plays a central role in the pathogenesis of chronic wounds; thus, rectifying localized ischemia with oxygen therapy has been postulated to be an integral aspect of the management of chronic wounds. The efficacy of a novel approach for oxygen therapy on chronic wound healing was evaluated. METHODS Oxygen was delivered to ischemic wounds by means of the topical application of oxygenated, chemically modified bovine hemoglobin (IKOR 2084) in a validated rabbit ear ischemic wound model. The wound healing was evaluated histologically by measuring epithelial gap and neo-granulation tissue area. In situ expression of endothelial cells (CD31) and proliferative cells (Ki-67) was examined by immunohistochemistry analysis. The mRNA of vascular endothelial growth factor, endothelial nitric oxide synthase, and matrix metalloproteinase-9 was quantified by real-time reverse-transcriptase polymerase chain reaction. The collagen was detected by Sirius red staining. RESULTS In comparison with topical application of saline, the administration of oxygenated IKOR 2084 increases wound reepithelialization and formation of neo-granulation tissue in a dose-dependent manner, and cellular proliferation (Ki-67). Conversely, the administration of deoxygenated IKOR 2084 aggravated the ischemic wound healing process. Moreover, the topical administration of oxygenated IKOR 2084 induces angiogenesis as evidenced by concomitant increases in CD31 protein and vascular endothelial growth factor and endothelial nitric oxide synthase mRNA expression in treated wounds. Oxygenated IKOR 2084 administration also increased collagen deposition in wounds, with decreases in the expression of matrix metalloproteinase-9 mRNA. CONCLUSION This study suggests that the topical application of oxygenated IKOR 2084 ameliorates the reparative progress of ischemic wounds through enhanced angiogenesis, cellular proliferation, and collagen deposition.
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Boateng J, Catanzano O. Advanced Therapeutic Dressings for Effective Wound Healing--A Review. J Pharm Sci 2015; 104:3653-3680. [PMID: 26308473 DOI: 10.1002/jps.24610] [Citation(s) in RCA: 487] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 12/15/2022]
Abstract
Advanced therapeutic dressings that take active part in wound healing to achieve rapid and complete healing of chronic wounds is of current research interest. There is a desire for novel strategies to achieve expeditious wound healing because of the enormous financial burden worldwide. This paper reviews the current state of wound healing and wound management products, with emphasis on the demand for more advanced forms of wound therapy and some of the current challenges and driving forces behind this demand. The paper reviews information mainly from peer-reviewed literature and other publicly available sources such as the US FDA. A major focus is the treatment of chronic wounds including amputations, diabetic and leg ulcers, pressure sores, and surgical and traumatic wounds (e.g., accidents and burns) where patient immunity is low and the risk of infections and complications are high. The main dressings include medicated moist dressings, tissue-engineered substitutes, biomaterials-based biological dressings, biological and naturally derived dressings, medicated sutures, and various combinations of the above classes. Finally, the review briefly discusses possible prospects of advanced wound healing including some of the emerging physical approaches such as hyperbaric oxygen, negative pressure wound therapy and laser wound healing, in routine clinical care.
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Affiliation(s)
- Joshua Boateng
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
| | - Ovidio Catanzano
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK
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Wu L, Norman G, Dumville JC, O'Meara S, Bell‐Syer SEM. Dressings for treating foot ulcers in people with diabetes: an overview of systematic reviews. Cochrane Database Syst Rev 2015; 2015:CD010471. [PMID: 26171906 PMCID: PMC7083265 DOI: 10.1002/14651858.cd010471.pub2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Foot ulcers in people with diabetes mellitus are a common and serious global health issue. Dressings form a key part of ulcer treatment, with clinicians and patients having many different types to choose from. A clear and current overview of current evidence is required to facilitate decision-making regarding dressing use. OBJECTIVES To summarize data from systematic reviews of randomised controlled trial evidence on the effectiveness of dressings for healing foot ulcers in people with diabetes mellitus (DM). METHODS We searched the following databases for relevant systematic reviews and associated analyses: the Cochrane Central Register of Controlled Trials (CENTRAL; The Cochrane Library 2015, Issue 2); Database of Abstracts of Reviews of Effects (DARE; The Cochrane Library 2015, Issue 1); Ovid MEDLINE (In-Process & Other Non-Indexed Citations, 14 April 2015); Ovid EMBASE (1980 to 14 April 2015). We also handsearched the Cochrane Wounds Group list of reviews. Two review authors independently performed study selection, risk of bias assessment and data extraction. Complete wound healing was the primary outcome assessed; secondary outcomes included health-related quality of life, adverse events, resource use and dressing performance. MAIN RESULTS We found 13 eligible systematic reviews relevant to this overview that contained a total of 17 relevant RCTs. One review reported the results of a network meta-analysis and so presented information on indirect, as well as direct, treatment effects. Collectively the reviews reported findings for 11 different comparisons supported by direct data and 26 comparisons supported by indirect data only. Only four comparisons informed by direct data found evidence of a difference in wound healing between dressing types, but the evidence was assessed as being of low or very low quality (in one case data could not be located and checked). There was also no robust evidence of a difference between dressing types for any secondary outcomes assessed. AUTHORS' CONCLUSIONS There is currently no robust evidence for differences between wound dressings for any outcome in foot ulcers in people with diabetes (treated in any setting). Practitioners may want to consider the unit cost of dressings, their management properties and patient preference when choosing dressings.
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Affiliation(s)
- Lihua Wu
- University of ManchesterSchool of Nursing, Midwifery and Social WorkJean McFarlane Buildung (Room 5.311), Oxford RoadManchesterUKM13 9PL
| | - Gill Norman
- University of ManchesterSchool of Nursing, Midwifery and Social WorkJean McFarlane Buildung (Room 5.311), Oxford RoadManchesterUKM13 9PL
| | - Jo C Dumville
- University of ManchesterSchool of Nursing, Midwifery and Social WorkJean McFarlane Buildung (Room 5.311), Oxford RoadManchesterUKM13 9PL
| | - Susan O'Meara
- University of LeedsSchool of HealthcareRoom LG.12, Baines WingLeedsUKLS2 9JT
| | - Sally EM Bell‐Syer
- University of YorkDepartment of Health SciencesArea 2 Seebohm Rowntree BuildingHeslingtonYorkNorth YorkshireUKYO10 5DD
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2H,3H-decafluoropentane-based nanodroplets: new perspectives for oxygen delivery to hypoxic cutaneous tissues. PLoS One 2015; 10:e0119769. [PMID: 25781463 PMCID: PMC4362938 DOI: 10.1371/journal.pone.0119769] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 01/16/2015] [Indexed: 01/20/2023] Open
Abstract
Perfluoropentane (PFP)-based oxygen-loaded nanobubbles (OLNBs) were previously proposed as adjuvant therapeutic tools for pathologies of different etiology sharing hypoxia as a common feature, including cancer, infection, and autoimmunity. Here we introduce a new platform of oxygen nanocarriers, based on 2H,3H-decafluoropentane (DFP) as core fluorocarbon. These new nanocarriers have been named oxygen-loaded nanodroplets (OLNDs) since DFP is liquid at body temperature, unlike gaseous PFP. Dextran-shelled OLNDs, available either in liquid or gel formulations, display spherical morphology, ~600 nm diameters, anionic charge, good oxygen carrying capacity, and no toxic effects on human keratinocytes after cell internalization. In vitro OLNDs result more effective in releasing oxygen to hypoxic environments than former OLNBs, as demonstrated by analysis through oxymetry. In vivo, OLNDs effectively enhance oxy-hemoglobin levels, as emerged from investigation by photoacoustic imaging. Interestingly, ultrasound (US) treatment further improves transdermal oxygen release from OLNDs. Taken together, these data suggest that US-activated, DFP-based OLNDs might be innovative, suitable and cost-effective devices to topically treat hypoxia-associated pathologies of the cutaneous tissues.
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Systemic administration of hemoglobin improves ischemic wound healing. J Surg Res 2014; 194:696-705. [PMID: 25617971 DOI: 10.1016/j.jss.2014.10.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 07/07/2014] [Accepted: 10/30/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND Oxygen plays multifaceted roles in wound healing, including effects on cell proliferation, collagen synthesis, angiogenesis, and bacterial killing. Oxygen deficit is a major factor in the pathogenesis of chronic wounds. MATERIALS AND METHODS We present a novel mechanism for oxygen delivery to ischemic wounds by systemic administration of an oxygen carrier substitute derived from bovine hemoglobin (IKOR 2084) in our ischemic rabbit ear wound model. The wound healing indexes, including epithelial gap and neo-granulation tissue area, were histologically analyzed. In situ expression of endothelial cells (CD31+) and proliferative cells (Ki-67+) were examined by immunohistochemistry analysis. The messenger RNA expression of collagen I, III, and vascular endothelial growth factor was measured by quantitative RT-PCR. Sirius Red staining was implemented for detection of collagen deposition, and terminal deoxynucleotidyl transferase dUTP nick end labeling analysis was performed to examine dermal cellular apoptosis. RESULTS Systemic administration of IKOR 2084 significantly improved oxygen tension of ischemic tissue. When compared with saline controls, IKOR 2084 treatment enhanced wound repair as demonstrated by a reduced epithelial gap and increased granulation tissue area. The expression of Ki-67+, CD31+, vascular endothelial growth factor and collagen was also enhanced by IKOR 2084 administration. Moreover, apoptosis analysis in the wounds showed that cell survival in the dermis was increased by systemic IKOR 2084 administration. CONCLUSIONS Our study suggests that systemic delivery of IKOR 2084 ameliorates hypoxic state, subsequently promotes angiogenesis, cellular proliferation, and collagen synthesis, attenuates hypoxia-induced apoptosis, and improved ischemic wound healing.
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Tuk B, Tong M, Fijneman EMG, van Neck JW. Hyperbaric oxygen therapy to treat diabetes impaired wound healing in rats. PLoS One 2014; 9:e108533. [PMID: 25329176 PMCID: PMC4198078 DOI: 10.1371/journal.pone.0108533] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 08/21/2014] [Indexed: 01/20/2023] Open
Abstract
Wound healing in diabetes is frequently impaired and its treatment remains a challenge. Hyperbaric oxygen therapy (HBOT) receives a wide attendance and is often used as a last resort treatment option, however, its effectiveness for many conditions is unproven. We tested the effect of HBOT on healing of diabetic ulcers in an animal experimental setting. Experimental diabetes was induced by intraperitoneal injection of streptozotocin. Four weeks after diabetes induction, rats were ulcerated by clamping a pair of magnet disks on the dorsal skin for 16 h. After magnet removal, the animals received HBOT, daily on weekdays, for 4 weeks. To examine the effect of HBOT on diabetes impaired wound healing, the degree of wound tissue perfusion, inflammation, angiogenesis, and tissue breaking strength were evaluated. HBOT effects on the degree of inflammation and number of blood vessels could not be observed. HBOT improved the tissue breaking strength of the wound, however, this did not reach statistical significance. Twenty hours after ending the HBOT, a significantly improved oxygen saturation of the hemoglobin at the venous end of the capillaries and the quantity of hemoglobin in the micro-blood vessels was measured.
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Affiliation(s)
- Bastiaan Tuk
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | - Miao Tong
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | - Esther M. G. Fijneman
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
| | - Johan W. van Neck
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
- * E-mail:
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A randomised trial to compare the performance of Oxyzyme® and Iodozyme® with standard care in the treatment of patients with venous and mixed venous/arterial ulceration. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.wndm.2014.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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