51
|
Sarioglu E, Arabacioglu Kocaaga B, Turan D, Batirel S, Guner FS. Theophylline‐loaded pectin‐based hydrogels. II. Effect of concentration of initial pectin solution, crosslinker type and cation concentration of external solution on drug release profile. J Appl Polym Sci 2019. [DOI: 10.1002/app.48155] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Ebru Sarioglu
- Department of Chemical EngineeringIstanbul Technical University Maslak, 34469 Istanbul Turkey
| | | | - Deniz Turan
- Department of Food EngineeringIstanbul Technical University Maslak, 34469 Istanbul Turkey
| | - Saime Batirel
- Department of Medical Biochemistry, School of MedicineMarmara University Maltepe, 34854 Istanbul Turkey
| | - F. Seniha Guner
- Department of Chemical EngineeringIstanbul Technical University Maslak, 34469 Istanbul Turkey
| |
Collapse
|
52
|
Papastergiou M, Chriti D, Damalas DE, Raptopoulos G, Paraskevopoulou P. Poly(urethane-acrylate) aerogels from the isocyanurate trimer of isophorone diisocyanate. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.02.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
53
|
Chenani M, Behnamghader A, Khorasani M, Ahmadinejad M. Evaluation of Hemostatic Behavior of Micro and Nano Gelatin/Silica Hybrid in Severe Bleeding. Curr Stem Cell Res Ther 2019; 14:169-176. [DOI: 10.2174/1574888x13666180703143856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 04/23/2018] [Accepted: 06/12/2018] [Indexed: 11/22/2022]
Abstract
Background:
The pH variation of the injury site is an important factor in the failure of styptic
and its structural damage. In this study, the behaviour of a gelatin-silica hybrid in severe bleeding was
evaluated under different pH values. On the other hand, the effect of the hybrid particle size, which is one
of the key physical properties of the hybrid, has been studied in rapid control of haemostasis.
</P><P>
Method: The hybrid haemostatic behaviour varied drastically by changing the particle size, so that the
hybrid containing SiO2 with the average particle size of about 1 micro-meter (Hyb Gel-MSiO2) demonstrated
very poor ability in platelet adhesion in neutral pH, about 24%. Also, the aPTT was not
shorter than the normal time, whereas reduction of the particle size beyond a certain limit (with nanometer
SiO2 for Hyb Gel-NSiO2) led to both increasing platelet adhesion to 32% and very considerable
reduction of aPTT.
</P><P>
Results: Alignment of all results showed that the particle size reduction improves the haemostatic
behaviour of the hybrid toward its best performance by controlling excessive bleeding. By changing
the pH for a certain particle size, structural integrity, and thereby the hybrid haemostatic behaviour
changed dramatically. Therefore, the nano-hybrid showed the most blood absorption (around 470%) in
natural pH and acceded to a coherent structure. The results demonstrated that in alkaline or acidic
environment, the hybrid haemostatic behaviour was limited. Based on the results of this study, it was
found that changes in the hybrid behaviour in acidic pH were much more drastic than in alkaline pH,
and also the hybrid with the optimum particle size (Hyb Gel-NSiO2) can maintain the structural integrity
with rapid haemostasis (<3 seconds).
</P><P>
Conclusion: Based on the objective that the pH at the injury site change to the alkaline side, the resulting
hybrid has an excellent ability to control excessive bleeding and can be proposed for further in
vivo studies as a novel styptic.</P>
Collapse
Affiliation(s)
- M. Chenani
- Biomaterials Group, Department of Medical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - A. Behnamghader
- Biomaterials Group, Department of Nanotechnology and Advanced Materials, Materials & Energy Research Center, Karaj, Iran
| | - M. Khorasani
- Department of Biomaterial, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box:14965, Tehran, Iran
| | - M. Ahmadinejad
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| |
Collapse
|
54
|
Gupta A, Kowalczuk M, Heaselgrave W, Britland ST, Martin C, Radecka I. The production and application of hydrogels for wound management: A review. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.019] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
55
|
Hsu YY, Liu KL, Yeh HH, Lin HR, Wu HL, Tsai JC. Sustained release of recombinant thrombomodulin from cross-linked gelatin/hyaluronic acid hydrogels potentiate wound healing in diabetic mice. Eur J Pharm Biopharm 2019; 135:61-71. [DOI: 10.1016/j.ejpb.2018.12.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/11/2018] [Accepted: 12/11/2018] [Indexed: 10/27/2022]
|
56
|
Memic A, Abudula T, Mohammed HS, Joshi Navare K, Colombani T, Bencherif SA. Latest Progress in Electrospun Nanofibers for Wound Healing Applications. ACS APPLIED BIO MATERIALS 2019; 2:952-969. [DOI: 10.1021/acsabm.8b00637] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Adnan Memic
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Tuerdimaimaiti Abudula
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Halimatu S. Mohammed
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Kasturi Joshi Navare
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Thibault Colombani
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | - Sidi A. Bencherif
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
- Department of Bioengineering, Northeastern University, Boston, Massachusetts 02120, United States
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
- Sorbonne University, UTC CNTS UMR 7338, Biomechanics and Bioengineering, University of Technology of Compiegne, 60203 Compiegne, Cedex, France
| |
Collapse
|
57
|
Kumar S, Marrero-Berrios I, Kabat M, Berthiaume F. Recent Advances in the Use of Algal Polysaccharides for Skin Wound Healing. Curr Pharm Des 2019; 25:1236-1248. [PMID: 31109271 PMCID: PMC7746437 DOI: 10.2174/1381612825666190521120051] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 04/30/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Chronic skin wounds and pressure ulcers represent major health care problems in diabetic individuals, as well as patients who suffered a spinal cord injury. Current treatment methods are only partially effective and such wounds exhibit a high recurrence rate. Open wounds are at high risk of invasive wound infections, which can lead to amputation and further disability. An interdisciplinary approach is needed to develop new and more effective therapies. METHODS The purpose of this work is to review recent studies focusing on the use of algal polysaccharides in commercially available as well as experimental wound dressings. Studies that discuss wound dressings based on algal polysaccharides, some of which also contain growth factors and even living cells, were identified and included in this review. RESULTS AND CONCLUSION Algal polysaccharides possess mechanical and physical properties, along with excellent biocompatibility and biodegradability that make them suitable for a variety of applications as wound dressings. Furthermore, algal polysaccharides have been used for a dual purpose, namely as wound covering, but also as a vehicle for drug delivery to the wound site.
Collapse
Affiliation(s)
| | | | - Maciej Kabat
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854, USA
| | - Francois Berthiaume
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854, USA
| |
Collapse
|
58
|
Aljghami ME, Saboor S, Amini-Nik S. Emerging Innovative Wound Dressings. Ann Biomed Eng 2018; 47:659-675. [DOI: 10.1007/s10439-018-02186-w] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 12/07/2018] [Indexed: 12/11/2022]
|
59
|
Stefanov I, Hinojosa-Caballero D, Maspoch S, Hoyo J, Tzanov T. Enzymatic synthesis of a thiolated chitosan-based wound dressing crosslinked with chicoric acid. J Mater Chem B 2018; 6:7943-7953. [PMID: 32255040 DOI: 10.1039/c8tb02483a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work describes the enzymatic synthesis of multifunctional hydrogels for chronic wound treatment using thiolated chitosan and the natural polyphenol chicoric acid. Gelation was achieved by laccase-catalyzed oxidation of chicoric acid, a natural compound used for the first time as a homobifunctional crosslinker, reacting subsequently with nucleophilic thiol and amino groups from the chitosan derivative. This approach allowed for twice as fast gelation at a three-fold reduced crosslinking reagent concentration, compared to reported enzymatic synthesis of hydrogels using gallic acid as a phenolic provider. Hydrogels with 600% swelling capacity, coupled with only 20% weight loss after 6 days under physiological conditions, were obtained. The clinically relevant Gram-positive Staphylococcus aureus and the Gram-negative Pseudomonas aeruginosa were reduced by up to 4.5 and 5.5 logs, respectively. A tunable, in the range of 20-95%, ex vivo inhibition of myeloperoxidase (MPO) activity in chronic wound exudate was achieved, together with control over the total matrix metalloproteinase (MMP) activities.
Collapse
Affiliation(s)
- Ivaylo Stefanov
- Grup de Biotecnologia Molecular i Industrial (GBMI), Department of Chemical Engineering, Universitat Politècnica de Catalunya - (UPC), Rambla Sant Nebridi, 22, 08222 Terrassa, Barcelona, Spain.
| | | | | | | | | |
Collapse
|
60
|
Güner OZ, Cam C, Arabacioglu-Kocaaga B, Batirel S, Güner FS. Theophylline-loaded pectin-based hydrogels. I. Effect of medium pH and preparation conditions on drug release profile. J Appl Polym Sci 2018. [DOI: 10.1002/app.46731] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ozde Zeynep Güner
- Department of Chemical Engineering; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| | - Cansu Cam
- Department of Chemical Engineering; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| | | | - Saime Batirel
- Department of Medical Biochemistry, School of Medicine; Marmara University; Maltepe Istanbul 34854 Turkey
| | - F. Seniha Güner
- Department of Chemical Engineering; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| |
Collapse
|
61
|
Kucinska-Lipka J, Gubanska I, Lewandowska A, Terebieniec A, Przybytek A, Cieśliński H. Antibacterial polyurethanes, modified with cinnamaldehyde, as potential materials for fabrication of wound dressings. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2512-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
62
|
Braunberger TL, Fatima S, Vellaichamy G, Nahhas AF, Parks-Miller A, Hamzavi IH. Dress for Success: a Review of Dressings and Wound Care in Hidradenitis Suppurativa. CURRENT DERMATOLOGY REPORTS 2018. [DOI: 10.1007/s13671-018-0231-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
63
|
Sousa MP, Neto AI, Correia TR, Miguel SP, Matsusaki M, Correia IJ, Mano JF. Bioinspired multilayer membranes as potential adhesive patches for skin wound healing. Biomater Sci 2018; 6:1962-1975. [PMID: 29850674 PMCID: PMC6420149 DOI: 10.1039/c8bm00319j] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bioinspired and adhesive multilayer membranes are produced using the layer-by-layer (LbL) assembly of chitosan (CHT), alginate (ALG) and hyaluronic acid modified with dopamine (HA-DN). Freestanding multilayer membranes without DN are also produced as a control. The success of the synthesis of HA-DN was confirmed using UV-visible spectroscopy. Scanning electron microscopy images indicate that the surface of the DN-containing membranes is more porous than the control ones; they also present a higher average thickness value for the same number of CHT/ALG/CHT/HA(-DN) tetralayers (n = 100). Also, water uptake, mechanical strength and adhesion are enhanced with the introduction of DN moieties along the nano-layers. Besides, human dermal fibroblast viability, enhanced adhesion and proliferation were confirmed by immunofluorescence assays and by measuring both the metabolic activity and DNA content. Moreover, in vivo assays with such kinds of DN-containing multilayer membranes were performed; the application of these membranes in the treatment of dermal wounds induced in Wistar rats results in the highest decrease of inflammation of rat skin, compared with the control conditions. Overall, this investigation suggests that these mussel-inspired freestanding multilayer membranes may enhance either their mechanical performance or cellular adhesion and proliferation, leading to an improved wound healing process, being a promising material to restore the structural and functional properties of wounded skin.
Collapse
Affiliation(s)
- Maria P Sousa
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | | | | | | | | | | | | |
Collapse
|
64
|
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.
Collapse
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
| |
Collapse
|
65
|
|
66
|
Electrospun Antimicrobial Wound Dressings: Novel Strategies to Fight Against Wound Infections. CHRONIC WOUNDS, WOUND DRESSINGS AND WOUND HEALING 2018. [DOI: 10.1007/15695_2018_133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
67
|
Optimization of Phenolic Compounds Extraction from Flax Shives and Their Effect on Human Fibroblasts. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:3526392. [PMID: 29292398 PMCID: PMC5674500 DOI: 10.1155/2017/3526392] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/18/2017] [Accepted: 09/05/2017] [Indexed: 11/17/2022]
Abstract
The goal of this study was to evaluate the most effective technique for extraction of phenolics present in flax shives and to assess their effect on human fibroblasts. Flax shives are by-products of fibre separation, but they were found to be a rich source of phenolic compounds and thus might have application potential. It was found that the optimal procedure for extraction of phenolics was hydrolysis enhanced by the ultrasound with NaOH for 24 h at 65°C and subsequent extraction with ethyl acetate. The influence of the flax shives extract on fibroblast growth and viability was assessed using the MTT and SRB tests. Moreover, the influence of flax shives extract on the extracellular matrix remodelling process was verified. The 20% increase of the viability was observed upon flax shives extract treatment and the decrease of mRNA collagen genes, an increase of matrix metalloproteinase gene expression, and reduction in levels of interleukin 6, interleukin 10, and suppressor of cytokinin signaling 1 mRNA were observed. Alterations in MCP-1 mRNA levels were dependent on flax shives extract concentration. Thus, we suggested the possible application of flax shives extract in the wound healing process.
Collapse
|
68
|
Fontenot KR, Edwards JV, Haldane D, Pircher N, Liebner F, Condon BD, Qureshi H, Yager D. Designing cellulosic and nanocellulosic sensors for interface with a protease sequestrant wound-dressing prototype: Implications of material selection for dressing and protease sensor design. J Biomater Appl 2017; 32:622-637. [DOI: 10.1177/0885328217735049] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Interfacing nanocellulosic-based biosensors with chronic wound dressings for protease point of care diagnostics combines functional material properties of high specific surface area, appropriate surface charge, and hydrophilicity with biocompatibility to the wound environment. Combining a protease sensor with a dressing is consistent with the concept of an intelligent dressing, which has been a goal of wound-dressing design for more than a quarter century. We present here biosensors with a nanocellulosic transducer surface (nanocrystals, nanocellulose composites, and nanocellulosic aerogels) immobilized with a fluorescent elastase tripeptide or tetrapeptide biomolecule, which has selectivity and affinity for human neutrophil elastase present in chronic wound fluid. The specific surface area of the materials correlates with a greater loading of the elastase peptide substrate. Nitrogen adsorption and mercury intrusion studies revealed gas permeable systems with different porosities (28–98%) and pore sizes (2–50 nm, 210 µm) respectively, which influence water vapor transmission rates. A correlation between zeta potential values and the degree of protease sequestration imply that the greater the negative surface charge of the nanomaterials, the greater the sequestration of positively charged neutrophil proteases. The biosensors gave detection sensitivities of 0.015–0.13 units/ml, which are at detectable human neutrophil elastase levels present in chronic wound fluid. Thus, the physical and interactive biochemical properties of the nano-based biosensors are suitable for interfacing with protease sequestrant prototype wound dressings. A discussion of the relevance of protease sensors and cellulose nanomaterials to current chronic wound dressing design and technology is included.
Collapse
Affiliation(s)
| | | | | | - Nicole Pircher
- University of Natural Resources and Life Sciences, Vienna, Austria
| | - Falk Liebner
- University of Natural Resources and Life Sciences, Vienna, Austria
| | - Brian D Condon
- Southern Regional Research Center, USDA, New Orleans, LA, USA
| | - Huzaifah Qureshi
- Plastic and Reconstructive Surgery, Virginia Commonwealth University, Richmond, VA, USA
| | - Dorne Yager
- Plastic and Reconstructive Surgery, Virginia Commonwealth University, Richmond, VA, USA
| |
Collapse
|
69
|
Song Y, Zeng R, Hu L, Maffucci KG, Ren X, Qu Y. In vivo wound healing and in vitro antioxidant activities of Bletilla striata phenolic extracts. Biomed Pharmacother 2017; 93:451-461. [DOI: 10.1016/j.biopha.2017.06.079] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/16/2017] [Accepted: 06/20/2017] [Indexed: 10/19/2022] Open
|
70
|
Stana J, Stergar J, Gradišnik L, Flis V, Kargl R, Fröhlich E, Stana Kleinschek K, Mohan T, Maver U. Multilayered Polysaccharide Nanofilms for Controlled Delivery of Pentoxifylline and Possible Treatment of Chronic Venous Ulceration. Biomacromolecules 2017; 18:2732-2746. [DOI: 10.1021/acs.biomac.7b00523] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jan Stana
- Schön Klinik Vogtareuth, Department of Vascular
and Endovascular Surgery, Krankenhausstraße 20, 83569 Vogtareuth, Germany
| | - Janja Stergar
- University of Maribor, Faculty of Medicine, Institute
of Biomedical Sciences, Taborska ulica 8, SI-2000 Maribor, Slovenia
| | - Lidija Gradišnik
- University of Maribor, Faculty of Medicine, Institute
of Biomedical Sciences, Taborska ulica 8, SI-2000 Maribor, Slovenia
| | - Vojko Flis
- University Medical Centre Maribor, Division of Surgery,
Department of Vascular Surgery, Ljubljanka ulica 5, SI-2000 Maribor, Slovenia
| | - Rupert Kargl
- University of Maribor, Faculty of Mechanical Engineering,
Laboratory for Characterisation and Processing of Polymers, Smetanova 17, SI-2000 Maribor, Slovenia
| | - Eleonore Fröhlich
- Medical University of Graz, Center for Medical Research,
Core Facility Microscopy, Stiftingtalstraße 24, 8010 Graz, Austria
| | - Karin Stana Kleinschek
- University of Maribor, Faculty of Mechanical Engineering,
Laboratory for Characterisation and Processing of Polymers, Smetanova 17, SI-2000 Maribor, Slovenia
| | - Tamilselvan Mohan
- University of Graz, Institute of Chemistry, Heinrichstrasse 28, 8010 Graz, Austria
| | - Uroš Maver
- University of Maribor, Faculty of Medicine, Institute
of Biomedical Sciences, Taborska ulica 8, SI-2000 Maribor, Slovenia
- University of Maribor, Faculty of Medicine, Department
of Pharmacology, Taborska
ulica 8, SI-2000 Maribor, Slovenia
| |
Collapse
|
71
|
Rahmani Del Bakhshayesh A, Annabi N, Khalilov R, Akbarzadeh A, Samiei M, Alizadeh E, Alizadeh-Ghodsi M, Davaran S, Montaseri A. Recent advances on biomedical applications of scaffolds in wound healing and dermal tissue engineering. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:691-705. [PMID: 28697631 DOI: 10.1080/21691401.2017.1349778] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The tissue engineering field has developed in response to the shortcomings related to the replacement of the tissues lost to disease or trauma: donor tissue rejection, chronic inflammation and donor tissue shortages. The driving force behind the tissue engineering is to avoid the mentioned issues by creating the biological substitutes capable of replacing the damaged tissue. This is done by combining the scaffolds, cells and signals in order to create the living, physiological, three-dimensional tissues. A wide variety of skin substitutes are used in the treatment of full-thickness injuries. Substitutes made from skin can harbour the latent viruses, and artificial skin grafts can heal with the extensive scarring, failing to regenerate structures such as glands, nerves and hair follicles. New and practical skin scaffold materials remain to be developed. The current article describes the important information about wound healing scaffolds. The scaffold types which were used in these fields were classified according to the accepted guideline of the biological medicine. Moreover, the present article gave the brief overview on the fundamentals of the tissue engineering, biodegradable polymer properties and their application in skin wound healing. Also, the present review discusses the type of the tissue engineered skin substitutes and modern wound dressings which promote the wound healing.
Collapse
Affiliation(s)
- Azizeh Rahmani Del Bakhshayesh
- a Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran.,b Student Research Committee , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Nasim Annabi
- c Biomaterials Innovation Research Center, Brigham and Women's Hospital , Harvard Medical School , Cambridge , MA , USA.,d Harvard-MIT Division of Health Sciences and Technology , Massachusetts Institute of Technology , Cambridge , MA , USA.,e Department of Chemical Engineering , Northeastern University , Boston , MA , USA
| | - Rovshan Khalilov
- f Institute of Radiation Problems , National Academy of Sciences of Azerbaijan , Baku , Azerbaijan
| | - Abolfazl Akbarzadeh
- g Stem Cell Research Center , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mohammad Samiei
- a Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran.,h Department of Endodontics, Faculty of Dentistry , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Effat Alizadeh
- i Drug Applied Research Center , Tabriz University of Medical Sciences , Tabriz , Iran
| | | | - Soodabeh Davaran
- i Drug Applied Research Center , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Azadeh Montaseri
- j Department of Anatomical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran
| |
Collapse
|
72
|
Modeling the Construct of an Expert Evidence-Adaptive Knowledge Base for a Pressure Injury Clinical Decision Support System. INFORMATICS 2017. [DOI: 10.3390/informatics4030020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
73
|
Skórkowska-Telichowska K, Kulma A, Gębarowski T, Wojtasik W, Kostyn K, Moreira H, Szyjka A, Boba A, Preisner M, Mierziak J, Arendt M, Kostyn A, Szatkowski M, Szopa J, Gąsiorowski K. V79 Fibroblasts Are Protected Against Reactive Oxygen Species by Flax Fabric. Appl Biochem Biotechnol 2017; 184:366-385. [PMID: 28689336 DOI: 10.1007/s12010-017-2552-y] [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: 04/11/2017] [Accepted: 06/27/2017] [Indexed: 01/22/2023]
Abstract
Chinese hamster pulmonary fibroblasts (V79 cells) pre-treated with flax fabrics derived from non-modified or genetically engineered flax fibres and treated with H2O2 revealed a markedly lower level of intracellular reactive oxygen species (ROS) than control, non-pre-treated cells. The fabrics were prepared from fibres derived from two kinds of transgenic plants: W92 plants, which overproduce flavonoids, and M type plants, which produce hydroxybutyrate polymer in their vascular bundles and thus in fibres. Incubating the V79 cells with the flax fabrics prior to H2O2 treatment also reduced the amount of DNA damage, as established using the comet assay (also known as alkaline single-cell gel electrophoresis) and pulsed-field electrophoresis of intact cellular DNA. Selected gene expression analysis revealed the activator impact of fabrics on the apoptotic (BCL2 family, caspases) gene expression. This promoting activity was also detected for histone acetyltransferase (HAT; MYST2) gene expression. The flax fabric derived from both GM flax plants exhibited a protective effect against oxidative stress and ROS-mediated genotoxic damage, but the W92 fabric was the strongest. It is thus suggested that these fabrics might be useful as a basis for new biomedical products (e.g. wound dressings) that actively protect cells against inflammation and degeneration.
Collapse
Affiliation(s)
- Katarzyna Skórkowska-Telichowska
- Angiology Department, Regional Specialist Hospital in Wroclaw, Research and Development Centre, Kamienskiego 73a St, 51-124, Wroclaw, Poland
| | - Anna Kulma
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Tomasz Gębarowski
- Department of Basic Medical Sciences, Wroclaw Medical University, Wroclaw, Poland
| | - Wioleta Wojtasik
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Kamil Kostyn
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland.
| | - Helena Moreira
- Department of Basic Medical Sciences, Wroclaw Medical University, Wroclaw, Poland
| | - Anna Szyjka
- Department of Basic Medical Sciences, Wroclaw Medical University, Wroclaw, Poland
| | - Aleksandra Boba
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Marta Preisner
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Justyna Mierziak
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Malgorzata Arendt
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Anna Kostyn
- Institute of Genetics and Microbiology, University of Wroclaw, Przybyszewskiego 63/77, 51-148, Wroclaw, Poland
| | - Michał Szatkowski
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland
| | - Jan Szopa
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63, 51-137, Wroclaw, Poland.,Department of Genetics, Plant Breeding and Seed Production, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | | |
Collapse
|
74
|
Bombaldi de Souza RF, Bombaldi de Souza FC, Moraes ÂM. Analysis of the performance of polysaccharide membranes in aqueous media as a tool to assist wound-dressing selection. J Appl Polym Sci 2017. [DOI: 10.1002/app.45386] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Renata Francielle Bombaldi de Souza
- Department of Engineering of Materials and of Bioprocesses; School of Chemical Engineering, University of Campinas; Avenida Albert Einstein 500 Campinas São Paulo - CEP 13083-852 Brazil
| | - Fernanda Carla Bombaldi de Souza
- Department of Engineering of Materials and of Bioprocesses; School of Chemical Engineering, University of Campinas; Avenida Albert Einstein 500 Campinas São Paulo - CEP 13083-852 Brazil
| | - Ângela Maria Moraes
- Department of Engineering of Materials and of Bioprocesses; School of Chemical Engineering, University of Campinas; Avenida Albert Einstein 500 Campinas São Paulo - CEP 13083-852 Brazil
| |
Collapse
|
75
|
Gredes T, Schönitz S, Gedrange T, Stepien L, Kozak K, Kunert-Keil C. In vivo analysis of covering materials composed of biodegradable polymers enriched with flax fibers. Biomater Res 2017; 21:8. [PMID: 28529764 PMCID: PMC5437395 DOI: 10.1186/s40824-017-0094-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 05/11/2017] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The objective of this study was to investigate the in vivo effect of bioactive composites with poly(lactic acid) (PLA) or polycaprolactone (PCL) as the matrix, reinforced with bioplastic flax fibers, on the surrounding muscle tissue. METHODS Materials of pure PLA and PCL and their composites with flax fibers from genetically modified plants producing poly-3-hydroxybutyrate (PLA-transgen, PCL-transgen) and unmodified plants (PLA-wt, PCL-wt) were placed subcutaneous on the M. latissimus dorsi for four weeks. RESULTS The analysis of histological samples revealed that every tested material was differently encapsulated and the capsule thickness is much more pronounced when using the PCL composites in comparison with the PLA composites. The encapsulation by connective tissue was significantly reduced around PCL-transgen and significantly increased in the cases of PLA-transgen and PLA-wt. In the collected muscle samples, the measured protein expression of CD45, lymphocyte common antigen, was significantly increased after the use of all tested materials, with the exception of pure PCL. In contrast, the protein expression of caveolin-1 remained unchanged after treatment with the most examined materials. Only after insertion of PLA-wt, a significant increase of caveolin-1 protein expression was detected, due to the improved neovascularization. CONCLUSION These data support the presumption that the new bioactive composites are biocompatible and they could be applicable in the medical field to support the regenerative processes.
Collapse
Affiliation(s)
- Tomasz Gredes
- Department of Orthodontics, Carl Gustav Carus Campus, Technische Universität Dresden, Fetscherstr. 74, D-01307 Dresden, Germany
| | - Sandra Schönitz
- Department of Orthodontics, Carl Gustav Carus Campus, Technische Universität Dresden, Fetscherstr. 74, D-01307 Dresden, Germany
| | - Tomasz Gedrange
- Department of Orthodontics, Carl Gustav Carus Campus, Technische Universität Dresden, Fetscherstr. 74, D-01307 Dresden, Germany
| | - Lukas Stepien
- Fraunhofer IWS, Winterbergstr. 28, D-01277 Dresden, Germany
| | - Karol Kozak
- Clinic for Neurology, Carl Gustav Carus Campus, Technische Universität Dresden, Fetscherstr. 74, D-01307 Dresden, Germany
- Fraunhofer IWS, Winterbergstr. 28, D-01277 Dresden, Germany
| | - Christiane Kunert-Keil
- Department of Orthodontics, Carl Gustav Carus Campus, Technische Universität Dresden, Fetscherstr. 74, D-01307 Dresden, Germany
| |
Collapse
|
76
|
Felgueiras HP, Amorim MTP. Functionalization of electrospun polymeric wound dressings with antimicrobial peptides. Colloids Surf B Biointerfaces 2017; 156:133-148. [PMID: 28527357 DOI: 10.1016/j.colsurfb.2017.05.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/28/2017] [Accepted: 05/01/2017] [Indexed: 12/31/2022]
Abstract
Wound dressings have evolved considerably since ancient times. Modern dressings are now important systems that combine the physical and biochemical properties of natural and synthetic polymers with active compounds that are beneficial to wound healing. Antimicrobial peptides (AMPs) are the most recent addition to these systems. These aim to control the microbial proliferation and colonization of pathogens and to modulate the host's immune response. In the last decade, electrospun wound dressings have been extensively studied and the electrospinning technique recognized as an efficient approach for the production of nanoscale fibrous mats. The control of the electrospinning processing parameters, the selection of the polymer and AMPs, and the definition of the most appropriate AMPs' functionalization method contribute to the successful treatment of acute and chronic wounds. Although the use of electrospinning in wound dressings' production has been previously reviewed, the increased development of AMPs and the establishment of functionalization methods for wound dressings over recent years has increased the need for such research. In the present review, we approach all these subjects and reveal the promising therapeutic potential of wound dressings functionalized with AMPs.
Collapse
Affiliation(s)
- Helena P Felgueiras
- 2C2T, Centre for Science and Textile Technology, Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
| | - M Teresa P Amorim
- 2C2T, Centre for Science and Textile Technology, Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal
| |
Collapse
|
77
|
Schröder HC, Tolba E, Diehl-Seifert B, Wang X, Müller WEG. Electrospinning of Bioactive Wound-Healing Nets. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2017; 55:259-290. [PMID: 28238041 DOI: 10.1007/978-3-319-51284-6_8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The availability of appropriate dressings for treatment of wounds, in particular chronic wounds, is a task that still awaits better solutions than provided by currently applied materials. The method of electrospinning enables the fabrication of novel materials for wound dressings due to the high surface area and porosity of the electrospun meshes and the possibility to include bioactive ingredients. Recent results show that the incorporation of biologically active inorganic polyphosphate microparticles and microspheres and synergistically acting retinoids into electrospun polymer fibers yields biocompatible and antibacterial mats for potential dressings with improved wound-healing properties. The underlying principles and the mechanism of these new approaches in the therapy wounds, in particular wounds showing impaired healing, as well as for further applications in skin regeneration/repair, are summarized.
Collapse
Affiliation(s)
- Heinz C Schröder
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany.
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany.
| | - Emad Tolba
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
| | - Bärbel Diehl-Seifert
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany
| | - Xiaohong Wang
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany
| | - Werner E G Müller
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany.
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany.
| |
Collapse
|
78
|
Pott FS, Meier MJ, Stocco JGD, Crozeta K, Ribas JD. The effectiveness of hydrocolloid dressings versus other dressings in the healing of pressure ulcers in adults and older adults: a systematic review and meta-analysis. Rev Lat Am Enfermagem 2016; 22:511-20. [PMID: 25029065 PMCID: PMC4292618 DOI: 10.1590/0104-1169.3480.2445] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 03/31/2014] [Indexed: 12/02/2022] Open
Abstract
Objective to evaluate the effectiveness of hydrocolloids in the healing of pressure
ulcers in adult and older adult patients. Method systematic review with meta-analysis, based on the recommendations of the
Cochrane Handbook. The search was undertaken in the databases: Medical
Literature Analysis and Retrieval System Online, Latin American and
Caribbean Health Sciences Literature (LILACS), Cochrane Database, Cumulative
Index to Nursing and Allied Health Literature, Web of Science and the
Scientific Electronic Library Online. Results 646 primary studies were identified, 69 were evaluated and nine were
selected, referring to the use of the hydrocolloid dressing in healing; of
these, four studies allowed meta-analysis. There was no statistically
significant difference between the hydrocolloid group and the foams group (p
value=0.84; Odds Ratio 1.06, CI 95% 0.61-1.86). A slight superiority of the
polyurethane dressings was observed in relation to the hydrocolloid
dressings. Conclusion the evidence is not sufficient to affirm whether the efficacy of
hydrocolloid dressings is superior to that of other dressings. It is
suggested that clinical randomized trials be undertaken so as to ascertain
the efficacy of this intervention in the healing of pressure ulcers, in
relation to other treatments.
Collapse
Affiliation(s)
| | | | | | - Karla Crozeta
- Universidade Federal do Paraná, Curitiba, PR, Brazil
| | | |
Collapse
|
79
|
Zelga PJ, Górnicz MM, Głuszkiewicz JM, Piasecka-Zelga J. Outcomes of acute dermal irritation and sensitisation tests on active dressings for chronic wounds: a comparative study. J Wound Care 2016; 25:722-729. [DOI: 10.12968/jowc.2016.25.12.722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- P. J. Zelga
- Medical University of Lodz, Department of General and Colorectal Surgery, Pl. Hallera 1, 91-647 Lodz, Poland
| | - M. M. Górnicz
- Institute of Occupational Medicine, Research Laboratory for Medicine and Veterinary Products in the GMP Head of Research Laboratory for Medicine and Veterinary Products
| | - J. M. Głuszkiewicz
- Institute of Occupational Medicine, Research Laboratory for Medicine and Veterinary Products in the GMP Head of Research Laboratory for Medicine and Veterinary Products
| | - J. Piasecka-Zelga
- Institute of Occupational Medicine, Research Laboratory for Medicine and Veterinary Products in the GMP Head of Research Laboratory for Medicine and Veterinary Products
| |
Collapse
|
80
|
Chen CK, Huang SC. Preparation of Reductant–Responsive N-Maleoyl-Functional Chitosan/Poly(vinyl alcohol) Nanofibers for Drug Delivery. Mol Pharm 2016; 13:4152-4167. [DOI: 10.1021/acs.molpharmaceut.6b00758] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chih-Kuang Chen
- Polymeric Biomaterials Laboratory, Department
of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan, R.O.C
| | - Szu-Chieh Huang
- Polymeric Biomaterials Laboratory, Department
of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan, R.O.C
| |
Collapse
|
81
|
Li Z, Lang G, Chen X, Sacks H, Mantzur C, Tropp U, Mader KT, Smallwood TC, Sammon C, Richards RG, Alini M, Grad S. Polyurethane scaffold with in situ swelling capacity for nucleus pulposus replacement. Biomaterials 2016; 84:196-209. [DOI: 10.1016/j.biomaterials.2016.01.040] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 01/15/2016] [Accepted: 01/19/2016] [Indexed: 12/18/2022]
|
82
|
Działo M, Mierziak J, Korzun U, Preisner M, Szopa J, Kulma A. The Potential of Plant Phenolics in Prevention and Therapy of Skin Disorders. Int J Mol Sci 2016; 17:160. [PMID: 26901191 PMCID: PMC4783894 DOI: 10.3390/ijms17020160] [Citation(s) in RCA: 312] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/05/2016] [Accepted: 01/14/2016] [Indexed: 12/14/2022] Open
Abstract
Phenolic compounds constitute a group of secondary metabolites which have important functions in plants. Besides the beneficial effects on the plant host, phenolic metabolites (polyphenols) exhibit a series of biological properties that influence the human in a health-promoting manner. Evidence suggests that people can benefit from plant phenolics obtained either by the diet or through skin application, because they can alleviate symptoms and inhibit the development of various skin disorders. Due to their natural origin and low toxicity, phenolic compounds are a promising tool in eliminating the causes and effects of skin aging, skin diseases, and skin damage, including wounds and burns. Polyphenols also act protectively and help prevent or attenuate the progression of certain skin disorders, both embarrassing minor problems (e.g., wrinkles, acne) or serious, potentially life-threatening diseases such as cancer. This paper reviews the latest reports on the potential therapy of skin disorders through treatment with phenolic compounds, considering mostly a single specific compound or a combination of compounds in a plant extract.
Collapse
Affiliation(s)
- Magdalena Działo
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Justyna Mierziak
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Urszula Korzun
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Marta Preisner
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Jan Szopa
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
- Department of Genetics, Plant Breeding and Seed Production, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Plant Sciences, Plac Grunwaldzki 24A, 53-363 Wroclaw, Poland.
| | - Anna Kulma
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| |
Collapse
|
83
|
Nogueira VC, Raniero L, Costa GB, de Freitas Coelho NPM, Miranda FC, Arisawa EÂL. Comparative Study of Morphometric and Fourier Transform Infrared Spectroscopy Analyses of the Collagen Fibers in the Repair Process of Cutaneous Lesions. Adv Wound Care (New Rochelle) 2016; 5:55-64. [PMID: 26862463 PMCID: PMC4742994 DOI: 10.1089/wound.2015.0641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 05/04/2015] [Indexed: 01/18/2023] Open
Abstract
Objective: Compare the efficacy of light-emitting diode (LED) and therapeutic ultrasound (TUS), combined with a semipermeable dressing (D), at forming collagen in skin lesions by morphometry and Fourier transform infrared spectroscopy (FT-IR). Materials and Methods: Surgical skin wounds (2.5 cm) were created on 84 male Wistar rats divided into four groups (n=21): Group I (Control), Group II (LED), Group III (LED+D), and Group IV (US+D). On days 7, 14, and 21, the tissue samples were removed and divided into two pieces, one was used for histological examination (collagen) and the other for FT-IR. Results: The histomorphometric analysis showed no significant differences among groups for collagen deposition at 7 days. However, at 14 days, more deposition of collagen was noted in the groups LED (p<0.05) and LED+D (p<0.001) than in the control. At 21 days, the groups LED, LED+D, and US+D presented significantly greater deposition of collagen when compared with the control. The FT-IR spectra, at 14 days, LED+D had greater amounts of type I collagen, a better organization of fibers, and greater difference of mean separation between the groups, not observed at 7 and 21 days. Innovation: The histomorphometric and FT-IR analyses suggest that the association of semipermeable dressing to LED therapy and to TUS modulates biological events, increasing fibroblast/collagen response and accelerating dermal maturation. Conclusion: The histomorphometric and FT-IR analyses showed that LED therapy is more efficacious than TUS, when combined with a semipermeable dressing, and induced the collagen production in skin lesions.
Collapse
Affiliation(s)
- Veruska Cronemberger Nogueira
- Universidade do Vale do Paraíba, UNIVAP, Teresina, São Paulo, Brazil
- Universidade Estadual do Piauí, UESPI, Teresina, Piauí, Brazil
- Faculdade Integral Diferencial, FACID, Teresina, Piauí, Brazil
| | - Leandro Raniero
- Universidade do Vale do Paraíba, UNIVAP, Teresina, São Paulo, Brazil
| | | | - Nayana Pinheiro Machado de Freitas Coelho
- Universidade do Vale do Paraíba, UNIVAP, Teresina, São Paulo, Brazil
- Universidade Estadual do Piauí, UESPI, Teresina, Piauí, Brazil
- Faculdade Integral Diferencial, FACID, Teresina, Piauí, Brazil
| | | | | |
Collapse
|
84
|
Dabiri G, Damstetter E, Phillips T. Choosing a Wound Dressing Based on Common Wound Characteristics. Adv Wound Care (New Rochelle) 2016; 5:32-41. [PMID: 26858913 DOI: 10.1089/wound.2014.0586] [Citation(s) in RCA: 200] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Significance: Chronic wounds are a major healthcare burden.The practitioner should have an appropriate understanding of both the etiology of the wound as well as the optimal type of dressings to use. Fundamental wound characteristics may be used to guide the practitioner's choice of dressings. The identification of optimal dressings to use for a particular wound type is an important element in facilitating wound healing. Recent Advances: Researchers have sought to design wound dressings that aim to optimize each stage in the healing process. In addition, dressings have been designed to target and kill infection-causing bacteria, with the incorporation of antimicrobial agents. Critical Issues: Chronic wounds are frequently dynamic in presentation, and the numerous wound dressings available make dressing selection challenging for the practitioner. Choosing the correct dressing decreases time to healing, provides cost-effective care, and improves patient quality of life. Future Directions: Research into the mechanisms of wound healing has enhanced our ability to heal chronic wounds at a faster rate through the use of moisture-retentive dressings. Newer dressings are incorporating the use of nanotechnology by incorporating miniature electrical sensors into the dressing. These dressings are engineered to detect changes in a wound environment and alert the patient or practitioner by altering the color of the dressing or sending a message to a smartphone. Additional investigations are underway that incorporate biologic material such as stem cells into dressings.
Collapse
Affiliation(s)
- Ganary Dabiri
- Department of Dermatology and Skin Surgery, Roger Williams Medical Center, Providence, Rhode Island
| | - Elizabeth Damstetter
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts
| | - Tania Phillips
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts
| |
Collapse
|
85
|
Chitrattha S, Phaechamud T. Porous poly( dl -lactic acid) matrix film with antimicrobial activities for wound dressing application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:1122-30. [DOI: 10.1016/j.msec.2015.09.083] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 09/15/2015] [Accepted: 09/23/2015] [Indexed: 10/23/2022]
|
86
|
Zeng Q, Han Y, Li H, Chang J. Design of a thermosensitive bioglass/agarose-alginate composite hydrogel for chronic wound healing. J Mater Chem B 2015; 3:8856-8864. [PMID: 32263479 DOI: 10.1039/c5tb01758k] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chronic wounds are a major health problem around the world, and there is a need to develop new types of dressing materials to enhance chronic wound healing. Humidity and angiogenic conditions are two important factors that may significantly affect the healing process. Therefore, a new wound dressing system based on bioglass (BG) and agarose-alginate (AA) has been designed, which can create a moist environment and improve the angiogenic condition of the wound area at the same time. The obtained BG/AA hydrogel has thermosensitivity allowing it to gel at physiological temperature through the interaction between the agarose and alginate polymer chains, and the chains can be further cross-linked by ions released from BG. The BG/AA hydrogel can promote migration of fibroblast and endothelial cells and it can also enhance the angiogenesis of endothelial cells in a fibroblast-endothelial cell co-culture model in vitro. The potential of the BG/AA hydrogel as a wound dressing has been further evaluated by using the rabbit ear ischemic wound model. The results demonstrate that the BG/AA hydrogel can enhance blood vessel and epithelium formation, which contribute to wound healing. The present study suggests that this new BG/AA hydrogel system may be used as a bioactive dressing for chronic wound healing.
Collapse
Affiliation(s)
- Qiongyu Zeng
- Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, P. R. China
| | | | | | | |
Collapse
|
87
|
Li J, Ma L, Chen G, Zhou Z, Li Q. A high water-content and high elastic dual-responsive polyurethane hydrogel for drug delivery. J Mater Chem B 2015; 3:8401-8409. [PMID: 32262893 DOI: 10.1039/c5tb01702e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Stimuli-responsive hydrogels are soft, biocompatible and smart biomaterials; however, the poor mechanical properties of the hydrogels limit their application. Herein, we prepared a reductant- and light-responsive polyurethane hydrogel which was made of polyethylene glycol, 1,6-diisocyanatohexane, azobenzene, cyclodextrin and disulfide. Attenuated Total Reflectance Infrared Spectra and 1H NMR were used to characterize the structure of the hydrogel. The hydrogel has a high elasticity (a tensile modulus of 36.5 ± 0.5 kPa and a storage modulus of 52.9 ± 1.2 kPa) at a high water content (91.2 ± 0.4%). Swelling, mechanical and rheological properties of the hydrogel can be tuned by the content of the crosslinker, light and reductant. The hydrogel has low cytotoxicity and it can be used for drug delivery. Ultraviolet irradiation helped to load drugs and the reductant accelerated the drug release. With its high mechanical properties and light- and reductant-responsiveness, the hydrogel is hopefully to be used as a drug carrier.
Collapse
Affiliation(s)
- Jinze Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | | | | | | | | |
Collapse
|
88
|
Reyes-Ortega F, Cifuentes A, Rodríguez G, Aguilar MR, González-Gómez Á, Solis R, García-Honduvilla N, Buján J, García-Sanmartin J, Martínez A, Román JS. Bioactive bilayered dressing for compromised epidermal tissue regeneration with sequential activity of complementary agents. Acta Biomater 2015; 23:103-115. [PMID: 26022967 DOI: 10.1016/j.actbio.2015.05.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
Abstract
The article deals with the design, preparation, and evaluation of a new bilayered dressing for application in the healing of compromised wounds. The system is based on the sequential release of two complementary bioactive components to enhance the activation of the regeneration of dermal tissue. The internal layer is a highly hydrophilic and biodegradable film of gelatin and hyaluronic acid (HG), crosslinked with the natural compound genipin, which reacts with the amine groups of gelatin. This film is loaded with the proangiogenic, anti-inflammatory, and antibacterial peptide, proadrenomedullin N-terminal 20 peptide (PAMP), that is released slowly in the wound site. The external layer, more stable and less hydrophilic, is constituted by a biodegradable polyurethane derived from poly(caprolactone) and pluronic L61. This layer is loaded with resorbable nanoparticles of bemiparin (a fractionated low molecular weight heparin), which promotes the activation of growth factors, FGF and VEGF, and provides a good biomechanical stability and controlled permeability of the bilayered dressing. Experiments carried out in mice demonstrate the excellent angiogenic effect of the HG film in the dermal tissue. Application of the bilayered dressing in the wound healing rabbit ear model shows an improved cicatrization of the wound in both ischemic and non-ischemic defects, favoring epithelialization and reducing noticeably the contraction and the inflammation.
Collapse
|
89
|
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.
Collapse
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
| |
Collapse
|
90
|
Nogueira VC, Coelho NPMDF, Barros TLD, Silva SMMDS, Martins M, Arisawa EAL. Biomodulation effects of LED and therapeutic ultrasound combined with semipermeable dressing in the repair process of cutaneous lesions in rats. Acta Cir Bras 2015; 29:588-95. [PMID: 25252205 DOI: 10.1590/s0102-8650201400150006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 07/18/2014] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To compare the biomodulatory effects of LED and ultrasound combined with semipermeable dressing in the repair of cutaneous lesions. METHODS Eighty-four Wistar rats were submitted to surgical injury (2.5 cm) and divided into four groups (n=21): Group I (control), Group II (LED therapy, LED), Group III (LED therapy + dressing, LED+D) and Group IV (ultrasound + dressing, US+D). At seven, 14 and 21 days, the animals were euthanized, and the specimens of interest removed for histological analysis. RESULTS Histological and histomorphometric analysis revealed a greater percent wound regression in animals receiving the dressing (group III: 55.97; group IV: 53.06), as well as a greater reduction in the inflammatory infiltrate (group III: 29.14; group IV: 31.71) since day 7. A later effect, with progression of the tissue repair process only after 14 and 21 days, was observed in the LED group intense fibroblast proliferation and greater collagen fiber production and organization were seen in the LED+D and US+D groups compared to the other groups. CONCLUSION LED combined with a dressing was more effective at accelerating in the repair of cutaneous lesions.
Collapse
|
91
|
Paladini F, Picca RA, Sportelli MC, Cioffi N, Sannino A, Pollini M. Surface chemical and biological characterization of flax fabrics modified with silver nanoparticles for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 52:1-10. [PMID: 25953533 DOI: 10.1016/j.msec.2015.03.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 01/16/2015] [Accepted: 03/22/2015] [Indexed: 02/07/2023]
Abstract
Silver nanophases are increasingly used as effective antibacterial agent for biomedical applications and wound healing. This work aims to investigate the surface chemical composition and biological properties of silver nanoparticle-modified flax substrates. Silver coatings were deposited on textiles through the in situ photo-reduction of a silver solution, by means of a large-scale apparatus. The silver-coated materials were characterized through X-ray Photoelectron Spectroscopy (XPS), to assess the surface elemental composition of the coatings, and the chemical speciation of both the substrate and the antibacterial nanophases. A detailed investigation of XPS high resolution regions outlined that silver is mainly present on nanophases' surface as Ag2O. Scanning electron microscopy and energy dispersive X-ray spectroscopy were also carried out, in order to visualize the distribution of silver particles on the fibers. The materials were also characterized from a biological point of view in terms of antibacterial capability and cytotoxicity. Agar diffusion tests and bacterial enumeration tests were performed on Gram positive and Gram negative bacteria, namely Staphylococcus aureus and Escherichia coli. In vitro cytotoxicity tests were performed through the extract method on murine fibroblasts in order to verify if the presence of the silver coating affected the cellular viability and proliferation. Durability of the coating was also assessed, thus confirming the successful scaling up of the process, which will be therefore available for large-scale production.
Collapse
Affiliation(s)
- F Paladini
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy.
| | - R A Picca
- Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy
| | - M C Sportelli
- Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy
| | - N Cioffi
- Department of Chemistry, University of Bari "Aldo Moro", Via Orabona 4, 70126 Bari, Italy
| | - A Sannino
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
| | - M Pollini
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, 73100 Lecce, Italy
| |
Collapse
|
92
|
Hartlieb M, Kempe K, Schubert US. Covalently cross-linked poly(2-oxazoline) materials for biomedical applications – from hydrogels to self-assembled and templated structures. J Mater Chem B 2015; 3:526-538. [DOI: 10.1039/c4tb01660b] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We discuss covalently cross-linked poly(2-oxazoline)s including gels, nanogels and capsules on the basis of their synthetic origin in a biomedical context.
Collapse
Affiliation(s)
- Matthias Hartlieb
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Kristian Kempe
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| |
Collapse
|
93
|
Transgenic crops: the present state and new ways of genetic modification. J Appl Genet 2014; 55:287-94. [DOI: 10.1007/s13353-014-0210-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 11/25/2022]
|
94
|
Abrigo M, McArthur SL, Kingshott P. Electrospun Nanofibers as Dressings for Chronic Wound Care: Advances, Challenges, and Future Prospects. Macromol Biosci 2014; 14:772-92. [DOI: 10.1002/mabi.201300561] [Citation(s) in RCA: 365] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/16/2014] [Indexed: 12/18/2022]
Affiliation(s)
- Martina Abrigo
- Faculty of Engineering and Industrial Science; Industrial Research Institute Swinburne (IRIS), Swinburne University of Technology; Hawthorn VIC 3122 Australia
| | - Sally L. McArthur
- Faculty of Engineering and Industrial Science; Industrial Research Institute Swinburne (IRIS), Swinburne University of Technology; Hawthorn VIC 3122 Australia
| | - Peter Kingshott
- Faculty of Engineering and Industrial Science; Industrial Research Institute Swinburne (IRIS), Swinburne University of Technology; Hawthorn VIC 3122 Australia
| |
Collapse
|
95
|
Paladini F, Meikle ST, Cooper IR, Lacey J, Perugini V, Santin M. Silver-doped self-assembling di-phenylalanine hydrogels as wound dressing biomaterials. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2461-2472. [PMID: 23793492 DOI: 10.1007/s10856-013-4986-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 06/14/2013] [Indexed: 06/02/2023]
Abstract
Chronic and acute wounds can be quickly contaminated and infected by microorganisms such as bacteria, multi-resistant organisms or fungi. The introduction of silver as anti-microbial agent into wound management has widely been demonstrated to be effective and contribute to wound healing. As a consequence, many approaches and different materials have been employed to synthesize antibacterial silver-hydrogels. In this work the introduction of silver particles into the fibrillar structure of self-assembling aromatic di-phenylalanine derivatives modified with aromatic groups such as 9-fluorenylmethoxycarbonyl is proposed to produce antibacterial wound dressings. Hydrogels doped with increasing amounts of silver were tested and adopted to modify flax textiles. The influence of silver on the structure of hydrogels was studied using light and confocal microscopy, while SEM-EDX allowed the characterization of the hydrogel coating on the surface of the textile substrates as well as the identification and distribution of silver nanoparticles. The antibacterial potential of the treated flax was demonstrated through microbiological tests on Staphylococcus aureus. The combination of the physico-chemical and anti-bacterial properties, together with the ease of preparation of these biomaterials, fulfils the requirement of clinically-effective wound dressings.
Collapse
Affiliation(s)
- Federica Paladini
- Department of Engineering for Innovation, University of Salento, 73100, Lecce, Italy,
| | | | | | | | | | | |
Collapse
|
96
|
Siritientong T, Angspatt A, Ratanavaraporn J, Aramwit P. Clinical Potential of a Silk Sericin-Releasing Bioactive Wound Dressing for the Treatment of Split-Thickness Skin Graft Donor Sites. Pharm Res 2013; 31:104-16. [DOI: 10.1007/s11095-013-1136-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Accepted: 06/24/2013] [Indexed: 12/14/2022]
|
97
|
Pereira RF, Carvalho A, Gil MH, Mendes A, Bártolo PJ. Influence of Aloe vera on water absorption and enzymatic in vitro degradation of alginate hydrogel films. Carbohydr Polym 2013; 98:311-20. [PMID: 23987350 DOI: 10.1016/j.carbpol.2013.05.076] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/21/2013] [Accepted: 05/28/2013] [Indexed: 01/24/2023]
Abstract
This study investigates the influence of Aloe vera on water absorption and the in vitro degradation rate of Aloe vera-Ca-alginate hydrogel films, for wound healing and drug delivery applications. The influence of A. vera content (5%, 15% and 25%, v/v) on water absorption was evaluated by the incubation of the films into a 0.1 M HCl solution (pH 1.0), acetate buffer (pH 5.5) and simulated body fluid solution (pH 7.4) during 24h. Results show that the water absorption is significantly higher for films containing high A. vera contents (15% and 25%), while no significant differences are observed between the alginate neat film and the film with 5% of A. vera. The in vitro enzymatic degradation tests indicate that an increase in the A. vera content significantly enhances the degradation rate of the films. Control films, incubated in a simulated body fluid solution without enzymes, are resistant to the hydrolytic degradation, exhibiting reduced weight loss and maintaining its structural integrity. Results also show that the water absorption and the in vitro degradation rate of the films can be tailored by changing the A. vera content.
Collapse
Affiliation(s)
- Rúben F Pereira
- Centre for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Centro Empresarial da Marinha Grande, Marinha Grande, Portugal
| | | | | | | | | |
Collapse
|