scholarly journals Composite Wound Dressing Based on Chitin/Chitosan Nanofibers: Processing and Biomedical Applications

Cosmetics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 16 ◽  
Author(s):  
Anton Shabunin ◽  
Vladimir Yudin ◽  
Irina Dobrovolskaya ◽  
Evgeny Zinovyev ◽  
Viktor Zubov ◽  
...  
Keyword(s):  
Wound Dressing ◽  
High Efficiency ◽  
Healing Process ◽  
Experimental Studies ◽  
Scar Tissue ◽  
Wound Dressings ◽  
Control Group ◽  
Wound Healing Process ◽  
Electrospinning Technique

An electrospinning technique was used for the preparation of a bilayered wound dressing consisting of a layer of aliphatic copolyamide nanofibers and a layer of composite nanofibers from chitosan and chitin nanofibrils filler. Processed dressings were compared with aliphatic copolyamide nanofiber-based wound dressings and control groups. Experimental studies (in vivo treatment of third-degree burns with this dressing) demonstrated that almost complete (up to 97.8%) epithelialization of the wound surface had been achieved within 28 days. Planimetric assessment demonstrated a significant acceleration of the wound healing process. Histological analysis of scar tissue indicated the presence of a significant number of microvessels and a low number of infiltrate cells. In the target group, there were no deaths or purulent complications, whereas in the control group these occurred in 25% and 59.7% of cases, respectively—and, in the copolyamide group, 0% and 11%, respectively. The obtained data show the high efficiency of application of the developed composite chitosan‒copolyamide wound dressings for the treatment of burn wounds.

Preparation and in vivo evaluation of a novel gel-based wound dressing using arginine–alginate surface-modified chitosan nanofibers

2017 ◽  
Vol 32 (6) ◽  
pp. 689-701 ◽  
Author(s):  
Mahsa Hoseinpour Najar ◽  
Mohsen Minaiyan ◽  
Azade Taheri
Keyword(s):  
Wound Healing ◽  
Wound Dressing ◽  
Healing Process ◽  
Wound Dressings ◽  
Wound Healing Process ◽  
In Vivo Evaluation ◽  
Animal Group ◽  
Modified Chitosan ◽  
Surface Modified

The development of an effective wound dressing with the ability to induce skin wound healing is a great challenge in medicine. Nanofibers are highly attractive for wound dressing preparation due to their properties such as hemostasis induction, good absorption of wound exudates, and facilitation of cell growth. Chitosan nanofibers have attracted great attention for application in wound dressings due to their accelerating effects on wound healing. In this study, arginine surface-modified chitosan nanofibers were successfully prepared by attachment of arginine molecules on the surface of chitosan nanofibers using sodium alginate through electrostatic interaction. The effect of pH on the amount of attached arginine was evaluated at three different pH values; 5, 6, and 7. Fourier-transform infrared spectroscopy and zeta potential of chitosan nanofibers before and after surface modification suggested the occurrence of the attachment of arginine to chitosan nanofibers. Scanning electron microscope images showed the nanofibrous structure of arginine surface-modified chitosan nanofibers with an average diameter ranging from 100 nm to 150 nm. The release of arginine from arginine surface-modified chitosan nanofibers gel showed a sustained release manner. The suitable viscosity and spreadability of arginine surface-modified chitosan nanofibers gel verified its easy application at the wound site. Arginine surface-modified chitosan nanofibers gel significantly improved the wound healing process including wound closure when tested in vivo using rat model. Additionally, histological examination and immunohistochemical studies showed the significant enhancement of the re-epithelialization, collagen deposition, and angiogenesis in the skin of the animal group treated with arginine surface-modified chitosan nanofibers gel compared with the other control groups. These results suggested that arginine surface-modified chitosan nanofibers gel could be introduced as an effective wound dressing.

Evaluation of a novel bioactive wound dressing: an in vitro and in vivo study

2021 ◽  
Vol 30 (6) ◽  
pp. 482-490
Author(s):  
Fahimeh Farshi Azhar ◽  
Paria Rostamzadeh ◽  
Monireh Khordadmehr ◽  
Mehran Mesgari-Abbasi
Keyword(s):  
Wound Healing ◽  
Wound Dressing ◽  
Healing Process ◽  
Wound Dressings ◽  
Bilayer Film ◽  
Wound Healing Process ◽  
Tissue Contraction ◽  
Experimental Rat Model

Objective: Hard-to-heal wounds, such as pressure ulcers and diabetic ulcers, are a major challenge for wound dressings. The aim of this study was to develop a bioactive dressing based on polymers and natural materials with unique biological and therapeutic properties. Method: The dressing was composed of an active layer containing polyvinyl alcohol (PVA), honey, curcumin and keratin, and an upper layer with lower hydrophilicity comprising PVA to induce flexibility. Physicochemical properties of the dressing were characterised by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, swelling behaviour and antibacterial measurements. A wound healing study was performed using an experimental rat model and two different compositions of the bioactive dressing were compared with a commercial wound dressing (Comfeel, Coloplast, Denmark). Histopathological evaluation was conducted for this purpose. Results: Characterisation results showed that a smooth bilayer film with two homogenous but distinct layers was produced. The dressing also provided adequate moisture to the wound environment without infection and adhesion due to dryness occurring. Our results exhibited significant bactericidal activity against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria and improved the wound healing process without any scarring. Histopathological findings demonstrated a significant higher healing rate in vivo together with well-formed epidermis, granulation tissue formation and tissue contraction, when compared with the commercial wound dressing. Conclusion: Our results demonstrated acceptable physical and healing effects for the novel bioactive wound dressing; however, more investigations are recommended.

scholarly journals A systematic and quantitative method for wound-dressing evaluation

2015 ◽  
Vol 3 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaorong Zhang ◽  
Rui Xu ◽  
Xiaohong Hu ◽  
Gaoxing Luo ◽  
Jun Wu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Wound Dressing ◽  
Healing Process ◽  
Wound Dressings ◽  
Control Group ◽  
Wound Healing Process ◽  
Different Types ◽  
Histological Results ◽  
Full Thickness Wound ◽  
Wound Tissue

Abstract Background For patients with skin defects such as burns, wound dressing plays important roles in protecting the wound. Before a novel wound dressing is applied to a patient, a series of tests should be performed to ensure its safety and efficacy. Different types of animal wound-healing models have been used to study the bio-function of different wound dressings; however, a systematic way to evaluate the effect of a wound dressing on wound healing and cutaneous regeneration is lacking. Methods In the study presented here, full-thickness wound models were established in mice, and a systematic way to quantitatively analyze the wound-healing process and the histological results is described. Results It was found that the rate of wound healing in the tested wound dressing (TWD) group was higher than that in the control group, and the re-epithelialization and the formation of granulation tissue were enhanced when the TWD was applied. Meanwhile, the inflammatory response was attenuated in the TWD group, and more mature and better aligned collagen fibers in the healed wound tissue was found in the TWD group compared with that in the control group. Conclusions A systematic, quantitative way to analyze the effect of a wound dressing on wound healing was established. And it might be helpful for the design of wound dressing in the future.

Preparation of biocompatible wound dressings with dual release of antibiotic and platelet-rich plasma for enhancing infected wound healing

2021 ◽  
pp. 088532822199601
Author(s):  
Linying Shi ◽  
Fang Lin ◽  
Mou Zhou ◽  
Yanhui Li ◽  
Wendan Li ◽  
...  
Keyword(s):  
Wound Healing ◽  
Wound Dressing ◽  
Platelet Rich Plasma ◽  
Healing Process ◽  
Wound Dressings ◽  
Inflammatory Factors ◽  
Gelatin Microspheres ◽  
Infected Wounds ◽  
Dual Release

The ever-growing threats of bacterial infection and chronic wound healing have provoked an urgent need for novel antibacterial wound dressings. In this study, we developed a wound dressing for the treatment of infected wounds, which can reduce the inflammatory period (through the use of gentamycin sulfate (GS)) and enhance the granulation stage (through the addition of platelet-rich plasma (PRP)). Herein, the sustained antimicrobial CMC/GMs@GS/PRP wound dressings were developed by using gelatin microspheres (GMs) loading GS and PRP, covalent bonding to carboxymethyl chitosan (CMC). The prepared dressings exhibited high water uptake capability, appropriate porosity, excellent mechanical properties, sustain release of PRP and GS. Meanwhile, the wound dressing showed good biocompatibility and excellent antibacterial ability against Gram-negative and Gram-positive bacteria. Moreover, in vivo experiments further demonstrated that the prepared dressings could accelerate the healing process of E. coli and S. aureus-infected full-thickness wounds i n vivo, reepithelialization, collagen deposition and angiogenesis. In addition, the treatment of CMC/GMs@GS/PRP wound dressing could reduce bacterial count, inhibit pro-inflammatory factors (TNF-α, IL-1β and IL-6), and enhance anti-inflammatory factors (TGF-β1). The findings of this study suggested that biocompatible wound dressings with dual release of GS and PRP have great potential in the treatment of chronic and infected wounds.

scholarly journals Gelatin-Based Hybrid Scaffolds: Promising Wound Dressings

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2959 ◽  
Author(s):  
Sindi P. Ndlovu ◽  
Kwanele Ngece ◽  
Sibusiso Alven ◽  
Blessing A. Aderibigbe
Keyword(s):  
Mechanical Properties ◽  
Antimicrobial Activity ◽  
Wound Healing ◽  
Antimicrobial Agents ◽  
Healing Process ◽  
Wound Dressings ◽  
Wound Healing Process ◽  
Delayed Wound Healing

Wound care is a major biomedical field that is challenging due to the delayed wound healing process. Some factors are responsible for delayed wound healing such as malnutrition, poor oxygen flow, smoking, diseases (such as diabetes and cancer), microbial infections, etc. The currently used wound dressings suffer from various limitations, including poor antimicrobial activity, etc. Wound dressings that are formulated from biopolymers (e.g., cellulose, chitin, gelatin, chitosan, etc.) demonstrate interesting properties, such as good biocompatibility, non-toxicity, biodegradability, and attractive antimicrobial activity. Although biopolymer-based wound dressings display the aforementioned excellent features, they possess poor mechanical properties. Gelatin, a biopolymer has excellent biocompatibility, hemostatic property, reduced cytotoxicity, low antigenicity, and promotes cellular attachment and growth. However, it suffers from poor mechanical properties and antimicrobial activity. It is crosslinked with other polymers to enhance its mechanical properties. Furthermore, the incorporation of antimicrobial agents into gelatin-based wound dressings enhance their antimicrobial activity in vitro and in vivo. This review is focused on the development of hybrid wound dressings from a combination of gelatin and other polymers with good biological, mechanical, and physicochemical features which are appropriate for ideal wound dressings. Gelatin-based wound dressings are promising scaffolds for the treatment of infected, exuding, and bleeding wounds. This review article reports gelatin-based wound dressings which were developed between 2016 and 2021.

scholarly journals Intelligent wound dressing for diagnostic & therapeutic applications - critical to wound infection

2020 ◽  
Vol 2 (7A) ◽  
Author(s):  
Zahid Mahmood ◽  
Anne-Marie Salisbury ◽  
Rui Chen ◽  
Stephen Rimmer ◽  
Steven Percival
Keyword(s):  
Wound Dressing ◽  
Antimicrobial Agents ◽  
Detection System ◽  
Healing Process ◽  
Wound Dressings ◽  
Core Material ◽  
Wound Healing Process ◽  
Polymer Complex ◽  
Triggered Release ◽  
Antibiofilm Agents

A medical device comprising of biomaterials responsive to biochemical stimuli: channel for indicating the infective states of wounds and ensuring delivery of smart antimicrobial and antibiofilm agents to promote tissue regeneration and healing. The importance of providing diagnostic wound dressings that can inform healthcare professionals on the state of infection within wounds but also provide some of the treatment required in response to at risk or infected wounds is of key interest. The aim is to investigate an innovative proof of concept diagnostic and detection system, an intelligent hydrogel wound dressing that responds to specific biochemical stimuli in wounds (MMPs and pH) enabling the selective and triggered release of antibiofilm and antimicrobial agents (‘Detect and Treat’)to the trauma site. The dressing is made of a sterile alginate core material covered in a biocompatible dry or hydrated peptide-polymer-complex film and may include a fluorescent dye which upon release during the wound healing process indicates when a change in dressing is necessary. Efficacy studies of the hydrogel dressing were performed within a drip-flow bioreactor in which regression of Pseudomonas aeruginosa biofilm was observed. A 5-log reduction in biofilm was observed in comparison to an untreated control biofilm. The hydrogel dressing indicated a clear response when in contact with biofilms produced only by pathogenic strains of bacteria when analysed. This further confirmed the adequate release and function of the antimicrobial and antibiofilm agents within the peptide-polymer-complex formulation of the hydrogel wound dressing.

scholarly journals Collagen-Based Nanofibers for Skin Regeneration and Wound Dressing Applications

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4368
Author(s):  
Zintle Mbese ◽  
Sibusiso Alven ◽  
Blessing Atim Aderibigbe
Keyword(s):  
Wound Healing ◽  
Wound Dressing ◽  
Cellular Proliferation ◽  
Healing Process ◽  
Skin Regeneration ◽  
Wound Dressings ◽  
Wound Management ◽  
Major Constituent ◽  
Wound Healing Process ◽  
Frequent Change

Skin regeneration after an injury is very vital, but this process can be impeded by several factors. Regenerative medicine is a developing biomedical field with the potential to decrease the need for an organ transplant. Wound management is challenging, particularly for chronic injuries, despite the availability of various types of wound dressing scaffolds in the market. Some of the wound dressings that are in clinical practice have various drawbacks such as poor antibacterial and antioxidant efficacy, poor mechanical properties, inability to absorb excess wound exudates, require frequent change of dressing and fails to offer a suitable moist environment to accelerate the wound healing process. Collagen is a biopolymer and a major constituent of the extracellular matrix (ECM), making it an interesting polymer for the development of wound dressings. Collagen-based nanofibers have demonstrated interesting properties that are advantageous both in the arena of skin regeneration and wound dressings, such as low antigenicity, good biocompatibility, hemostatic properties, capability to promote cellular proliferation and adhesion, and non-toxicity. Hence, this review will discuss the outcomes of collagen-based nanofibers reported from the series of preclinical trials of skin regeneration and wound healing.

scholarly journals Perbandingan Pemberian Madu Lokal Bunga Cengkeh (Syzygium aromaticum) dan Madu Impor Bunga Manuka (Leptospermum scoparium) Secara Topikal Terhadap Penyembuhan Luka Sayat Pada Mencit Putih (Mus musculus)

2019 ◽  
Vol 6 (2) ◽  
pp. 25
Author(s):  
Nikita Tenritojang Mustafa ◽  
Dini Kurnia Ikliptikawati ◽  
Abdul Wahid Jamaluddin
Keyword(s):  
Wound Healing ◽  
Povidone Iodine ◽  
Healing Process ◽  
Colour Change ◽  
Negative Control Group ◽  
Negative Control ◽  
Wound Dressings ◽  
Control Group ◽  
Wound Healing Process ◽  
Syzygium Aromaticum

ABSTRAK Luka merupakan trauma fisik mengakibatkan kulit terbuka. Luka merupakan jalur masuk bagi mikroorganisme dari luar penyebab infeksi. Dahulu madu dimanfaatkan untuk mengobati luka bakar dan luka sayat. Madu memiliki keunggulan yakni memiliki hidrogen peroksida, eugenol dan methylglyoxal yang merupakan antibiotik yang unggul. Penelitian ini dilakukan dengan uji ekperimental. Hewan coba dibagi dalam 4 kelompok. Setiap kelompok diberikan perlakukan antara lain: dengan pemberian madu lokal, madu impor, dan salep povidone iodine (kontrol positif), dan kelompok kontrol negatif tanpa perlakuan. Dilanjutkan pemantauan dan pencatatan untuk proses penyembuhan tiap kelompok. Hal ini diukur dengan indikator antara lain: luas luka, kelembaban luka, warna, serta perubahan keropeng. Pada penelitian ini ditemukan bahwa dengan pemberian madu mempercepat proses penyembuhan luka dibandingkan dengan pemberian air dan povidone iodine (p<0,05). Selain itu ditemukan madu lokal memberikan efek penyembuhan luka yang lebih cepat dibandingkan madu impor. Pemberian madu memberikan efek yang lebih baik terhadap penyembuhan luka. Dibandingkan dengan pemberian salep Povidone iodine dan tanpa perlakuan.Kata kunci : Madu Bunga Cengkeh, Madu Bunga Manuka, Waktu penyebuhan, Warna Luka, Kelembaban. ABSTRACT Wound is a physical trauma causes discontinuity, Leads physiological dysfunction. Wound is an entry point for microorganisms from outside as source of infection. In the past, honey was used to treat burns and cuts. Honey is a natural ingredient as a moist wound-dressings. Besides that, honey contain hydrogen peroxide, eugenol, and methylglyoxal which is a superior antibiotic. This research was carried out by experimental test. The experimental animals were divided into 4 groups, each group consisted of 6 animals. Each group is treated, among others; by giving local honey, imported honey, povidone iodine (positive control), and negative control group without a treatment. Continued monitoring and recording for the healing process of each group. Statistical analysis is performed by calculation of frequency distribution and Independent-t, Anova, and regression analysis to determine the relationship between each variable. Statistical test results are significant if the value of p <0.05. This research found that addition of honeyaccelerated the wound healing process compared to the administration of water and povidone iodine (p <0.05). This is measured by indicators including; wide wounds, moisture wounds, colour change, and scab changes. By giving honey the perfect wound healing process begins on the 11th day until the 13th day. Besides that, local honey is found to provide healing effects that are faster than imported honey. Giving honey provides a better effect on wound healing. compared with Povidone iodine and without a treatment Keywords: Clove Flower Honey, Manuka Flower Honey, Time of Wasting, Colour of Wound, Moisture

scholarly journals Current Trends in Advanced Alginate-Based Wound Dressings for Chronic Wounds

2021 ◽  
Vol 11 (9) ◽  
pp. 890
Author(s):  
Andreea Barbu ◽  
Bogdan Neamtu ◽  
Marius Zăhan ◽  
Gabriela Mariana Iancu ◽  
Ciprian Bacila ◽  
...  
Keyword(s):  
Wound Healing ◽  
Chronic Inflammation ◽  
Wound Dressing ◽  
Chronic Wounds ◽  
Healing Process ◽  
Wound Dressings ◽  
In Vivo Studies ◽  
Public Health Issue ◽  
Wound Healing Process ◽  
Special Importance

Chronic wounds represent a major public health issue, with an extremely high cost worldwide. In healthy individuals, the wound healing process takes place in different stages: inflammation, cell proliferation (fibroblasts and keratinocytes of the dermis), and finally remodeling of the extracellular matrix (equilibrium between metalloproteinases and their inhibitors). In chronic wounds, the chronic inflammation favors exudate persistence and bacterial film has a special importance in the dynamics of chronic inflammation in wounds that do not heal. Recent advances in biopolymer-based materials for wound healing highlight the performance of specific alginate forms. An ideal wound dressing should be adherent to the wound surface and not to the wound bed, it should also be non-antigenic, biocompatible, semi-permeable, biodegradable, elastic but resistant, and cost-effective. It has to give protection against bacterial, infectious, mechanical, and thermal agents, to modulate the level of wound moisture, and to entrap and deliver drugs or other molecules This paper explores the roles of alginates in advanced wound-dressing forms with a particular emphasis on hydrogels, nanofibers networks, 3D-scaffolds or sponges entrapping fibroblasts, keratinocytes, or drugs to be released on the wound-bed. The latest research reports are presented and supported with in vitro and in vivo studies from the current literature.

scholarly journals CYTOTOXICITY ASSAY USING BRINE SHRIMP LETHALITY TEST ON COLLAGEN-CHITOSAN WOND DRESSING STERILIZED BY ULTRAVIOLET LIGHT

2020 ◽  
Vol 2 (1) ◽  
pp. 21-26
Author(s):  
Ary Andini ◽  
Endah Prayekti ◽  
Devyana Dyah Wulandari ◽  
Ersalina Nidianti
Keyword(s):  
Brine Shrimp ◽  
Wound Dressing ◽  
Uv Light ◽  
Healing Process ◽  
Solution Concentration ◽  
Cytotoxicity Assay ◽  
Control Group ◽  
Wound Healing Process ◽  
Brine Shrimp Lethality ◽  
Channa Striata

Collagen gives a moist state on the wound area to accelerate the wound healing process. Chitosan is a polymer as known as non-toxic, antibacterial, antifungal, biodegradable, and biocompatible materials. Combination of collagen and chitosan expected to be the  best biomaterials as a wound dressing for the healing process. The study aimed to determine cytotoxicity assay on collagen-chitosan wound dressing  sterilized by ultraviolet (UV) Light using Brine Shrimp Lethality Test (BSLT) method. The test groups were divided into  K0, K1, K2, and K3 groups. K0 contained pure chitosan as a control group, K1 contained collagen 25%-chitosan 75%, K2 contained collagen 50%-chitosan 50%, K3 contained  collagen 75%-Chitosan 25%. Collagen extracted from skin and scalp of snakehead fish (Channa striata) then mixed with chitosan until formed collagen-chitosan wound dressing. This study used Brine Shrimp Level Test (BSLT) method with solution concentration 10, 50, 100, 250, 500, 750 and 1000 ppm. Based on the results showed that K0, K1, K2, and K3 group had LC50 > 1000 that proven collagen-chitosan wound dressing was non-toxic materials. As conclusion of the study explained composite wound dressing based on collagen-chitosan in all groups that sterilized under UV-Light along 15 minutes was not toxic based on Brine Shrimp Lethality Test showed LC50> 1000.

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