scholarly journals Antibacterial wound dressing nanofibrous mats composed of cellulose acetate loaded with chitosan/erythromycin nanoparticles

2020 ◽  
Author(s):  
Maryam Doostan ◽  
Hassan Maleki ◽  
Mahtab Doostan ◽  
Kamyar Khoshnevisan ◽  
Reza Faridi-Majidi ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Wound Dressing ◽  
Dermal Fibroblast ◽  
Chitosan Nanoparticles ◽  
Average Diameter ◽  
Absorption Capacity ◽  
Attenuated Total Reflection ◽  
Fibroblast Cells ◽  
High Porosity ◽  
Infected Wound

Abstract This study attempts to fabricate the antibacterial nanofibrous mats composed of cellulose acetate (CA) nanofibers loaded with erythromycin-chitosan nanoparticles (Ery-CS NPs) intended for infected wound dressing. The Ery-loaded CS NPs were prepared by ionic gelation process and then incorporated into the CA electrospun nanofibers (NFs). The characterization of the NPs and mats were investigated by using dynamic light scattering (DLS), scanning electron microscopy (SEM), Attenuated Total Reflection Fourier transform infrared (ATR-FTIR) to show the size distribution, morphology and surface chemistry along with other physiochemical properties including hydrophilicity property, porosity, and water absorption capacity. The antimicrobial activity and cell viability of fibroblast cells were also evaluated. The results indicated that Ery was loaded into CS NPs with high encapsulation efficiency (95%). The CA NFs (17%) incorporated with the Ery-CS NPs (12 wt%) displayed smooth homogenous morphology with 141.7 ± 91.7 nm average diameter. The relevant analyses revealed that the NPs incorporated in NFs and provided high water holding capacity with high porosity. Finally, Ery-CS NPs/CA mats were able to inhibit the growth of both Gram-positive and Gram-negative bacteria as well as showed no cytotoxic effect on the human dermal fibroblast cells. Overall, our findings concluded that the proposed system could be potentially applied as the proper antibacterial mats for infected wound dressing applications.

Fabrication and characterisation of a wound dressing composed of polyvinyl alcohol and quince seed mucilage

2021 ◽  
Vol 30 (Sup9a) ◽  
pp. XIIIi-XIIIx
Author(s):  
Mahshid Jafari ◽  
Hossein Baniasadi ◽  
Alireza Rezvanpour ◽  
Marzieh Lotfi
Keyword(s):  
Polyvinyl Alcohol ◽  
Wound Dressing ◽  
Healing Process ◽  
Average Diameter ◽  
Wound Dressings ◽  
Fibroblast Cells ◽  
Sem Images ◽  
Freeze Dried ◽  
Electrospinning Method ◽  
Seed Mucilage

Objective: Providing a suitable environment to improve the healing process is the main target of wound dressing that also protects the wound from additional harms. In the present study, fabrication and characterisation of a new kind of electrospun wound dressing composed of polyvinyl alcohol (PVA) and quince seed mucilage (QSM) is reported. Method: QSM was extracted from quince seeds, purified, freeze-dried and used to produce aqueous solutions containing different amounts of PVA and QSM. The wound dressings were fabricated via the electrospinning method and their characteristics were investigated with scanning electron microscope (SEM) images, Fourier transform infrared (FTIR) spectra, tensile and swelling test, and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) cytotoxicity assay against fibroblast cells. Results: SEM images confirmed that proper, uniform, non-oriented nanofibres with an average diameter in the range of 60–240nm, depending on the QSM content had been fabricated. The tensile test showed that with increasing QSM content, the tensile strength of fibre increased while elongation at break was decreased, which was consistent with SEM images where the diameter of samples decreased by increasing QSM content. MTT assay showed significant biocompatibility against fibroblast cells; however, it was increased by increased QSM proportion. In addition, SEM images supported the proper adhesion of fibroblast cells on the sample one day after culturing. Conclusion: Overall, the findings of the current study support the potential of PVA/QSM nanofibres as a proper candidate for biomedical applications, especially as a wound dressing.

scholarly journals Fabrication of Hybrid Nanofibers from Biopolymers and Poly (Vinyl Alcohol)/Poly (ε-Caprolactone) for Wound Dressing Applications

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2104
Author(s):  
Sibusiso Alven ◽  
Blessing Atim Aderibigbe
Keyword(s):  
Mechanical Properties ◽  
Wound Healing ◽  
Vinyl Alcohol ◽  
Wound Dressing ◽  
Chronic Wounds ◽  
Cellular Adhesion ◽  
Wound Dressings ◽  
Poly Vinyl Alcohol ◽  
High Porosity ◽  
Hybrid Nanofibers

The management of chronic wounds is challenging. The factors that impede wound healing include malnutrition, diseases (such as diabetes, cancer), and bacterial infection. Most of the presently utilized wound dressing materials suffer from severe limitations, including poor antibacterial and mechanical properties. Wound dressings formulated from the combination of biopolymers and synthetic polymers (i.e., poly (vinyl alcohol) or poly (ε-caprolactone) display interesting properties, including good biocompatibility, improved biodegradation, good mechanical properties and antimicrobial effects, promote tissue regeneration, etc. Formulation of these wound dressings via electrospinning technique is cost-effective, useful for uniform and continuous nanofibers with controllable pore structure, high porosity, excellent swelling capacity, good gaseous exchange, excellent cellular adhesion, and show a good capability to provide moisture and warmth environment for the accelerated wound healing process. Based on the above-mentioned outstanding properties of nanofibers and the unique properties of hybrid wound dressings prepared from poly (vinyl alcohol) and poly (ε-caprolactone), this review reports the in vitro and in vivo outcomes of the reported hybrid nanofibers.

Preparation and characterization of electrospun cellulose acetate sub-micro fibrous membranes

2021 ◽  
pp. 004051752110117
Author(s):  
Zhenzhen Quan ◽  
Yihan Wang ◽  
Jiajun Wu ◽  
Xiaohong Qin ◽  
Jianyong Yu
Keyword(s):  
Cellulose Acetate ◽  
High Specific Surface Area ◽  
Proper Solution ◽  
High Porosity ◽  
Hydrolysis Time ◽  
Research Fields ◽  
Average Porosity ◽  
Fibrous Membranes ◽  
Microfiber Membrane ◽  
Solution Parameters

Electrospun sub-microfiber membrane of cellulose acetate (CA), with excellent biodegradability, high specific surface area and high porosity, has attracted wide attention in various research fields. Even so, the stable continuous electrospinning of CA sub-micro fibers is affected by the solution parameters and CA acetylation degree dramatically, which still remains challenging. In the present work, electrospun CA sub-micro fibrous membranes have been prepared from four distinct solvent systems, respectively, to explore the proper solution parameters for membrane fabrication. After hydrolysis and electrospinning, the produced CA sub-micro fibrous membranes were analyzed in terms of fiber size distribution, hydrophilicity and porosity. Current analysis has shown that the degree of substitution of CA sub-micro fibers decreases with the increase in hydrolysis time, resulting in increased diameter irregularity, decreased average porosity and increased hydrophilicity of the sub-micro fibrous membrane.

Corrigendum to “IFN-gamma regulates the expression of B7-H1 in dermal fibroblast cells” [J. Dermatol. Sci. 40 (2005) 95–103]

2006 ◽  
Vol 42 (3) ◽  
pp. 273 ◽  
Author(s):  
Sang-Keun Lee ◽  
Sam-Hwa Seo ◽  
Byoung-Soo Kim ◽  
Chang-Deok Kim ◽  
Jeung-Hoon Lee ◽  
...  
Keyword(s):  
Dermal Fibroblast ◽  
Fibroblast Cells ◽  
Ifn Gamma
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