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Porous hydrogels from natural gum modified with bio-active substances for accelerated wound healing
Černá, Eva ; Brtníková, Jana (oponent) ; Vojtová, Lucy (vedoucí práce)
The main aim of this thesis is to design, prepare and optimize composition of hydrogel dressing for wound healing with skin-like properties. An inexpensive hydrogel dressing with properties that accelerate healing process, supress bacterial infection and support easy handling is supposed to be a result of this work.. The theoretical part is focused on properties of each layer of the skin, polymer materials suitable for wound healing, pro-healing and antimicrobial agents suitable for antimicrobial environment in the wound. The experimental part includes several steps. The first one is optimization of the composition of the porous hydrogel dressing composed of natural polymer, resin Gum Karaya (GK) modified with synthetic hydrophilic gelling polymers and important emollient componentto obtain soft, elastic and transparent films via freeze-drying technique. Films were tested in terms of swelling ratio, hydrolytic stability, transparency, strength in tension in both dry and wet conditions, chemical composition and morphology. The second step includes integration of bioactive antiseptic compound into the structure of the hydrogel, which provides suitable antimicrobial properties for wound healing. Prepared transparent, hydrolytically stable and very tough hydrogel films were found to be effective against both gram-positive and gram negative bacterial strains tested within these work, specifically Staphylococcus aureus methicillin-sensitive, Staphylococcus aureus methicillin-resistant, Staphylococcus epidermidis, Klebsiella pneumoniae, Enterobacter cloacae, Enterococcus faecalis, Pseudomonas aeruginosa, Candida albicans and Escherichia coli. Followed work will be focused on both in vitro and in vivo biocompatibility evaluations.
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