Příprava a charakterizace mikro- a nanočástic s obsahem vybraných léčiv
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A
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Vysoké učení technické v Brně. Fakulta chemická
Abstract
Predložená práca je zameraná na možnosť prípravy kombinovaných mikro- a nanočastíc obsahujúcich prírodný extrakt s antioxidačným účinkom, ibuprofenom ako protizápalovou a analgetickou zložkou a klotrimazolom ako látkou s antifungálnym účinkom. V teoretickej časti bola vypracovaná rešerš zameraná na metódy prípravy lipozómov a enkapsuláciu aktívnych látok, charakterizáciu častíc a metódy stanovenia obsahu enkapsulovaných zložiek. Ďalej bol popísaný kvasinkový kmeň Candida a metódy stanovenia antimikrobiálnej aktivity. Do lipozómov, alginátových a chitosanových častíc boli enkapsulované vymenované zložky. Bola charakterizovaná antioxidačná aktivita extraktov. Ďalej boli stanovené a porovnané enkapsulačné účinnosti jednotlivých zložiek a dlhodobá stabilita týchto zložiek vo vodných roztokoch všetkých 32 typov pripravených častíc. Metódou HPLC bol určený obsah liečiv a spektrofotometricky obsah polyfenolov. Na určenie veľkosti vybraných typov častíc bola použitá metóda DLS a na stabilitu zeta potenciál. Boli vykonané antimikrobiálne testy na kmeni Candida glabrata a bol porovnaný účinok látok vo voľnom roztoku, v časticiach a rozrušených lipozómoch. Na záver bolo navrhnuté možné využitie pripravených lipozómov do kozmetického či farmaceutického prípravku.
The presented bachelor thesis is focused on the way to prepare combined micro- and nanoparticles containing some natural extracts with antioxidant effects, ibuprofen as the anti-inflammatory and analgetic agent and clotrimazole as the agent with an antifungal effect. The theoretical part contains an introduction of the methods of liposome preparation and a review of encapsulation techniques, methods of particles characterization, and analysis of active substances content. Furthermore, the yeasts of the genus Candida and the methods of the antimicrobial activity determination are described. The mentioned components were encapsulated into liposomes, alginate and chitosan particles. The antioxidant activity of the extracts was determined spectrophotometrically. The encapsulation effectivity of active substances into particles and the long-term stability of encapsulated components were determined and compared too. The HPLC method was used for measuring of the concentration of drugs and spectrophotometric method was used to quantify the content of polyphenols. Prepared particles were characterized with DLS method (size) and zeta- potential (stability). Finally, antibacterial properties of prepared particles and extracts using the test system Candida glabrata were studied. The antimycotic effect of particles, disturbed liposomes and extracts was compared. Finally, potential utilization of prepared liposomes in a cosmetic or pharmaceutical product is proposed.
The presented bachelor thesis is focused on the way to prepare combined micro- and nanoparticles containing some natural extracts with antioxidant effects, ibuprofen as the anti-inflammatory and analgetic agent and clotrimazole as the agent with an antifungal effect. The theoretical part contains an introduction of the methods of liposome preparation and a review of encapsulation techniques, methods of particles characterization, and analysis of active substances content. Furthermore, the yeasts of the genus Candida and the methods of the antimicrobial activity determination are described. The mentioned components were encapsulated into liposomes, alginate and chitosan particles. The antioxidant activity of the extracts was determined spectrophotometrically. The encapsulation effectivity of active substances into particles and the long-term stability of encapsulated components were determined and compared too. The HPLC method was used for measuring of the concentration of drugs and spectrophotometric method was used to quantify the content of polyphenols. Prepared particles were characterized with DLS method (size) and zeta- potential (stability). Finally, antibacterial properties of prepared particles and extracts using the test system Candida glabrata were studied. The antimycotic effect of particles, disturbed liposomes and extracts was compared. Finally, potential utilization of prepared liposomes in a cosmetic or pharmaceutical product is proposed.
Description
Citation
SOSKOVÁ, S. Příprava a charakterizace mikro- a nanočástic s obsahem vybraných léčiv [online]. Brno: Vysoké učení technické v Brně. Fakulta chemická. 2015.
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Document version
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Language of document
cs
Study field
Chemie pro medicínské aplikace
Comittee
prof. Ing. Miloslav Pekař, CSc. (předseda)
prof. RNDr. Ivana Márová, CSc. (místopředseda)
prof. Ing. Oldřich Zmeškal, CSc. (člen)
prof. Ing. Michal Veselý, CSc. (člen)
doc. Ing. Pavel Diviš, Ph.D. (člen)
Date of acceptance
2015-06-19
Defence
Veselý - proč byl použit v receptuře ibuprofen
- měřítko mikrofotografií
Result of defence
práce byla úspěšně obhájena
Document licence
Standardní licenční smlouva - přístup k plnému textu bez omezení