Agregace hyaluronanu substituovaného palmitoylem
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Vysoké učení technické v Brně. Fakulta chemická
Abstract
V predkladanej diplomovej práci sme sa zaoberali agregačným chovaním skúmanej vzorky palmitoylhyaluronanu v dvoch stupňoch substitúcie a to 10 % a 16 %. Pomocou metódy fluo-rescenčnej spektroskopie s pyrénom ako fluorescenčnou sondou sme našli kritickú micelárnu koncentráciu. Výsledky sme potvrdili meraním dynamického rozptylu svetla, ktorý taktiež vykazoval nárast veľkosti agregátov so zväčšujúcou sa koncentráciou. Koloidná stabilita sys-témov sa vplyvom zvýšenej iónovej sily znižuje, čo dokazuje meranie zeta potenciálu. Experi-mentami sme zistili, že vzorka s 16 % substitúciou je schopná vytvárať gél. Gél je veľmi tuhý a má výborné vlastnosti, čo potvrdila reológia. Taktiež sa podarilo do gélu inkorporovať pyrén, čím sme dokázali prítomnosť hydrofóbnych domén, ktorými by mohli byť polymérne micely. Na základe týchto výsledkov sme vzorku s 16 % substitúciou podrobili MTT testu, ktorým sme zisťovali cytotoxicitu. Výsledky potvrdili, že skúmaná vzorka nie je toxická.
This thesis deals with the aggregation behaviour of palmitoylhyaluronan in two degrees of substitution, namely 10 % and 16 %. Using a fluorescence spectroscopy method with pyrene as a fluorescence probe, we found a critical micellar concentration. The results were confirmed by measuring the dynamic light scattering, which also showed an increase in the size of aggre-gates with an increasing concentration. System stability is reduced by increased ionic strength as evidenced by zeta potential measurement. Experiments found that 16 % substitution sample can form a gel. The gel is very stiff and has excellent properties, which was confirmed by rhe-ology. We also managed to incorporate pyrene in the gel, which was demonstrated by the presence of highly solvated domains that could be polymer micelles. Based on these results, 16% substitution sample was subjected the MTT assay to cytotoxicity. The results confirmed that the examined sample was not toxic.
This thesis deals with the aggregation behaviour of palmitoylhyaluronan in two degrees of substitution, namely 10 % and 16 %. Using a fluorescence spectroscopy method with pyrene as a fluorescence probe, we found a critical micellar concentration. The results were confirmed by measuring the dynamic light scattering, which also showed an increase in the size of aggre-gates with an increasing concentration. System stability is reduced by increased ionic strength as evidenced by zeta potential measurement. Experiments found that 16 % substitution sample can form a gel. The gel is very stiff and has excellent properties, which was confirmed by rhe-ology. We also managed to incorporate pyrene in the gel, which was demonstrated by the presence of highly solvated domains that could be polymer micelles. Based on these results, 16% substitution sample was subjected the MTT assay to cytotoxicity. The results confirmed that the examined sample was not toxic.
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LEHOCKÁ, N. Agregace hyaluronanu substituovaného palmitoylem [online]. Brno: Vysoké učení technické v Brně. Fakulta chemická. 2018.
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cs
Study field
Chemie pro medicínské aplikace
Comittee
prof. Ing. Miloslav Pekař, CSc. (předseda)
prof. RNDr. Ivana Márová, CSc. (místopředseda)
doc. Ing. Pavel Diviš, Ph.D. (člen)
doc. Ing. Petr Dzik, Ph.D. (člen)
doc. Ing. Stanislav Obruča, Ph.D. (člen)
prof. RNDr. Zbyněk Zdráhal, Dr. (člen)
Date of acceptance
2018-05-29
Defence
Márová: Jakým mechanismem interaguje hyaluronan s buňkami?
Obruča: Prosím o vysvětlení obrázku na slajdu 8. Co je vyneseno na vodorovné ose?
Odkud pocházely použité vzorky HA?
Result of defence
práce byla úspěšně obhájena
Document licence
Standardní licenční smlouva - přístup k plnému textu bez omezení