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Immunomodulation using two types of ligands
Adámek, David ; Bezouška, Karel (advisor) ; Pompach, Petr (referee)
CD69 and NKR-P1 are receptors belonging to C-lectin family of receptors. We have recently identified two types of effective ligands for these receptors: dimeric N-acetyl-D-glukosamines (activators) and (calix[4]arenes) inhibitors. By using them, we can modulate immune response. First class of ligands (N-acetyl-D-glukosamines) is able to bind to CD69 and NKR-P1 and activate the cells. Second class of ligands (calix[4]arenes) is able to effectively inhibit functions of CD69, but not functions of NKR-P1. The aim of this study was to learn how to modulate immune response by various combinations of these compounds, and to explore their concentrations suitable for tumor therapies. Effect of used ligand and their combinations was studied in standard tests of cell proliferation, cell death and cytotoxic killing.
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Electrochemical studies of the analytical utilization of self-assembled monolayers of calix[4]arene on the surface of polycrystalline gold electrode
Hrdlička, Vojtěch ; Navrátil, Tomáš (advisor) ; Ludvík, Jiří (referee)
This MSc. Thesis deals with electrochemical studies of the analytical utilization of self-assembled monolayers of thiolated calix[4]arene (C4A) and/or undecanthiole (C11SH) on the surface of a polycrystalline gold electrode. Hydroquinone, nitrobenzene, 2-nitrophenole and 4-nitrophenole have been used as tested model compounds. The real surface area of the electrode was determined using these two methods: From the charge of desorption peak of α-gold oxides (5.72±0.48 mm2 ) and using the Randles- Ševčík equation. (6.14±0.59 mm2 ). The preparation of the electrode consisted of polishing on alumina, immersing into piranha solution and cyclic voltammetry. The area of electrode surface was well reproducible. Stability of thiol monolayer in the area of negative potentials was tested. The C11SH layer is very stable; the desorption peak was recorded in basic solutions only (at −1.3 V vs. 3M Ag/AgCl). The position of the desorption peak of C4A is more pH dependent and it was recorded at −1.08 V at pH 13. The properties of the electrode modified by C11SH and or C4A were investigated using the model compound hydroquinone. It is assumed that the oxidation of the hydroquinone does not take place inside the C4A cavity; hence the hydroquinone molecule is too big to pass through the cavity. C11SH and C4 + C11SH act...
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Electrochemical studies of the analytical utilization of self-assembled monolayers of calix[4]arene on the surface of polycrystalline gold electrode
Hrdlička, Vojtěch ; Navrátil, Tomáš (advisor) ; Ludvík, Jiří (referee)
This MSc. Thesis deals with electrochemical studies of the analytical utilization of self-assembled monolayers of thiolated calix[4]arene (C4A) and/or undecanthiole (C11SH) on the surface of a polycrystalline gold electrode. Hydroquinone, nitrobenzene, 2-nitrophenole and 4-nitrophenole have been used as tested model compounds. The real surface area of the electrode was determined using these two methods: From the charge of desorption peak of α-gold oxides (5.72±0.48 mm2 ) and using the Randles- Ševčík equation. (6.14±0.59 mm2 ). The preparation of the electrode consisted of polishing on alumina, immersing into piranha solution and cyclic voltammetry. The area of electrode surface was well reproducible. Stability of thiol monolayer in the area of negative potentials was tested. The C11SH layer is very stable; the desorption peak was recorded in basic solutions only (at −1.3 V vs. 3M Ag/AgCl). The position of the desorption peak of C4A is more pH dependent and it was recorded at −1.08 V at pH 13. The properties of the electrode modified by C11SH and or C4A were investigated using the model compound hydroquinone. It is assumed that the oxidation of the hydroquinone does not take place inside the C4A cavity; hence the hydroquinone molecule is too big to pass through the cavity. C11SH and C4 + C11SH act...
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Immunomodulation using two types of ligands
Adámek, David ; Pompach, Petr (referee) ; Bezouška, Karel (advisor)
CD69 and NKR-P1 are receptors belonging to C-lectin family of receptors. We have recently identified two types of effective ligands for these receptors: dimeric N-acetyl-D-glukosamines (activators) and (calix[4]arenes) inhibitors. By using them, we can modulate immune response. First class of ligands (N-acetyl-D-glukosamines) is able to bind to CD69 and NKR-P1 and activate the cells. Second class of ligands (calix[4]arenes) is able to effectively inhibit functions of CD69, but not functions of NKR-P1. The aim of this study was to learn how to modulate immune response by various combinations of these compounds, and to explore their concentrations suitable for tumor therapies. Effect of used ligand and their combinations was studied in standard tests of cell proliferation, cell death and cytotoxic killing.
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