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Preparation and characterisation of mRNA/DNA transfection vectors
Horák, Tomáš ; Chmelíková, Larisa (referee) ; Skopalík, Josef (advisor)
This diploma thesis deals with genetic engineering, especially the transfection of DNA into MSCs (Mesenchymal stromal cells) and dendritic cells. Both lipoplexes and metal magnetic nanoparticles were tested to introduce the vector into cells. The research was focused on finding more efficient methods of transfection. According to analysis on MADLS and gel electrophoresis, aspects playing an important role in conjugation and subsequent transfection were found. Conjugation occurs after only 4 minutes, as evidenced by an increase in zeta potential, but to achieve full conjugation it is necessary to incubate the sample for 20 minutes. Incomplete conjugation to iron nanoparticles resulted in strong carrier-carrier interactions, which formed an unwanted conglomerates. Encapsulation into liposomes with cationic surface treatment was without complications. The success rate of GFP-labeled protein expression after transfection by these methods was calculated to be 95%, resp. 91%. This result is due to low cytotoxicity. However, commercial tested kits on dendritic cells had a success rate below 5% with high cytotoxicity.
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Induction of beta-cell proliferation by synthetic modified mRNAs encoding cell cycle regulators
Ivanovská, Dana ; Koblas, Tomáš (advisor) ; Černá, Věra (referee)
Diabetes mellitus is a metabolic disease associated with a high blood glucose level over a prolonged period of time. Hyperglycemia is caused by the loss of pancreatic insulin producing beta cells. Diabetes mellitus II is linked with insulin resistence, which can indirectly lead to beta cell deficiency. It logically follows that the replacement or regeneration of beta cells could lead to a successful remission of diabetes. D type cyclins (D1, D2, D3) and cyclin-dependent kinases (Cdk) 4/6 appear to have the potential to induce beta cell proliferation. These proteins are responsible for driving cell mitotic entry. The aim of this bachelor thesis was to verify the possibility of inducing beta cell proliferation via D type and Cdk4/6 synthetic mRNA transfection. In vitro-synthesized mRNA induces short-therm protein overexpression. Cyclins harboring mutations are characterized by a higher protein stability and an increased half-life. The presence of D type cyclins and Cdk4/6 after cell transfection was detected using indirect immunofluorescence. Also a Western blot analysis with subsequent immunodetection was performed. Transfecting rat islet cells with various D type cyclins and Cdk4/6 mRNA combinations has shown to lead to a significant induction of beta cell proliferation. The levels of beta cell...
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Preparation and characterisation of mRNA/DNA transfection vectors
Horák, Tomáš ; Chmelíková, Larisa (referee) ; Skopalík, Josef (advisor)
This diploma thesis deals with genetic engineering, especially the transfection of DNA into MSCs (Mesenchymal stromal cells) and dendritic cells. Both lipoplexes and metal magnetic nanoparticles were tested to introduce the vector into cells. The research was focused on finding more efficient methods of transfection. According to analysis on MADLS and gel electrophoresis, aspects playing an important role in conjugation and subsequent transfection were found. Conjugation occurs after only 4 minutes, as evidenced by an increase in zeta potential, but to achieve full conjugation it is necessary to incubate the sample for 20 minutes. Incomplete conjugation to iron nanoparticles resulted in strong carrier-carrier interactions, which formed an unwanted conglomerates. Encapsulation into liposomes with cationic surface treatment was without complications. The success rate of GFP-labeled protein expression after transfection by these methods was calculated to be 95%, resp. 91%. This result is due to low cytotoxicity. However, commercial tested kits on dendritic cells had a success rate below 5% with high cytotoxicity.
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Exprese proteinu NS5 viru klíšťové encefalitidy v lidských neurálních buňkách
JAKLOVÁ, Kateřina
This study focuses on the detection of tick-borne encephalitis virus (TBEV) NS5 protein in infected and NS5-transfected DAOY HTB-186 human neural cells. TBEV NS5 protein was shown to localize mainly on the membranes of the endoplasmic reticulum. An interesting finding was also nuclear localization, which is supported by the obtained data from both, confocal microscopy and subcellular fractionation.
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Porovnání promotorů pro využití v klíštěcím (\kur{Ixodes}) expresním systému
MUSTACOVÁ, Johana
Gene manipulation can be a convenient tool for tick control, however functional procedure for gene manipulation of ticks was not determined yet. The creation of plasmid vectors with high ability of gene expression driven by functional promoters is crucial for genetically modified ticks. To investigate effective tools for tick genes manipulation within the scope of this master thesis, transfection procedures for various types of Ixodes tick cell lines were optimized. As well as expression vectors for use in tick cells were tested. For this purpose, expression plasmid vectors containing luciferase reporter genes driven by eukaryotic and viral promoters were used.
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Preparation and characterization of diamond-based nanocarriers for transfection of siRNA
Majer, Jan ; Cígler, Petr (advisor) ; Fišer, Radovan (referee)
Although nanodiamonds were discovered and produced tens of years ago, they have been utilized in medical and biological fields just recently, particularly in drug and gene delivery into a cell and in bioimaging methods. Nanodiamonds can be modified with specific positively charged moieties for complexation with negatively charged nucleic acids. These complexes afterwards overcome extracellular and intracellular barriers and transport the nucleic acid either into cytosol or into the nucleus. Owing to fluorescence centres nitrogen- vacancy, which can be formed in the nanodiamonds, nanodiamonds exhibit excelling optical properties, as they emit stable fluorescence without "photoblinking" or "photobleaching". This thesis reviews properties, synthesis and modifications of nanodiamonds and other selected nanoparticles and their in vitro applications. This thesis also compares their cytotoxicity and gene knockdown efficiency.
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Reporter gene studies for nanoparticle mediated DNA and siRNA delivery.
Kovářová, Barbora ; Jirkovská, Anna (advisor) ; Hofman, Jakub (referee)
Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biochemical Sciences University of Vienna, Faculty center for Pharmacy, Department of Pharmaceutical Chemistry, Laboratory of MacroMolecular Cancer Therapeutics Candidate: Barbora Kovářová Supervisor (Charles University): PharmDr. Anna Jirkovská, Ph.D. Supervisor (University of Vienna): Univ. Prof. Dipl. Ing. Dr. Manfred Ogris Co-supervisor (University of Vienna): Dr. Haider Sami, Ph.D. Title of diploma thesis: Reporter gene studies for nanoparticle mediated DNA and siRNA delivery Keywords: transfection, plasmid DNA, siRNA, nanoparticles Gene therapy is a promising field offering potential in several currently incurable diseases. Gene therapy is mediated by modulation of gene expression in specific cells by delivering exogenous nucleic acids. One of current tasks of nucleic acid delivery is exploring several synthetic vectors which would have a potential to overcome the disadvantages of commonly used viral vectors. The present study focused on different types of polyethyleneimine-based nanoparticles for plasmid DNA (pDNA) and small interfering RNA (siRNA) delivery. Integration of imaging contrast agents with gene delivery vehicles is advantageous for tracking the gene delivery process both in vivo and in vitro. Gadolinium...
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Transport studies in vitro on 2D and 3D cellular level
Urbanová, Johana ; Ramos Mandíková, Jana (advisor) ; Smutná, Lucie (referee)
Farmaceutická fakulta v Hradci Králové Studentka: Johana Urbanová Školitelka: PharmDr. Jana Ramos Mandíková, Ph.D. Název diplomové práce: Transportní studie na 2D a 3D buněčné úrovni. Trojrozměrné (3D) buněčné modely lépe napodobují buněčné podmínky in vivo než tradičně používané dvourozměrné (2D) buněčné modely. Transportéry pro organické anionty (OATs) a kationty (OCTs) hrají důležitou úlohu v ledvinné eliminaci léčiv a mají vliv na jejich farmakokinetické vlastnosti. Cílem práce bylo vytvořit 2D a 3D buněčný model z embryonálních ledvinných buněk HEK293, oba modely přechodně transfekovat transportérem hOAT1, transfekci optimalizovat a provést transportní inhibiční studie s vybranými NSAIDs (diklofenakem, ibuprofenem, indometacinem a naproxenem). 2D buněčný model jsme vytvořili ve 24jamkové destičce ve formě monovrstvy, jako 3D buněčný model jsme používali sféroidy, které jsme zhotovili na Petriho misce metodou visící kapky. Při transportních studiích jsme buňky inkubovali s radioaktivním substrátem OATs p-aminohippurovou kyselinou ([3 H]PAH) s nebo bez příslušného inhibitoru. Inhibiční vliv NSAIDs jsme porovnávali pomocí parametru IC50. 2D i 3D model z buněk HEK293 se nám povedlo vytvořit, ale následná transfekce byla úspěšná pouze v monovrstvě buněk. Funkčnost 3D modelu se pomocí transportní studie...
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IN VITRO assays for investigating nucleic acid delivery.
Mihaličoková, Dajana ; Jirkovská, Anna (advisor) ; Matoušková, Petra (referee)
Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biochemical Sciences University of Vienna, Faculty center for Pharmacy, Department of Pharmaceutical Chemistry, Laboratory of MacroMolecular Cancer Therapeutics Candidate: Dajana Mihaličoková Supervisor (Charles University): PharmDr. Anna Jirkovská, Ph.D. Supervisor (University of Vienna): Univ.Prof. Dipl. Ing. Dr. Manfred Ogris Co-supervisor (University of Vienna): Dr. Haider Sami, Ph.D. Title of diploma thesis: In vitro assays for investigating nucleic acid assay Keywords: transfection, splice correction, BCA assay, polyplexes One of the most important tasks of biochemical research is to find out the right way how to cure cancer, genetic disorders and other illnesses which are still not curable. Towards this, gene therapy is emerging as a potential treatment owing to its ability to deliver genetic material inside the cell. Reporer gene based transfection process can be used to study gene expression. Transfection is mediated by vectors, either of viral or non-viral origin. Non-viral vectors offer several advantages over the viral counterparts like easier to synthesize, relatively cheap and the most important is their non-immunogenicity. Cationic polymers based on polyethylenimine form complexes with plasmid DNA reffered to as...
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