|
|
Vasculature models to study thrombolysis
Schildová, Veronika ; Ambrožová,, Gabriela (referee) ; Víteček, Jan (advisor)
The theoretical part of diploma thesis describes the cardiovascular system and focuses on hemostasis. This is a complex of events which maintain functional blood circulation. Hemostasis includes procoagulant processes responsible for elimination of bleeding as well as anticoagulant processes maintain blood fluidity. If there is an imbalance between procoagulation and anticoagulation, thromboembolic or bleeding diseases will occur. This work is focused on one of the most fatal diseases, ischemic stroke, and its treatment by thrombolytics. These are drugs that accelerate the degradation of the blood clot and the recanalization of the blood vessel. This thesis describes the comparison of the only thrombolytic approved for ischemic stroke – alteplase and its mutant tenecteplase. The experimental part is focused on various types of in vitro models to the study of thrombolysis. These are static model, microplate model, thrombus penetration into fibrin gel and sequestration. Such models are used to compare thrombolytics.
|
|
|
In vitro study of thrombolytic resistance in ischemic stroke
Hložánková, Anna ; Raptová, Petra (referee) ; Víteček, Jan (advisor)
Ischemic stroke is one of the most common causes of mortality and permanent disability worldwide. The most frequently used therapeutic approach in stroke treatment is enzymatic thrombolysis using recombinant tissue plasminogen activator – alteplase. Although alteplase is currently the only clinically approved thrombolytic for the treatment of ischemic stroke, its efficacy is limited. These limitations can be caused by several factors, including the structure and mechanical properties of the clot. The theoretical part of this bachelor thesis is focused on ischemic stroke, its enzymatic therapy, and on the study of factors affecting thrombolytic efficacy. The practical part deals with in vitro preparation of structurally variable clots and the characterization of the effect of their structure on the efficacy of thrombolytic agents and the mechanical properties of clots.
|
|
|
Development of a sensing platform for the study of physiological functions of living cells
Marková, Aneta ; Víteček, Jan (referee) ; Vala, Martin (advisor)
The aim was to develop a sensing platform on the base of organic electrochemical transistor (OECT). The focus was on the preparation of proper electrode system and on optimalization of properties of thin layer of organic semiconductor. As a base, commercial glass substrates with integrated indium-tin oxide electrodes were chosen. Thin layers were prepared from organic semiconductor poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) by spin-coating. Four formulations of material were studied. Layers with different thickness were prepared and the dependence of transconductance on the thickness of the layer and ratio of width and length was observed. The degradation of electrode system was solved by galvanic plating with gold. Attention was also paid to modifications to PEDOT: PSS. It has been found that the optimal layer thickness for use in sensors is approximately 150 nm. By reducing the series resistance by using a silver paste, the transconductance of 23 mS was obtained for the Ink 2, for the Ink 3 the transconductance was 44 mS. Sensoric platforms with these transconductances can be used for detection of physiological functions of electrogenic cells, e.g. cardiomyocytes.
|
|
|
Development of a sensing platform for the study of physiological functions of living cells
Marková, Aneta ; Víteček, Jan (referee) ; Vala, Martin (advisor)
The aim was to develop a sensing platform on the base of organic electrochemical transistor (OECT). The focus was on the preparation of proper electrode system and on optimalization of properties of thin layer of organic semiconductor. As a base, commercial glass substrates with integrated indium-tin oxide electrodes were chosen. Thin layers were prepared from organic semiconductor poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) by spin-coating. Four formulations of material were studied. Layers with different thickness were prepared and the dependence of transconductance on the thickness of the layer and ratio of width and length was observed. The degradation of electrode system was solved by galvanic plating with gold. Attention was also paid to modifications to PEDOT: PSS. It has been found that the optimal layer thickness for use in sensors is approximately 150 nm. By reducing the series resistance by using a silver paste, the transconductance of 23 mS was obtained for the Ink 2, for the Ink 3 the transconductance was 44 mS. Sensoric platforms with these transconductances can be used for detection of physiological functions of electrogenic cells, e.g. cardiomyocytes.
|
|
| |
guest ::
RSS feed.