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Effect of pH and other factors on the metabolic conversion of tyrosine kinase inhibitors.
Čillíková, Olívia ; Indra, Radek (advisor) ; Čermáková, Michaela (referee)
Targeted anti-tumor therapy is a modern and effective approach to cancer treatment. This type of therapy includes several groups of anticancer drugs. The second most commonly used group of targeted chemotherapeutic substances are tyrosinkinase inhibitors. These are small- molecular agents that target specific signalling pathways of the tumor cell, thereby inhibiting it's growth, proliferation and angiogenesis. Representatives of this drug group include vandetanib and sunitinib. Vandetanib is primarily used for the treatment of medullary thyroid cancer and sunitinib has been approved for the treatment of gastrointestinal stromal tumor and advanced renal cell carcinoma. The diploma thesis focuses on the effect of pH and temperature on the in vitro metabolism of vandetanib and sunitinib using first-phase biotrasnformation enzymes. Differently premedicated and control rat liver microsomes were used in the experiments. Human and rat recombinant cytochromes P450 were used for comparison. The primary purpose of the experiments was to find the experimental pH and temperature optimum of the in vitro metabolism of vandetanib and sunitinib. These experiments also investigated the effect of pH and temperature on the drugs themselves and their stability. The effect of pH and temperature on the metabolism of the...

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