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The effect of methamphetamine on the neuroimmune system
Petrášová, Blanka ; Hejnová, Lucie (advisor) ; Lapka, Marek (referee)
Metamphetamine is worldwide problem and in the Czech republic is 2-3 % of people older than 15 years exposed to it. There are 34,7 thousand long-term users in Czech republic and 19 methamphetamine-related deaths in 2022. The impact on the neuroimmune system has only started to be studied in recent years. Understanding its effect on the neuroimmune system may outline new treatment options, as there is no cure for methamphetamine addiction to date. This paper summarizes its effects on the different components of the neuroimmune system and outlines some substances that could be used in treatment. Key words: methamphetamine, neuroimmune system, inflammation, microglia, astrocytes
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Designer drugs derived from phenethylamine in relation to the dopaminergic system
Leová, Mara ; Hejnová, Lucie (advisor) ; Lapka, Marek (referee)
The focus of this thesis is on designer drugs structurally derived from phenylethylamine, a trace amine that is a component of dopamine's structure and plays a crucial role in its functioning within the human organism. The dopaminergic system, in general, is vital for regulating mood, motivation, and, last but not least, the mechanisms of addiction. The ratio by which different substances affect the concentration of dopamine and serotonine in the synaptic cleft serves as a significant marker for determining the likelihood of developing addiction to a particular substance. The main body of this thesis comprises groups of phenylethylamine derivatives, their structural descriptions, metabolism, and their potential for abuse. Key words: dopamine, dopaminergic system, phenethylamine, designer drugs, novel psychoactive substances
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Investigation of the involvement of central ghrelin signalling in methamphetamine dependence using behavioural and molecular methods
Lapka, Marek ; Šustková, Magdaléna (advisor) ; Votava, Martin (referee) ; Amchová, Petra (referee)
v anglickém jazyce Interest in appetite-inducing peptide hormones, such as ghrelin, is gradually increasing. There is a growing number of publications dealing with the involvement of this orexigenic peptide in the mechanisms of obesity and various addictive behaviours, not excluding addiction to stimulant substances including methamphetamine. Central ghrelin signaling appears to play an important role in addictive behavior, and in the processing of memory traces. Recently, antagonism of the ghrelin receptor for growth hormone secretion (GHS-R1A) has been proposed as a promising tool for the still unsatisfactory treatment of methamphetamine addiction. Premedication with a commonly used experimental GHS-R1A antagonist, the triazole derivative, JMV2959, significantly reduced the rewarding and reinforcing effects of methamphetamine in several animal models of addiction. However, the molecular aspects of GHS-R1A involvement in specific brain regions related to the addiction process remain unclear. This work demonstrates that acute and subchronic (4 days) administration of JMV2959 alone, at doses significantly effective in addiction models (1 and 3 mg/kg intraperitoneally), had no effect on memory functions tested in the Morris water maze in rats, as well as no significant effects on molecular markers...
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Drug interactions of gastrointestinal drugs
Lapka, Marek ; Malý, Josef (advisor) ; Marešová, Helena (referee)
Drug interactions of gastrointestinal remedies Author: Marek Lapka Tutor: Josef Malý1 1 Department of Clinical and Social Pharmacy, Charles University in Prague, Faculty of Pharmacy in Hradec Králové Background: Drug interactions may be a serious cause of toxicity and undesirable drug effects. There is a direct proportion to side effect incidence caused by drug interactions and number of used drugs. The issue is a significant constituent of pharmaceutical care. The aim of dissertation: The aim of the thesis was to process available information, suggest a posible solution and create compact overview which can be taken into consideration by pharmacist in order to achieve optimal pharmacotherapy. Methods: Drug combinations, which interactions had clinical evaluation from "moderate severity" to "major severity" were collected from the fundamental information source, Vademecum infopharm aplication. Only currently registered drugs to 1st September 2013 by State Institute for Drug Controle were chosen and then medicinal products of which route of administration enables systemic effect. Furthermore the combination was compared with Micromedex database or Stockley's Drug Interactions Pharmaceutical Press, or both. Pubmed database (www.pubmed.gov) with entering key words "drug interaction", "basic drug" and...
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