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The role of Arachidonic acid metabolites in cardiovascular system and signaling of heart failure
Liptáková, Andrea ; Žurmanová, Jitka (advisor) ; Holzerová, Kristýna (referee)
Arachidonic acid (AA) is polyunsaturated acid that plays an important role in regulation of physiology, bioenergetic and signalling cascades in the heart. AA released by phospholipase A2-catalysed hydrolysis of membrane phospholipids serves as substrate for cyclooxygenase, lipooxygenase and cytochrome P450 epoxygenase to produce a wide spectrum of lipid second messengers, eicosanoids. These very biologically potent molecules regulate a number of cellular processes in the cardiovascular system and changes in their composition and concentration significantly contribute to heart failure. The aim of this thesis was to summarize current knowledge about the role of AA in failing heart. Keywords : Heart, Arachidonic Acid, Heart Failure, Eicosanoids, Cardiovascular System
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Targeted analysis of eicosanoids by LC/MS
Moravcová, Marie ; Kuda, Ondřej (advisor) ; Kozlík, Petr (referee)
Eicosanoids represent large group of biologically active lipid metabolites syntesized from polyunsaturated fatty acids that play an important role in many physiological processes. To describe complex metabolism of these compounds, analytical methods including extraction from a biological sample using solid phase extraction and liquid chromatography coupled with mass spectrometer detection were used. Solid phase extraction of biological samples was optimized on four types of reverse phase columns of which column Strata X 60 mg/3 ml, 33 um (Phenomenex , USA) was the most effective. Also, alternative solid phase extraction of eicosanoids using columns with ion exchange sorbents and a column with normal phase were tested, but proved to be unsuitable for targeted analysis of eicosanoids. The extraction method yielding the best results - Strata X 60 mg/3 ml, 33 µm (Phenomenex, USA) was used for the separation of eicosanoids from mouse gonadal fat samples. Eicosanoids were analyzed by liquid chromatography and the separation mechanisms were tested on three UPLC core-shell columns of different lengths (50 mm, 100 mm, 150 mm). The most effective separation of prostaglandin E2 and prostaglandin D2 was achieved using the longest column Kinetex 150 mm × 2,1 mm, 2,6 µm. Furthermore, ionization parameters, such...
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The role of Arachidonic acid metabolites in cardiovascular system and signaling of heart failure
Liptáková, Andrea ; Žurmanová, Jitka (advisor) ; Holzerová, Kristýna (referee)
Arachidonic acid (AA) is polyunsaturated acid that plays an important role in regulation of physiology, bioenergetic and signalling cascades in the heart. AA released by phospholipase A2-catalysed hydrolysis of membrane phospholipids serves as substrate for cyclooxygenase, lipooxygenase and cytochrome P450 epoxygenase to produce a wide spectrum of lipid second messengers, eicosanoids. These very biologically potent molecules regulate a number of cellular processes in the cardiovascular system and changes in their composition and concentration significantly contribute to heart failure. The aim of this thesis was to summarize current knowledge about the role of AA in failing heart. Keywords : Heart, Arachidonic Acid, Heart Failure, Eicosanoids, Cardiovascular System
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Targeted analysis of eicosanoids by LC/MS
Moravcová, Marie ; Kuda, Ondřej (advisor) ; Kozlík, Petr (referee)
Eicosanoids represent large group of biologically active lipid metabolites syntesized from polyunsaturated fatty acids that play an important role in many physiological processes. To describe complex metabolism of these compounds, analytical methods including extraction from a biological sample using solid phase extraction and liquid chromatography coupled with mass spectrometer detection were used. Solid phase extraction of biological samples was optimized on four types of reverse phase columns of which column Strata X 60 mg/3 ml, 33 um (Phenomenex , USA) was the most effective. Also, alternative solid phase extraction of eicosanoids using columns with ion exchange sorbents and a column with normal phase were tested, but proved to be unsuitable for targeted analysis of eicosanoids. The extraction method yielding the best results - Strata X 60 mg/3 ml, 33 µm (Phenomenex, USA) was used for the separation of eicosanoids from mouse gonadal fat samples. Eicosanoids were analyzed by liquid chromatography and the separation mechanisms were tested on three UPLC core-shell columns of different lengths (50 mm, 100 mm, 150 mm). The most effective separation of prostaglandin E2 and prostaglandin D2 was achieved using the longest column Kinetex 150 mm × 2,1 mm, 2,6 µm. Furthermore, ionization parameters, such...
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