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Title:Vpliv endotelija na tonus arterij - teorija in modeli
Authors:ID Opaka, Nina (Author)
ID Fajmut, Aleš (Mentor) More about this mentor... New window
ID Lipovšek Delakorda, Saška (Mentor) More about this mentor... New window
ID Gosak, Marko (Comentor)
Files:.pdf UNI_Opaka_Nina_2013.pdf (1,98 MB)
MD5: B814608A46113CD136983E1D9C573090
PID: 20.500.12556/dkum/24b05759-40b1-44b8-b246-56c33d59c1d1
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:V diplomskem delu so podrobneje opisani procesi, ki vodijo do relaksacije gladke mišične celice in izvirajo iz endotelija. Osrednja tema naloge je opis in študij ključnega vazorelaksanta, ki se proizvaja v endoteliju, to je dušikov oksid (NO). V delu je opisan proces njegove sinteze in njegov vpliv na od kalcija odvisno relaksacijo gladke mišične celice. Najprej je opisan proces krčenja/relaksacije gladke mišične celice in celična signalizacijo ter pomen kalcija v celici. Podrobneje so opisane različne funkcije, na katere vpliva NO. Z matematičnim modelom je opisana sinteza NO iz L-arginina, ki ga katalizira encim endotelijska NO sintaza (eNOS). Pri tem je predstavljeno spreminjanje hitrosti nastajanja NO, nitrita in L-citrulina ter porabe kisika in nikotinamid adenin dinukleotid fosfat-oksidaze (NADPH). Prikazana je tudi odvisnost koncentracije NO od koncentracije O2 v celici. Teoretično je opisano delovanje encima endotelijske NO sintaze in različni vplivi na aktivacijo le-tega. Opisane so različne molekule, ki predstavljajo tarče za NO. Mehanizem aktivacije gvanilat ciklaze je opisan z matematičnim modelom. Predstavljeni so še drugi mehanizmi signalizacije v gladki mišični celici. Z matematično-fizikalnim modelom je opisana dinamika kalcija v gladki mišični in endotelijski celici, pri čemer se osredotočimo na znotrajcelično dinamiko koncentracije kalcija v citosolu tako izolirane gladke mišične celice kakor tudi sklopljenega para gladke mišične celice in endotelijske celice.
Keywords:dušikov oksid, gladka mišična celica, endotelijska celica, endotelijska NO sintaza, gvanilat ciklaza
Place of publishing:Maribor
Publisher:[N. Opaka]
Year of publishing:2013
PID:20.500.12556/DKUM-40319 New window
UDC:611.018.61(043.2)
COBISS.SI-ID:19870472 New window
NUK URN:URN:SI:UM:DK:TRJNY68O
Publication date in DKUM:28.05.2013
Views:2770
Downloads:322
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Secondary language

Language:English
Title:Impact of endothelium on arterial tone - theory and models
Abstract:In the thesis we describe processes that lead to smooth muscle cell relaxation and originate from endothelium. The main topic of the thesis is study and description of key vasorelaxant that is produced in endothelium, which is nitric oxide. We discuss the process of its synthesis and its effect on calcium dependent relaxation of smooth muscle cells. First, it describes the process of contraction / relaxation of smooth muscle cells and cell signaling, and the importance of calcium in the cell. Different functions that are affected by NO are described more specifically. We use a mathematical model to describe the synthesis of NO from L-arginine, which is catalyzed by the enzyme endothelial NO synthase (eNOS). Enzyme endothelial NO synthase and effects of various substances on its activation are described theoretically. We also present variety of molecules that represent targets for NO. The mechanism of activation of guanylate cyclase is described with a mathematical model. We also describe other signaling mechanisms in smooth muscle cells. We use the third mathematical model to describe the dynamics of calcium in the smooth muscle and endothelial cells, focusing on the dynamics of intracellular calcium concentration in the cytosol of isolated smooth muscle cell as well as coupled pair of smooth muscle cell and endothelial cell.
Keywords:nitric oxide, smooth muscle cell, endothelial cell, endothelial NO synthase, guanylate cyclase


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