Hipoksijas inducētā faktora (HIF – 1alfa) izpēte šūnu līniju un izolētās sirds modeļos
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Latvijas Universitāte
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Abstract
Hipoksijas inducētais faktors (HIF) ir nozīmīgs transkripcijas faktors, kura funkcija ir
nodrošināt celulāro homeostāzi hipoksijas gadījumā. Hipoksijas laikā HIF-1α akumulējas un
izraisa gēnu ekspresiju, kuri piedalās glikolīzē, mitohondriju funkcionēšanā un apoptozē.
Mildronāts ir karnitīna biosintēzes inhibitors, kas ietekmē enerģijas metabolismu sirds audos.
Tā kā gan HIF-1α, gan mildronāts darbojas kardioprotektīvi un ietekmē glikozes metabolismā
iesaistīto gēnu ekspresiju, tad tika izvirzīta hipotēze, ka mildronāts varētu veicināt HIF-1α
akumulāciju. Darba mērķis bija izpētīt mildronāta ietekmi uz HIF-1α daudzumu šūnu līniju un
izolētās sirds modeļos normoksijas un hipoksijas apstākļos. Pētījumos tika noskaidrots, ka
mildronāts statistiski ticami neietekmēja HIF-1α daudzumu in vitro un ex vivo modeļos.
Atslēgvārdi: HIF, mildronāts, hipoksija
The transcriptional complex hypoxia-inducible factor (HIF) has emerged as a key regulator of the molecular hypoxic response. During hypoxia, HIF-1α levels accumulate and trigger an increase in expression of genes involved in glycolysis, mitochondrial function, and apoptosis. Mildronate is an inhibitor of carnitine biosynthesis which regulates energy metabolism in heart tissues. Based on the fact that both mildronate, and HIF-1α are cardioprotectors, and regulate expression of genes involved in glucose metabolism, there was defined the aim of this study – to investigate the effects of mildronate on HIF-1α accumulation in the cell cultures, and isolated mice hearts under normoxic and hypoxic conditions. The results of the present study provide evidence that mildronate does not have significant effects on HIF-1α accumulation in vitro, and ex vivo. Keywords: HIF, mildronate, hypoxia
The transcriptional complex hypoxia-inducible factor (HIF) has emerged as a key regulator of the molecular hypoxic response. During hypoxia, HIF-1α levels accumulate and trigger an increase in expression of genes involved in glycolysis, mitochondrial function, and apoptosis. Mildronate is an inhibitor of carnitine biosynthesis which regulates energy metabolism in heart tissues. Based on the fact that both mildronate, and HIF-1α are cardioprotectors, and regulate expression of genes involved in glucose metabolism, there was defined the aim of this study – to investigate the effects of mildronate on HIF-1α accumulation in the cell cultures, and isolated mice hearts under normoxic and hypoxic conditions. The results of the present study provide evidence that mildronate does not have significant effects on HIF-1α accumulation in vitro, and ex vivo. Keywords: HIF, mildronate, hypoxia