@ARTICLE{Knapik-Czajka_Małgorzata_The_2022,
 author={Knapik-Czajka, Małgorzata and Gawędzka, Anna and Jurczyk, Michał and Drąg, Jagoda and Belczyk, Małgorzata and Aleksandrovych, Veronika and Gil, Anna and Gil, Krzysztof},
 volume={Vol. 62},
 number={No 2},
 journal={Folia Medica Cracoviensia},
 pages={27-35},
 howpublished={online},
 year={2022},
 publisher={Oddział PAN w Krakowie; Uniwersytet Jagielloński – Collegium Medicum},
 abstract={5-fluorouracil (5-FU), which is a commonly used chemotherapy agent exerts undesired cardiac toxicity. Mitochondrial dysfunction is thought to be one of potentially important mechanisms of 5-FU- induced cardiotoxicity. α-ketoglutarate dehydrogenase (α-KGDHC) is the key regulatory enzyme of TCA cycle. The complex consists of multiple copies of three catalytic subunits: α-ketoglutarate dehydrogenase (E1), dihydrolipoamide succinyltransferase (E2) and dihydrolipoamide dehydrogenase (E3). α-KGDHC together with branched chain α-ketoacid dehydrogenase (BCKDHC) and pyruvate dehydrogenase (PDHC), are the members of 2-oxoacid dehydrogenases family that share some structural and functional similarities. Recently, it has been found that 5-FU stimulates BCKDHC in rat’s cardiac muscle. Therefore, we hypothesize that 5-FU modifies α-KGDHC activity and affects cardiac muscle metabolism. The aim of this study was to determine the effect of 5-FU on α-KGDHC activity and protein levels of E1 and E2 subunits of the complex in rat’s cardiac muscle. Wistar male rats were administered with 4 doses of 5-FU, 150 mg/kg b.wt. each (study group) or 0.3% methylcellulose (control group). α-KGDHC activity was assayed spectrophotometrically. The E1 and E2 proteins levels were quantified by Western blot. 5-FU administration resulted in stimulation of myocardial α-KGDHC activity in rats. In addition, E2 protein level increased in response to 5-FU treatment, while the E1 protein level remained unchanged. Up- regulation of α-KGDHC appears to result from change in E2 subunit protein level. However, the effect of 5-FU on factors modifying α-KGDHC activity at post-translational level cannot be excluded.},
 type={Article},
 title={The influence of 5-fluorouracil on the α-ketoglutarate dehydrogenase complex in rat’s cardiac muscle — a preliminary study},
 URL={http://journals.pan.pl/Content/125137/PDF/2022-02-FMC-03.pdf},
 doi={10.24425/fmc.2022.141705},
 keywords={5-fluorouracil, α-ketoglutarate dehydrogenase, rats, cardiac muscle},
}