Pharmacokinetic drug resistance is a serious obstacle that emerges during cancer chemotherapy. In this study, we investigated the possible role of aldo-keto reductase 1C3 (AKR1C3) in the resistance of cancer cells to anthracyclines. First, the reducing activity of AKR1C3 toward anthracyclines was tested using incubations with a purified recombinant enzyme. Furthermore, the intracellular reduction of daunorubicin and idarubicin was examined by employing the transfection of A549, HeLa, MCF7 and HCT 116 cancer cells with an AKR1C3 encoding vector. To investigate the participation of AKR1C3 in anthracycline resistance, we conducted MTT cytotoxicity assays with these cells, and observed that AKR1C3 significantly contributes to the resistance of cancer cells to daunorubicin and idarubicin, whereas this resistance was reversible by the simultaneous administration of 2'-hydroxyflavanone, a specific AKR1C3 inhibitor. In the final part of our work, we tracked the changes in AKR1C3 expression after anthracycline exposure. Interestingly, a reciprocal correlation between the extent of induction and endogenous levels of AKR1C3 was recorded in particular cell lines. Therefore, we suggest that the induction of AKR1C3 following exposure to daunorubicin and idarubicin, which seems to be dependent on endogenous AKR1C3 expression, eventually might potentiate an intrinsic resistance given by the normal expression of AKR1C3. In conclusion, our data suggest a substantial impact of AKR1C3 on the metabolism of daunorubicin and idarubicin, which affects their pharmacokinetic and pharmacodynamic behavior. In addition, we demonstrate that the reduction of daunorubicin and idarubicin, which is catalyzed by AKR1C3, contributes to the resistance of cancer cells to anthracycline treatment.

• MeSH
• 3-hydroxysteroid dehydrogenasy antagonisté a inhibitory   genetika   metabolismus   MeSH
• antibiotika antitumorózní agonisté   metabolismus   farmakologie   MeSH
• antracykliny agonisté   metabolismus   farmakologie   MeSH
• biotransformace MeSH
• chemorezistence * účinky léků   MeSH
• daunomycin agonisté   metabolismus   farmakologie   MeSH
• doxorubicin metabolismus   farmakologie   MeSH
• enzymová indukce účinky léků   MeSH
• flavanony farmakologie   MeSH
• hydroxyprostaglandindehydrogenasy antagonisté a inhibitory   genetika   metabolismus   MeSH
• idarubicin agonisté   metabolismus   farmakologie   MeSH
• inhibitory enzymů farmakologie   MeSH
• karcinom farmakoterapie   MeSH
• kinetika MeSH
• lidé MeSH
• nádorové buněčné linie MeSH
• nádorové proteiny antagonisté a inhibitory   genetika   metabolismus   MeSH
• oxidace-redukce MeSH
• rekombinantní proteiny chemie   metabolismus   MeSH
• synergismus léků MeSH
• viabilita buněk účinky léků   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH