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| Content Provider | Springer Nature Link |
|---|---|
| Author | Gonzalez Covarrubias, Vanessa Kalabus, James L. Blanco, Javier G. |
| Copyright Year | 2008 |
| Abstract | Carbonyl reductase 1 (CBR1) reduces the anticancer anthracyclines doxorubicin and daunorubicin into the cardiotoxic metabolites doxorubicinol and daunorubicinol. We evaluated whether the cardioprotectant monoHER inhibits the activity of polymorphic CBR1.We performed enzyme kinetic studies with monoHER, CBR1 (CBR1 V88 and CBR1 I88) and anthracycline substrates. We also characterized CBR1 inhibition by the related flavonoids triHER and quercetin.MonoHER inhibited the activity of CBR1 V88 and CBR1 I88 in a concentration-dependent manner. The IC$_{50}$ values of monoHER were lower for CBR1 I88 compared to CBR1 V88 for the substrates daunorubicin and doxorubicin (daunorubicin, IC$_{50}$-CBR1 I88 = 164 μM vs. IC$_{50}$-CBR1 V88 = 219 μM; doxorubicin, IC$_{50}$-CBR1 I88 = 37 μM vs. IC$_{50}$-CBR1 V88 = 59 μM; p < 0.001). Similarly, the flavonoids triHER and quercetin exhibited lower IC$_{50}$ values for CBR1 I88 compared to CBR1 V88 (p < 0.001). MonoHER acted as a competitive CBR1 inhibitor when using daunorubicin as a substrate Ki = 45 ± 18 μM. MonoHER acted as an uncompetitive CBR1 inhibitor for the small quinone substrate menadione Ki = 33 ± 17 μM.The cardioprotectant monoHER inhibits CBR1 activity. CBR1 V88I genotype status and the type of anthracycline substrate dictate the inhibition of CBR1 activity. |
| Starting Page | 1730 |
| Ending Page | 1734 |
| Page Count | 5 |
| File Format | |
| ISSN | 07248741 |
| Journal | Pharmaceutical Research |
| Volume Number | 25 |
| Issue Number | 7 |
| e-ISSN | 1573904X |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2008-05-01 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biomedical Engineering Medical Law Biochemistry Pharmacy Pharmacology/Toxicology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Pharmacology Molecular Medicine Pharmacology (medical) Biotechnology Pharmaceutical Science |
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