Cited by 98Aldose Reductase and TaurineSteroid Chemistry and BiochemistryPharmacogenetics and Drug Metabolism

Selective and potent inhibitors of human 20α-hydroxysteroid dehydrogenase (AKR1C1) that metabolizes neurosteroids derived from progesterone

Higaki, Yu, Usami, Noriyuki, Shintani, Syunichi, Ishikura, Shuhei, El-Kabbani, Ossama, Hara, Akira·2003·Chemico-Biological Interactions

Abstract

Neuroactive steroids, such as 3alpha,5alpha-tetrahydroprogesterone (3alpha,5alpha-THP) and 3alpha,5alpha-tetrahydrodeoxycorticosterone have been shown to be synthesized from progesterone in animal brains. Comparison of kinetic constants for the neuroactive steroids and their precursors among four human 3(20)alpha-hydroxysteroid dehydrogenases (AKR1C1-AKR1C4) suggests that AKR1C1 and AKR1C2 are involved in the catabolism and synthesis, respectively, of the neuroactive steroids in the human brain. In our efforts to identify agents that would specifically inhibit the two enzymes, benzbromarone and 3',3",5',5"-tetrabromophenolphthalein were found to be relatively selective and potent inhibitors of AKR1C1. Kinetic analyses in the oxidoreduction catalyzed by AKR1C1 in the presence of the inhibitors suggest that the inhibitors bind to the enzyme-NADP(H) complex (K(i)=0.7 nM) in the ordered bi-bi pathway, including an isomerization step. The inhibitors effectively also decreased the reduction of 3alpha,5alpha-THP to its 20alpha-hydroxy metabolite in HepG2 cells treated with ethacrynic acid.

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Crossref · 10.1016/s0009-2797(02)00206-5

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Authors
Higaki, Y., Usami, N., Shintani, S., Ishikura, S., El-Kabbani, O., & Hara, A.
Affiliations
  • Gifu Pharmaceutical University (JP)
  • Monash University (AU)
Corresponding author
Hara, Akira
Venue
Chemico-Biological Interactions
Publisher
Elsevier BV
Published
2003-02
Volume
143-144
Pages
503-513
ISSN
0009-2797 (ISSN-L)
OpenAlex
W2029150083
Cited by
89
References
28
Citations by year
2026: 2 · 2025: 5 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 3 · 2017: 5 · 2016: 2 · 2015: 1 · 2014: 8 · 2013: 9 · 2012: 6
FWCI
1.22
Type
journal article
Language
en
Open access
closed
Locations
  • Chemico-Biological Interactions (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Aldose Reductase and Taurine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Steroid Chemistry and Biochemistry
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
20α-hydroxysteroid dehydrogenase, AKR1C1, AKR1C2, neurosteroids, progesterone metabolism, enzyme inhibitors, benzbromarone, enzyme kinetics, ordered bi-bi mechanism, brain steroid metabolism, HepG2 cells, ethacrynic acid
MeSH terms
Benzbromarone, Binding Sites, Enzyme Inhibitors, Humans, Phenolphthaleins, Progesterone, 20-Hydroxysteroid Dehydrogenases

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