Skip to main content
Advertisement

Main menu

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET

User menu

  • My alerts
  • Log in
  • My Cart

Search

  • Advanced search
Molecular Pharmacology
  • Other Publications
    • Drug Metabolism and Disposition
    • Journal of Pharmacology and Experimental Therapeutics
    • Molecular Pharmacology
    • Pharmacological Reviews
    • Pharmacology Research & Perspectives
    • ASPET
  • My alerts
  • Log in
  • My Cart
Molecular Pharmacology

Advanced Search

  • Home
  • Articles
    • Current Issue
    • Fast Forward
    • Latest Articles
    • Special Sections
    • Archive
  • Information
    • Instructions to Authors
    • Submit a Manuscript
    • FAQs
    • For Subscribers
    • Terms & Conditions of Use
    • Permissions
  • Editorial Board
  • Alerts
    • Alerts
    • RSS Feeds
  • Virtual Issues
  • Feedback
  • Submit
  • Visit molpharm on Facebook
  • Follow molpharm on Twitter
  • Follow molpharm on LinkedIn
Abstract

Novel steroid 5 alpha-reductase inhibitor FK143: its dual inhibition against the two isozymes and its effect on transcription of the isozyme genes.

H Kojo, O Nakayama, J Hirosumi, N Chida, Y Notsu and M Okuhara
Molecular Pharmacology September 1995, 48 (3) 401-406;
H Kojo
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
O Nakayama
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
J Hirosumi
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
N Chida
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Y Notsu
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
M Okuhara
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Info & Metrics
  • eLetters
  • PDF
Loading

Abstract

Recent cloning of the cDNAs for the two isozymes of steroid 5 alpha-reductase (EC 1.3.99.5) allowed individual expression of the isozymes and permitted us to investigate the action of steroid 5 alpha-reductase inhibitors against the individual isozymes without any ambiguity that may be caused by coexistence of the isozymes in tissue preparations. We examined the kinetic characteristics of FK143 (4-[3-[3-[bis(4-isobutylphenyl)methylamino]benzoyl]-1H-indol-1- yl]butyric acid), a novel nonsteroidal steroid 5 alpha-reductase inhibitor against cloned human and rat steroid 5 alpha-reductase isozymes. FK143 was shown to inhibit both isozymes equally. The mode of the inhibition of FK143 against both isozymes was noncompetitive. The inhibition constants Kie and Kies of FK143 for human types 1 and 2 were 27.0 and 19.6 nM and 19.9 and 14.5 nM, respectively. Species selectivity between human and rat of the inhibitory activity of FK143 against both isozymes was not found. We also examined the effect of FK143 on the in vivo expression of the genes encoding for the rat steroid 5 alpha-reductase isozymes. FK143 reduced the testosterone-induced increase in the amount of the type 1 mRNA in castrated rat, whereas it did not substantially affect the amount of the type 2 mRNA.

MolPharm articles become freely available 12 months after publication, and remain freely available for 5 years. 

Non-open access articles that fall outside this five year window are available only to institutional subscribers and current ASPET members, or through the article purchase feature at the bottom of the page. 

 

  • Click here for information on institutional subscriptions.
  • Click here for information on individual ASPET membership.

 

Log in using your username and password

Forgot your user name or password?

Purchase access

You may purchase access to this article. This will require you to create an account if you don't already have one.
PreviousNext
Back to top

In this issue

Molecular Pharmacology
Vol. 48, Issue 3
1 Sep 1995
  • Table of Contents
  • Table of Contents (PDF)
  • Index by author
  • Back Matter (PDF)
  • Editorial Board (PDF)
  • Front Matter (PDF)
Download PDF
Article Alerts
Sign In to Email Alerts with your Email Address
Email Article

Thank you for sharing this Molecular Pharmacology article.

NOTE: We request your email address only to inform the recipient that it was you who recommended this article, and that it is not junk mail. We do not retain these email addresses.

Enter multiple addresses on separate lines or separate them with commas.
Novel steroid 5 alpha-reductase inhibitor FK143: its dual inhibition against the two isozymes and its effect on transcription of the isozyme genes.
(Your Name) has forwarded a page to you from Molecular Pharmacology
(Your Name) thought you would be interested in this article in Molecular Pharmacology.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
Abstract

Novel steroid 5 alpha-reductase inhibitor FK143: its dual inhibition against the two isozymes and its effect on transcription of the isozyme genes.

H Kojo, O Nakayama, J Hirosumi, N Chida, Y Notsu and M Okuhara
Molecular Pharmacology September 1, 1995, 48 (3) 401-406;

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero

Share
Abstract

Novel steroid 5 alpha-reductase inhibitor FK143: its dual inhibition against the two isozymes and its effect on transcription of the isozyme genes.

H Kojo, O Nakayama, J Hirosumi, N Chida, Y Notsu and M Okuhara
Molecular Pharmacology September 1, 1995, 48 (3) 401-406;
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One

Jump to section

  • Article
  • Info & Metrics
  • eLetters
  • PDF

Related Articles

Cited By...

Similar Articles

Advertisement
  • Home
  • Alerts
Facebook   Twitter   LinkedIn   RSS

Navigate

  • Current Issue
  • Fast Forward by date
  • Fast Forward by section
  • Latest Articles
  • Archive
  • Search for Articles
  • Feedback
  • ASPET

More Information

  • About Molecular Pharmacology
  • Editorial Board
  • Instructions to Authors
  • Submit a Manuscript
  • Customized Alerts
  • RSS Feeds
  • Subscriptions
  • Permissions
  • Terms & Conditions of Use

ASPET's Other Journals

  • Drug Metabolism and Disposition
  • Journal of Pharmacology and Experimental Therapeutics
  • Pharmacological Reviews
  • Pharmacology Research & Perspectives
ISSN 1521-0111 (Online)

Copyright © 2022 by the American Society for Pharmacology and Experimental Therapeutics