Evidence map›Paper›PMID 17950253›Full record

ArticleBiochemical pharmacology2008

An indomethacin analogue, N-(4-chlorobenzoyl)-melatonin, is a selective inhibitor of aldo-keto reductase 1C3 (type 2 3alpha-HSD, type 5 17beta-HSD, and prostaglandin F synthase), a potential target for the treatment of hormone dependent and hormone independent malignancies.

Michael C Byrns, Stephan Steckelbroeck, Trevor M Penning

Open access · greenAbstract read
In one paragraph

Article in Biochemical pharmacology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed
4.4field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

74 citing papers in PubMed, 137 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. The structural basis of aldo-keto reductase 1C3 inhibition by 17α-picolyl and 17(Journal of enzyme inhibition and medicinal chemistry · 2025
    Article
  5. Bioactivity profiling ofJournal of enzyme inhibition and medicinal chemistry · 2025
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14 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Michael C ByrnsCenter for Excellence in Environmental Toxicology, Department of Pharmacology, University of Pennsylvania School of Medicine, 3620 Hamilton Walk, Philadelphia, PA 19104-6084, United States.
Stephan Steckelbroeck
Trevor M Penning
University of Pennsylvania · US

Funding

Translational Research Support CoreP30ES013508 · NIEHS · UNIVERSITY OF PENNSYLVANIA · PI Rebecca A Simmons · 2006 to 2026
$35.3M
Diabetes, Endocrine, and MetabolismT32DK007314 · NIDDK · UNIVERSITY OF PENNSYLVANIA · PI DORIS A STOFFERS, Patrick Seale · 1986 to 2026
$9.0M
Human Aldo Keto Reductases and Steroid Hormone ActionR01CA090744 · NCI · UNIVERSITY OF PENNSYLVANIA · PI PENNING, TREVOR M · 2001 to 2011
$3.1M
NCI NIH HHS R01 CA090744NCI NIH HHS R01 CA90744NIDDK NIH HHS T32 DK007314NIEHS NIH HHS P30 ES013508
6 · The paper itself

Abstract

Aldo-keto reductase (AKR) 1C3 (type 2 3alpha-HSD, type 5 17beta-HSD, and prostaglandin F synthase) regulates ligand access to steroid hormone and prostaglandin receptors and may stimulate proliferation of prostate and breast cancer cells. NSAIDs are known inhibitors of AKR1C enzymes. An NSAID analogue that inhibits AKR1C3 but is inactive against the cyclooxygenases and the other AKR1C family members would provide an important tool to examine the role of AKR1C3 in proliferative signaling. We tested NSAIDs and NSAID analogues for inhibition of the reduction of 9,10-phenanthrenequinone (PQ) catalyzed by AKR1C3 and the closely related isoforms AKR1C1 and AKR1C2. Two of the compounds initially screened, indomethacin and its methyl ester, were specific for AKR1C3 versus the other AKR1C isoforms. Based on these results and the crystal structure of AKR1C3, we predicted that N-(4-chlorobenzoyl)-melatonin (CBM), an indomethacin analogue that does not inhibit the cyclooxygenases, would selectively inhibit AKR1C3. CBM inhibited the reduction of PQ by AKR1C3, but did not significantly inhibit AKR1C1 or AKR1C2. Indomethacin and CBM also inhibited the AKR1C3-catalyzed reduction of Delta(4)-androstene-3,17-dione but did not significantly inhibit the reduction of steroid hormones catalyzed by AKR1C1 or AKR1C2. The pattern of inhibition of AKR1C3 by indomethacin and CBM was uncompetitive versus PQ, but competitive versus Delta(4)-androstene-3,17-dione, indicating that two different inhibitory complexes form during the ordered bi bi reactions. The identification of CBM as a specific inhibitor of AKR1C3 will aid the investigation of its roles in steroid hormone and prostaglandin signaling and the resultant effects on cancer development.

Indexed as

3-Hydroxysteroid DehydrogenasesAldo-Keto Reductase Family 1 Member C3Anti-Inflammatory Agents, Non-SteroidalAntineoplastic AgentsCatalysisDihydrotestosteroneEnzyme InhibitorsHumansHydroxyprostaglandin DehydrogenasesIndolesIndomethacinMelatoninNeoplasms, Hormone-DependentOxidation-ReductionPhenanthrenes3-Hydroxysteroid Dehydrogenases9,10-phenanthrenequinoneAKR1C3 protein, humanAldo-Keto Reductase Family 1 Member C3Anti-Inflammatory Agents, Non-SteroidalAntineoplastic AgentsDihydrotestosteroneEnzyme InhibitorsHydroxyprostaglandin DehydrogenasesIndolesIndomethacinMelatoninN-(4-chlorobenzoyl)melatoninPhenanthrenes

Identifiers

PMID17950253
PMCPMC2245880
OpenAlexW2011974240

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.