Cited by 267Prostate Cancer Treatment and ResearchCancer, Lipids, and MetabolismSperm and Testicular Function

Novel 5α‐steroid reductase (SRD5A3, type‐3) is overexpressed in hormone‐refractory prostate cancer

Open access
Uemura, Motohide, Tamura, Kenji, Chung, Suyoun, Honma, Seijiro, Okuyama, Akihiko, Nakamura, Yusuke, Nakagawa, Hidewaki·2008·Cancer Science

Abstract

Prostate cancer often relapses during androgen-depletion therapy, even under conditions in which a drastic reduction of circulating androgens is observed. There is some evidence that androgens remain present in the tissues of hormone-refractory prostate cancers (HRPC), and enzymes involved in the androgen and steroid metabolic pathway are likely to be active in HRPC cells. We previously carried out a genome-wide gene expression profile analysis of clinical HRPC cells by means of cDNA microarrays in combination with microdissection of cancer cells and found dozens of transactivated genes. Among them, we here report the identification of a novel gene, SRD5A2L, encoding a putative 5 alpha-steroid reductase that produces the most potent androgen, 5 alpha-dihydrotestosterone (DHT), from testosterone. Liquid chromatography-tandem mass spectrometry analysis following an in vitro 5 alpha-steroid reductase reaction validated its ability to produce DHT from testosterone, similar to type 1 5 alpha-steroid reductase. Because two types of 5 alpha-steroid reductase were previously reported, we termed this novel 5 alpha-steroid reductase 'type 3 5 alpha-steroid reductase' (SRD5A3). Reverse transcription-polymerase chain reaction and northern blot analyses confirmed its overexpression in HRPC cells, and indicated no or little expression in normal adult organs. Knockdown of SRD5A3 expression by small interfering RNA in prostate cancer cells resulted in a significant decrease in DHT production and a drastic reduction in cell viability. These findings indicate that a novel type 3 5 alpha-steroid reductase, SRD5A3, is associated with DHT production and maintenance of androgen-androgen receptor-pathway activation in HRPC cells, and that this enzymatic activity should be a promising molecular target for prostate cancer therapy.

Integrity signals

Registry

Crossref · 10.1111/j.1349-7006.2007.00656.x

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Uemura, M., Tamura, K., Chung, S., Honma, S., Okuyama, A., Nakamura, Y., & Nakagawa, H.
Affiliations
Institute of Medical Science, The University of Tokyo (JP)
Corresponding author
Nakagawa, Hidewaki
Venue
Cancer Science
Publisher
Wiley
Published
2007-11-06
Volume
99
Issue
1
Pages
81-86
ISSN
  • 1347-9032 (ISSN-L)
  • 1349-7006
OpenAlex
W2029877275
Cited by
263
References
29
Citations by year
2026: 5 · 2025: 12 · 2024: 13 · 2023: 11 · 2022: 12 · 2021: 8 · 2020: 9 · 2019: 13 · 2018: 15 · 2017: 14 · 2016: 16 · 2015: 12 · 2014: 18 · 2013: 21 · 2012: 21
FWCI
11.52
Type
journal article
Language
en
Open access
Locations
  • Cancer Science (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
Keywords
SRD5A3, castration-resistant prostate cancer, dihydrotestosterone, androgen production, androgen receptor signaling, gene overexpression, siRNA knockdown
MeSH terms
Animals, Chlorocebus aethiops, Humans, Male, Neoplasms, Hormone-Dependent, Prostatic Neoplasms, Dihydrotestosterone, Testosterone, 3-Oxo-5-alpha-Steroid 4-Dehydrogenase, Transfection, COS Cells, RNA, Small Interfering, Cell Line, Tumor, Cell Growth Processes

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review