Cited by 77Hormonal Regulation and HypertensionSteroid Chemistry and BiochemistryAdrenal Hormones and Disorders

Inter-conversion of 7α- and 7β-hydroxy-dehydroepiandrosterone by the human 11β-hydroxysteroid dehydrogenase type 1

Muller, Caroline, Pompon, Denis, Urban, Philippe, Morfin, Robert·2006·The Journal of Steroid Biochemistry and Molecular Biology

Abstract

The dehydroepiandrosterone (DHEA) 7alpha-hydroxylation in humans takes place in the liver, skin, and brain. These organs are targets for the glucocorticoid hormones where 11beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD1) activates cortisone through its reduction into cortisol. The putative interference of 7alpha-hydroxy-DHEA with the 11beta-HSD1-catalyzed reduction of cortisone into cortisol has been confirmed in preliminary works with human liver tissue preparations of the enzyme demonstrating the transformation of 7alpha-hydroxy-DHEA into 7-oxo-DHEA and 7beta-hydroxy-DHEA. However, the large production of 7beta-hydroxy-DHEA could not be explained satisfactorily. Therefore our objective was to study the role in the metabolism of oxygenated DHEA by recombinant human 11beta-HSD1 expressed in yeast. The 7alpha- and 7beta-hydroxy-DHEA were each oxidized into 7-oxo-DHEA with quite dissimilar K(M) (70 and 9.5 microM, respectively) but at equivalent V(max). In contrast, the 11beta-HSD1-mediated reduction of 7-oxo-DHEA led to the production of both 7alpha- and 7beta-hydroxy-DHEA with equivalent K(M) (1.1 microM) but with a 7beta-hydroxy-DHEA production characterized by a significantly greater V(max). The 7alpha-hydroxy-DHEA produced by the cytochrome CYP7B1 in tissues may exert anti-glucocorticoid effects through interference with the 11beta-HSD1-mediated cortisone reduction.

Integrity signals

Registry

Crossref · 10.1016/j.jsbmb.2005.12.001

Cites

39 of 39 references verified0 citation errors · 0 not checkable

Statistics

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

Claims the paper makes

This paper’s full text isn’t openly available, 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
Muller, C., Pompon, D., Urban, P., & Morfin, R.
Affiliations
  • Conservatoire National des Arts et Métiers (FR)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
Morfin, Robert
Venue
The Journal of Steroid Biochemistry and Molecular Biology
Publisher
Elsevier BV
Published
2006-06
Volume
99
Issue
4-5
Pages
215-222
ISSN
0960-0760 (ISSN-L)
OpenAlex
W2076615745
Cited by
77
References
39
Citations by year
2023: 1 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 8 · 2014: 7 · 2013: 3 · 2012: 7
FWCI
4.53
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Steroid Biochemistry and Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal Regulation and Hypertension
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Steroid Chemistry and Biochemistry
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
dehydroepiandrosterone, 11β-hydroxysteroid dehydrogenase type 1, enzyme kinetics, CYP7B1, glucocorticoid metabolism
MeSH terms
Base Sequence, Chromatography, Thin Layer, Cortisone, Dehydroepiandrosterone, Genetic Vectors, Humans, Hydrocortisone, Kinetics, Substrate Specificity, DNA Primers, 11-beta-Hydroxysteroid Dehydrogenase Type 1

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