Cardiac steroidogenesis in the normal and failing heart

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The present study explores the possibility of local de novo aldosterone production in normal and failing hearts (human and mouse) and the regulation of such putative cardiac steroidogenesis. Total RNA was isolated from human tissue from failing hearts taken at the time of cardiac transplantation, from normal hearts obtained at autopsy, and from normal and pressure-overloaded mouse hearts. Vascular smooth muscle cells from human artery and vein were also analyzed. RNA was reverse transcribed and probed with specific primers for side-chain cleavage enzyme (CYP11A), 3β-hydroxysteroid dehydrogenase, aldosterone synthase (CYP11B2), 11β-hydroxylase (CYP11B1), steroidogenic factor-1, and steroid acute regulatory protein. CYP11A, 3β-hydroxysteroid dehydrogenase-2, and steroid acute regulatory protein were expressed at modest levels in all tissues examined in both mouse and human. In failing human heart, CYP11B1 and CYP11B2 were detected in some samples, in contrast with normal hearts, which expressed neither; in the mouse heart steroidogenic factor-1 was detected, but neither CYP11B1 nor CYP11B2 was found. Steroidogenic factor-1 was detected in no human heart sample tested after 40 cycles of PCR. Although the expression of some steroidogenic genes can be detected in the heart, the likelihood of physiologically relevant levels of aldosterone production by the normal heart is very low. The exact cellular location of steroid synthesis in the failing human heart remains to be established.

Original languageEnglish
Pages (from-to)5121-5126
Number of pages6
JournalJournal of Clinical Endocrinology and Metabolism
Volume86
Issue number11
DOIs
Publication statusPublished - 2001
Externally publishedYes

Cite this

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title = "Cardiac steroidogenesis in the normal and failing heart",
abstract = "The present study explores the possibility of local de novo aldosterone production in normal and failing hearts (human and mouse) and the regulation of such putative cardiac steroidogenesis. Total RNA was isolated from human tissue from failing hearts taken at the time of cardiac transplantation, from normal hearts obtained at autopsy, and from normal and pressure-overloaded mouse hearts. Vascular smooth muscle cells from human artery and vein were also analyzed. RNA was reverse transcribed and probed with specific primers for side-chain cleavage enzyme (CYP11A), 3β-hydroxysteroid dehydrogenase, aldosterone synthase (CYP11B2), 11β-hydroxylase (CYP11B1), steroidogenic factor-1, and steroid acute regulatory protein. CYP11A, 3β-hydroxysteroid dehydrogenase-2, and steroid acute regulatory protein were expressed at modest levels in all tissues examined in both mouse and human. In failing human heart, CYP11B1 and CYP11B2 were detected in some samples, in contrast with normal hearts, which expressed neither; in the mouse heart steroidogenic factor-1 was detected, but neither CYP11B1 nor CYP11B2 was found. Steroidogenic factor-1 was detected in no human heart sample tested after 40 cycles of PCR. Although the expression of some steroidogenic genes can be detected in the heart, the likelihood of physiologically relevant levels of aldosterone production by the normal heart is very low. The exact cellular location of steroid synthesis in the failing human heart remains to be established.",
author = "Young, {Morag J.} and Clyne, {Colin D.} and Cole, {Timothy J.} and Funder, {John W.}",
year = "2001",
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language = "English",
volume = "86",
pages = "5121--5126",
journal = "Journal of Clinical Endocrinology and Metablism",
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}

Cardiac steroidogenesis in the normal and failing heart. / Young, Morag J.; Clyne, Colin D.; Cole, Timothy J.; Funder, John W.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 86, No. 11, 2001, p. 5121-5126.

Research output: Contribution to journalArticleResearchpeer-review

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