Mineralocorticoid Action: Target Tissue Specificity is Enzyme, not Receptor, Mediated

Mineralocorticoid receptors, both when in tissue extracts and when recombinantderived, have equal affinity for the physiological mineralocorticoid aldosterone and for the glucocorticoids cortisol and corticosterone, which circulate at much higher concentrations than aldosterone. Such receptors are f...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1988-10, Vol.242 (4878), p.583-585
Hauptverfasser: Funder, John W., Pearce, Paul T., Smith, Robin, Smith, A. Ian
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container_issue 4878
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container_title Science (American Association for the Advancement of Science)
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creator Funder, John W.
Pearce, Paul T.
Smith, Robin
Smith, A. Ian
description Mineralocorticoid receptors, both when in tissue extracts and when recombinantderived, have equal affinity for the physiological mineralocorticoid aldosterone and for the glucocorticoids cortisol and corticosterone, which circulate at much higher concentrations than aldosterone. Such receptors are found in physiological mineralocorticoid target tissues (kidney, parotid, and colon) and in nontarget tissues such as hippocampus and heart. In mineralocorticoid target tissues the receptors are selective for aldosterone in vivo because of the presence of the enzyme 11$\beta $-hydroxysteroid dehydrogenase, which converts cortisol and corticosterone, but not aldosterone, to their 11-keto analogs. These analogs cannot bind to mineralcorticoid receptors.
doi_str_mv 10.1126/science.2845584
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These analogs cannot bind to mineralcorticoid receptors.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.2845584</identifier><identifier>PMID: 2845584</identifier><identifier>CODEN: SCIEAS</identifier><language>eng</language><publisher>Washington, DC: The American Association for the Advancement of Science</publisher><subject>Adrenalectomy ; Aldosterone ; Aldosterone - physiology ; Aldosterone assay ; Animals ; Biochemistry ; Biological and medical sciences ; Body tissues ; Carbenoxolone - pharmacology ; Cell regulation ; Cellular control mechanisms ; Colon - physiology ; Corticosterone ; Corticosterone - metabolism ; Cytosol ; Dehydrogenases ; Enzymes ; Fundamental and applied biological sciences. Psychology ; Glucocorticoids ; Heart - physiology ; Hippocampus - physiology ; Hormone receptors ; Hydrocortisone ; Hydrocortisone - metabolism ; Hydroxysteroid Dehydrogenases - metabolism ; Kidney - physiology ; Kidneys ; Mineralocorticoids ; Parotid Gland - physiology ; Rats ; Receptors ; Receptors, Mineralocorticoid ; Receptors, Steroid - physiology ; Steroid hormones. 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Ian</creatorcontrib><title>Mineralocorticoid Action: Target Tissue Specificity is Enzyme, not Receptor, Mediated</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>Mineralocorticoid receptors, both when in tissue extracts and when recombinantderived, have equal affinity for the physiological mineralocorticoid aldosterone and for the glucocorticoids cortisol and corticosterone, which circulate at much higher concentrations than aldosterone. Such receptors are found in physiological mineralocorticoid target tissues (kidney, parotid, and colon) and in nontarget tissues such as hippocampus and heart. In mineralocorticoid target tissues the receptors are selective for aldosterone in vivo because of the presence of the enzyme 11$\beta $-hydroxysteroid dehydrogenase, which converts cortisol and corticosterone, but not aldosterone, to their 11-keto analogs. These analogs cannot bind to mineralcorticoid receptors.</description><subject>Adrenalectomy</subject><subject>Aldosterone</subject><subject>Aldosterone - physiology</subject><subject>Aldosterone assay</subject><subject>Animals</subject><subject>Biochemistry</subject><subject>Biological and medical sciences</subject><subject>Body tissues</subject><subject>Carbenoxolone - pharmacology</subject><subject>Cell regulation</subject><subject>Cellular control mechanisms</subject><subject>Colon - physiology</subject><subject>Corticosterone</subject><subject>Corticosterone - metabolism</subject><subject>Cytosol</subject><subject>Dehydrogenases</subject><subject>Enzymes</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Glucocorticoids</subject><subject>Heart - physiology</subject><subject>Hippocampus - physiology</subject><subject>Hormone receptors</subject><subject>Hydrocortisone</subject><subject>Hydrocortisone - metabolism</subject><subject>Hydroxysteroid Dehydrogenases - metabolism</subject><subject>Kidney - physiology</subject><subject>Kidneys</subject><subject>Mineralocorticoids</subject><subject>Parotid Gland - physiology</subject><subject>Rats</subject><subject>Receptors</subject><subject>Receptors, Mineralocorticoid</subject><subject>Receptors, Steroid - physiology</subject><subject>Steroid hormones. 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In mineralocorticoid target tissues the receptors are selective for aldosterone in vivo because of the presence of the enzyme 11$\beta $-hydroxysteroid dehydrogenase, which converts cortisol and corticosterone, but not aldosterone, to their 11-keto analogs. These analogs cannot bind to mineralcorticoid receptors.</abstract><cop>Washington, DC</cop><pub>The American Association for the Advancement of Science</pub><pmid>2845584</pmid><doi>10.1126/science.2845584</doi><tpages>3</tpages></addata></record>
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subjects Adrenalectomy
Aldosterone
Aldosterone - physiology
Aldosterone assay
Animals
Biochemistry
Biological and medical sciences
Body tissues
Carbenoxolone - pharmacology
Cell regulation
Cellular control mechanisms
Colon - physiology
Corticosterone
Corticosterone - metabolism
Cytosol
Dehydrogenases
Enzymes
Fundamental and applied biological sciences. Psychology
Glucocorticoids
Heart - physiology
Hippocampus - physiology
Hormone receptors
Hydrocortisone
Hydrocortisone - metabolism
Hydroxysteroid Dehydrogenases - metabolism
Kidney - physiology
Kidneys
Mineralocorticoids
Parotid Gland - physiology
Rats
Receptors
Receptors, Mineralocorticoid
Receptors, Steroid - physiology
Steroid hormones. Cholecalciferol derivatives
Steroids
Vertebrates: endocrinology
title Mineralocorticoid Action: Target Tissue Specificity is Enzyme, not Receptor, Mediated
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