2
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found

      11β-Hydroxysteroid Dehydrogenase Type 1 Deficiency (‘Apparent Cortisone Reductase Deficiency’) in a 6-Year-Old Boy

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Objective: We present the 1st case of prepubertal hyperandrogenism because of a defect in the conversion of cortisone (E) to cortisol (F) by hepatic11β-hydroxysteroid dehydrogenase type 1. Methods and Results: Clinical and anthropometric data were obtained. Serum androgens and gonadotropins with luteinizing hormone releasing hormone stimulation test, dexamethasone suppression test, and corticotropin-releasing hormone stimulation test were evaluated. Adrenal imaging and urinary steroid profiling by gas chromatography/mass spectrometry were employed. A 6.9-year-old boy presented with precocious pubarche, height (+2.6 SD), accelerated bone age (11.5 years), and Tanner stage 2 pubic hair and genitalia. Serum androgen levels were elevated and dexamethasone suppressible. Serum F was normal, but the E concentration was increased. Central precocious puberty and congenital adrenal hyperplasia were excluded. The excretion of androgen metabolites was moderately increased, but a highly increased tetrahydrocortisone (THE) and a diminished tetrahydrocortisol (THF + allo-THF) excretion was found with a [THF + allo-THF/ THE] ratio of 0.032 (normal controls 1.05 ± 0.17). The corticotropin-releasing hormone stimulation test showed an exaggerated adrenocorticotropic hormone response, suggesting a relative deficiency of F. Two months of hydrocortisone treatment (17.5 mg daily) failed to suppress androgens adequately. Treatment with dexamethasone (0.375 mg/daily) resulted in androgen suppression. Conclusions: In the case of precocious pubarche and accelerated growth, the diagnosis of 11β-hydroxysteroid dehydrogenase type 1 deficiency (‘apparent cortisone reductase deficiency’) should be considered. The diagnosis is based on determinations of urinary steroid metabolites.

          Related collections

          Most cited references 4

          • Record: found
          • Abstract: found
          • Article: not found

          11beta-hydroxysteroid dehydrogenase type 1 knockout mice show attenuated glucocorticoid-inducible responses and resist hyperglycemia on obesity or stress.

          Glucocorticoid hormones, acting via nuclear receptors, regulate many metabolic processes, including hepatic gluconeogenesis. It recently has been recognized that intracellular glucocorticoid concentrations are determined not only by plasma hormone levels, but also by intracellular 11beta-hydroxysteroid dehydrogenases (11beta-HSDs), which interconvert active corticosterone (cortisol in humans) and inert 11-dehydrocorticosterone (cortisone in humans). 11beta-HSD type 2, a dehydrogenase, thus excludes glucocorticoids from otherwise nonselective mineralocorticoid receptors in the kidney. Recent data suggest the type 1 isozyme (11beta-HSD-1) may function as an 11beta-reductase, regenerating active glucocorticoids from circulating inert 11-keto forms in specific tissues, notably the liver. To examine the importance of this enzyme isoform in vivo, mice were produced with targeted disruption of the 11beta-HSD-1 gene. These mice were unable to convert inert 11-dehydrocorticosterone to corticosterone in vivo. Despite compensatory adrenal hyperplasia and increased adrenal secretion of corticosterone, on starvation homozygous mutants had attenuated activation of the key hepatic gluconeogenic enzymes glucose-6-phosphatase and phosphoenolpyruvate carboxykinase, presumably, because of relative intrahepatic glucocorticoid deficiency. The 11beta-HSD-1 -/- mice were found to resist hyperglycamia provoked by obesity or stress. Attenuation of hepatic 11beta-HSD-1 may provide a novel approach to the regulation of gluconeogenesis.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            A new defect in the peripheral conversion of cortisone to cortisol.

            A steroid disorder is described in two sisters, aged 13 and 17 years, in which the metabolism of cortisol results almost exclusively in urinary excretion of tetrahydro-cortisone (11-keto) derivatives. The evidence implies the existence of a deficiency in the peripheral enzymatic conversion of cortisone to cortisol.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Apparent Cortisone Reductase Deficiency: A Functional Defect in 11 -Hydroxysteroid Dehydrogenase Type 1

               A. JAMIESON (1999)
                Bookmark

                Author and article information

                Journal
                HRE
                Horm Res Paediatr
                10.1159/issn.1663-2818
                Hormone Research in Paediatrics
                S. Karger AG
                1663-2818
                1663-2826
                2003
                2003
                28 March 2003
                : 59
                : 4
                : 205-210
                Affiliations
                Departments of aLaboratory Diagnostics and bEndocrinology, The Children’s Memorial Health Institute, Warsaw, and c2nd Department of Children’s Diseases, Medical University, Białystok, Poland
                Article
                69326 Horm Res 2003;59:205–210
                10.1159/000069326
                12649576
                © 2003 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                Page count
                Figures: 1, Tables: 4, References: 16, Pages: 6
                Categories
                Case Report

                Comments

                Comment on this article