Diagnosis of glucocorticoid-remediable aldosteronism in hypertensive children
Objective: Glucocorticoid-remediable aldosteronism (GRA) is caused by the presence of a chimeric gene originating from an unequal cross-over between the CYP11B1 and CYP11B2 genes. Aldosterone suppression by dexamethasone and high 18-hydroxycortisol (18-OHF) levels have been used to differentiate GRA...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
May 27, 2011
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| In: |
Hormone research in paediatrics
Year: 2011, Volume: 76, Issue: 2, Pages: 93-98 |
| ISSN: | 1663-2826 |
| DOI: | 10.1159/000326524 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1159/000326524 Verlag, lizenzpflichtig, Volltext: https://www.karger.com/Article/FullText/326524 
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| Author Notes: | Clemens Kamrath, Christiane Maser-Gluth, Christine Haag, Egbert Schulze |
| Summary: | Objective: Glucocorticoid-remediable aldosteronism (GRA) is caused by the presence of a chimeric gene originating from an unequal cross-over between the CYP11B1 and CYP11B2 genes. Aldosterone suppression by dexamethasone and high 18-hydroxycortisol (18-OHF) levels have been used to differentiate GRA from the other forms of primary aldosteronism. Methods: A dexamethasone suppression test including serum 18-OHF determination and the measurement of urinary excretion of aldosterone, its metabolites and 18-OHF were performed in 3 children of a family with primary aldosteronism. Polymerase chain reactions were performed to identify the chimeric gene. Results: The chimeric gene was identified in 2 children, their mother and grandmother. The affected children had an aldosterone-to-plasma renin activity ratio >30, elevated serum 18-OHF concentration and increased urinary excretion of aldosterone, its metabolites, and 18-OHF. Post-dexamethasone concentrations of serum aldosterone and 18-OHF concentrations were suppressed. Conclusion: Although very rare, the possible diagnosis of GRA should be considered in all children or young adults with low-renin hypertension. Since genetic testing is more specific than biochemical testing, a definitive diagnosis can only be obtained by identification of the <i>CYP11B1/CYP11B2</i> chimeric gene. |
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| Item Description: | Gesehen am 07.07.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1663-2826 |
| DOI: | 10.1159/000326524 |