ECE2013 Poster Presentations Endocrine tumours and neoplasia (66 abstracts)
Polymorphisms of the glucocorticoid receptor gene, as phenotype modifiers in patients with hormonally inactive adrenal adenomas
Bence Acs 1, , Agnes Szappanos 2 , Karolina Feldman-Kovacs 2 , Istvan Liko 3 , Judit Majnik 2 , Orsolya Acs 1 , Nikolette Szucs 2 , Miklos Toth 2 , Karoly Racz 2 & Attila Patocs 4,
1Semmelweis University School of Ph.D. Studies, Budapest, Hungary; 22nd Department of Internal Medicine, Semmelweis University, Budapest, Hungary; 3Gedeon Richter Ltd., Budapest, Hungary; 42nd Department of Internal Medicine and of Laboratory Medicine, Semmelweis University, Budapest, Hungary; 5Molecular Medicine Research Group, Hungarian Academy of Sciences, Budapest, Hungary.
Introduction: Altered sensitivity against glucocorticoids is partly influenced by polymorphisms (SNP) of the glucocorticoid receptor gene (GR). The aim of the present study was to extend our earlier study by inclusion and evaluation the role of the BclI and A3669G polymorphisms of the GR in patients with hormonally inactive adrenal adenomas.
Description of methods: This is a retrospective, single-centre genetic association study The study included 99 patients with hormonally inactive (HI) adrenal adenomas discovered incidentally (incidentalomas) and 129 healthy controls. Hormonal evaluation of the hypothalamo–pituitary–adrenal axis, measurement of metabolic parameters was carried out in patients, and genetic analysis in all subjects. The BclI polymorphism was detected by allele specific PCR while the A3669G by Taqman allele discrimination assay.
Results: The prevalence of the BclI was lower in unilateral while the prevalence of the A3669G was lower in patients with bilateral HI than in healthy controls, (BclI: 21.8 vs 34.5%; A3669G: 10.8 vs 22.1% P<0.05). Patients who carried the BclI polymorphism had higher: systolic blood pressure, BMI, serum cholesterol level and ACTH level measured after methopyron test. The prevalence of obesity was also higher in BclI carriers, and this prevalence further increased when the A3669G SNP was present. Although lower prevalence of hyperlipidemia and plasma ACTH level was detected in the same group.
Conclusion: Our results confirm that behind the development of adrenal tumors especial in bilateral cases the polymorphic allele of the N363S and the wild type alleles of the BclI and A3669G represent genetic risk factors. Different mechanisms related to GR genetic variants alone or together may contribute to the morbidities found in these patients
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Endocrine Abstracts
ISSN 1470-3947 (print) | ISSN 1479-6848 (online)
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