Differential expression of the protein kinase A subunits in normal adrenal glands and adrenocortical adenomas

Please always quote using this URN: urn:nbn:de:bvb:20-opus-157952
  • Somatic mutations in protein kinase A catalytic α subunit (PRKACA) were found to be causative for 30-40% of cortisol-producing adenomas (CPA) of the adrenal gland, rendering PKA signalling constitutively active. In its resting state, PKA is a stable and inactive heterotetramer, consisting of two catalytic and two regulatory subunits with the latter inhibiting PKA activity. The human genome encodes three different PKA catalytic subunits and four different regulatory subunits that are preferentially expressed in different organs. In normalSomatic mutations in protein kinase A catalytic α subunit (PRKACA) were found to be causative for 30-40% of cortisol-producing adenomas (CPA) of the adrenal gland, rendering PKA signalling constitutively active. In its resting state, PKA is a stable and inactive heterotetramer, consisting of two catalytic and two regulatory subunits with the latter inhibiting PKA activity. The human genome encodes three different PKA catalytic subunits and four different regulatory subunits that are preferentially expressed in different organs. In normal adrenal glands all regulatory subunits are expressed, while CPA exhibit reduced protein levels of the regulatory subunit IIβ. In this study, we linked for the first time the loss of RIIβ protein levels to the PRKACA mutation status and found the down-regulation of RIIβ to arise post-transcriptionally. We further found the PKA subunit expression pattern of different tumours is also present in the zones of the normal adrenal cortex and demonstrate that the different PKA subunits have a differential expression pattern in each zone of the normal adrenal gland, indicating potential specific roles of these subunits in the regulation of different hormones secretion.show moreshow less

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Author: Isabel Weigand, Cristina L. Ronchi, Marthe Rizk-Rabin, Guido Di Dalmazi, Vanessa Wild, Kerstin Bathon, Beatrice Rubin, Davide Calebiro, Felix Beuschlein, Jérôme Bertherat, Martin Fassnacht, Silviu Sbiera
URN:urn:nbn:de:bvb:20-opus-157952
Document Type:Journal article
Faculties:Medizinische Fakultät / Pathologisches Institut
Medizinische Fakultät / Institut für Pharmakologie und Toxikologie
Medizinische Fakultät / Medizinische Klinik und Poliklinik I
Language:English
Parent Title (English):Scientific Reports
Year of Completion:2017
Volume:7
Issue:49
Source:Scientific Reports, 7:49 (2017). DOI: 10.1038/s41598-017-00125-8
DOI:https://doi.org/10.1038/s41598-017-00125-8
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 616 Krankheiten
Tag:immunohistochemistry; kinases
Release Date:2018/02/26
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2017
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International