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Timeline of Advances in Genetics of Primary Aldosteronism

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Genetics of Endocrine Diseases and Syndromes

Part of the book series: Experientia Supplementum ((EXS,volume 111))

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Abstract

The overwhelming majority of cases of primary aldosteronism (PA) occur sporadically due to a unilateral aldosterone-producing adenoma (APA) or bilateral idiopathic adrenal hyperplasia. Familial forms of PA are rare with four subtypes defined to date (familial hyperaldosteronism types I–IV). The molecular basis of familial hyperaldosteronism type I (FH type I or glucocorticoid-remediable aldosteronism) was established in 1992; two decades later the genetic variant causing FH type III was identified and germline mutations causing FH type IV and FH type II were determined soon after. Effective diagnostic protocols and methods to detect the overactive gland in unilateral PA by adrenal venous sampling followed by laparoscopic adrenalectomy have made available APAs for scientific studies. In rapid succession, following the widespread use of next-generation sequencing, recurrent somatic driver mutations in APAs were identified in genes encoding ion channels and transporters. The development of highly specific monoclonal antibodies against key enzymes in adrenal steroidogenesis has unveiled the heterogeneous features of the diseased adrenal in PA and helped reveal the high proportion of APAs with driver mutations. We discuss what is known about the genetics of PA that has led to a clearer understanding of the disease pathophysiology.

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Abbreviations

ACTH:

Adrenocorticotropic hormone

APA:

Aldosterone-producing adenoma

APCC:

Aldosterone-producing cell cluster

ARR:

Aldosterone-to-renin ratio

ATP:

Adenosine triphosphate

AVS:

Adrenal venous sampling

BAH:

Bilateral adrenal hyperplasia

Cav1.3:

Calcium voltage-gated channel subunit alpha 1D

Cav3.2:

Calcium voltage-gated channel subunit alpha 1H

ClC-2:

Chloride channel protein 2

ENS@T:

European Network for the Study of Adrenal Tumours

FH:

Familial hyperaldosteronism

GIRK1-4:

G protein-activated inwardly rectifying potassium channel 1-4

GRA:

Glucocorticoid-remediable aldosteronism

HAC15 cell:

Human adrenocortical cells

HEK cells:

Human embryonic kidney cells

MRA:

Mineralocorticoid receptor antagonists

NCI H295R cell line:

Human adrenocortical cell line

NGS:

Next-generation sequencing

PA:

Primary aldosteronism

pAATLs:

Potential APCC-to-APA-transitional lesions

PASNA:

Primary aldosteronism with seizures and neurologic abnormalities

PMCA:

Plasma membrane Ca2+-ATPase

SFRP2:

Secreted frizzled related protein 2

SSCP:

Single-strand conformation polymorphism

TASK1:

Potassium two-pore domain channel subfamily K member 3

TM:

Transmembrane

zF:

Zona fasciculata

zG:

Zona glomerulosa

zR:

Zona reticularis

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Acknowledgments

The work of M. Reincke is supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No [694913]). M Reincke and TA Williams are supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) Projektnummer: 314061271 – TRR 205. M. Reincke is additionally supported by DFG grant RE 752/20-1 and by the Else Kröner-Fresenius Stiftung in support of the German Conns Registry-Else-Kröner Hyperaldosteronism Registry (2013_A182 and 2015_A171).

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Correspondence to Tracy Ann Williams .

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Meyer, L.S., Reincke, M., Williams, T.A. (2019). Timeline of Advances in Genetics of Primary Aldosteronism. In: Igaz, P., Patócs, A. (eds) Genetics of Endocrine Diseases and Syndromes. Experientia Supplementum, vol 111. Springer, Cham. https://doi.org/10.1007/978-3-030-25905-1_11

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