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Three Reportedly Unrelated Families With Liddle Syndrome Inherited From a Common Ancestor.

Pagani, L; Diekmann, Y; Sazzini, M; De Fanti, S; Rondinelli, M; Farnetti, E; Casali, B; ... Rossi, E; + view all (2018) Three Reportedly Unrelated Families With Liddle Syndrome Inherited From a Common Ancestor. Hypertension , 71 (2) pp. 273-279. 10.1161/HYPERTENSIONAHA.117.10491. Green open access

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Abstract

Liddle syndrome is considered a rare Mendelian hypertension. We have previously described 3 reportedly unrelated families, native of an Italian area around the Strait of Messina, carrying the same mutation (βP617L) of the epithelial sodium channel. The aims of our study were (1) to evaluate whether a close genomic relationship exists between the 3 families through the analysis of mitochondrial DNA and Y chromosome; and (2) to quantify the genomic relatedness between the patients with Liddle syndrome belonging to the 3 families and assess the hypothesis of a mutation shared through identity by descent. HVRI (the hypervariable region I) of the mitochondrial DNA genome and the Y chromosome short tandem repeats profiles were analyzed in individuals of the 3 families. Genotyping 542 585 genome-wide single nucleotide polymorphisms was performed in all the patients with Liddle syndrome of the 3 families and some of their relatives. A panel of 780 healthy Italian adult samples typed for the same set of markers was used as controls. Despite different lineages between the 3 families based on the analysis of mitochondrial DNA and Y chromosome, the 3 probands and their 6 affected relatives share the same ≈5 Mbp long haplotype which encompasses the mutant allele. Using an approach based on coalescent theory, we estimate that the 3 families inherited the mutant allele from a common ancestor ≈13 generations ago and that such an ancestor may have left ≈20 carriers alive today. The prevalence of Liddle syndrome in the region of origin of the 3 families may be much higher than that estimated worldwide.

Type: Article
Title: Three Reportedly Unrelated Families With Liddle Syndrome Inherited From a Common Ancestor.
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1161/HYPERTENSIONAHA.117.10491
Publisher version: http://dx.doi.org/10.1161/HYPERTENSIONAHA.117.1049...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: DNA, mitochondrial, Liddle syndrome, aldosterone, epithelial sodium channel, renin
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10040194
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