Common genetic etiology between "multiple sclerosis-like" single-gene disorders and familial multiple sclerosis.

Abstract:

:Several single-gene disorders with clinical and radiological characteristics similar to those observed in multiple sclerosis (MS) patients have been described. To evaluate whether this phenotypic overlap can be ascribed to a common genetic etiology, 28 genes known to present pathogenic mutations for 24 of these disorders were sequenced in 270 MS patients. All identified variants were genotyped in 2131 MS cases and 830 healthy controls, and those exclusively observed in patients were assessed for segregation within families. This analysis identified 9 rare variants in 6 genes segregating with disease in 13 families. Four different mutations were identified in CYP27A1, including a reported pathogenic mutation for cerebrotendinous xanthomatosis (p.R405W), which was observed in six patients from a multi-incident family, three diagnosed with MS, two with an undefined neurological disease and one seemingly healthy. A LYST p.V1678A and a PDHA1 p.K387Q mutation were both observed in five MS patients from three separate multi-incident families. In addition, CLCN2 p.V174G, GALC p.D162E and POLG p.R361G were each identified in two MS patients from one family. This study suggests a shared genetic etiology between MS and the characterized single-gene disorders, and highlights cholesterol metabolism and the synthesis of oxysterols as important biological mechanisms for familial MS.

journal_name

Hum Genet

journal_title

Human genetics

authors

Traboulsee AL,Sadovnick AD,Encarnacion M,Bernales CQ,Yee IM,Criscuoli MG,Vilariño-Güell C

doi

10.1007/s00439-017-1784-9

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

705-714

issue

6

eissn

0340-6717

issn

1432-1203

pii

10.1007/s00439-017-1784-9

journal_volume

136

pub_type

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