A multi-step genomic approach prioritized TBKBP1 gene as relevant for multiple sclerosis susceptibility

Author:

Sorosina Melissa,Barizzone Nadia,Clarelli Ferdinando,Anand Santosh,Lupoli Sara,Salvi Erika,Mangano Eleonora,Bordoni Roberta,Roostaei Tina,Mascia Elisabetta,Zuccalà Miriam,Vecchio Domizia,Cavalla Paola,Santoro Silvia,Ferrè Laura,Zollo Alen,Florio Lucia,Ragonese Paolo,Gajofatto Alberto,Scarpini Elio,Caputo Domenico,Gasperini Claudio,Granella Franco,Cavalla Paola,Bergamaschi Roberto,Ristori Giovanni,Solaro Claudio,Martinelli Boneschi Filippo,Passantino Francesco,Pugliatti Maura,Gallo Antonio,Brambilla Laura,Clerico Marinella,Capone Fioravante,Trojano Maria,Barlassina Cristina,Cusi Daniele,Martinelli Vittorio,Comi Giancarlo,Leone Maurizio,Filippi Massimo,Patsopoulos Nikolaos A.,De Jager Philip L.,De Bellis Gianluca,Esposito Federica,D’Alfonso Sandra,Martinelli Boneschi FilippoORCID,

Abstract

Abstract Background Over 200 genetic loci have been associated with multiple sclerosis (MS) explaining ~ 50% of its heritability, suggesting that additional mechanisms may account for the “missing heritability” phenomenon. Objective To analyze a large cohort of Italian individuals to identify markers associated with MS with potential functional impact in the disease. Methods We studied 2571 MS and 3234 healthy controls (HC) of continental Italian origin. Discovery phase included a genome wide association study (1727 MS, 2258 HC), with SNPs selected according to their association in the Italian cohort only or in a meta-analysis of signals with a cohort of European ancestry (4088 MS, 7144 HC). Top associated loci were then tested in two Italian cohorts through array-based genotyping (903 MS, 884 HC) and pool-based target sequencing (588 MS, 408 HC). Finally, functional prioritization through conditional eQTL and mQTL has been performed. Results Top associated signals overlap with already known MS loci on chromosomes 3 and 17. Three SNPs (rs4267364, rs8070463, rs67919208), all involved in the regulation of TBKBP1, were prioritized to be functionally relevant. Conclusions No evidence of novel signal of association with MS specific for the Italian continental population has been found; nevertheless, two MS loci seems to play a relevant role, raising the interest to further investigations for TBKBP1 gene.

Funder

Fondazione Italiana Sclerosi Multipla

Ministero della Salute

Università degli Studi del Piemonte Orientale

HYPERGENES

National Multiple Sclerosis Society

Publisher

Springer Science and Business Media LLC

Subject

Neurology (clinical),Neurology

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