Assessing non-Mendelian inheritance in inherited axonopathies.
Charcot–Marie–Tooth disease
hereditary spastic paraplegia
inherited axonopathy
mutational burden
oligogenic inheritance
Journal
Genetics in medicine : official journal of the American College of Medical Genetics
ISSN: 1530-0366
Titre abrégé: Genet Med
Pays: United States
ID NLM: 9815831
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
received:
10
02
2020
accepted:
22
07
2020
revised:
22
07
2020
pubmed:
4
8
2020
medline:
28
4
2021
entrez:
4
8
2020
Statut:
ppublish
Résumé
Inherited axonopathies (IA) are rare, clinically and genetically heterogeneous diseases that lead to length-dependent degeneration of the long axons in central (hereditary spastic paraplegia [HSP]) and peripheral (Charcot-Marie-Tooth type 2 [CMT2]) nervous systems. Mendelian high-penetrance alleles in over 100 different genes have been shown to cause IA; however, about 50% of IA cases do not receive a genetic diagnosis. A more comprehensive spectrum of causative genes and alleles is warranted, including causative and risk alleles, as well as oligogenic multilocus inheritance. Through international collaboration, IA exome studies are beginning to be sufficiently powered to perform a pilot rare variant burden analysis. After extensive quality control, our cohort contained 343 CMT cases, 515 HSP cases, and 935 non-neurological controls. We assessed the cumulative mutational burden across disease genes, explored the evidence for multilocus inheritance, and performed an exome-wide rare variant burden analysis. We replicated the previously described mutational burden in a much larger cohort of CMT cases, and observed the same effect in HSP cases. We identified a preliminary risk allele for CMT in the EXOC4 gene (p value= 6.9 × 10-6, odds ratio [OR] = 2.1) and explored the possibility of multilocus inheritance in IA. Our results support the continuing emergence of complex inheritance mechanisms in historically Mendelian disorders.
Identifiants
pubmed: 32741968
doi: 10.1038/s41436-020-0924-0
pii: S1098-3600(21)00817-0
pmc: PMC7710562
mid: NIHMS1619685
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2114-2119Subventions
Organisme : NINDS NIH HHS
ID : U54 NS065712
Pays : United States
Organisme : NINDS NIH HHS
ID : U54NS065712-12
Pays : United States
Organisme : NINDS NIH HHS
ID : R01 NS072248
Pays : United States
Organisme : NINDS NIH HHS
ID : R01 NS105755
Pays : United States
Organisme : CIHR
Pays : Canada
Investigateurs
Aixa Rodriguez
(A)
Alexa Bacha
(A)
Ashley Kosikowski
(A)
Beth Wood
(B)
Brett McCray
(B)
Brianna Blume
(B)
Carly Siskind
(C)
Charlotte Sumner
(C)
Daniela Calabrese
(D)
David Walk
(D)
Dragan Vujovic
(D)
Eun Park
(E)
Francesco Muntoni
(F)
Gabrielle Donlevy
(G)
Gyula Acsadi
(G)
John Day
(J)
Joshua Burns
(J)
Jun Li
(J)
Karen Krajewski
(K)
Kate Eichinger
(K)
Kayla Cornett
(K)
Krista Mullen
(K)
Laura Perez
(L)
Laurie Gutmann
(L)
Maria Barrett
(M)
Mario Saporta
(M)
Mariola Skorupinska
(M)
Natalie Grant
(N)
Paula Bray
(P)
Reza Seyedsadjadi
(R)
Riccardo Zuccarino
(R)
Richard Finkel
(R)
Richard Lewis
(R)
Sabrina Yum
(S)
Sarah Hilbert
(S)
Simone Thomas
(S)
Steffen Behrens-Spraggins
(S)
Tara Jones
(T)
Tiffany Grider
(T)
Tim Estilow
(T)
Vera Fridman
(V)
Mary M Reilly
(MM)
Michael E Shy
(ME)
Chelsea J Bacon
(CJ)
Shawna M E Feely
(SME)
Alexander M Rossor
(AM)
David N Herrmann
(DN)
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