A Novel TTBK2 De Novo Mutation in a Danish Family with Early-Onset Spinocerebellar Ataxia

Suzanne Granhøj Lindquist; Lisbeth Birk Møller; Christine I. Dali; Lisbeth Marner; Erik Jan Kamsteeg; Jørgen Erik Nielsen; Lena Elisabeth Hjermind

doi:10.1007/s12311-016-0786-9

A Novel TTBK2 De Novo Mutation in a Danish Family with Early-Onset Spinocerebellar Ataxia

Suzanne Granhøj Lindquist^*, Lisbeth Birk Møller, Christine I. Dali, Lisbeth Marner, Erik Jan Kamsteeg, Jørgen Erik Nielsen, Lena Elisabeth Hjermind

^*Corresponding author af dette arbejde

Medical Genetics Program

7 Citationer (Scopus)

Abstract

Spinocerebellar ataxia type 11 (SCA11) is rare and has previously been described in four families worldwide. We report a Danish family with onset of symptoms in early childhood and affected family members in two generations. The proband, a Danish female born in 1968, and family members were examined. Exome sequencing was performed and a “movement disorders” gene panel consisting of approximately 200 genes was used for filtering, while Sanger sequencing was used for subsequent testing for the mutation in the family. Onset of symptoms in affected family members was in early childhood. A novel frameshift mutation (c.1205_1207delinsA) in the tau-tubulin kinase 2 encoding gene, TTBK2, was identified, which was compatible with a diagnosis of SCA11. The mutation was subsequently identified in her two affected sons but not in the unaffected parents or her unaffected brother. This report further delineates the phenotypic spectrum of the rare SCA11 disease. In contrast to previously reported cases, onset of symptoms was in early childhood and the mutation was de novo in the proband.

Originalsprog	Engelsk
Tidsskrift	Cerebellum
Vol/bind	16
Udgave nummer	1
Sider (fra-til)	268-271
Antal sider	4
ISSN	1473-4222
DOI	https://doi.org/10.1007/s12311-016-0786-9
Status	Udgivet - feb. 2017

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10.1007/s12311-016-0786-9

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title = "A Novel TTBK2 De Novo Mutation in a Danish Family with Early-Onset Spinocerebellar Ataxia",

abstract = "Spinocerebellar ataxia type 11 (SCA11) is rare and has previously been described in four families worldwide. We report a Danish family with onset of symptoms in early childhood and affected family members in two generations. The proband, a Danish female born in 1968, and family members were examined. Exome sequencing was performed and a “movement disorders” gene panel consisting of approximately 200 genes was used for filtering, while Sanger sequencing was used for subsequent testing for the mutation in the family. Onset of symptoms in affected family members was in early childhood. A novel frameshift mutation (c.1205_1207delinsA) in the tau-tubulin kinase 2 encoding gene, TTBK2, was identified, which was compatible with a diagnosis of SCA11. The mutation was subsequently identified in her two affected sons but not in the unaffected parents or her unaffected brother. This report further delineates the phenotypic spectrum of the rare SCA11 disease. In contrast to previously reported cases, onset of symptoms was in early childhood and the mutation was de novo in the proband.",

keywords = "Cerebellum, Genetics, Neurodegeneration, Spinocerebellar ataxia",

author = "Lindquist, {Suzanne Granh{\o}j} and M{\o}ller, {Lisbeth Birk} and Dali, {Christine I.} and Lisbeth Marner and Kamsteeg, {Erik Jan} and Nielsen, {J{\o}rgen Erik} and Hjermind, {Lena Elisabeth}",

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T1 - A Novel TTBK2 De Novo Mutation in a Danish Family with Early-Onset Spinocerebellar Ataxia

AU - Lindquist, Suzanne Granhøj

AU - Møller, Lisbeth Birk

AU - Dali, Christine I.

AU - Marner, Lisbeth

AU - Kamsteeg, Erik Jan

AU - Nielsen, Jørgen Erik

AU - Hjermind, Lena Elisabeth

PY - 2017/2

Y1 - 2017/2

N2 - Spinocerebellar ataxia type 11 (SCA11) is rare and has previously been described in four families worldwide. We report a Danish family with onset of symptoms in early childhood and affected family members in two generations. The proband, a Danish female born in 1968, and family members were examined. Exome sequencing was performed and a “movement disorders” gene panel consisting of approximately 200 genes was used for filtering, while Sanger sequencing was used for subsequent testing for the mutation in the family. Onset of symptoms in affected family members was in early childhood. A novel frameshift mutation (c.1205_1207delinsA) in the tau-tubulin kinase 2 encoding gene, TTBK2, was identified, which was compatible with a diagnosis of SCA11. The mutation was subsequently identified in her two affected sons but not in the unaffected parents or her unaffected brother. This report further delineates the phenotypic spectrum of the rare SCA11 disease. In contrast to previously reported cases, onset of symptoms was in early childhood and the mutation was de novo in the proband.

AB - Spinocerebellar ataxia type 11 (SCA11) is rare and has previously been described in four families worldwide. We report a Danish family with onset of symptoms in early childhood and affected family members in two generations. The proband, a Danish female born in 1968, and family members were examined. Exome sequencing was performed and a “movement disorders” gene panel consisting of approximately 200 genes was used for filtering, while Sanger sequencing was used for subsequent testing for the mutation in the family. Onset of symptoms in affected family members was in early childhood. A novel frameshift mutation (c.1205_1207delinsA) in the tau-tubulin kinase 2 encoding gene, TTBK2, was identified, which was compatible with a diagnosis of SCA11. The mutation was subsequently identified in her two affected sons but not in the unaffected parents or her unaffected brother. This report further delineates the phenotypic spectrum of the rare SCA11 disease. In contrast to previously reported cases, onset of symptoms was in early childhood and the mutation was de novo in the proband.

KW - Cerebellum

KW - Genetics

KW - Neurodegeneration

KW - Spinocerebellar ataxia

U2 - 10.1007/s12311-016-0786-9

DO - 10.1007/s12311-016-0786-9

M3 - Journal article

C2 - 27165044

AN - SCOPUS:84966657771

SN - 1473-4222

VL - 16

SP - 268

EP - 271

JO - Cerebellum

JF - Cerebellum

IS - 1

ER -

A Novel TTBK2 De Novo Mutation in a Danish Family with Early-Onset Spinocerebellar Ataxia

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