Movement Disorders (revue)

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Screening for Lrrk2 G2019S and clinical comparison of tunisian and North American caucasian Parkinson's disease families

Identifieur interne : 001474 ( PascalFrancis/Checkpoint ); précédent : 001473; suivant : 001475

Screening for Lrrk2 G2019S and clinical comparison of tunisian and North American caucasian Parkinson's disease families

Auteurs : Lianna Ishihara [Royaume-Uni] ; Rachel A. Gibson [Royaume-Uni] ; Liling Warren [États-Unis] ; Rim Amouri [Tunisie] ; Kelly Lyons [États-Unis] ; Catherine Wielinski [États-Unis] ; Christine Hunter [États-Unis] ; Jina E. Swartz [Royaume-Uni] ; Ramu Elango [Royaume-Uni] ; P. Anthony Akkari [États-Unis] ; David Leppert [Royaume-Uni] ; Linda Surh [Royaume-Uni] ; Kevin H. Reeves [États-Unis] ; Siwan Thomas [Royaume-Uni] ; Leigh Ragone [États-Unis] ; Nobutaka Hattori [Japon] ; Rajesh Pahwa [États-Unis] ; Joseph Jankovic [États-Unis] ; Martha Nance [États-Unis] ; Alan Freeman [États-Unis] ; Neziha Gouider-Khouja [Tunisie] ; Mounir Kefi [Tunisie] ; Mourad Zouari [Tunisie] ; Samia Ben Sassi [Tunisie] ; Samia Ben Yahmed [Tunisie] ; Ghada El Euch-Fayeche [Tunisie] ; Lefkos Middleton [Royaume-Uni] ; David J. Burn [Royaume-Uni] ; Ray L. Watts [États-Unis] ; Faycal Hentati [Tunisie]

Source :

RBID : Pascal:07-0133217

Descripteurs français

English descriptors

Abstract

Mutations in the leucine-rich repeat kinase-2 gene (LRRK2) are responsible for some forms of familial as well as sporadic Parkinson's disease (PD). The purpose of this study was to examine the frequency of a single pathogenic mutation (6055G>A) in the kinase domain of this gene in United States and Tunisian familial PD and to compare clinical characteristics between patients with and without the mutation. Standardized case report forms were used for clinical and demographic data collection. We investigated the frequency of the most common substitution of LRRK2 (G2019S, 6055G>A) and its impact on epidemiological and phenotypic features. The frequency of mutations in Tunisian families was 42% (38/91) and in U.S. families 2.6% (1/39), with the unique opportunity to compare homozygous (n = 23) and heterozygous (n = 109) Tunisian carriers of G2019S substitutions. Individuals with G2019S substitutions had an older age at onset but few other differences compared with families negative for the substitution. Patients with LRRK2 mutations had typical clinical features of PD. Comparisons between individuals with heterozygous and homozygous LRRK2 mutations suggested that gene dosage was not correlated with phenotypic differences; however, the estimated penetrance was greater in homozygotes across all age groups.


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Pascal:07-0133217

Le document en format XML

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<region type="state">Minnesota</region>
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<name sortKey="Hunter, Christine" sort="Hunter, Christine" uniqKey="Hunter C" first="Christine" last="Hunter">Christine Hunter</name>
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<s1>Department of Neurology, Baylor College of Medicine</s1>
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<name sortKey="Elango, Ramu" sort="Elango, Ramu" uniqKey="Elango R" first="Ramu" last="Elango">Ramu Elango</name>
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<name sortKey="Surh, Linda" sort="Surh, Linda" uniqKey="Surh L" first="Linda" last="Surh">Linda Surh</name>
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<name sortKey="Reeves, Kevin H" sort="Reeves, Kevin H" uniqKey="Reeves K" first="Kevin H." last="Reeves">Kevin H. Reeves</name>
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<region type="state">Caroline du Nord</region>
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<name sortKey="Thomas, Siwan" sort="Thomas, Siwan" uniqKey="Thomas S" first="Siwan" last="Thomas">Siwan Thomas</name>
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<s1>Research and Development, GlaxoSmithKline Pharmaceuticals</s1>
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<name sortKey="Ragone, Leigh" sort="Ragone, Leigh" uniqKey="Ragone L" first="Leigh" last="Ragone">Leigh Ragone</name>
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<name sortKey="Hattori, Nobutaka" sort="Hattori, Nobutaka" uniqKey="Hattori N" first="Nobutaka" last="Hattori">Nobutaka Hattori</name>
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<s1>Department of Neurology, Juntendo University School of Medicine</s1>
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<country>Japon</country>
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<name sortKey="Pahwa, Rajesh" sort="Pahwa, Rajesh" uniqKey="Pahwa R" first="Rajesh" last="Pahwa">Rajesh Pahwa</name>
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<s1>Department of Neurology, University of Kansas Medical Center</s1>
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<region type="state">Kansas</region>
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<name sortKey="Jankovic, Joseph" sort="Jankovic, Joseph" uniqKey="Jankovic J" first="Joseph" last="Jankovic">Joseph Jankovic</name>
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<s1>Department of Neurology, Baylor College of Medicine</s1>
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<placeName>
<region type="state">Texas</region>
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<placeName>
<settlement type="city">Houston</settlement>
<region type="state">Texas</region>
</placeName>
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<author>
<name sortKey="Nance, Martha" sort="Nance, Martha" uniqKey="Nance M" first="Martha" last="Nance">Martha Nance</name>
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<inist:fA14 i1="06">
<s1>Struthers Parkinson's Center</s1>
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<placeName>
<region type="state">Minnesota</region>
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<author>
<name sortKey="Freeman, Alan" sort="Freeman, Alan" uniqKey="Freeman A" first="Alan" last="Freeman">Alan Freeman</name>
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<s1>Department of Neurology, Emory University</s1>
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<placeName>
<region type="state">Géorgie (États-Unis)</region>
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<author>
<name sortKey="Gouider Khouja, Neziha" sort="Gouider Khouja, Neziha" uniqKey="Gouider Khouja N" first="Neziha" last="Gouider-Khouja">Neziha Gouider-Khouja</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<name sortKey="Kefi, Mounir" sort="Kefi, Mounir" uniqKey="Kefi M" first="Mounir" last="Kefi">Mounir Kefi</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<author>
<name sortKey="Zouari, Mourad" sort="Zouari, Mourad" uniqKey="Zouari M" first="Mourad" last="Zouari">Mourad Zouari</name>
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<author>
<name sortKey="Ben Sassi, Samia" sort="Ben Sassi, Samia" uniqKey="Ben Sassi S" first="Samia" last="Ben Sassi">Samia Ben Sassi</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<author>
<name sortKey="Ben Yahmed, Samia" sort="Ben Yahmed, Samia" uniqKey="Ben Yahmed S" first="Samia" last="Ben Yahmed">Samia Ben Yahmed</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
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<author>
<name sortKey="El Euch Fayeche, Ghada" sort="El Euch Fayeche, Ghada" uniqKey="El Euch Fayeche G" first="Ghada" last="El Euch-Fayeche">Ghada El Euch-Fayeche</name>
<affiliation wicri:level="1">
<inist:fA14 i1="04">
<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
<wicri:noRegion>La Rabta, Tunis</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Middleton, Lefkos" sort="Middleton, Lefkos" uniqKey="Middleton L" first="Lefkos" last="Middleton">Lefkos Middleton</name>
<affiliation wicri:level="1">
<inist:fA14 i1="02">
<s1>Research and Development, GlaxoSmithKline Pharmaceuticals</s1>
<s2>Greenford</s2>
<s3>GBR</s3>
<sZ>2 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
<sZ>11 aut.</sZ>
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</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Greenford</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Burn, David J" sort="Burn, David J" uniqKey="Burn D" first="David J." last="Burn">David J. Burn</name>
<affiliation wicri:level="1">
<inist:fA14 i1="10">
<s1>Department of Neurology, Newcastle General Hospital</s1>
<s2>Newcastle-upon-Tyne</s2>
<s3>GBR</s3>
<sZ>28 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Newcastle-upon-Tyne</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Watts, Ray L" sort="Watts, Ray L" uniqKey="Watts R" first="Ray L." last="Watts">Ray L. Watts</name>
<affiliation wicri:level="2">
<inist:fA14 i1="11">
<s1>Department of Neurology, University of Alabama at Birmingham</s1>
<s2>Birmingham, Alabama</s2>
<s3>USA</s3>
<sZ>29 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName>
<region type="state">Alabama</region>
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<name sortKey="Gibson, Rachel A" sort="Gibson, Rachel A" uniqKey="Gibson R" first="Rachel A." last="Gibson">Rachel A. Gibson</name>
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<region type="state">Caroline du Nord</region>
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<region type="state">Caroline du Nord</region>
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<name sortKey="Hattori, Nobutaka" sort="Hattori, Nobutaka" uniqKey="Hattori N" first="Nobutaka" last="Hattori">Nobutaka Hattori</name>
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<country>Japon</country>
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<region type="state">Kansas</region>
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<region type="state">Texas</region>
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<settlement type="city">Houston</settlement>
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<s1>Struthers Parkinson's Center</s1>
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<region type="state">Minnesota</region>
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<inist:fA14 i1="09">
<s1>Department of Neurology, Emory University</s1>
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<country>États-Unis</country>
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<region type="state">Géorgie (États-Unis)</region>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
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</affiliation>
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<author>
<name sortKey="Kefi, Mounir" sort="Kefi, Mounir" uniqKey="Kefi M" first="Mounir" last="Kefi">Mounir Kefi</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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</affiliation>
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<author>
<name sortKey="Zouari, Mourad" sort="Zouari, Mourad" uniqKey="Zouari M" first="Mourad" last="Zouari">Mourad Zouari</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
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</affiliation>
</author>
<author>
<name sortKey="Ben Sassi, Samia" sort="Ben Sassi, Samia" uniqKey="Ben Sassi S" first="Samia" last="Ben Sassi">Samia Ben Sassi</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
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</affiliation>
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<author>
<name sortKey="Ben Yahmed, Samia" sort="Ben Yahmed, Samia" uniqKey="Ben Yahmed S" first="Samia" last="Ben Yahmed">Samia Ben Yahmed</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<country>Tunisie</country>
<wicri:noRegion>La Rabta, Tunis</wicri:noRegion>
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<author>
<name sortKey="El Euch Fayeche, Ghada" sort="El Euch Fayeche, Ghada" uniqKey="El Euch Fayeche G" first="Ghada" last="El Euch-Fayeche">Ghada El Euch-Fayeche</name>
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<s1>Service de Neurologie, Institut National de Neurologie</s1>
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<sZ>4 aut.</sZ>
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<country>Tunisie</country>
<wicri:noRegion>La Rabta, Tunis</wicri:noRegion>
</affiliation>
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<s1>Research and Development, GlaxoSmithKline Pharmaceuticals</s1>
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<sZ>2 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>12 aut.</sZ>
<sZ>14 aut.</sZ>
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</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Greenford</wicri:noRegion>
</affiliation>
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<author>
<name sortKey="Burn, David J" sort="Burn, David J" uniqKey="Burn D" first="David J." last="Burn">David J. Burn</name>
<affiliation wicri:level="1">
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<s1>Department of Neurology, Newcastle General Hospital</s1>
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<sZ>28 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Newcastle-upon-Tyne</wicri:noRegion>
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<inist:fA14 i1="11">
<s1>Department of Neurology, University of Alabama at Birmingham</s1>
<s2>Birmingham, Alabama</s2>
<s3>USA</s3>
<sZ>29 aut.</sZ>
</inist:fA14>
<country>États-Unis</country>
<placeName>
<region type="state">Alabama</region>
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<affiliation wicri:level="1">
<inist:fA14 i1="04">
<s1>Service de Neurologie, Institut National de Neurologie</s1>
<s2>La Rabta, Tunis</s2>
<s3>TUN</s3>
<sZ>4 aut.</sZ>
<sZ>21 aut.</sZ>
<sZ>22 aut.</sZ>
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<sZ>26 aut.</sZ>
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<country>Tunisie</country>
<wicri:noRegion>La Rabta, Tunis</wicri:noRegion>
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<title level="j" type="main">Movement disorders</title>
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<div type="abstract" xml:lang="en">Mutations in the leucine-rich repeat kinase-2 gene (LRRK2) are responsible for some forms of familial as well as sporadic Parkinson's disease (PD). The purpose of this study was to examine the frequency of a single pathogenic mutation (6055G>A) in the kinase domain of this gene in United States and Tunisian familial PD and to compare clinical characteristics between patients with and without the mutation. Standardized case report forms were used for clinical and demographic data collection. We investigated the frequency of the most common substitution of LRRK2 (G2019S, 6055G>A) and its impact on epidemiological and phenotypic features. The frequency of mutations in Tunisian families was 42% (38/91) and in U.S. families 2.6% (1/39), with the unique opportunity to compare homozygous (n = 23) and heterozygous (n = 109) Tunisian carriers of G2019S substitutions. Individuals with G2019S substitutions had an older age at onset but few other differences compared with families negative for the substitution. Patients with LRRK2 mutations had typical clinical features of PD. Comparisons between individuals with heterozygous and homozygous LRRK2 mutations suggested that gene dosage was not correlated with phenotypic differences; however, the estimated penetrance was greater in homozygotes across all age groups.</div>
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