The G2019S LRRK2 mutation in Brazilian patients with Parkinson's disease: Phenotype in monozygotic twins
Identifieur interne : 000C56 ( Main/Exploration ); précédent : 000C55; suivant : 000C57The G2019S LRRK2 mutation in Brazilian patients with Parkinson's disease: Phenotype in monozygotic twins
Auteurs : Renato P. Munhoz [Brésil] ; Yosuke Wakutani [Canada] ; Connie Marras [Canada] ; Helio A. Teive [Brésil] ; Salmo Raskin [Brésil] ; Lineu C. Werneck [Brésil] ; Danielle Moreno [Canada] ; Christine Sato [Canada] ; Anthony E. Lang [Canada] ; Ekaterina Rogaeva [Canada]Source :
- Movement Disorders [ 0885-3185 ] ; 2008-01-30.
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- geographic : Brésil.
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Abstract
Mutations in the Leucine‐Rich Repeat Kinase 2 gene (LRRK2) are mainly responsible for idiopathic Parkinson's disease (PD) with either a dominant pattern of transmission or a sporadic occurrence due to the reduced penetrance. A majority of LRRK2 kindreds demonstrate an extremely variable age‐at‐onset in affected members of the same family. The G2019S is the most common LRRK2 mutation, which accounts for 1–5% PD patients in North America, and up to 40% of patients from an isolated Arab population. We assessed the frequency of the G2019S mutation in 83 Brazilian PD patients originally preselected for having an early age‐at‐onset (<50 years) and/or a positive family history. The mutation was detected in three probands (3.5%). Our clinical findings in these kindreds include the first description of the phenotype in identical twins discordant for handedness (a general phenomenon found in ∼25% monozygotic twins). However, both twins developed right asymmetric PD. The clinical presentation of twins was strikingly similar including an identical PD onset at age 60. This observation may suggest that genetic factors predominantly determine age‐at‐onset. © 2007 Movement Disorder Society
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DOI: 10.1002/mds.21832
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A majority of LRRK2 kindreds demonstrate an extremely variable age‐at‐onset in affected members of the same family. The G2019S is the most common LRRK2 mutation, which accounts for 1–5% PD patients in North America, and up to 40% of patients from an isolated Arab population. We assessed the frequency of the G2019S mutation in 83 Brazilian PD patients originally preselected for having an early age‐at‐onset (<50 years) and/or a positive family history. The mutation was detected in three probands (3.5%). Our clinical findings in these kindreds include the first description of the phenotype in identical twins discordant for handedness (a general phenomenon found in ∼25% monozygotic twins). However, both twins developed right asymmetric PD. The clinical presentation of twins was strikingly similar including an identical PD onset at age 60. This observation may suggest that genetic factors predominantly determine age‐at‐onset. © 2007 Movement Disorder Society</div></front></TEI><affiliations><list><country><li>Brésil</li><li>Canada</li></country><region><li>Ontario</li><li>Paraná (État)</li></region><settlement><li>Toronto</li></settlement><orgName><li>Université de Toronto</li></orgName></list><tree><country name="Brésil"><region name="Paraná (État)"><name sortKey="Munhoz, Renato P" sort="Munhoz, Renato P" uniqKey="Munhoz R" first="Renato P." last="Munhoz">Renato P. Munhoz</name></region><name sortKey="Raskin, Salmo" sort="Raskin, Salmo" uniqKey="Raskin S" first="Salmo" last="Raskin">Salmo Raskin</name><name sortKey="Teive, Helio A" sort="Teive, Helio A" uniqKey="Teive H" first="Helio A." last="Teive">Helio A. Teive</name><name sortKey="Werneck, Lineu C" sort="Werneck, Lineu C" uniqKey="Werneck L" first="Lineu C." last="Werneck">Lineu C. Werneck</name></country><country name="Canada"><region name="Ontario"><name sortKey="Wakutani, Yosuke" sort="Wakutani, Yosuke" uniqKey="Wakutani Y" first="Yosuke" last="Wakutani">Yosuke Wakutani</name></region><name sortKey="Lang, Anthony E" sort="Lang, Anthony E" uniqKey="Lang A" first="Anthony E." last="Lang">Anthony E. Lang</name><name sortKey="Lang, Anthony E" sort="Lang, Anthony E" uniqKey="Lang A" first="Anthony E." last="Lang">Anthony E. Lang</name><name sortKey="Marras, Connie" sort="Marras, Connie" uniqKey="Marras C" first="Connie" last="Marras">Connie Marras</name><name sortKey="Moreno, Danielle" sort="Moreno, Danielle" uniqKey="Moreno D" first="Danielle" last="Moreno">Danielle Moreno</name><name sortKey="Rogaeva, Ekaterina" sort="Rogaeva, Ekaterina" uniqKey="Rogaeva E" first="Ekaterina" last="Rogaeva">Ekaterina Rogaeva</name><name sortKey="Rogaeva, Ekaterina" sort="Rogaeva, Ekaterina" uniqKey="Rogaeva E" first="Ekaterina" last="Rogaeva">Ekaterina Rogaeva</name><name sortKey="Sato, Christine" sort="Sato, Christine" uniqKey="Sato C" first="Christine" last="Sato">Christine Sato</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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