machado-joseph disease/dopaminas

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Decreased dopamine transporter binding in Machado-Joseph disease.

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The aim of this study was to use 99mTc-TRODAT-1 brain SPECT for investigation of the binding of dopamine transporter (DAT) in the nigrostriatal dopaminergic pathway of symptomatic Machado-Joseph disease (MJD) and to compare the results with the abnormal cytidylate, adenylate, and guanylate (CAG)

Cognitive and olfactory deficits in Machado-Joseph disease: a dopamine transporter study.

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Cognitive and olfactory impairments have been demonstrated in patients with Machado-Joseph disease (MJD), and a possible relationship with dopaminergic dysfunction is implicated. However, there is still controversy regarding the pattern of striatal dopaminergic dysfunction in patients with MJD. In

Sleep disorders in Machado-Joseph disease: a dopamine transporter imaging study.

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OBJECTIVE Sleep disorders, especially restless legs syndrome (RLS) and rapid eye movement sleep behavior disorder (RBD), are common in spinocerebellar ataxia type 3 or Machado-Joseph disease (MJD), and a possible underlying dopaminergic dysfunction is implicated. This study assessed the relationship

Dopamine transporter concentration is reduced in asymptomatic Machado-Joseph disease gene carriers.

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Dopamine transporter (DAT) binding is decreased in Machado-Joseph disease (MJD) patients. To further investigate the DAT activity in asymptomatic MJD (aMJD) gene carriers, we performed this prospective study using (99m)Tc-TRODAT-1

Substantia nigra echogenicity is correlated with nigrostriatal impairment in Machado-Joseph disease.

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BACKGROUND Several studies have demonstrated increased substantia nigra (SN) echogenicity in Parkinson's disease (PD) and Machado-Joseph disease (MJD). Pathological substrate of PD is characterized by dopaminergic nigrostriatal cell loss, also found in MJD. Also, SN hyperechogenicity might be

The parkinsonian phenotype of spinocerebellar ataxia type 3 in a Taiwanese family.

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We report a parkinsonian phenotype of spinocerebellar ataxia type 3 (SCA3) in three female sibs from one Taiwanese family, found in a genetic analysis of 60 patients from 49 families with familial parkinsonism. Initially, all three patients presented with early onset resting tremor, rigidity,

Presumed rapid eye movement behavior disorder in Machado-Joseph disease (spinocerebellar ataxia type 3).

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Rapid eye movement behavior disorder (RBD) is a recently recognized sleep disorder in which patients are occasionally not paralyzed during the dream portions of sleep. When not idiopathic, this state has been associated primarily with parkinsonian conditions but also with a small number of

Striatal dopamine function in a family with multiple SCA-3 phenotypes.

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We present single photon emission computed tomography (SPECT) studies using 123IFP-CIT (DAT scan) and 123I-IBZM imaging, performed on four members of a family with genetically proven spinocerebellar ataxia type 3 (SCA-3). DAT scan showed significant asymmetric decreased binding in the striatum in

Dopamine transporter positron emission tomography in spinocerebellar ataxias type 1, 2, 3, and 6.

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BACKGROUND The spinocerebellar ataxias (SCAs) are a genetically heterogeneous group of autosomal dominant ataxias: some mutations, including SCA1, SCA2, and SCA3, are multisystemic disorders characterized by a variety of noncerebellar symptoms while others, like SCA6, give rise to a pure cerebellar

Relative contribution of SCA2, SCA3 and SCA17 in Korean patients with parkinsonism and ataxia.

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We examined the relative significance of SCA2, SCA3 and SCA17 in Koreans patients with parkinsonism and ataxia. We recruited patients with either parkinsonism (n = 524; PD = 386 and MSA = 138) or ataxia (n = 44) as their main clinical feature for two years. These patients were screened for SCA2,

Analysis of SCA2 and SCA3/MJD repeats in Parkinson's disease in mainland China: genetic, clinical, and positron emission tomography findings.

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To investigate the prevalence and clinical feature(s) of Parkinson's disease (PD) patients with expanded (ATXN2 and MJD1) genes of spinocerebellar ataxia type 2 and 3 (SCA2 and SCA3/MJD) in a mainland Chinese population, CAG triplet repeat expansions of (SCA2 and SCA3/MJD) genes (ATXN2 and MJD1)

Dopaminergic response in Parkinsonian phenotype of Machado-Joseph disease.

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We report on a patient with genetically proven Machado-Joseph Disease (MJD) presenting with signs indistinguishable from Parkinson's disease (PD), including levodopa response and typical levodopa-induced motor fluctuations. Only after 10 years of prolonged benefit from levodopa and different

No parkinsonism in SCA2 and SCA3 despite severe neurodegeneration of the dopaminergic substantia nigra.

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See Klockgether (doi:10.1093/awv253) for a scientific commentary on this article.The spinocerebellar ataxias types 2 (SCA2) and 3 (SCA3) are autosomal dominantly inherited cerebellar ataxias which are caused by CAG trinucleotide repeat expansions in the coding regions of the disease-specific genes.

Common psychiatric diseases and human genetic variation.

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OBJECTIVE A better understanding of human genetic variation is important in assessing disease epidemiology and phenotypic variation, and may be critical in evaluating genetic aspects of common genetic diseases, such as schizophrenia, bipolar disease and Parkinson's. These diseases are particularly

Expanding the Spectrum of Dopa-Responsive Dystonia (DRD) and Proposal for New Definition: DRD, DRD-plus, and DRD Look-alike.

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Previously, we defined DRD as a syndrome of selective nigrostriatal dopamine deficiency caused by genetic defects in the dopamine synthetic pathway without nigral cell loss. DRD-plus also has the same etiologic background with DRD, but DRD-plus patients have more severe features that are not seen in

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