Accuracy of Clinical Diagnosis in Parkinsonism — A Prospective Study

Rozdilsky, B.; Rajput, Alex

doi:10.1017/s0317167100031814

Cited by 514 publications

(338 citation statements)

References 30 publications

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“…In one study, 31 of 41 (75%) patients with clinically diagnosed PD (by two of the three cardinal signs rest tremor, rigidity and bradykinesia) had histopathological signs of PD at autopsy [10]. Among 100 cases with clinically diagnosed PD, 76 fulfilled pathological criteria for PD, whilst 24 were misdiagnosed [11].…”

Section: Diagnosis Of Pdmentioning

confidence: 99%

Epidemiology and etiology of Parkinson’s disease: a review of the evidence

et al. 2011

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Section: Diagnosis Of Pdmentioning

confidence: 99%

Epidemiology and etiology of Parkinson’s disease: a review of the evidence

et al. 2011

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“…The demographics for each series are presented in Supplementary Material, Table S5. All patients were examined and observed longitudinally by a movement disorders neurologist and diagnosed with PD according to published criteria (34). Dementia was evaluated using mini-mental state examination (MMSE).…”

Section: Participants and Proceduresmentioning

confidence: 99%

DNAJC13 mutations in Parkinson disease

Vilariño‐Güell

Rajput

Milnerwood

et al. 2013

Human Molecular Genetics

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A Saskatchewan multi-incident family was clinically characterized with Parkinson disease (PD) and Lewy body pathology. PD segregates as an autosomal-dominant trait, which could not be ascribed to any known mutation. DNA from three affected members was subjected to exome sequencing. Genome alignment, variant annotation and comparative analyses were used to identify shared coding mutations. Sanger sequencing was performed within the extended family and ethnically matched controls. Subsequent genotyping was performed in a multi-ethnic case–control series consisting of 2928 patients and 2676 control subjects from Canada, Norway, Taiwan, Tunisia, and the USA. A novel mutation in receptor-mediated endocytosis 8/RME-8 (DNAJC13 p.Asn855Ser) was found to segregate with disease. Screening of cases and controls identified four additional patients with the mutation, of which two had familial parkinsonism. All carriers shared an ancestral DNAJC13 p.Asn855Ser haplotype and claimed Dutch–German–Russian Mennonite heritage. DNAJC13 regulates the dynamics of clathrin coats on early endosomes. Cellular analysis shows that the mutation confers a toxic gain-of-function and impairs endosomal transport. DNAJC13 immunoreactivity was also noted within Lewy body inclusions. In late-onset disease which is most reminiscent of idiopathic PD subtle deficits in endosomal receptor-sorting/recycling are highlighted by the discovery of pathogenic mutations VPS35, LRRK2 and now DNAJC13. With this latest discovery, and from a neuronal perspective, a temporal and functional ecology is emerging that connects synaptic exo- and endocytosis, vesicular trafficking, endosomal recycling and the endo-lysosomal degradative pathway. Molecular deficits in these processes are genetically linked to the phenotypic spectrum of parkinsonism associated with Lewy body pathology.

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“…Idiopathic Parkinson's disease is characterized by the death of dopaminergic neurons; however, rare Parkinsonian syndromes have been identified in which the defect is associated with cell death in the dopamine-responsive neurons in the striatum (3)(4)(5)(6). Huntington's disease (HD) (7)(8)(9)(10), a neurodegenerative condition with motor, cognitive, and psychiatric disturbances, also involves death of dopamine receptor-expressing striatal projection neurons.…”

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Ablation of D1 dopamine receptor-expressing cells generates mice with seizures, dystonia, hyperactivity, and impaired oral behavior

Gantois

Fang

Jiang

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

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Huntington's disease is characterized by death of striatal projection neurons. We used a Cre/Lox transgenic approach to generate an animal model in which D1 dopamine receptor (Drd1a)؉ cells are progressively ablated in the postnatal brain. Striatal Drd1a, substance P, and dynorphin expression is progressively lost, whereas D2 dopamine receptor (Drd2) and enkephalin expression is up-regulated. Magnetic resonance spectroscopic analysis demonstrated early elevation of the striatal choline/creatine ratio, a finding associated with extensive reactive striatal astrogliosis. Sequential MRI demonstrated a progressive reduction in striatal volume and secondary ventricular enlargement confirmed to be due to loss of striatal cells. Mutant mice had normal gait and rotarod performance but displayed hindlimb dystonia, locomotor hyperactivity, and handling-induced electrographically verified spontaneous seizures. Ethological assessment identified an increase in rearing and impairments in the oral behaviors of sifting and chewing. In line with the limbic seizure profile, cell loss, astrogliosis, microgliosis, and down-regulated dynorphin expression were seen in the hippocampal dentate gyrus. This study specifically implicates Drd1a؉ cell loss with tail suspension hindlimb dystonia, hyperactivity, and abnormal oral function. The latter may relate to the speech and swallowing disturbances and the classic sign of tongueprotrusion motor impersistence observed in Huntington's disease. In addition, the findings of this study support the notion that Drd1a and Drd2 are segregated on striatal projection neurons. striatum ͉ Cre ͉ Huntington's disease T he nigrostriatal pathway projects from the midbrain substantia nigra pars compacta to innervate the dorsal striatum. Dopamine is released from dopaminergic terminals in the striatum to regulate motor activity and eating behavior (1). Early studies suggested that dopamine D1 (Drd1a) and D2 receptors (Drd2) are segregated on striatal projection neurons; the Drd1a is expressed on substance P and dynorphin-positive striatal neurons, which project directly to the substantia nigra pars reticulata/entopeduncular complex (known as the direct pathway), whereas Drd2 is preferentially expressed on enkephalin-positive striatopallidal projecting neurons (2). Neurons within the globus pallidus then project to the subthalamic nucleus, which in turn relays to the substantia nigra pars reticulata/entopeduncular complex (known as the indirect pathway). Dopamine also modulates the activity of glutamatergic corticostriatal input on striatal projection neurons.Idiopathic Parkinson's disease is characterized by the death of dopaminergic neurons; however, rare Parkinsonian syndromes have been identified in which the defect is associated with cell death in the dopamine-responsive neurons in the striatum (3-6). Huntington's disease (HD) (7-10), a neurodegenerative condition with motor, cognitive, and psychiatric disturbances, also involves death of dopamine receptor-expressing striatal projection neurons. Several ...

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Accuracy of Clinical Diagnosis in Parkinsonism — A Prospective Study

Cited by 514 publications

References 30 publications

Epidemiology and etiology of Parkinson’s disease: a review of the evidence

Epidemiology and etiology of Parkinson’s disease: a review of the evidence

DNAJC13 mutations in Parkinson disease

Ablation of D1 dopamine receptor-expressing cells generates mice with seizures, dystonia, hyperactivity, and impaired oral behavior

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