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Journal ArticleDOI

Dopaminergic Loss and Inclusion Body Formation in α-Synuclein Mice: Implications for Neurodegenerative Disorders

TLDR
Results suggest that accumulation of wild-type alpha-synuclein may play a causal role in Parkinson's disease and related conditions.
Abstract
To elucidate the role of the synaptic protein alpha-synuclein in neurodegenerative disorders, transgenic mice expressing wild-type human alpha-synuclein were generated. Neuronal expression of human alpha-synuclein resulted in progressive accumulation of alpha-synuclein-and ubiquitin-immunoreactive inclusions in neurons in the neocortex, hippocampus, and substantia nigra. Ultrastructural analysis revealed both electron-dense intranuclear deposits and cytoplasmic inclusions. These alterations were associated with loss of dopaminergic terminals in the basal ganglia and with motor impairments. These results suggest that accumulation of wild-type alpha-synuclein may play a causal role in Parkinson's disease and related conditions.

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Protein Misfolding, Functional Amyloid, and Human Disease

TL;DR: The relative importance of the common main-chain and side-chain interactions in determining the propensities of proteins to aggregate is discussed and some of the evidence that the oligomeric fibril precursors are the primary origins of pathological behavior is described.
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Parkinson's disease: Mechanisms and models

TL;DR: PD models based on the manipulation of PD genes should prove valuable in elucidating important aspects of the disease, such as selective vulnerability of substantia nigra dopaminergic neurons to the degenerative process.
Journal ArticleDOI

Chronic systemic pesticide exposure reproduces features of Parkinson's disease

TL;DR: It is reported that chronic, systemic inhibition of complex I by the lipophilic pesticide, rotenone, causes highly selective nigrostriatal dopaminergic degeneration that is associated behaviorally with hypokinesia and rigidity.
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The new mutation, E46K, of alpha-synuclein causes Parkinson and Lewy body dementia.

TL;DR: Dementia with Lewy bodies is related to mutation of α‐synuclein, and the novel mutation, that substitutes a dicarboxylic amino acid, glutamic acid, with a basic amino acid in a much conserved area of the protein, is likely to produce severe disturbance of protein function.
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Interleukin-1 polymorphisms associated with increased risk of gastric cancer

TL;DR: It is reported that interleukin-1 gene cluster polymorphisms suspected of enhancing production of interleucine-1-beta are associated with an increased risk of both hypochlorhydria induced by H. pylori and gastric cancer.
References
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Journal ArticleDOI

Mutation in the α-synuclein gene identified in families with Parkinson's disease

TL;DR: A mutation was identified in the α-synuclein gene, which codes for a presynaptic protein thought to be involved in neuronal plasticity, in the Italian kindred and in three unrelated families of Greek origin with autosomal dominant inheritance for the PD phenotype.
Journal ArticleDOI

Alpha-synuclein in Lewy bodies.

TL;DR: Strong staining of Lewy bodies from idiopathic Parkinson's disease with antibodies for α-synuclein, a presynaptic protein of unknown function which is mutated in some familial cases of the disease, indicates that the LewY bodies from these two diseases may have identical compositions.
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Formation of neuronal intranuclear inclusions underlies the neurological dysfunction in mice transgenic for the hd mutation

TL;DR: In this paper, the authors observed that mice transgenic for exon 1 of the human HD gene carrying (CAG)115 to 157 repeat expansions develop pronounced neuronal intranuclear inclusions, containing the proteins huntingtin and ubiquitin, prior to developing a neurological phenotype.
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