synucleinopathies/tyrosine

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Tyrosine Kinase Inhibition Regulates Early Systemic Immune Changes and Modulates the Neuroimmune Response in α-Synucleinopathy.

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OBJECTIVE Neuro-inflammation is common in α-Synucleinopathies and Tauopathies; and evidence suggests a link between the tyrosine kinase Abl and neurodegeneration. Abl upregulates α-Synuclein and promotes Tau hyper-phosphorylation (p-Tau), while Abl inhibitors facilitate autophagic

Mice expressing the alpha(1B)-adrenergic receptor induces a synucleinopathy with excessive tyrosine nitration but decreased phosphorylation.

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We had previously reported that systemic overexpression of the alpha(1B)-adrenergic receptor (AR) in a transgenic mouse induced a neurodegenerative disease that resembled the parkinsonian-like syndrome called multiple system atrophy (MSA). We now report that our mouse model has cytoplasmic inclusion

Incidence and extent of Lewy body-related alpha-synucleinopathy in aging human olfactory bulb.

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We investigated the incidence and extent of Lewy body (LB)-related alpha-synucleinopathy (LBAS) in the olfactory bulb (OB) in 320 consecutive autopsy patients from a general geriatric hospital (mean age, 81.5 +/- 8.5 years). Paraffin sections were immunostained with anti-phosphorylated

The role of phosphorylation in synucleinopathies: focus on Parkinson's disease.

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Synuclein is a soluble, natively unfolded protein that is highly enriched in the presynaptic terminals of neurons in the central nervous system. Interest in -synuclein has increased markedly following the discovery of a relationship between its dysfunction and several neurodegenerative diseases,

Oxidative and nitrative alpha-synuclein modifications and proteostatic stress: implications for disease mechanisms and interventions in synucleinopathies.

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Alpha-synuclein (ASYN) is a major constituent of the typical protein aggregates observed in several neurodegenerative diseases that are collectively referred to as synucleinopathies. A causal involvement of ASYN in the initiation and progression of neurological diseases is suggested by observations

Functional consequences of alpha-synuclein tyrosine nitration: diminished binding to lipid vesicles and increased fibril formation.

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Previous studies have shown the presence of nitrated alpha-synuclein (alpha-syn) in human Lewy bodies and other alpha-syn inclusions. Herein, the effects of tyrosine nitration on alpha-syn fibril formation, lipid binding, chaperone-like function, and proteolytic degradation were systematically

Tyrosine kinase inhibition facilitates autophagic SNCA/α-synuclein clearance.

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The effects of ABL1/ABL inhibition on clearance of SNCA/α-synuclein were evaluated in animal models of α-synucleinopathies. Parkinson disease (PD) is a movement disorder characterized by death of dopaminergic substantia nigra (SN) neurons and brain accumulation of SNCA. The tyrosine kinase ABL1 is

Tyrosine and serine phosphorylation of alpha-synuclein have opposing effects on neurotoxicity and soluble oligomer formation.

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Mutations in the neuronal protein alpha-synuclein cause familial Parkinson disease. Phosphorylation of alpha-synuclein at serine 129 is prominent in Parkinson disease and influences alpha-synuclein neurotoxicity. Here we report that alpha-synuclein is also phosphorylated at tyrosine 125 in

Association of innervation-adjusted alpha-synuclein in arrector pili muscles with cardiac noradrenergic deficiency in autonomic synucleinopathies.

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BACKGROUND

Autonomic synucleinopathies feature deposition of the protein alpha-synuclein (AS) in neurons [e.g., Lewy body neurogenic orthostatic hypotension (nOH)] or glial cells (multiple system atrophy, MSA). AS in skin biopsies might provide biomarkers of these diseases;

Spectrum of abnormalities of sympathetic tyrosine hydroxylase and alpha-synuclein in chronic autonomic failure.

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OBJECTIVE Lewy body forms of primary chronic autonomic failure (CAF) such as incidental Lewy body disease (ILBD), Parkinson's disease (PD), and pure autonomic failure evolving into dementia with Lewy bodies (PAF+DLB) feature cardiac sympathetic denervation, whereas multiple system atrophy (MSA) in

Nilotinib Fails to Prevent Synucleinopathy and Cell Loss in a Mouse Model of Multiple System Atrophy.

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Multiple system atrophy (MSA) is a rare, untreatable neurodegenerative disorder characterized by accumulation of α-synuclein in oligodendroglial inclusions. As such, MSA is a synucleinopathy along with Parkinson's disease (PD) and dementia with Lewy bodies. Activation of the abelson

From the Cover: Arsenic Induces Accumulation of α-Synuclein: Implications for Synucleinopathies and Neurodegeneration.

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Synucleinopathies, including Parkinson's disease (PD), are neurodegenerative diseases characterized by accumulation of α-synuclein (SYN), a small neuronal protein with prion like properties that plays a central role in PD pathogenesis. SYN can misfold and generate toxic oligomers/aggregates, which

Oxidative damage linked to neurodegeneration by selective alpha-synuclein nitration in synucleinopathy lesions.

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Aggregated alpha-synuclein proteins form brain lesions that are hallmarks of neurodegenerative synucleinopathies, and oxidative stress has been implicated in the pathogenesis of some of these disorders. Using antibodies to specific nitrated tyrosine residues in alpha-synuclein, we demonstrate

Dityrosine cross-linking promotes formation of stable alpha -synuclein polymers. Implication of nitrative and oxidative stress in the pathogenesis of neurodegenerative synucleinopathies.

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Intracellular proteinaceous aggregates are hallmarks of many common neurodegenerative disorders, and recent studies have shown that alpha-synuclein is a major component of several pathological intracellular inclusions, including Lewy bodies in Parkinson's disease (PD) and glial cell inclusions in

alpha-Synucleinopathy in the human olfactory system in Parkinson's disease: involvement of calcium-binding protein- and substance P-positive cells.

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Hyposmia is an early symptom of idiopathic Parkinson's disease but the pathological bases of such dysfunction are largely unknown. The distribution of alpha-synuclein, which forms Lewy bodies and Lewy neurites, and the types of neurons (based on their neurotransmitters) affected by

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