A major issue in Alzheimer's disease (AD) research is to find some new therapeutic drug which decrease Amyloid-beta (Aβ) aggregation. From a therapeutic point of view the major question is whether pharmacological inhibition of inflammation pathways will be able to safely reverse or slow the course of disease. Natural compounds are capable of binding to different targets implicated in AD and exert neuroprotective effects.
View Article and Find Full Text PDFSeizure patterns identified in focal epilepsies caused by diverse etiologies are likely due to different pathogenic mechanisms. We describe here a novel, region-specific focal seizure pattern that mimics seizure activity observed in a subpopulation of patients submitted to presurgical monitoring with intracerebral electrodes. Distinctive seizure-like events (SLEs) are induced in the olfactory regions by acute treatment of both tangential brain slices and the isolated guinea pig brain with the potassium channel blocker 4-aminopyridine.
View Article and Find Full Text PDFDivry van Bogaert Syndrome (DBS) is a familial juvenile-onset disorder characterized by livedo racemosa, white matter disease, dementia, epilepsy and angiographic finding of "cerebral angiomatosis". A similar syndrome including livedo racemosa and cerebrovascular disease, often associated with anticardiolipin antibodies, has been described as Sneddon Syndrome (SS) highlighting the question whether these two conditions have to be considered different entities or indeed different features of a unique syndrome. Herein, we report the clinical, neuroradiological, histopathological findings and follow up of three cases diagnosed as Divry-van Bogaert Syndrome, including an updated review of literature of both DBS and SS cases.
View Article and Find Full Text PDFActivation of c-Jun N-terminal kinase (JNK) signaling pathway is a critical step for neuronal death occurring in several neurological conditions. JNKs can be activated via receptor tyrosine kinases, cytokine receptors, G-protein coupled receptors and ligand-gated ion channels, including the NMDA glutamate receptors. While JNK has been generally associated with postsynaptic NMDA receptors, its presynaptic role remains largely unexplored.
View Article and Find Full Text PDFFast neural conduction requires accumulation of Na(+) channels at nodes of Ranvier. Dedicated adhesion molecules on myelinating cells and axons govern node organization. Among those, specific laminins and dystroglycan complexes contribute to Na(+) channel clustering at peripheral nodes by unknown mechanisms.
View Article and Find Full Text PDFObjective: To describe a patient with facial onset sensory motor neuronopathy (FOSMN) syndrome associated with a heterozygous D90A mutation in superoxide dismutase (SOD1) gene.
Methods: The patient underwent neurological and neurophysiologic examinations, including blink and jaw reflexes, sural nerve and skin biopsies, and analysis of TARDBP, FUS and C9ORF72 genes.
Results: Neurological examination showed diffuse fasciculations, bulbar signs, hypotrophy and weakness of facial, neck, shoulder girdle and first interosseus muscles, and absent corneal reflex.
Aβ is the main component of amyloid deposits in Alzheimer disease (AD) and its aggregation into oligomers, protofibrils and fibrils is considered a seminal event in the pathogenesis of AD. Aβ with C-terminus at residue 42 is the most abundant species in parenchymal deposits, whereas Aβ with C-terminus at residue 40 predominates in the amyloid of the walls of large vessels. Aβ peptides with other C-termini have not yet been thoroughly investigated.
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