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Actin is an abundant component of nerve terminals that has been implicated at multiple steps of the synaptic vesicle cycle, including reversible anchoring, exocytosis, and recycling of synaptic vesicles. In the present study we used the lamprey reticulospinal synapse to examine the role of actin at the site of synaptic vesicle recycling, the endocytic zone.(More)
Two pathways are responsible for the majority of regulated protein catabolism in eukaryotic cells: the ubiquitin-proteasome system (UPS) and lysosomal self-degradation through autophagy. Both processes are necessary for cellular homeostasis by ensuring continuous turnover and quality control of most intracellular proteins. Recent studies established that(More)
The ubiquitin-proteasome system and autophagy were long viewed as independent, parallel degradation systems with no point of intersection. By now we know that these degradation pathways share certain substrates and regulatory molecules and show coordinated and compensatory function. Two ubiquitin-like protein conjugation pathways were discovered that are(More)
Creutzfeldt-Jakob (CJD) and Alzheimer disease (AD) are accompanied by selective neuronal loss in the brain. We examined the regional and subcellular immunolocalization of ubiquitin, proteasomal subunits, and the heat-shock protein Hsp72 in control, CJD, and AD cases. In control and non-affected areas of disease cases, 20S proteasomes, 19S regulatory(More)
RATIONALE 3,4-Methylenedioxymethamphetamine (MDMA, "ecstasy") is a widely used recreational drug known to cause selective long-term serotonergic damage. OBJECTIVES The aim of this study was to characterize the ultrastructure of serotonergic pericarya and proximal neurites in the dorsal raphe nucleus as well as the ultrastructure of serotonergic axons in(More)
But what is important to me today about that committee and its report is not that we settled for all time the issue (as I believe we left a few loose ends), but the lens through which we chose to conduct the analysis. Our decision was that our " …discussion should focus on the bases for creation of works, the status of the contributors, the resources and(More)
Our aim was to investigate and to compare the intracellular distribution of ubiquitin, 20S proteasome, and all six proteasomal regulatory ATPases in non-diseased human and rat brains. Ubiquitin and ATPases S4 and S7 show dominant nuclear immunostaining, whereas subunits S6a, S6b, and S10b show mainly cytoplasmic immunostaining in both species. However, S8(More)
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