Stolonidiol, a marine natural product, has been reported to potentiate the activity of choline acetyltransferase (ChAT), the enzyme that produces the neurotransmitter acetylcholine. Here we report the total synthesis of stolonidiol starting from (R)-(+)-limonene. To identify the mechanism by which ChAT activity is increased, we sought to identify the biological target of stolonidiol. We show that stolonidiol binds to the phorbol ester binding site of protein kinase C (PKC), induces translocation of PKC to the cell membrane, and activates kinase activity. Furthermore, we confirmed the increase in ChAT activity observed upon treatment of cells with stolonidiol and show that this effect is mediated by PKC. Collectively, our data strongly suggest that PKC activation by stolonidiol is responsible for the resulting potentiation of ChAT activity.
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http://dx.doi.org/10.1021/jacs.7b01083 | DOI Listing |
Integr Psychol Behav Sci
December 2024
Comparative Minds Research Group, Departament de Psicologia, Universitat de Girona, Plaça Sant Domènech 9, Girona, 17004, Catalonia, Spain.
The present paper treats the issue of methodological assumptions in mainstream neuropsychology and, as counter-concepts, in Vygotsky's approach and Holzkamp's critical psychology. The analysis identifies four main assumptions concerning the methodology of mainstream neuropsychology, which are contrasted with the positions of other approaches. The methodologies of the mainstream neuropsychology vs.
View Article and Find Full Text PDFIntegr Psychol Behav Sci
December 2024
Faculty of Education, School of Education Culture & Society, Monash University, Melbourne, Australia.
The paper critically analyses cultural-historical activity theory (CHAT) in two most important aspects - the basic unit of analysis (i.e., in essence, the subject of the theory) and the main epistemological and methodological principles.
View Article and Find Full Text PDFBackground: Previous studies have confirmed the potential effectiveness of peer video feedback in the operational training of health care students. However, an appropriate theoretical framework to support peer video feedback has not been established. The cultural historical activity theory (CHAT) provides a suitable framework.
View Article and Find Full Text PDFGenetics
December 2024
Department of Molecular Biology, College of Agriculture, Life Sciences and Natural Resources, University of Wyoming, Laramie, Wyoming 82071.
Membrane trafficking is a conserved process required for import, export, movement, and distribution of proteins and other macromolecules within cells. The Caenorhabditis elegans NIMA-related kinases NEKL-2 (human NEK8/9) and NEKL-3 (human NEK6/7) are conserved regulators of membrane trafficking and are required for the completion of molting. Using a genetic approach we identified reduction-of-function mutations in tat-1 that suppress nekl-associated molting defects.
View Article and Find Full Text PDFGMS J Med Educ
December 2024
University Hospital Würzburg, Department of General, Visceral, Transplant, Vascular and Pediatric Surgery, Würzburg, Germany.
Aim: During the COVID-19 pandemic, social restrictions significantly impacted post-graduate training in pediatric surgery. This paper describes the implementation and continuation of a German-language, online training program for pediatric surgery residents, named "KiWI" (Kinderchirurgische Weiterbildung im Internet), which was established during the period of social distancing.
Method: "KiWI" was designed as a monthly, post-graduate online seminar course that combined practical relevance with theoretical knowledge.
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