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The last decade has seen a sharp increase in the number of scientific publications describing physiological and pathological functions of extracellular vesicles (EVs), a collective term covering various subtypes of cell-released, membranous structures, called exosomes, microvesicles, microparticles, ectosomes, oncosomes, apoptotic bodies, and many other names. However, specific issues arise when working with these entities, whose size and amount often make them difficult to obtain as relatively pure preparations, and to characterize properly. The International Society for Extracellular Vesicles (ISEV) proposed Minimal Information for Studies of Extracellular Vesicles (“MISEV”) guidelines for the field in 2014. We now update these “MISEV2014” guidelines based on evolution of the collective knowledge in the last four years. An important point to consider is that ascribing a specific function to EVs in general, or to subtypes of EVs, requires reporting of specific information beyond mere description of function in a crude, potentially contaminated, and heterogeneous preparation. For example, claims that exosomes are endowed with exquisite and specific activities remain difficult to support experimentally, given our still limited knowledge of their specific molecular machineries of biogenesis and release, as compared with other biophysically similar EVs. The MISEV2018 guidelines include tables and outlines of suggested protocols and steps to follow to document specific EV-associated functional activities. Finally, a checklist is provided with summaries of key points.
Die Tagung rief dazu auf, die Verbindlichkeit von Versprechen als allgemeines Phänomen zu untersuchen, also zu ergründen, inwiefern man unabhängig von ihrer Ausgestaltung in konkreten Rechtsordnungen oder anderen Normensystemen von einer "vor-rechtlichen" Verbindlichkeit sprechen kann. Literarische Texte aller Zeiten bis hin zu den Mythen bezeugen die Bindung an das Wort als Urerfahrung, die von jeder gesellschaftlichen Konvention unabhängig erscheint. Ebenso kennen sie aber Verrat und offenen oder verdeckten Wortbruch, deren Folgen sie thematisieren. Strukturelle Verwandtschaften einerseits und gegenseitige Beeinflussung andererseits der literarischen und der rechtlichen Auseinandersetzung mit dem Versprechen sollten untersucht werden.