15 research outputs found

    Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)

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    Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition)1.

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    In 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Thus, it is important to formulate on a regular basis updated guidelines for monitoring autophagy in different organisms. Despite numerous reviews, there continues to be confusion regarding acceptable methods to evaluate autophagy, especially in multicellular eukaryotes. Here, we present a set of guidelines for investigators to select and interpret methods to examine autophagy and related processes, and for reviewers to provide realistic and reasonable critiques of reports that are focused on these processes. These guidelines are not meant to be a dogmatic set of rules, because the appropriateness of any assay largely depends on the question being asked and the system being used. Moreover, no individual assay is perfect for every situation, calling for the use of multiple techniques to properly monitor autophagy in each experimental setting. Finally, several core components of the autophagy machinery have been implicated in distinct autophagic processes (canonical and noncanonical autophagy), implying that genetic approaches to block autophagy should rely on targeting two or more autophagy-related genes that ideally participate in distinct steps of the pathway. Along similar lines, because multiple proteins involved in autophagy also regulate other cellular pathways including apoptosis, not all of them can be used as a specific marker for bona fide autophagic responses. Here, we critically discuss current methods of assessing autophagy and the information they can, or cannot, provide. Our ultimate goal is to encourage intellectual and technical innovation in the field

    An assessment of natural and human disturbance effects on Mexican ecosystems: current trends and research gaps

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    Accounting and Business Economics in Spain

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    Economia de la Empresa (Business Economics) emerged in Spain as a distinct academic discipline in the second half of the twentieth century. In its early years, Business Economics shared common influences with Accounting, particularly ideas and theories acquired from the translation of Italian and German works on Economia Aziendale and Betriebswirtschaftslehre. However, partly because of the institutional structure of Spanish universities, the two disciplines moved apart. During the Franco regime, Spanish accounting research was quite isolated, and with the return of democracy and the move towards greater European involvement much research was devoted to issues of financial accounting harmonization and standardization. This normative research was of little interest to Business Economics researchers, who were developing analytical approaches grounded in economic theory. More recently, academics working in the two disciplines have drawn on a wider range of theoretical approaches, from empirical studies to behavioural and organizational theory and institutional economics based on agency theory and transaction cost analysis. At present, the disciplines 'walk separately down the same road', but the new generation of researchers has the opportunity to bring Accounting and Business Economics closer together from an intellectual and scientific point of view.

    The circadian phase of antenatal glucocorticoid treatment affects the risk of behavioral disorders

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    During pregnancy, maternal endocrine signals drive fetal development and program the offspring's physiology. A disruption of maternal glucocorticoid (GC) homeostasis increases the child's risk of developing psychiatric disorders later in life. We here show in mice, that the time of day of antenatal GC exposure predicts the behavioral phenotype of the adult offspring. Offspring of mothers receiving GCs out-of-phase compared to their endogenous circadian GC rhythm show elevated anxiety, impaired stress coping, and dysfunctional stress-axis regulation. The fetal circadian clock determines the vulnerability of the stress axis to GC treatment by controlling GC receptor (GR) availability in the hypothalamus. Similarly, a retrospective observational study indicates poorer stress compensatory capacity in 5-year old preterm infants whose mothers received antenatal GCs towards the evening. Our findings offer insights into the circadian physiology of feto-maternal crosstalk and assign a role to the fetal clock as a temporal gatekeeper of GC sensitivity

    Detrital-zircon record of major Middle Triassic–Early Cretaceous provenance shift, central Mexico: demise of Gondwanan continental fluvial systems and onset of back-arc volcanism and sedimentation

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