Journal
AUTOPHAGY
Volume 7, Issue 8, Pages 801-802Publisher
LANDES BIOSCIENCE
DOI: 10.4161/auto.7.8.16609
Keywords
Atg1; autophagosome; flux; lysosome; macroautophagy; phagophore; regulation; stress; TOR; Ulk1; vacuole
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Considerable attention has been paid to the topic of autophagy induction. In part, this is because of the potential for modulating this process for therapeutic purposes. Of course we know that induced autophagy can also be problematic-for example, when trying to eliminate an established tumor that might be relying on autophagy for its own cytoprotective uses. Accordingly, inhibitory mechanisms have been considered; however, the corresponding studies have tended to focus on the pathways that block autophagy under noninducing conditions, such as when nutrients are available. In contrast, relatively little is known about the mechanisms for inhibiting autophagy under inducing conditions. Yet, this type of regulation must be occurring on a routine basis. We know that dysregulation of autophagy, e. g., due to improper activation of Beclin 1 leading to excessive autophagy activity, can cause cell death. 1 Accordingly, we assume that during starvation or other inducing conditions there must be a mechanism to modulate autophagy. That is, once you turn it on, you do not want to let it continue unchecked. But how is autophagy downregulated when the inducing conditions still exist?
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