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Ravi K. Amaravadi
Published in Volume 118, Issue 12
J Clin Invest. 2008; 118(12):3837–3840 doi:10.1172/JCI37667
Abstract | Full text | PDF
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Figure 2
The magnitude of autophagy may determine the fate of cancer cells in vivo.

This conceptual model proposes a relationship between the magnitude of cancer cell autophagy and its consequences on cell death and cell survival. As reported by Lu et al., expression of the tumor suppressor gene ARHI suppresses signal transduction through PI3K signaling, while factors within the tumor microenvironment maintain PI3K signaling within tumor cells (8). The magnitude of autophagy may be inversely proportional to PI3K signaling, and thresholds may exist within cancer cells for the magnitude of autophagy that leads to cell death versus the magnitude of autophagy that leads to cell survival.