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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
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Figure 1
Consequences of forced expression of the tumor suppressor gene ARHI in ovarian cancer.

In their study in this issue of the JCI, Lu et al. (8) report that controlled expression of the tumor suppressor gene ARHI in human ovarian cancer cells leads to autophagy. (A) ARHI expression was associated with interrupted PI3K signaling, which resulted in reversible (under conditions of transient ARHI expression) or irreversible (under conditions of chronic ARHI expression) autophagic cell death in vitro. (B) In contrast, ARHI-induced autophagy contributed to cell survival and tumor dormancy in ovarian cancer xenografts in mice, due to partially restored PI3K signaling from elements of the tumor microenvironment.