Abstract:
:5'AMP-activated kinase (AMPK) constitutes a hub for cellular metabolic and growth control, thus representing an ideal therapeutic target for prostate cancers (PCas) characterized by increased lipogenesis and activation of mTORC1 pathway. However, whether AMPK activation itself is sufficient to block cancer cell growth remains to be determined. A small molecule screening was performed and identified MT 63-78, a specific and potent direct AMPK activator. Here, we show that direct activation of AMPK inhibits PCa cell growth in androgen sensitive and castration resistant PCa (CRPC) models, induces mitotic arrest, and apoptosis. In vivo, AMPK activation is sufficient to reduce PCa growth, whereas the allelic loss of its catalytic subunits fosters PCa development. Importantly, despite mTORC1 blockade, the suppression of de novo lipogenesis is the underpinning mechanism responsible for AMPK-mediated PCa growth inhibition, suggesting AMPK as a therapeutic target especially for lipogenesis-driven PCas. Finally, we demonstrate that MT 63-78 enhances the growth inhibitory effect of AR signaling inhibitors MDV3100 and abiraterone. This study thus provides a rationale for their combined use in CRPC treatment.
journal_name
EMBO Mol Medjournal_title
EMBO molecular medicineauthors
Zadra G,Photopoulos C,Tyekucheva S,Heidari P,Weng QP,Fedele G,Liu H,Scaglia N,Priolo C,Sicinska E,Mahmood U,Signoretti S,Birnberg N,Loda Mdoi
10.1002/emmm.201302734subject
Has Abstractpub_date
2014-04-01 00:00:00pages
519-38issue
4eissn
1757-4676issn
1757-4684pii
emmm.201302734journal_volume
6pub_type
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journal_title:EMBO molecular medicine
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