Title : Oncogenic B-RAF signaling in melanoma impairs the therapeutic advantage of autophagy inhibition.

Pub. Date : 2011 Apr 15

PMID : 21270111






3 Functional Relationships(s)
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1 RESULTS: Autophagy was activated in response to fenretinide or bortezomib in B-RAF wild-type cells, shown by increased conversion of LC3 to the autophagic vesicle-associated form (LC3-II) and redistribution to autophagosomes and autolysosomes, increased acidic vesicular organelle formation and autophagic vacuolization. Fenretinide B-Raf proto-oncogene, serine/threonine kinase Homo sapiens
2 Knockdown of Beclin-1 or ATG7 sensitized B-RAF wild-type cells to fenretinide- or bortezomib-induced cell death, demonstrating a pro-survival function of autophagy. Fenretinide B-Raf proto-oncogene, serine/threonine kinase Homo sapiens
3 In addition, autophagy was partially reactivated in B-RAF-mutated cells treated with the BH3 mimetic ABT737 in combination with fenretinide or bortezomib, suggesting autophagy resistance is partly mediated by abrogated Beclin-1 function. Fenretinide B-Raf proto-oncogene, serine/threonine kinase Homo sapiens