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2015 ; 7
(6
): 831-47
Nephropedia Template TP
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ZEB1-associated drug resistance in cancer cells is reversed by the class I HDAC
inhibitor mocetinostat
#MMPMID25872941
Meidhof S
; Brabletz S
; Lehmann W
; Preca BT
; Mock K
; Ruh M
; Schüler J
; Berthold M
; Weber A
; Burk U
; Lübbert M
; Puhr M
; Culig Z
; Wellner U
; Keck T
; Bronsert P
; Küsters S
; Hopt UT
; Stemmler MP
; Brabletz T
EMBO Mol Med
2015[Jun]; 7
(6
): 831-47
PMID25872941
show ga
Therapy resistance is a major clinical problem in cancer medicine and crucial for
disease relapse and progression. Therefore, the clinical need to overcome it,
particularly for aggressive tumors such as pancreatic cancer, is very high.
Aberrant activation of an epithelial-mesenchymal transition (EMT) and an
associated cancer stem cell phenotype are considered a major cause of therapy
resistance. Particularly, the EMT-activator ZEB1 was shown to confer stemness and
resistance. We applied a systematic, stepwise strategy to interfere with ZEB1
function, aiming to overcome drug resistance. This led to the identification of
both its target gene miR-203 as a major drug sensitizer and subsequently the
class I HDAC inhibitor mocetinostat as epigenetic drug to interfere with ZEB1
function, restore miR-203 expression, repress stemness properties, and induce
sensitivity against chemotherapy. Thereby, mocetinostat turned out to be more
effective than other HDAC inhibitors, such as SAHA, indicating the relevance of
the screening strategy. Our data encourage the application of mechanism-based
combinations of selected epigenetic drugs with standard chemotherapy for the
rational treatment of aggressive solid tumors, such as pancreatic cancer.