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2016 ; 35
(33
): 4407-13
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Gene amplification-associated overexpression of the RNA editing enzyme ADAR1
enhances human lung tumorigenesis
#MMPMID26640150
Anadón C
; Guil S
; Simó-Riudalbas L
; Moutinho C
; Setien F
; Martínez-Cardús A
; Moran S
; Villanueva A
; Calaf M
; Vidal A
; Lazo PA
; Zondervan I
; Savola S
; Kohno T
; Yokota J
; Ribas de Pouplana L
; Esteller M
Oncogene
2016[Aug]; 35
(33
): 4407-13
PMID26640150
show ga
The introduction of new therapies against particular genetic mutations in
non-small-cell lung cancer is a promising avenue for improving patient survival,
but the target population is small. There is a need to discover new potential
actionable genetic lesions, to which end, non-conventional cancer pathways, such
as RNA editing, are worth exploring. Herein we show that the adenosine-to-inosine
editing enzyme ADAR1 undergoes gene amplification in non-small cancer cell lines
and primary tumors in association with higher levels of the corresponding mRNA
and protein. From a growth and invasion standpoint, the depletion of ADAR1
expression in amplified cells reduces their tumorigenic potential in cell culture
and mouse models, whereas its overexpression has the opposite effects. From a
functional perspective, ADAR1 overexpression enhances the editing frequencies of
target transcripts such as NEIL1 and miR-381. In the clinical setting, patients
with early-stage lung cancer, but harboring ADAR1 gene amplification, have poor
outcomes. Overall, our results indicate a role for ADAR1 as a lung cancer
oncogene undergoing gene amplification-associated activation that affects
downstream RNA editing patterns and patient prognosis.