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2018 ; 131
(15
): 1639-1653
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Glutaminolysis is a metabolic dependency in FLT3(ITD) acute myeloid leukemia
unmasked by FLT3 tyrosine kinase inhibition
#MMPMID29463564
Gallipoli P
; Giotopoulos G
; Tzelepis K
; Costa ASH
; Vohra S
; Medina-Perez P
; Basheer F
; Marando L
; Di Lisio L
; Dias JML
; Yun H
; Sasca D
; Horton SJ
; Vassiliou G
; Frezza C
; Huntly BJP
Blood
2018[Apr]; 131
(15
): 1639-1653
PMID29463564
show ga
FLT3 internal tandem duplication (FLT3(ITD)) mutations are common in acute
myeloid leukemia (AML) associated with poor patient prognosis. Although
new-generation FLT3 tyrosine kinase inhibitors (TKI) have shown promising
results, the outcome of FLT3(ITD) AML patients remains poor and demands the
identification of novel, specific, and validated therapeutic targets for this
highly aggressive AML subtype. Utilizing an unbiased genome-wide clustered
regularly interspaced short palindromic repeats (CRISPR)/Cas9 screen, we identify
GLS, the first enzyme in glutamine metabolism, as synthetically lethal with
FLT3-TKI treatment. Using complementary metabolomic and gene-expression analysis,
we demonstrate that glutamine metabolism, through its ability to support both
mitochondrial function and cellular redox metabolism, becomes a metabolic
dependency of FLT3(ITD) AML, specifically unmasked by FLT3-TKI treatment. We
extend these findings to AML subtypes driven by other tyrosine kinase (TK)
activating mutations and validate the role of GLS as a clinically actionable
therapeutic target in both primary AML and in vivo models. Our work highlights
the role of metabolic adaptations as a resistance mechanism to several TKI and
suggests glutaminolysis as a therapeutically targetable vulnerability when
combined with specific TKI in FLT3(ITD) and other TK activating mutation-driven
leukemias.