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2016 ; 7
(34
): 55083-55097
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
MLN0128, a novel mTOR kinase inhibitor, disrupts survival signaling and triggers
apoptosis in AML and AML stem/ progenitor cells
#MMPMID27391151
Zeng Z
; Wang RY
; Qiu YH
; Mak DH
; Coombes K
; Yoo SY
; Zhang Q
; Jessen K
; Liu Y
; Rommel C
; Fruman DA
; Kantarjian HM
; Kornblau SM
; Andreeff M
; Konopleva M
Oncotarget
2016[Aug]; 7
(34
): 55083-55097
PMID27391151
show ga
mTOR activation leads to enhanced survival signaling in acute myeloid leukemia
(AML) cells. The active-site mTOR inhibitors (asTORi) represent a promising new
approach to targeting mTOR in AKT/mTOR signaling. MLN0128 is an
orally-administered, second-generation asTORi, currently in clinical development.
We examined the anti-leukemic effects and the mechanisms of action of MLN0128 in
AML cell lines and primary samples, with a particular focus on its effect in AML
stem/progenitor cells. MLN0128 inhibited cell proliferation and induced apoptosis
in AML by attenuating the activity of mTOR complex 1 and 2. Using time-of-flight
mass cytometry, we demonstrated that MLN0128 selectively targeted and
functionally inhibited AML stem/progenitor cells with high AKT/mTOR signaling
activity. Using the reverse-phase protein array technique, we measured expression
and phosphorylation changes in response to MLN0128 in 151 proteins from 24
primary AML samples and identified several pro-survival pathways that antagonize
MLN0128-induced cellular stress. A combined blockade of AKT/mTOR signaling and
these pro-survival pathways facilitated AML cell killing. Our findings provide a
rationale for the clinical use of MLN0128 to target AML and AML stem/progenitor
cells, and support the use of combinatorial multi-targeted approaches in AML
therapy.