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2015 ; 6
(17
): 14953-69
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Targeting Notch1 and proteasome as an effective strategy to suppress T-cell
lymphoproliferative neoplasms
#MMPMID25879451
Yang L
; Zhang S
; George SK
; Teng R
; You X
; Xu M
; Liu H
; Sun X
; Amin HM
; Shi W
Oncotarget
2015[Jun]; 6
(17
): 14953-69
PMID25879451
show ga
The T-cell lymphoproliferative neoplasms (T-LPN) are characterized by a poor
clinical outcome. Current therapeutics are mostly non-selective and may induce
harmful side effects. It has been reported that NOTCH1 activation mutations
frequently associate T-LPN. Because anti-Notch1 based therapies such as
?-secretase inhibitors (GSI) are less efficient and induce considerable side
effects, we hypothesized that combining low concentrations of GSI and the
proteasome inhibitor bortezomib (BTZ) may provide an effective and tolerable
approach to treat T-LPN. Hence, we analyzed the in vitro and in vivo effects of
GSI-I and BTZ, alone or in combination, against T-LPN. GSI-I and BTZ
synergistically decreased cell viability, proliferation, and colony formation,
and induced apoptosis in T-LPN cell lines. Furthermore, combining GSI-I and BTZ
decreased the viability of primary T-LPN cells from patients. These effects were
accompanied by deregulation of Notch1, AKT, ERK, JNK, p38 MAPK, and NF-?B
survival pathways. Moreover, combination treatment inhibited T-LPN tumor growth
in nude mice. In all experiments, combining low concentrations of GSI-I and BTZ
was superior to using a single agent. Our data support that a synergistic
antitumor activity exists between GSI-I and BTZ, and provide a rationale for
successful utilization of dual Notch1 and proteasome inhibition to treat T-LPN.
|Adult
[MESH]
|Aged
[MESH]
|Amyloid Precursor Protein Secretases/*antagonists & inhibitors
[MESH]