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2017 ; 8
(4
): 555-562
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Combined Targeting of mTOR and Akt Using Rapamycin and MK-2206 in The Treatment
of Tuberous Sclerosis Complex
#MMPMID28367235
Ji S
; Lin W
; Wang L
; Ni Z
; Jin F
; Zha X
; Fei G
J Cancer
2017[]; 8
(4
): 555-562
PMID28367235
show ga
Tuberous sclerosis complex (TSC), caused by loss-of-function mutations in the
TSC1 or TSC2 genes, is an autosomal dominant disease characterized by benign
tumor formation in multiple organs. Hyperactivation of mammalian target of
rapamycin (mTOR) is the primary alteration underlying TSC tumor. Thus, rapamycin,
as an mTOR specific inhibitor, has been assumed as a potential drug for the
treatment of TSC. However, its application in TSC patients has been limited due
to side effects. By analyzing Tsc1- or Tsc2-null mouse embryonic fibroblasts
(MEFs), we found that loss of TSC1 or TSC2 led to a decreased sensitivity to
MK-2206, a novel allosteric Akt inhibitor. Ectopic expression of a constitutively
activated Akt (myristoylated Akt-1, myrAkt-1) sensitized Tsc2-null and Tsc1-null
MEFs to MK-2206. Furthermore, MK-2206 increased the cytotoxicity of rapamycin in
Tsc1(-/-) or Tsc2(-/-) MEFs. Moreover, the benefit of the combinatorial treatment
was also demonstrated in a TSC xenograft mouse model. We conclude that the
combination of rapamycin and MK-2206 may be utilized as a new therapeutic regimen
for TSC.