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2017 ; 8
(14
): 22811-22824
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Biological basis and clinical study of glycogen synthase kinase- 3?-targeted
therapy by drug repositioning for glioblastoma
#MMPMID28423558
Furuta T
; Sabit H
; Dong Y
; Miyashita K
; Kinoshita M
; Uchiyama N
; Hayashi Y
; Hayashi Y
; Minamoto T
; Nakada M
Oncotarget
2017[Apr]; 8
(14
): 22811-22824
PMID28423558
show ga
BACKGROUND: Glycogen synthase kinase (GSK)-3? has emerged as an appealing
therapeutic target for glioblastoma (GBM). Here, we investigated the therapeutic
effect of the current approved drugs against GBM via inhibition of GSK3? activity
both, in experimental setting and in a clinical study for recurrent GBM patients
by repositioning existent drugs in combination with temozolomide (TMZ). MATERIALS
AND METHODS: Progression-free and overall survival rates were compared between
patients with low or high expression of active GSK3? in the primary tumor. GBM
cells and a mouse model were examined for the effects of GSK3?-inhibitory drugs,
cimetidine, lithium, olanzapine, and valproate. The safety and efficacy of the
cocktail of these drugs (CLOVA cocktail) in combination with TMZ were tested in
the mouse model and in a clinical study for recurrent GBM patients. RESULTS:
Activation of GSK3? in the tumor inversely correlated with patient survival as an
independent prognostic factor. CLOVA cocktail significantly inhibited cell
invasion and proliferation. The patients treated with CLOVA cocktail in
combination with TMZ showed increased survival compared to the control group
treated with TMZ alone. CONCLUSIONS: Repositioning of the GSK3?-inhibitory drugs
improved the prognosis of refractory GBM patients with active GSK3? in tumors.
Combination of CLOVA cocktail and TMZ is a promising approach for recurrent GBM.