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2014 ; 10
(7
): 1241-55
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gab.com Text
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Itraconazole suppresses the growth of glioblastoma through induction of
autophagy: involvement of abnormal cholesterol trafficking
#MMPMID24905460
Liu R
; Li J
; Zhang T
; Zou L
; Chen Y
; Wang K
; Lei Y
; Yuan K
; Li Y
; Lan J
; Cheng L
; Xie N
; Xiang R
; Nice EC
; Huang C
; Wei Y
Autophagy
2014[Jul]; 10
(7
): 1241-55
PMID24905460
show ga
Glioblastoma is one of the most aggressive human cancers with poor prognosis, and
therefore a critical need exists for novel therapeutic strategies for management
of glioblastoma patients. Itraconazole, a traditional antifungal drug, has been
identified as a novel potential anticancer agent due to its inhibitory effects on
cell proliferation and tumor angiogenesis; however, the molecular mechanisms
involved are still unclear. Here, we show that itraconazole inhibits the
proliferation of glioblastoma cells both in vitro and in vivo. Notably, we
demonstrate that treatment with itraconazole induces autophagic progression in
glioblastoma cells, while blockage of autophagy markedly reverses the
antiproliferative activities of itraconazole, suggesting an antitumor effect of
autophagy in response to itraconazole treatment. Functional studies revealed that
itraconazole retarded the trafficking of cholesterol from late endosomes and
lysosomes to the plasma membrane by reducing the levels of SCP2, resulting in
repression of AKT1-MTOR signaling, induction of autophagy, and finally inhibition
of cell proliferation. Together, our studies provide new insights into the
molecular mechanisms regarding the antitumor activities of itraconazole, and may
further assist both the pharmacological investigation and rational use of
itraconazole in potential clinical applications.