Open AccessCurcumin Suppresses Malignant Glioma Cells Growth and Induces Apoptosis by Inhibition of SHH / GLI 1 Signaling Pathway in Vitro and Vivo
Author(s) -
Du WenZhong,
Feng Yan,
Wang XiaoFeng,
Piao XingYin,
Cui YuQiong,
Chen LingChao,
Lei XuHui,
Sun Xu,
Liu Xing,
Wang HanBing,
Li XianFeng,
Yang DongBo,
Sun Ying,
Zhao ZheFeng,
Jiang Tao,
Li YongLi,
Jiang ChuanLu
Publication year - 2013
Publication title -
cns neuroscience and therapeutics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 69
eISSN - 1755-5949
pISSN - 1755-5930
DOI - 10.1111/cns.12163
Subject(s) - curcumin , in vivo , apoptosis , in vitro , glioma , chemistry , cancer research , signal transduction , microbiology and biotechnology , pharmacology , biology , biochemistry , genetics
Summary Aims To study the role of curcumin on glioma cells via the SHH / GLI 1 pathway in vitro and vivo . Methods The effects of curcumin on proliferation, migration, apoptosis, SHH / GLI 1 signaling, and GLI 1 target genes expression were evaluated in multiple glioma cell lines in vitro . A U87‐implanted nude mice model was used to study the role of curcumin on tumor volume and the suppression efficacy of GLI 1. Results Curcumin showed cytotoxic effects on glioma cell lines in vitro . Both mRNA and protein levels of SHH / GLI 1 signaling ( S hh, S mo, GLI 1) were downregulated in a dose‐ and time‐dependent manner. Several GLI 1‐dependent target genes ( C yclin D 1, B cl‐2, F oxm1) were also downregulated. Curcumin treatment prevented GLI 1 translocating into the cell nucleus and reduced the concentration of its reporter. Curcumin suppressed cell proliferation, colony formation, migration, and induced apoptosis which was mediated partly through the mitochondrial pathway after an increase in the ratio of B ax to B cl2. Intraperitoneal injection of curcumin in vivo reduced tumor volume, GLI 1 expression, the number of positively stained cells, and prolonged the survival period compared with the control group. Conclusion This study shows that curcumin holds a great promise for SHH / GLI 1 targeted therapy against gliomas.