PI3K Signaling in Glioma-Animal Models and Therapeutic Challenges

被引:103
作者
Cheng, Christine K. [1 ]
Fan, Qi-Wen
Weiss, William A.
机构
[1] Univ Calif San Francisco, Dept Neurol, Brain Tumor Res Ctr, San Francisco, CA 94143 USA
关键词
glioblastoma; PI3; kinase; kinase inhibitors; Akt; metabolism; apoptosis; combination therapy; GROWTH-FACTOR RECEPTOR; PHOSPHATIDYLINOSITOL KINASE-ACTIVITY; INCREASED INSULIN SENSITIVITY; PHOSPHOINOSITIDE; 3-KINASE; GLIOBLASTOMA-MULTIFORME; CATALYTIC SUBUNIT; MICE LACKING; ONCOGENIC TRANSFORMATION; EMBRYONIC LETHALITY; P110-ALPHA ISOFORM;
D O I
10.1111/j.1750-3639.2008.00233.x
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
The PI3 kinase (PI3K) family plays a complex role in cell biology and metabolism. Signaling through the PI3Ks is frequently activated in many human cancers, including glioblastoma, because of gain-of-function mutations in PIK3CA or loss of PTEN. Experiments involving genetic mouse models and small molecule inhibitors have helped to elucidate the roles of the regulatory and catalytic subunits of PI3K in metabolism and cancer. Downstream of PI3K is Akt, a critical effector of growth, proliferation and survival. The suggested dependence of glioblastoma tumors on PI3K signaling implies that PI3K inhibitors should lead to effective killing of these cancer cells, but that has been shown not to be the case. The engagement of other survival pathways in response to PI3K inhibition prompts the need to develop combination therapies that promote cytotoxicity in cancer cells.
引用
收藏
页码:112 / 120
页数:9
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