Abstract：
:The intermediate filament protein Nestin serves as a biomarker for stem cells and has been used to identify subsets of cancer stem-like cells. However, the mechanistic contributions of Nestin to cancer pathogenesis are not understood. Here, we report that Nestin binds the hedgehog pathway transcription factor Gli3 to mediate the development of medulloblastomas of the hedgehog subtype. In a mouse model system, Nestin levels increased progressively during medulloblastoma formation, resulting in enhanced tumor growth. Conversely, loss of Nestin dramatically inhibited proliferation and promoted differentiation. Mechanistic investigations revealed that the tumor-promoting effects of Nestin were mediated by binding to Gli3, a zinc finger transcription factor that negatively regulates hedgehog signaling. Nestin binding to Gli3 blocked Gli3 phosphorylation and its subsequent proteolytic processing, thereby abrogating its ability to negatively regulate the hedgehog pathway. Our findings show how Nestin drives hedgehog pathway-driven cancers and uncover in Gli3 a therapeutic target to treat these malignancies. Cancer Res; 76(18); 5573-83. ©2016 AACR.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Li P,Lee EH,Du F,Gordon RE,Yuelling LW,Liu Y,Ng JM,Zhang H,Wu J,Korshunov A,Pfister SM,Curran T,Yang ZJdoi
10.1158/0008-5472.CAN-16-1547subject
Has Abstractpub_date
2016-09-15 00:00:00pages
5573-83issue
18eissn
0008-5472issn
1538-7445pii
0008-5472.CAN-16-1547journal_volume
76pub_type
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