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2007:
Johnston Angela L M; Lun Xueqing; Rahn Jennifer J; Liacini Abdelhamid; Wang Limei; Hamilton Mark G; Parney Ian F; Hempstead Barbara L; Robbins Stephen M; Forsyth Peter A; Senger Donna L
The p75 neurotrophin receptor is a central regulator of glioma invasion.
PLoS biology 2007;
5(
8):.
The invasive nature of cancers in general, and malignant gliomas in particular, is a major clinical problem rendering tumors incurable by conventional therapies. Using a novel invasive glioma mouse model established by serial in vivo selection, we identified the p75 neurotrophin receptor (p75(NTR)) as a critical regulator of glioma invasion. Through a series of functional, biochemical, and clinical studies, we found that p75(NTR) dramatically enhanced migration and invasion of genetically distinct glioma and frequently exhibited robust expression in highly invasive glioblastoma patient specimens. Moreover, we found that p75(NTR)-mediated invasion was neurotrophin dependent, resulting in the activation of downstream pathways and producing striking cytoskeletal changes of the invading cells. These results provide the first evidence for p75(NTR) as a major contributor to the highly invasive nature of malignant gliomas and identify a novel therapeutic target.
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