Reference Detail

Ref Type Journal Article
PMID (25575134)
Authors Brandt WD, Schreck KC, Bar EE, Taylor I, Marchionni L, Raabe E, Eberhart CG, Rodriguez FJ
Title Notch signaling activation in pediatric low-grade astrocytoma.
Journal Journal of neuropathology and experimental neurology
Vol 74
Issue 2
Date 2015 Feb
URL
Abstract Text Pilocytic astrocytoma (PA) is the most common primary brain tumor in children; various signaling pathways have been implicated in its biology. The Notch signaling pathway has been found to play a role in the development, stem cell biology, and pathogenesis of several cancers, but its role in PA has not been investigated. We studied alterations in Notch signaling components in tumor tissue from 18 patients with PA and 4 with other low-grade astrocytomas to identify much needed therapeutic targets. We found that Notch pathway members were overexpressed at the mRNA (NOTCH1, NOTCH2, HEY1, HEY2) and protein (HES1) levels in PAs at various anatomic sites compared with non-neoplastic brain samples. These changes were not associated with specific BRAF alterations. Inhibiting the Notch pathway in the pediatric low-grade astrocytoma cell lines Res186 and Res259 using either RNA interference or a γ-secretase inhibitor resulted in variable, but significant, reduction in cell growth and migration. This study suggests a potential role for Notch signaling in pediatric low-grade astrocytoma tumorigenesis and that Notch signaling may be a viable pathway therapeutic target.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Unknown unknown juvenile astrocytoma not applicable MRK-003 Preclinical Actionable In a preclinical study, MRK-003 inhibited HES1 expression in pediatric low-grade astrocytoma cell lines in culture and decreased migration in 1 of 2 cell lines, but did not have a significant effect on cell growth (PMID: 25575134). 25575134