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|Ref Type||Journal Article|
|Authors||Cazes A, Lopez-Delisle L, Tsarovina K, Pierre-Eugène C, De Preter K, Peuchmaur M, Nicolas A, Provost C, Louis-Brennetot C, Daveau R, Kumps C, Cascone I, Schleiermacher G, Prignon A, Speleman F, Rohrer H, Delattre O, Janoueix-Lerosey I|
|Title||Activated Alk triggers prolonged neurogenesis and Ret upregulation providing a therapeutic target in ALK-mutated neuroblastoma.|
|Abstract Text||Activating mutations of the ALK (Anaplastic lymphoma Kinase) gene have been identified in sporadic and familial cases of neuroblastoma, a cancer of early childhood arising from the sympathetic nervous system (SNS). To decipher ALK function in neuroblastoma predisposition and oncogenesis, we have characterized knock-in (KI) mice bearing the two most frequent mutations observed in neuroblastoma patients. A dramatic enlargement of sympathetic ganglia is observed in AlkF1178L mice from embryonic to adult stages associated with an increased proliferation of sympathetic neuroblasts from E14.5 to birth. In a MYCN transgenic context, the F1178L mutation displays a higher oncogenic potential than the R1279Q mutation as evident from a shorter latency of tumor onset. We show that tumors expressing the R1279Q mutation are sensitive to ALK inhibition upon crizotinib treatment. Furthermore, our data provide evidence that activated ALK triggers RET upregulation in mouse sympathetic ganglia at birth as well as in murine and human neuroblastoma. Using vandetanib, we show that RET inhibition strongly impairs tumor growth in vivo in both MYCN/KI AlkR1279Q and MYCN/KI AlkF1178L mice. Altogether, our findings demonstrate the critical role of activated ALK in SNS development and pathogenesis and identify RET as a therapeutic target in ALK mutated neuroblastoma.|
|Molecular Profile||Treatment Approach|
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|Gene||Variant||Impact||Protein Effect||Variant Description||Associated with drug Resistance|
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|ALK R1275Q||neuroblastoma||sensitive||Vandetanib||Preclinical||Actionable||In a preclinical study, Caprelsa (vandetanib) treatment resulted in decreased tumor weight in a Mycn-overexpressing neuroblastoma transgenic mouse model with ALK R1275Q (corresponds to R1279Q in mouse) and subsequent upregulation of Ret (PMID: 24811913).||24811913|
|ALK F1174L||neuroblastoma||sensitive||Vandetanib||Preclinical||Actionable||In a preclinical study, Caprelsa (vandetanib) treatment resulted in decreased tumor weight in a Mycn-overexpressing neuroblastoma transgenic mouse model with ALK F1174L (corresponds to F1178L in mouse) and subsequent upregulation of Ret (PMID: 24811913).||24811913|
|ALK R1275Q||neuroblastoma||conflicting||Crizotinib||Preclinical||Actionable||In a preclinical study, Xalkori (crizotinib) treatment resulted in decreased tumor weight in a Mycn-overexpressing neuroblastoma transgenic mouse model with ALK R1275Q (corresponds to R1279Q in mouse) and subsequent upregulation of Ret (PMID: 24811913).||24811913|