Abstract:
:The transcription factor Meis1 drives myeloid leukemogenesis in the context of Hox gene overexpression but is currently considered undruggable. We therefore investigated whether myeloid progenitor cells transformed by Hoxa9 and Meis1 become addicted to targetable signaling pathways. A comprehensive (phospho)proteomic analysis revealed that Meis1 increased Syk protein expression and activity. Syk upregulation occurs through a Meis1-dependent feedback loop. By dissecting this loop, we show that Syk is a direct target of miR-146a, whose expression is indirectly regulated by Meis1 through the transcription factor PU.1. In the context of Hoxa9 overexpression, Syk signaling induces Meis1, recapitulating several leukemogenic features of Hoxa9/Meis1-driven leukemia. Finally, Syk inhibition disrupts the identified regulatory loop, prolonging survival of mice with Hoxa9/Meis1-driven leukemia.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Mohr S,Doebele C,Comoglio F,Berg T,Beck J,Bohnenberger H,Alexe G,Corso J,Ströbel P,Wachter A,Beissbarth T,Schnütgen F,Cremer A,Haetscher N,Göllner S,Rouhi A,Palmqvist L,Rieger MA,Schroeder T,Bönig H,Müller-Tidow Cdoi
10.1016/j.ccell.2017.03.001subject
Has Abstractpub_date
2017-04-10 00:00:00pages
549-562.e11issue
4eissn
1535-6108issn
1878-3686pii
S1535-6108(17)30063-6journal_volume
31pub_type
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