Abstract:
:NOTCH plays a pivotal role during normal development and in congenital disorders and cancer. γ-secretase inhibitors are commonly used to probe NOTCH function, but also block processing of numerous other proteins. We discovered a new class of small molecule inhibitor that disrupts the interaction between NOTCH and RBPJ, which is the main transcriptional effector of NOTCH signaling. RBPJ Inhibitor-1 (RIN1) also blocked the functional interaction of RBPJ with SHARP, a scaffold protein that forms a transcriptional repressor complex with RBPJ in the absence of NOTCH signaling. RIN1 induced changes in gene expression that resembled siRNA silencing of RBPJ rather than inhibition at the level of NOTCH itself. Consistent with disruption of NOTCH signaling, RIN1 inhibited the proliferation of hematologic cancer cell lines and promoted skeletal muscle differentiation from C2C12 myoblasts. Thus, RIN1 inhibits RBPJ in its repressing and activating contexts, and can be exploited for chemical biology and therapeutic applications.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Hurtado C,Safarova A,Smith M,Chung R,Bruyneel AAN,Gomez-Galeno J,Oswald F,Larson CJ,Cashman JR,Ruiz-Lozano P,Janiak P,Suzuki T,Mercola Mdoi
10.1038/s41598-019-46948-5subject
Has Abstractpub_date
2019-07-25 00:00:00pages
10811issue
1issn
2045-2322pii
10.1038/s41598-019-46948-5journal_volume
9pub_type
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