NOTCH1 deletion

Using our resource, we identified Bcl11b as a strong and selective context-specific dependency in T-ALL. Although Bcl11b is a transcription factor, our results could serve as an starting point for novel therapies that interfere with Bcl11b function, such as molecular glue degraders or protein interaction inhibitors.

Despite a polytypic pattern of light chain expression, the neoplastic nature of biclonal CLL is suggested by a characteristic CLL phenotype and can be confirmed by cytogenetic and genomic analyses. The two clones with discordant light chain isotypes may share a "stem-line" cytogenetic abnormality, suggesting possible clonal evolution. Biclonal CLL is associated with NOTCH1 mutations, which may occur in a small subclone and gradually evolve in clonal size. Genomic analysis on light chain-sorted and/or chronologically collected samples may provide insight into clonal evolution in CLL.

We conclude that Notch1 mutations in normal epithelium are beneficial as wild-type Notch1 favors tumor expansion. NOTCH1 blockade may have therapeutic potential in preventing esophageal squamous cancer.

Anomalies in the NOTCH1 are the most common in patients with T-ALL. This mutation is associated with a more favorable prognosis.

In addition, we used data from TCGA to show that putative inactivating NOTCH1 mutations co-occur with KRAS mutations and genomic amplifications in lung adenocarcinomas. Our in vivo study provides evidence that Notch1 deficiency in mutated Kras driven lung carcinomas contributes to lung carcinogenesis in a subgroup of patients by increasing TAZ expression who might benefit from TAZ signaling blockade.