Antagonism of B cell enhancer networks by STAT5 drives leukemia and poor patient survival

作者：Katerndahl Casey D S; Heltemes Harris Lynn M; Willette Mark J L; Henzler Christine M; Frietze Seth; Yang Rendong; Schjerven Hilde; Silverstein Kevin A T; Ramsey Laura B; Hubbard Gregory; Wells Andrew D; Kuiper Roland P; Scheijen Blanca; van Leeuwen Frank N; Muschen Markus; Kornblau Steven M^*; Farrar Michael A^*

来源：Nature Immunology, 2017, 18(6): 694-+.

DOI：10.1038/ni.3716

The transcription factor STAT5 has a critical role in B cell acute lymphoblastic leukemia (B-ALL). How STAT5 mediates this effect is unclear. Here we found that activation of STAT5 worked together with defects in signaling components of the precursor to the B cell antigen receptor (pre-BCR), including defects in BLNK, BTK, PKC beta, NF-kappa B1 and IKAROS, to initiate B-ALL. STAT5 antagonized the transcription factors NF-kappa B and IKAROS by opposing regulation of shared target genes. Super-enhancers showed enrichment for STAT5 binding and were associated with an opposing network of transcription factors, including PAX5, EBF1, PU.1, IRF4 and IKAROS. Patients with a high ratio of active STAT5 to NF-kappa B or IKAROS had more-aggressive disease. Our studies indicate that an imbalance of two opposing transcriptional programs drives B-ALL and suggest that restoring the balance of these pathways might inhibit B-ALL.

• 出版日期2017-6