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Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Homo sapiens

PROVIDER: GSE158916 | GEO | 2021/06/21

REPOSITORIES: GEO

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Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma.

Project description: Not available

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Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [RNA-Seq]

Project description:Systemic anaplastic large cell lymphoma (ALCL) is an aggressive T-cell lymphoma comprising ALK-positive (ALK+) and ALK-negative (ALK−) as well as breast implant-associated (BIA)-ALCL. The prognosis for ALCL, ALK− in particular is poor, and already in second line there is an unmet medical need for effective treatment options. To identify genes defining ALCL cell state and dependencies, we here started by an unbiased characterization of super-enhancer regions by genome-wide H3K27ac chromatin immunoprecipitation sequencing (ChIP-seq). We identified, in addition to known key regulators, the AP-1 transcription factor member BATF3 and IL-2 receptor (IL2R) components among the genes with most extensively H3K27-acetylated regulatory regions. Consistently, specific and high-level expression of the IL-2R subunits, IL-2Rα, IL-2Rβ and IL-2Rγ in ALCL correlate with BATF3 expression. Confirming a regulatory link, expression of IL-2R subunits decreases following BATF3 knockout, and BATF3 is recruited to AP-1 sites in IL2R regulatory regions. Functionally, IL-2, IL-15 and Neo-2/15, a hyper-stable IL-2/IL-15 mimic, accelerate growth of ALCL cells and activate STAT1, STAT5 and ERK, but not STAT3. In line, strong IL-2Rα expression in ALCL patients is linked to more aggressive clinical presentation. Finally, we demonstrate highly efficient killing of ALCL cells by an IL-2Rα-targeting antibody-drug conjugate in vitro and in vivo. Our results highlight the importance of the BATF3/IL-2R module for ALCL biology and identify IL-2Rα as the target of a promising treatment strategy for ALCL.

2021-06-21 | GSE158893 | GEO

Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [ChIP-Seq]

2021-06-21 | GSE158915 | GEO

Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma

Project description:Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma

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Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [ChIP-Seq]

Project description:Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [ChIP-Seq]

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Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [RNA-Seq]

Project description:Super-enhancer-based identification of a BATF3/IL-2R-module reveals vulnerabilities in anaplastic large cell lymphoma [RNA-Seq]

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The AP-1 -BATF and -BATF3 module is essential for growth, survival and TH17/ILC3 skewing of anaplastic large cell lymphoma

Project description:Transcription factor AP-1 is constitutively activated and IRF4 drives growth and survival in ALK+ and ALK– Anaplastic Large Cell Lymphoma (ALCL). Here we demonstrate high-level expression of BATF and BATF3 in ALCL, irrespective of the ALK-status. Both BATFs bind classical AP-1 motifs and interact with in ALCL deregulated AP-1 factors. Together with IRF4, they co-occupy AP-1-IRF composite elements (AICE), differentiating ALCL from non-ALCL. Gene-specific inactivation of BATFs by CRISPR/Cas9 or siRNAs, or global AP-1 inhibition by the dominant-negative A-Fos results in ALCL growth retardation and/or cell death in vitro and in vivo. Furthermore, the AP-1-BATF module establishes TH17 / innate lymphoid cell type 3 (ILC3)-associated gene expression in ALCL, including marker genes such as AHR, IL17F, IL22, IL26, IL23R, IL18R1 and RORγt. Elevated IL-17A and IL-17F levels were detected in pretreatment sera of a subset of children and adolescents with ALK+ ALCL. Finally, pharmacological inhibition of RORC as single treatment leads to cell death in ALCL cell lines, and, in combination with the ALK inhibitor crizotinib, enforces death induction in ALK+ ALCL. Our data highlight the crucial role of AP-1 / BATFs for ALCL biology and lead to the concept that ALCL might originate from ILC3 cells.

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