Project description:High expression of the FOXP1 transcription factor distinguishes the highly aggressive Activated B Cell (ABC) type of Diffuse Large B Cell Lymphoma (DLBCL) from the more indolent Germinal Center (GCB) DLBCL subtype and is correlated with poor prognosis. A genetic or functional role for FOXP1 in lymphomagenesis and/or tumor maintenance, however, remains unknown. Here, we report that sustained expression of FOXP1 is necessary for ABC DLBCL cell line survival. Genome-wide transcript profiling reveals that FOXP1 acts directly and indirectly by enforcing expression of known ABC DLBCL hallmarks, including the classical NF-kappaB survival pathway. Our data further suggest that FOXP1 maintains the ABC subtype distinction by repressing gene expression programs dominant in GCB DLBCL and supports a model in which the target of ABC DLBCL transformation is a transitory cell type en route from the germinal center B cell to the terminally differentiated plasma cell.
Project description:ChIP-Sequencing of 4 diffuse large B-cell lymphoma cell lines expressing different amounts of FOXP1 was performed in order to identify target genes bound by the transcription factor FOXP1.
Project description:Golcadomide is a potential first-in-class Aiolos/Ikaros-degrading CRBN E3 ligase modulator (CELMoD) agent designed for the treatment of non-Hodgkin lymphoma (NHL) including diffuse large B-cell lymphoma (DLBCL). Aiolos and Ikaros are two critical lineage factors in lymphoid development that sustain lymphoma growth through recruitment of transcriptional complexes to enhancers and promotors of target genes. Through an epigenetic compound library screening, we found that BET inhibitors sensitize DLBCL cells to golcadomide. Using phenotypic assays and a multi-omics approach, we found that the combination treatment led to synergistic inhibition of MYC and E2F target genes, induction of p21, and subsequent cell cycle arrest. Genome-wide analysis revealed co-occupancy of Aiolos, Ikaros and BRD4 at the promoters of MYC and other genes involved in proliferation, as well as MYC-activating enhancers.
Project description:Golcadomide is a potential first-in-class Aiolos/Ikaros-degrading CRBN E3 ligase modulator (CELMoD) agent designed for the treatment of non-Hodgkin lymphoma (NHL) including diffuse large B-cell lymphoma (DLBCL). Aiolos and Ikaros are two critical lineage factors in lymphoid development that sustain lymphoma growth through recruitment of transcriptional complexes to enhancers and promotors of target genes. Through an epigenetic compound library screening, we found that BET inhibitors sensitize DLBCL cells to golcadomide. Using phenotypic assays and a multi-omics approach, we found that the combination treatment led to synergistic inhibition of MYC and E2F target genes, induction of p21, and subsequent cell cycle arrest. Genome-wide analysis revealed co-occupancy of Aiolos, Ikaros and BRD4 at the promoters of MYC and other genes involved in proliferation, as well as MYC-activating enhancers.
Project description:Golcadomide is a potential first-in-class Aiolos/Ikaros-degrading CRBN E3 ligase modulator (CELMoD) agent designed for the treatment of non-Hodgkin lymphoma (NHL) including diffuse large B-cell lymphoma (DLBCL). Aiolos and Ikaros are two critical lineage factors in lymphoid development that sustain lymphoma growth through recruitment of transcriptional complexes to enhancers and promotors of target genes. Through an epigenetic compound library screening, we found that BET inhibitors sensitize DLBCL cells to golcadomide. Using phenotypic assays and a multi-omics approach, we found that the combination treatment led to synergistic inhibition of MYC and E2F target genes, induction of p21, and subsequent cell cycle arrest. Genome-wide analysis revealed co-occupancy of Aiolos, Ikaros and BRD4 at the promoters of MYC and other genes involved in proliferation, as well as MYC-activating enhancers.