Abstract
Knowledge of oncogenic mutations can inspire therapeutic strategies that are synthetically lethal, affecting cancer cells while sparing normal cells. Lenalidomide is an active agent in the activated B cell-like (ABC) subtype of diffuse large B cell lymphoma (DLBCL), but its mechanism of action is unknown. Lenalidomide kills ABC DLBCL cells by augmenting interferon β (IFNβ) production, owing to the oncogenic MYD88 mutations in these lymphomas. In a cereblon-dependent fashion, lenalidomide downregulates IRF4 and SPIB, transcription factors that together prevent IFNβ production by repressing IRF7 and amplify prosurvival NF-κB signaling by transactivating CARD11. Blockade of B cell receptor signaling using the BTK inhibitor ibrutinib also downregulates IRF4 and consequently synergizes with lenalidomide in killing ABC DLBCLs, suggesting attractive therapeutic strategies.
| Original language | English |
|---|---|
| Pages (from-to) | 723-737 |
| Number of pages | 15 |
| Journal | Cancer Cell |
| Volume | 21 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 12 2012 |
Keywords
- Adaptor Proteins, Signal Transducing
- Adenine/analogs & derivatives
- Animals
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Blotting, Western
- Cell Line, Tumor
- DNA-Binding Proteins/genetics
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Regulatory Networks/drug effects
- Humans
- Interferon Regulatory Factors/genetics
- Interferon-beta/genetics
- Lenalidomide
- Lymphoma, Large B-Cell, Diffuse/drug therapy
- Mice
- Mice, Inbred NOD
- Mice, SCID
- NF-kappa B/genetics
- Peptide Hydrolases/genetics
- Piperidines
- Pyrazoles/administration & dosage
- Pyrimidines/administration & dosage
- RNA Interference
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction/drug effects
- Thalidomide/administration & dosage
- Transcription Factors/genetics
- Tumor Burden/drug effects
- Ubiquitin-Protein Ligases
- Xenograft Model Antitumor Assays