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KDM6B modulates MAPK pathway mediating multiple myeloma cell growth and survival
H Ohguchi1, T Harada1, M Sagawa1
1Jerome Lipper Myeloma Center, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
KDM6B promotes multiple myeloma (MM) cell growth by activating NF-κB and MAPK signaling pathways, independent of its demethylase activity. Targeting KDM6B offers a novel therapeutic strategy for MM treatment.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- Histone 3 lysine 27 (H3K27) demethylase KDM6B has cancer-type-specific roles.
- Its function is often linked to its H3K27 demethylase activity.
Purpose of the Study:
- To investigate the role and mechanism of KDM6B in multiple myeloma (MM).
- To determine if KDM6B is a viable therapeutic target for MM.
Main Methods:
- KDM6B knockdown and knockout in MM cells.
- RNA-sequencing and ChIP-qPCR analyses.
- Overexpression of catalytically inactive KDM6B.
Main Results:
- KDM6B is expressed in MM cells and its inhibition abrogates MM cell growth and survival.
- KDM6B is regulated by NF-κB signaling and activates MAPK signaling pathway genes (ELK1, FOS) independently of H3K27 demethylase activity.
- Downstream targets ELK1 and FOS are crucial for MM cell proliferation.
Conclusions:
- KDM6B links NF-κB and MAPK signaling pathways to mediate MM cell growth and survival.
- KDM6B represents a novel therapeutic target for multiple myeloma.
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