IFNγ induces Bcl3 expression by JAK1/STAT1/p65 signaling, resulting in increased IL-8 expression in ovarian cancer cells.
FEBS Open Bio 2023. [PMID:
37151134 PMCID:
PMC10392061 DOI:
10.1002/2211-5463.13624]
[Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 04/12/2023] [Accepted: 04/28/2023] [Indexed: 05/09/2023] Open
Abstract
We have recently shown that IFNγ, produced during cancer therapy, induces expression of the Bcl3 proto-oncogene in ovarian cancer (OC) cells, resulting in their increased proliferation, migration, and invasion, but the mechanisms are unknown. Here, we demonstrate that the IFNγ-induced Bcl3 expression is dependent on JAK1 and STAT1 signaling, and on p65 NFκB. Furthermore, the IFNγ-induced Bcl3 expression is associated with an increased occupancy of Ser-727 phosphorylated STAT1 and acetylated histone H3 at the Bcl3 promoter. Our data indicate that Bcl3 promotes expression of the pro-inflammatory chemokine interleukin-8 (IL-8) in OC cells. These findings identify Bcl3 as a novel target of IFNγ/JAK1/STAT1 signaling and suggest that targeting the JAK1/STAT1 pathway may suppress IFNγ-induced Bcl3 expression in ovarian cancer.
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