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Updated: May 24, 2025

Flow Cytometry-based Assay for the Monitoring of NK Cell Functions
Published on: October 30, 2016
BTK inhibitors enhance NKG2D ligand expression by regulating IL-10/STAT3 pathway in activated non-GCB diffuse large
Zhu-Xia Jia1,2, Bi-Tao Xiao1, Jin Li1
1Department of Hematology, The Second People's Hospital of Changzhou, the Third Affiliated Hospital of Nanjing Medical University.
Abstract:
The aim of this study is to explore the role of the IL-10/STAT3 pathway in the upregulation of natural killer group 2, member D (NKG2D) ligands (MICA and ULBP2) induced by Bruton's tyrosine kinase (BTK) inhibitors in non-germinal center B-cell-like diffuse large B-cell lymphoma cells. The expression levels of NKG2D ligands and the IL-10/STAT3 pathway in SUDHL4, U2932, and OCI-LY3 cells were analyzed using western blotting. After stimulation of the B-cell receptor signaling pathway with IgM antibodies, the expression levels of NKG2D ligands, as well as IL-10 and phosphorylated STAT3 (p-STAT3) were significantly reduced. In contrast, treatment with ibrutinib produced effects opposite to those induced by IgM antibodies. Additionally, treatment of U2932 and OCI-LY3 cells with the STAT3 inhibitor (STAT3-IN-1) led to an increase in NKG2D ligand expression and a decrease in IL-10 levels. When IL-10 neutralizing antibodies were introduced, p-STAT3 levels decreased, and NKG2D ligand expression increased. Similar outcomes were observed when the BTK inhibitors ACP-196 and BGB-3111 were administered. Our findings suggest that the IL-10/STAT3 pathway plays a key role in the upregulation of NKG2D ligands induced by BTK inhibitors in U2932 and OCI-LY3 cells.
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