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Jingjing Yuan, Qing Zhang, Shengsheng Wu, Suran Yan, Ran Zhao, Yajuan Sun, Xiaoxu Tian, Keshu Zhou Department of Hematology, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, People’s Republic of ChinaCorrespondence: Keshu ZhouDepartment of Hematology, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, People’s Republic of ChinaTel/Fax +86-371-65587513Email drzhouks77@163.comBackground: Mantle cell lymphoma (MCL) is an aggressive malignancy that accounts for 5– 10% of non-Hodgkin’s lymphoma. MiRNA-223-3p has been demonstrated to be down-regulated in MCL and is a useful prognostic factor. However, little is known about underlying molecular mechanism of miRNA-233-3p in MCL.Methods: The expression levels of miRNA-223-3p and CHUK mRNA in MCL cells were detected by real-time quantitative PCR (RT-qPCR). The effects of miRNA-223-3p/CHUK overexpression/knockdown on MCL cell proliferation and apoptosis were measured by CCK-8 assay and annexin V PE/7-AAD-based flow cytometry/TUNEL assay, respectively. A nude mouse subcutaneous xenograft model was used to further evaluate the potential effects in vivo. Dual-luciferase reporter assay was used to verify the inhibitory effect of miRNA-223-3p on CHUK. Furthermore, the regulatory function of miRNA-223-3p on the CHUK/NF-ƘB2 axis was assessed by RT-qPCR, western blot and immunofluorescence.Results: In the present study, miRNA-223-3p overexpression inhibited proliferation and accelerated apoptosis of MCL cells in vitro and in vivo. The results of Luciferase reporter assay showed that CHUK was a direct target of miRNA-223-3p in HEK293T cells. Furthermore, the results of RT-qPCR, western blot confirmed that CHUK was targeted and negatively regulated by miRNA-223-3p for repressing NF-ƘB2 pathway activation in MCL cells. Importantly, CHUK overexpression promoted proliferation and suppressed apoptosis of MCL cells, whereas CHUK knockdown reversed down-regulated miRNA-223-3p -accelerated cell proliferation in vitro.Conclusion: In conclusion, miRNA-223-3p affects MCL development by regulating the CHUK/NF-ƘB2 signaling pathway, which is crucial to provide a novel therapeutic strategy.Keywords: mantle cell lymphoma, miRNA-223-3p, CHUK, NF-ƘB2 signaling pathway, disease progression

Jingjing Yuan, Qing Zhang, Shengsheng Wu, Suran Yan, Ran Zhao, Yajuan Sun, Xiaoxu Tian, Keshu Zhou Department of Hematology, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, People’s Republic of ChinaCorrespondence: Keshu ZhouDepartment of Hematology, Affiliated Cancer Hospital of Zhengzhou University, Henan Cancer Hospital, Zhengzhou, People’s Republic of ChinaTel/Fax +86-371-65587513Email drzhouks77@163.comBackground: Mantle cell lymphoma (MCL) is an aggressive malignancy that accounts for 5– 10% of non-Hodgkin’s lymphoma. MiRNA-223-3p has been demonstrated to be down-regulated in MCL and is a useful prognostic factor. However, little is known about underlying molecular mechanism of miRNA-233-3p in MCL.Methods: The expression levels of miRNA-223-3p and CHUK mRNA in MCL cells were detected by real-time quantitative PCR (RT-qPCR). The effects of miRNA-223-3p/CHUK overexpression/knockdown on MCL cell proliferation and apoptosis were measured by CCK-8 assay and annexin V PE/7-AAD-based flow cytometry/TUNEL assay, respectively. A nude mouse subcutaneous xenograft model was used to further evaluate the potential effects in vivo. Dual-luciferase reporter assay was used to verify the inhibitory effect of miRNA-223-3p on CHUK. Furthermore, the regulatory function of miRNA-223-3p on the CHUK/NF-ƘB2 axis was assessed by RT-qPCR, western blot and immunofluorescence.Results: In the present study, miRNA-223-3p overexpression inhibited proliferation and accelerated apoptosis of MCL cells in vitro and in vivo. The results of Luciferase reporter assay showed that CHUK was a direct target of miRNA-223-3p in HEK293T cells. Furthermore, the results of RT-qPCR, western blot confirmed that CHUK was targeted and negatively regulated by miRNA-223-3p for repressing NF-ƘB2 pathway activation in MCL cells. Importantly, CHUK overexpression promoted proliferation and suppressed apoptosis of MCL cells, whereas CHUK knockdown reversed down-regulated miRNA-223-3p -accelerated cell proliferation in vitro.Conclusion: In conclusion, miRNA-223-3p affects MCL development by regulating the CHUK/NF-ƘB2 signaling pathway, which is crucial to provide a novel therapeutic strategy.Keywords: mantle cell lymphoma, miRNA-223-3p, CHUK, NF-ƘB2 signaling pathway, disease progression