Tumor metastasis depends on the dynamic balance of the actomyosin cytoskeleton. As a key component of actomyosin filaments, non-muscle myosin-IIA disassembly contributes to tumor cell spreading and migration. However, its regulatory mechanism in tumor migration and invasion is poorly understood. Here, we found that oncoprotein hepatitis B X-interacting protein (HBXIP) blocked the myosin-IIA assemble state promoting breast cancer cell migration. Mechanistically, mass spectrometry analysis, co-immunoprecipitation assay and GST-pull down assay proved that HBXIP directly interacted with the assembly-competent domain (ACD) of non-muscle heavy chain myosin-IIA (NMHC-IIA). The interaction was enhanced by NMHC-IIA S1916 phosphorylation via HBXIP-recruited protein kinase PKCβII. Moreover, HBXIP induced the transcription of PRKCB, encoding PKCβII, by coactivating Sp1, and triggered PKCβII kinase activity. Interestingly, RNA sequencing and mouse metastasis model indicated that the anti-hyperlipidemic drug bezafibrate (BZF) suppressed breast cancer metastasis via inhibiting PKCβII-mediated NMHC-IIA phosphorylation in vitro and in vivo. We reveal a novel mechanism by which HBXIP promotes myosin-IIA disassembly via interacting and phosphorylating NMHC-IIA, and BZF can serve as an effective anti-metastatic drug in breast cancer.

Objective To investigate the effect of fast track surgery on perioperative nursing for the elderly patients with femoral neck fracture. Methods One hundred and twenty elderly patients with femoral neck fracture during April 2014 to December 2015 were divided into experiment group April to August 2014 and control group November 2013 to March 2014, 60 cases in each group. The experiment group was managed with fast tract surgery, while the control group was with conventional nursing. The two groups were compared from the rate of perioperative complications and hospital stay. Result The rates of congestion, infection of the urinary system and deep vein thrombosis in the experiment group were all lower than those of the control group (P<0.05) and the hospital stay in the experiment group was significantly shorter than that of the control group (P<0.05). Conclusion The application of the fast track surgery in nursing intervention for the elderly patients with femoral neck fracture can significantly shorten hospital stay and reduce the rates of congestion and infection of the urinary system, thus accelerating the rehabilitation of patients.