Background and purpose:The cortical actin-binding protein,cortactin,participates in several functions in the cytoskeleton system,cellular signal transduction and cell adhesion.There is also increasing evidence that it regulates tumor invasion and metastasis.However,the role played by cortactin in laryngeal carcinoma has not been clearly delineated.The purpose of this experiment was to investigate the effect of silencing cortactin expression on the proliferation and invasion in the human laryngeal carcinoma cell line Hep-2.Methods:A plasmid from a siRNA targeting cortactin was constructed and transfected into a Hep-2 cell line.The siRNA interference efficiency of cortactin was determined by Western blot.The proliferation was measured by MTT assay and plate colony formation. The Transwell test was used to detect the migration and invasion ability of the Hep-2 cells.Empty plasmid-transfected Hep-2 and normal Hep-2 were used as control groups.Results:Compared to Hep-2 cells,the cortactin expression of pSilencer3.1-cortactin-siRNA/Hep-2 was 11.22%(P

Objective To detect the plasma level of tissue factor (TF) in non-small cell lung cancer (NSCLC) patients,and to discuss its association with hypercoagulation,venous thromboembolism and prognosis of lung cancer.Methods Sixty-one impatients in our hospital with confirmed lung cancer were enrolled as the study group.Thirteen patients with benign pulmonary diseases and 14 healthy volunteers were selected as the control groups.Bseline and follow-up clinical data were collected from participants.Enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of TF in plasma of all subjects.Results The levels of TF in plasma from NSCLC patients and participants with benign pulmonary diseases was significantly higher than that in healthy controls((550.88 ± 201.58) ng/L vs (510.77 ± 201.20) ng/L vs (178.34 ±66.73) ng/L,P ＜0.05).According to the plasma levels of TF,which have been detected in all subjects,the patients were divided into two groups:low level group (range from 103.73 ng/L to 476.22 ng/L) and high level group (range from 476.221 ng/L to 1003.00 ng/L).Statistical analysis showed that there was a positive correlation between plasma TF levels and TNM stages in NSCLC patients (P =0.026).Patient with metastasis had a higher plasma TF level than other patients (P =0.020).The log-rank test revealed that there was no significant difference in survival between the high level group and low level group (x2 =0.145,P =0.704).Multivariate Cox proportional hazards regression analysis indicated that plasma TF levels did not predicted for death(RR =1.001,95％CI0.998-1.004,P=0.452).Conclusion The plasma TF level in NSCLC patients was correlated with TNM stages;it had no significant relationship with hypercoagulation state and survival rate in NSCLC patients.Limitations should be aware of while evaluating the clinical course and prediction of prognosis of NSCLC patients using plasma TF levels.

[Objectives]To investigate the protective effects of recombinant Trichinella spiralis excretory-secretory 53ku pro-tein(rTsP53)on acute lung injuries in mice.[Methods]Thirty Balb/c mice were randomly divided into normal group. ALI group and rTsP53 group(n=10,respectively). Macrophages were harvested by bronchoalveolar lavage. Mortality in 72 hours was counted and compared. Pathological damage of lung tissues was observed by HE staining and graded by Smith score. Wet/dry ratio was measured. The bronchoalveolar lavage fluid concertration of IL-6 and IL-4 was measured by ELISA. The mRNA expression of TNF-α,iNOS, IL-10 and Arg-1 in alveolar lavage macrophages was detected by RT-PCR.[Results]72 h mortality of ALI mice was 70%,which was reduced to 30% in mice received rTsP53 treatment. Compared with ALI mice,the pathological damage of in rTsP53 treated-mice was improved and Smith score was declined ,combined with descending W/D ratio. IL-6 level of alveolar lavage fluid was elevated in ALI mice compared with normal group. And alveolar lavage macrophage was polarized to M2 sub-type,appeared as higher mRNA expression of TNF-α and iNOS and lower level of IL-10 and Arg-1. Bronchoalveolar lavage fluid concentration of IL-6 was declined and IL-4 was elevated in rTsP53-treated mice compared with ALI group. The macrophages of alveolar wash had higher mRNA expression of IL-10 and Arg-1,while lower level of TNF-α and iNOS,manifesting M2 polarization characteristics.[Conclusion]Recombinant T.spiralis P53 protein could protect mice from acute lung injuries induced by LPS via modulating M2 macrophage polarization,which play a role in depression of inflammatory reaction and tissue repairment.