Objective To investigate the influence of exogenous p53mut, p53wt and p16 on the expression of Smad4 in lung cancer H1299 cells. Methods Target genes (p53mut, p53wtand p16) were amplified by PCR and inserted into effective eukaryotic expression vector pIRES2-EGFP, respectively. These recombinant plasmids were transfected into H1299 cells by lipofectamine. The fluorescence microscope was employed to observe the transfected cells and the expression of EGFP. RT-PCR was used to validate the transfection efficiency. Western blot assay was used to detect the change of the Smad4 expression in H1299, Results Green fluorescence was observed under fluorescence microscope in the transfected H1299 cells at 72 hour post transfection. RT-PCR indicated that p53mut, p53wt and p16 genes were highly expressed in H1299 cell. There was no significant difference in Samd4 expression between the empty plasmid group and control group(P＞0.05). But the expression of Samd4 in p53mut transfected group was decreased(P＜0.05). On the contrary, the expression of Smad4 was increased in the p53wt transfected group and P53wt and p16 co-transfected group. Moreover, the increase was more obvious in the P53wt and p16 cotransfected group(P＜ 0.05). Conclusion P53mut gene transfection reduces the expression of Smad4 and P53wt. The co-infection of p53mut and p16 increases the expression of Smad4 in the H1299 cells. The tumor promoting effect of p53mut and the antitumor effect of p53^ and p16 may be related to the signal pathway of TGF-β/Smad4.

Objective To investigate the safety and efficiency of multiple-discipline cooperated diagnosis and treatment on esophageal foreign body and to discover the risk factors of patients who need surgical treatment compared with medical treatment.Methods The information of 108 patients who was diagnosed with esophageal foreign body from January 2014 to June 2021 and accepted multiple-discipline cooperated diagnosis and treatment consisted of cardiothoracic surgery department,digestive system department,emergency department,imaging department and anesthesiology department was collected.Then,we compared the difference of clinic time,foreign body type,endoscopic findings,position of incarnation,complications,postoperative hospital stay between surgical treatment and medical treatment.Results Patients in medical treatment were older than surgical treatment[(59.21±13.12)years VS.(52.65±12.66)years,P＜0.05].Clinic time shew a skewed distribution,clinic time was longer in surgical treatment compared with medical treatment by rank sum test(P＜0.05).There were statistical differences in foreign body type,esophageal injury and complications between the two groups(P＜0.05).The white blood cell count of endoscopic treatment group and surgical treatment group was(7.89±3.08)× 109/L and(11.69±6.98)× 109/L,respectively(P＜0.05),neutrophil counts were(6.16±2.96)× 109/L and(9.97±6.97)× 109/L,respectively(P＜0.05),proportion of neutrophils were(76.11± 8.75)％ and(81.52±12.52)％,respectively(P＜0.05),and C-reactive protein level were(43.26± 56.87)mg/L and(111.37±102.86)mg/L,respectively(P＜0.05).Conclusion Multiple-discipline cooperated diagnosis and treatment is safe,rapid and effective in the diagnosis and treatment of esophageal foreign bodies.Patients with longer clinic time,higher white blood cell counts,higher neutrophil counts,higher proportion of neutrophils,and higher C-reactive protein level were more likely to require surgical treatment.