Objective To study the effects of arsenic trioxide ( As2 O3 ) on inhibiting the proliferation of pancreatic carcinoma cell lines. Methods The inhibiting rate of As2O3 and Fluorouracin(5-Fu) ,Gemcitabine(GEM) on pancreatic carcinoma cell lines PC-3 were detected by using CCK-8 assay. Results As compared with 5-Fu、GEM,the inhibiting rate of As2O3 was the highest one( P ＜ 0.01 or P ＜ 0.05). Conclusion As2O3 can inhibit pancreatic carcinoma cell lines PC-3 effectively in vitro. The effects of As2O3 on inhibiting the proliferation of pancreatic carcinoma cell lines was stronger than 5-Fu and GEM. This is possibly due to the extensive and unique anticancer mechanism of As2O3.

Objective To investigate clinical effects of early postoperative oral enteral nutrition on immune function for colorectal cancer patients,to provide a reference for clinical treatment.Methods We selected 90 colorec-tal cancer surgery patients from January 2012 to April 2015,and they were divided into two groups by random number method.50 cases in the study group were given early oral enteral nutrition,and 40 patients in the control group were given postoperative parenteral nutrition.Before and after treatment,the quality of life,complications,immunology indi-cators,nutrition indicators were compared in two groups.Results In the observation group,the postoperative fever, exhaust time,hospital stay,hospital costs,quality of life scores were (54.29 ±5.76)h,(57.89 ±5.95)h,(10.48 ± 1.63)d,(41 432.85 ±2 165.46)RMB,(79.23 ±5.17)points,which were significantly lower than those in the con-trol group,the differences were statistically significant (t =8.69,P =0.00;t =8.61,P =0.00;t =9.49,P =0.00;t =5.54,P =0.00;t =4.16,P =0.01);7d after the treatment,the IgA,IgG,IgM,CD +4 ,CD +4 /CD +8 in observation group were (1.92 ±0.49)g/L,(11.31 ±2.24)g/L,(0.99 ±0.21)g/L,(41.21 ±5.51)%,(1.72 ±0.32),which were better than those in the control group,the differences were statistically significant (t =2.05,P =0.04;t =2.11, P =0.04;t =2.12,P =0.04;t =3.64,P =0.01;t =2.23,P =0.03).In observation group,postoperative 7d Hb, TRF,ALB,PAB were (113.28 ±13.36)g/L,(3.02 ±0.39)mg/L,(38.97 ±3.15)g/L,(333.15 ±18.35)mg/L, which were better than those in the control group,the differences were statistically significant (t =3.45,P =0.01;t =2.18,P =0.03;t =2.32,P =0.04;t =3.21,P =0.01).7d after operation,the CRP level of observation group was(7.29 ±2.05)mg/L,which was significantly lower than that of the control group,the difference was statistically sig-nificant (t =4.22,P =0.01 ).The incidence rate of postoperative complications in the observation group was 26.00%,that of the control group was 40.00%,the difference was statistically significant (χ2 =4.52,P =0.01). Conclusion Early oral enteral nutrition in patients with colorectal cancer will help to improve immune function, nutritional support,reduce the inflammatory response,which will help postoperative recovery.