Objective To investigate the effects of recombinant adenovirus-mediated co-transfection of carcinoembryonic antigen (CEA) gene and erythropoietin (EPO) gene on promoting hematopoietic stem cells directly producing erythrocyte vaccine against colon cancer. Methods The expression adenovirus vectors carrying CEA and EPO or green fluorescent protein (GFP) gene were constructed respectively, and recombinant adenovirus carrying CEA, EPO or GFP were packaged and produced respectively. The bone marrow-derived mesenchymal stem cells (MSCs) of mice were isolated and cultured in vitro by anti-CD117 magnetic bead separation, and were transfected with CEA (CEA group), EPO (EPO group) or GFP (blank vector group), co-transfected with CEA and EPO (CEA-EPO group). The expressionsof CEA and EPO gene and its protein after transfection in supernatant fluid of culture were detected by realtime-PCR and Western blot method in each group. We had checked and obtained the vaccine with co-transfection of CEA gene and EPO gene by cell red line marker antibody CD71 and GPA, then we carried on experiments with the vaccine in vitro and in vivo. There were 4 groups in our trail: blank vector group, CEA group, EPO group, and CEA-EPO group. Results We had successfully gathered the hematopoietic stem cells, flow cytometry analysis result showed that there were significant differences before and after purification for positive selected samples (P<0.05). The expressions of double genes (CEA-EPO gene) and protein showed CEA-EPO gene were successfully transfected into the hematopoietic stem cells. We had confirmed erythrocyte vaccine with co-transfection of CEA and EPO gene by antibody CD71 and GPA with flow cytometry. The monocytes cytotoxicity on colon cancer cell line CT26 showed that lysis of target cells of CEA-EPO group were higher than those of other 3 groups when in proportion of 40∶1 (P<0.05). In the experimentation of neoplasma format, the volume of tumor and mortality were smaller or lower, but survival time was longer of CEA-EPO group in2 weeks after treatment (P<0.05). Conclusions The erythrocyte vaccine with co-transfection of CEA gene and EPO gene has efficient anti-tumor effects on colon cancer. Not only can promote hematopoietic stem cell directly producing erythrocyte vaccine, but also can produce tumor antigen vaccine against colon cancer.
The results of 2389 patients exmained by colonofiverscope in past nine years are reported. Polyps were found in 561 cases, including 1256 polyps in the large intestine and 82 polyps in the terminal ileum. All 1299 polyps were removed with biopsy forceps. Pathology demonstrated that there were 406 adenomas, including 89 atypical hyperplasia and 23 cases with malignant change and 932 non-canerous polyps with 102 atypical hyperplasia. Since adenoma is seen to be a precancerous change, the polypectomy by colonofiberscope , ecpecially atypical hyperplastic polyps may decrease morbidity of large intestinal cancer. Cancer associated with adenoma may be as high as 51.28%, so the recrudescence of polyps may possibly be found even afer the cancer removal. These data showed that an early discovery of small malignant adenoma is key to improve efficiency.
ObjectiveTo systematically review the effects of chewing gun on the promotion of intestinal function recovery after colorectal cancer surgery. MethodsWe searched PubMed, The Cochrane Library, CBM and CNKI databases from their inception to December 2014, to collect randomized controlled trials (RCTs) assessing chewing gun in patients after colorectal cancer surgery. References of included studies were also retrieved. Two reviewers independently screened studies according to inclusion and exclusion criteria, extracted data, and assessed the methodological quality of included studies. Then meta-analysis was performed using RevMan 5.2 software. ResultsNine RCTs involved 686 patients were included. The results of meta-analysis indicated that, compared with the control group, chewing gun could significantly reduce the time to first passage of flatus (MD=-17.33, 95%CI -23.96 to -10.70, P<0.000 01), the time to the first defecation (MD=-22.25, 95%CI -36.45 to -8.05, P=0.002) and postoperative hospital stay (MD=-1.37, 95%CI -2.25 to -0.49, P=0.002) after colorectal cancer surgery, and could also reduce the intestinal obstruction caused by intestinal paralysis (OR=0.33, 95%CI 0.14 to 0.77, P=0.01). However, no significant difference in the incidence of nausea and vomiting was found. ConclusionEarly chewing gum can promote the recovery of gastrointestinal function in patients after colorectal cancer operation.
ObjectiveTo compare the efficacy of totally transanal endorectal pull-through and laparoscopic assistance endorectal pull-through in the treatment of Hirschsprung’s disease (HD).MethodsPubMed, EMBASE, The Cochrane Library, CNKI, Wanfang, and VIP Database were searched to screen out the comparative studies published between January 1998 and May 2020 on the treatment of HD with totally transanal endorectal pull-through and laparoscopic assistance endorectal pull-through. Then two reviewers independently completed the literatures screening, data extraction, and quality evaluation. The Review Manager 5.3 software was used to combine the effect size of the postoperative effect indicators included in the literatures. Stata 14.0 software was used to perform Begg’s and Egger’s tests on the publication bias of the included literatures.ResultsA total of 8 clinical studies conforming to the standards were included and 702 cases of children undergoing HD radical resection were recorded, including 335 cases in the totally transanal endorectal pull-through group and 367 cases in the laparoscopic assistance endorectal pull-through group. Compared with the laparoscopic assistance endorectal pull-through group, the totally transanal endorectal pull-through group had an advantage in the incidence of postoperative faecal incontinence/soiling [OR=0.20, 95%CI was (0.07, 0.54), P=0.001], and the postoperative constipation recurrence rate was higher than the laparoscopic assistance endorectal pull-through group [OR=2.39, 95%CI was (1.05, 5.42), P=0.04]. There were no statistically significant differences between the two groups in terms of postoperative enterocolitis [OR=1.01, 95%CI was (0.59, 1.75), P=0.96], postoperative adhesion intestinal obstruction [OR=0.74, 95%CI was (0.28, 1.95), P=0.54], and postoperative anastomotic stenosis [OR=1.14, 95%CI was (0.51, 2.56), P=0.74].ConclusionsCompared with laparoscopic assistance endorectal pull-through, the totally transanal endorectal pull-through can reduce the incidence of postoperative faecal incontinence/soiling, but the rate of recurrence of postoperative constipation is higher. The two surgical procedures for HD have similar incidences of postoperative enterocolitis, anastomotic stenosis, and adhesive intestinal obstruction.
Objective To investigate the surgical techniques for management of left colon carcinoma obstruction. MethodsThe techniques used in left colon carcinoma obstruction and the corresponding efficiencies reported in foreign literatures were reviewed. ResultsThe surgical techniques for management of left colon carcinoma obstruction involve palliative operation, staged operation and onestage operation. These methods had their own virtues as well as shortages. But on all accounts, onestage operation was favorable for both the patients and docters. ConclusionDifferent methods for management of left colon carcinoma obstruction have different adaptation index, first you must ensure safety, then you should try your best to do onestage operation.