Objective To investigate the value and safety of colonoscopy in patients aged 80 years and over.Methods Clinical and endoscopic data of 1 249 patients aged 80 years and over collected from December 2005 to December 2015 at PLA army General Hospital were analyzed retrospectively.Results The average age was 83.03 years.Reasons for receiving colonoscopy included constipation with abdominal distension(19.38 ％)and hematochezia(10.57％).The completion rate of colonoscopy for the entire length was 94.50 ％.There were no abnormal findings in 492 cases (39.39 ％).Colonic polyps (31.62 ％) and colorectal cancer (14.25 ％) were among the major lesions detected with colonoscopy.Colorectal neoplasms were found in 58.33％ of the 132 patients with hematochezia.The total complication rate from colonoscopy and treatment was 0.72％,with the complication rate from treatment at 1.32％.Conclusions Constipation with abdominal distension and hematoehezia are the main reasons for undergoing colonoscopy for very elderly patients.Colon polyps and colorectal cancer are common disorders in elderly patients over 80 years of age and people with hematochezia in this age group are at high risk of having colorectal cancer.Colonoscopy is a safe and effective procedure and an important examination method for very elderly patients with hematochezia.

AIM: To investigate the effect of probucol on proliferation of rat vascular smooth muscle cells(VSMC) stimulated by basic fibroblast growth factor (bFGF) and/or hydrogen peroxide(H 2O 2). METHODS: Effects of probucol on VSMC proliferation and DNA synthesis stimulated by bFGF and/or H 2O 2 were observed by means of MTT test, cell number count and [ 3H]-TdR incorporation. RESULTS: ①Probucol significantly inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, with dosage-dependent manner. Cell number, A value and [ 3H]-TdR incorporation in group probucol+bFGF and group probucol+H 2O 2 were reduced by 40.0%, 39.1%, 45 5% and 46 9%, 45 0%, 39 5%, respectively, compared with group bFGF and group H 2O 2 ( P 0.05). CONCLUSION: Probucol dramatically inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, but had no inhibitory effect on the cell proliferation prestimulated by bFGF and /or H 2O 2. [

Objective To evaluate the efficacy of L?Arabinose for bowel preparation before colonos?copy. Methods A total of 170 patients who underwent colonoscopy were randomized into 2 groups. The ex?perimental group (n=85) used L?Arabinose for bowel preparation, while the control group (n=85) used polyethylene glycol electrolyte solution ( PEG?ELS ) . The degree of comfort, adverse effects, and the visibility during colonoscopy were observed. Results Premedication of L?Arabinose for bowel preparation yielded to more comfort ( U=-4?349,P=0?000) , less adverse effects (χ2=29?27,P=0?000) , and similar visibility during colonoscopy ( U=-0?875,P=0?381) compared with PEG?ELS. Conclusion L?Arabinose is safe, comfortable, and effective for bowel preparation before colonoscopy.

Objective To evaluate the efficacy of premedication of pronase and simethicone before upper gastrointestinal endoscopy. Methods A total of 4 690 patients undergoing upper gastrointestinal en?doscopy from January 2014 to November 2014 were recruited at gastrointestinal endoscopy center in Beijing Military General Hospital. All patients were randomized into 3 groups. The pronase plus simethicone group( n=1 602) took 40 ml mixed solution of pronase, sodium bicarbonate and simethicone orally 20 minutes before endoscopy. The simethicone group( n=1 548) took 40 ml simethicone orally 20 minutes before endoscopy. And the control group( n=1 540) took 10 ml lidocaine hydrochloride mucilage orally 5 minutes before endos?copy. The visibility during gastroscopy was observed. Results Each patient underwent gastroscopy, and no severe adverse event occurred during the procedure. The visibility of 82?3%( n=1 318) of the pronase plus simethicone group, 67?7%( n=1 048) of the simethicone group and 28?1% patients( n=432) of the control group respectively reached grade A or B. The visibility during gastroscopy in the pronase plus simethicone group was higher than that in the simethicone group(χ2=89?42, P=0?000) , while that in the simethicone group was higher than that of the control group(χ2=486?30, P=0?000). Conclusion Premedication of pronase and simethicone can improve the visibility during gastroscopy.

Objective To analyze the miss rates of colorectal adenomas during colonoscopy as well as risk factors influencing the adenoma miss rates and to take corresponding measures. Methods A total of 432 patients who underwent index and follow-up colonoscopy in 18 months were randomized and investigated. The results of two colonoscopies were compared and the missed adenomas were defined as the adenomas de-tected only during the second colonoscopy. Miss rates were calculated according to patient-based methods. Chi-square test was used to analyze the relative factors influencing the adenoma miss rate of per-patient. Then the meaningful factors were chosen into the logistic regression model for multiple factors analysis. Results Of 432 patients,116(26. 9%)had missed adenomas on first colonoscopy. Single factor analysis found that the size of adenoma( χ2 = 89. 686,P = 0. 000),the shape of adenoma( χ2 = 68. 488,P = 0. 000),the location of adenoma(χ2 = 77. 055,P = 0. 000)and adenoma tissue types(χ2 = 417. 000,P = 0. 000)were the risk factors for miss rates of colorectal adenomas. Number of polyps(χ2 = 8. 450,P= 0. 038),the organi-zation type of polyp(χ2 = 10. 718,P= 0. 013)and proficiency of colonoscopists(χ2 = 56. 069,P= 0. 000), the quality of bowel preparation(χ2 = 39. 195,P = 0. 000),insertion time(χ2 = 13. 133,P = 0. 001)were also the risk factors for miss rates of colorectal adenomas. Logistic regression analysis showed that the bigger the adenoma size,the less missed adenomas(OR= 0. 341,95%CI:0. 173-0. 671). Also,the longer insertion time took,the lower the adenoma miss rate(OR = 0. 987,95% CI:0. 981-0. 994). Per-patient miss rates were lower for high-risk adenomas compared with low-risk adenomas(OR = 0. 324,95%CI:0. 154-0. 680). Adenomas happening in multiple parts of bowel easily leads to missing(OR= 3. 791,95%CI:1. 505-9. 546). Conclusion The missed diagnosis of adenomas is not only significantly associated with features of missed adenomas,but also with skills of colonoscopists,insertion time,and bowel preparation. The key is high-quality index colonoscopy to avoid adenomas missing.

Objective To observe the effects of MSH2 gene re expression on estrogen-induced apoptosis of colon cancer cells LOVO,and to explore its mechanisms.Methods According to different plasmid and whether with estradiol intervention,colon cancer LOVO cells were divided into empty plasmid with ethanol group,empty plasmid with estradiol group,MSH2 with ethanol group,MSH2 with estradiol group,estrogen receptor (ER) β with ethanol group,ERβ with estradiol group,ERβ with MSH2 and ethanol group and ERβ with MSH2 and estradiol group,and received corresponding treatment.The expression of MSH2,ERβ protein and apoptosis related caspase 3 protein were detected by Western blotting.Cell viability was measured by cell counting kit-8.Cell DNA fragments of each group were isolated with apoptosis DNA fragments isolation kit.And the DNA ladder was observed.The rate of apoptosis was detected by flow cytometer.Single factor variance analysis was performed for comparison among multiple groups,and t test was used for comparison between the two groups.Results After transfection,the expression of the MSH2 and ERβ at protein level in LOVO cells significantly increased and neither of their expression was effected by estradiol.The expression levels of caspase 3 cleavaged active fragments of ERβ with estradiol group and ERβ with MSH2 and ethanol group were higher than other groups,and there was no significant difference between these two groups.The LOVO cell viability of empty plasmid with ethanol group,empty plasmid with estradiol group,MSH2 with ethanol group,MSH2 with estradiol group,ERβ with ethanol group,ERβ with estradiol group,ERβ with MSH2 and ethanol group and ERβ with MSH2 and estradiol group was 1.72 ±0.25,1.74 ± 0.31,1.77 ± 0.35,1.74±0.33,1.70±0.34,1.02±0.48,1.71±0.31 and 1.07±0.18,respectively,and the differences between the groups were statistically significant (F=3.791,P＜0.05).Among them,the LOVO cell viability of ERβ with estradiol group was lower than that of ERβ with ethanol group,accordingly,that of ERβ with MSH2 and estradiol group was lower than that of ERβ with MSH2 and ethanol group,that of ERβ with estradiol group was lower than that of empty plasmid with estradiol group,that of ERβ with MSH2 and estradiol group was lower than that of MSH2 with estradiol group,and the differences were statistically significant (t=3.158,3.075,3.648,3.253,all P＜0.05).DNA ladder formed from DNA fragments of apoptosis cells was seen in ERβ with estradiol group and ERβ with MSH2 and estradiol group.The apoptosis rate of empty plasmid with ethanol group,empty plasmid with estradiol group,MSH2 with ethanol group,MSH2 with estradiol group,ERβ with ethanol group,ERβ with estradiol group,ERβ with MSH2 and ethanol group and ERβ with MSH2 and estradiol group was 7.86±0.19,7.87±0.39,8.39±1.02,9.05±1.54,7.54±0.99,19.77±2.35,7.76±1.32 and 19.30±1.75,respectively,and the differences between groups were statistically significant (F=45.436,P＜0.05).Among them,the apoptosis rate of ERβ with ethanol group was lower than that of ERβ with estradiol group,that of ERβ with MSH2 and ethanol group was lower than that of ERβ with MSH2 and estradiol group,that of empty plasmid with estradiol group was lower than that of ERβ with estradiol group,that of ERβ with MSH2 and estradiol group was lower than that of MSH2 with estradiol group,and the differences were statistically significant (t =8.260,9.133,8.596,7.617,all P＜ 0.05).Conclusions Estrogen may promote colon cancer cell apoptosis through ERβ pathway.The process of apoptosis maybe related with caspase protein,MSH2 may not be involved in the regulation of this signal pathway.

Objective To investigate the endoscopic findings and treatment of gastrointestinal neu-roendocrine neoplasms.Methods Endoscopic manifestation and treatment were analyzed retrospectively in 72 patients who were diagnosed as having gastrointestinal neuroendocrine neoplasms by endoscopy and pathol-ogy from May 2011 to December 2014.Results In 72 patients of gastrointestinal NEN,rectum was most commonly involved (48 patients,66.7%),followed by the stomach (16 patients,22.2%),duodenum, esophagus and the ileocecal valve.There were certain features in rectal neuroendocrine neoplasms under endoscopy,mostly manifested by submucosal tumors.But gastric,esophageal,and small intestine NEN man-ifestations showed various forms,without specific typical features,and easy to be misdiagnosed.Some patients diagnosed as having NEN G1 or G2 underwent EMR,ESD or laparoscopy combined with endoscopy resection.Patients diagnosed as having NEN G2 or neuroendocrine carcinoma by pathology received surgical resection,chemotherapy or palliative treatment.All 50 patients underwent endoscopic treatment successful-ly.Perforation occurred in one duodenal bulbar G1 patient during ESD.No bleeding occurred during and after the operation.All patients after treatment were followed up for 15.6 +13.2 months on average with no recurrence or metastasis.Conclusion Manifestations of gastrointestinal neuroendocrine neoplasms vary under endoscopy.Some tumors that locate in mucosa or submucosa with diameter less than 1cm can be resec-ted through EMR or ESD.

Objective To analyze and compare the differences in application of 24-hour dietary recall and dietary balance index (DBI) in dietary survey and evaluation of patients with type 2 diabetes mellitus,meanwhile investigate their nutrition status.Method This was a cross-sectional study.A total of 100 type 2 diabetes inpatients at the age of 19-59 were recruited from Shanghai Jiaotong University Affiliated Sixth People's Hospital from December 2013 to February 2014.They were surveyed and evaluated by 24-hour dietary recall and DBI respectively.Result The micronutrient intake in patients with type 2 diabetes was not sufficient.Compared with RNI,the intake of vitamin B1,B2,and calcium was less than 50％.The average of DBI lower bound score (DBI-LBS) of the 100 patients was 32.1±6.1,65％; the patients were in moderate or severe deficit of food intake.DBI higher bound score (DBI-HBS) was 4.4±2.8.No significant excess intake problem was found.Dietary quality distance was 36.4±6.9.Eighty-seven percent of them had a dietary patterns of mode B.Conclusion Dietary patterns in type 2 diabetes patients were not reasonable.Nutrition education and nutrition intervention for type 2 diabetes should be emphasized.The two methods can be used to evaluate dietary quality independently,but it would be better to evaluate the quality of the patients' diet using two dietary survey methods together.

Objective: To investigate the clinical symptom improvement time of the children with non-diarrhea-related hemolytic uremic syndrome (HUS) treated with glucocorticoids, and to evaluate its efficacy. Methods: A total of 22 children with non-diarrhea-related HUS were selected as the subjects. According to whether glucocorticoid was used in combination of plasma in the actue stage of the children, the children were divided into simple plasma group (n=ll) and plasma combined with glucocorticoid treatment group (n=ll). The average hospital stays, the time of hematuria, the time of platelets and serum creatinine to recover to the normal levels of the children in two groups were analyzed. The clinical material of children in two groups after hospital discharge were collected, and the prognosis of the children in two groups was evaluated according to the follow-up results. Results: Compared with simple plasma group, the average hospital stays, and the time of hematuria and the time of serum creatinine to recover to the normal level of the children in plasma combined with glucocorticoid treatment group were shortened, but there were no significant differences (P>0. 05). The time of platelets rising to the normal level was similar had no significant difference between two groups (P>0.05). Ten cases completed the follow-up in simple plasma group; one children suffered hypertension during follow-up, and one case replapsed 1 year after operation. In plasma combined with glucocorticoid treatment group, nine cases completed the follow-up; one children persistented urinalysis abnormalities and hearing loss, with the growth and development being slower than their peers; the remaining children all achieved the clinical cure standards. The clinical cure rate of the chidren in plasma combined with glucocorticoid treatment group was 88. 9%, while it was 80. 0% in simple plasma group; there was no significant difference in the clinical cure rate between two groups (P> 0.05). Conclusion: Using glucocorticoids in the acute stage of non-diarrhea-related hemolytic uremic syndrome in the children could not shorten the acute course and improve the prognosis of the children.

Objective To evaluate the clinical efficacy of pre-procedure simethicone on detection of pharynx by upper gastrointestinal endoscopy. Methods A total of 100 patients with esophageal squamous cell carcinomas ( ESCCs) were enrolled in this prospective controlled trial and randomly assigned into two groups. The study group was given gargle with 5 mL simethicone plus 5 mL water combined with conventional procedure before gastroscopy. The control group was prepared according to the conventional procedure. The age, gender, tumor stage, lesion size, doctor＇s satisfaction and examination time between two groups were analyzed. Results The basic conditions between the two groups, including age, gender, and tumor stage were not significantly different (all P＞0. 05). The detection rate of superficial lesion in pharynx was higher in the study group than that in the control group, with no significant difference [8. 16%(4/49) VS 2. 04%( 1/49), P＝0. 362]. The median time of pharyngeal observation in the study group was less than that in the control group (21. 7 s VS 33. 9 s, P＝0. 000). The doctor was more satisfied in the study group than the control group (P＝0. 001). Conclusion Pre-procedure with simethicone improves the endoscopic visibility and detection rate of superficial squamous cell carcinoma with less observation time.