Nuclear receptors,the superfamily of ligand-activated transcription factors,play crucial role in the regulation of gene expression of the lipid metabolism,and are involved in many metabolic diseases,such as cholesterol gallstone disease.Recently many domestic and foreign researches on the role of nuclear receptors in the lipid metabolism,help to further elucidate the biomolecular pathogenesis of cholesterol gallstone disease and other diseases associated with the lipid metabolism.

Objective To establish the evaluation methods of individual technology maturity based on SCI-covered papers and patent data using Gartner's Hype Cycle.Methods The SCI-covered papers and patent data were ana-lyzed by nonlinear regression analysis in combination with traditional X-radiography and photo-acoustic tomo-graphy, and represented as the bell-shaped curve and S-shaped curve for judging the technology maturity.Results The individual technology maturity was consistent with the qualitative review of experts.Conclusion The individual technology described in SCI-covered papers and patent data can be used in primary evaluation of its maturity.

Objective To examine whether electroacupuncture at the Wangu acupoint (GB 12 ) , whose position is similar to the cerebellar fastigial nucleus ,can reduce inflammatory cytokines in the hippocampus of rats with vascular dementia (VD) to provide theoretical evidence for treating VD with electroacupuncture .Methods Healthy Sprague‐Dawley rats ( n=54 ,300 -450 g) were randomly divided into three groups :sham surgery group ,VD group ,and electroacupuncture group .The ethologic scores of VD rats were evaluated and the mRNA expressions of inflammatory cytokines (TNF‐α,IL‐6 and IL‐1β) in the hippocampus were assessed and the hippocampal tissues were observed by hematoxylin‐eosin (HE) staining .Results Compared with VD group ,in electroacupuncture group the rats' learning ability improved significantly and the mRNA expressions of TNF‐α, IL‐6 and IL‐1β decreased . Simultaneously ,the damage extent of nerve cells in the hippocampal tissues decreased , and their morphology recovered to nearly normal .Conclusion Electroacupuncture at the Wangu acupoint can decrease the level of inflammatory cytokines in the hippocampus and reduce the damage extent of nerve cells in the hippocampus ,thus providing a new neuroprotective method for VD .

Background and purpose:Esophageal cancer is one of the common malignant tumors in our country. Anastomotic stenosis is a common complication after resection of esophageal cancer, seriously affecting the quality of life of patients after operation. By changing anastomosis, this study explored the methods for prevention of anastomotic stenosis after esophageal cancer surgery.Methods:Patients were randomly divided into groups. Patients admitted on odd dates were placed in the control group whereas patients admitted on even dates were placed in the experimental group. Patients in the control group were treated with gastroesophageal anastomosis using anastomat for gastroesophageal anastomosis. Anastomotic stomach was contracted by purse string suture at first, and then treated with stapler gastroesophageal anastomosis, before the gastroesophageal anastomosis was carried out on patients in the experimental group. After 6 months’ follow-up, the incidences of anastomotic stenosis between the two groups were compared.Results:The postoperative anastomotic stenosis rate in the control group was 19.2%, while that in the exper-imental group was 0%. There were statistically signiifcant differences between them (χ2=22.8,P<0.005). The incidence of anastomotic stenosis in the control group was signiifcantly higher than that in the experimental group.Conclusion:Anastomotic stomach contracted by purse string suture before stapler gastroesophageal anastomosis can effectively reduce the occurrence of anastomotic stenosis after esophageal cancer surgery.

ObjectiveTo evaluate the clinical efficacy of transumbilical single-port laparoscopic cholecystectomy in patients with acute cholecystitis and the effect of this surgical procedure on the postoperative recovery of gastrointestinal function. MethodsThis study enrolled 74 patients who were diagnosed with acute cholecystitis at Yanan University Affiliated Hospital, Shaanxi Province, China, from January 2013 to February 2014. The patients received either transumbilical laparoscopic surgery (treatment group) or conventional laparoscopic treatment (control group). Differences in operative time, intraoperative blood loss, rate of postoperative complications, time to first bowel sound, time to first flatus, time to ambulation, and hospital costs were compared between the two groups. Categorical data were compared using the χ2 test and continuous data were compared using the t test. ResultsNo significant difference was noted between the treatment group and the control group in terms of operative time (P＞0.05). However, the treatment group had significantly lower blood loss (10.5±1.5 L), rate of postoperative complications (10.8%), and hospital costs (8218±389 yuan) and significantly less time to first bowel sound (25±0.3 h), time to first flatus (1.6±4.1 h), and time to ambulation (9.7±5.8 h) than the control group (all P＜0.05). ConclusionTransumbilical single-port laparoscopic cholecystectomy is a safe and feasible procedure for the treatment of acute cholecystitis as it offers minimal trauma and fast recovery of gastrointestinal function after surgery, which warrants its greater use in clinical practice.

Fused teeth is defined as the union of enamel and dentin of two or more teeth germs,yielding a single tooth during tooth develop-ment.Their treatment is complex and usually need multidisciplinary approaches.This report presents a case of fused teeth treated by he-misection and discusses the clinical features and treatment options.

Objective To clone E-cadherin and N-cadherin promoters and insert them into a luciferase reporter gene vector, and to characterize the promoter activity of E-cadherin and N-cadherin.Methods E-cadherin and N-cadherin pro-moter were cloned into pGL 4-basic.The resulting plasmids were determined by DNA sequencing .The promoter activity was analyzed in breast cancer cell line ZR 75-1 and hepatocarcinoma cell line HepG 2.Results DNA sequencing showed that the sequences of the cloned promoter regions were correct .Analysis of the reporter gene activity indicated that the E-cad-herin and N-cadherin promoters had the highest transcriptional activity in ZR 75-1 and HepG2 cells.Conclusion The E-cadherin and N-cadherin promoter genes are cloned successfully , contributing much to screening transcription factors that regulate E-cadherin and N-cadherin expression .

Objective To investigate the difference of colon length between patients with intractable constipation and normal peo-ple.Methods 40 patients with intractable constipation and 35 cases of normal control group received air enema CT scan,post-pro-cessing techniques-curved planar reformation and volume rendering were used to measure the length of colon.Results Colon length of normal people and constipation patients were (1 230±33)mm and (1 605±47)mm,respectively.There was significant difference between normal people and constipation patients (t=163,P=0.015).Conclusion CT air enema technique can be used to measure the length of colon obj ectively for diagnosing and treating redundant colon.

Objectives To evaluate the efficacy and safety of single-incision versus conventional laparoscopic cholecystectomy.Methods We searched electronic databases (PubMed,EMBASE,Cochrane Library,Chinese Biomedicine databases) from January 2000 to April 2012.Personal contact with experts in the field of laparoscopic cholecystectomy was performed to identify further potentially relevant clinical trials.Randomized controlled trials conducted on single-incision versus conventional laparoscopic cholecystectomy were analysed to compare conversion rates,blood loss,operation time,postoperative complications,wound satisfaction score,postoperative pain score and postoperative duration of hospitalization.Data were extracted by two reviewers independently.Statistical analysis was performed by using the RevMan 5.1 software.Results Twelve studies involving 915 patients met the inclusion criteria.When compared with conventional laparoscopic cholecystectomy (LC),the singleincision laparoscopic cholecystectomy (SILC) group showed no significant difference in conversion rate (OR=0.70,95％CI: 0.13～3.77,P=0.68),postoperative complications (OR=1.13,95％CI:0.72～1.78,P＝0.59) and postoperative pain scores (WMD＝-0.18,95％CI:-0.78～-0.43,P=0.57) . There was a significant increase in operative blood loss (WMD ＝ 1.43,95 ％ CI: 0.09 ～2.78,P＜0.05),increase in operative time (WMD=16.79,95％CI: 9.05～24.52,P＜0.01),but an increase in wound satisfaction score (WMD=1.28,95％CI..1.09～1.47,P＜0.01).The postoperative duration of hospitalization was significantly shorter (WMD =-0.30,95％ CI:-0.58 ～-0.02,P＜0.05).Conclusions Current evidence suggests that there is no significant difference in conversion rate or postoperative complications between SILC and LC.Although SILC requires a longer operative time and there is more blood loss when compared with LC,the SILC is superior in wound satisfaction score and in duration of hospitalization.

ObjectiveTo investigate the distribution and expression of y-secretase subunit (APH-1)in the central nervous system (CNS) of APP/PS1 double transgenic Alzheimer's disease (AD) adult mouse model,and to detect the expression difference of APH-1 in developmental brain between AD model mouse and wild-type littermates in order to further clarify the relationship between APH-1 and AD. MethodsOffspring bred by APP/PS1 double transgenic AD mice were genotyped.Immunohistochemical staining was used to detect APH-1 distribution and expression in the CNS of adult APP/PS1 double transgenic AD mouse model,in the brain of AD model mouse and its wild-type littermates on postnatal day 1,7,21 and 120.Results APH-1 was widely expressed in almost all regions of the CNS,especially in the cerebral cortex,hippocampus,olfactory bulb,hypothalamus,ventral striatum,caudate putamen,raphe magnus nucleus,cerebellum,brainstem and spinal cord of the adult APP/PS1 double transgenic mice.APH-1 expression was higher in the cortex of both AD and wild type mouse on postnatal day 1 than on postnatal day 7 and 21 with increased level of APH-1 protein in adult mouse brain.APH-1 expression in the brain of AD mice was higher than in its wild type littermates at any stage(P＜0.05).Conclusions Distribution of APH-1 is ubiquitous and region-dependent in the CNS.The different distribution and expression between APP/PS1 double transgenic mouse model and its wild type littermate indicate that APH-1 may be related to AD.