Objective To study the expression of HDAC2 in lung of smoke cessation and smoking cessation rats,Methods Forty SD rats were divided into five groups randomly:normal control group (group A),1-month smoking group (group B,),2-month smoking group (group C),1-month smokingcessation group(group D),2-month smoking-cessation group(group E).Group B rats were exposured to cigarettes for 1 month,C,D,E were exposured to cigarettes for 2 months.At 1 month,group B were sacrificed,at 2 month,group C were sacrificed,group D was smoking cessation for 1 month and group E for 2 months.Pathomorphological changes of the small airway were analyzed,and then study the HDAC2 in rats'lung tissue.Results Compared with group A,the levels of HDAC2 in group B,group C,group D,group E were decreased (P ＜ 0.01),but smoking groups levels were lower than smoking-cessation groups.In smoking groups,group C was lower than group B.In smoking-cessation groups,group D was lower than group E.Conclusion It shows that the levels of HDAC2 in rats' lung tissue decrease after smoking exposure.It can recrease after quitting,but still cant back to normal.

Objective To study the expression of clusterin (CLU) and P-glycoprotein (P-gp) in hepatic cell carcinoma (HCC) and its relationship.Methods The expression of CLU gene in the tissue of H CC (41 cases),cirrhosis(10 cases) and normal liver (10 cases) and the expression of P-gp in the tissue of HCC were detected by immunohistochemical method.Results The positive expression rate of CLU was 82.93％(34/41) in HCC,and negative or weak positive were detected in cirrhosis and normal liver tissue.The positive expression rate of CLU was significantly correlated with Edmondson's histological grade (P ＜ 0.05),but had no correlation with patients' age,sex and cirrhosis (P ＞ 0.05).The positive expression rate of P-gp in HCC was 70.73％(29/41).There was significant correlation between the expression of CLU and P-gp (P ＜ 0.05).Conclusions The over expression of CLU is significantly associated with clinical multidrug resistance in HCC.It should be a potential target for treatment of HCC.

Objective To elucidate the transmission dynamic and epidemic trend of bancroftian filariasis occurred under the condition with no control measure taken 5 years after elimination of filariasis.Methods A 10-year longitudinal observation (from 1984 to 1994) was made in Huayuan Village in Shengli Township of Tancheng County, which used to be a high bancroftian filariasis-endemic area in southern part of Shandong Province.Results The microfilarial rate decreased from 0.56% before the study to 0.12% after the study and 8 out of the 9 previous microfilaria-positive cases became negative gradually. During the study period, 6 new microfilaremia cases were detected, 5 of which became negative naturally within 3 to 4 years. Eighty-eight point eight nine per cent of the detected patients with microfilaremia converted into IgG4-negative after 10 years. The natural infective rate of vectors decreased year by year and became zero by the tenth year of the study, the annual transmission potency decreased also from 3.47 to zero by the tenth year.Conclusions It showed that under the local natural environment the biting rate representing the vector density which was obtained by capture method was from 24.1 to 52.5 person/night among the residents who did not use mosquito nets,and 13.5 to 21 person/night among the residents who used mosquito nets. The microfilarial rate of 0.56% in population with the average microfilarial density of 6.6 to 20.7 capita/60 μl ear blood of residual microfilaria-positive patients might be considered as the terminal threshold of transmission.

Objective To investigate the causes, diagnosis, treatment and prognosis of misdiagnosing metastatic liver cancer as liver abscess. Methods Clinical data of 4 patients with metastatic liver cancer misdiagnosed as liver abscess in Department of General Surgery, the Third Hospital of Shenzhen from April 2012 to April 2013 were retrospectively analyzed. The informed consents of all patients were obtained and the ethics committee approval was received. There were 1 male and 3 females with age ranging from 44 to 67 years old and a median age of 54 years old. All the patients received tests such as blood routine, liver function, alpha fetoprotein (AFP), carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA 19-9) and so on, and examinations of hepatobiliary ultrasonography, computed tomography (CT) scan of the upper abdomen, gastroscope and colonoscope after admission to hospital. Results The mean temperature of patients was (37.8±0.8)℃when admitted in hospital. Two cases got fever and shivering, and 4 cases suffered upper abdominal pain or discomfort. There were 2 cases with increasing white blood cell (WBC) and increasing alkaline phosphatase (ALP), 3 cases with increasing CA19-9, 2 cases with increasing CEA and 1 case with increasing AFP. By ultrasound examination and CT , multiple lesions were observed in 3 cases and single lesion in 1 case, including 2 cases of cystic lesions. Obvious edge enhancement was found in 3 cases by CT scan, heterogeneous internal enhancement in 2 cases, no internal enhancement in 2 cases, and 3 cases were found with lymphadenectasis in the porta hepatis or retroperitoneum. By pathological examination, 2 cases were diagnosed with liver metastasis of colon cancer, 1 case with liver metastasis of gastric cancer. And 1 case was clinically diagnosed with liver metastasis of gastrointestinal tract or extrahepatic bile duct cancer. Two cases received anti-infection treatment after admission to hospital. One case received liver tumor biopsy+catheter drainage of liqueifed necrotic tissues, and 1 case received colon cancer resection for intestinal obstruction. All the 4 patients received chemotherapy. One case died of multiple organ failure 3 months after being diagnosed and 1 case who had undergone colon cancer resection still received chemotherapy and lived well till the date of paper submission. The other 2 cases were in poor condition. Conclusions Some patients with metastatic liver cancer are usually misdiagnosed as liver abscess because of the untypical clinical features. The tumor marker detection is helpful for the differential diagnosis. Comprehensive treatments with the main of surgical resection should be employed in the patients but the prognosis is poor.

Objective To investigate the causes and treatments of severe complications after laparoscopic surgery. Methods Clinical data of 7 cases with severe complications after laparoscopic surgery in the Third People’s Hospital of Shenzhen from January 2008 to January 2013 were analyzed retrospectively. The informed consents of all patients were obtained and local ethical committee approval had been received. There were 3 males and 4 females with the age ranging from 6 to 67 years old and median of 40 years old. The diagnosis, treatments clinical data of the patients were collected, and the causes, treatments and prevention measures of the complications were summarized. Results Five cases underwent laparoscopic cholesystectomy (LC), 4 of which suffered bile duct injury for severe abdominal adhesion and unclear anatomy of the Calot triangle and 1 case suffered strangulated intestinal obstruction after operation because the hepatic falciform ligament was ruptured when puncturing below the xiphoid. One case underwent laparoscopic high ligation of hernial sac for indirect inguinal hernia and suffered strangulated intestinal obstruction after operation because part of the small intestine ran out of the peritoneum through the port site below the umbilicus. One case underwent laparoscopic tension-free repair for indirect inguinal hernia and suffered ischemic necrosis of the left testis possibly because of testicular torsion when stretching the tissue. The 4 cases with bile duct injury received primary drainage, 3 of which underwent secondary Roux-en-Y cholangiojejunostomy for severe biliary stricture and all recovered well after operation, and the other case underwent endoscopic biliary stent implantation 3 months after operation. The 2 cases with strangulated intestinal obstruction underwent emergent partial resection and end-to-end anastomosis of small intestine and recovered well after operation. The case with necrosis of testis underwent testicular excision. Conclusions The main causes of severe complications after laparoscopic surgery probably are the unclear local anatomy and failing to convert surgical procedure timely, etc. Early diagnosis, comprehensive evaluation and proper surgical interventions are the important measures for improving the prognosis of these patients.