Objective·To compare the efficacy of video-assisted thoracic surgery (VATS) and conventional lung volume reduction surgery for the treatment of patients with severe chronic obstructive pulmonary disease with a meta-analysis.Methods·Randomized controlled trials (RCT) and non-randomized control studies of VATS (the VATS group) and conventional lung volume reduction surgery (the thoracotomy group) for treating patients with severe chronic obstructive pulmonary disease were collected from databases,including Web of Science,EMbase,PubMed,the Cochrane Library,CNKI,CBM disc,WanFang Data,and VIP.The latest literature was published in November 2016.The assessment included the quality of literature and RevMan5.3 software was used to perform the meta-analysis.Results·Of 779 retrieved articles,12 studies involving 966 patients were included according to the inclusion criteria.The results of meta-analysis showed that the operation time of bilateral LVRS was longer in the VATS group than in the thoracotomy group,but the difference in the operation time of single LVRS between the two groups was not statistically significant.The difference in the duration of chest tube drainage for bilateral LVRS between the two groups was not statistically significant,while the duration of chest tube drainage for single LVRS was significantly shorter in the VATS group than in the thoracotomy group.The amount of intraoperative blood loss postoperative drainage was significantly smaller in the VATS group than in the thoraeotomy group.Postoperative pulmonary function and blood gas analysis showed that the 6 min walking distance was longer in the VATS group than in the thoracotomy group.The differences in FEV1 and PaO2 between the two groups were not statistically significant,as well as the difference in postoperative complications between the two groups.Conclusion·Comparing to conventional lung volume reduction surgery,Video-Assisted thoracic lung volume reduction surgery is a better choice.However,randomized control trials with higher quality and larger scale are required for verification this conclusion due to limitations of the quality and samples of these studies.

Objective To analyze the flavonoid content of common fruits consumed in China.Method Thirty-eight fruits were sampled from Beijing,Tianjin,Shanghai and Hangzhou.The contents of quercetin,kaempferol,luteolin,myricetin,apigenin were determined with high-performance liquid chromatography.Results Pomegranate and hawthorn were the highest in contents of 5 flavonoids among 38 fruits.Quercetin distributed more widely and was more abundant than other flavonoids in fruits.The daily intake of 5 flavonoids from fruits by Chinese people was estimated to be 2.80 mg.Conclusion The content of flavonoids varies significantly among different fruits and quercetin is the most common flavonoid contained in fruits.

Objective To analyze the flavonoid content of common vegetables consumed in China.Method Forty-six vegetables were sampled from Beijing,Tianjin,Shanghai and Hangzhou.The contents of quercetin,kaempferol,luteolin,myricetin,apigenin were determined with high-performance liquid chromatography.Results Mei celery sampled from Hangzhou was the highest in content of 5 flavonoids among 46 vegetables.Quercetin distributed more widely and was more abundant than other flavonoids in vegetables.The daily intake of 5 flavonoids from vegetables by Chinese people was estimated to be 13.90 mg,in which quercetin accounted for 51.1%.Conclusion The content of flavonoids varies significantly among different vegetables and quercetin is the most common flavonoid contained in vegetables.The dietary intake of flavonoids was more from vegetables than fruits in Chinese people.

AIM: To investigate the antagonistic effect of zinc on hepatic ischemia- reperfusion (HIR) injury and the effect of zinc on the expression of adhesion molecules in rat liver to clarify the mechanisms involved. METHODS: After zinc supplementation (5 ?mol/kg bw,po) , the changes in hepatocellular morphology,ALT and AST activities in serum,MDA levels in serum,and expression of ICAM-1,VCAM-1 in liver of the animals subjected to HIR were examined. RESULTS: The results showed that HIR (30 minutes of ischemia followed by 90 minutes of reperfusion) significantly increased ALT, AST activities and MDA levels in serum. The destruction of hepatic structure was observed in HIR rats. In the mean time, the expression of adhesion molecule was enhanced.After zinc administration, ALT and AST activities in serum and MDA levels in serum were all decreased. The structure of hepatocyte was nearly normal.The further experiment showed that adhesion molecule expression was suppressed.CONCLUSION: These results indicate that zinc may protect liver against ischemia-reperfusion injury by inhibiting the production of free radicals and the expression of adhesion molecule.

Objective: To develop a high performance liquid chromatographic (HPLC) method for determination of riboflavin, FMN, and FAD in human plasma and erythrocytes. Method: Waters 600 model HPLC pump and an Atlantis TM C18 column (150 mm?4.6 mm i.d. 5 ?m) were used. The mobile phase consisted of 35% methanol and 65% 5 mmol/L ammonium acetate solution. The flow rate was 1.0ml/min. The spectro-photofluorimeter was set at wavelength of 450 nm for excitation and 520 nm for emission. Plasma and erythrocyte hemolyzed samples were treated with acetonitrile and chloroform. and the supernatant was analyzed. Results: A good linear correlation existed between riboflavin, FMN and FAD concentration (from 1 to 400 nmol/L) and fluorescence intensity. The detection limits were 2.0 nmol/L, 2.5nmol/L and 2.5nmol/L at a signal to noise ratio of 3, respectively. The intra-assay and inter-assay relative standard deviations were in the range of 1.3% to 3.7%. The recoveries for riboflavin, FMN and FAD in both plasma and erythrocytes were satisfactory. Conclusion:This method for determination of riboflavin,FMN, and FAD in human plasma and erythrocytes is sensitive, rapid and accurate.

Objective: To establish the method of HPLC for determination of 5 flavonoids in vegetables. Methods: The hydrolysis, extraction and HPLC procedures were optimized and used to determine the contents of quercetin, myricetin, luteolin, kaempferol and apigenin in 30 vegetables commonly consumed in Tianjin. Results: The procedures were well optimized with the CV ranging from 2.8% to 6.5%, and the recoveries ranging from 90.2% to 108.4%. The detection limits were 0.4 mg/L for quercetin, luteolin, kaempferol and 0.8mg/L for myricetin and apigenin, respectively. Quercetin was detected in 29 vegetables, ranging from 7.55 mg/100g FW to 0.60 mg/100g FW; apigenin was found in 5 vegetables, luteolin in 7 vegetables and myricetin in 8 vegetables, but no kaempferol in all vegetables. Lotus root, onion, kidney bean, tomato, celery contained higher contents of total flavonoids. Conclusion: The optimized HPLC method was reliable and accurate. The composition of flavonoids was different in analyzed vegetables in which quercetin was predominant almost in all of them.

Objective: To investigate the effects of pomegranate peel extract on antioxidant capacity and lipid metabolism in C57BL/6J mice fed high fat diet in comparison with pomegranate juice extract. Method: The hyperlipidemic model was developed by feeding C57BL/6J mice a high fat diet. The effects of pomegranate peel extract (supplemented in drinking water) on serum FRAP value, paraoxonase(PON), GSH-Px and SOD activities as well as serum and hepatic lipids contents were observed. The morphologic change of aortic walls was also examined. Results: The antioxidant capacity and lipid metabolism were improved by supplementation of pomegranate peel extract in hyperlipidemic mice. The pathologic changes manifested in aortic walls were also inhibited. The pomegranate juice extract presented similar effects. Conclusion: The pomegranate peel extract inhibited the early process of atherosclerosis. The possible mechanisms were related to the improved antioxidant capacity and lipid metabolism.

The effects of high concentrations (1-5mmol/L) of different amino acids in Hanks solution on the proliferation of Ehrlich ascites tumor cells and Walker 256 carcinosarcoma cells were examined. In order to demonstrate the inhibitory effect of some amino acids at high concentration level, the further studies were conducted on Ehrlich ascites tumor cells, human hepatoma cells and lung cancer cells, using Eagle's MEM as culture medium. The possible toxicity of the high concentrations of single amino acids to normal tissue cells was tested on mouse bone marrow cells. Although some amino acids exhibited a significant inhibitory effect, the responses of different tumor cells to the high concentrations of different amino acids were not entirely similar. Moreover, the effects presented by some amino acids on Ehrlich ascites tumor cells in Hanks solution could be diminished or eliminated in Eagle's MEM. Among the aromatic and basic amino acids, only the tryptophan was found to be inhibitory to the multiplication of mouse bone marrow cells at high concentration levels in vitro.

Objective: To investigate the effect of quercetin on hepatic ischemia reperfusion injury (HIRI) in rats.Methods: Quercetin was administered intragastrically. Vitamin C was used as positive control. HIRI was induced by blocking and then releasing portal vein and hepatic artery in rats. The hepatic content of quercetin was analyzed by HPLC. Plasma GPT, GOT activities, MDA concentration and hepa-tic GSH and MDA contents, GSH-Px, SOD, XO activities, total antioxidant capacity (TAOC), ROS, DNA fragmentation were measured.Results: After HIRI, plasma GPT, GOT activities and MDA concentration were increased significantly. Hepatic GSH and TAOC were decreased remarkably. The activities of SOD and GSH-Px were significantly decreased while XO activity, ROS production and DNA fragmentation increased. Intragastric administration of quercetin increased hepatic quercetin and decreased ROS production and plasma activities of GPT, GOT and MDA concentration. Hepatic GSH and SOD, GSH-Px activities and TAOC also recovered remarkably, but no significant change in DNA fragmentation. Vitamin C was also effective in protecting against HIRI. Conclusion: Quercetin is effective against HIRI. The mechanism is associated with increased hepatic antioxidant capacity.