Objective To investigate the effects of emulsified isoflurane preconditioning on lung ischemia-reperfusion (Ⅰ/R) injury in rats.Methods Thirty-two male Sprague-Dawley rats,weighing 250-320 g,were randomly divided into 4 groups (n =8 each) using a random number table:sham operation group (group S),group Ⅰ/R,intralipid group (group IL),and emulsified isoflurane preconditioning group (group EI).Lung Ⅰ/R was produced by clamping the left hilum of lungs for 1 h followed by 2 h of reperfusion in anesthetized rats.In group S,intraperitoneal normal saline 10.5 ml/kg was injected,but the hilum was only exposed 24 h later.In groups Ⅰ/R,IL and EI,intraperitoneal normal saline 10.5 ml/kg,30％ intralipid 10.5 ml/kg and 8％ emulsified isoflurane 10.5 ml/kg were injected intraperitoneally,respectively,and then the model was established 24 h later.At the end of reperfusion,blood samples were collected from the left ventricle for measurement of PaO2,PaCO2,plasma malondialdehyde (MDA) concentration (by ELISA).The rats were then sacrificed,and left lungs were removed immediately for microscopic examination and for determination of myleoperoxidase (MPO) activity (using colorimetric method) in pulmonary specimens.Wet/dry lung weight ratio (W/D ratio) was calculated.Results Compared with group S,W/D ratio,MPO activity,plasma MDA concentration and PaCO2 were significantly increased,and PaO2 was decreased in the other three groups.Compared with group Ⅰ/R,W/D ratio,MPO activity,plasma MDA concentration and PaCO2 were significantly decreased,and PaO2 was increased in IL and EI groups.W/D ratio,MPO activity,plasma MDA concentration and PaCO2 were significantly lower,and PaO2 was higher in group EI than in group IL.The pathological changes of the lung were significantly attenuated in group EI compared with group Ⅰ/R.Conclusion Emulsified isoflurane preconditioning can reduce lung Ⅰ/R injury in rats,and inhibition of pulmonary inflammatory responses and of production of oxygen free radicals are involved in the mechanism.

Objective To investigate the rule of cell apoptosis after intracerebral hemorrhage (ICH) in rats, and to analyze the effect of Astragalus injection on the brain tissue water content and cell apoptosis perihematoma.Methods Experimental ICH models of rats were produced in by injection of Collagenase into right caudate nucleus using stereotaxis technique. After operation, 160 SD rats were randomly divided into 4 test groups according to different intervention time (operation meanwhile group, 6 h group,12 h group and 24 h group after operation, 32 rats in each group) and hemorrhagic control group (32 rats). The rats in test groups were treated with Astragalus injection intraperitoneally once a day. All ICH animals were killed at 4 d or 7 d after ICH. 12 rats from the above each group were used to measure brain tissue water content (dry-wet method). The effect of different initiation time point of treatment on brain tissue water content and cell apoptosis perihematoma was observed. The apoptosis perihematoma was detected by TUNEL technique.Results Compared with hemorrhagic control group, brain tissue water contents improved significantly in operation meanwhile group (4 d), 6 h group (both 4 d and 7 d) and 12 h group (4 d)(all P

Objective To evaluate the clinical application of Helix water-jet dissector in complex hepatectomy. Methods Clinical data were retrospectively analyzed in 47 patients who received complex hepatectomy using Helix water-jet dissector for the parenchymal division. It was evaluated for the intraoperative blood loss, operation time, postoperative hepatic function and complications in these patients.Results Forty seven patients including 10 cases of hepatic giant cavernous hemangioma, 34 cases of hepatocellular carcinoma, and 3 cases of miscellaneous liver tumors. Among these patients, caudate lobe resection was performed in 6 cases, hepatic segment Ⅵ + Ⅷ resection in 19 cases, segment Ⅳ + Ⅴ + Ⅷresection in 9 cases, segment Ⅷ resection in 5 cases and right hepatic trisegmentectomy in 8 cases. The operation time was (240 ±85) min, intraoperative blood loss was (950 +650) ml, 13 out of 47patients (27.7%) received heterologous packed red blood cell (PRBC) transfusion for more than 2 units per case.Length of stay in hospital was ( 12. 5 ±4. 7) days. Post-operative complications included ascites in 6 cases,hydrothorax in 4 cases, atelectasis in 2 cases and pulmonary infection in 4 cases. No severe complications and death occurred in this group. Conclusion Water-jet dissector may increase operation accuracy,decrease massive blood loss and postoperative complications, therefore, it should be widely used in complex hepatectomy.

Objective To investigate the protective effects of ischemic preconditioning on myocardial ischemia/reperfusion injury in diabetic rats.Methods Twenty-eight healthy male rats were injected streptozotocin at dose of 45 mg/kg by tail and be fed with normal diet for 4 weeks,then rats were randomly divided into iscbemia/reperfusion (I/R) group and ischemic preconditioning (IP) group.ST segment of electrocardiograph changes and arrhythmias of all rats were recorded before ischemia and 0,15,30 minuets after ischemia and 0.5,2 h after reperfusion.TTC staining was performed to determine myocardial infarct size.TUNEL assay was used to assesse cardiomyocyte apoptosis.The expression of antiapoptotic gene (Bcl-2) and proapoptotic (Bax) was determined by immunohistochemistry.Results Compared with I/R group,ST segment elevation of patients in IP group decrease from (0.675 ±0.150) mV to (0.489 ±0.161) mV at 30 min after ischemia(P ＜0.05).Meanwhile the onset of ventricular premature contraction(VPC) in IP group was (18.21 ± 5.36) min,later than that of control group ((6.47 ± 4.28) min,t =5.241,P =0.000).The duration of VPC was (6.07 ± 4.33) min,shorter than that of I/R group ((16.71 ± 5.48) min,t =4.924,P ＜ 0.01)).The incidence of ventricular tachycardia (VT) and ventricular fibrillation (VF) of lP group remarkably decreased compared with I/R group (VT:57.14％ (8/14) vs.14.29％ (2/14),x2 =5.600,P =0.018 ; VF:50.00％ (7/ 14) vs.14.29％ (2/14),x2 =4.094,P=0.043).The myocardial infarct size in IP group was (12.50 ± 9.45) ％,smaller than that of I/R group ((37.50 ± 11.40)％,t =3.211,P =0.006).Cardiomyocyte apoptotic index (AI) was attenuated in IP group than that of I/R group((24.31 ± 3.12)％ vs.(19.01 ± 4.32)％,t =3.227,P =0.006),which was correlate with increased the ratio of Bcl-2/Bax((0.103 ±0.045) vs.(0.221 ±0.101),t =2.670,P =0.015).Conclusion IP treatment for diabetic rats shows a protect effect on myocardial I/R injury through attenuating myocardial apoptosis,and increasing the ratio of Bcl-2/Bax.

Objective To investigate the clinical effectiveness of oral ganciclovir on prevention and treatment of cytomegalovirus (CMV) infections after liver transplantation.Method We tested archival peripheral blood of 69 kidney recipients for CYP3A5 genotyping by polymerase chain reaction sequence-specific primer.The dose,blood concentrations and dose-normalized blood concentrations of tacrolimus were measured at 1 st and 2nd month after the renal transplantation.Result pp65 antigen of CMV was negative in all the patients before liver transplantation.In 72 patients subject to acyclovir,9 cases (12.5％) were infected by CMV.By using oral ganciclovir to prevent CMV infection after 1iver transplantation in 376 patients,pp65 antigen of CMV was detected in 17 patients (4.5％).Fifteen patients received intravenous ganciclovir for treatment of CMV infection or CMV pneumonia,and 6 patients (40％) suffered from granulocytopenia because of the use of intravenous ganciclovir.Forty-six patients (12.2％) suffered from granulocytopenia because of the use of oral ganciclovir.Conclusion Oral ganciclovir is a safe and effective drug for prevention and treatment of CMV infection.

Objective To explore the effects of infusion per unit of weight on pulmonary edema and acute respiratory distress syndrome (ARDS).Methods The clinical data of 70 patients with cirrhosis who had accepted liver transplantation were retrospectively collected,including the age,height,weight,BMI,preoperative liver function,indexes during liver transplantation and the postoperative intake and output records in the first 5 days,and the emerging postoperative pulmonary complications (EPPCs) in the first 2 weeks were screened.The relationship between clinical data and new pulmonary edema and ARDS was analyzed.Results The incidence rate of NPPCs was 82.9 ％,in which the incidence rate of pleural effusion,atelectasis,pulmonary edema,ARDS and pulmonary infection was 60.0％,14.7％,8.6％,31.4％ and 10％ respectively.In the pulmonary edema group (n =6),the preoperative Child-Pugh score (9.3 ± 1.6),the total volume (2 667 ± 1 164) ml and the volume of unit weight (39.4 ± 19.0) ml/kg of plasma transfusion,the total volume (1 417 ± 376) ml of artificial colloid during operation,and the input of unit weight (53.2 ± 9.3 ml/kg) on the 3rd day after operation were significantly different from those (7.6 ± 1.9,1 753 ± 1 040 ml,24.2 ± 15.7 ml/ kg,2 347 ± 1 088 ml,and 44.6 ± 10.1 ml/kg) in the group (n =64) without pulmonary edema.Their P values in the order were 0.028,0.046,0.029,0.046,and 0.046.In the ARDS group (n =22),the plasma transfusion volume per unit of weight during operation (31.3 ± 20.4 ml/kg),the total balance volume equaled with the difference of input and output (1 504 ± 894 ml) and the balance volume per unit of weight (22.1 ± 13.1 ml/kg) on the first postoperative day and the total input volume per unit of weight on the third postoperative day (49.0 ± 10.1 ml/kg) were significantly distinguished with those (22.7 ± 13.4 ml/kg,910 ± 684 ml,12.7 ± 9.9 ml/kg,and 43.6 ± 9.9 ml/kg) in the group (n =48) without ARDS.The P values in the order were 0.045,0.003,0.001 and 0.042 respectively.Conclusion The incidence rate of NPPCs in the patients with cirrhosis receiving the liver transplantation is relatively higher.In order to reduce the risk of NPPCs,based on the hemodynamic stability during operation,the artificial colloids should be appropriately increased and excessive plasma transfusion reduced.In addition,the redundant input should be limited according to the weigh,in the first and third postoperative days.

The experiment aimed to study the toxic effect of oral ricin on gastrointestinal tract and immune organs of mice with the dose of 1/5 LD50.In early days of intoxication,there was an obviously decrease in daffy weight and relative weight of thymus and spleen,fllowing the excretion of toxin,they had a trend of recovering to the normal state.Also,results of pathological section,scanning electron microscope and transmission electron microscope showed that ricin would induce a series of pathological reaction in intestines,meanwhile,the splenocytes displayed significant symptom of apoptosis and necrosis.

Objective To evaluate the role of c-Jun N-terminal kinase (JNK) signaling pathway in the protective effect of isoflurane preconditioning and sevoflurane preconditioning against oxygen-glucose deprivation (OGD) injury in rat hippocampal slices. Methods Male adult SD rats weighing 270-290 g were anesthetized with ether and decapitated. The hippocampi were removed and sagittally sliced (400 μm thick) and placed in artificial cerebral spinal fluid aerated with 95% O2-5% CO2 . Ninety-six hippocampal slices were randomly divided into 8 groups (n = 12 each): control group (group C), OGD group, isoflurane preconditioning group (group Iso),sevoflurane preconditioning group (group Sevo) , SP600125 + isoflurane preconditioning group (group SP + Iso),SP600125 +sevoflurane preconditioning group (group SP + Sevo), DMSO + isoflurane preconditioning group (group DMSO + Iso) and DMSO + sevoflurane preconditioning group (group DMSO + Sevo). Electrophysiological technique was used to record the amplitude of population spike ( PS) in the stratum pyramidale of CA1 region and the degree of recovery of PS was calculated. The cell viability was determined by propidium iodide staining. Results Compared with group C, the degree of recovery of PS and cell viability were significantly decreased in the other groups ( P ＜ 0.01) . Compared with group OGD, the degree of recovery of PS and cell viability were significantly increased in groups Iso, Sevo, SP+Iso, SP+Sevo, DMSO+ Iso and DMSO + Sevo (P＜ 0.01). Compared with group Iso, the degree of recovery of PS and cell viability were significantly increased in group SP+Iso ( P ＜ 0.01) , while no significant change was found in group DMSO + Iso ( P ＞ 0.05) . Compared with group Sevo, the degree of recovery of PS and cell viability were significantly increased in group SP + Sevo ( P ＜ 0.01) , while no significant change was found in group DMSO + Sevo ( P ＞ 0.05). Conclusion Isoflurane preconditioning and sevoflurane preconditioning can attenuate the OGD injury to rat hippocampal slices through inhibiting JNK signaling pathway.

To investigate the effects of Baihe Recipe, a compound traditional Chinese herbal medicine, on growth and metastasis of orthotopically transplanted gastric carcinoma and the expressions of vascular endothelial growth factor (VEGF) and p53 proteins in the tumor tissues in nude mice.

Objective To investigate mutation patterns in core promoter(CP)region of hepatitis B virus(HBV).Methods HBV DNA was extracted from sera of patients with chronic HBV infection.The CP sequence was amplified by polymerase chain reaction(PCR)and cloned into pMD19 T vector.The positive clones were then sequenced.The sequences were compared with known HBV genome in GenBank to identify the mutation sites and patterns of patients with chronic HBV infection.Results There were 74 clones from 21 patients with chronic HBV infection which were sequenced.The sequence comparisons showed that there was a 234-nucleotide deletion in CP region of HBV genome in 54 clones and a 245-nucleotide deletion in one clone.These deletion regions included CP,HBeAg initiation codon and direct repeat sequence(DR)Ⅰ regions,which named CP deletion(CPD).A1585T replacement mutation was also found in HBV strain with CPD,which indicated that there was linkage between these two mutations.Conclusions A novel mechanism of HBeAg negative chronic hepatitis B is observed,which includes deletions of CP and HBeAg initiation codon.Meanwhile,a simple and useful PCR method is developed to detect CPD.