Objective To investigate the feasibility of pig lung cancer model induced by bronchial perfusion of 3,4-benzopyrene. Methods 24 experimental pig were randomly divided into model group and control group, each containing 12 cases. Experimental pigs were under the anaesthetic state, pigs in the model group were given endobronchial infusion of 3,4 - benzopyrene - corn oil mixture, pigs in control group were injected with equal capacity of corn oil.Perfusion 1 times a week for 16 weeks.In week 16,32 and 48,all experimental pig were given lung CT scans, then the lung lesions were observed.After 48 weeks, the pig lung, esophagus, and gastrointestinal tract, liver and brain and other organs were dissected, the presence of tumor formation was observed, and the mass, and experimental pig lung biopsy were given hematoxylin and eosin staining analysis. Results Lung cancers were not found in control group by both CT lung cancers and anatomy. In the model group, pulmonary CT showed space-occupying lesions with different location and size in lungs of 8 pigs, and the space-occupying lesions were confirmed as malignant tumors by pathology, including 3 cases of moderately differentiated adenocarcinoma, 2 cases of highly differentiated squamous cell carcinoma, 1 case of alveolar cell carcinoma,2 cases of adenosquamous carcinoma. Three other pigs and pigs in the control group were not found with tumor by both lung CT and anatomy. Pigs in model group were induced successfully to malignant tumor in 1 year , the total tumor formation rate was 75%,lung tumor formation rate was 66.66%. Conclusion The trachea bronchial perfusion of 3,4- benzopyrene is a simple,safe and reliable way to construct animal models of lung cancer.

Objective:To observe the effect of acupuncture plus medium-frequency electric stimulation on bladder function after radical hysterectomy for cervical cancer. Methods:A total of 170 patients confirmed by biopsy and surgical pathology and treated with radical hysterectomy for cervical cancer were randomly divided into an acupuncture group, an observation group and a control group by random digital table. Fifty-six cases in the acupuncture group were treated with acupuncture after surgery, one session each day, till the extubation day; 58 cases in the observation group were treated with acupuncture plus medium-frequency electric stimulation after surgery, one session each day, till the extubation day; and 56 cases in the control group didn't receive any intervention, and the catheter was retained till the extubation day. On the postoperative day 14, all groups were dealt with catheterization to determine the residual urine volume, in order to observe the occurrence rate of urinary retention and the recovery of bladder function and to compare the differences of the therapeutic effects among the groups. Results:The occurrence rates of urinary retention were respectively 16.1%, 20.7% and 46.4% in the acupuncture group, observation group and control group, with significant differences (P<0.05). When comparing the acupuncture group and the observation group with the control group, there were significant differences (bothP<0.05). In comparison between the acupuncture group and the observation group, there was no significant difference (P>0.05). The recovery rates of bladder function in the three group were respectively 42.9%, 60.3% and 41.1% without significant differences (P>0.05). Moreover, there were no significant between-group differences (P>0.05), but acupuncture plus medium-frequency electric stimulation showed a better tendency. Conclusion: The single application of acupuncture therapy is effective and able to prevent urinary retention after radical hysterectomy for cervical cancer. Acupuncture plus medium-frequency electric stimulation can effectively enhance the recovery of bladder function and reduce the residual urine volume in the bladder to the maximum.

Objective To investigate the application value and effect of lung vascular and lesion positioning guided by Doppler ultrasound in the operation of thoracoscopic lobectomy. Methods Thirty cases of experimental pigs were randomly divided into A, B and C three groups. The group A was operated by conventional thoracoscope for upper right lobectomy, and group B was operated by thoracoscope for upper right lobectomy which guided by Doppler ultrasound cavity prober. Then, the operation time, blood loss and materials costs were compared between the two groups. The group C was used to establish the model of lung cancer and CT scanning was used to indicate the lung lesions. During operation, lesions were positioned by Doppler ultrasound and wedge resections were performed under thoracoscope. Then, the pulmonary lobectomy guided by ultrasound and mediastinal lymph nodes dissection were performed. At last, the coincidence rate of intraoperative ultrasound and CT location was analyzed statistically. Results There were significant differences in operation time between Groups A and B ( < 0.01), while no significant differences in blood loss and material costs ( >0.05) . In group C, lesion location positioning guided by ultrasound during the operation was completely consistent with guided by CT before the operation. No significant differences in the lesion diameter were observed between ultrasound and CT methods ( > 0.05) . Conclusion With the application of Doppler ultrasound, the invisible and untouchable blood vessel can become visible and can be positioned in precise to shorten the time of thoracoscopic lobectomy. In addition, the accurate positioning of tiny lesions in the lung can solve the problem of lung small lesion positioning which is difficult in the operation under thoracoscope. Therefore, it can be promoted in clinical applications in a wide range.

Objective To explore the effects of Helicobacter pylori (H.pylori) on the expression of catalytic subunit of the DNA-dependent protein kinase (DNA-PKcs) and Ku70/Ku80 heterodimer in gastric mucosa epithelial cells in vivo and in vitro.Methods After treated with H.pylori for one,three,six,12 and 24 hours,the expressions of DNA-PKcs and Ku70/Ku80 heterodimer in gastric epithelial cells (GES) 1 and gastric adenocarinoma cells (AGS) were detected by Western blot.Mongolian gerbils were gavaged with H.pylori,and were sacrificed after infected for six and 12 months.The gastric mucosa tissues were taken for immunohistochemistry to detect the expressions of DNA-PKcs and Ku70/Ku80 heterodimer at protein level.The data were analyzed by t test and chi-square test.Results After H.pylori infection for one hour,the relative quantity of the expression of DNA-PKcs in GES-1 was 1.16±0.09,which was higher than that of non infected group (1.04±0.31) and the difference was statistically significant (t=4.67,P＜0.05).After infected by H.pylori for one,three,six,12 and 24 hours,the relative quantities of the expressions of Ku70/Ku80 heterodimer in GES-1 were 1.58±0.32,1.84±0.40,1.97±0.35,3.72±1.42 and 3.74±1.56,respectively,all were higher than that of non infected group (1.24±0.31) and the differences were statistically significant (t=3.57,4.20,5.03,8.11 and 8.14,all P＜0.05).The relative quantities of the expressions of Ku70/Ku80 heterodimer in AGS were 4.69 ± 0.87,3.67 ± 0.67,2.41±0.24,1.35±0.35 and 1.32±0.10 after H.pylori infected for one,three,six,12 and 24 hours,respectively,all were lower than that of no H.pylori infected group (4.84 ± 0.76) and the differences were statistically significant (t=34.13,27.68,19.81,4.47 and 5.69,all P＜0.05).In Mongolian gerbil models,DNA-PKcs did not express in H.pylori negative group (0/25),the total positive rate of H.pylori infected group was 98.1％ (53/54),the difference between the two groups was statistically significant (x2 =74.55,P＜0.01).The total positive rate of Ku70/Ku80 heterodimer in H.pylori negative group was 92.0％ (23/25) and in H.pylori infected group was 68.5％ (37/54),the difference between the two groups was statistically significant (x2=5.16,P＜0.05).Conclusion H.pylori infection affected cellular DNA damage repair through changing the expression of DNA-PKcs and Ku70/Ku80 heterodimer in gastric mucosa in vivo and in vitro,which may cause gastric mucosal lesions.

Purpose To establish rabbit VX2 tumor model and to explore the relation between perfusion parameters and the expression of the VEGF in the portal vein VX2 implanting tumor emboli. Materials and Methods VX2 tumor was implanted in the portal vein of eight experimental rabbits. Multi-slice CT (MSCT) perfusion scan was performed after tumor formation to measure and compare portal vein tumor thrombus, hepatic blood lfow (HBF) near tumor foci and far away from tumor foci, hepatic blood volume (HBV), probability of surface area product (PS) and mean transit time (MTT). The VX2 tumor emboli were then resected to analyze the relationship between the liver perfusion parameters and VEGF expression using immunohistochemical method. Results MSCT liver perfusion parameters were not statistically signiifcant between foci close to or far away from the tumor (P>0.05). The HBF, HBV and PS within the tumor emboli were higher than that in hepatic parenchyma (P<0.05) and the MTT was higher (P<0.05). There was positive correlation (r=0.711, 0.646 and 0.626, P<0.05) between the HBF, HBV and PS of portal vein VX2 tumor emboli and VEGF expression, and there was negative correlation between MTT and VEGF expression (r=-0.565, P<0.05). Conclusion MSCT perfusion parameters in the portal vein VX2 implanting tumor emboli and the expression of VEGF are positively related. MSCT can evaluate the angiogenesis of portal vein VX2 implanting tumor emboli.

Objective To explore the effect of suledexide on renal injury and podocalyxin expression of podocytes in STZ diabetic desoxycorticosterone acetate (DOCA)-hypertensive rats. Methods Wistar rats were subjected to subcutaneous injection of streptozotocin(STZ), followed by uninephrectomy and subcutaneous administration of DOCA. Diabetic and hypertensive rats were randomly allocated to treatment with sulodexide or a combination of sulodexide and telmisartan for 8 weeks. Blood pressure (BP), 24-hour urinary albumin were measured every 2 weeks. Blood and urinary samples were collected to detect biochemical indexes of plasma and urinary β-acetyl-β-D-glucosaminidase (NAG) at the end of the study. Immunohistochemistry (IHC), RT-PCR and Western blot were performed to examine the expression and distribution of podocalyxin. Results STZ +DOCA-treated rats progressively developed hypertension, albuminuria and hyperglycemia. Hyperlipidemia and hypoinsulinemia were found in diabetic and hypertensive rats compared with controls. Albuminuia was significantly reduced in sulodexide group at week 8 and sulodexide plus telmisartan group at week 6 and week 8. Blood pressure decreased in sulodexide plus telmisartan group. No significant effects on lipid and glucose metabolism were observed in all treated groups. Histopathological index increased in STZ+DOCA-treated rats, but was significantly lower in sulodexide group as well as sulodexide plus telmisartan group. The number of podocytes on glomerular cross-section of the four groups were comparable. Segmental loss and down-regulation of podocalyxin were detected in STZ+DOCA-treated rats, which were greatly attenuated by sulodexinde, meanwhile, combination treatment preserved more podocalyxin expression in glomeruli than sulodexide monotherapy. Conclusion Sulodexide effectively reduces albuminuria, prevents loss of podocyte podocalyxin and alleviates renal damage in STZ diabetic DOCA-hypertensive rats.

Adult ; Endocarditis ; complications ; microbiology ; Female ; Humans ; Pulmonary Embolism ; etiology ; Pulmonary Valve ; microbiology

Objective To study the expression of Rho kinase and its functional activation in lung tissue from hypoxic pulmonary hypertension(HPH) rat model,and the effects of fasudil on HPH.Methods Seventy-two male Spraque-Dawley rats were randomly divided into the control group,hypoxic model group,and fasudil-intervention group[group with hypoxia and fasudil for 15 mg/(kg?d)],respectively.Mean pulmonary arterial pressure(mPAP) and right ventricle hypertrophy index(RVHI) were measured.Expression of Rho kinase mRNA and protein were examined by reverse transcriptase-polymerase chain reaction(RT-PCR) and Western blot,respectively.The phosphorylation of binding subunit of myosin phosphatase(MBS)-a substrate of Rho kinase was detected by Western blot and defined,as the mark of functional activation of the kinase.Results The expression of Rho kinase mRNA in hypoxic model group was markedly upregulated even before the onset of the third day after the experiment(HPH),and it was much lower in rats of fasudil group than that of hypoxic model group.The phosphorylation of MBS was significantly higher in hypoxic model group than that in control group,and it was positively correlated with the mPAP and RVHI(all P

Animals ; Animals, Newborn ; Hippocampus ; cytology ; drug effects ; physiology ; Interleukin-6 ; pharmacology ; Ion Channels ; drug effects ; physiology ; N-Methylaspartate ; physiology ; Neurons ; drug effects ; physiology ; Patch-Clamp Techniques ; Rats ; Rats, Wistar

Animals ; Electrical Synapses ; Male ; Membrane Potentials ; physiology ; Neurons ; physiology ; Parietal Lobe ; cytology ; Patch-Clamp Techniques ; Rats ; Rats, Wistar