Objective To investigate the effect of emulsified isoflurane preconditioning on focal cerebral ischemia-reperfusion (I/R) injury in rats and the mechanism. Methods Fifty-six healthy male adult SD rats weighing 250-280 g were randomly divided into 4 groups (n = 14): group Ⅰ sham operation (group S); group Ⅱfocal cerebral I/R; group Ⅲ emulsified isoflurane preconditioning and group Ⅳ fat emulsion preconditioning. Focal cerebral ischemia was induced by middle cerebral artery occlusion (MCAO) using a nylon thread with rounded tip inserted into internal carotid artery and advanced cranially until resistance was met. MCAO was maintained for 2 h followed by 24 h reperfusion. In group Ⅲ and Ⅳ 8% emulsified isoflurane 7.5 ml/kg and 3% fat emulsion 7.5 ml/kg were injected intraperitoneally at 24 h before MCAO respectively. Neurologic outcome was evaluated at 24 h of reperfusion and scored (0 = no deficit, 4 = unable to crawl, loss of consciousness). The animals were then killed and brains removed. The infarct size was assessed. The apoptotic cells were detected by TUNEL and calculated. The expression of Bax, Bcl-2, cytochrome C and caspase-3 protein was detected by immunohistochemical staining. Results The neurologic deficit scores were significantly lower in emulsified isoflurane preconditioning group than in I/R group. Preconditioning with emulsified isoflurane significantly decreased the infarct size and the number of apoptotic cells and increased the expression of Bcl-2 protein and inhibited the expression of Bax, cytochrome C and caspace-3 protein. Conclusion Emulsified iscflurane preconditioning can protect the brain from focal cerebral I/R by increasing Bcl-2 protein expression and decreasing Bax protein expression, and reducing cytochrome C release from mitochondria, caspase-3 activation and neuronal apoptosis.

Objective To investigate the feasibility and effectiveness of inducing cerebral vasuspasm by injecting autologous blood into cisterna magna (CM) twice after puncture of CM with a fine needle in dogs.Methods Six healthy aduh mongrel dogs of both sexes weighing 14-18 kg were involved in this study. The animals were anesthetized with intraperituneal 3% pentobarbital sodium 30-40 mg/kg. Spontaneous breathing was kept. Nonheparinized autologous arterial blood 0.5 ml/kg was injected into CM twice at the rate of 0.5 ml/s at 48 h interval after puncture of CM with a fine needle. Neurological function was assessed and scored ( 1 = normal, 5 =dead) and CT angiography was performed to determine the diameter of cerebral basilar artery before the first CM injection (T1 , baseline) and at days 7, 14 and 21 after the second CM injection (T2.4 ). Results The injection of autologous blood into CM twice significantly increased the success rate of the puncture and intraoporative survival rote of the animal*. The neurological function scores were significantly increased and diameter of cerebral basilar artery shortened at T2 and T3 compared with the baseline value. Conclusion The model of cerebral vasospasm after subarachnoid hemorrhage can be successfully established by injecting autologous blood into CM twice following puncture of CM with a fine needle in dogs, with higher postoperative survival rate and less injury to the animals.

Hepatitis E ; Hepatitis, Viral, Human ; Humans

Damage of tissues and organs by wound,tumor resection,and congenital malformation is always the tough problems to clinician.At present,the damaged tissues and organs are usually replaced by tissue and organ transplantation or by bionic implantation in clinic.Although these methods have some advantages respectively,they have some serious drawbacks at the same times.Regenerative medicine,which depends on the findings of regenerative biology research,applies the cellular therapeutics based on cell transplantation and the principle of tissue engineering with biomaterial as scaffolds to the repair or replacement of the damaged tissues or organs.The goal of the regenerative medicine is to reconstruct the structure and restore the function of damaged tissues or organs by promoting the regenerative potential of adult stem ceils(ASC)in vivo.This paper focuses on the recent research progress in the field of regenerative biology and medicine.

Objective To compare the clinical therapeutic effect and safety of rifapentine and rifampicin in smear positive pulmonary tuberculosis patients.Methods A total of 80 patients with smear positive pulmonary tuberculosis were chosen in Changshan People's Hospital from June 2015 to July 2016,the patients were randomly divided into control group(n=40)and observation group(n=40).The control group used rifampicin treatment,observation group were treated with rifapentine therapy,the therapeutic effect and incidence of complications between two groups were compared.Results Proportion of the sputum smear negative,cavity closure and lesions absorption in the observation group after 6 months of treatment were significantly higher than those in the control group; peripheral blood T lymphocyte subsets CD3+,CD4+,CD8+ levels in two groups before treatment had no statistically significant differences; peripheral blood of T lymphocyte subsets CD3+,CD4+,CD8+ levels in the observation group after treatment were significantly higher than those in the control group(P<0.05); incidence of complications in observation group(7.5％)after treatment was significantly lower than that in the control group(17.5％)(P<0.05).Conclusion Compared with rifampicin in treatment of smear positive pulmonary tuberculosis patients,rifapentine has ideal treatment effect,can improve the immune function,low incidence of complications.

Objective To evaluate the effect of vascular endothelial growth factor (VEGF) expression on varicose recurrence in esophagus after devascularization in portal hypertensive rats. Methods Murine pre-hepatic portal hypertension (PHPH) was induced by partial portal vein stenosis. 3 weeks after the establishment of the PHPH, all rats including sham operation group (SO) underwent devascularization. Esophagus was sampled at the time of 1, 3, 5, 7, 14, 30, 90 days after devascularization respectively. The expression of VEGF and factor Ⅷ related antigen (FⅧAg) was detected by immunohistochemistry,and the microvessel density (MVD) was counted under FⅧAg staining. ResultsCompared to the SO rats, the MVD of esophagus in PHPH rats increased significantly before devascularization(P0.05). At the third month after devascularization, the MVD of PHPH rats was higher than that of SO rats. In SO rats, MVD increased after devascularization, reaching the peak on the third day and then levelling off.The expression of VEGF before devascularization in PHPH rats was significantly higher than in SO rats, and VEGF experssion was on the pinnacle in two groups after devascularization, but the expression time of PHPH rats was significantly longer than SO rats(P

Objective To investigate the characteristics,treatment and prognosis of Rowell's syndrome.Methods Clinical data were collected from 6 inpatients with Rowell's syndrome from July 2009 to July 2015,and retrospectively analyzed.Results All the patients were female,of them,2 developed skin lesions after sun exposure,2 had medication history,1 had Staphylococcus aureus infection before occurrence of skin lesions,and 1 had no obvious precipitating factor.Skin lesions spread from the face to the whole body in 4 cases,from the dorsal hauds to the whole body in 1 case,and were confined to the face,both hands and feet in 1 case.All the 6 patients had chilblain-like lesions in the digit tips,and 5 patients had fever.Among these patients,6 were positive for antinuclear antibodies (granular pattern),4 for anti-Sm antibodies,5 for anti-U 1RNP antibodies,4 for anti-SSA antibodies,2 for anti-dsDNA antibodies,and 1 was positive for both anti-SSA and anti-SSB antibodies.Histopathological examination revealed hyperkeratinization,mild hyperplasia,partial necrosis,many dyskeratocytes,liquifaction degeneration of basal cells in the epidermis,and perivascular infiltration of lymphocytes in the superficial dermis.After admission,1 patient was finally diagnosed with subacute cutaneous lupus erythematosus (SCLE),and 5 with systemic lupus erythematosus (SLE).All the 6 patients were treated with prednisone at a dose of 0.6-1.0 mg·kg-1 ·d-1,and 1 was also treated with gamma globulin (200 mg/d).During the process of glucocorticoid tapering,hydroxychloroquine was administered at 0.2 g twice a day.During 1-year follow-up,neither erythema multiform nor chilblain-like lesions recurred in 5 patients,and 1 patient was lost to follow-up.Conclusions Rowell's syndrome frequently occurs in women.Glucocorticoids are a mainstay of its treatment,and their tapering should be slower in patients with Rowell's syndrome than in those with lupus erythematosus.

The effect of chitin on human umbilical vein endothelial cells (HUVECs) injured by oxygen free radicals was investigated in vitro. The degree of injury was determined by the amount of malondialdehyde (MDA) and lactic dehydrogenase (LDH) in the culture medium. The results indicated that chitin could reduce the amount of MDA and LDH significantly, showing that chitin could protect HUVECs from oxygen free radicals injury.

Objective:To explore and optimize the preparation method of specimen about mouse liver tissue for scanning electron microscopy.Methods: The specimens of mouse liver using for scanning electron microscope were prepared through improving the fixed location of perfusion, optimizing material and procedure of perfusion, adopting fixation of perfusion via portal vein and changing the process of fixation and so on. And the results of morphological observation of histocyte were compared between the improved method and traditional method.Results: The improved preparation method could save the liver tissue and the living state of the cells in preferably situation. By using this method, the ultra-micro morphological structure of liver tissue and cell could be clearly observed and the ideal effect of observation could be achieved. Besides, its operation was simple and its success rate was high. Therefore, it was superior to traditional method.Conclusion: The preparation of specimen about the fixation of mouse liver tissue via perfusion of portal vein for scanning electron microscope is a superior method, which has certain applied value.