0.05)in cell volume between the experimental group and control group after exposured in hypertonic NaCl saline for 15 minutes. Compared with the control level,after 60 minutes and 1 day all astrocytes shrunk significantly, (P0.05). Conclusion:Astrocytes can restore their cell volume following exposition in hypertonic saline.

0.05). The cell volume of astrocytes was not significantly changed after exposition to hypertonic-hyperoncotic solution for 15 minutes. After 60 minutes all astrocytes shrunk significantly until 1 day later. 7 days later,their volumes restored to the value in control group. Conclusion: The hippocampal neuroncs have not the autoregulative ability of the cellular volume. but astrocytes have after exposition to hypertonic-hyperoncotic solution for 15 min: the volume of both cells 7 days later can restore to the previous value.

Objective To investigate the influence of thiopentone, midazolam, etomidate and propofol on the suxamethonium-induced serum potassium increase, muscle fasciculations and myalgia Methods Sixty patients, ASA class Ⅰ-Ⅱ were allocated randomly to receiving intravenous thiopentone 5mg/kg(thiopentone-group), midazolam 0.3mg/kg( midazolam-group), etomidate 0.3mg/kg(etomidate-group)or propofol 2mg/kg(propofol-group) respectively, followed by intravenous suxamethonium and tracheal intubation. Serum potassium concentration was measured before induction and intubation and after intubation. The incidences of muscle fasciculation during induction and postoperative mylgia were observed .Results As compared with that before induction ,the serum potassium levels in thiopentone- and etomidate-group increased significantly by 3.4% and 5.3% respectively after induction (P0.05).The incidences of muscle fasciculation and postoperative myalgia inmidazolam- and propofol -group were significantly lower than in thiopentone- and etomidate -group (P

Objective To evaluate the effects of penehyclidine hydrochloride (PHC) on the expression of Toll like receptor-4 (TLR4) and nuclear factor kappa B (NF-κcB) in a rat model of sepsis-induced acute lung injury (ALI).Methods Seventy-two adult male Sprague-Dawley rats,weighing 180-220 g,were randomly divided into 3 groups (n =24 each) using a random number table:shame operation group (group S),ALI group and PHC group.Sepsis-induced ALl was induced by cecal ligation and puncture in anesthetized rats.In group PHC,PHC 0.45 mg/kg was intramuscularly injected immediately after cecal ligation and puncture.At 6,12,24 and 36 h after ligation,the broncho-alveolar lavage fluid (BALF) was collected for detection of TNF-α and IL-6 concentrations and the lungs were removed for determination of the expression of TLR4 (using RT-PCR and Western blot) and NF-κBp65 (using Western blot) in lung tissues and for microscopic examination.The pathological changes of lungs were scored.The wet to dry lung weight (W/D) ratio was calculated and the activity of myeloperoxidase (MPO) in lung tissues was measured.Results As compared with S group,the IL-6 concentrations in BALF at 6,12 and 24 h after ligation,TNF-α concentration in BALF at 6 and 12 h after ligation,and the expression of TLR4 and NF-κBp65,pathological scores,W/D ratio and MPO activity at each time point were significantly increased in ALI group (P ＜ 0.05).Compared with ALI group,the TNF-α concentration in BALF at 6 and 12 h after ligation,and IL-6 concentrations in BALF,the expression of TLR4 and NF-κBp65,pathological scores,W/D ratio and MPO activity at each time point were significantly decreased in group PHC (P ＜ 0.05).Conclusion PHC inhibits NF-κB activation and decreases inflammatory responses through blocking TLR4 expression in lung tissues,thus attenuating sepsis-induced ALI in rats.

Objective To investigate the effects of ulinastatin on plasma ?-glucuronidase ?-GCD) activity, granulocyte elastase (Gel) and fibronectin (Fn) concentrations and the dose-effect relationships of ulinastatin with them during cardiopulmonary bypass (CPB) .Methods Thirty ASA Ⅱ - Ⅲ patients (19 male, 11 female) aged 3-29 yr, weighing 12-61 kg undergoing elective open heart surgery with CPB were randomly divided into two groups : ulinastatin group (U n - 15) and control group (C n = 12) . In group U patients received ulinastatin 200 000 U in 20 ml of normal saline (NS) infused iv over 10 min after induction of anesthesia and before CPB. An additional 200 000 U of ulinastatin was given iv if CPB lasted for more than 4 h. In control group NS was given iv instead of ulinastatin. Blood samples were taken before anesthesia and after CPB for determination of plasma ?-GCD activity and Gel and Fn levels. The differences in ?-GCD, Gel and Fn between baseline and post-CPB values were calculated (△?-GCD, △Gel, △Fn). In group C the correlation between △?-GCD and AGel;△?-GCD and △Fn; △Gel and △Fn and in group U the correlation of the dose of ulinastatin (U?kg-1 body weight) with △?-GCD /△Gel /△Fn were studied.Results (1) There was no significant difference in plasma ?-GCD activity, Gel and Fn levels between the two groups before anesthesia ( P

AIM: To clarify the role of heme oxygenase-endogenous carbon monoxide (HO-CO) in the regulation of cardiac function during lipopolysaccharide (LPS) shock in rats. METHODS: Forty healthy Sprague-Dawley rats were divided into four groups randomly (n=10 in each group): control group (group C), ZnPP-IX group (group Z), LPS shock group (group S) and LPS shock+ZnPP-IX (group LZ). The LVSP and ?dp/dt_ max were monitored before and after administration of ZnPP-IX or sodium bicarbonate vehicle intraperitoneally in four groups. LDH, CK and COHb of plasma, and HO-1 mRNA, HO-2 mRNA, HO-1 protein and HO-2 protein from left ventricle tissue were measured 6 h after LPS (or 0.9% saline vehicle) injection in four groups. RESULTS: ① The LVSP and ?dp/dt_ max in group LZ were obviously lower than that in group S, respectively (P0.05). CONCLUSION: The upregulation of HO-1 protein followed by increase in CO may contribute to protection of cardiac function during septic shock in rats.

Objective To evaluate the effect of stereotactic radiotherapy combined with conventional radiotherapy for non-small cell lung cancer(NSCLC)patients with positive stump at the resected bronchial margin. Methods From June 1996 to November 2000, 41 NSCLC patients in whom microscopic residual disease found pathologically at the resected bronchial margin were treated by: conventional radiotherapy followed by stereotactic radiotherapy ( RT+SRT group 18 patients), while the other 23 patients received routine radiotherapy alone (RT group). Results The 1-,2-and 3-year local disease-free rates were better in RT+ SRT group (92.3%,~83.1% and 83.1%) than those in RT group (80.2%,60.2% and 39.5% ). However, no significant difference was found in the complication rate or survival rate between the two groups. Conclusions Stereotactic radiotherapy is effective as a boost irradiation to patients with non-small cell lung cancer with microscopic residual disease at the resected bronchial margin by improving the local control.

Background and purpose:HIF-1?、HER-2 and survivin are all considered as important prognostic factors of breast cancer,but the relationships among them are poorly understood.We investigated the expression of HIF-1?、HER-2 and survivin in Breast Carcinoma,and explored the relationship among the three prognostic factors.Methods:The expressions of HIF-1?、HER-2 and survivin were detected by immunohistochemistry in 51 human Breast Carcinoma samples.Results:① 28(54.88%),11(21.69%) and 35(68.62%) were positive for HIF-1?、HER-2 and survivin,respectively.② A significant difference was found in terms of the overexpression of HER-2 between the samples with HIF-1? either positive or negatiwe(P0.05).Conclusions:The positive expression of HIF-1? was strongly correlated with the overexpression of HER-2,but not survivin in breast carcinoma.

Objective To investigate the alteration in intercellular adhesion molecule (ICAM)-l mRNA expression on the surface of human vascular endothelial cells (HUVECs) induced by LPS stimulation and the effects of hypertonic-hyperoncotic solution (HHS) . Methods HUVECs were enzymatically isolated and cultured in RPMI 1640 culture medium at 37℃ for about 7 days when a monolayer of endothelial cells has grown. The primarily cultured HUVECs were mixed with LPS 100ng/ml and incubated at 37℃ for 30min, 1,4,8, 12and 24 h. 10%NaCl and 10% hydroxyethyl starch (Fresenius) were added to RPMI 1640culture medium. The HHS concentrations were 0.25% and 0.5% respectively. HUVECs were first incubated with either HHS (0.25% , 0.5% ) or isotonic solution for 10 min, 1h and 4h and then stimulated by LPS for 4h. The ICAM-1 mRNA was measured by reverse transcriptase-PCR. Results There was slight expression of ICAM-1 mRNA on the surface of HUVECs in normal condition. ICAM-1 mRNA expression began to increase at 1h exposure to LPS and reached peak value at 4h. Both 0.25% and 0.5% HHS could prevent the LPS-induced ICAM-1 mRNA up-regulation (P

Objective To investigate the effect of hypertonic-hyperoncotic solution (HHS) on CD11b expression on the surface of human neutrophils which are stimulated by lipopolysaccharide (LPS) in vitro. Methods Neutrophils were isolated from fresh peripheral venous blood of healthy volunteers aged 20-4oyr find incubated with LPS 100 ng/ml al 37℃ in 5% CO2 incubator for 15, 30, 60min, 4, 12 or 24h. HHS was prepared with 10%NaCl and 10% hydroxyethyl starch. Neutrophils were incubated with 0.25% or 0.5%HHS for 10min, 1h or 4h. Some of the HHS treated neutrophils were further subjected to LPS stimulation for 30 mm. CDllb on the surface of neutrophils were measured by using immunofluorescence and flow cytometry. Results CD11b expression on neutrophils increased significantly after being exposed to LPS for 15min (P