Prostaglandin F2? ( PGF2? ) in the brain cortex was measured in mice which were devided into 3 groups, ie sham operation group, cerebral ischemia group and reperfusion after cerebral ischemia group, treated with saline or clonidine ( 0 .15~1 .Omg/kg ) , respectively. The results showed that the PGF2? level in the ischemia group treated with saline was higher than sham operation group, but the PGF2? level in reperfusion group was the highest in all groups. Compared with saline, clonidine decreased the PGF2? levels either in the ischemia group or the reperfusion group significantly . This may be useful to attenuate the brain lesion caused by PGF2? .

Objective To evaluate and analyze the effects between with modified Forsus appliance and activator in the treatment of class Ⅱ madibular retrusion.Methods 70 children with class Ⅱ malocclusion and mandibular retrusion were selected and divided into two groups:35 patients treated with this modified Forsus appliance (group A) and other 35 treated with activator (group B).Cephalometric radiographs were taken and analyzed at the pre-treatment time (T0) and the post-treatment time (T1) with the Pancherz analysis.Results The course of treatment was obviously different:the course of group A was (21.4±2.0) months,and group B was (27.3±2.5) months; the treatment course of group A was shorter than that of group B.After treatment,profiles of the two groups were obviously improved.The trends were similar in overjet and the molar relationship,SNB and ANB,with significant differences.But there was no significant difference between the results of the two groups.The change of occlusal plane was notably in group B.Conclusions Both the modified Forsus appliance and activator appliance combined with straight wire appliance can effectively stimulate the mandibular growth,balance the jaw relationship,and correct the class Ⅱ mandibular retrusion.But the modified Forsus appliance can effectively treat the class Ⅱ patients with the shorter course.And the same time,it can take effect continually without depending on the coordination of the patients.

Cobra venom factor (CVF), separated from the cobra venoms, is an acidic glucoproteins with anticomplementory activity. The combination of CVF with factor B in the blood produces a stable C3 and C5 converterase resulting in complement depletion by activating complement continually. There are many studies on it, such as inflammation, autoimmune disease, xenotransplantation, anti-tumor, etc. CVF is also an important tool drug for the study of complement role in the pathophysiological development of diseases.

AIM:To investigate the changes of apelin in blood and myocardium, and the protective mechanisms of ganoderma spores on myocardial ischemia injury induced by isoproterenol in rats. METHODS: The model of myocardial ischemia injury was induced by subcutaneous injection of high dose isoproterenol. Enzyme linked immunosorbent assay (ELISA) was used to measure the apelin contents in blood and myocardium. Semi-quantitative RT-PCR was used to measure the apelin mRNA level in myocardium. Electron microscope was used to observe the pathomorphological changes of myocardium. Ganoderma spores was administered i.g. for 7 weeks. RESULTS: Compared with the normal control group, the apelin contents in blood and myocardium and the apelin mRNA level in myocardium were significantly decreased in the model group (P

Aim To investigate the effects of chloride channel blockers on the apoptosis of RIN-m? cells of pancreatic islet induced by H2O2.Methods The apoptotic model was made by H2O2 exposed for six hours with a concentration of 500 ?mol?L-1.The chloride channel blockers:DIDS,NPPB and NFA were administered to pretreat the samples respectively.The cell viability,morphological changes,and apoptosis rate were observed.Results Chloride channel blockers alone have no marked effects on the cell viability of RIN-m? cell.However,they elevated the cell viability of RIN-m?cell disposed of by H2O2.Compared to H2O2 group,the groups of DIDS +H2O2,NPPB+ H2O2 and NFA+H2O2 have significant difference in cell viability and apoptosis rate(P

Objective: To study the effects of estrogen, progestogen and mifepristone on endometrial carcinoma cell lines in vitro. Methods: The well-differentiated endometrial cancer cell line Ishikawa and moderate-differentiated endometrial cancer cell line Hec-1B were cultured in vitro. The cells were divided into four groups:control, estrogen , estrogen and progestogen , estrogen and progestogen and mifepristone, then we implanted cells in 96-well plates to search the response in distinct hormones. Results: When stimulated by estrogen for 72 hours, the growth of Ishikawa cells was significantly higher than the control, Hec-1B cells only grew higher than the control, but it was no significance in statistics. Progestogen inhibited Ishikawa cells significantly after being stimulating for 72 hours, there was the same effect on Hec-1B cells after being stimulating for 96 hours. On the base of estrogen and progestogen, we added mifepristone,cells developed after 96 hours in Ishikawa cells and cells developed after 48 hours in Hec-1B cells. Conclusion: Estrogen can cause endometrial carcinoma cell growth; progestogen inhibits the hyperplasia induced by estrogen; mifepristone antagonizes the effect of progestogen on cell growth.

Aim To investigate the effects of PGF_(2?) upon glucose-stimulated insulin secretion and the calcium response in NIT-1 beta cells.Methods Using the radioimmunoassay(RIA),the amount of PGF_(2?) augmentation of glucose-stimulated insulin secretion was determined in different conditions and the confocal laser scanning methods by Fluo-3AM as a fluorescent probe were used to analyze the NIT-1 beta cell intracellular calcium response in correlated various terms.Results In the presence of 16.5 mmol?L~(-1) glucose,PGF_(2?)(0.1,1,5 ?mol?L~(-1)) dose-dependently augmented glucose-induced insulin secretion in NIT-1 beta cells,especially at 5 ?mol?L~(-1)(P0.05).Meanwhile,Exposure of the NIT-1 cells to 5 ?mol?L~(-1) PGF_(2?) induced a rapid increase of intracellular calcium(P

Objective:To study the functional differences between the two progestrone receptor isoforms(PR-A and PR-B) in human endometrial cancer,using antisense oligodeoxynucleotide(AS-ODN) to downregulate isoform B of progestrone receptor in endometrial carcinoma cell lines, After transfection of the oligodeoxynucleotide, several kinds of hormones were added in the cells to observe the different response,whereh to study the functional differences between the two isoforms. Methods: The well-differentiated endometrial cancer cell line Ishikawa and moderate-differentiated endometrial cancer cell line Hec-1B were cultrued in vitro. The cells were transfected with antisense, sense, and scramble-ODN. After 48 hours, the expressions of two progesterone receptor isoforms were detected by Western blot using specific antibody. Then the cells were planted in 96-well plates, transfected with antisense, sense, scramble-ODN and added in several hormones to search for the response in distinct hormones and oligodeoxynucleotides. Results: After transfecting antisense-ODN, two cell lines were down-regulated in progesterone receptor isoform B,but progesterone receptor isoform A was not down-regulated,and the progesterone receptor isoform B of cells transfected with sense and scramble-ODN was not changed. When stimulated by 17?-estradiol(E2)for 72 hours,the growth of Ishikawa cells was significantly higher than that of the control, Hec-1B cells only grew higher than control,but it was to significant in statistics.R5020 inhibited Ishikawa cells significantly after stimulating for 72 hours.There was the same effect in Hec-1B cells after stimulating for 96 hours.On the bases of E2 and R5020, we added mifepristone(RU486) .The cells developed after 96 hours in Ishikawa cells and developed after 48 hours in Hec-1B cells. When PR-B was down-regulated,the stimulating effect of E2 was enhanced, but the inhibitory effect of R5020 was de-creased, RU486 antagonized R5020 weaklier than the control. Conclusion: AS-ODN directed against the human PR-B can inhibit the expression of PR-B effectively,through which the PR-A expresses predominantly. E2 can cause endometrial carcinoma cell growth, PR-B is associated with the stimulating effect of E2 in endometrial carcinoma cells. Progestin (R5020) inhibits the hyperplasia induced by E2,PR-B is involved in the inhibitory effect of R5020. RU486 antagonizes the effect of R5020,inhibiting cell growth, PR-B is involved in the antagonizing effect of RU486.

OBJECTIVE To investigate the pathogenic change and bacterial antibiotic resistance in lower respiratory tract infection in inpatients of chronic pulmonary heavt disease(CPHD) for recently 3 years and to provide reference for clinical treatment.METHODS Retrospective analysis was conducted on sputum cultivation from CPHD patients who were hospitalized from Jan 2004 to Dec 2006.RESULTS A total of 772 pathogenic strains were isolated,60.1 % of which were Gram-negative bacilli.Pseudomonas aeruginosa,Klebsiella Pneumoniae,Escherichia coli and Acinetobacter baumannii were the main Gram-negative pathogens.Gram-positive bacilli accounted for 13.7%,most of which were Streptococcus pneumoniae,Staphylococcus aureus and so on.Fungi accounted for 26.2%.Imipenem/cilastatin sodium was the most sensitive drug for P.aeruginosa,Acinebacter and Enterobacteriaceae.And vancomycin hydrochloride was the most for S.aureus.Their multiple drug-resistance to anti-microbial agents was serious.CONCLUSIONS Gram-negative bacteria are the majority of the pathogens from CPHD of lower respiratory tract infection in hospital.The pathogens show multiple drug-resistance in drug sensitive test.It is suggested that there be urgent need for surveillance of bacterial resistance and rational use of anti-microbial agents during the clinical therapy.

AIM To explore the effects and mechanism of cobra venom serum on the proliferation in HL60 cells. METHODS Established the HL60 cells as a target to study the growth feature by the action of cobra venom serum.The agarose gel electrophoresis and flow cytometry analysis were used to demonstrate apoptosis. RESULTS Compared with the control group, the cells were inhibited significantly by the action of cobra venom serum.A characteristic DNA "ladder" was detected by using agarose gel electrophoresis. By flow cytometry analysis,it was proved that most apoptosis of HL60 cells occurred when cultured with cobra venom serum. CONCLUSION Cobra venom serum inhibited the HL60 cells in vitro , which was related to apoptosis. This may introduce a new way to the treatment of leukemia.