The latest literatures showed that the anti-platelet aggregation drugs had a good application in cardiovascular disease, however still with hemorrhage side effects and some new drugs' mechanism was unknown. So further investigations on the mechanism of anti-platelet aggregation are necessary to discover a new type of anti-platelet drugs, such as antagonists of the EP3 receptor.

ObjectiveTo study the effects of Morroniside on platelet aggregation in rabbits induced by Adenosine diphosphate (ADP), Arachidonic acid (AA), Platelet activating factor (PAF). MethodsThe platelet aggregation was determined by Born's method. ResultsCompared with the controls, Morroniside inhibited platelet aggregation induced by ADP, AA, PAF （P<0.001）and especially selective on ADP. ConclusionMorroniside inhibited platelet aggregation in rabbits, especially induced by ADP.

Objective To form the basis of establishing a strategy for safe blood donor recruitment and to identify and subdivide the structures of donors.Methods Demographic data of blood donors, and blood testing results of HBsAg, anti-HCV, anti-HIV, and syphilis, from Nov. 2004 to Jun. 2005, were collected and analyzed.Results Among the 45270 voluntary blood donors, the total positive test rate were 3.11%, which was related to age, level of education and occupation of blood donors. About 76.7% of donors were young people, aged from 18 to 30. As the age increased, female donors were less than male ones. Among all the donors, 81.6% received higher education, which had lower positive test rate than those with lower level of education. Among the 45270 donors, farmers had the highest positive test rate; workers and service people came the second; students and medical staff had the lowest. As to donors with incomplete record, the positive test rate was higher than those with complete record.Conclusion During blood donor recruitment, quality control is important. People younger than 30, with student or higher education background, are relatively safe to recruit.

Objective To investigate the blood collection and supply in Chengdu,from 2000 to 2006,and also to analyze its development tendency.Methods The volume of blood collection,blood component preparation,the positive rate of blood screening,the volume of clinical consumption,as well as the population statistics and bed numbers in medical institutions and hospitals,from 2000 to 2006,were reviewed.Correlation and coefficient of regression were used for the statistical analysis.Results The annual average rate of growth(AARG) of blood collection and supply is 17.74%.The rate of RBC separation increased from 27.4%% to 84.55%,and the AARG of platelet apheresis product was 38.00%.Blood components had become much more popular than whole blood in clinical application.There was a good linearity correlation between the blood provision and the population statistics(?=0.997,P

Objective To find out factors influencing voluntary blood donation activities and establish the most appropriate method for recruiting blood donors. Methods Questionnaire investigation of donors and data analysis by SPSS+ software. Results In Chengdu city, 2385 residents' knowledge on nonrenumerated blood donation was as follows: among the 2385 residents, the percentage of people who knew the government policies of blood donation was high (87.5%), but the percentage having common knowledge of blood donation was only 29.4%, of risk behavior was 32.5%. Among the 1349 participants who had donated blood, the percentages having common knowledge of blood donation and risk behavior were 33.4% and 38.1% respectively, compared to the 1036 participants who never donated (24.2% and 25.1%, respectively)(P

Aim To the investigate the protective effect of ginsenoside Rg1 in Alzheimer's disease ( AD)-like neurotoxicity model induced by okadaic acid ( OKA) in the cellular level , and explore the mecha-nism preliminarily. Methods The PC12 cells model, simulate neurons, induced by OKA was given Rg1 (1, 5,10 μmol·L-1), and melatonin (Melat) 10 μmol· L-1 was given as a positive control. MTT and LDH were carried out to assess the cell viability and mortality. To detect the accumulation of ROS, the DCFH-DA fluores-cent probe was conducted. And to assess the change of the activity of a variety of antioxidant enzymes, various kits were used, including ABTS、CAT、SOD、GSH-Px and GSSG/GSH. Results Compared with the control group, the survival rate of PC12 cell in OKA group re-duces significantly, the mortality rate was increased sig-nificantly , the number of early apoptotic cells was in-creased significantly (P<0. 01). Oxidative stress-relat-ed indicators show that ROS accumulation within the cells of OKA group increases significantly ( P<0. 01 ) , and the total antioxidant capacity ( ABTS ) decreases significantly ( P < 0. 01 ) , the activity of peroxidase (Catalase, CAT) (P <0. 01), glutathione peroxidase (glutathione peroxidase, GSH-Px) and superoxide dis-mutase ( superoxide dismutase, SOD) decreased signifi-cantly ( P <0. 05 ) , the rate of GSSG/GSH increased significantly ( P <0. 01 ) . Compared with the model group, the different doses of Rg1 could improve the sur-vival rate and decrease the mortality rate of PC12 cell significantly in the group of OKA, and could decrease the level of the accumulation of ROS, improve the activ-ity of antioxidant enzymes. Conclusion Ginsenoside Rg1 can decrease PC12 cell apoptosis by exerting an-tioxidant effects, and protect the nerve cells in AD-like pathology model induced by OKA.

Abstract:Aim To study the effect of rotenone on α-synuclein in rat midbrain of Parkinson's disease(PD).Methods Rats were subcutaneouly injected with chronic low dose rotenone(1.0 mg·kg~(-1)·d~(-1)).Movements within 5 minutes were evaluated in open field test.Tyrosine hydroxylase(TH)-positive neuronsin the midbrain were measured with immunofluorescence staining.α-SYN protein level in the midbrain was demonstrated with immunohistochemical staining and Western blot.Results Compared to the control group,latency time,crossing,rearing and rearing time were changed significantly(P<0.05,0.01)in the rotenone group,TH-positive neurons were reduced(P<0.05)and α-SYN protein level in the midbrain was increased(P<0.05).Conclusion Injection with rotenone can induce PD symptom,which may be correlated to α-SYN protein level in the midbrain.

Aim To investigate the role of chemokine-like factor 1 ( CKLF1 ) in SH-SY5 Y cell migration and its molecular regulatory mechanism. Methods SH-SY5Y cells were stimulated with CKLF1 for 0. 5 h, 2 h, 8 h and 24 h, respectively. The migration distance and the percentage of migration cells were recorded by CELLocate analysis. The phosphorylation of focal ad-hesion kinase ( FAK) at Tyr-397 site was detected by Western blot analysis. By chemotaxis assays, we con-firmed the chemotaxis of CKLF1. Furthermore, FAK inhibitor PF-573228 and PLCγ inhibitor U73122 were used for the research of molecular regulatory mecha-nisms involved. Results CKLF1 promoted cell migra-tion and induced a strong increase in the phosphoryla-tion level of FAK-pY397 , which were significantly at-tenuated by the presence of U73122 ( a specific inhibi-tor for PLCγ) . In addition, the chemotaxis of CKLF1 was obviously blocked by the FAK inhibitor PF-573228 . Conclusion CKLF1 induces SH-SY5 Y cell migration via PLCγ/FAK signaling pathway.

Objective To investigate the regulation of IFN-γ to Th17 response in Chlamydia muridarum (Cm) lung infection in mice. Methods A murine model of pneumonia induced by intranasal inoculation of Cm was used for this study. Anti-mouse IFN-γ McAbs were used to neutralize endogenous IFN-γfollowing Cm lung infection. Control group received the same dose of isotype antibody (IgG2a). Mice were sacrificed at day 7 postinfection. Chlamydial growth in the lung was assessed by immunoenzyme technique.IL-17 and IL-23 mRNA expression in the lung was assayed by RT-PCR and the proliferation of IL-17 + CD4 +T cells in the spleen was assayed by intracellular cytokine staining. Results IFN-γ-neutralized mice exhibited serious disease course, include greater body weight loss, higher organism growth and much more severe pathological changes in the lung compared with control mice. The mRNA expression of IL-17 and IL-23 in the lung and the proliferation of IL-17 + CD4 + T cells in the spleen significantly decreased in the IL-17- neutralized mice. Conclusion IFN-γ was protective in Cm lung infection through up-regulating the antigen specific Th17 responses.

Objective To explore the effects of morroniside on platelet aggregation induced by adenosine diphosphate (ADP) in focal cerebral ischemia/reperfusion in rats. Methods 48 Sprague-Dawley rats were randomly divided into sham group, model group, morroniside dose groups (30 mg/kg, 90 mg/kg, 270 mg/kg) and acetyl salicilic acid (ASA) group (10 mg/kg). The model of middle cerebral artery occlusion (MCAO) was established in all rats except the sham group. Born's turbidimetry was used to measure platelet aggregation rate in rats of MCAO model (in vivo). Results Compared with the model group, the platelet aggregation decreased significantly in the morroniside high dose group (P<0.001). Conclusion Morroniside has the effect of anti-platelet aggregation in focal cerebral ischemia/reperfusion in rats.