Objective To explore the change of platelet activation before and after stent implantation in acute coronary syndrome. Methods Detection of positive expression of platelet membrane glycoprotein CD62p,CD63 and thrombin-sensitive protein (TSP) were performed using flow cytometry (FCM) in 82 patients which included 45 unstable angina pectoris (UAP) and 37 acute myocardial infarction (AMI). Another 45 angiographically normal patients served as the control. Results Expression of CD62p, CD63 and TSP after stent implantation in ACS group. On the other hand, the expression of the above factors was higher in ACS group compared with the control group. Conclusion Acute thrombogenesis induced by platelet activation is a basic pathophysiologic process in ACS. Endothelial injury and plaque rupture produced by stent implantation may be a cause of platelet activation.

Objective To investigate the relationship between tumor necrosis factor-α (TNF-α) in ischemic brain tissue and bran edema after cerebral ischemia-reperfusion in rats.Methods Eighty four male SD rats were randomly assigned to either a cerebral ischemia reperfusion group (n =44) or a sham-operation group (n =40). A model of middle cerebral artery occlusion for 120 minutes followed by reperfusion was induced in rats using the suture method. The infarct size was determined by 2, 3, 5-triphenyi terazoloride (TTC) staining at 6 h,24 h, 3 d, and 7 d respectively after the reperfusion. Dry-wet weight method was used to measure brain water content and evaluate the extent of brain edema. The enzyme-linked immunosorbent assay (ELISA) was used to detect the concentration of TNF-α in ischemic brain tissue. Results TNF-α level in ischemic brain tissue was increased at 6 h (445.8 ±91.7 pg/ml) after the reperfusion, and reached the peak at day 3 (715.5 ±121.3 pg/ml). There were significant differences compared to the sham-operation group and other time points (all P＜0.001). After that, it was decreased gradually, but it was still higher than that in the shamoperation group at day 7 (478.1 ± 145.5 pg/ml vs. 148.5 ± 101.7 pg/ml, P＜0.005). The initial change of the water content in brain tissue lagged behind the increased TNF-α. It did not increase significantly until 24 h after cerebral ischemia-reperfusion (P ＜0.001). It reached the peak at day 3 (P ＜0.001), and it was still higher than that in the control group at day 7 (P ＜0.05). The evolution of cerebral infarct volume was in accordance with the changes of TNF-α level. Conclusions TNF-α is associated with the changes of brain edema and infarct volume,and it is harmful to brain tissue.

OBJECTIVE: To optimize the technology of extracting total flavonoids from Sophora japonica.METHODS: The extracting technology of total flavonoids (from Sophora japonica) was optimized by response surface methodology(RSM) with ethanol concentration,solid-solvent ratio,extracting temperature,extracting time and extracting times as factors and the yield of total flavonoids as index.RESULTS: The optimal parameters were determined as follows: the ethanol concentration was 60%;the solid-solvent ratio was 1∶10;the extracting was conducted for 1 time(90 min) at 90 ℃.CONCLUSION:The optimized extraction technology was simple and stable and which serves as references for industrial large scale production.

Objective　To study the changes of hemodynamics during heterotopic partial liver transplantation (HPLT) in pigs. Methods　10 young pigs after intravenous anesthesia were divided into two groups: donor group (5 pigs) and recipient group (5 pigs). In recipient pigs, a catheter inserted to right cervical artery was used to monitor artery bood pressue, and Swasn-Ganz catheter inserted via right cervical vein was used to monitor hemodynamics during operation.Results　There were significant changes in CO, SV and SVR (P<0.01 or P<0.05); although decreasing in MAP and increasing in HR occurred during operation, but no significance(P>0.05) was found. There were no significant changes in PCWP and PAP during HPLT (P>0.05). Conclusions　There is significant hemodynamic fluctuation during HPLT. It is very important that to monitor hemodynamics, prevent and manage hemodynamics disturbance durig HPLT

0.05). Conclusions There is significant hemodynamic fluctuation during HPLT. It is very important that to monitor hemodynamics, prevent and manage hemodynamics disturbance durig HPLT

Objective To investigate the mechanism of protective effects of 17-β estradiol on the experimental model of spinal cord injury (SCI) rats.Methods First,the primary astrocytes were cultured and identified.When the third generation astrocytes were cultured,they were induced by H202 whose concentrations were established by the method of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT).The cells were randomly divided into five groups:control group; the group of treatment with 400 μmol/L H2O2 for 24 hours; the group of treatment with 20 nmol/L estrogen for 2 hours prior to exposure to 400 μmol/L H2O2 for 24 hours; the group of treatment with 20 nmol/L estrogen for 26 hours and the group of treatment with dimethyl sulfoxide for 26 hours.The proteins which were extracted from these cells after treatments with H2O2 for 24 hours were detected by Western blotting.Results The absorbances of the astrocytes of treatments with H2O2 were reduced( q' =-11.45,P =0.001 ).But exposure to estrogen prior to exposure to H2O2 provided partial restoration of the absorbances (q' =7.025,P =0.0025 ).The absorbances of the astrocytes among different groups showed significant differences( F =69.69,P =0.0025 ).The results suggested that estrogen might increase the cell viability in astrocytes.Compared with the group of treatment cells with H2O2,treatment cells with 17-β estradiol prior to H2O2 exposure down-regulated the expressions of both phosphatase and tensin homologue deleted on chromosome 10 ( PTEN ) ( F =290.003,P =0.001 ) and caspase-3 ( F =46.158,P =0.023 ).And,17-β estradiol treatment of cells increased the levels of p-Akt ( F =49.173,P =0.033 ) and Bcl-2 ( F =115.916,P =0.001 ) when compared with the group of treatment astrocytes with H2O2.Conclusion These findings suggest that the attenuation of PTEN expression mediated by estrogen is associated with an increase in phosphorylation/activation of the Akt and the Bel-2 expressions.These results suggest that the protective effects of 17-β estradiol on the experimental model of SCI rats may depend on the estrogen protection to the astrocytes which may be mediated by decreasing the PTEN expression.

Objective To analysis the MRI features of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), to improve the understanding of MRI manifestations of this disease. Meth?ods The clinical manifestations, neuroimaging analysis and genetic analysis were performed in the CADASIL pedigree proband and his families. Results Five of six cases were confirmed with C2182T mutation on exon 14 of the NOTCH3, of which three cases were diagnosed by MRI. Brain MRI findings included bilateral symmetric distributed confluent lesions in the subcortical and periventricular white matter in the frontal lobe, hypointensity on T1WI and hyperintensity on both T2WI and T2 FLAIR imaging in four cases. The external capsule was involved in three cases, with hyperintensity on T2WI. Subcortical lacunar lesions (SLLs) were shown in three cases. Lacunar infarction in the basal ganglia and thalamus were presented in four cases. T2WI hyperintensity at the brain stem was found in two cases. Cerebral microbleeds were re?vealed in three cases. There was no O’Sullivan sign in all the six cases. Conclusions There is characteristic change of MRI in CADASIL patients, which may play a very important role in screening these cases.

Objective:To investigate the diagnostic value of MRI and CT for the liver space-occupying lesions.Methods:The clinical data of 70 cases of patients with liver space-occupying lesions in our hospital from June 2012 to May 2016 were divided into two groups and retrospectively analyzed.35 cases underwent contrast enhanced ct scans (CT group),and others underwent dynamic contrast-enhanced MR imaging(MRI group).The pathological diagnosis,number of lesions and lesions diameter were ompared between two groups.Results:No significant difference was found in the pathological diagnosis,number of lesions(71 vs 70) and lesions diameter(2.25 ± 2.01 cm vs 2.19± 1.98 cm) between two groups(P＞0.05).As the gold standard by pathological diagnosis results,correct diagnostic rate of MRIgroup were 85.71％,which was 77.14％ CT group and lower than that of the MRI group,but no significant difference was found between two groups (P＞0.05).The incidence of adverse reactions in CT group was significantly higher than that of the MRI group (P＞0.05).Conelusion:Both CT and MRI enhancement scanning have higher diagnostic value for the liver space-occupying lesions,but MRI enhancement scanning has higher safety and tolerability.

Objective To explore the association between 1425G/A single nucleotide polymorphism(SNP)of protein kinase Cη gene(PRKCH)and cerebral infarction in Jiangsu Han population.Methods 255 patients with cerebral infarction and 225 controls were recruited in our case-control study.The 1425G/A in PRKCH gene was detected by direct sequencing of PCR products.Data were coded and entered in SPSS Windows(version 13.0).Results The frequencies of the GA+AA genotypes(56.86%)and A allele (36.27%)in cerebral infarct group were significantly higher than those in control group(44.44%and24.67%.χ2=7.377,P=0.007 and χ2=15.104,P<0.01).Further analysis indicated that the genotypes(63.09%)and alleles(40.27%)frequencies were statistically different between lacunar infarction subtype and controls(44.44%and 24.67%;χ2=11.744,P=0.Ol and χ2=20.445,P<0.01).Logistic regression analysis revealed that hypertension,diabetes mellitus.hyperlipidemia and the A allele of 1425G/A polymorphism were independent risky factors for lacunar infarction.Conclusions The SNP 1425G/A in PRKCH is closely associated with cerebral infarction.particularly with lacunar infarction.

Objective To explore the effect of posterolateral combined with posteromedial approach in patients with posterior Pilon fracture. Methods The clinical data of 16 posterior Pilon fracture patients who had underwent posterolateral combined with posteromedial approach treatment from June 2014 to December 2016 were retrospectively analyzed. Results The patients were followed up for 12 to 18 months (average 14 months). There were no complications of incision infection, skin necrosis and nerve damage. All the fractures were healed. The fracture healing time was 12 to 24 weeks (average 16 weeks), and no loosening or breakage of the implant was observed. Claw toes deformity occurred in 1 case 6 months after surgery, and the symptom improved after tendon lengthening surgery. According to American Orthopedic Foot and Ankle Society (AOFAS) scoring system, the results of ankle function were excellent in 8 cases, good in 5 cases, and fair in 3 cases. Conclusions The posterolateral combined with posteromedial approach for treatment of posterior Pilon fracture can achieve satisfactory clinic effects because it has many advantages such as good exposure, easy reduction and fixation, less invasion of soft tissue and so on.