By means of DEAE-sephadex A - 50 column chromatography, the venom of Agkistrodon acutus was separated into fifteen fractions. The fraction Ⅱ was rechro-matographed, on sephadex G - 50 column and a single peak was obtained. The polyacrylamide disc gel electrophoresis also showed a single band. The fraction Ⅱ had strong fibrinolytic activity on dog plasma fibrin plate and showed direct fibrinolytic effect on heated fibrin plate. In addition to fibrinolytic activity, the fraction Ⅱ had fibrinogenolytic activity, In vitro and at aconcentration less than 17. 8 mg?L-1,the potency of fibrinolysis was higher than that of fib-rinogenolysis. Local hemorrhage activity which is characteristic for crude venom of Agkistrodon a-cutus was not found when the fraction 1 was injected hyperdermically in rabbit. The ip LD50 value of the purified fraction Ⅱ was determined to be 11. 1 mg ? kg-1 in mice and there was no gross hemorrhage found in the dead animals.

Objective To study the relationship between the changes of actin in cardiac muscle and skeletal myogen cells and postmortem interval in rats.Methods The changes of actin in cardiac muscle and skeletal myogen cells at different postmortem intervals were observed by immunohistochemical S-P method using anti-actin monoclonal antibody (HHF35)and analyzed by IBSA image analysis system.Results Within 54h postmortem,cardiac and skeletal muscles revealed depletion of HHF35 staining.The extent of HHF35-staining depletion increased with extension of postmortem interval.Statistical difference was significant in the data obtained by IBSA image analysis system (F cardiac muscle =588.27,F skeletal muscle =351.25,P

Objective To discover the vital role of Rab27B in tumor cells and its potential molecular mechanism by means of quantitative proteomics analysis of Rab27B knockdown in MHCC97H.Methods The expression of Rab27B in MHCC97H cells was knocked down by the combination of Tet-on advanced inducible expression system and RNA interference technology.Then, proteins extracted from the cells were identified by LC-MS/MS system after FASP digestion and iTRAQ 4-plex labeling. Finally, the properties of differentially expressed proteins, including the subcellular localizations, biological processes and molecular functions, were analyzed by the bioinformatics method.Results There were 448 differentially expressed proteins (|Ratio|>1.21, P<0.05) identified in MHCC97H cells after Rab27B knock-down.The expression levels of 229 or 219 proteins were positively or negatively correlated with Rab27B, respectively. These differentially expressed proteins were mainly involved in vesicle transport, macromolecule localization, cellular response to stimulus.Furthermore, there were 26 differentially expressed proteins participating in 8 tumor-related signal pathways, eleven of which were in the focal adhesion signal pathway.Conclusion The analysis of quantitative proteomics in Rab27B-knockdown MHCC97H cell line by iTRAQ suggests that Rab27B not only has an impact on the exosomal secretion of tumor cells, but also regulates master proteins in signal pathways involved in cell proliferation and migration.

Aim To evaluate the effects of fibrinolytic enzyme FⅡ from agkistrodon acutus venom on an experimental model of kidney thrombus induced by lipopolysaccharide(LPS). Methods The model of microvascular thrombosis in the rabbits kidney was performed by the method of Hermida, which was induced by infusing LPS. Treatments were begun simultaneously with LPS infusion, through the contralateral marginal ear vein. Six different groups were established: NS 10 ml?h~-1 was infused as the negative control group, urokinase ~20 000 IU?kg~-1 ?h~-1 as positive control group, FⅡwas infused with the dosage of 0.1(Low-dose), 0.3 (medium-dose),0.6 (high-dose) mg?kg~-1 ?h~-1 . The further rabbits, which were given neither LPS nor FⅡ, were infused with saline solution through both marginal ear veins. Kinney sections were examined for the presence of fibrin microthrombi. The measurement of FDP concentrations was used to assess the degradation of microvascular thrombosis. Results Intense fibrin deposition was also detected and FDP concentrations were (78.21?4.79)% and (84.27?6.21)% at 2 and 6 hours after LPS administration in LPS-control group. Little fibrin deposition was detected and FDP concentration also increased in urokinase control group. A lot of fibrin deposition was detected in Low-dose FⅡ group,little fibrin deposition was detected in medium-dose FⅡ group, and no fibrin deposition was detected in high-dose FⅡ group. Additional all doses of FⅡ led to a significant increase in FDP concentration as compared with LPS-control group (P

[Objective] To purify and characterize a novel factor X activator,Fve-1 from Daboia russelli siamensis (Myanmar) venom.[ Methods]F V e-1 was purified by ion-exchange chromatography and gel filtration.The hemostatic activity of F V e-1 was determined based on chromogenic substrates.The fibrinogen-clotting activity of F V e-1 was also determined.Thermal stability, pH stability,enzyme activity,and inhibition of F V e- 1 were determined by its remaining procoagulant activity.N-treminal sequence was determined by the method of automated Edman degradation.[ Results ]F V e-1 was achieved by chromatography with a molecular weight of 13,808 and an isoelectric point of 4.6. The hemostatic activity of 0.5 mg Fve-1 was equal to that of 1.5625 u thrombin or that of 54.93 ng RVV X. F V e-1 primarily activated F X, but did not affect on prothrombin and fibrinogen. The suitable pH and temperature range of F V e-1 was 6.5-7.5 and 25-60 ℃,respectively.The activity of F V e-1 was enhanced by Ca2+ and inhibited by EDTA and DTT.The N-terminal sequence of F V e-1 was NH2-N-L-Y-Q-F-G-E-M-I-N.[Conclusion] F V e-1 is a factor X-activating enzyme,which could activate FX to FX a,but have minimal effect on prothrombin and fibrinogen.

OBJECTIVETo evaluate the reliability and accuracy of arcuate fasciculus (AF) navigation for AF localization and reconstruction.

METHODSReconstruction of the AF and assessment of the aphasia quotient (AQ) were performed in 43 cases before and after surgical removal of lesions in the language area of the brain. The minimal distance between the AF and the lesion (D(1)), preoperative AQ (AQ(1)), the minimal distance between the AF and the surgical cavity (D(2)), and the postoperative AQ (AQ(2)) were measured. Linear correlation analysis was conducted between D(1) or D(2) and the corresponding AQ(1) or AQ(2) to assess the relationship between the AF and language function. The language function of each patient was evaluated postoperatively.

RESULTSThe AF was successfully reconstructed in all the cases. The tractography results of the identical AF generated by 3 different users showed good congruency. A positive linear correlation was demonstrated between D(1) and AQ(1) (P<0.001) and between D(2) and AQ(2) (P=0.001). Only two patients (4.7%) showed language deficits at postoperative follow-up.

CONCLUSIONAF navigation is a reliable and accurate technique for AF reconstruction and localization and helps to preserve the language function after surgical removal of lesions in the language area of the brain.

Adolescent ; Adult ; Diffusion Tensor Imaging ; Female ; Humans ; Language Disorders ; diagnosis ; Male ; Middle Aged ; Nerve Fibers ; Neuronavigation ; Reproducibility of Results ; Young Adult

Objective To verify the criteria proposed by National Academy of Clinical Biochemistry(NACB)guidelines in investigating the factors that affect serum TSH determination, and to determine the reference range of serum TSH in iodine-sufficient areas of China. Methods In 2007, 5 348 inhabitants were enrolled from 3 iodine-sufficient areas of Liaoning Province, and were asked to fulfill the questionnaire. Serum TSH, thyroid peroxidase antibody(TPOAb), and thyroglobulin antibody(TgAb)were determined, and thyroid ultrasonography was carried out. Results The distribution of TSH levels was skewed in healthy people and closely fit the curve of Gaussian distribution after logarithmic transformation. The levels of TSH in subjects of 12-19 years of age were significantly higher than those of other age groups(P＜0.01), and no significant difference was found among the latter groups. TSH level in females [(1.68±1.90)mIU/L] was higher than in males[(1.45±1.92)mIU/L, P＜0.01]. The reference range of TSH was 0.43-4.74 mIU/L in males, and 0.48-5.39 mIU/L in females. Family history of thyroid disease, abnormal thyroid ultrasonography, and positive thyroid antibodies were the factors that influenced TSH level. Conclusion The reference range of serum TSH in iodine-sufficient areas of China is established.

Objective To investigate the relationship between serum thyrotrophin(TSH)and dyslipidemia in subclinical hypothyroid and euthyroid subjects. Methods An epidemiological study on diabetes and thyroid diseases was performed in Dadong community, Shenyang city, in 2007. 110 subjects with subclinical hypothyroidism(SCH)and 1 240 euthyroid subjects were enrolled in the study. Neither history of thyroid diseases nor administration of thyroid-related and lipid-regulating medicines were reported in these subjects. The levels of serum thyroid hormones, lipids, fasting plasma glucose(FPG), and insulin were determined. Results (1)Patients with SCH had significantly lower HDL-C levels than those who were euthyroid.(2)According to the guideline of treatment of adult dyslipidemia in China, the lipid profiles were each categorized. Mean TSH levels were higher in subjects in the dyslipidemia subclass than subjects in the normal subclass. The differences were significant in high LDL-C subclass in overweight individuals. In euthyroid overweight women, mean TSH levels were significantly higher in high LDL-C subclass. In the euthyroid population, TSH was positively associated with total cholesterol in overweight population. The association was not modified by the homestasis model assessment for insulin resistance(HOMA-IR)values.(3)TSH was associated positively with serum triglycerides and negatively with serum HDL-C in women. TSH was positively associated with total cholesterol in overweight population and positively associated with total cholesterol and LDL-C in overweight women after adjustment for age, sex, and body mass index. Conclusion Raised serum TSH seems to be a risk factor of dyslipidemia in subclinical hypothyroid and euthyroid subjects, which is independent of insulin sensitivity.

Objective To explore the relationship between serum thyrotropin and the components of metabolic syndrome.Methods A total of 1534 adult inhabitants in Dadong district of Shenyang were asked to fulfill the questionnaires and have physical examination and oral glucose tolerance test(OGTT).The vein blood was drawn to measure thyrotropin(TSH),fasting plasma glucose(FPG),OGTT 2hPG,fasting insulin,triglyceride(TG) and high density lipoprotein cholesterol(HDL-C).Results Serum TSH in the MS group was higher than in the Non-MS group(2.54 vs 2.22 mU/L,P

Objective:To explore the value of the age, atrial fibrillation, dysphagia, sex, stroke severity (A2DS2) score, the prestroke independence, sex, age, National Institutes of Health stroke scale (ISAN) score, acute ischemic stroke-associated pneumonia score (AIS-APS), and intracerebral hemorrhage associated pneumonia score without hematoma volume included (ICH-APS-A) in predicting risk of stroke-associated pneumonia (SAP).Methods:From January to June 2019, 304 patients with acute stroke who were hospitalized in the Lianyungang Hospital Affiliated to Xuzhou Medical University were analyzed retrospectively. There were 164 patients with acute ischemic stroke (AIS), including 82 patients with SAP. And there were 140 patients with intracerebral hemorrhage (ICH), including 70 patients with SAP. They were divided into SAP group (152 cases) and non-SAP group (152 cases) depending on whether they had SAP. The area under the receiver operating characteristic curve (AUC) was used to compare the predictive value of the four scores.Results:When predicting risk of SAP in patients with the stroke, the A2DS2 score had the largest AUC compared to the ISAN score, AIS-APS score, and ICH-APS-A score. When predicting risk of SAP in patients with AIS, the AUC (0.875, 95% CI 0.815 to 0.922) of the A2DS2 score was greater than the AIS-APS score and the ISAN score. When predicting risk of SAP in patients with ICH, the AUC (0.950, 95% CI 0.900 to 0.980) of the A2DS2 score was greater than the ICH-APS-A score and the ISAN score. When predicting risk of SAP in patients with AIS and ICH: 0.911 (95% CI 0.873 to 0.94) vs. 0.882 (95% CI 0.840 to 0.916), Z = 2.319, P = 0.020, the A2DS2 score was significantly better than the ISAN score ( P<0.05). When predicting risk of SAP in patients with AIS, the A2DS2 score, ISAN score, and AIS-APS score all have good predictive value ( P>0.05). When predicting SAP in patients with ICH, the A2DS2 score, ISAN score, and ICH-APS-A score all have good predictive value ( P>0.05). Conclusions:When predicting risk of SAP in patients, the A2DS2 score is a reliable prediction tool, with good predictive value.