Objective To study the dissociation of EDTA-dependent pseudo platelet aggregation by amikacin and to clarify the potential mechanism.Methods At different time points,two concentrations of amikacin (6.5 mg/ml and 10.0 mg/ml) were respectively added to EDTA-K2 anti-coagulated whole blood samples collected from two subjects with EDTA-dependent pseudothrombocytopenia.The aggregated-platelet dissociation was investigated by platelet count and microscopical examination.CD41,CD61,CD62p,PAC-1,and IgG on the platelets of the two patients and of a normal control were determined by the FCS under various conditions.Results When amikacin (6.5 mg/ml) was added within 1 hour after blood collection,it dissociated the EDTA induced platelet aggregation and the platelet counts returned to the normal level. The expression of CD62p,PAC-1,and PA-IgG on the platelets was decreased,yet the expression of CD41 and CD61 had no change.Conclusion Amikacin supplementation (6.5 mg/ml) within 1 hour after blood sampling may dissociate the aggregated platelets caused by EDTA. The mechanism may be associated that amikacin might inhibit the expression of CD62p,PAC-1,and PA-IgG on platelets. The amikacin supplementation would be an inexpensive,effective,and practical method to solve the platelet aggregation induced by EDTA.

Objective To investigate neural correlates of the generation,execution and inhibition of motor intention. Methods Behavioral performance and event-related potentials (ERP) of 14 participants were recorded when they performed a two-staged Go-Nogo task. At the stage of intention preparation,three kinds of the "what" cues were presented separately to the participants : (1) to press a response key by the left or the right hand (the instructed) ,(2) to decide freely which hand will be used (the free) ,(3) to wait for the second cue (the control). At the stage of intention execution,the "whether" cue suggested the participants execute (Go) or withdraw (Nogo) the previous intention either voluntarily or forcedly. Results The interaction effect between the "what" and the "whether" was significant(F(2,26) = 8.262, P=0.002). The forced responses were faster than those of voluntary action under both the instructed condition ((468.52 ±105.87)ms vs (546.67 ±146.33)ms) and the control condition ((536.78 ± 83.28) ms vs (589.75 ± 140.80) ms). No significant difference was found for the free condition((538.71 ± 127. 39) ms vs (561. 44 ± 146. 51) ms). At the stage of intention preparation,significant ERP effects between the instructed intention and the freely intention were revealed in bilateral frontal regions (150～200 ms) , frontoparietal area (300～700 ms)and right temporal area. At the stage of intention execution,ERP effects between voluntary inhibition and voluntary action were observed in left prefrontal area (160～220 ms) ,fro-nto-cento-parietal area and right frontoparietal area. (300～550 ms). Conclusion The motor intention may be generated in the prefrontal area and maintained in the frontoparietal network. The left prefrontal and fronto-centro-parietal areas inhibit intention in the early stage and the right frontoparietal area involves response inhibition lately.

Objective To investigate neural correlates of the retrieval of temporal order.Methods ERP of 19 channels was recorded from 17 healthy young students while they performed a recency judgment task,a recognition task and a visual discrimination task separately,which were based on Sternberg paradigm.One-way ANOVA of repeated-measurement and post-hoc paired comparisons were carried out for both the task factor(temporal order,recognition and control)and the temporal distance factor correspondingly.The latter contains 3 intervals (1,2 and 3)between the targets.Results The temporal distance effect was significant:the closer targets correspond to longer reaction time((745.5±106.1)ms,(711.7±102.2)ms,(653.7±81.5)ms;F_((1.28,20.48))=43.37,P=0.00]and higher error rate((62.8±7.0)%,(72.5±5.4)%,(84.5±6.4)%;F_((1.32,21.11))=135.99,P=0.00].Significant behavioral effect of the task factor was also found for both reaction time(F_((1.32,21.11))=135.99,P=0.00)and error rate(F_((2,32))=200.31,P=0.00).No significant behavioral difference was found between the temporal order group and the recognition group.The spatiotemporal pattern of statistical parametric mapping(SPM)suggested the ERP effects of temporal order were presented in left temporal region (260～270 ms),bilateral parietal-occipital areas(280～290 ms),and bilateral parietal lobes(300～400 ms)prominently.No ERP effect was found between the temporal order task and the recognition task.Conclusions The neural correlates of the temporal distance effect exist in bilateral parietal regions.Temporal order as well as object information processing involves similar cerebral regions during the retrieval period.

Objective To evaluate biomechanical properties of self-designed polyaxial self-locking anatomical plate so as to offer scientific evidence for clinical application.Methods According to anatomic characteristics of distal tibiae of domestic people,a polyaxial self-locking anatomical plate for distal tibia was designed.Six paired ( left,right) fresh cadaver tibial specimens were used to make fracture fixation models and were divided into groups A and B,six specimens per group.Common anatomical locking plates were assembled in group A and polyaxial self-locking anatomical plates were assembled in group B.The biomechanical tests were performed by using 858 Mini Bionix testing machine.Non-destructive tests were performed in both groups,including axial loading,4-point bending and torsional loading and the stiffness of the two fixation instruments was compared.SPSS 13.0 software was used for statistical analysis.Results Polyaxial self-locking anatomical plate was fit for the morphology of distal tibiae.The self-designed pelyaxial plate could increase angular regulation amplitude for the locking screw up to 30°.Compression stiffness was (557.53 ± 20.72) N/mm in group A and (562.80 ± 28.26 ) N/mm in group B.Four-point bending stiffness was ( 268.02 ± 36.77) N/mm in group A and ( 265.76 ± 27.21 ) N/mm in group B.Torsional stiffness was (0.28 ±0.01) Nm/deg in group A and (0.29 ±0.02) Nm/deg in group B.The three tests in two groups showed no statistical significance ( P ＞ 0.05 ).Conclusions The self-designed polyaxial self-locking anatomical plate of distal tibia is fit for the tibial morphology of domestic people.Its biomechanical properties are equivalent to those of common anatomical locking plate,which can meet the needs for clinical application.

【Objective】To investigate the influence of acupuncture on the power of brain electrical activity mapping(BEAM) and hippocampal amino acid neurotransmitters in acute epilepsy rats.【Methods】Forty SD rats were randomized into groups A(normal),B(model),C(treated with acupuncture) and D(treated with sodium valproate).Group C was pretreated with acupuncture on acupoints of Dazhui and Fenglong and with needling through Ganshu toward Danshu.Group D was pretreated with sodium valproate by gastric gavage.The treatment in groups C and D lasted 3 days.Except group A,the mice in other 3 groups received intraperitoneal injection of sodium penicillin to induce acute epilepsy.Within seventy to eighty-five minutes after modeling,different frequency-band power of BEAM in rat brain middle Pz region was detected,and rats hippocampal contents of excitatory amino acids such as glutamic acid(Glu) and aspartic acid(ASP) as well as inhibitory amino acids such as gamma-aminobutyric acid(GABA),glycine(Gly),alanine(Ala) and taurine(Tau) were examined.【Results】Power of frequency band ?,?,?_1,?_2,?_1 and ?_2 in group B increased(P

Objective To observe the cardiac function in acute brain injury patients(ABI)and the relationship between ABI and plasma neuropeptideY(NPY),and to inspect the mechanism and find the evidences for preventing cardiac impairment caused by ABI. Methods 89 patients with acute brain injury within 24 hours after the injury were divided into severe group(n =47)and mild group(n = 42)according to Glasgow Coma Scale(GCS),and 35 normal healthy adults were selected as control group.In 24 hours and 72 hours after the brain injury,all patients were examined with echocardiography to observe cardiac structure,Doppler blood flow velocity and cardiac function,and in the same time the plasma NPY were determined by radioimmunoassay.Then the results were compared with controls. Results The parameters of cardiac function such as EF、 SV.AV、CO、CI had statistical change in 24 hours and 72hours after the brain injury between severe ABI group and mild ABI group,and it also had statistical change between severe ABI group and control group(all P <0.05),but no statistical change between mild ABI group and control group(all P ＜0.05).The level of plasma NPY in ABI patients was significantly higher than that before injury,there was statistically different change between severe ABI group and mild ABI group,and it also had statistical change between severe ABI group and control group(all P＜0.05).The parameters of cardiac function was negatively correlated with the rise of plasma NPY by pearson correlation analysis(EF:r =- 0.79,P <0.01; SV:r =- 0.71,P <0.01;AV:r=-0.67,P ＜0.01 ;E/A:r =-0.63,all P ＜0.01)and(CO:r =- 0.32,P ＜0.05;CI:r =-0.35,all P ＜0.05). Conclusion The parameters of cardiac function were significantly decreased in the patients with acute brain injury,and it was closely related with the level of plasma NPY.

To investigate the prevalence of mental health problems in male violent offenders of Hunan and Sichuan Provinces; and to compare the types and severity of problems between the violent and nonviolent offenders.Methods:Ninety-one violent juvenile offenders and 64 nonviolent juvenile offenders in the juvenile detention centers of Hunan,and 81 violent juvenile offenders in the juvenile detention centers of Sichuan; 39 high school students from a middle school of Hunan Province and 49 from a middle school of Sichuan Province were investigated using the Investigation Screening Inventory for Child Mental Disorder and the Kiddy Schedule for Affective Diseases and Schizophrenia (K-SADS-PL),and classified according to the Diagnostic and Statistical Manual of Mental Disorders.Results:In the Hunan violent group,86.6％ met the criterion of conduct disorder (CD),17.6％ of substance abuse,9.9％ of substance dependence,while in the Hunan nonviolent group,75.0％ met the criterion of CD,and 11.7％ of substance abuse; these were all significantly higher than those of the control group (P＜0.05).In the Sichuan violent group,17.3％ met the criterion of attention deficit/hyperactivity disorder (ADHD),18.5％ of oppositional defiant disorder (ODD),69.1％of CD,and 22.2％ of substance abuse; these were all significantly higher than those of the Sichuan control group.Moreover,63.7％ of Hunan-violent,55.6％ of Sichuan-violent,and 45.0％ of Hunannonviolent offenders had a previous offence records.Conclusion:Mental and behavioral disorders among delinquent youth is becoming a serious problem,and there is an urgent need to develop and implement effective assessment and treatment approaches for juvenile offenders with the aim of reducing offence and recidivism in this population.

Objective: To investigate the recurrence of pulmonary tuberculosis patients 5 years after successful treatment in Hengyang City, Hunan Province, and to analyze its influencing factors. Methods: The data of pulmonary tuberculosis patients who were successfully treated in Hengyang City in 2014 were collected through the tuberculosis management information system. The recurrence of pulmonary tuberculosis was defined as the endpoint, and all patients were observed for five consecutive years. Factors affecting recurrence of pulmonary tuberculosis were identified using Kaplan-Meier estimates, log-rank test and multivariable Cox proportional hazards regression analysis. Results: A total of 6 626 patients with successfully treated pulmonary tuberculosis were included, including 4 961 males and 1 665 females, with a median age of 54 years. There were 536 cases with recurrence of pulmonary tuberculosis within five years, with a 8.09% cumulative proportion of recurrence and annual recurrence rate of 1.75 per 100 person-years. Multivariable Cox proportional hazards regression analysis showed that men ( HR=1.592, 95%CI: 1.256-2.019 ), age of 40 years and greater ( age of 40 to 59 years, HR=7.025, 95%CI: 1.739-28.377; age of 60 years and greater, HR=8.175, 95%CI: 2.024-33.023), farmers ( HR=1.379, 95%CI: 1.070-1.778 ), retreatment ( HR=6.398, 95%CI: 5.163-7.929 ) and positive etiology ( HR=1.255, 95%CI: 1.042-1.511 ) were risk factors for five-year recurrence of pulmonary tuberculosis among successfully-treated patients. Conclusions High recurrence rate is found among pulmonary tuberculosis patients within five years after successful treatment in Hengyang City. There is a high risk of pulmonary tuberculosis recurrence among male, etiologically positive, retreated farmers at ages of 40 years and older, and targeted interventions are recommended.

AIM:To explore the effects of decorin on procollagen type I (PcI), mRNA expression,collagen type I synthesis and proliferation of synovial type B cells of stiff knee joint synovial membrane.METHODS:Type B cells of synovial membrane were isolated from the stiff knee joint synovial membrane and cultured in vitro.The cells were treated with decorin at concentrations of 0.1 mg/L, 5 mg/L and 10 mg/L.After cultured for 24 h, 48 h and 72 h, the cell proli-feration rates were measured by MTT colorimetric determination.Cell cycle distribution and apoptosis were analyzed by flow cytometry.The mRNA level of Pc I was detected by RT-PCR, while collagen type I was measured by Western blot.RE-SULTS:The proliferation of synovial type B cells was significantly inhibited, the percentage of synovial type B cells at G1 phase was significantly increased by 5 mg/L and 10 mg/L decorin (P<0.05), and PcⅠmRNA expression and collagen type I synthesis were significantly decreased.The cells with late apoptosis were not found in control group and experimental groups.CONCLUSION:Recombinant human decorin inhibits synovial type B cell proliferation and decreases PcⅠmRNA expression and collagen type I synthesis in synovial type B cells of stiff knee joint synovial membrane in vitro, suggesting that decorin potentially contributes to the therapy of human knee stiffness.

Objective To explore the monitoring of cerebrospinal fluid (CSF) dynamics in a model of brain herniation induced by acute intracranial hypertension in Guangxi Bama-Mini pigs by phasecontrast cine magnetic resonance imaging (PC cine MRI).Methods Femoral artery blood were extracted from 10 pigs,and injected into the frontal and temporal parietal lobe to make a model of brain herniation induced by acute intracranial hypertension.The mean arterial blood pressure (MAP),intracranial pressure (ICP),and cerebral perfusion pressure (CPP) were monitored.Routine T1WI,T2WI,coronal,sagittal and cerebrospinal fluid flow sequence (fast PC cine slice) which positioned on the cervical 3 (C3) vertebral body as the center and perpendicular to the spinal scans were performed on all experimental animals before and after blood injection with 3.0T Magnetic Resonance Imaging.The ICP,MAP,CPP,the absolute values of CSF peak flow velocity and the absolute value of carotid peak flow velocity before and after blood injection were compared.Results The ICP,MAP,CPP,and the absolute value of CSF peak flow velocity before injection of autologous arterial blood were statistically significant as compared with those after blood injection [(6.80±2.044) mmHg vs (52.20±1.619) mmHg,(76.80±7.068) mmHg vs (142.80±12.399) mmHg,(70.00±6.074) mmHg vs (90.50±12.250) mmHg,and the absolute value of CSF peak flow velocity was (243.20±77.671) mm/s vs (201.40±55.482) mm/s,respectively,P＜0.01].The absolute value of the peak velocity of the carotid artery before blood injection was not statistically significant compared with that after blood injection [(876.80±239.908) mm/s vs (799.40±241.829) mm/s,P＞0.05].Conclusion After the formation of brain herniation induced by acute intracranial hypertension,the CSF flow in the C3 level spinal canal showed a low dynamic change,and the CSF flow velocity waveform was disordered and malformed.The non-invasive measurement of CSF dynamics by PC cine MRI can provide an important basis for the change of CSF dynamics in the model of brain herniation induced by acute intracranial hypertension,and provide a theoretical basis for further research on damage control neurosurgery in the future.