Animals ; Antitussive Agents ; pharmacology ; Drug Evaluation, Preclinical ; methods ; Mice

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.

Animals ; Embryo Culture Techniques ; Embryo, Mammalian ; Female ; Ganglia, Spinal ; cytology ; drug effects ; Glial Cell Line-Derived Neurotrophic Factor ; pharmacology ; Male ; Motor Neurons ; drug effects ; Neurons, Afferent ; drug effects ; Rats ; Rats, Sprague-Dawley

The recombination clones contained CFP, LTB-ST foreign gene were screening by PCR using individual bacterial colonies as template, the aimed band was amplified from positive clones, the result was as well as plasmid PCR. The selecting of agrobacterium transformed with recombination plasmid could also use this method of PCR screening of individual bacterial colonies. The result of individual bacterial colonies PCR was as well as that of PCR using bacterial solution as template. It showed that the method individual bacterial colonies PCR was an efficient, easy one that characterized recombination clones.

Objective To evaluate the clinical efficacy of lamivudine in preventing liver injury induced by anti-tuberculosis drugs in hepatitis B virus(HBV)carriers.Methods One hundred and ten HBV carriers treated with anti-tuberculosis drugs were randomly divided into lamivudine group and control group.Patients in both groups were treated with conventional anti-tuberculosis drugs (isoniazid,rifampicin,pyrazinamide,streptomycin or ethambutol)for 6-8 months.However, patients in lamivudine group were treated with lamivudine 100 mg orally dairy concomitantly.Before and after treatment,the clinical manifestation,liver function and serum HBV DNA level of patients were evaluated.Statistical analysis was performed using t test and x~2 test.Results During 6-8 months of treatment,the incidence rate of liver injury was 9.1% in lamivudine group,while it was 38.2% in control group(P0.05).Conclusion Lamivudine is effective and safe in reducing liver injury induced by anti-tuberculosis drugs in HBV carriers.

The evaluation of quality of life after stroke primarily includes body,psychology, society,and the ability of activities of daily living,and they can be mainly obtained from self rating quality of life by the patients,The commonly used evaluation methods include six generic measurement scales and four updated Stroke Specific Quality of Life Scales.The latter includes the Stroke Adapted Sickness Impact Profile,the Stroke Impact Scale,Stroke Specific Quality of Life Scales,and Stroke and Aphasia Quality of Life Scale.This article reviews the generic meas- urement scales,Stroke Specific Quality of Life Scales and the various factors that influencing quality of life after stroke.

Objective:To investigate the expression of MMP-1 and MMP-8 in periodontal tissues in rats with periodontitis at different stages of inflammation with varied severity. Methods:Periodontitis was induced by silk ligature. P.gingivalis(Pg) or Pg with F.nu were used to induce the varied severity of periodontitis in 40 rats. 14 and 28 days after periodontitis induction the animals were sacrificed, periodontal tissues were immunohistochemically stained by antibody of MMP-1 and MMP-8 respectively. Results:MMP-1 and MMP-8 were both strongly positive in gingival epithelia cells and fibroblasts in periodontal ligament in rats with periodontitis.Higher expression of MMP-1 and MMP-8 was observed at 14 d than at 28 d(P0.05). Conclusion:The expression of MMP-1 and MMP-8 varies in different stage of periodontitis. MMP-1 and MMP-8 may play an important role in development of periodontitis.

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 analyze CT manifestations of inguinal canal lipomas (ICLS).Methods CT datas of 104 pa tients with ICLS was retrospectively analyzed.And the imaging features were observed by MPR.Results The main CT manifestations of the ICLS were fat density in the inguinal canal and were unconnected with the abdominal fat.Among the 104 ICLSpatients,male (90/104,86.54％) was more than famale(14/104,13.46％;x2=55.538,P＜0.001).Thele sions were located at bilateral sides in 8 cases,left side in 66 cases and right side in 30 cases.The lesions in left side were more than those in right side (x2 13.500,P＜0.001).The mean maximum cross-sectional area of ICLS was (3.89 ± 2.12)cm2.There was no statistically significant difference between male and famale in maximum cross-sectional area (t=1.038,P=0.302).Conclusion In ICLS patients,male is more than famale.And more lesions are located at the left side.The CT manifestations of ICLS have certain characteristics,and MPR images are helpful in diagnosing ICLS.

Adenocarcinoma ; metabolism ; pathology ; surgery ; Aged ; Female ; Gastrectomy ; methods ; Gastrointestinal Stromal Tumors ; metabolism ; pathology ; surgery ; Humans ; Keratins ; metabolism ; Neoplasms, Multiple Primary ; metabolism ; pathology ; surgery ; Proto-Oncogene Proteins c-kit ; metabolism ; Stomach Neoplasms ; metabolism ; pathology ; surgery