Objective To determine the occurrence and baseline predictive factors of early neurological deterioration ( END) among mild ischemic stroke patients.Methods Mild ischemic stroke patients admitted in the hospital were prospectively enrolled.Univariate and multivariate Logistic recession analyses were used to analyze the demographic data, risk factors of ischemic stroke, clinical, brain imaging and laboratory data.Risk factors of END were identified.Results From June 2012 to August 2013, a total of 319 patients with mild ischemic stroke were enrolled, 45 patients (14.1%) of them experienced END.Univariate analysis showed that baseline NIHSS ( U=3522.000,P=0.000), baseline systolic blood pressure (t=2.871,P=0.004), proportion of symptomatic large artery severe stenosis or occlusion (χ2 =52.564,P=0.000) and proportion of large artery atherosclerosis among TOAST subtypes (χ2 =47.287,P=0.000) in END group were significantly higher than those in non-END group. Multivariate logistic regression analysis showed that baseline systolic blood pressure>142 mmHg (1 mmHg=0.133 kPa) (OR=3.954, 95%CI:1.693-9.236, P=0.001), symptomatic large artery severe stenosis or occlusion (OR=3.170, 95%CI:1.170-8.583, P=0.023) and baseline NIHSS (OR=2.038, 95%CI:1.359-3.057, P=0.001) were associated with END.Conclusions About 14.1% of the mild ischemic stroke patients can occur END.Baseline systolic blood pressure>142 mmHg, symptomatic large artery severe stenosis or occlusion and higher baseline NIHSS were the independent risk factors of END.

Objective:To investigate the neutralization of lecithin and polysorbate-80 in antibacterial activity of oral solid tradition-al Chinese medicine preparations without Chinese medicinal herb powder. Methods:According to the requirements in Chinese Pharma-copeia (2015 edition), the applicability of microbial counting method was tested in the diluent containing lecithin and polysorbate-80 and the conventional diluent, respectively, and the results were compared. Results: The recovery results of applicability of microbial counting method using neutralizers (lecithin and polysorbate-80) conformed to the standard of Chinese pharmacopoeia (2015 edition). Conclusion:The combination of lecithin and polysorbate-80 has notable neutralization in antibacterial activity of oral solid traditional Chinese medicine preparations without Chinese medicinal herb powder.

Objective To investigate the functional outcome in patients with mild ischemic stroke and to identify its risk factors for poor outcome.Methods The patients with mild ischemic stroke treated within 72 hours after onset were enrolled prospectively.According to modified Rankin Scale (mRS) scores at day 90 after onset,the patients were randomly divided into either a poor outcome group (mRS score ＞2) or a good outcome group (mRS scores 0-2).Univariate analysis and multivariate logistic regression analysis were used to compare and analyze the demographic data,vascular risk factors,clinical data,laboratory data,imaging data,and follow-up data.The risk factors for poor outcome in patients with mild ischemic stroke were identified.Results A total of 253 patients with mild ischemic stroke were enrolled,and 71 of them (28.1％) had poor outcome.Univariate regression analysis showed that the patients' proportions of age (t =2.037,P =0.043),baseline National Institutes of Health Stroke Scale (NIHSS) score (U =4 610.000,P =0.000),baseline mRS score (U =5 723.000,P =0.000),as well as previous history of ischemic stroke (x2 =4.950,P =0.026),severe symptomatic artery stenosis or occlusion (x2 =49.037,P =0.000),large artery atherosclerotic stroke (x2 =34.359,P =0.000),early neurologic deterioration (x2 =45.804,P =0.000),complicated by pneumonia (x2 =12.121,P =0.000) and recurrent ischemic stroke (x2 =14.305,P =0.000) of the poor outcome group were significantly higher than those of the good outcome group.Multivariate logistic regression analysis showed that advanced age (odds ratio [OR] 1.049,95％ confidence interval [CI] 1.012-1.086; P =0.008),higher baseline mRS score (OR,2.130,95％ CI 1.212-3.743;P=0.009),higher baseline NIHSS score (OR 1.532,95％ CI 1.064-2.206; P=0.022),severe symptomatic large artery stenosis or occlusion (OR 7.569,95％ CI 3.497-16.380; P=0.000),early neurological deterioration (OR 7.369,95％ CI 2.648-20.510; P =0.000) and recurrent ischemic stroke (OR 10.450,95％ CI 3.071-35.564; P =0.000) were the independent risk factors for poor outcome.Conclusions More than one fourth of the patients with mild ischemic stroke had poor outcome.Advanced age,higher baseline mRS score,higher baseline NIHSS score,severe symptomatic large artery stenosis or occlusion,early neurological deterioration,and recurrent ischemic stroke were the independent risk factors for poor outcome.

Objective T o explore the com position characteristic of event related potential (E R P ) in dif-ferent visual acuity levels, and to provide theoretical basis for the objective assessm ent of visual acuity. Methods M onocular stim ulus w as perform ed on 16 selected subjects. T he subjects w ere required to look straight at the screen ahead and count the am ount of stim uli from different directions. T he pictures of optotype stim ulus w hich corresponding to three different visual acuity levels w ere show ed in the center of the screen. The ERP results w ere recorded separately. Results (1) The P1 am plitudes of m atch stim uli recorded under the supra-threshold visual acuity level w ere higher than that of m atch stim uli recorded under the threshold and sub-threshold visual acuity levels. T here w as no significant difference betw een the P 1 am plitudes of m atch stim uli recorded under the threshold and sub-threshold visual acuity levels. T he tendency of conflict stim uli w as sim ilar to that of m atch stim uli under three visual acuity levels. (2) In the 340-500 m s post-stim ulus range, P 300 com ponent w as found under supra-threshold and threshold visual acuity levels; no P 300 com ponent w as found in corresponding tim e w indow under sub-threshold visual acuity. T he differences of P 300 am plitudes am ong three visual acuity levels w ere statistically significant. T he am plitudes from high to low w ere the supra-threshold, threshold and sub-threshold visual acuity levels. Conclusion E R P can be a potential new m ethod for the objective assessm ent of visual acuity in forensic m edicine.

Mild cognitive im pairm ent caused by craniocerebral traum a is the key points and difficulties in judicial authentication. This article has com parative analysis of eachmode of event-related potential (classical O ddball, E riksen flanker task and so on), which can provide a more objective m ethod for such craniocerebral traum a cases in clinical forensic judicial authentication.

Background and purpose:Δ133p53 can promote tumor cell growth, but the exact mechanism is not clear. This study was aimed to observe the expression and signiifcant of the p53 isoformsΔ133p53 and p53 gene downstream molecules MDM2 and cyclin G1 genes by 5-FU-MKN45 gastric cancer cell line model. Methods:Af-ter using different concentrations of 5-FU (50μg/mL, 100μg/mL) to human gastric cancer cell line MKN45, inhibition rate should be detected by MTT assay, the changes ofΔ133p53 mRNA, MDM2 mRNA and cyclin G1 mRNA express-ing were detected by reverse transcription-polymerase chain reaction (RT-PCR). Differences between these groups were analyzed by ANOVA, comparisons within groups were analyzed by t-test, bivariate correlation was analyzed by Pearson linear correlation. Results:MTT results showed that with the increased concentration of 5-FU and the extension of time, the cell inhibition rates increased gradually. The inhibition rates of 50μg/mL 5-FU were 41.10%, 54.79%and 68.48%, for culturing 24, 48 and 72 hours. There were statistically signiifcant differences between the groups(F=45.52, P=0.00). The inhibition rates of 100μg/mL 5-FU were 69.53%, 78.21%and 86.92%, for culturing 24, 48 and 72 hours. There were statistically signiifcant differences between the groups(F=85.58,P=0.00). The inhibition rates of 50 and 100μg/mL were 41.10%and 69.53%, for culturing 24 hours. There were statistically signiifcant differences between the groups(F=51.29, P=0.00). The inhibition rates of 50 and 100μg/mL were 54.79%and 78.21%, for culturing 48 hours. There were statistically signiifcant differences between the groups(F=51.29, P=0.00). The inhibition rates of 50 and 100μg/mL were 68.48%and 86.82%, for culturing 72 hours. There were statistically signiifcant differences between the groups(104.91, P=0.00). RT-PCR results showed that with the increase of the concentration of 5-FU, theΔ133p53 mRNA, MDM2 mRNA and cyclin G1 mRNA expression gradually declined in gastric cancer cell line MKN45 cells, and there were statistically signiifcant differences between the groups(F=738.532, 1 396.607, 2 785.56,P=0.00). Cor-relation analysis showed that the expressions ofΔ133p53 mRNA and MDM2 mRNA in gastric cancer were positively correlated (r=0.871, P=0.01), while the expression of cyclin G1 mRNA and p53 mRNA had no obvious relevance (P=0.13). Conclusion:In the 5-FU-MKN45 gastric cancer cell line model, anti-tumor pathway ofΔ133p53 isomers is related with MDM2 but was not related with cyclin G1.

OBJECTIVE:To optimize the formulation of Methotrexate thermosensitive hydrogels,and to study the in vitro re-lease property of it. METHODS:Taking PLGA-PEG-PLGA as matrix and mannitol as viscosity modifiers,Methotrexate thermosen-sitive hydrogels were prepared. Using the absolute value of the deviation of gelation temperature between 35 ℃,its formulation was optimized by orthogonal test using the concentrations of PLGA-PEG-PLGA,methotrexate and mannitol as factors. The dialysis bag method was used to investigate accumulative release rate of Methotrexate thermosensitive hydrogels and methotrexate solution within 336 h in vitro. RESULTS:The optimal formulation was as PLGA-PEG-PLGA of 20%,methotrexate of 0.10% and mannitol of 0.10%;gelation temperature were 35.1,35.0,35.0℃. The average drug-loading rate was more than 90%. 12 d accumulative re-lease rate was more than 90%(r=3). Methotrexate solution has been substantially completely relased within 240 h. CONCLU-SIONS:Methotrexate thermosensitive hydrogels with sustained-release are prepared successfully,and the preparation technology is simple and practical.

PurposeTo measure the areas and diameter lines of bronchi at acute exacerbation and at remission period in patients with chronic obstructive pulmonary disease (COPD) using CT, and to explore the correlation between the two periods and evaluate the comprehensive assessment in diagnosing COPD exacerbation.Materials and Methods Fifty-two COPD patients were scanned with 64-row spiral CT on chest and PFT at acute exacerbation and at remission period. The areas and diameter lines of apical segmental and the sub-segmental bronchi of the right upper lobe in the patients were measured at the two periods, including indicators such as wall thickness (WT), thickness-diameter ratio (TDR), wall area (WA), percentage of wall area (WA%). The differences of those indicators at the two periods were compared with such factors of COPD comprehensive assessment as forced expiratory volume at the first second% (FEV1%), percentage of forced expiratory volume in first second to forced vital capacity (FEV1/FVC), COPD assessment test (CAT), modified medical research council questionnaire (mMRC) for assessing the severity of breathlessness, 6-minute walking distance (6MWD). Results The patients had significant differences between acute exacerbation period and remission period in the indicators of COPD comprehensive assessment like FEV1%, FEV1/FVC, CAT, mMRC and 6MWD (t=-4.119,-2.583, 4.012, 3.321 and-3.892,P<0.05). Compared with those at remission period, the WT, TDR, WA and WA% of sub-segmental bronchi were all higher at acute exacerbation period (t=3.025, 2.341, 2.204 and 2.124, P<0.05); only TDR of segmental bronchi showed significant difference between the two periods (t=2.990,P<0.05). The correlation of sub-segmental bronchi with FEV1%, FEV1/FVC, CAT, mMRC and 6MWD was more significant than that of segmental bronchi with those indicators at the two periods.Conclusion The COPD comprehensive assessment can help diagnose COPD at acute exacerbation period; MSCT shows the remodeling of segmental and sub-segmental bronchi and the changes on the airway wall, and the quantitative measurement of sub-segmental bronchi has correlation with the differences of indicators in the comprehensive assessment; COPD comprehensive assessment seems to be more valuable than PFT in the estimation of COPD at acute exacerbation.

Objective To investigate the changes in the expression of GABAAα1, receptors in medial prefrontal cortex (mPFC) in a rat model of neuropathic pain. Methods Nine male Wistar rats weighing 200-210 g were randomly divided into 3 groups ( n = 3 each): control group (group C) , sham operation group (group S) and neuropathic pain group (group P). Neuropathic pain was induced by chronic constrictive injury. The right sciatic nerve was exposed and 4 loose ligatures were placed on the sciatic nerve at 1 mm intervals with 3-0 chromic catgut. In group S, the right sciatic nerve was exposed but not ligated. The thermal and mechanical pain threshold was measured at 1 d before and 1,4,7, 10 and 14 d after operation. The animals were then sacrificed and the mPFC was removed. The expression of GABAAα1, receptors in mPFC was determined by Western blot. Results Compared with C and S groups, thermal and mechanical pain threshold were significantly decreased and the expression of GABAAα1, receptors was up-regulated in group P ( P ＜ 0.01) . There was no significant difference was in the thermal and mechanical pain threshold and expression of GABAAα1 receptors between C and S groups (P ＞ 0.05). Conclusion Up-regulation of GABAAα1 receptor expression in mPFC may be involved in the development and maintenance of neuropathic pain in rats.

Objective T o study the effect of different attentional conditions on the event-related potential (E R P ) com ponents generated by the visual inform ation stim uli related to visual acuity, and provide a theoretical reference for clinical forensic visual objective evaluation. Methods W ith visual acuity opto-types as norm al form of visual inform ation stim uli, 15 volunteers as study subjects w ere supposed to ac-count the visual acuity optotypes under the attentional condition of visual stim uli. Furtherm ore, the sub-jects w ere required to listen to the storytelling carefully under the non-attentional condition of visual stim uli, and after the exam ination, they needed to answ er the story-related questions. A ll the E E G re-sults of tw o different attentional conditions from the subjects w ere recorded by 32 channel E R P system . Results U nder tw o attentional conditions, P 1 and P 300 com ponents w ere evoked by the visual acuity opto-types on supra-threshold and threshold visual acuity levels, w hile only P 1 com ponent w ere evoked by the visual acuity optotypes on sub-threshold levels. In the E R P w aveform s evoked by the visual acuity optotypes on supra-threshold, P 1 and P 300 am plitudes under attentional condition w ere larger than that un-der non-attentional condition. Conclusion A ttentional conditions can influence the detection of visual acuity. P 300 com ponent can be used to distinguish the visual acuity levels w ith supra-threshold and sub-threshold under non-attentional condition.