Objective To investigate the effects of radiotherapy combined with resveratrol( Res)on proliferation, invasion and apoptosis of hepatoma cell line Bel-7404. Methods Bel-7404 cell line was treated with Res(25 μmol·L-1 ) combined with radiotherapy,then divided into four groups( group 1:the control;group 2:radiation at dose of 2 Gy;group 3:radiation at dose of 4 Gy;group 4:radiation at dose of 6 Gy). Cell proliferation and invasion were detected by MTT assay. Cell apoptosis were observed by fluorescence microscopy. Expressions of MMP-2 and VEGF proteins were determined by Western blotting. Results Compared with the control group,cell proliferation and invasion were significantly inhibited,while cell apoptosis was increased in all radiation groups(P〈0. 05). Conclusion The sensitivity of hepatoma Bel-7404 cells to radiation can be enhanced by resveratrol. Radiation therapy combined with resveratrol can inhibit proliferation and invasion of hepatoma cells and increase the cell apoptosis,which may be related with the down-regulation of MMP-2 and VEGF proteins.

Objective To evaluate the safety of Ad-Mathl administration to inner ear and provide the base data for vestibular dysfunction gene therapy.Methods Ten mature Wistar rats were divided into normal control group(srats) and adenovirus(E1,E3-Deleted and carried mathl and enhanced green fluorescent protein report gene,Ad-Mathl-EGFP)scala vestibuli transfer group(5 rats).Right ears of the Ad-Mathl-EGFP transfering group rats were deliveried 5ul Ad-Mathl-EGFP(physieal tite 2.1 10~(11)v.P./ml)into cochleas through the way of drilling scala vestibuli of cochlear basal turn.As a control,the normal group received nothing to inner ear.In order to estimate functional condition of vestibule and cochlea,the click-evoked potentials on the surface of the cervical dura mater(CDM-CEP),auditory brain stem response(ABR)and swimming time were recorded in all rats at 7 days after treatment,and then histologic and morphologic observation were carried out after animals were sacrificed.Results All animals' morphologic observation showed that inner ear hair cells were normal after transfer.Seven days after transfer,the swimming time was 4.0±0.71 s in normal control group and 5.0±0.71 s in scala vestibuli delivery group.The threshold of CDM-CEP and ABR were 85±3.54 dB SPL and 37±4.47 dB SPL in normal control group,and 89±6.52 dB SPL and 40±3.54 dB SPL in Ad-Mathl-EGFP scala vestibuli delivery group,respectively.There was no significant difference existed between control group and Ad-Mathl-EGFP scala vestibuli delivery group.Conclusion The Ad(E1,E3-Deleted)is safe for vestibular and cochlea hair cells and can be used as an ideal vector of gene transfer.

Objective To observe the acute toxicity of local achyranthes aspera, and its injury to major internal organs. Methods Estimated the dose before the experiment, then selected 40 mice and divided them into five groups randomly, namely 4 dose-groups and one control group. The doses used in the dose-groups were 400 g/kg, 300 g/kg, 225 g/kg and 169 g/kg respectively. Observed the symptoms and the death for successive 7 days and calculated LD (50)with statistic methods. Dissected the dead mice and observed the lesion of organs. Results The LD50 of acute toxicity test of achyranthes aspera was 309.21 g/kg, Sx=0.0359 g/kg. 95% of the limit of trust was 309.14～309.28 g/kg. According to the acute toxic standard, it belonged to non-toxicity. The specimen revealed that large dose administration caused coagulation of blood in both liver and spleen. Conclusion Local achyranthes aspera had little toxicity. Large dose administration affected heart function of mice.

Objective To explore the effect of Ginsenoside Rgl on glutathion (GSH) level and glutathion peroxidase (GPx) activity after oxygen-glucose deprivation/reperfusion in cultured hippocampal cells. Methods The model of oxygen-glucose deprivation and reperfusion were established with the hippocampal neurons of rats. They were randomly divided into control group, model group and Ginsenoside Rgl treatment groups (5 μmol/L, 20 μmol/L, 60 μmol/L). The GSH level and GPx activity were measured 6 h after reperfusion. The apoptosis and the metabolic rate of methyl thiazolyl tetrazolium (MTT) were detected 24 h after reperfusion. Results Compared with model group, the GSH level, GPx activity, and metabolic rate of MTT improved (P<0.001), and the apoptosis decreased in the Ginsenoside Rgl groups (P<0.001) except with the dosage of 5 μmol/L (P>0.05). Conclusion Ginsenoside Rgl can protect the brain from ischemia by increasing the GSH level and GPx activity.

Objective To summarize the efficacy of extracorporeal membrane oxygenation (ECMO)utilization in Emergency Department (ED),as well as the establishment of emergency ECMO team.Methods A retrospective analysis was carried out in 16 patients treated with ECMO between April 2015 to December 2016 in ED.The clinical data including demographics,diagnosis,initiating ECMO timing,place of ECMO establishment,intubation approaches,duration of ECMO,complications and outcomes were collected and analyzed.Results Eight patients were successfully weaned from ECMO,and 7 of them survived to discharge from hospital.The duration of ECMO support was 4 to 384 hours.The emergency ECMO team was set up.Conclusions Emergency medical team can successfully operate the ECMO process.The emergency medical team-initiated ECMO can provide effectively adjuvant measures to support patients with respiratory failure,circulatory failure and cardiac arrest.

Objective:To analyze the effectiveness and annual cost-effectiveness of extracorporeal cardiopulmonary resuscitation, ECPR) in adults.Methods:Totally 60 patients received ECPR from April 2015 to March 2020 in Emergency Medicine Department of the First Affiliated Hospital of Nanjing Medical University were retrospectively analyzed. The patients were grouped by discharge survival/hospital death and shockable/unshockable initial rhythm. Age, gender, initial rhythm, survival rate, ECMO treatment time, time-to-death, length of stay and hospitalization costs were analyzed. All discharged survivors were followed up for 1 year, then cost-effectiveness analysis was performed using total cost of ECPR as the cost and 1-year survival rate as the effect.Results:Fifty-four adult patients with ECPR were enrolled, and 17 (31.5%) patients survived and discharged, of whom 15 (88.2%) patients had good neurological outcomes and survived at 1-year follow-up. The median ECMO time was 5 ( IQR 1-8) d, time-to-death was 4 ( IQR 1-9) d, length of stay was 10 ( IQR 3-18) d, total hospitalization cost was 209 122 ( IQR 121 431-303 822) RMB, and the daily cost was 23 587 ( IQR 13 439-38 217) RMB. The rate of shockable initial rhythm was significantly higher in the discharge survival group than the hospital death group. The survival rate of ECPR patients with shockable initial rhythm was significantly higher than that of patients with unshockable initial rhythm, and there was no difference in cost. Conclusions:ECPR is a resource-intensive treatment with a total cost of about 200 000 RMB. Moreover, the effectiveness and annual cost-effectiveness are superior for patients with shockable initial rhythm.

Objective:To investigate the prognostic value of early lactate in patients with extracorporeal cardiopulmonary resuscitation (ECPR).Methods:A retrospective analysis was performed on the clinical data of patients with ECPR in the Emergency Medicine Department of The First Affiliated Hospital of Nanjing Medical University from March 2015 to August 2021. The age, sex, etiology, initial rhythm, prognosis, blood lactate and pH of patients with ECPR were collected, and their difference between the deceased and survived patients was compared.Results:Totally 95 patients were enrolled, with an average age of 47 years; male accounted for 69.5%, and the survival rate was 29.5%. There was no significant difference in age and sex ratio between the deceased and survived patients. However, the deceased patients had a significant lower rate of shockable rhythms (31.3% vs. 60.8%), a higher level of lactate [16.4 (11.2, 19.1) vs. 9.2 (3.2, 15.0), mmol/L], and a lower pH [7.01 (6.88, 7.23) vs. 7.37 (7.10, 7.43)] than the survived patients. Multivariate binary logistic regression analysis showed that shockable rhythm [odds ratio ( OR) = 0.295, 95% confidence interval ( CI): 0.118-0.739), lactate ( OR=1.159, 95% CI: 1.068-1.258) and pH ( OR= 0.017, 95% CI: 0.002-0.157) were independent risk factors for poor prognosis. Furthermore, a lactate level >24 mmol/L was the best threshold to predict mortality with a specificity of 100%. Combined application, the cutoff point was lactate level>16 mmol/L and pH <6.828. Conclusions:Shockable rhythm, higher early lactate and lower pH value are independent risk factors for prognosis in patients with ECPR. Early lactate > 24 mmol/L or lactate > 16 mmol/L companied with pH < 6.828 are novel indicators of the termination of ECPR.

Objective:To investigate the predictive value of platelet dynamics on the prognosis of 28-day in patients with extracorporeal membrane oxygenation (ECMO).Methods:From January 2017 to December 2020, 60 patients from the Emergency Medicine Center of the First Affiliated Hospital of Nanjing Medical University received ECMO for life support. The baseline data of the patients were collected, the minimum value of platelets on day 1-7 of the machine was calculated, and the platelet change value and change rate were calculated. The patients were divided into the survival group and death group according to the 28-day survival status after ECMO was installed, and the receiver operating curve (ROC) was drawn based on the platelet change value and change rate to evaluate its predictive value for prognosis.Results:Among patients receiving VV-ECMO, the platelet change value and change rate on day 7 had the best prediction effect on the patient's 28-day outcome ( AUCΔPLT7=0.772, P=0.016; AUCΔPLT7%=0.764, P=0.020), when the platelet change value was 4×10 9/L as the critical value, the sensitivity was 0.857, the specificity was 0.615, and when the platelet change rate was -28.99% as the critical value, the sensitivity was 0.857, the specificity was 0.615, and when the platelet change rate was -28.99%. The sensitivity was 0.643 with a specificity of 0.846. In patients receiving VA-ECMO, the platelet change rate on day 6 predicted the best effect on the patient's 28-day outcome ( AUCΔPLT6%= 0.707, P = 0.045). When the platelet change rate was -26.19% as the critical value, the sensitivity was 0.842 and the specificity was 0.643. Conclusions:Platelet dynamic changes of platelets are correlated with the 28-day prognosis of patients receiving ECMO, and the combination of platelet change value and the critical value of change rate can better predict the poor prognosis of patients in both ECMO modes.

Objective:To summarize the experience and effect of extracorporeal cardiopulmonary resuscitation (ECPR) in the treatment of out-of-hospital cardiac arrest (OHCA) in adults.Methods:The data of 40 adults with OHCA-ECPR in Emergency Department of the First Affiliated Hospital of Nanjing Medical University from April 2015 to April 2022 were retrospectively analyzed. The patients were grouped by discharge survival/in-hospital death, with/without bystander resuscitation, and with/without interhospital transport. Age, sex, Charlson comorbidity index, initial rhythm, no-flow time, time from cardiac arrest to extracorporeal membrane oxygenation (ECMO) initiation (CA-Pump On time), ECMO evacuation success rate, survival rate, ECMO treatment time, time-to-death, and length of hospital stay were analyzed.Results:①Among the 40 patients with OHCA-ECPR, 9 patients (22.5%) survived upon discharge, 7 (77.8%) of whom had good neurological outcomes.②The no-flow time in the survival group was significantly shorter than that in the death group, and the proportion of shockable initial rhythm was higher.③Bystander resuscitation greatly shortened the no-flow time.④The regional OHCA-ECPR interhospital transport extended the CA-Pump On time, without affecting patients’ prognosis.Conclusions:ECPR improves the prognosis of patients with OHCA. Bystander resuscitation greatly shortens the no-flow time. ECPR is significantly effective in patients with short no-flow time and shockable initial rhythm. Regional interhospital transport ECPR is recommended to benefit more patients with OHCA.

Objective:Early identification of ischemic stroke patients with large vessel occlusion can improve referral efficiency and shorten reperfusion time. The purpose of this study was to analyze the characteristics of patients with large vessel occlusion and identify factors that could predict large vessel occlusion.Methods:The clinical data of 432 patients with ischemic stroke treated through emergency green channel were retrospectively analyzed, and the differences between the large vessel occlusion group (LVO group) and the non-large vessel occlusion group (non-LVO group) were compared, and two independent risk factors of the LVO group were screened out by logistics regression analysis: baseline NIHSS score and D-dimer value. The predicted cutoff values of NIHSS score and D-dimer were further determined by the receiver operating characteristic (ROC) curve.Results:A total of 432 patients with ischemic stroke had complete imaging data, with a mean age of 68.5±12.4 years, including 275 (63.7%) males, and 245 (56.7%) in the LVO group and 187 (43.3%) in the non-LVO group. Age, hemorrhagic transformation, thrombolytic therapy, endovascular treatment, atrial fibrillation, baseline NIHSS score [14.0 (6.0-20.0) vs. 3.0 (1.0-6.0), P<0.05], and D-dimer value at admission [0.9(0.4-2.3) mg/L vs. 0.3 (0.2-0.5)mg/L, P<0.05] were statistically significant different between the two groups. Multivariate Logistic regression analysis showed that higher baseline NIHSS score( OR=1.22,95% CI: 1.17-1.27)and higher D-dimer value( OR=3.10,95% CI: 2.14-4.47)were independent risk factors for large vessel occlusion. Baseline NIHSS score combined with D-dimer value was a good predictor of large vessel occlusion(AUC 0.85 [0.81-0.89]). ROC curve suggested that NIHSS score >6.5 and D-dimer >0.57 mg/L were the cutoff values for predicting large vessel occlusion. Conclusions:Higher baseline NIHSS score and D-dimer value are valuable for early prediction of large vessel occlusion, patients with NIHSS score >6.5 points and D-dimer >0.57 mg/L should be promptly transported to an advanced stroke center for treatment.