【Objective】 To explore the protective effects of exogenous hydrogen sulfide （H2S） on oxygen glucose deprivation and re-oxygenation （OGD/R）-induced SH-SY5Y cell injury. 【Methods】 OGD/R model was established in SH-SY5Y cells. Based on interferences， SH-SY5Y cells were divided into control group （no interference）， OGD/R model group， and treatment groups （OGD/R model treated with different concentrations of NaHS （H2S donor）. The cells were cultured in low glucose medium without fetal bovine serum under 37 ℃， 93% N2 and hypoxia （2% O2） for 12 h， then in complete medium under normoxia （5% O2 ） for 24 h. CCK-8 was used to detect cell viability， and flow cytometry was used for assaying the level of cellular apoptosis. Western blot was used to detect the expression levels of endoplasmic reticulum stress-related proteins including glucose regulatory protein 78 （GRP78）， CCAAT/enhancer-binding homologous protein （CHOP）， NF-κB P65 and COX-2. 【Results】 The cell viability was lower in OGD/R model group than in the control group （P<0.05）. NaHS treatment at a concentration of 0-0.5 mmol/L increased cell viability in OGD/R model group in a dose-dependent manner （P<0.05）. In contrast， NaHS （C>0.5 mmol/L） decreased cell viability of OGD/R （P<0.05）. The apoptosis level of early stage in OGD/R model group was significantly higher than that in control group （P<0.05）. NaHS treatment at concentrations of 0.2 and 0.4 mmol/L lowered the apoptosis level of early stage in OGD/R model group （P<0.05）. Western blot showed that the protein expression levels of GRP78， CHOP， NF-κB p65， and COX-2 were significantly higher in OGD/R model group than those in control group （P<0.05）. When compared with OGD/R model group， the expression levels of GRP78， CHOP， NF-κBp65 and COX-2 were decreased by NaHS at concentrations of 0.2， 0.4 and 4 mmol/L （P<0.05）， but there was no statistically significant difference among the treatment groups （P>0.05）. 【Conclusion】 NaHS can rescue cell viability of OGD/R-induced cell injury. It may be achieved by inhibiting the activation of NF-κBp65 and COX-2 proteins induced by endoplasmic reticulum stress to reduce the level of cell apoptosis.

Objective:To investigate the status of Corona Virus Disease 2019 (COVID-19) health literacy and associated factors in Inner Mongolia Autonomous Region.Methods:Based on the multi-stage stratified sampling method, the questionnaire survey of health literacy of COVID-19 were carried out in 55 599 local residents from12 prefecture-level cities of Inner Mongolia Autonomous Region between March 10 and 15, 2020. The questionnaire in details included not only knowledge, attitude and behavior, but also mental health, their scores were calculated using Decimal method. A ≥80% of the correct answer rate of the survey content was regarded as qualified for health literacy. There were 51 722 (93.0%) valid questionnaires, according to the ratio of medical staff to non-medical staff, 32 529 questionnaires were selected for analysis. The health literacy level was defined according to the proportion of qualified people.The credibility and availability of the questionnaires were evaluated by Cronbach′s α coefficient and KMO test. The associated factors were analyzed by Pearson χ 2 test and logistic regression. Results:In Inner Mongolia Autonomous Region, the whole level of health literacy of COVID-19 was 85.7%, and their scores were (26.30±2.48). Knowledge, attitude, and behavioral literacy levels were 61.6%, 95.6%, and 96.8%, respectively. Compared with the population of 15-25 years old, the health literacy level of 46-65 years old was the highest ( OR=2.00, 95% CI: 1.78-2.24). The health literacy level of medical staff group ( OR=2.54, 95% CI: 1.30-4.95) was far higher than the non-medical staff group; the population with college or above education level ( OR=10.22, 95% CI: 9.19-11.36) was significantly higher than the population with education level below college. The degree of anxiety was negatively correlated with education level. Conclusions:The health literacy level of COVID-19 in residents in Inner Mongolia Autonomous Region is relatively high, but the level of knowledge literacy needs to be improved. The main factors affecting the health literacy of COVID-19 among Inner Mongolia residents are age, occupation and education level.

Objective To investigate the relationship between fragmented QRS (fQRS) complexes and the severity of coronary artery lesions in elder patients with complex coronary artery lesions.Methods Two-hundred and one elder patients with complex coronary lesions undergone coronary angiography in Beijing Anzhen Hospital from January 2013 to July 2016 were enrolled.Based on the coronary lesions,patients were divided into the complex coronary lesions group and the simple coronary lesions group.The clinical features and coronary scores were compared between groups.Logistic regression analysis was used to evaluate the risk factors of complex coronary lesions.Results Compared with simple coronary lesions group,the complex coronary lesions group was associated with higher rate of fQRS (31.3％ vs.17.2％,x2 =9.68,P＜0.01),more number of fQRS leads [(1.0±1.5) vs.(0.5±0.8),t=-4.04,P＜0.01],longer duration of QRS [(87.2±10.7) ms vs.(84.1±8.9) ms,t=-3.09,P＜0.01].Moreover,patients with fQRS had a lower level of high density lipoprotein cholesterol (HDL-C) [M(Q25,Q75),0.9 (0.8,1.1) mmol/L vs.1.0 (0.9,1.2) mmol/L,t=-2.84,P＜0.01] and a higher Gensini score [40 (8-76) vs.22 (16-2),t=8.63,P＜0.01] compared with those without fQRS.Furthermore,Logistic regression analysis showed that HDL C (OR=0.346,95％CI:0.163 0.674,P＜0.05),fQRS (OR=2.215,95％ CI:1.381-3.725,P＜0.05) and the number of fQRS leads (OR=4.613,95％ CI:2.412-9.578,P＜0.05) were independent risk factors for patients with high Gensini score,and there was a positive correlation between fQRS and Gensini scores (=0.624,P＜0.01).Conclusions fQRS might be a noninvasive indicator of severity of coronary artery lesions for elder patients with complex coronary lesions.

Objective To discuss the significance of the application of neutrophil to lymphocyte ratio (NLR)combined with prostate specific antigen (PSA)in early diagnosis of prostate carcinoma.Methods 120 cases with surgery treatment of prostate carcinoma were selected as study group,and 120 healthy people were selected as control groups.The NLR and PSA were tested to diagnose the prostate carcinoma.The critical value of NLR in diagnosing prostate carcinoma was evaluated by ROC curves,and the advantages of combination of NLR and PSA were judged. Results By using ROC curves to evaluate the NLR in diagnosis,the critical value was 2.75.The susceptibility, specificity,Youden index,correct index were 0.79,0.85,0.65,0.72.The susceptibility,specificity,positive predictive value,negative predictive value,correct index of NLR combined with PSA in diagnosing the prostate carcinoma were 0.85,0.83,5.00,0.18,0.68.Conclusion The application of NLR has higher susceptibility and specificity to diagnose prostate carcinoma.NLR combined with PSA can improve the susceptibility and specificity of early diagnosis of prostate carcinoma.

Objective To investigate the effect of exogenous hydrogen sulfide (H 2 S) on H2 S concentration and cystathionine β-synthase (CBS) expression in hippocampus in a rat model of vascular dementia (VaD). Methods A rat model of VaD was induced by using the modified four -vessel occlusion. The rats were divided into sham operation, model, low -dose and high-dose NaHS groups using the random number table method. They were further redivided into one day, seven -day, and 30-day subgroups according to the time after modeling. After modeling respectively, NaHS 30 μmol/kg and 100 μmol/kg were injected intraperitoneally every day in the low -dose and high-dose NaHS groups. The normal saline was injected intraperitoneally every day in the sham operation group and the VaD model group. Morris water maze test was used to evaluate the learning and memory ability of the rats. The expression of CBS in hippocampus was detected by real-time fluorescent polymerase chain reaction. Western Blotting was used to detect expression of CBS protein in hippocampus. Results Morris water maze test showed that the escape latencies of the model group, low -dose and high-dose NaHS groups were prolonged significantly compared with the sham operation group (P <0.05); the times of crossing the platform were decreased significantly compared with the model group (P <0.05); and the escape latencies were shortened significantly in the low -dose and high-dose NaHS groups compared with the model group ( P <0.05). The H2 S content in hippocampus was decreased significantly in the model group, low -dose and high-dose NaHS groups compared with the sham operation group, but the low -dose and high-dose NaHS group was significantly higher than that in the model group (all P <0.05). The expression of CBS mRNA and protein in the model, low -dose and high-dose NaHS groups was significantly lower than that of the sham operation group (all P < 0.05), and there was no significant difference between the low -dose and high-dose NaHS groups and the model group. Conclusions Exogenous H2 S may improve the learning and memory ability of the VaD rats. It may be associated with the increased H2 S content in hippocampus. However, it has no effect on CBS expression.

BACKGROUNDTraumatic optic neuropathy (TON) is one of the reasons for permanent vision loss. Currently, the clinical practices may not be sufficient for direct assessments and comprehensively determining the location and extent of the patients with optic nerve injury in traumatic optic neuropathy. Magnetic resonance imaging (MRI) provides a non-invasive option. However, rare reports have found whether the differentdegree of injury of the optic nerve can be detected by manganese-enhanced MRI (MEMRI). This study aimed to explore the efficacy of MEMRI in the visual pathway for different severity of opitic nerve injury in rats.

METHODSThe different injuries of mild, moderate, and heavy damages were created by modified reverse tweezer and were evaluated by counting retinal ganglion cells (RGCs) and VEP ananlysis. Sprague-Dawley (SD) rats were intravitreally injected with 2 l of 25 mmol/L MnCl2, which has been confirmed as a safe injection concentration. The contrast-to-noise ratio (CNR) of MEMRI for optic nerve enhancement at different injury levels was measured.

RESULTSThe location of the significantly decreased signal point on optic nerve (ON) was corresponding to the location we made. However, similar findings are not obvious, or even have not been observed in 28 days in each group and also in 14 days at F100 group, indicating that MEMRI could be directly intuitive positioned in the early stage on the optic nerve injury.

CONCLUSIONSThe possibility of using MEMRI in optic nerve injury in a safe injection concentration of 25 mmol/L is confirmed. Therefore, it is possible to detect the severity of the optic nerve by MEMRI examination.

Animals ; Magnetic Resonance Imaging ; methods ; Male ; Manganese ; Optic Nerve Injuries ; diagnosis ; pathology ; Rats ; Rats, Sprague-Dawley ; Retinal Ganglion Cells ; pathology

Objective ToinvestigatetherelationshipbetweenmuscleRASoncogenehomolog (MRAS)genepolymorphismandyoungpatientswithischemicstroke.Methods Atotalof243young patients with ischemic stroke from Nanjing Stroke Registry Program from December 2009 to October 2012 were enrolled retrospectively. At the same time,512 age-and sex-matched healthy controls were selected. The polymorphisms of MRAS genes rs3755751 and rs9289559 loci were analyzed by the modified multiplex PCR-ligase detection reaction assay. The genotype of each locus and the allele frequencies were analyzed and compared. Results (1)The frequencies of AA,AG and GG genotypes for rs3755751 in the stroke group (n=243)were 7. 4%(n=18),37. 0%(n=90),and 55. 6%(n=135),respectively. There were no significant differences compared with those (6. 4%[n=18],36. 9%[n=189]and 56. 6%[n=190]) in the control group (n=512)(P>0. 05). The frequencies of AA,AG and GG genotypes for rs9289559 in stroke group were 7. 0 (n=17)%,42. 0%(n=102),and 51. 0%(n=124),respectively. There were no significant differences compared with 6. 1%,(n=31)37. 9%(n=194),and 56. 1%(n=287)in the control group (P>0. 05). (2)Further construction of an effect model (AA vs. AG+GG and GG vs. AG+AA),there was no significant difference between the stroke group and the control group (P >0. 05 ). Analyzing the effects of different genotypes on plasma lipid levels showed that the high-density lipoprotein cholesterol level of the GG genotype subgroup in the young ischemic stroke group was significantly higher than that rs3755751 of the AG +AA genotype subgroup (OR,6. 80,95%CI 2.18-21.27, P=0. 001 ). Conclusions MRAS gene polymorphism may have no significant correlation with the genetic susceptibility in young patients with ischemic stroke. Polymorphism of rs3755751 may be correlated with the level of serum high-density lipoprotein cholesterol.

Stroke is a class of complex diseases,and it is the result of the combined action of environmental and genetic factors.With the development of molecular biology techniques,a large number of candidate genes associated with stroke and susceptibility loci have been identified.This article reviews the recent progress in research on the genetics of different subtypes of ischemic stroke.

Objective To investigate the clinical applicated value of simple transumbilical single-tunnel laparoscopic renal cyst decortication.Methods 7 patients with renal cysts were treated with simple single-tunnel laparoscopic renal cyst decortication.Results The operations of 7 patients were succeed.The mean operative time was 37 (28 ～ 90) min,and the mean time of pulling the drain tube out was 2 (1 ～ 4) d,and the mean int aoperative blood loss was 30 (25 ～ 80) ml,and the mean bed stay was 1.5 (1 ～ 3) d,and the mean hospital stay was 4 (3 ～ 8) d.In 7 patients,no recurrence of the cyst occurred during a follow-up of 1 ～ 6 months by color-ultrasonography,CT after operation.Conclusion The simple transumbilical single-tunnel laparoscopic renal cyst decortication has advantages of economic,minimal trauma,hairdressing,rapid recovery and better effect,therefore it maybe an ideal treatment choice for renal cysts.

ObjectiveTo investigate the independent risk factors of 30-day mortality of nontraumatic acute chest pain in emergency department so as to get non - traumatic acute chest pain risk score,MethodsThe clinical data of 532 patients with non - traumatic acute chest pain were reviewed.The independent risk factors of 30 - day mortality were identified after analysis of medical history,symptom and sign,laboratory findings by uuivariate analysis and logistic regression.Non- traumatic acute chest pain risk score was made as per the odds ratios of these risk factors. ResultsThe average age of the patients was (55.7 + 12.7 ) years,and 45 patients ( 8.4％ ) died after 30 days.In patients with non - traumatic acute chest pain,history of hypertension (OR:4.28; 95％ CI:1.59-11.55 ),prolonged chest pain (OR:1.1; 95％ CI:1.05-1.15),dyspnea (OR:6.61; 95％CI:2.40-18.10) and tachycardia (OR:1.02; 95％CI:1.00-1.04),high leucocyte count (OR:1.18; 95％CI:1.06-1.31) and D - Dimer ( OR:1.002; 95％ CI:1.001-1.002 ) predicted 30 - day mortality independently,whereas chest pain relieved by medicine (OR:0. 15; 95％ CI:0.04-0.65),high blood oxygen saturation (SaO2) (OR:0.89; 95％CI:0.83-0.98) and normal hematocrit (OR:0.92; 95％CI:0.86-0.99) were good markers to predict optimistic prognosis.Non - traumatic acute chest pain risk score was higher in 30 - day dead group than those in survival group significantly ( P ＜ 0.01 ),and mortality was significantly different between groups with various risk stratification (P ＜ 0. 01 ).Conclusions Clinical physician can predict 30 - day mortality and evaluate prognosis in patients with acute chest pain by using non - traumatic acute chest pain risk score quickly and effectively.