Objective:To study the effects of supranutrional levels of yeast-selenium on antioxida-tion status and immune function in mice with tumour.Method:Sixty KM mice were divided into three groups: control group,yeast-selenium Ⅰ group and Ⅱgroup.The mice were supplemented with 0.5ml normal saline,3.2 ?g and 6.4 ?g yeast-selenium respectively by gavage on time a day based on the low selenium diet.The mice were inoculated with Ehrich ascites carcinoma(EAC) after 13 d.The tumour weight and immune function and antioxidative indices in blood were measured after 23 d.Results: The two yeast-selenium levels increased the activities of GSHPx(P

Objective To evaluate the value and limitation of primary MSCT examination for rib fractures in a short interval. Methods Seventy-two cases with rib fractures were analyzed retrospectively.All of them underwent primary MSCT examination within the three days after trauma,and MSCT examination of chest,epigastria,rib or X-ray examination of rib for 1-6 times in the following 8 weeks.41 cases underwent X-ray examination firstly before MSCT examination.The total number of rib fractures was determined according to the compositive results of every examination.Diagnosis rate of the primary MSCT and X-ray examination were compared with each other.Results Among 72 cases,404 fractures in 325 ribs were diagnosed.Primary MSCT diagnosed 305 confirmed fractures and 28 doubtful fractures,and 84 fractures were not detected with diagnosis rate of 75.5%.13 of 28 suspected fractures were ruled out by the following re-examinations.The MSCT and X-ray diagnostic rates were 72.1%、50.3%,respectively for 41 cases who underwent X-ray examination firstly.Four fractures showed by X-ray plain film were not shown by primary MSCT.Conclusion There is a certain proportion of cases diagnosed as obscure or doubtful rib fracture by the primary MSCT. Therefore,diagnosis should be closely combined with the re-examination results of MSCT and X-ray plain film,especially MSCT ex-amination between the fourth and eighth weeks after trauma.

Objective To evaluate the safety and efficacy of bivalirudin in patients with acute myocardial infarction ( AMI) and diabetes undergoing primary percutaneous coronary intervention ( PCI) . Methods BRIGHT was a multicenter , randomized , controlled study which enrolled AMI patients underwent primary PCI in 83 Chinese centers between August 2012 and June 2013.All patients were randomly assigned to receive bivalirudin , heparin or heparin plus tirofiban. This study was a prespecified subgroup analysis of the BRIGHT study.A total of 465 diabetics in the BRIGHT study were included , consisted of 168 in the bivalirudin group , 137 in the heparin group and 160 in the heparin plus tirofiban group .Primary endpoint was net adverse clinical event ( NACE) at 30 days, which was defined as a composite of major adverse cardiac and cerebral events ( MACCE ) and any bleedings .Results The incidences of NACE at 30 days were significantly different among three arms ( Bivalirudin:10.1% vs.heparin:16.1% vs.Heparin plus tirofiban 20.6%, P=0.031 ) .Compared with heparin plus tirofiban , bivalirudin was associated with a significantly lower NACE rate (P<0.01).Bivalirudin treatment significantly reduced bleeding events at 30 days compared with heparin and heparin plus tirofiban ( 3.0% vs.7.3% vs.12.5%, P <0.01 ) .The 30-day incidences of MACCE and stent thrombosis were similar among the three groups ( P>0.05 ) . Conclusions The use of bivalirudin has dramatically reduced the rate of bleeding and did not increase the incidence of ischemic events compared with heparin and heparin plus tirofiban , indicating a better safety and efficacy profile of bivalirudin during primary PCI in patients with AMI and diabetes .

Objective To investigate a method for the purification of the N?terminal peptide fragment(NT)of the myocardial calcium channel Cav1.2,and characterize its interaction with calmodulin(CaM). Methods EscherichiacoliBL?21 cells were transformed with plasmid pGEX?6p?3/NT harboring the NT?GST fusion gene. The cells harboring pGEX?6p?3/NT were cultured and protein expression was induced with isopropyl?β?D?thiogalactoside(IPTG). Then,the GST?NT fusion protein was purified by using glutathione Sepharose 4B(GS?4B)beads. GST was cleaved off with the PreScission protease,and SDS?PAGE was performed to detect the purity and relative molecular weight of the purified peptide. Further, GST pull?down assay was performed to characterize the interaction of the NT peptide with CaM. Results SDS?PAGE analysis showed that the NT peptide was successfully purified,with high purity. Results of the GST pull?down assay showed that the NT peptide could interact with CaM. Conclusion This study establishes a method for the purification of the NT peptide and lays the foundation for further research on the interaction partners and biological functions of NT.

Objective To investigate the effect of enriched environment (EE) on behavior and expression of mitogenactivated protein kinase phosphatase-1 (MKP-1) in hippocampus of depression rats induced by chronic unpredicted mild stress (CUS) and to provide clues for the molecular mechanism of treating depression.Methods Forty Sprague-Dawley rats were randomly divided into control group,CUS group,fluoxetine group and EE group,with 10 rats in each group.The rats in CUS group,fluoxetine group and EE group were given 8 weeks of CUS,and from the fifth week,the rats in EE group and fluoxetine group were given EE and fluoxetine for 4 weeks,respectively.The changes of behavioristic of the rats in the four groups were evaluated by body mass gain,open field test,and sucrose preference.The expression of MKP-1 in hippocampus was detected by Western blot.Results There was no significant difference in body mass,distance of horizontal movement,the number of upright,the times of passing through the grid and sucrose preference index among the four groups(P ＞ 0.05).After modeling,compared with the control group,the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index in the CUS group,fluoxetine group and EE group were decreased significantly(P ＜ 0.05);there was no significant difference in the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index among the CUS group,fluoxetine group and EE group(P ＞ 0.05).After intervening by fluoxetine and EE,the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index in the CUS group were lower than those in the control group(P ＜0.05);but there was no significant difference in the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index between the control group and the fluoxetine group and EE group(P ＞ 0.05).Compared with the CUS group,the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index in the fluoxetine group and EE group were higher(P ＜ 0.05);there was no significant difference in the body mass gain,distance of horizontal movement,the number of up-right,the times of passing through the grid and sucrose preference index between the fluoxetine group and EE group (P ＞ 0.05).The expression of MKP-1 in hippocampus of CUS group and EE group was higher than that in the control group (P ＜0.05).There was no significant difference in the expression of MKP-1 in hippocampus between the fluoxetine group and control group(P ＞ 0.05).Compared with the CUS group,the expression of MKP-1 in hippocampus in the fluoxetine group decreased (P ＜ 0.05).There was no significant difference in the expression of MKP-1 in hippocampus between the EE group and CUS group(P ＞0.05).Compared with the fluoxetine group,the expression of MKP-1 in hippocampus in the EE group was higher(P ＜ 0.05).Conclusion EE can significantly improve depressive symptoms in rats,but it has no significant effect on MKP-1 protein expression in hippocampus,and EE may not act on depression by affecting MKP-1.

ObjectiveTo investigate the effect of intensive insulin therapy in critically ill elderly patients.MethodsElderly patients ( ≥ 65 years) admitted to the ICU of Beijing Tongren Hospital from June 2005 to December 2007 were divided into Group A ( glucose control target was 4.4-6.1mmol/L) and Group B ( glucose control target was 7.3-8.3mmol/L).Blood glucose level was controlled with a computer-assisted glucose control protocoL ResultsA total of 639 patients were enrolled,of which 280 were in Group A and 359 in Group B.The mean blood glucose level of the 2 groups was (6.07 ± 0.56) mmol/L and (7.52 ± 0.87 ) mmol/L respectively,both within the target ranges.The hyperglycemic index was (0.69±0.44) mmol/L in Group A and ( 1.60 ±0.73) mmol/L in Group B (P =0.000).No hypoglycemia adverse events occurred in either group.No significant differences were observed in the length of stay in ICU,duration of mechanical ventilation,hospitalization expenses,ICU mortality,and hospital mortality of the 2 groups.ConclusionMaintaining the blood glucose level of critically ill elderly patients at ≤8.3 mmol/L is safe and practical.

OBJECTIVE: To study the biological exposure limit of 1,3-butadiene occupational exposure. METHODS: A total of 139 workers who exposed to 1,3-butadiene in a rubber plant was chosen as exposure group,and 45 workers without 1,3-butadiene exposure were chosen as control group by judgment sampling method. Gas chromatography-flame ionization detection method was used to detect the level of 1,3-butadiene in workplace air,and ultra-high performance liquid chromatography-tandem mass spectrometric was used to determine the level of urinary dihydroxybutyl mercapturic acid( DHBMA) in end-of-shift workers. The correlation between 1,3-butadiene level and urinary DHBMA level was analyzed.The biological limit of 1,3-butadiene occupational exposure was assessed. RESULTS: The range of concentration-time weighted average( C_(TWA)) of 1,3-butadiene was from 0. 004 to 7. 609 mg/m~3,the medium was 0. 253 mg/m~3 in the exposure group,while the level of urinary DHBMA was from 0. 171 to 4. 235 mg/g Cr,and the medium was 1. 220 mg/g Cr. The range of C_(TWA)of 1,3-butadiene was below detection limit in the control group. The level of urinary DHBMA was from 0. 157 to 1. 808 mg/g Cr,and the medium was 0. 627 mg/g Cr in the control group. The level of urinary DHBMA in the exposure group was higher than that of the control group( P < 0. 01). The level of urinary DHBMA( y) of workers was related to the level of 1,3-butadiene( x) of the workplace air in the exposure group( y = 0. 349 x + 1. 082,P < 0. 01).CONCLUSION: DHBMA in urine could be used as a biomarker for 1,3-butadiene exposure in workers. The recommended biological exposure limit of DHBMA is 2. 900 mg/g Cr.

Objective:To study the patterns of tocilizumab (TCZ) use, its efficacy and safety in patients with rheumatoid arthritis (RA) in routine clinical practice.Methods:A total of 407 patients with RA were enrolled from 23 centers and treated with TCZ within 8 weeks prior to the enrollment visit, and were followed for 6-month. The patterns of TCZ treatment at 6 months, the effectiveness and safety outcomes were recorded. Statistical analysis was performed using SAS version 9.4.Results:A total of 396 patients were included for analysis, in which 330 (83.3%) patients received TCZ combined with conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), and 16.7%(66/396) received TCZ monotherapy. At baseline, TCZ was initiated in 56.6%(224/396) and 9.6%(38/396) of patients after failure of DMARDs and other biological agents (bDMARDs) respectively. During the 6-month follow-up period, the mean frequency of TCZ administration was (3.7±1.6), the mean TCZ dosage was (7.4±1.2) mg/kg, and the mean interval between doses was (40±13) days. 120(25.8%) patients were on TCZ treatment at the end of the study. Improvements in disease activity, systemic symptoms and patient report outcomes were observed at the end of the study. 22.7%(90/396) patients experienced at least one treatment related adverse event, and 8 patients experienced at least one serious adverse event.Conclusion:This study demonstrates that TCZ treatment is effective in patients with RA when being treated for 6 months with an acceptable safety profile. The duration of TCZ treatment needs to be extended.

The genus Rosa (Rosaceae family) includes about 200 species spread in the world, and this genus shows unique advantages in medicine and food. To date, several scholars concentrated on compounds belonging to flavonoids, triterpenes, tannins, polysaccharide, phenolic acids, fatty acids, organic acids, carotenoids, and vitamins. Pharmacological effects such as antineoplastic and anti-cancer properties, anti-inflammatory, antioxidant, liver protection, regulate blood sugar, antimicrobial activity, antiviral activity, as well as nervous system protection and cardiovascular protection were wildly reported. This article reviews the chemical constituents, pharmacological effects, applications and safety evaluations of Rosa plants, which provides a reference for the comprehensive utilization of medicine and food resources and gives a scientific basis for the development of medicinal plants of the genus Rosa.

Objective:To evaluate the influence of an additional roll test on the repositioning procedure by SRM-vertigo diagnosis system for horizontal canal benign paroxysmal positional vertigo（HC-BPPV）. Methods:A total of 713 patients diagnosed with HC-BPPV in Department of Otolaryngology Head and Neck Surgery，the First Affiliated Hospital of Xi'an Jiaotong University from Jan 2020 to Feb 2022 were enrolled. The patients were divided into two groups by hospital card numbers, in which the number is odd were considered as group A, and the number is even were considered as group B. The group A underwent two circles of Barbecue repositioning procedure by SRM-vertigo diagnosis system, while the group B first performed an additional roll test and then underwent two circles of Barbecue repositioning procedure by SRM-vertigo diagnosis system, to observe the cure rate and compare influence of HC-BPPV by an additional roll test. The quality of life and sleep of patients before and one-month after the treatment were assessed by the dizziness handicap inventory（DHI） and the pittsburgh sleep quality（PSQI）. Results:The cure rate of group A was 63.21%, and the cure rate of group B was 87.68%，the difference between the two groups was statistically significant（P<0.05）; The DHI score of patients after the repositioning was significantly lower than that before the repositioning（P<0.05）. The PSQI score after the repositioning was significantly lower than that before the repositioning（P<0.05）. The DHI and the PSQI scores after the repositioning were significantly lower than that before the repositioning, with a statistically significant difference （P< 0.05）. The total score of DHI in group B after treatment was lower than that in group A, with a statistically significant difference（P<0.05）. The total score of PSQI in group B after treatment was lower than that in group A, with non-statistically significant difference （P< 0.05）. Conclusion:An additional roll test before the repositioning procedure by SRM-vertigo diagnosis system can significantly improve the cure rate of HC-BPPV, relieve anxiety, and improve the quality of life.
Humans ; Benign Paroxysmal Positional Vertigo/diagnosis* ; Quality of Life ; Patient Positioning/methods* ; Dizziness ; Semicircular Canals