Aim To study the effect of bombesin on body temperature thermothreshold.Methods With IL-1?-induced febrile rats as research subject,the content of PGE2 in hypothalamus and plasma was detected with radioimmunoassay.Results(1) Induced by i.c.v.injection of IL-1?(0.1 ?g),the content of PGE2 in hypothalamus and plasma of the febrile rats significantly increased(P

Objective To investigate the effect of rocuronium 0.3 mg/kg(ED95)for anesthesia induclion on monitoring of recurrent laryngeal nerve in patients undergoing thyroid surgery.Methods Seventy-five patients,ASA Ⅰ or Ⅱ,aged 20-70 yr,weighing 50-85 kg,scheduled for thyroid surgery,were randomly divided into two groups:rocuronium group(groupⅠ,n=38)and sevoflurane group(group Ⅱ,n =37).Anesthesia was induced with midazolam 2 mg,propofol 2 mg/kg,sulfentanil 0.5 ug/kg.After loss of eyelash reflex,group Ⅰ received rocuronium 0.3 mg/kg(ED95)and was intubated with the electromyographic(EMG)endotracheal tube under glidescope al 2 min after rocuronium administration.Group Ⅱ received sevoflurane inhalation and was endotracheal intubated with EMG tube until end-tidal sevoflurane concentration achieved 4％.Anesthesia was maintained with inhalation of sevoflurane in both groups.SP,DP,and HR were monitored continuously through the surgery.Cooper's score and the success of attempt at endotracheal intubation were recorded.Recurrent laryngeal nerve evoked EMG was recorded by neuromonitoring and the amplitude of EMG responses was recorded at 5 min intervals from 30 min to 70 min of surgery duration.Results SP,DP and HR remained within normal range in both groups.The success rates of endotracheal intubation were 100％ in both groups,but the Cooper' s score of group Ⅰ was significantly higher than that of group Ⅱ(P ＜ 0.05).Compared with group Ⅱ,the amplitude of EMG respouses was significantly decreased in group Ⅰ(P ＜ 0.05).However,the EMG response in group Ⅰ was adequate for neuromonitoring of recurrent laryngeal nerve.Conclusion Rocuronium 0.3 mg/kg(ED95)for anesthesia induction can not only provide satisfied endotracheal intubation conditions,but also be adequate for monitoring of recurrent laryngeal nerve in patients undergoing thyroid surgery.

Objective To estimate the influence of 1,25(OH)2D3 on the proliferative ability of and methylation levels of genomic DNA and proliferation-associated gene promoter in human HaCaT keratinocytes.Methods Some cultured HaCaT cells were treated with 1,25 (OH)2D3 of 10-6,10-7 and 10-8 mol/L for 24 hours,then,methyl thiazolyl tetrazolium (MTT) assay was carried out to evaluate the proliferative activity of cells,and a global DNA methylation quantification kit was used to determine the global DNA methylation level.Real-time PCR was conducted to quantify the mRNA expression of DNA methyl transferases (DNMTs) and methyl-DNA binding domain (MBD) proteins,and methylation-specific PCR (MS-PCR) to evaluate the methylation status of promoter region in the programmed cell death 5 (PDCD5) and tissue inhibitor of metalloproteinase 2 (TIMP2) genes,in HaCaT cells after 24-hour treatment with 1,25 (OH)2D3 of 10-6 mol/L.The HaCaT cells receiving no treatment served as the control.Results Compared with the untreated HaCaT cells,those treated with 1,25(OH)2D3 of 10-6 mol/L showed significantly down-regulated proliferative activity (0.152 ± 0.027 vs.0.290 ± 0.017,P ＜ 0.01),global DNA methylation level (0.187 ± 0.071 vs.0.316 ± 0.049,P ＜ 0.05),DNMT3a and DNMT3b mRNA expression levels (P ＜ 0.01 or 0.05),but markedly upregulated mRNA expression levels of MECP2,MBD2,PDCD5 and TIMP2 (P ＜ 0.01 or 0.05).Moreover,the DNA methylation levels within the promoter region of PDCD5 and TIMP2 genes were significantly lower in HaCaT cells treated with 1,25 (OH)2D3 of 10-6 mol/L than in the control cells (0.38 ± 0.135 vs.0.72 ± 0.121,0.46 ± 0.172 vs.0.68 ± 0.133,both P＜ 0.05).Conclusions 1,25(OH)2D3 may down-regulate the global genomic DNA methylation level of,and modulate the expression of DNA methylationmodifying genes in,HaCaT cells.Furthermore,1,25 (OH)2D3 can decrease the promoter methylation levels but induce the overexpression of PDCD5 and TIMP2 genes,and decelerate the proliferation of HaCaT cells.

Adult ; Aged ; Dust ; analysis ; Humans ; Middle Aged ; Niacin ; therapeutic use ; Nitric Oxide ; blood ; Nitric Oxide Synthase ; blood ; Occupational Exposure ; analysis ; prevention & control ; Silicon Dioxide ; adverse effects

Objective To compare the 7th edition of International Union Against Cancer ( UICC) staging system with the Chinese 2008 staging system for nasopharyngeal carcinoma ( NPC) , and to provide evidence for further updating of the staging system. Methods A retrospective analysis was performed among 767 patients who were pathologically and newly diagnosed with non?metastatic NPC and treated with intensity?modulated radiotherapy from 2006 to 2012. Based on the main prognostic indices, overall survival ( OS) , locoregional failure?free survival( LFFS) local relapse?free survival ( LRFS) , and distant metastasis?free survival ( DMFS) rates, the value of T stage, N stage, and clinical stage in prognostic prediction was compared between the two staging systems. The Kaplan?Meier method was used for calculating survival rates. The log?rank test was used for survival difference analysis. The Cox model was used for multivariate prognostic analysis. Results In terms of T stage, the Chinese 2008 staging system was a significantly better predictor of the OS and LRFS rates than the 7th edition of UICC staging system. In terms of N stage, they were comparable in the prediction of the OS and DMFS rates. In terms of clinical stage, the 7th edition of UICC staging system was a significantly better predictor of the OS rate than the Chinese 2008 staging system. For the new staging system proposed based on the statistical results, the T, N, and clinical staging gave significantly better prognostic prediction. Conclusions The 7th edition of UICC staging system and the Chinese 2008 staging system for NPC have their own advantages in prognostic prediction. The new staging system proposed in this study could contribute to the updating of the current staging system for NPC.

Objective To evaluate the effects of N-acetycysteine on the expression of caveolin-3 (Cav-3) during myocardial ischemia-reperfusion (I/R) in diabetic rats.Methods Twenty-four pathogenfree healthy adult male Sprague-Dawley rats,weighing 230-270 g,were divided into 3 groups (n =8 each) using a random number table:myocardial I/R group (group I/R),diabetes mellitus plus myocardial I/R group (group D) and N-acetycysteine group (group NAC).Diabetes mellitus was induced by injection of streptozotocin 60 mg/kg via the tail vein and confirmed by blood glucose ≥ 16.7 mmol/L 3 days later.At 1 week after successful establishment of the model,N-acetycysteine 1.5 g · kg-1 · d-1 was injected through a gastric tube into stomach for 4 consecutive weeks in group NAC,and the equal volume of normal saline was given for 4 consecutive weeks in I/R and D groups.Myocardial I/R was then induced by 30 min ligation of the left anterior descending branch of the coronary artery followed by 2 h of reperfusion.At the end of reperfusion,the myocardial infarct size was determined by triphenyl tetrazolium chloride staining,the levels of serum creatine kinase-MB (CK-MB) and 15-F2t-Isoprostane were measured by enzyme-linked immunosorbent assay,and the expression of myocardial Cav-3,Akt,phosphor-Akt (p-Akt),endothelial nitric oxide synthase (eNOS) and phosphor-eNOS (p-eNOS) was detected by Western blot.Results Compared with group I/R,the myocardial infarct size and levels of serum CK-MB and 15-F2t-Isoprostane were significantly increased,and the myocardial Cav-3,p-Akt and p-eNOS expression and NO level were decreased in group D (P＜0.05).Compared with group D,the myocardial infarct size and levels of serum CK-MB and 15-F2t-Isoprostane were significantly decreased,and the myocardial Car-3,p-Akt and p-eNOS expression and NO level were increased in group NAC (P＜0.05).Conclusion N-acetycystein can activate Akt/eNOS/NO signaling pathway through up-regulating myocardial Cav-3 expression,thus reducing myocardial I/R injury in diabetic rats.

Aged ; Aged, 80 and over ; Anti-Bacterial Agents ; pharmacology ; Coal Mining ; Cross Infection ; complications ; microbiology ; Drug Therapy, Combination ; therapeutic use ; Humans ; Male ; Methicillin ; pharmacology ; Methicillin Resistance ; Microbial Sensitivity Tests ; Middle Aged ; Pneumonia ; drug therapy ; etiology ; Silicosis ; classification ; complications ; Staphylococcus aureus ; drug effects ; Treatment Outcome

Objective To study the levels of senlm uric acid(UA)in normal glucose(NC),impaired glucose regulation(IGR)and type 2 diabetes mellitus(T2DM),and investigate its relationship with insulin resistance and dyslipidemia.Method The levels of blood glucose,lipids,fasting insulin(HNS)and serum UA were measured in patients of 45 T2DM(T2DM group),20 IGR(IGR group)and 29 NC(NC group).Status of insulin resistance and insulin secretion function was evaluated by HOMA-IR and ISI.Results The levels of triglyceride(TG)and UA in T2DM group and IGR group were significantly higher than those in NC group[(3.34±8.77),(1.85±0.67),(1.26±0.38)mmoi/L and(316.71±96.20),(403.62±76.80),(325.45±94.43)mmol/L](P<0.01).HDL-C levels in T2DM group were significantly lower than those in IGR and NC group[(1.05±0.30),(1.07±0.21),(1.12±0.20)mmol/L](P<0.01).NO significant difference of FINS levels was found in the three groups.HOMA-IR level in T2DM and IGR group was higher than that in NC group(3.84,3.77,2.34)(P<0.01).ISI in T2DM and IGR group was lower than that in NC group(-4.52±0.79,-4.44±0.19,-4.03±0.58)(P<0.01).Correlation analysis indicated that the level of UA was positively related with BMI.TG and negatively related with HDL-C.Conclusion Increased UA in IGR indicates that hyperurieacidemia developes before DM.

Objective To investigate the effect of Amp activated protein kinase(AMPK)activity in radiosensitivity of human na-sopharyngeal carcinoma cells .Methods Human nasopharyngeal carcinoma cells ,CNE-2 ,were treated with AMPK inhibitor ,Com-pound C(CC) ,for 1 h .Then cells were explored in X-ray .The expression of total AMPK (t-AMPK) ,phosphorylation AMPK (p-AMPK) ,and MAPlLC3 were detected by Western blot .The number of autophagosomes were observed and calculated by transmis-sion electron microscope(TEM) .Cells processed with CC were explored in X-ray .MTT assay was used to detect the difference of two groups in cell proliferation .Cell apoptosis were assayed by flow cytometry .Results The expression of p-AMPK in CC group cells were significantly downregulated compared to the negative control group cells (P< 0 .01) ,while no significant change of t-AMPK expression were found(P>0 .05) .The expression of MAPlLC3 and the number of autophagosomes in CC group cells were significantly decreased compared to the control group cells (P<0 .05) .Correspondingly ,the cell proliferation rate in CC group was lower than in control group ,and the percent of apoptosis cells was higher in CC group than in control group (P<0 .05) .Conclusion Suppression of AM PK activity could inhibited autophagy induced by decreasing the degree of p-AM PK ,then enhanced the effect of proliferation inhibition and apoptosis promotion in CNE-2 cells .The AMPK inhibitor ,CC ,can serve as an effective assistant treatment of radiotherapy for nasopharyngeal carcinoma .

Objective To investigate the effect of autophagy in radiosensitivity of nasopharyngeal carcinoma CNE-2 cells.Methods The expression of ATG5 in CNE-2 cells was inhibited by lentiviral mediated RNA interference.The cells were divided into three groups:control group,NC group and ATG5 group.Cell proliferation,apoptosis and radiosensitivity were detected by CCK-8 method,flow cytometry and colony-forming assay,respectively.Results Compared with the NC group and control group,the survival of ATG5-interfected cells was reduced (F =3.755,46.086,8.609,44.160,P ＜ 0.05).After 6 Gy X-ray irradiation,the apoptosis index of the ATG5 group significantly higher than that of NC group and control group (F =394.876,P ＜ 0.05).In addition,the radiosensitivity of ATG5 group was also higher than that of control cells.Conclusions Suppression of autophagy activity enhances the radiosensitivity of human nasopharyngeal carcinoma cells.