Objective To study the optimal dose of esmolol for maintaining cardiovascular stability in patients with hypertension during tracheal extubation. Methods In post-anestheisa care unit, hypertensive patients after general anesthesia meeting the extubation criteria were included. Patients were divided into 2 groups according the age: group Ⅰ (>65 years old for the elderly hypertensive, 21 cases), and groupⅡ(≤65 years old for the non-elderly hypertensive, 22 cases). All the patients received esmolol bolus before sputum suction and tube extraction, and the tracheal extubation were extubated 2 minutes after esmolol bolus. The systolic blood pressure, diastolic blood pressure and heart rate were was recorded before tracheal extubation, 2 min after esmolol bolus, at the time of sputum suction extubation, 1 min after tracheal extubation, 3 min after tracheal extubation and 5 min after tracheal extubation. Esmolol dose was determined by the up and down method. Initial dose was 0.5 mg/kg, in accordance with the arithmetic dose (0.2 mg/kg) increasing or decreasing progressively. In negative results (the systolic blood pressure at extubation or 5 min after extubation ≥ 20% of the base, or the systolic blood pressure at sputum suction extubation>180 mmHg, 1 mmHg=0.133 kPa) esmolol dose increased progressively, and in positive results (the systolic blood pressure at extubation or 5 min after extubation<20%of the base) esmolol dose decreased progressively. When the crosspoint (from positive to negative result) reached 6, the study was terminated. Results The median effective doses of esmolol for maintaining cardiovascular stability in groupⅠand groupⅡwere (0.6 ± 0.1) and (0.8 ± 0.1) mg/kg. Conclusions Esmolol can maintain cardiovascular stability in patients with hypertension during tracheal extubation. Median effective dose decreases in older hypertensive patients.

Objective To investigate the value of soluble epithelial cadherin(sE-cad)in the differential diagnosis of pleural effusion. Methods Patients were divided into malignant pleural effusion group,infective pleural effusion group and transudation group.sE-cad in pleural fluids obtained during the first thoracocentesis was measured by enzyme-linked immunosorbent assay(ELISA).The concentration of sE-cad in all kinds of pleural effusions was compared.The cut-off value of sE-cad for the differential diagnosis of benign and malignant pleural effusion was determined by ROC curve.The diagnostic value of sE-cad was also compared with common tumor markers such as CEA,CA199,CA125 and NSE.Results The concentration of sE-cad was significant higher in the malignant pleural effusion than in the benign pleural effusion[(38.38?4.15)ng/mL vs(14.17?0.80)ng/mL,P

OBJECTIVEIsobaric tags for relative and absolute quantitation (iTRAQ) combined with mass spectrometry were used to screen differentially expressed plasma proteins in cold stress rats.

METHODSThirty health SPF Wistar rats were randomly divided into cold stress group A and control group B, then A and B were randomly divided into 3 groups (n = 5): A1, A2, A3 and B1, B2, B3. The temperature of room raising was (24.0 +/- 0.1) degrees C, and the cold stress temperature was (4.0 +/- 0.1) degrees C. The rats were treated with different temperatures until 12 h. The abdominal aortic blood was collected with heparin anticoagulation suction tube. Then, the plasma was separated for protein extraction, quantitative, enzymolysis, iTHAQ labeling, scx fractionation and mass spectrometry analysis.

RESULTSTotally, 1085 proteins were identified in the test, 39 differentially expressed proteins were screened, including 29 up-regulated proteins and 10 down-regulated proteins. Three important differentially expressed proteins related to cold stress were screened by bioinfonnatics analysis (Minor histocompatihility protein HA-1, Has-related protein Rap-1b, Integrin beta-1).

CONCLUSIONIn the experiment, the differentially expressed plasma proteins were successfully screened in cold stress rats. iTRAQ technology provided a good platform to screen protein diaguostic markers on cold stress rats, and laid a good foundation for further. study on animal cold stress mechanism.

Animals ; Blood Proteins ; chemistry ; Cold Temperature ; Mass Spectrometry ; Rats ; Rats, Wistar ; Stress, Physiological

OBJECTIVETo identify the expression characteristics of the 1700001022RIK (RIKEN cDNA 1700001022) gene in mice and explore its function by bioinformatic analysis.

METHODSUsing the expression profile of gene microarray, we detected the expression of a new testis-specific gene, 1700001022RIK, in mice. We analyzed its expression characteristics in the testis tissue and their changes in different developmental stages of the testis by RT-PCR, real-time RT-PCR, Western blot, and immunohistochemistry. We performed bioinformatic analysis using a bioinformatic software.

RESULTSThe 1700001022RIK gene was specifically expressed in the mouse testis in an age-dependent manner, most highly in the adult mice. The 1700001022RIK protein was mainly expressed in the spermatogonia, spermatocytes, and round spermatids of the adult mice. Bioinformatic analysis showed that the 1700001022RIK protein amino acid sequence had a high similarity in human and mice, which indicated that this gene was highly conserved in mammals.

CONCLUSION1700001022RIK is a testis-specific gene mainly expressed in the spermatogonia, spermatocytes, and round spermatids of seminiferous tubules, which might be involved in the regulation of spermatogenesis.

Age Factors ; Animals ; Blotting, Western ; Computational Biology ; DNA, Complementary ; Gene Expression ; Genomics ; Male ; Mice ; Molecular Chaperones ; genetics ; Seminiferous Tubules ; Spermatids ; Spermatocytes ; Spermatogenesis ; genetics ; Spermatogonia ; Testis

Objective To investigate the correlation between lumbar physiological curvature and Pfirrmann grading of lumbar intervertebral disc in young patients with lower lumbar pain.Methods 1 1 1 cases with lower lumbar pain were analyzed retrospectively by lumbar MRI examination.The MRI image was reviewed by two radiologists,and the degree of lumbar physiological curvature and lumbar disc degeneration were observed.Chi square test was applied to the statistical results.Results Final analysis was performed on 300 discs in 60 cases of patients with lumbar physiological curvature straightening.Among them,209 were grade Ⅰ-Ⅱ(70%),45 grade Ⅲ(15%),35 grade Ⅳ(11%)and 11 grade Ⅴ(4%)in Pfirrmann grading.In total of 255 discs of 51 cases with normal physiological curvature of the spine,there were 212 (83%)of Pfirrmann grade Ⅰ-Ⅱ,22 of grade Ⅲ(9%),19 of grade Ⅳ(7%)and 2 of grade Ⅴ(1 %).There was statistical difference between the lumbar physiological curvature straightening and the normal lumbar physiological curvature group (P< 0.05).The proportions of degeneration of Ⅰ-Ⅱ in the lumbar physiological curvature group was lower than that in normal lumbar curvature group,while the proportions of gradeⅢ,ⅣandⅤdegeneration in the lumbar physiological curvature group were higher than that in normal lumbar curvature group.Conclusion Stratification lumbar physiologic curvature is an important factor for lumbar disc degeneration and easy to cause Pfirrmann gradeⅣ-Ⅴdegeneration in young patients.

OBJECTIVETo explore the relationship between the expression of Survivin and Ki67 with prognosis of pancreatic endocrine tumors (PETs).

METHODSImmunohistochemistry for Survivin and Ki67 was performed in 25 cases of normal pancreatic tissues and 81 cases of PETs by tissue microarrays and to observe the expression and evaluate the relationship with prognosis.

RESULTS(1)The expression of Survivin and Ki67 in PETs was significantly higher than that in normal pancreatic tissues (P <0.01); (2)The expression of Survivin and Ki67 in PETs was correlated with tissue grading and the TNM-staging (P < 0.05), but not related with tumor size, location and functional status. In addition, the expression of nuclear Survivin was association with lymph node metastasis (P < 0.05). (3)The high expression of Ki67 was related with the expression of nuclear Survivin, but not related with the expression of cytoplasmic Survivin.

CONCLUSIONSurvivin and Ki67 were both expressed in PETs, which were closely related to the clinical pathological characteristics. They could be used as new indicators in the evaluation of prognosis of PETs. The expression of Survivin in nucleus had more diagnostic significance than that in cytoplasm, and that could be highly correlated with lymph node metastasis, which would be used as a new marker of poor prognosis.

Biomarkers, Tumor ; metabolism ; Cell Nucleus ; metabolism ; Cytoplasm ; metabolism ; Humans ; Immunohistochemistry ; Inhibitor of Apoptosis Proteins ; metabolism ; Ki-67 Antigen ; metabolism ; Lymphatic Metastasis ; Neoplasm Staging ; Pancreatic Neoplasms ; diagnosis ; Prognosis

OBJECTIVETo construct and characterize EGFP reporter gene labeled Sindbis virus (SINV).

METHODSThe reporter gene EGFP was inserted into the genome of infectious clone pBR-XJ160 by using multi-fusion long fragment PCR method. Then apply reverse genetic manipulation technique to rescue and obtain EGFP labeled SINV.

RESULTSWe successively obtained labeled SINV, which has good fluorescent expression characteristics and genetic stability.

CONCLUSIONThe labeled virus can be seen in living cells and living body, and this serves as a good tool for cell and tissue tropism and biological function study of viruses. This study laid a foundation for further studying the cell tropism, biological functions and infection mechanism of SINV.

Base Sequence ; Genes, Reporter ; Green Fluorescent Proteins ; genetics ; Molecular Sequence Data ; Sindbis Virus ; genetics

AIMTo observe redox modulation of ion channel in trigeminal ganglion neurons by oxidants and reducing agents.

METHODSThe effects of oxidants and reducing agents on maxi-conductance calcium-activated potassium channel in cultured rat trigeminal ganglion neurons by using whole-cell patch-clamp technique.

RESULTSMethionine-specific oxidant chloramine-T (Ch-T) 1 mmol/L slightly increased the current amplitude and this enhancement did not antagonized by DTT. In contrast, cysteine-specific reagent 5, 5'-dithio-bis(2-nitrobenzoic acid) (DTNB) 500 micromol/L significantly decreased current amplitude of BK(Ca) channels. The effect was reversed by the reducing agent 2 mmol/L 1, 4-dithio-DL-threitol (DTT).

CONCLUSIONReactive oxygen species were definitely involved in regulation of native neuronal function via redox modulation of BK(Ca) channels, which are suggested to play compensatory roles under oxidative stress-related conditions.

Animals ; Cells, Cultured ; Large-Conductance Calcium-Activated Potassium Channels ; physiology ; Male ; Neurons ; metabolism ; physiology ; Oxidation-Reduction ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Trigeminal Ganglion ; cytology ; physiology

OBJECTIVETo investigate the protective effect and mechanism of curcumin derivatives B06 on myocardium from type 2 diabetic rats.

METHODSThirty-five male SD rats were randomly divided into 5 groups, normal control group (NC group), high fat group (HF group), high fat treatment group (FT group), diabetes mellitus group (DM group) and diabetes treatment group (DT group) (n = 7). The late four groups were fed with high fat food, after four weeks of high fat feeding, the rats from DM group and DT group were injected with low dosage of streptozocin intraperitoneally to induce diabetes mellitus, FT group and DT group were gavaged with curcumin derivatives B06 at the dosage of 0.2 mg/kg x d. The blood glucose and lipid were detected biochemically, blood insulin was assayed by ELISA and the insulin resistance index was calculated, the morphology of myocardium was observed by light and transmission electron microscopy, the protein expression of AMP-activated protein kinase alpha (AMPKalpha) and phosphorylated AMP-activated protein kinase alpha (p-AMPKalpha) in myocardium were tested by Western blot.

RESULTSThe level of blood glucose, lipid, insulin and the insulin resistance index were increased in HF group and DM group, but they were decreased after the treatment with B06. The expression of AMPKalpha and p-AMPKalpha were decreased, but they became increased after the treatment of B06. There were increased collagen fibers in interstitium and expansion of mitochondria in cytoplasm of myocardium from DM group, but they were ameliorated in B06 treatment group.

CONCLUSIONIt is suggested that B06 may relieve the damage of myocardium from type 2 diabetic rats and the increased expression of AMPKalpha and p-AMPKalpha may be involved in it.

AMP-Activated Protein Kinases ; metabolism ; Animals ; Blood Glucose ; Curcumin ; pharmacology ; Diabetes Mellitus, Experimental ; physiopathology ; Heart ; drug effects ; Insulin Resistance ; Male ; Myocardium ; pathology ; Rats ; Rats, Sprague-Dawley ; Streptozocin

Objective:To explore clinical application effect of cardiac remote real -time monitoring system.Methods:Cardiac remote real -time monitoring warning instrument(iHolter)was applied in 210 patients.The iHolter gave a-lerts automatically in case of ECG abnormalities for corresponding treatment in time,and it offered corresponding reports on monitoring results.According to age,patients were divided into youth group(<45 years,n=59),mid-dle-aged group(45160 years,n=56)and aged group(≥60 years,n=95).Characteristics of arrhythmias among different age and sex were analyzed.Results:ECG abnormalities were found in 191 cases(90.95%)out of 210 pa-tients,including eight cases with malignant arrhythmias,in which five cases were treated and survived after timely intervention via alerts.Compared with youth group and middle -aged group,there were significant rise in percenta-ges of paroxysmal atrial tachycardia(16.9%,26.8% vs.54.7%)and atrial fibrillation(0%,0% vs.8.4%)in aged group,P< 0.05 or <0.01;abnormal percentages of heart rate variability of middle -aged group and aged group were significantly higher than that of youth group(25.0%,36.8% vs.5.1%,P<0.01 both).Male percent-age of paroxysmal ventricular tachycardia was significantly higher than that of female(81.3% vs.18.8%,P=0.013).Conclusion:Cardiac remote real-time monitoring system can offer timely alerts for cardiovascular events such as arrhythmia and myocardial ischemia etc.,fight for more time for rescuing patients,maximally protect cardi-ac function and improve accuracy of clinical diagnosis.