Objective To explore whether augmentation index is an independent risk factor for coronary heart disease or not,and the relationship between augmentation index and coronary artery disease severity.Methods In the study,245 subjects who were hospitalized between Dec.2003 and Dec.2004,were classified into 4 groups and their clinical and biological characteristics and the summary of the scores in each of the eight segment and aortic pressure waveform in ascending aorta were recorded respectively.Results The larger the augmentation index was,the more the number of coronary stenosis vessels was.Linear regression analysis indicated that augmentation index was significantly correlated with grade of coronary stenosis.When augmentation index was more than 45%,the sensibility and specificity was 91.5%and 92.6%respectively.In the logistic regression model,augmentation index was the independent risk factor for coronary heart disease,and the odds ratio of coronary heart disease was 1.893.The 95%CI was 1.421~2.521.Conclusion Augmentation index is an independent risk factor for coronary heart disease and a predictor of angiographic coronary artery disease severity.

This guideline was published by the American Institute of Ultrasound in Medicine,which has been developed to assist physicians performing sonographic studies of the brain in neonates and infants.Neurosonography should be performed only when there is a valid medical reason,and gain the necessary diagnostic information.Although it is not possible to detect every abnormality,adherence to the following guideline will maximize the detection of most abnormalities of the brain in neonates and infants that can be imaged with ultrasound.

Mitochondria play a central role in the regulation of energy metabolism and signal transduction in eukaryotic cells. Although many fluorescent labeling strategies have been developed for mitochondrial studies, the methods that enable labeling efficiency assessment at the single-mitochondrion level are still lacking. By employing the unique advantages of high sensitivity flow cytometry ( HSFCM ) in the sensitive, rapid, and quantitative multiparameter analysis of individual mitochondria, here we examined the performance of several different mitochondrial labeling strategies from the perspectives of brightness, labeling ratio, and stability. Mitochondria isolated from HeLa cells transfected with pAcGFP1-Mito plasmid upon transient or stable transfections, and mitochondria directly labeled with MitoTracker Green or SYTO 62 were analyzed by a laboratory-built three-channel HSFCM. Upon the quantitative measurement of fluorescence brightness, it was found that the fluorescence intensity of green fluorescent protein ( GFP ) in mitochondria isolated from cells with stable transfection was about 17. 7-fold higher than the transient transfection ones, and was approximately two orders of magnitude brighter than mitochondria labeled with MitoTracker Green. On the other hand, the fluorescence signal of SYTO 62 labeling decreased upon washing, indicating its rapid dissociation rate. The strong fluorescence intensity and good labeling stability make stable transfection an efficient method to label mitochondria. The experimental results demonstrates that HSFCM provides a powerful analytical tool to assess the performance of mitochondrial fluorescence labeling via high throughput single mitochondria analysis.

The relation between left atrial (LA) size and myocardial pathological changes, and clinical implications were studied in 25 patients with- rheumatic mitral stenosis. The results showed that LA size was significantly correlated with pathological severity of myocardium (P 100 ml/m2 and accompanied by moderate or severe pathological changes easily suffered from Af (P200ml/m2 and severe pathological changes. The results suggest that occurence of Af may be predicated based on the LA volume and Af cardioversion should be selectively performed to obtain better results.

Objective:To observe the dynamic changes in specific IgG antibodies induced by recombinant hepatitis E vaccine using different immunization strategies in BALB/c mice.Methods:BALB/c, C57BL/6, NIH and KM mice were immunized intraperitoneally with serially diluted hepatitis E vaccine to select a mouse strain appropriately responding to hepatitis E vaccine. Then the selected BALB/c mice were randomly divided into three experimental groups, one-dose immunization group (0 week), two-dose immunization group (0 and 4 weeks) and three-dose immunization group (0, 4 and 12 weeks), and three adjuvant control groups with the same immunization strategy as the corresponding experimental group. Blood samples were collected from the intraocular canthus at different time points and serum antibody levels were detected quantitatively.Results:The BALB/c and NIH mice had proper responses to hepatitis E vaccine administrated at different doses than the C57BL/6 and KM mice, and the antibody positive conversion rates also showed a certain dose-effect relationship. Thus, the BALB/c mice were used as the animal model. The level of specific IgG antibodies in BALB/c mice immunized with one dose of vaccine reached a peak of 44.35 U/ml around the 10th week after the immunization, and then maintained at (5.52-13.28) U/ml after a decrease. The antibody level in the two-dose immunization group increased rapidly after the second immunization and peaked at the 8th week. From the 10th week, it gradually decreased and maintained at (16.50-32.54) U/ml. The trend of antibody changes in the three-dose immunization group was similar to that of the two-dose immunization group during the first 12 weeks, but a significant increase was induced after the third immunization and the level maintained at (62.65-72.61) U/ml for a long time, which was about nine times higher than that of the one-dose immunization group and three times of the two-dose immunization group.Conclusions:This study showed that BALB/c mice were suitable models to study the dynamic changes in specific IgG antibodies elicited by hepatitis E vaccine using different immunization strategies, which provided reference for future research on its in vivo efficacy.