Objective To explore the difference of clinical features and laboratory indexs with different vasovagal responses in(head-up) tilt test(HUT) in children with vasovagal syncope(VVS).Methods Forty consecutive children diagnosed with VVS by HUT were analyzed.The vasovagal responses were divided into vasodepressor,cardioinhibitory and mixed patterns.The distribution and different clinical features and laboratory indexs of different response patterns in the VVS were studied.Results The most common vasovagal response was vasodepressor.There was no significant difference in their clinical features,including the motivation,presymptom,frequency and duration of syncope,baseline heart rate and blood pressure,and serum electrolytes among the children with different vasovagal respon-ses.Conclusion Vosodepressor response is the most common hemodynamic pattern in vasovagal syncope in children.

Objective:To study and promote the quality standard for Shuangbai Quyu powder. Methods:A microscopic identifi-cation method was performed to identify Phellodendri amurensis cortex, Rhei radix et rhizoma, Platycladi cacumen and Andrographis herba. TLC was performed to identify Phellodendri amurensis cortex, Andrographis herba and Rhei radix et rhizoma. HPLC was used to determine the content of berberine hydrochloride in Phellodendri amurensis cortex. and the lower limit was determined. Results: The microscopic identification method was simple. The spots in TLC were distinct without any interference from the negative coutrol. Ber-berine hydrochloride had a good linear range of 0. 010-0. 400 μg(r=0. 999 9). The average recovery was 99. 51%, and RSD was 0. 31% (n=6). Conclusion:The method can be used for the quality control of Shuangbai Quyu powder effectively,which is beneficial to the quality standard promotion of hospital preparations.

BACKGROUND: Previous experiments demonstrated that low-temperature isotropic pyrolytic carbon has excellent biological features. However, the research regarding low-temperature isotropic pyrolytic carbon prosthesis in hip joints, especially the biological features following hemiarthroplasty are poorly understood. OBJECTIVE: Utilizing implantation experiment, the aim of this study was to investigate the biocompatibility, as well as the interface wear properties of carbon femoral head prosthesis, coated with low-temperature isotropic pyrolytic carbon (silicon). DESIGN, TIME AND SETTING: In vivo hemiarthroplasty, randomized controlled animal experiment. The experiment was performed at the Experimental Animal Center, the Second Military Medical University of Chinese PLA, from October 2008 to April 2009. MATERIALS: Carbon femoral head prostheses.were supplied by Jilin Central Hospital. The carbon femoral head prosthesis was coated with low-temperature isotropic pyrolytic carbon. METHODS: Carbon femoral head prostheses were implanted in 16 adult New Zealand white rabbits. The rabbits were sacrificed at weeks 6 (n=4), 11 (n=6), 21 (n=6), respectively. Rabbits in the 21-week group were induced to move from 18 weeks with 2 hours per day. MAIN OUTCOME MEASURES: The biocompatibility and the interface wear phenomena of the prostheses were investigated by general observation, X-ray observation and tissue slice observation. RESULTS: The carbon femoral head prostheses implanted in animals produced non-toxic side effects, without significant inflammatory response or foreign body reaction. Furthermore, new cartilage tissue around carbon prosthesis was found, while there was no obvious wear debris after sports experiments. CONCLUSION: The film coating carbon materials have excellent biocompatibility and good wear resistance as femoral head prosthesis. Thus, it is a kind of promising biomaterials in prosthesis manufacturing.

To investigate effects of cultured astrocytes from Sprague Dawley rat cerebral cortex on the development of PC12 cellsderived from rat pheochromocytoma, PC12 cells were cocultured with astrocyte according to different astrocytes/neurons ratio(50:1～1:1) , or with serum-free conditioned medium of astrocytes(ACM). The vitality of PC12 cells was measured by sensi-tive MTT method and their morphologic features were observed by Olympus light microscope. The results showed: (1) WhenPC12 cells were cultured with ACM, compared with the control group, the vitality of PC12 cells was increased significantly (0.255+0. 012 vs 0. 510±0. 036, P<0. 001) and the morphological changes were not obvious in the experimental group. (2) WhenPC12 cells were cocultured with astrocyte in the ratio of 30: 1～1: 1, not only was the vitality of PC12 cells enhanced, but alsothe neurite-outgrowth of PC12 was observed. (3) When PC12 cells were cocuhured with astrocyte in proportion of 50: 10～40 : 1, the vitality of PC12 cells was also enhanced, but the neurite-outgrowth of PC12 was not found. This study suggested en-hancement of PC12 cell-vitality was mediated by soluble factors produced by astrocytes, while activity of the neurite-promotingwas associated with cell-cell contact and with the ratio of two cells.

Objective To explore the effect of age on neurogenesis of dentate gyrus granule cell and the impact on differentiation of newborn cells in rats.Methods SD rats were selected and divided into 5 groups according age of 7,14,28,60,180 d(n=8),and the neurogenesis of dentate gyrus granule cell in hippocampus with normal development was detected,using 5-bromo-BrdU(BrdU) labled newborn neuron and ?-tubulin protein(TuJ1) and glial fibrillary acidic protein(GFAP) labeled glial cells,and understood the newborn cells to neurons and glial cell differentiation ratio.Results Neurogenesis was found in dentate gyrus granule cell layer with hippocampus of all different age rats.Various forms of cells with a larger nucleus that were round,oval,diamond were distributed over the entire granule cell layer.BrdU-positive cells within each group were 158.07?5.37,141.28?7.27,116.93?9.24,76.56?6.88,41.42?4.45,the number of BrdU-positive cells were reduced with the growth of rats(P0.05);4%-5% newborn cells expressed GFAP.In addition,some of the BrdU-positive cells at the same time did not express TuJ1 or GFAP.Conclusions There are neurogenesis in dentate gyrus granule cell in rats of different age.The new born cells mostly differentzate into granule neuron cell.The capability of cell proliferation are decreased with the growth of age.

Objective To study the mRNA expression of myelin basic protein (MBP) and myelin oligodendregha glyeoprotein (MOG) in hippocampus of rats following global brain ischemia.Method The four- vessel occlusion animal model in the Sprague-Dawley rats was used in this study.The mRNA expression levels of MBP and MOG in the hippocampus of rats were analyzed by reverse transcription polymerase chain reaction (RT- PCR) at day 2,4,7,14 and 28 days after global brain ischemia.There were eight rats at each time-point and sham operated group.Results The mRNA expression of both MBP and MOG in hippocampus of rats decreased at 2 days after global brain ischemia.The gene expression of myelin gene decreased significantly at 7 days and it reached to the lowest level at 28 days.Compared with sham operated group,the gene expression of MBP and MOG in hippocampus of rats decreased significantly at 7,14 and 28 days after global brain ischemia (P

Objective To evaluate the respiratory mechanics and inflammatory status in elderly patients with stable chronic obstructive pulmonary diseases (COPD).Methods The arterial blood gases (ABGs),respiratory drive and its derivatives,mechanics of respiratory muscles,resistance and compliance of airway,interleukin-8 (IL-8)and interferon-?(IFN-?)were measured in 42 cases withstable COPD and 40 subjects of normal control.Results The elderly patients with stable COPD had great changes in the following parameters while compared with the control group:peak inspiratory pressure(PIMAX) [(4.48?2.11)vs(6.10?2.91)kPa],maximum expiratory pressure (PEMAX)[(6.30?3.20)vs(9.15?93.30)kPa],0.1s mouth occlusion pressure(P_(0.1)) with its correction index,airway resistance,compliance,ABGs,the levels of IL-8[(218.46?91.14) vs (161.84?14.40)ng/L]and IFN-?[(2435.82?639.92)vs(1652.40?95.08)ng/L],which might aggravate the progress of COPD consistently.Conclusions The elderly patiends with stable COPD has marked changes in respiratory drive,airway resistance,and airway compliance,respiratory mechanic and inflammatory status.The intervention should be performed in the elderly stable COPD patients.

The stromal cell-derived factor 1 (SDF-1) interacts with its receptor CXCR4 to transduction signals, playing important roles in most physiological and pathological processes. It is reported that CXCR4 is highly expressed in many kinds of hematological malignancies and closely related to the prognosis, drug resistance and relapse of diseases. The growth of tumor cells can be inhibited by the anti-SDF-1 antibody or anti- CXCR4 antibody, supporting a new way for the therapy against hematological malignancies. Their expression in relation with prognosis and drug resistance of hematological malignancies are summarized in this review.
Chemokine CXCL12 ; biosynthesis ; genetics ; Drug Resistance, Neoplasm ; genetics ; Hematologic Neoplasms ; metabolism ; pathology ; Humans ; Prognosis ; Receptors, CXCR4 ; biosynthesis ; genetics ; Signal Transduction ; Stromal Cells ; metabolism

Objective To investigate the pathogenesis of familial systemic lupus erythematosus (SLE), by analyzing the gene expression profile of peripheral blood in a family with 2 SLE patients and their first-degree relatives. Methods Total RNA was extracted from peripheral blood cells of normal subjects and SLE patients. Then, synthesis double strand cDNA template from total RNA, transcription of cRNA probe with Biotin labeling, hybridization of probe with Microarray, binding of Streptavidin to Biotin, amplification with First Antibody, further amplification with Cy3-Conjugated Second Antibody, detection of Cy3 dye with ScanArray 5000 were performed. With QuantArray microarray analysis software, the scan image information was converted into numeric data. With GeneSpring microarray analysis software, cluster analysis was done to find interested genes. Results Over 3000 target genes were analysed. Fifty-nine genes differentially expressed in familial SLE patients and controls were identified. Among them, 34 genes were up-regulated and 25 genes were down-regulated. These differentially expressed genes identified in two familial SLE patients were almost identical to those found in other sporadic SLE patients. Among 34 expression increasing genes, 22 were up-regulated in SLE sisters and unaffected sisters; among 25 expression decreased genes, 17 genes down-regulated in SLE sisters and unaffected sister. Cluster analysis showed that patients were clearly separated from controls and their unaffected sisters based on their gene expression profile. These results showed that in familial SLE, multiple genes were responsible for susceptibility to SLE, and clinically unaffected relatives shared some lupus susceptibility genes with their clinically affected relatives, in addition environmental factors were probably necessary to trigger disease. Conclusion These results indicate that high-density oligonucleotide microarray has the potential to explore the heredity in SLE families.

The influence factors for hydrogen production using photosynthetic bacteria group were studied. The effects of carbon sources, nitrogen sources, carbon concentration, nitrogen concentration, initial pH value, illumination mode and inoculation amount on hydrogen production were investigated by experiment of single factor and orthogonal experiment. The optimum process conditions were as follows: the best bacteria group was number 3, the glucose was carbon source and concentration of carbon source was 3 g/L; the urea was nitrogen source and concentration of nitrogen source was 9 g/L; the inoculation amount was 10%; initial pH value was 8.5; the illumination mode was 12 h light and 12 h dark alternation; incubation temperature was 30?C. The main factors affecting hydrogen production were strain, carbon sources, carbon source concentration and nitrogen suorces.