European Society of Hypertension/European Society of Cardiology jointly published new guidelines on diagnosis and treatment of hypertension in 2007.It reflected the the latest developments on comprehensive assessment,treatment modalities and strategies,as well as therapeutic approach for special populations.In addition,the new guidelines updated evaluation.It also stressed the importance of an early,faster and more stringent treatment and aggressive combination therapy.More impartantly,it requested prevention and treatment earlier.It is of great importance for the guidelines to guide the current diagnosis and treatment of hypertension.

OBJECTIVE:To inverstigate the inhibitory effects of 14 kinds of traditional Chinese medicines on tyrosinase activity METHODS:The effective components of traditional Chinese medicines were extracted by 50% ethanol The speed of enzymic catalysis of tyrosinase was determined by ultraviolet spectrophotometry to evaluate the inhibitory effects of extracts of traditional Chinese medicines RESULTS:14 reactive time curves of enzymic catalysis of tyrosinase were obtained CONCLUS_ION:13 kinds of traditional Chinese medicines in vitro showed a better inhibitive effect on tyrosinase activity(P

BACKGROUND: Stem cells are relatively primitive cells possessing the capabilities of self-renewal, high proliferation and multi-potential differentiation in vivo under certain conditions. Pancreatic stem cells and umbilical cord blood mesenchymal stem cells (MSCs) may serve therapeutic purpose clinically, but they are still difficult to culture in vitro at present.OBJECTIVE: To explore the method for isolation, purification and culture of pancreatic stem cells and umbilical cord blood MSCs in vitro and observe their morphological changes during culture in vitro.DESIGN: Completely randomized experiment with repeated measurement.SETTING: Stem Cell Research Center, Teaching and Research Division of Physiology, Medical School of Zhengzhou University.MATERIALS: This experiment was conducted in the Stem Cell Research Center, Teaching and Research Division of Physiology, Medical College of Zhengzhou University, between April 2004 and January 2005. Ten to fifteen newborn SD rats (1-3 days) were selected for culture in vitro of pancreatic stem cells, and fresh umbilical cord blood was collected from healthy woman (24-35 years old, with informed consent) at full-term delivery for culture in vitro of umbilical blood SMCs.METHODS: The abdomen of the newborn SD rat was opened under aseptic condition to obtain the pancreas, which was cut into small tissue blocks and digested with type-V collagenase for islet isolation. The isolated islets were purified in continuous roller-bottle culture. Umbilical cord blood was freshly collected for isolating the monocytes by means of density gradient centrifugation in lymphocyte separation medium (with density of 1.077 g/cm3). The islet cells and umbilical cord blood monocytes were cultured in the incubator at 37 ℃ with 5% CO2. The morphological changes of the cells were observed at designed time points and flow cytometry was used to determine the expression of cell surface molecules.MAIN OUTCOME MEASURES: The isolation and culture of pancreatic stem cells and umbilical cord blood MSCs, and their morphological changes during culture in vitro.RESULTS: During culture in vitro, the fusiform islet progenitor cells showed adherent polar growth and continuous proliferation, which covered the whole bottom of the flask after 12-14 days and could be subcultured for passages. However round cells appeared after removal of the growth factor and serum in the culture medium. The monocytes isolated from the umbilical cord blood grew initially into numerous hematopoietic cell clones, most of which proved to be granulocyte clones by Switzerland staining. Seven days later, flat flask wall-adhering epithelial cells and long fusiform fibroblasts were observed mixed with a number of osteoclasts. As the cell culture was prolonged, the cell number increased steadily.CONCLUSION: Pancreatic stem cells and umbilical cord blood SMCs can be cultured in vitro for further experiments.

Objective To study the pathogenesis of upper gastrointestinal rehaemorrhagia after the transjugular intrahepatic portasystemic shunt (TIPS) and its influencing factor.Methods Fifty postoperative patients with TIPS were selected.The patients were followed-up,and the effect of the various factors in the role of upper gastrointestinal rehaemorrhagia after TIPS was analyzed.Results The portal vein pressure of 50 patients with TIPS decreased from preoperative (39.8 ±9.2) cmH2O (1 cmH2O =0.098 kPa) to postoperative (25.2 ± 5.8) cmH2O,and there was statistical difference (P ＜ 0.05).Fourteen patients appeared upper gastrointestinal rehaemorrhagia after TIPS,which accounted for total of 28％ (14/50) and included 3 cases of postoperative vomiting blood within 3 days.Acute stomach mucosa lesions bleeding was considered,and bleeding was controlled within a short-term medical treatment (1 patient after more than a year in recurrent upper gastrointestinal rehaemorrhagia).Twelve cases of patients appeared upper gastrointestinal rehaemorrhagia within 2 years after TIPS,and the causes of rehaemorrhagia in 6 cases were esophageal variceal rehaemorrhagia,gastric and duodenal ulcer in 3 cases,erosive gastritis in 2 cases,coagulation abnormalities in 1 case.Esophageal variceal rehaemorrhagia rate was 12％ (6/50).Conclusions The main reasons of upper gastrointestinal rehaemorrhagia after TIPS are variceal rehaemorrhagia and non variceal rehaemorrhagia,both of which are important causes of rehaemorrhagia after TIPS.Variceal rehaemorrhagia after TIPS occurs more than 3 months,and non variceal rehaemorrhagia occurs within 3months,so it is very important to protect gastric mucosa with proton pump inhibitor in postoperative patients.

Granulocyte colony-stimulating factor (G-CSF) has been demonstrated to have neuroprotective effects in rat model with focal cerebral ischemia through anti-apoptotic pathways and by promoting proliferation of neural stem cells. In the present study, we examined the neuroprotective effect of G-CSF in an acute focal cerebral ischemia rat model with lipid metabolism disorder. Eighty male SD rats were randomly divided into normal diet control group (NC group) and high-fat diet group (HFD group) (n = 40 in each). In HFD group, rats were fed on high fat diet to induce atherosclerosis. After 29 days, 4 rats from each group were sacrificed to evaluate the effects of different diets, and the middle cerebral artery occlusion (MCAO) was performed in the rest of the rats. MCAO rats received either G-CSF (50 μg·kg(-1)·mL(-1)) or phosphate buffered saline (PBS) injection through the external jugular vein for 5 days, which was followed by 5-bromo-deoxy uridine (BrdU, i.p., 50 mg/kg) injection for another 7 days. To evaluate the effects of G-CSF treatment on neurological function, the modified neurological severity score (mNSS) was calculated. The vascular distribution, ischemic cells proliferation, cell apoptosis and the expression of vascular endothelial growth factor (VEGF) were measured to determine the effects of G-CSF treatment. Our results showed that G-CSF-treated rats had a lower mNSS than PBS-treated rats in both NC group and HFD group. G-CSF injection promoted endothelial cell proliferation and vascular regeneration, and inhibited cell apoptosis. The serum and tissue levels of VEGF were significantly increased after G-CSF treatment. It is concluded that G-CSF exerts its neuroprotective effect in focal cerebral ischemia rats with hyperlipidemia by enhancing angiogenesis, promoting cells proliferation, decreasing cell apoptosis, and increasing local VEGF expression.

Objective Conducting phacoemulsification combined with trabeculectomy through double incision to treat glaucoma and cat-aract,and observing the visual acuity,intraocular pressure before and after the operation and complications of this therapy. Methods Totally 60 patients (78 eyes) with glaucoma and cataract from January 2010 to December 2013 in our hospital were observed. 32 patients (40 eyes) who were given phacoemulsification combined with trabeculectomy through double incision were regarded as the observation group,and the other 28 patients (38 eyes) who were merely given phacoemulsification were regarded as the control group. The visual acuity,intraocular pres-sure and anterior chamber of the two groups were observed and recorded,and they were followed up for 36 months. Results Visual acuity and intraocular pressure of the two groups were improved after operation,but the observation group achieved a better result which showed a significant difference (P< 0. 05). Anterior chamber inflammation occurred in patients of the observation group,and 2 cases were of anterior chamber exudation. The control group,by contrast,has less anterior chamber inflammation. There was no hyphema,shallow anterior chamber, choroidal detachment occurred in both of the two groups. Conclusion Using phacoemulsification combined with trabeculectomy through double incision to treat glaucoma and cataract could receive a good recovery of visual acuity and intraocular pressure. Although,more severe anterior chamber inflammation occurred after operation compared with the control group,it can be alleviated soon after medication. This meth-od is a good therapy which can reduce pain and economic burden of patients from multiple operations. But it requires a strict selection of ap-propriate case.

Objective To investigate the relationship between isolated nocturnal hypertension and left ventricular hypertrophy. Methods In the inhabitants of 14 villages in Jingning County, Zhejiang Province, we performed 24-hour ambulatory blood pressure monitoring with SpaceLab monitors and measured 12-lead resting electrocardiogram using an electronic recording system of GE company, Left ventrieular hypertrophy was diagnosed with the criteria of Sokolow-Lyon voltage amplitude and Cornell product. Isolated nocturnal hypertension was defined as a nighttime ( from 22:00 to 4:00) blood pressure of ≥ 120/70 mm Hg( 1 mm Hg = 0. 133 kPa). Isolated daytime ( from 8:00 to 18:00) hypertension was a diurnal blood pressure of ≥ 135/85 nun Hg. When both conditions were present or absent, subjects were classified either as having combined day-night hypertension or as normotensive on ambulatory measurement. Analysis of variance and multiple regressions were used for statistical analysis. Results 647 participants (53.9% being female,average age 47. 8 years) included 72 patients with isolated nocturnal hypertension, 33 with isolated daytime hypertension and 248 with day-night sustained hypertension. Compared with normotensive subjects, patients with isolated nocturnal hypertension and day-night sustained hypertension had a higher Sokoiow-Lyon voltage amplitude and Comell product. However, after adjustment for sex, age, body mass index, drinking and smoking habits, serum total cholesterol, fasting blood glucose and the use of antihypertensive drugs, only day-night hypertensive patients had a significantly higher Sokolow-Lyon voltage (32. 8 mV, P =0. 0003 ) and Cornell product (1371 mV×ms, P =0.0004) than normotensive subjects (29.0 mV, 1114 mV×ms).Regardless of whether Sokolow-Lyon or Cornell criteria were used, both nighttime and daytime systolic and diastolic blood pressure were independent risk factors of left ventricular hypertrophy (P < 0. 01 ). However,the prevalence of left ventricular hypertrophy in patients with isolated nocturnal hypertension ( 23.6% ) study was not statistically different from that in normotensives ( 17.4%, P = 0. 24). Conclusion In our current cross-sectional study, isolated nocturnal hypertension was not independently related to left ventricular hypertrophy diagnosed with ECG criteria.

ObjectiveTo evaluate the effectiveness and safety of high frequency electronic associating stents insertion and subsequent radiotherapy guided by fiberoptic bronchoscope in treating tracheobronchial stenosis caused by lung and esophagus carcinoma.MethodsFifty-two patients which were ascertained with serious stenosis in trachea or bronchi by fiberoptic bronchoscope were subjected to the study.Fiberoptic bronchoscope was used to investigate the location,extent,blood supply and the degree of tracheobronchial stenosis before the study.After the focus in the airways was cleared up with high frequency electronic,electrocoagulation and snare under the guide of the euthyphoria of fiberoptic bronchoscope,Ni-Ti memory alloy stents were placed into the stenosis airways.The 52 patients were divided into two groups with 26 cases each:the stent group and the stent associating radiotherapy group(radiotherapy group).The later group accepted subsequent radiotherapy after the therapy.The following indexes of the two groups were investigated:short-time clinical effect,dyspnea index class,rate and average time of airway restenosis,life span and survival rate.ResultsAfter therapy,the 52 patients had obvious improvements in dyspnea and the diameter of the stenosis airways.The short-time total effective rate was 100.0％ (52/52),but there was not significant difference between the two groups(P＞ 0.05 ).After therapy,there was significant difference in two groups in dyspnea index class(P ＜ 0.01 ).Although there was not significant difference in the rate of airway restenosis between the two groups(P＞0.05),the average time of airway restenosis in the radiotherapy group was obviously longer than that in the stent group(P＜ 0.01 ).The survival rate of the radiotherapy group in the 6th and 9th month after therapy was higher than that in the stent group (P ＜ 0.05),but there was no significantdifferenee in the 3rd and 12th month (P ＞0.05).ConclusionHigh frequency electronic associating stents insertion and subsequent radiotherapy guided by fiberoptic bronchoscope is an effective and safe treatment for the patients suffering tracheobronchial stenosis caused by lung and esophagus carcinoma.

Objective To investigate the effect of inversion time (TI) on flow-sensitive alternating inversion recovery (FAIR) perfusion imaging of spinal bone marrow (SBM),and evaluate the reproducibility of blood flow (BF) measurements using this technique.Methods Twenty four healthy volunteers without lumbar and other disease with clinical and MR studies were prospectively included.The first 14 healthy volunteers were included to study the effect of TI on ASL perfusion imaging of SBM to get the optimized TI,the remaining 10 volunteers were included to investigate the reproducibility of the SBM arterial spin labeling (ASL) scan protocol.The optimized TI of FAIR spinal bone marrow perfusion experiment was carried out on 14 healthy volunteers on 3.0 T magnet,two adjacent vertebral bodies were orderly selected from each volunteer to measure the △M and the SNR of FAIR perfusion MRI with 5 different TIs (800,1 000,1 200,1 400,1 600 ms),and the vertebral bodies selected order were determined by the order of the subjects enrolled.In addition,FAIR perfusion spinal vertebral BF measurements were repeated in last l0 healthy subjects on L4 or L5 by reposition immediately,paired t test and reproducibility statistics (included within-patient standard deviation (wSD) and within-patient coefficient of variation (WCV)) were used to analyze the test-retest experiment reproducibility.Result TI optimization experiments total included 28 vertebral bodies,when TI (ms) was chose as 800,1 000,1 200,1 400,1 600,ms respectively,the mean △M of spinal bone marrow were 20.8±9.0,29.0± 10.9,36.4± 12.5,26.2± 10.2 and 23.8± 11.5,and the mean SNR were 2.0± 1.0,2.3±0.8,2.4± 1.0,2.3±0.8 and 2.0±0.7.With TI increasing,AM and SNR increased first and then decrcascd,the maximum values of both were achieved when the TI near 1 200 ms.Test-retestexperimcnt were carried on 10 vertebral bodies eventually,and two measurements of spinal vertebral BF perfusion before and after were (108.9±4.6)and (109.2 ±4.6)ml · 100g-1· min 1,respectively,and no significant difference was found (t=-0.157,P=0.879),wCV of the measurements was 3.28％ (3.57/109.06).Conclusion The optimal TI was 1 200 ms for spinal bone marrow ASL perfusion image,at which the maximum AM,higher SNR,and good reproducibility for the FAIR spinal bone marrow perfusion imaging can be achieved.

Objective:To screen the differentially expressed miRNAs in umbilical cord tissue of children with nonsyndromic cleft lip and/or cleft palate( NSCL/P) using miRNA microarray and comprehensive bioinformatics analysis for the prediction of related the bio-logical process and signaling pathways. Methods:Umbilical cord tissues of 4 cases of healthy newborns' and 4 lip or palate tissues of 4 cases with NSCL/P without other disease aged younger than 2 years were collected. The differentially expressed miRNAs were screened by miRNA microarray. Targets of dysrugulated miRNAs were predicted by TARGETSCAN-VERT, MIRDB and RNA22-HSA. All the gene sets were analyzed by gene ontology and pathway enrichment. Results: MiRNA microarray demonstrated that 254 miRNAs were dysregulated(181 miRNAs were up-regulated and 73 downregulated,P <0. 05). The dysregulated miRNAs targets contained 5029 genes. The dysregulated miRNAs targets were enriched in anatomical structure development,cell adhesion,cell proliferation,cell motili-ty and other biological processes. The dysregulated miRNAs targets were enriched in Wnt, mTOR, cGMP-PKG, TGFβ, PI3K-Akt and other signaling pathways. Conclusion:The target genes set of miRNAs are enriched in multiple biological processes and signaling path-ways related to NSCL/P, which indicate that genetic and environmental factors may influence the development process of NSCL/P.