Objective: To study 24-hour blood pressure variability (BPV) in essential hypertensives(EH) and to observe the effects of enalapril on BPV in the patients. Methods: BPV were evaluated in 132 EH patients (EH Ⅰ-Ⅱ group 90, EH Ⅲ group 42) using ambulatory blood pressure monitoring, and compared with 60 normal controls.45 EH Ⅰ-Ⅱ patients were treated with enalapril for 4 weeks by randomized single-blind study.The BPV were measured before and after treatment. Results: The SBPV and MAPV during 24-hour period, daytime or nighttime were significantly higher both EH Ⅰ-Ⅱ and EH Ⅲ than control group ( P 0.05).Conclusion:There was a significant increase in BPV(especially in SBPV) and in particular EH Ⅲ group than control group There was no effect in BPV with EH Ⅰ-Ⅱ group by enalapril treatment for 4 weeks.

BACKGROUND: Focal ischemic model made by middle cerebral artery occlusion (MCAO) is much similar to the process of onset in human cere bral infarction, whereas in the process of modeling some problems such as selection of nylon strand with improper diameter and inserted depth would result in modeling failure. OBJECTIVE: To improve MCAO model of focal cerebral infarction. DESIGN: Single-factor design, animal experiment. SETTING: Department of Pediatrics, Affiliated Maternal and Children's Hospital of Guangzhou Medical College. MATERIALS: The experiment was conducted in the Experimental Center of Guangdong Province from January. 2002 to March 2004. A total of 24 healthy Wistar rats were randomly divided into sham-operation group and model group with 10 rats in each group.METHODS: In rats of the model group, the common carotid artery (CCA) and external carotid artery (ECA) were isolated and ligated. A strand was inserted via the incision on CCA near the furcation between CCA and ECA as deep as possible with the depth of (2.0±0.2) mm. The diameter of nylon strand was 0.2 mm, the top of nylon strand was treated by melting paraffin. The interrupted time of blood circulation was 3 hours. Rats in the sham-operation group were treated by slightly drawing back the nylon strand to the CCA immediately after inserting.MAIN OUTCOME MEASURES: ①Neurobehavioral rating: It was conducted at 3 and 12 hours after ischemia with the score ranged 0-4 points.The higher the score was, the severer the neural functional deficit was, 1-3 points signified successful modeling. ②Area of cerebral infarction: Rats wereexecuted at 12 hours after ischemia. Then, brains were quickly removed and stained with tetrazolium chloride (TTC). The percentage of cerebral infarction area was calculated. ③Observation on pathological changes under light microscope.RESULTS: All of 20 rats entered the final analysis.①Eight out of 10 rats in the model group represented contra lateral tumble or draw outward circles, positive Homer's syndrome can be seen in the ligated side (3 points);One rat was disable to completely extend the claws in the contra lateral side of ligation (1 point), one rat had no neural symptoms.②Some pathological changes can be seen in the model group such as swelled cerebral tissues in the ligated side, which were bigger than the contra lateral side and were in pale; The cortex, basal ganglia and thalamus in the ligated side after TTC staining were in pale, whereas the cerebral tissues in the sham-operation group were in red with clear border.③There was no infarct in the sham-operation group, and the percentage of cerebral infarction area in the model group was (22.40±4.52)%, the infarct area of rats in groups were fundamentally same.CONCLUSION: It is necessary to adapt the strand with appropriate diameter, inserted depth and interrupting time for successful modeling.

Mouse AtlasTM cDNA Arrays were used for comparative studies of gene expression in mouse embryonic fibroblasts (MEF) before and after in vitro cultivation and 24 types of differentially expressed genes were identified. To screen and identify the differentially expressed new genes of MEF, cDNA suppression subtractive hybridization (SSH) technique was used. The cDNAs derived from cultured MEF after SSH were subcloned into pGEM T easy vectors to set up the subtractive library, transfected into E. coli strain JM109, sequenced and analyzed with bio informatics methods after PCR amplification.Altogether 42 types differentially expressed genes and 3 novel ESTs were identified and categorized from total 128 ESTs derived from cultured MEF after SSH. It is suggested that the genes expressed by MEF were the important molecular basis supporting the survival, proliferation and self renewal capacities of embryonic stem cells.

0.05). Conclusions Autop-hagy/lysosomal pathway was activated immediately after recurrent seizures as indicated by the elevated expression of Beclin1 in cerebral cortex. 3-MA was involved in the regulation of autophagy/lysosomal pathway by down-regulating the expression of Beclin1.

Objective To compare differential diagnostic value of narrow-band imaging (NBI) magnifying endoscopy and magnifying chromoendoscopy.Methods A total of 92 lesions from 75 patients were examined with conventional colonoscopy,NBI magnifying endoscopy and magnifying chromoendoscopy to evaluate pit patterns and vascular morphology patterns.Endoscopic findings were compared with the pathological results.Results The detection rate of conventional endoscopy,NBI magnifying endoscopy and magnifying chromoendoscopy were 94.6％ (87/92),97.8％ (90/92) and 100.0％ (92/92),respectively.NBI magnifying endoscopy was superior to the magnifying chromoendoscopy (P =0.000) in the the lesion contour and microvessels pattern detection,but there was no difference in the pit patterns detected with the two techniques (P =0.394).Consistency,sensitivity,and specificity of NBI magnifying endoscopy in diagnosis of colorectal neoplastic lesions were 91.3％ (84/92),83.9％ (26/31),95.1％ (58/61),respectively,while these variables of magnifying chromoendoscopy were 89.1％ (82/92),80.6％ (25/31),93.4％(57/61),which were not statistically significant (P ＞ 0.05).Conclusion Differential diagnostic value of NBI magnifying endoscopy and magnifying chromoendoscopy for colorectal neoplastic and non-neoplastic lesions was similar,but NBI magnifying endoscopy displays the lesion contours and microvessels clearlier,and is easy to manipulate.

Isoprene is an important precursor of synthetic rubber material. In our previous study, metabolic engineered Escherichia coli strain (BW-01) was constructed and used to produce isoprene. Based on the theory of protein budget, using synthetic biology strategies including the increased copy number of genes and rare codons, we regulated the expression of key enzyme to improve isoprene production in Escherichia coli strain. Under shake-flask conditions, isoprene productivity of the engineered strain (BW-07) increased by 73% compared with BW-01, reached 761.1 mg/L. It provides a reference for further studies.
Butadienes ; Escherichia coli ; genetics ; metabolism ; Gene Dosage ; Hemiterpenes ; biosynthesis ; Industrial Microbiology ; Metabolic Engineering ; Mevalonic Acid ; Pentanes ; Synthetic Biology

Objective To evaluate the effects of external substance P (SP) on scalding wound healing and neovascularization.Methods Eighty-four Wistar rats were induced into diabetic models by intraperitoneal injection of streptozotocin (STZ), and deep partial thickness scalding wound on the back with diameter of 2 cm was prepared. Rats were randomly divided into experiment group (n=42, local injection of SP) and control group (n=42, local injection of PBS). The process of wound healing was observed, and the percentages of wound closure were calculated on D0, D1, D3, D7, D10, D14, D21 post scald. The expression of CD31, surface marker of neovascular endothelial cells, was detected within the wound sites by immunohistochemical staining, and the microvessel density was calculated. Results The percentage of wound closure in experiment group was significantly higher than that in control group on D7 post scald [(42.69±3.26) % vs (30.24±1.17)%, P<0.01]. Immunohistochemical detection revealed that the expression of CD31 and the microvessel density in experiment group were significantly higher than those in control group from D7 post scald (P<0.01). ConclusionExternal SP may promote scalding wound healing in diabetic rats, the mechanism of which may be associated with upregulation of expression of CD31 and acceleration of neovascularization.

0.05)significant difference in 30 days (P0.001) between trunks groups and branches groups.Conclusion For the pationts with hypersplenism arteries were two or three branches,the PSE operation in the splenic arteriosus branches should be done,if splenic arteries were no truncus or truncus obvious crooked causing to introduce the catheter difficuty,the PSE operation in the splenic arteriosus truncus should be done.

Objective To discuss the imaging features of the localized fibrous tumor of pleura(LFTP).Methods 10 cases of LFTPproved patholgically were underwent CT scanning,while MRI scanning was performed in 3 cases.The imaging findings of LFTP wereanalysed.Results 9 cases were benign tumors and 1 case was malignant tumor.The main CT manifestations were single soft tissue massadhering to the pleural surface,clearly boundary,homogeneous or unhomogeneous density,obvious homogeneous or non-uniformityenhancement."Pleura mass hat"was characteristic appearance located the pleura mass.The mass formed acute angle or obtuse angle with the adjacent pleura,which was related to mass size and shape.MRI manifestations were hypointense or isointense on T_1WI and T_2WI,non-uniformity signal.1 case of giant LFTP showed scattered in disorder and clutter signal on T_2WI.Inside tumor peduncle of the giant LFTP was connected with the pericardium.Conclusion CT is a main imaging diagnostic technique for LFTP,while MRI is commonly superior to CT in localizing the mass and showing inner characteristics for the bigger pleural masses.The appearance of pleuraL tumor peduncle is an important sign in diagnosis of LFTP.

AIM: To study the allergic disease in recurrent tonsillitis. METHODS: Immunohistochemical technique was used to investigate interleukin-4(IL-4) production in tonsil. RESULTS:The result showed that: a higher incidence of IL-4 producing cells were found in the tonsils of all ages, and a high density of IL-4 was found in the reticular crypt epithelium and extrafollicular, but low density in germinalcenter. IL-4 has been shown play a crucial role in the pathogensis of allergic disease. CONCLUSION:Allergic disease is an important reason of recurrent tonsillitis. The conclusion will give a new way to cure recurrent tonsillitis.