BACKGROUND: Numerous studies have shown that nuclear factor-KB (NF-kB) was positively correlated with vascular endothelial growth factor (VEGF) in the cerebral hypoxia region. Thus, we assumed whether NF-kB in the pathway of hypoxia-inducible factor-1 α (HIF-1α) upregulating VEGF and plays a bridge effect.OBJECTIVE: To study the effects of NF-kB in HIF-1α pathway of increasing expression of VEGF using HIF-1α-modified neural stem cells (NSCs) as vectors.DESIGN, TIME AND SETTING: In vitro observation of cytology was conducted at the Neuroscience Institute, Jiamusi University from March to December 2008.MATERIALS: Wistar rats aged less than 24 hours of both genders were used.METHODS: NSCs were transfected after amplification of adenovirus vector HIF-1α (AdHIF-ia)-green fluorescent protein (GFP).Fluorescence detection was used to determine HIF-1α-GFP and blank vector Ad-GFP expression in NSCs. Protein was extracted from transfected NSCs, blank vector NSCs and normal NSCs, separately. Subsequently, NF-kB specific inhibitor pyrrolidine dithiocarbamate (PDTC) (50,150, 300 μmol/L) was added in HIF-1α-modified NSCs. Western blot analysis was used to determine changes in VEGF expression.MAIN OUTCOME MEASURES: The following parameters were measured: expression of HIF-1α, VEGF and NF-kB in NSCs in each group; VEGF expression in NSCs following treatment of NF-kB specific inhibitor.RESULTS: Gene expression was associated with MOI and transfected time following AdHIF-1α-GFP transfected with NSCs. After transfected AdHIF-1α-GFP in NSCs, HIF-1α, VEGF and NF-kB expression was positively correlated. Expression of VEGF was reduced in AdHIF-1α-GFP-modified NSCs following treatment of NF-kB inhibitor PDTC in a concentration-dependent fashion.There were significant differences in VEGF expression between each concentration group (P < 0.05-0.01).CONCLUSION: NF-kB in signaling pathway of HIF-1α-upregulated VEGF expression and played a bridging effect.

Objective To determine the influence of ginsenoside Rg1 on angiogenesis and the expression of vascular endothelial growth factor (VEGF) and hypoxia inducible factor-1? (HIF-1?) in rat acute myocardium ischemia (AMI) in rat. Methods A murine model of AMI was reproduced. Wistar rats (n=104) were randomly divided into shamoperation group, AMI control group, low ginsenoside Rg1 group (1mg/kg) and high ginsenoside Rg1 group (5mg/kg). Microvascular density, VEGF protein, VEGF and HIF-1? mRNA were assessed at 3, 7, 10 and 14 days after operation. Results The values of VEGF and HIF-1? mRNA were increasing with the duration of ischemia and hypoxia, and positive relationship was found between the time of AMI and the expression of HIF-1? mRNA. Ginsenoside Rg1 enhanced the formation of angiogenesis (P

0 05) The Kappa value was 0 83 and intraobserver agreement was bet ter b etween SeO 2 and SpO 2 .ConclusionThe sensor sticked to earlobe is feasible and simple to monitor puls oxygen saturation continuousl y in children

Objective To investigate the sensitivity and accuracy of monitoring oxygen saturation of arterial blood flowing through descending aorta with a probe placed in the lower segment of esophagus ( SeO2). Methods This study was approved by the ethics committee of our hospital and written consent was obtained. Forty-five ASA Ⅰ-Ⅲ patients (34 males, 11 females) aged 14-79, weighing 40-90 kg undergoing elective (36 patients) or emergency (9 patients) surgery were studied. After induction of anesthesia a probe we made (patent number ZL 200320115080.2) was placed in the lower segment of esophagus and connected to a monitor (Philips-150A) . The depth of insertion and the direction of the probe were adjusted until the same waveform as SpO2 was obtained. Once the best waveform was obtained, 10-15 min stabilization was allowed. The ventilator was then disconnected. When SeO, decreased from 100% to 90% mechanical ventilation was started again. The following parameters were recorded:(1) the onset time (the time from disconnection of ventilator to the time when SeO2 and SpO2 started to decrease), (2) the time needed for SeO2 and SpO2 to decrease from 100% to 95% (T95) and 90% (T90), and (3) the recovery time (the time needed for SeO2 and SpDO2 to return to 100% after mechanical ventilation was started again. Arterial blood samples were taken for blood gas analysis when Se02 and SpO2 were 90% , 95% and 100% . Results SeO2 , SpO, and SaO2 were 100% when the patients were being ventilated with 100% oxygen. When the ventilator was disconnected SeO, dropped much faster than SpO2. It took (286?15)s for SeO2 to drop from 100% to 95% while for SpO2 it took (398 ?28)s. The most readings of SeO2 were in the range of 2 standard deviation from SaO2. SeO2 correlated well with SaO2 and SpO2. r was 0.9754 and 0.9656 respectively(P

Child ; Child, Preschool ; Endoscopy, Digestive System ; Female ; Follow-Up Studies ; Humans ; Infant ; Male ; Peptic Ulcer

Objective To study the clinical appilication of detachable balloon embolization techenique in carotid cavernous fistula. Methods 27 cases consisted of 26 cases of typical TCCF and 1 case of CCF caused by left anterio cerebral artery(A1) aneurysm ruptured . 27 cases were treated by endovascular embolization with detachable balloon. Transcranial Doppler ultrasound(TCD) was used before and after embolization.All the patients were followed-up for more than 6 months. Results 22 cases of TCCF were cured by detachable embolization and their internal carotid artery(ICA) remained patent. The first segement of left anteriol cerebral artery was embolized by two detachable balloons in the patient with CCF caused by ruptured aneurysm. Internal carotid artery was embolized by two balloons in 4 cases. There was no severe complication in this group. Conclusions Detachable balloon embolization is a safe and effective method for internal carotid cavernous fistula.

Objective To analyze the clinical characteristics,diagnosis,differential diagnosis and treatment of gastrointestinal schwannoma.Methods Clinical data of 3 patients with gastrointestinal schwannoma were collected and retrospectively analyzed.Results Gastrointestinal bleeding or melena,anemia and epigastric pain were the most common presenting symptoms.The symptoms,physical signs and auxitiary examinations (such as X-ray,ultrasonography and gastrointestinal endoscopy) of gastrointestinal schwannoma had no value in differentiation.In all the 3 patients definite diagnosis was achieved only by postoperative pathology.Conclusion Gastrointestinal schwannoma are derived from the Schwann cells of nerves in gastrointestinal wall and are usually benign.Benign schwannomas can only be distinguished from the malignant ones on the basis of histological and immunohistochemical criteria.Surgical resection is the most effective treatment.

Objective To explore the relationship between organizational justice and turnover intention among nurses of tertiary hospitals and to provide implications for human resource management.Methods Totally 511 nurses were recruited from four tertiary hospitals of Jinan City and investigated with Organizational Justice Questionnaire and Turnover Intention Scale.Results The average scores of turnover intention and organizational justice were (2.46±0.61) and (3.55±0.62),respectively.Distributive justice and informational justice were significant predictors of turnover intention.Conclusions The turnover intention of nurses in tertiary hospitals is high.It is beneficial for mitigating nurses' tumover intention to improve their organizational justice,apply post management and performance appraisal model.

To standardize the harvest ways of Dendrobium officinale and improve the quality and yield of D. officinale, a field experiment was carried out to study the effect of two kinds of harvest ways, which were keeping some of the axial shoot and harvesting all of the shoot by the end of the year. Then, the agronomic traits and yield were measured and the contents of polysaccharides and extractum were determined. The results showed that the harvest ways significantly affected the growth of D. officinale. Keeping some of the axial shoot could significantly improved the number of sprout, stem length, internode number and the internodal length, which also triggered increase the weight of fresh stems, leaves and the total of them and dry stems in per unit area, but it could not promote the stem diameter and the polysaccharide content in stems. Keeping some of the axial shoot moderately was conducive to the improvement of the production of medicinal materials in the process of harvesting by promoting the germination and growth of new buds, and to ensure the polysaccharide content by regulating the illumination and the density of cultivation.
Agriculture ; methods ; Dendrobium ; chemistry ; growth & development ; Drugs, Chinese Herbal ; analysis ; Plant Leaves ; chemistry ; growth & development ; Plant Stems ; chemistry ; growth & development

BACKGROUND:Endogenous hydrogen sulfide can be used as a new gaseous signaling molecule, and has important signal transfer function and biological regulation effects. OBJECTIVE:To study the neuroprotective effects of hydrogen sulfide in rats with acute cauda equina syndrome. METHODS: The 72 Sprague-Dawley rats were randomly assigned to three groups. Experimental group, model group: laminectomy was performed at the lumbar 4 (L4) level of the vertebra, and a piece of silicone (10 mm long, 1 mm thick, and 1 mm wide) was placed under the laminae of the L5-6 vertebra to produce the animal model of cauda equina syndrome. Sham surgery group: a simple laminectomy was performed in L4, but silicone was not implanted. In the experimental group, 20 μmol/kg NaHS was injected intraperitonealy at 1 hour before model establishment. Model and sham surgery groups: an equal volume of saline was injected intraperitonealy. At 12, 24, 48 and 72 hours after model establishment, malonaldehyde and glutathione levels in cauda equina nerve tissue were detected. Simultaneously, hematoxylin-eosin staining and TUNEL staining were performed at 48 hours. RESULTS AND CONCLUSION:Hematoxylin-eosin staining demonstrated that cauda equina nerve tissue was dense and regular, with complete myelin sheath, no axon sweling in the sham surgery group. Cauda equina nerve tissue was sparse, with the presence of demyelination, and partial axons and myelin sheath sweling in the model group. Cauda equina nerve tissue was tight, with axonal sweling and demyelination in the experimental group. TUNEL staining demonstrated that the number of positive cels was less in the spinal cord and dorsal root ganglia in the sham surgery group. Abundant positive cels were detected in the spinal cord and dorsal root ganglia in the model group. The number of positive cels was significantly lower in the experimental group than that in the model group. Malonaldehyde levels were lower in the sham surgery and experimental groups than in the model group (P < 0.05, P < 0.01), but glutathione levels were higher than model group (P < 0.05,P < 0.01). These results indicated that hydrogen sulfide could decrease oxidative stress and protect cauda equina nerve in rats with acute cauda equina syndrome.