Tumor cells obtain energy mainly by glycolysis to maintain growth and proliferation. It is related to the DNA mutations of mitochondria and anti-oncogene mutations. Inhibition of glycolysis can inhibit proliferation and kill tumor cells. The rate-limiting enzyme of glycolysis and hypoxia inducible factor may be the new targets for cancer therapy.

Background Research determined that hypoxia inducible factor-1(HIF-1)is associated with the hypoxia response in normal organ,and it plays an important role during the embryon development.It is also proved that the expression of vascular endothelial growth factor(VEGF)is upregulated in embryon retina.But,whether the action of HIF-1 and VEGF is correlated is unclear. Objective The aim of this study was to investigate the dynamic change of expression of HIF-1α and VEGF in retina during embryonic development and explore the role of HIF-1α and VEGF along with retinal evolvement.Methods The different embryon ages of SD rats were obtained from 30 clean pregnant SD rats by cesarean surgery.The retinas were isolated from embryon 10一day,12一day,14-day,16-day and 20-day rats respectively.The expressions of HIF-1 α and VEGF protein in retina were semi-quantitatively and qualitatively determined by immunochemistry,and the expressions of HIF-l α and VEGF mRNA in retina with different-embryon-phase and adult rats were detected by RT-PCR. Results The hishly level of expression of HIF-1 α and VEGF protein were found in the cellular nuclei and cytoplasm of retina in embryon 10一and 12-day rats.With the increase of embryon age.the expression of HIF-1α and VEGF protein in retina lowed(F=56.70,P<0.01；F=60.78.P<0.01).Compared with the adult rats,the expressions of HIF-1α and VEGF protein in retina were higher from embryon 0-day through 20-day rats(all P<0.01).The significantly positive correlation was found in the expression level between HIF-1α and VEGF protein throughout the experimental duration(r=0.96,P=0.00).Followed the same pattern,the expression levels of HIF-1α and VEGF mRNA in retinas were also enhanced in the embryon 10- and 12-day rats.Identically,a gradually weakened trend was seen in the expressions of HIF-1 α and VEGF mRNA in retinas as the increase of gestational age of rats(F=68.84,P<0.01；F=96.49,P<0.01),and the exDressions of HIF-1 α and VEGF mRNA decreased in the adult rats compared with different embryon-phase rats,showing a statistically significant difference between them(all P<0.01). Conclusion The expressions of HIF-1 αand VEGF in retina appear a dynamic alteration from hish to low during the embryonic development of rat retina,indicating that HIF-1α/VEGF pathway might participate in the process of embryo development of rat retina.

Background Erythropoietin (EPO) was proved to be express in hematopoietic tissue and nervous system and play the effects of stimulating blood cell production and protecting nervous tissue.Researches showed that EPO is expressed in the embryon brain of animal.However,whether EPO exist in nervous-derived retina and its action on retina with the development is concerned. Objective This research was to investigate the expression of EPO during the embryonic development period of rat retina and explore the role of EPO in retina development process.Methods Clean Wistar rats with pregnancy for 12 days,16 days and 20 days were collected,and the embryonic 12-day rats (E12 d,5 rats),embryonic 16-day rats (E16 d,5 rats) and embryonic 20-day rats ( E20 d,5 rats) were obtained by caesarean operation,and 5 12-month W istar rats were used as controls.The rats were sacrificed by cervical dislocation and the retinal sections were prepared in the different-embryo-phase (12 d,16 d,20d) and growth phase.The expression of EPO protein and mRNA in rat retina was detected by immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR),respectively.The feed and use of the animals followed the Regulation for the Administration of Affair Concerning Experimental Animals by State Science and Technology Commission.Results EPO was positively expressed in the cytoplasm and nuclei in the neuroepithelial layer and pigment epithelium of every-embryo-phase rats but only in retinal ganglion cell layer in 12-month-old rats.The gray scale values of EPO expression in retina were 105.55±10.35,99.35± 8.71,83.27± 7.84and 30.30± 3.80 in E12 d rats,E16 d rats,E20 d rats and 12-month-old rats respectively with a statistically significant difference (F=76.13,P＜0.01 ).RT-PCR revealed that the relative values of EPO mRNA expression in retina were 0.876±0.10,0.861 ±0.09 and 0.256±0.03 in E16 d rats,E20 d rats and 12-month-old rats respectively,presenting a elevated value in embryonic rats compared with adult rats ( P =0.00).Gel imaging deletion showed that the A value of EPO amplification products was highest in E16 d rats and lowest in adult rats.Conclusions The expression of EPO appears a high to low fashion during the embryonic development of Wistar rats,which is closely associated with the developing procedure of retina.

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Objective To assess the application of echocardiography in mini-invasive surgical device closure of ventricular septal defect (VSD). Methods 73 VSD patients including 35 with aneurysm formation and among them 21 with multi-defects in the aneurysm were treated by mini-invasive device closure. A closure device was positioned to the defect through parastemal mini-incision in all patients. TEE was used to monitor the whole procedure, to guide the device positioning and to evaluate the curative effect instantly after operation. All patients were evaluated by TTE one year postoperatively. Results All patients were successfully positioned closure devices by TEE guiding. 9 cases were found with trace to small amount residual shunt instantly after operation. 7 cases still had small amount residual shunt at the time of 48 hours after the operation. In the one year follow-up, 4 cases had residual shunt, but the size and volume of left ventricle were significantly reduced than those before operation, and the pulmonary artery systolic pressure was also reduced. Conclusion Echocardiography possesses an important role in preoperative indication screening, intraoperation monitoring and evaluating the curative effect postoperatively.

OBJECTIVETo investigate the effect of different pH on rectum permeability of chlorogenic acid and geniposide.

METHODFour kinds of Reduning suppositories of different pH were separated and put into the rectum to study the suppositories in vitro and the content of chlorogenic acid and geniposide samples was determined by HPLC to calculate the permeation in 24 hours.

RESULTWith increase of pH within 2.5-7.4, the steady state flux of chlorogenic acid was increased, but the steady state flux of geniposidesamples was steady.

CONCLUSIONAdjusted the pH can increase the rectum permeability of active ingredients in Reduning auppositories.

Animals ; Chlorogenic Acid ; pharmacokinetics ; Drugs, Chinese Herbal ; pharmacokinetics ; Hydrogen-Ion Concentration ; Iridoids ; pharmacokinetics ; Male ; Permeability ; Rats ; Rats, Sprague-Dawley ; Rectum ; metabolism ; Suppositories ; pharmacokinetics

Objective To study the genetic diversity in Fujian Sanming Sarcandra Glabra from different geographical provenances;To construct genetic relationship diagram.Methods DNA in leaves was extracted by CTAB. Analysis and evaluation of DNA molecular level of 45 samples of different geographical provenances were conducted by ISSR method. POPgen32 software was used to calculate the genetic diversity and establish gene trees. NTSYS software was used to carry out cluster analysis.Results Six ISSR primers amplified 630 bands. Genetic diversity analysis showed that the average effective number of alleles of 45 varieties was 1.620 2;the average Nei's genetic diversity index was 0.364 5;the average Shannon information index was 0.543 2. Each point had different levels of genetic diversity. Nei's genetic diversity index of the maximum value was 0.497 2, and the minimum value was 0.107 8;Maximum Shannon information index was 0.690 3, and the minimum value was 0.219 2. Cluster analysis results showed that 45 varieties and 14 loci band data were the primitive matrix. 630 genetic similarity coefficients between two different species were obtained. The maximum similarity coefficient among different groups was 1.0, and the minimum was 0.516.Conclusion Different varieties of Fujian Sanming Sarcandra Glabra exist abundant genetic variation and has the molecular basis of abundant species. Using 0.610 as the threshold value can divide Sarcandra Glabra from 45 different geographical provenances into 6 groups. The genetic distance and geographical distance was not related.

Objective To investigate the effect of recombinant adenovirus mediatied human endostatin (rAD-GFP-ES)on rats with collagen typeⅡinduced arthritis(CIA),and explore the mechanism of inflamma- tion and cytokines inhibition on rats CIA.Methods The rAD-GFP-ES was amplified and purified.The model of rat CIA was induced by intradermal injection of typeⅡcollagen combined with complete Freund's adjuvant(CFA). On the second day after the injection,the therapeutic administration of rAD-GFP-ES(1?10~(11)pfu?kg~(-1)?week~(-1)?4 weeks)were performed to the rats.The mean arthritis index(AI)was scored every week since then.The relative concentrations of ES,IL-I?,TNF-?in sera collected at the fourth week were evaluated by western blotting. Results①The titer of the purified rAD-GFP-ES and rAD-GFP was 6.6?10~(12)pfu/ml and 4.8?10~(12)pfu/ml,re- spectively(A_(260nm)/A_(280nm)＞1.3).②The concentration of ES in sera of the group treated with rAD-GFP-ES was 2.4-lold higher compared to the normal group.③The mean arthritis index of the group treated with rAD-GFP- ES was much lower than that of the model group.The administration of rAD-GFP-ES could significantly de- creas the production of IL-1?and TNF-?in sera.Conclusions①The rAD-GFP-ES is efficiently expressed in vivo.②The rAD-GFP-ES has an inhibitory effect on the arthritis index of rat CIA.③IL-1?and TNF-?are involved in the pathogenesis of RA.The rAD-GFP-ES has an inhibitory effect on the expression of IL-1?and TNF-?in rat CIA.

Background Retinal microvascular pericytes (RMPs) have been played increasing attention as an emerging key in pathogenesis of various retinal angiogenic diseases including diabetic retinopathy,and RMPs are thought to be a potential target for treatment.Yet the study has been hindered by the difficulty of obtaining source of tissue and isolating pure population.Objective This study was to establish a simple method of isolation,purification and cultivation of primary RMPs for rat.Methods Eyeballs were extracted from clean male Sprague Dawley rats and immersed by 75％ alcohol for 1 minute.The retinas were isolated and mechanical morcel.Trypsin (2.5 g/L) was firstly used and followed by type Ⅰ collagenase (2 g/L) for the digestion of the retina for 15 minutes,respectively.Retinal microvascular fragments were screened by 100 μm and 55 μm filter screen.DMEM containing 20％ fetal bovine serum was added for the cultivation and passaged of the cells.The cells were purified by exchanging medium and partial enzymatic digestion.The morphology and growth status were monitored under the phase contrast microscope,and α-smooth muscle actin (α-SMA),platelet-derived growth factor receptor-β (PDGFR-β),yon Willebrand factor (vWF),glial fibrillary acidic protein (GFAP) antibodies were used for the identification of RMPs.Results RMPs migrated out of fragments after 24-48 hours of plating.On day 7,RMPs appeared in primary cultures as loose colonies.The cells reached confluence to about 80％-90％ on day 14-16.The subcultures grew faster than the primary and reached confluence on day 12-14.The culture showed typical morphology of pericyte with large irregular triangular cell body and multiple long processes,and they could be repeatedly passaged 9 times without obvious loss of characteristic phenotype.Fluorescence assay exhibited that 96％ of the cells showed positive immunofluorescence for α-SMA and PDGFR-β,confirming the purity of RMPs in culture.However,only a few of them were positive for GFAP and the cells response for vWF was absent.Conclusions High purity of rat RMPs can be obtained easily by our method without high cost-consuming.Hcrc wc cstablished a simple mcthod for the primary culture of rat RMPs.

This study investigated the mental health status of medical students in China, and analyzed the influencing factors in order to provide evidence for mental health education for medical students. A stratified cluster sampling method was used to recruit medical students from Huazhong University of Science and Technology, China. The questionnaire survey on general information and Symptom Checklist 90 (SCL-90) were used for investigation and analysis. The results showed among the 1137 valid questionnaires, 278 (24.45%) participants had SCL-90 score ≥ 160. The top three mental problems of medical students were obsessive-compulsive disorder, interpersonal sensitivity and depression in terms of the factor score ≥ 2.5 and the number of participants who reflected on the diseases. The third-year medical students had the worst mental health status, and fifth-year medical students had the best mental health status. Students from rural area had more psychological problems than those from urban area; furthermore, students with high professional satisfaction, those who were the single child of the family, non-poor students, and those whose parents had high education level had better mental health status. It was concluded that the mental health of medical students is not optimistic in China. Medical students have some mental health problems of different degrees. Factors that influence the mental health of medical students include academic pressure, professional satisfaction level and family environment.