Background High myopia is seriously harmful to visual function.To explore the mechanism of high myopia is significant for the prevention and treatment.Complement proteins C1q and C3 have emerged as critical mediators of synaptic refinement and plasticity,however,their effects in retina on myopia remain elusive.Objective This study was to investigate the expressions of complement factors C1q and C3 in the retina with negative lensdefocused myopia in guinea pigs.Methods The use and care of animals complied with the application of Peking Union Medical College Hospital Iaboratory Animal Welfare Ethics Committee.Twelve 3-day-old pigmented guinea pigs were assigned randomly to the lens-defocused group and the normal control group.The left eyes were covered by -10 D PMMA lens for 4 weeks as the defocused eye group,and the right eyes were covered using 0 D PMMA lens in the same way as the fellow control eye group.The right eyes of the normal guinea pigs were used as the normal control eye group.The refractive diopter of guinea pigs was examined by retinoscopy.The animals were sacrificed at the fourth week and the expressions of complement C1q and C3 in the retinas of guinea pigs were detected by Western blot.Results The diptors were (-1.21±0.71)D,(+2.46±0.75)D and (+1.75±0.50)Din the defocused eye group,normal eye group and the fellow eye group at the fourth week,showing a significant difference among the groups (F=51.55,P=0.69),and diopters were insignificantly different between the normal eye group and fellow eye group (q =2.62,P=0.08).However,the diopters of the defocused eye group were significantly higher than those of the fellow eye group (q =10.92,P＜0.01).The expressions of C1q and C3 proteins in the retinas were significantly different among the defocused eye group,fellow eye group and normal eye group (C1 q:F=8.810,P =0.003;C3:F =14.490,P＜0.001),and expression levels of C1q and C3 proteins in the defocused eye group were significant higher than those of the fellow eye group (C1q:q=4.14,P=0.01 ;C3:q=4.71,P=0.005) ;while no significant differences were found between the fellow eye group and the normal eye group (C1q:q =1.61,P =0.27; C3:q =2.82,P =0.070).Conclusions The expression levels of C1q and C3 up-regulate in the retinas with lens-defocused myopic animal model.Excessive complement activation in retinas may be involved in the development of myopia.

Objective To study the impact of F000 on cited papers in medical journals. Methods Papers in the 4 years after they were published from 2006 to 2008 that were recommended by F1000 served as No. 1 control group, papers in the 4 years after they were published from 2006 to 2008 that were not recommended by F1000 served as No. 2 control group, Web of Science-covered papers in the 1-6 years after they were published from 2006 to 2008 served as group 3. The cited papers in group 3 were calculated. The total cited papers in the first 3 years and the second 3 years after they were published were analyzed with SPSS 11. 0 and identified by paired t test. Results The number of cited papers reached its peak in the 4th year after they were published. The number of cited papers reached its peak in the third year after they were published in No. 1 and No. 2 control groups. Paired t test showed no significant difference in the number of cited papers in group 3 from that in No. 1 and No. 2 control groups. How-ever, the number of cited papers and that of total cited paers in group 3 were significantly different from those in No. 1 and No. 2 control groups. Conclusion F1000 can significantly influence the citation behaviors in medical journals.

Objective To investigate the effect of different explants on emodin contents in the callus of Polygouum cuspidatum by reverse-phase HPLC. Methods The leafs,stems and leaf stalks of Polygouum cuspidatum were used as explants and induce the callus by MS medium containing 6-BA 0.2 mg/L,KT 0.2 mg/Land 2,4-D 0.5 mg/L. The contents of emodin were analyzed by HPLC. The separation was performed on Diamonsil-C18 (250 mm?4.6 mm,5 ?m) column,using methanol-0.1% H3PO4 (80∶20) as mobile phase,detected at 254 nm. The flow rate was at 1.0 mL/min,the column temperature was 27 ℃. Results The contents of emodin were 0.709 6,1.680 0 and 0.166 8 mg/g in the callus induced by leafs,stems and leaf stalks. The linear range of emodin was 0.25～5 ?g/mL,r=0.999 85,the average recovery was 101.19% and RSD was 1.20%. Conclusion HPLC method could be used for the contents determination of emodin in Polygouum cuspidatum callus and the contents of emodin was high in the callus induced by stems.

PurposeTo explore the multislice CT (MSCT) and clinical manifestations of diaphragmatic hiatus hernia with hernial sac effusion, in order to improve its diagnostic rate.Materials and MethodsMSCT data were retrospectively analyzed for morphologies and clinical manifestations in 32 patients with diaphragmatic hiatus hernia and hernial sac effusion.Results32 patients included 21 males and 11 females (χ2=0.64,P>0.05). 25 patients were older than 60 years and 7 cases younger than 60 years (χ2=13.58,P<0.01). There were 27 cases with non-viscera hiatus hernia including 23 cases of combined fat-water hernia and 4 cases of simple effusion. 5 cases were of viscera type hiatus hernia (χ2=5.47,P<0.05). 28 cases showed ascites including 23 cases with non-viscera hiatus hernia and 1 case with viscera type hiatus hernia (χ2=9.56,P<0.01). The axial images from different levels of non-viscera hiatus hernia with liquid hernial sac demonstrated quasi-circular, meniscus, ringlike and teardrop shapes.Viscera type hiatus hernia and liquid hernial sac were found to be irregular shape . All patient sufferered from dysphagia, chest distress and epigastric discomfort.ConclusionThe increased pressure gradient between thorax and abdomen driving ascites into supradiaphragmatic hernial sac and clamping by hiatus may be the main mechanism. Quasi-circular, meniscus, ringlike andteardrop were the characteristic signs of diaphragmatic hiatus hernia with hernial sac effusion.

OBJECTIVE:To establish the quality standards for Shenshuaikang granule. METHODS:TLC was used for the quali-tative identification of Astragali Radix and Rhei Radix et Rhizoma in the preparation. HPLC was used for the contents determina-tion of emodin and chrysophanol ,the column was Agilent HC-C18 with mobile phase of methanol-0.1% phosphoric acid (85:15 , V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 254 nm,the column temperature was 30 ℃ and the injection vol-ume was 10 μl. RESULTS:TLC showed clear spots and good separation. The linear range was 1.9-60.8 μg/ml for emodin(r=0.999 9, n=6) and 1.6-51.2 μg/ml for chrysophanol (r=0.999 9),RSDs of precision,stability and reproducibility tests were lower than 3%,recoveries were 95.76%-103.66%(RSD=2.83%,n=9)and 97.24%-104.34%(RSD=2.65%,n=9),respectively. CONCLU-SIONS:The standard can be used for the quality control of Shenshuaikang granule.

Objective To explore the role of HIF-1 and its downstream SDF-1α/CXCR4 and VEGF/VEGFR pathway in mediating MSC mobilization with DMOG .Methods Male SD rats were randomly divided into five groups:Normal saline control group , DMOG group, YC-1 group, AMD3100 group, SU5416 group.We used CFU-F assay and flow cytometry to determine the number of MSCs in rat bone marrow ( BM ) and peripheral blood ( PB ) in each group , respectively.The concentrations of SDF-1αand VEGF both in BM and PB serum in each group were detected by ELISA . Western blotting was used to test protein levels of HIF-1α, SDF-1αand VEGF in BM.Results Compared with NS group, the number of CFU-Fs as well as the percentage of CD 45 -CD90 +cells increased in DMOG group ( P <0.05);Compared with DMOG group, the number of CFU-Fs as well as the percentage of CD 45 -CD90 +cells decreased in YC-1 group, AMD3100 group and SU5416 group (P <0.05).Compared with DMOG group, the concentration and protein expression of HIF-1αdecreased significantly in YC-1 group ( P <0.05 ) , the concentration and protein expression of SDF-1αdecreased significantly in AMD 3100 group ( P <0.05 ) , the concentration and protein expression of VEGF decreased significantly in SU5416 group ( P <0.05 ).Conclusion DMOG can induce MSCs mobilization possibly via up-regulating the expression of HIF-1αand activating its downstream SDF-1α/CXCR4 and VEGF/VEGFR pathway .

Objective To explore extracellular signal-regulated kinase ( ERK1/2 ) expression in the role of curcumin inhibited staurosporine (STS)-mediated neurons toxic injury through added PD098059, and to clarify ERK1/2 mediated inhibitory role of curcumin on STS-induced neurons toxic injury.Methods The neurons toxic injury model of primary cultured hippocampal neurons was established by STS.The experiment was divided into six groups:normal control group, STS model group, PD098059 +STS model group, curcumin +STS pretreatment group, curcumin+PD098059+STS treatment group and curcumin treatment group.The cell viability were determined by MTT method, lactate dehydrogenase (LDH) release rate, cell toxicity were detected, nuclear shape were observed by DAPI staining, and ERK1/2 expression were detected by Western blot method.Results The cell viability of curcumin +STS pretreatment group was significantly higher than STS model group ( P <0.001 ); the cell viability had no significant difference between PD098059 +STS model group and curcumin +PD098059 +STS treatment group;compared with curcumin +STS model group , the cell viability of curcumin +PD098059 +STS treatment group was significantly decreased ( P<0.001 ).LDH results showed that the nerve cell toxicity of curcumin +STS pretreatment group was obviously less than STS model group (P<0.001).The cell nuclear shape showed typical apoptosis morphological characteristics in STS model group, and curcumin inhibited the effect of STS mediated-neuronal apoptosis.ERK1/2 protein expression in curcumin +STS pretreatment group significantly increased compared with STS model group ( P <0.001 ) .Conclusion Curcumin inhibited STS-mediated neurons toxicity injury by up-regulating ERK1/2 expression.After PD098059 blocking the nerve cells ERK1/2 synthesis, the inhibitory action of curcumin failed to implemented, which illustrated that ERK1/2 mediated curcumin to inhibit STS-induced neuronal toxic injury.

ObjectiveTo summarize the experience of percutaneous nephrolithotomy under flexible ureteroscope in the treatment of staghorn calculi.Method The clinical data of 30 patieits with staghorn calculi undergoing percutaneous nephrolithotomy under flexible ureteroscope were reviewed for summarizing the surgical cooperation experience.Results All operations were successful,with the clearance rates of stage one and stage two calculi 86.0% and 95.0%,respectively.There occurred one case of massive hemorrhage,but no cases of kidney perforation,peritoneal perforation,liquid pneumothorax or organ damage.Conclusion Well-prepared surgical cooperation,full mastery of surgical procedures and skilled cooperation can increase surgical efficiency and safety by shortening surgical duration.

Objective To investigate the perceptions of medical staff about chemotherapeutic symptoms in children with leukemia.Method Sixty-one doctors and nurses were involved in the investigation using a self-designed questionnaire on uncomfortable symptom scale.Result The main symptoms of chemotherapy included hair loss,poor appetite,nausea,vomiting, oral mucositis and fatigue.Conclusion Chemotherapeutic symptoms are common in children with leukemia and need appropriate nursing management.

Objective To study the changes of mesenteric arterioles on the contractile response to norepinephrine in patients with cirrhosis and portal hypertension (PHT) caused by hepatitis B after treatment by high-dose vitamin C.Methods Eleven PHT patients and 6 non-PHT volunteer were those undergoing their respective surgeriesat in our hospital from January 2010 to June 2011.The PHT patients were randomly assigned to vitamin C treatment group and placebo treatment group.After admission and before induction of anesthesia,blood taken to mesure plasma concentration of malonaldehyde (MDA).Intraoperative portal pressure was measured.We took the third level intestinal mesentery vessels with their mesentery next to the jejunum and studied the contractile response to norepinephrine of the intestinal mesenteric arterioles.We also measured RhoA/ROCK pathway associated proteins' expression and activity changes by Western-blot method.Results The average value of the plasma MDA of PHT patients with cirrhosis was much higher than that of non-PHT patients.After treatment by vitamin C,the value decreased.The dose-response curve of isolated mesenteric arterioles to norepinephrine from PHT patients with cirrhosis shifted to the right,and the EC50 value was higher than that of non-PHT patients.But this phenomenon was reversed after the patients treated with vitamin C.The protein expression of RhoA in mesenteric arteries did not change significantly among the three groups.But the protein expression and activity of ROCK-1 was significantly reduced in PHT patients with cirrhosis.After treatment with vitamin C,the expression and activity of ROCK-1 in mesenteric arteries of cirrhosis was significantly increased.Conclusion The PHT patients with cirrhosis are in the situation of oxidative stress.The high-dose vitamin C treatment can reduce oxidative stress level and improve contractile hyporeactivity of mesenteric arterioles of PHT patients with cirrhosis to norepinephrine.The protein expression and activity increasement of ROCK in RhoA/ ROCK pathway is involved in thisphenomenon.