[Objective]To study the possibility of differentiation of rabbit marrow mesenchymal stem cells(MSCs)into endothelial cells in vitro.[Method]BMSCs of rabbits were obtained by using gradient centrifuge method.The adhesive cells were preserved to passage culture to get pure MSCs.MSCs in the second generation were used.After induction with vascular endothelial growth factor(VEGF),microscopic exarm,cytoimmunofluorescent staining confirmd the trial group cells becomes to endothelial cells.W-P corpuscles which was the symbol of endothelial cells were observed by transmission electron microscope.[Result]The differentiated cells demonstrated the characters of endothelial cells under phase contrast microscopy.The cytoimmunofluore-scent staining showed that the trial group cells were induced to endothelial cells.W-P corpuscles could be seen under transmission electron microscope.[Conclusion]The adult rabbit BMSCs can present features of endothelial cells in certain induction medium,they are ideal donor cells of tissue engineering vascularization.

To treat hallux valgus, minimally invasive osteotomy on 1st metatarsal neck,immobilization with "8-shape" bandagev was performed, and the effect was definited. The principles of osteotomy stability were analyzed from the osteotomy position, methods, direction and angle. The grinding drill was used to increase friction coefficient between the ends of osteotomy. Correct direction of osteotomy and suitable angle were the key point of stability. The immobilization with "8-shape" bandage complied with the principle of elastic fixation created the conditions for the slight movement of the osteotomy ends. Compared with internal fixation ,it was better on osteotomy healing,and the osteotomy ends were stable and healed with cartilage
Fracture Fixation, Internal ; methods ; Hallux Valgus ; physiopathology ; surgery ; Humans ; Metatarsal Bones ; physiopathology ; surgery ; Minimally Invasive Surgical Procedures ; methods ; Neck ; physiopathology ; surgery ; Osteotomy ; methods ; Wound Healing

Objective To research the choroidal neovascularization (CNV)in TgAPPswePS1 transgenic mice after intensive light exposure injury.Methods Twenty TgAPPswe/PS1 transgenic mice at the age of 6 months were grouped for experiments.The treated groups of 12 mice were treated by a source of 10 000 lux cool full spectrum light for 6 months,12 hours per day;While the control groups of 8 mice were kept in normal conditions.The mice eyes of the experimental group and control group were examined with HE/Toluidin blue staining,the retinal structure was observed,and the number of CNV was counted.The expression of VEGF and Aβ were examined with immunofluorescence on the retinal pigment epithelial (RPE) flat mount.All of the results were quantified and statistically analyzed.Results After treated by 6 months of intensive light exposure in the experimental group,histopathological analysis has found significant loss of outer nuclear layer/photoreceptor out segment and outer plexiform layer as compared with the control group;At the same time,abnormal hypo-and hyper-pigmentation,vacuoles and disruption in the RPE layer,remarkable CNV were found in the experiment group by Toluidin blue staining,and the incidence of CNV was 18.75％.The VEGF expression domenstrated.a diffusive and deposition pattern along the neovessels which showed a significant increase of (6.59 ± 1.14) fold changes as compared with the control group.The difference was statistical significant (P ＜ 0.05).Then the Aβ deposits were positive expressed in the RPE layers after intensive light exposure treatment,and pathological deposition of Aβ in the RPE showed plaque like displayed by confocal Z-stack microscopy,and the drusenoid Aβ deposits were found alone with the neovessels on the RPE flat mount.The deposition of Aβ protein increased with (6.45 ± 2.93) fold changes as compared with the control group,and the difference was statistical significant.Conclusion CNV with degenerative changes in the outer retina can be induced by intensive light exposure in the APPswe/PS1 transgenic mouse.These results suggest that an Alzheimer's transgenic animal model might be an alternative animal model for CNV if combined with intensive light exposure.

Objective To investigate the effects of glycyrrhizin on gene expression of transforming growth factor(TGF)-?signaling pathway of hepatic stellate cell(HSC)in mice by gene microarray tech- nique.Methods The HSCs were isolated from mice and cultured in vitro.Then the mice were divided into control group,TGF-?_1 group(5 ng/ml) or TGF-?_1(5 ng/ml)combined with glycyrrhizin(100?mol/L) group.The cells were collected after 10 hours to extract RNA.A cDNA microarray(GEArray~(TM) Q) targeting TGF-?/BMP signal transduction was used to screen the genes which showed significant changes in expression of TGF-?pathway of HSC by glycyrrhizin.Results The microarray analysis showed that 16 genes(16.7%),such as Smad2,Smad3,Smad7,CoL3A1,CoL1A2,and PAI-1,were upregulated by TGF-?_1 and then down-regulated by glycyrrhizin.Five genes(5.2%)(including BMP7,IGFbp3 and etc.)downregulated by TGF-?_1,were then up-regulated by glycyrrhizin.Finally,2 genes upregulated by TGF-?_1 were then up-regulated predominantly by glycyrrhizin in HSC(T?R2,betaglycan).Changes in some genes,such as Smad2 Smad3,Smad7,were further confirmed to be coincided with cDNA microarray by semi-quantitative RT-PCR.Conclusions The anti-fibrosis mechanisms of glycyrrhizin may be through to interference of TGF-?signaling pathway,decrease the synthesis and increase the degradation of collagen.

Objective To explore the diagnosis and management of ruptured abdominal aortic aneurysm(RAAA).Methods Twelve patients with RAAA treated in past 7 years were revienled retrospectively.The main clinical manifestations were abdominal pain and / or back pain,low blood pressure or shock,and pulsating abdominal mass.All cases were accurately diagnosed with CT and 7 were treated by conventional operation,one by EVAR,and the other 4 did not receive surgical treatment.Results Perioperative death occurred in 5 cases(mortality rate was 62.5%) in 8 surgical treated patients,including circulatory failure in 2 cases,renal failure in 1 case,and multiple organ failure in 2 cases.All the 4 patients treated with nonoperative method were dead.Conclusions Surgical operation in RAAA cases still carried a high mortality.Early dignosis,appropriate resuscitation,urgent surgical repair,reduction of operative time,and infrarenal clamping are measures conducive to lowering the mortality rate of RAAA.EVAR has the potential to reduce the mortality rate from RAAA.

Objective To investigate the function of middle-methoxyl pectin-Ca2+ complex in(Graduate School,Chinese Academy of Science,Beijing 100039;1 Polymer Engineering Laboratory,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China) lowing postprandial serum glucose of normal and impaired glucose tolerance(IGT) rats.Method The experimental IGT rats models were made by injecting STZ into abdomen.Then normal and IGT rats were given test meal and their postprandial serum glucose were measured.Results The middle-methoxyl pectin-Ca2+ complex could significantly improve the glucose tolerance and weaken the peak value of postprandial serum glucose of normal and IGT rats(P

Objective To determine the clinical value of real time interventional ultrasound guidance in family planning reproduction operation.Methods Under the guidance of ultrasound monitoring,522 cases with high risk and difficult uterine operation were undertaken in our department.Results The abdominal endoscopic contraceptive uterine operation under real time ultrasound monitoring was carried out for 522 cases in 4 years,with successful rates for high risk pregnancy as 287/289 cases,high risk troublesome withdrawal of contraceptive ring as 129/130 cases and puzzling uterine operation as 103/103 cases.The total successful rate reached 99.42%,without uterine rupture and other complications.Conclusion The former complex,blind and difficult uterine operations turn to be simple,safe and reliable under the guidance of real time ultrasound.

Objective To observe the effect of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on cholesterol gallstones formation in C57BL/6 mice with diet-induced cholesterol gallstone,and then explore the potential mechanism.Methods Fifty C57BL/6 mice were randomly divided into 5 groups (10 mice in each group),referring to control group,experimental group,experimental plus DHA group,experimental plus EPA group,as well as experimental plus DHA and EPA group.The mice in control group were fed with regular diet,and the rest of the mice with lithogenic diet (LD).Subsequent to feeding the mice with separate diets for two weeks,EPA and/or DHA (70 mg · kg-1 · d-1) were orally administered for eight weeks,while the LD feeding was continued during this period.After a total of 10 weeks,the mice were dissected to observe the gallstone formation.The levels of serum lipids,total cholesterol (TC) and phospholipids (PL) in bile,and TC in the liver were tested,and the protein expression of HMGCR,SRBI,ABCG5/ABCG8,CYP7A1 and ABCB11genes in the liver of mice was measured.Results Compared with the experimental group,the experimental plus EPA group had significantly lower TC in liver (0.033 ±0.008 mmolo/g) and bile (1.807 ±0.381 mmolo/L),and lower relative protein expression levels of HMGCR (0.545±0.098),ABCG5 (0.418±0.089) and ABCG8 (0.501 ±0.151)in liver (P＜ 0.05).The contents of TC in liver and bile,and the protein expression of HMGCR,ABCG5andABCG8 in liver were 0.048 ± 0.006 mmol/g and 2.662 ± 0.339 mmolo/L,and 1.011 ± 0.213,1.037 ± 0.276 and 1.266 ±0.312,respectively.No significant differences were observed between experimental plus DHA group and experimental group (P ＞ 0.05).Conclusions EPA could prevent the cholesterol gallstone formation in mice by decreasing the expression of HMGCR and ABCG5/8 genes in liver,therefore reducing cholesterol synthesis and blocking cholesterol transport from liver to bile as well as diminishing cholesterol content in the bile.However,the inhibition effect of DHA on cholesterol gallstone formation was not obvious.

Objective To research the functional and structural change in TgAP-PswePS1 transgenic mice after intensive light exposure insult.Methods APPswe/PS1 transgenic mice at the age of 6 months old were grouped for experiments,the transgenic mice were replaced by light insult device for 6 months,while the control mice were kept in normal conditions.After 6 months light exposure,the eyes of control and experimental mice were examined with electroretinography (ERG).The retinal morphology change was investigated with H&E staining.All of the results were quantified and statistically analyzed.Results In the control group,the amplitudes of a and b wave in the rod response were (18.33 ±3.53) μV and (107.58 ± 14.72) μV,while (64.80 ±7.57) μV and (178.76 ± 14.47) μV for the amplitudes of a and b wave in the maximum response;After treated by 6 months of intensive light exposure,in experimental group mice,the amplitudes of a and b wave in the rod response were (17.92 ±4.89) μV and (21.83 ± 5.51) μV;While in the maximum response a striking decrease was detected with a wave (18.23 ±4.44) μV and b wave (24.50 ± 4.49) μV,by compared with control group,the difference were statistical significant (all P ＜ 0.05).Histopathological analysis found significant loss of outer nuclear layer,photoreceptor out segment,whereas controls remained little change in the retina.And the retinal thickness decreased significantly from (181.32 ± 13.47) μm in control group to (102.34 ±9.38) μm after light insults in experimental group,the difference was statistical significant (P =0.017).Conclusion Intensive light exposure can cause the retinal structural and functional disorder in the AP-Pswe/PS1 transgenic mouse.

Background and purpose:As a member of the catenin family, Delta-catenin protein could promote proliferation and invasion of tumor cells, but the accurate mechanism of Delta-catenin promoting cell proliferation is not clear. In the present study, we illustrated that Delta-catenin’s effect on cell apoptosis and their relationship with mitogen-activated protein kinase (MAPK) signaling pathway, and the possible mechanism was also explored for Delta-catenin promoting invasion and proliferation of tumor cells. Methods:The alterations of p38 and c-jun N-terminal rinasel JNK protein activity were detected in SPC and SK lung cancer cell lines with Delta-catenin overexpression or not, by Western blot method. At the same time, the apoptotic number of tumor cells was also examined by FCM method. Furthermore, the number of invasive tumor cells was examined by Matrigel invasive experiment. Results:Compared with untreated group and empty vector group, the activity of p38 protein was unchanged in lung cancer cell lines with Delta-catenin overexpressed (P>0.05), but the activity of JNK protein was decreased signiifcantly (P<0.05),meanwhile, apoptotic proportion of tumor cells were also reduced (P<0.05), and invasive ability of tumor cells was enhanced signiifcantly (P<0.05). Conclusion:Delta-catenin probably decreases apoptosis number of lung cancer cells via inhibiting the activity of JNK pathway, and then promotes invasive ability of tumor cells.