Vascular endothelial growth factor (VEGF) is an endothelial cell-specific mitogen.Studies have shown that VEGF is closely associated with ischemic stroke,and this makes it possible to intervene in ischemic stroke from the level of VEGF and its receptor.This article reviews the biological effect of VEGF and its receptor,mechanism of action involving in various stages of ischemic stroke,and the therapeutic prospect in ischemic stroke.

AIM: To observe the effects of scleral buckling surgery for retinal detachment under microscope and under indirect ophthalmoscope.
METHODS: Forty - six patients ( 46 eyes ) with rhegmatogenous retinal detachment were retrospectively analyzed. Twenty-six patients received surgeries under microscope was retrospectively analyzed and compared to that of 20 patients who received surgeries under indirect ophthalmoscope by the same operator.
RESULTS: No statistical difference was found in patients' operation method choice, including condensation reaction reattachment situation and the retina reset operation at a time ( P> 0. 05 ). The best corrected visual acuity of microscopic group after 1mo of operation was better than before operation, and the improving rate of vision after operation was higher than that of the traditional group (P<0. 05).
CONCLUSION:The curative effect of external approach microsurgery has the similar efficacy with the conventional external approach surgery, and gets better visual acuity.

? AlM: To analyze the reason of corneal epithelial implantation and ingrowth after laser in situ keratomileusis ( LASlK ) , and summarize the treatment experiences.
?METHODS: The clinical data of postoperative corneal epithelial ingrowth on 18 cases (30 eyes) from 1 256 cases (2 256 eyes) after LASlK were retrospectively analyzed in our hospital from January 2008 to December 2012. After the treatment of all eyes, patients’ general visual quality scores before and after treatment were analyzed.
?RESULTS:There were 18 cases ( 30 eyes ) with corneal epithelial implantation and ingrowth after LASlK, and the incidence rate was 1. 3%. ln the 18 cases (30 eyes), there were 12 eyes corneal flap epithelial ingrowth caused by postoperative trauma, 12 eyes caused by multiple corneal flap flush, 2 eyes caused by intraoperative irregular corneal flap, and nothing special for 4 eyes. The classification of corneal epithelial ingrowth of 30 eyes:grade I, 11 cases (18 eyes);gradeII, 4 cases (8 eyes);grade Ⅲ, 3 cases ( 4 eyes ) . Grade I-II were treated with TobraDex eye drops and intraocular pressure lowering drug. Grade Ⅲ firstly were treated by drugs, otherwise by surgery if it didn’t improve. After treatment, 8 cases (13 eyes) epithelial ingrowth disappeared from 11 cases ( 18 eyes ) , 3 cases ( 5 eyes ) implanted epithelial tumor shrank in grade l;epithelial implantation of 2 cases (4 eyes) in grade II disappeared, implantation degree of 2 cases (4 eyes) reduced to grade I;2 cases (2 eyes) in grade Ⅲ had 0. 5 ~ 1mm wide flap edge shallow gray ribbon 1 mm inside the limbus, visual acuity was 0. 8 ~1. 2, 1 case ( 2 eyes ) treated with curettage corneal epithelial implantation and endophytic epithelium hadn’t relapsed in the follow-up. After the treatment, 18 cases of corneal epithelial ingrowth got lower visual quality scores than those before therapy (Hc=10. 511, P<0. 01).
?CONCLUSlON: Operation standardized, postoperative early detection and aggressive treatment are important for prevention and treatment of complications after LASlK.

ObjectiveTo develop the facility of mammalian cell culture in hypothermia for long-term, and to lay the base for carrying mammalian cells to outer space and establishing outer space biomedical research stage. MethodsMultiple cell lines were maintained in the spacial designed hypothermia cell culture facility and carried to space by Shenzhou 4 and No.18 recoverable satellite. Cell morphology, cell multiplication and the ability to be monocloned were observed.ResultsCells were successfully maintained in the hypothermia cell culture facility for up to 26 days without obvious changes of cell morphology. The cells could normally grow, multiple and be monocloned after inoculated in 37 ℃ for 8 h.ConclusionA hypothermia cell culture facility was successfully established,which ensure technically mammalian cells to be carried by space craft and further research on space radiation.

Objective To investigate the effects of Kinesio taping on function of knees in girls. Methods 20 female students were tested the peak torque of centripedal and eccentric contraction of knee flexion and extension with Biodex isokinetic testing at 60°/s angular velocity, with Kinesio taping, placebo taping and without taping. Their amplitude root of mean square (RMS) of surface electromyography of vastus medialis (VM), rectus femoris (RM) and vastus lateralis (VL) were also recorded. Results For centripedal isokinetic contraction, the relative extensors peak torque was the most as Kinesio taping (P<0.01). There was no significant difference in relative flexor peak torque (P> 0.05). Standardized RMS of VM and VL were the least as Kinesio taping (P<0.01), but not significantly different of RF among all the conditions (P>0.05). For eccentric isokinetic contraction, the relative extensor peak torque of both extensors and flexors were the most as Kinesio taping (P<0.01), while the Standardized RMS of VM and VL were the least (P<0.01), but no significant difference was observed in RF (P> 0.05). Conclusion Kinesio taping may enhance the strength of centripedal, eccentric contractions of quadriceps and eccentric contractions of hamstring, and increase the muscle fibers recruitment of VM and VL.

Objective To study the effect of the long-term operation of a nuclear power plant (NPP) on population health,and to collect the health related data of the population around (NPP).Methods Four research areas,named 0-10 km area,10-20 km area,20-30 km area and control area,were set up interms of the distance from the nuclear power plant.Human blood samples were collected to detect chromosome aberration and lymphocytes subsets.Results The rates of cells with chromosome aberration at 0-10 km area,10-20 km area,20-30 km area and control area were 0.157％,0.167％,0.070％ and 0.111％,respectively.The differences of rates in the four areas were not statistically significant.The percentages of T lymphocytes,helper T lymphocytes,suppressor T lymphocytes,B lymphocytes and natural killer lymphocytes were all normal.The difference of percentages among 0-10 km area,10-20 km area,20-30 km area were not statistically significant.Conclusions In the operational condition,less significant impact is caused to the population around nuclear power plant.

Objective To explore the effect of scoliosis-specific exercises ( SSE) on patients with mild ado-lescent idiopathic scoliosis ( AIS) . Methods Thirty patients with mild AIS were assigned to a control group ( n=10) or an SSE group ( n=20) . The control group received routine health education, while the SSE group completed a 60-minute set of SSE 2 to 3 times a week for 12 weeks. The angle of trunk rotation ( ATR) , maximum Cobb angle and angle of vertebral rotation (AVR) were recorded. Bone strength parameters including the speed of sound (SOS), Z-score and percentile distal radius were measured. Surface electromyography ( sEMG) was performed for the erector spinae muscle. In addition, forced vital capacity ( FVC) and forced expiratory volume in one second ( FEV1) were measured and compared with the predicted values ( FVC/pred% and FEV1pred%) . A falling index ( FI) and quality of life ( QOL) were measured. Results Compared with before the treatment, the average maximum Cobb angle in the control group increased significantly after the lessons, but there was no significant difference in any of the other measures, including QOL. For the control group the activation rate of the concave side of the apex level erector spi-nae was significantly lower than on the convex side both before and after the lessons. The SSE group showed no sig-nificant improvement in their average ATR, maximum Cobb angle, AVR or FI results, but their average SOS, Z-score and percentile of the distal radius, FVC, FEV1 and motor function improved significantly after the treat-ment. Before the treatment the activation rate of their concave side was also lower than on the convex side, but after the treatment there was no significant difference between them on average. Conclusion Early SSE can prevent further deformation, promote bone strength, improve lung function reduce the difference in the motor control of the bilateral erector spinae muscles among patients with mild AIS. It can promote a better quality of life and is worth ap-plying in clinical practice.

Objective To study the effects of curcumin mediated photodynamic therapy (PDT)on the growth and proliferation in human cervical cancer cell line H8 in vitro and in vivo,and to investigate its antitumor mechanisms.Methods The effects of curcumin mediated PDT on proliferation of human cervical cancer H8 cell by MTT assay was used to screen the optimal parameter.Changes in cell morphology were observed by May-Gr ünwald-Farbstoff Giemsa staining.The apoptosis rate was estimated by flow cytometry.The effect of PDT by curcumin on the expressions of Bcl-2,P53 and survivin in H8 cells was detected by fluorescence real-time reverse transcription-polymerase chain reaction (RT-PCR).Forty BALB/C nude mice underwent subcutaneous injection of H8 cell line so as to establish animal models,and then were randomly divided into four equal groups:control group,irradiation alone group,curcumin alone group,curcumin PDT group.HE staining and pathological examination were performed.Immunohistochemical study was conducted to detect the protein expression of the apoptosis inhibiting genes of Bcl-2.Results The proliferation inhibition of H8 cells was obvious after PDT when curcumin 5μmol/L with irradiation 100 J/cm2,and with dose dependent manner.Typical morphologic features of apoptosis appeared characterizedly by marked chromatin condensation,nuclear pyknosis and fragmentation,and the appearance of apoptotic bodies.The total apoptosis rate was higher in PDT group [(47.21 ± 4.11)％]than in control group(1.71 ±0.16) ％ (P＜0.01).The mRNA expression of Bcl-2,P53 and survivin in H8 cells were suppressed significantly.HE staining showed remarkable subcutaneous necrosis in the PDT group.Immunohistochemistry showed remarkable down-regulation of protein expression of Bcl-2(P＜0.01).Conclusions Curcumin-mediated photodynamic therapy has a significant killing effect on H8 cells in vivo and in vitro.Its antitumor effect might be related to induction of Tumor cell apoptosis and suppression of Bcl-2 mRNA and protein expression.

Objective To clone lexA gene,express and purify the repressor LexA from Pseudomonas aeruginosa(PA),prepare the polyclonal antibody against PC-1 protein in rabbits,detect immunological activity of LexA protein.Methods The genomic DNA was extracted from the PAO1,the gene fragment encoding the mature LexA was amplied by PCR.It was linked the vector pET32a(+)and expressed in the E.coli BL21(DE3).The expressed protein was purified by two steps of Ni2+ chelate affinity chromatography and gel filtration chromatography respectively.The purified LexA protein immune the rabbits by injection and prepare the polyclonal antibody against PC-1 protein.The immunological activity of expressed and purified LexA protein was detected by ELISA,and Western blot.Results The expressed fused protein was found in insoluble form,accounted for 45% of the total bacteria protein.The final purity was 98.97%,which was determined by the HPLC.The expressed and purified LexA protein had satisfactory immunological activity.

Objective:To optimize the renaturation procedure of denatured LexA,prepare the repressor LexA from Pseudomonas aeruginosa(PA),which have the satisfactory biologic activity.Methods:The LexA was renatured by the GSH/GSSG dilution method,and the renatured protein were purified by Ni2+ chelate affinity chromatography and gel filtration chromatography,following desalination by Sephadex G25 gel column.The renaturation result were detected by the native polyacrylamide gel electrophoresis and RPHPLC.The immunological activity of all LexA proteins,including the denatured,renatured protein and the renatured protein that was treated with the DTT,were determined by Western blot.Results:The renatured LexA appears both monomer and multimer,which is confirmed by the native polyacrylamide gel electrophoresis analysis and RPHPLC.Gel retardation experiments shows that the renatured LexA have satisfactory biologic activity.