Objective To investigate the expression of MMP-2, MMP-9 and TIMP-1. TIMP-2 during the course of traumatie pro- liferative vitreoretinopathy (tPVR) in rat retina treated with GM6001 and without GM6001 and evaluate the interventiunal effect uf GM6001 on tPVR. Design Experimental study. Participants 108 SD rats. Methods Rats were divided randomly into three groups: the Ns control group, the tPVR group, the tPVR treated with GM6001 group. The expression of MMP-2. MMP-9 and TIMP-1. TIMP-2 in retina was analyzed by Western Blot on day 1, 3. 7, 14, 21 and 28. Main Outcome Measures The expression of MMP-2, MMP-9, TIMP-2, TIMP-1 in the SD rats' retina of every group. Results The results of Western Blot showed that the expression of MMP-2 in the SD rats' retina of the tPVR group was stronger than the one in other groups at day 3, 7, 14, 21 and 28: the tPVR treated with GM6001 group was weaker than the one in the tPVR group at day 14, 21 and 28d. The expression of MMP-9 in the tPVR group was stronger than the one in other groups at all time; the cireumstance of tPVR treated with GM6001 group was weaker than the one in the tPVR group at day 1, 3, 7, 14 and 21. The rate of MMP-2/TIMP-2 of the SD rats" retina in the tPVR group increased at day 14, 21 and 28, and it was lower in the tPVR treated with GM6001 group compared with the tPVR group. The rate of MMP-9/TIMP-1 in the tPVR group increased at all time, and it degraded in the tPVR treated with GM6001 group as compared with the tPVR group. Conclusions The dishalance of MMP-2 and TIMP-2, MMP-9 and TIMP-1 involves with the course of tPVR. GM6001 playes an important role in in- terfering the course of tPVR by regulating the balance of these cell faetors.

Objective To investigate the influence of serial subcultivation on the immunoregulation of retinal pigment epithelialium cells in vitro.Methods Co-culture-systems of HRPE cells with lymphocytes were established in vitro.The expression of Fas on different passages of HRPE cells and the induction of apoptosis on lymphocytes were observed by flow cytometry. Results When co-cultured with lymphocytes,the expression of Fas was tapering and the duration of culture in vitro was significantly correlated with the expression of Fas(the rate of positive cell: r=-0.859,P0.05).Conclusion HRPE cells beyond 3 passages showed a 1ow capability of immunoregulation and were not suitable for seeds cells for HRPE transplantation.

Background Age-related cataract is a common cause of blindness.However,its cause and pathogenic mechanism have not been fully understood.Recent studies revealed that aquaporin 1 (AQP1) and AQP0 are closely related to the pathogenesis of cataract.Objective This study was to investigate the differential distribution and expression of AQP0 and AQP1 in lenses with age-related cataract and explore its effect on pathogenesis of age-related cataract.Methods Seventeen anterior capsular membrane samples and nucleus samples of lenses were collected from age-related cataract patients during the small incision nonphacoemulsification cataract extraction,and 6 normal lens samples were obtained from health donors in the First Affiliated Hospital of Fujian Medical University.The expression and distribution of AQP1 and AQP0 in the lenses were detected by immunohistochemistry,and the relative expression levels of AQP1 and AQP0 proteins in the lenses were assayed by using Western blot assay.This study protocol was approved by Ethic Committee of this hospital,and written informed consent was obtained from each patient.Results Immunohistochemistry showed that in the normal lenses,AQP1 expressed mainly in LECs;while AQP0 primarily expressed in fiber cells of the lens cortex and nucleus.The relative expression levels of AQP1 and AQP0 in the lenses with age-related cataract (absorbance) were 0.223±0.008 and 0.118±0.015,which were significantly lower than 0.246±0.007 and 0.149±0.007 in the normal lenses (t =-4.508,-3.291,both at P＜0.01).Western blot revealed that the relative expression levels of AQP1 and AQP0 in the lenses with age-related cataract (absorbance) were 0.663 ± 0.012 and 0.599 ± 0.015,which were significantly reduced in comparison with 0.844±0.041 and 0.955 ±0.064 in the normal lenses (t =-7.492,P＜0.05;t =-9.570,P＜0.01).Conclusions AQP1 and AQP0 distribute in different sites of lenses.The expressions of AQP1 and AQP0 are obviously down-regulated in lenses with age-related cataract,suggesting that AQP1 and AQP0 probably play different roles in the pathogenesis of age-related cataract.

BACKGROUND:Many present studies have reported the early clinical therapeutic effects of short-segment non-fusion fixation for the repair of thoracolumbar burst fracture. The results are satisfactory. However, the mid-and long-term fol ow-up results of this scheme for treating thoracolumbar burst fracture are seldom reported. ＜br> OBJECTIVE:To evaluate the mid-term results of short segment pedicle screw fixation without bone fusion for unstable thoracolumbar burst fracture. ＜br> METHODS:Data of 12 patients with unstable thoracolumbar burst fractures undergoing short segment pedicle screw fixation without bone fusion were retrospectively analyzed. Al patients experienced severe intraspinal occupying and neurological dysfunction, and al of them affected single segment thoracolumbar injuries. The surgical procedure included postural reduction for 2 days and screw fixations at one level above, one level below and at the fractured level itself. The patients underwent removal of implants at 12 months after the initial operation. Imaging and clinical findings, including canal encroachment, percentage of vertebral body height loss, Cobb angle, American Spinal Injury Association motor score, Frankel grade and adjacent segment degenemtion, were evaluated. ＜br> RESULTS AND CONCLUSION:Al patients were fol owed up for at least 5 years. Significant differences in canal encroachment, percentage of vertebral body height loss and Cobb angle were detectable between post-fixation and pre-fixation (P＜0.05). Evaluation results were significantly better after fixation than that before fixation, but no significant difference in evaluation results after fixation was detected (P>0.05). After implantation and removal of fixator, none cases affected aggravated symptoms of neurological impairment. American Spinal Injury Association motor score was 34.2±6.3 before fixation, and 47.7±9.5 during the final fol ow-up, showing significant differences (t=-4.103, P=0.000). During the final fol ow-up, adjacent segments in damage levels did not suffer from degeneration in al patients. Neurological function showed the recovery of Frankel grades 1 or 2. These data indicated that a good mid-term result of short segment pedicle screw fixation without bone fusion for unstable thoracolumbar burst fracture with neurological deficit can be achieved. The improved saggital alignment was effectively constructed and maintained. Adjacent segment degeneration was not found at the injury level.

Objective To establish a rat model of blood ocular barrier breakdown induced by anterior segment intraocular analogic surgery. Methods One hundred and fifty healthy adult male rats were randomly divided into control group and model group,75 rats in each group.The rats were anesthetized with 1 ml/kg ketamine hydrochloride/xylazine hydrochloride solution.Three way pipes were attached to a phosphate buffer infusion bag and two intravenous catheters. One catheter was inserted 30° obliquelythrough the transparent cornea anterior to the limbus into the rat's anterior chamber.Then the needle was withdrawn and the sheath was indwelling.Another catheter was connected with a manometer.Intraocular pressure was varied from 0 to 12 mm Hg (1 mm Hg=0.133 kPa) 60 times,30 times per min.The catheter was removed.The eyes were treated with ofloxacin ophthalmic solution after surgery.The 1st,2nd,3rd,5th and 7th day after surgery,the integrity of the blood ocular barrier was assessed by immunohistochemical staining for albumin and quantitative measurement using Evan's blue as a tracer. Results Albumin immunohistochemical staining of the control group was confined to the iris and retinal blood vessels.The choroid was stained at each time point after surgery.Albumin immunohistochemical staining of the model group was abundant around the iris and the retinal vasculature on the 1st day after surgery.The albumin diffused throughout the iris and the retina on the 2nd and the 3rd day after surgery.The albumin reached the retinal vessels on the 5th and 7th day after surgery.The aqueous humor Evans blue leakages of the model group were higher than those of the control group on the 1st,2nd,3rd and 5th day after surgery.The differences were statistically significant (t=25.781,37.433,25.150,19.171; P＜0.01).The Evans blue leakage of the model group was close to that of the control group on the 7th day after surgery. The difference was no statistical significant(t=1.303,P=0.209).The retinal Evans blue leakages of the model group were higher than those of the control group on the 1st,the 2nd and the 3rd day after surgery.The differences were statistically significant (t=11.997,14.622,23.014; P＜0.01).The Evans blue leakage of the model group was close to those of the control group on the 5th and 7th day after surgery. The differences were not statistically significant(t=2.027,0.756 ； P=0.058,0.459).Conclusion This study establishes a rat model of blood ocular barrier breakdown induced by imitating the injury to the anterior segment during intraocular surgery.

Background The imbalance of cell cycle regulation results in proliferative vitreoretinopathy (PVR).Studing the effects of cyclin dependent kinase (CDK) and CDK inhibitor (CKI) on the cell cycle regulation of retinal pigment epithelial (RPE) cells and fibroblasts in PVR formation is of important significance.Objective This study was to investigate the expressing trend of p21 ,p27 and CDK inhibitors in retinas of different ages of rabbits and explore the relationship between p21 or p27 and cell growth.Methods Nine clean New Zealand rabbits were assigned to 10-week group,20-week group and 30-week group according to the age and 3 rabbits for each.The eyeballs were enucleated binocularly after the animals were sacrificed and retinas were isolated.Real-time PCR and Western blot were employed to detect the expressions of p21 and p27 mRNA and their proteins in retinas of the rabbits.The use and care of the animals followed the Regulations for the Administration of Affair Concerning Experimental Animals by State Science and Technology Committee.Results The relative expressing levels of p21 mRNA were 1.631±0.063,1.506±0.012 and 1.585 ±0.015, and those of p27 m RNA were 1.581 ± 0.048,1.470 ± 0.012 and 1.490 ±0.013 in the 10-week group,20-week group and 30-week group, respectively, showing significant differences among the groups (p21 mRNA: F=9.311,P=0.014;p27 mRNA: F=12.360, P=0.007) , and the p21 and p27 mRNA expressing levels were significantly higher in the 10-week group and 30-week group than those in the 20-week group (all at P＜ 0.05).The expressing levels of p21 protein were 0.675 ± 0.061,0.089 ±0.001 and 0.200 ± 0.007, and those of p27 protein were 0.928±0.019,0.183±0.005 and 0.576±0.089 in the 10-week group,20-week group and 30-week group, respectively, with remarkable differences among the groups (p21 : F =228.905, P＜0.001;p27 : F =148.957,P＜0.001), and the expressions were significantly raised in the 10-week group and 30-week group in comparison with the 20-week group (all at P＜0.01).Significantly positive correlations were found in the expressing levels of p21 and p27 both in transcriptional and protein levels (mRNA : r =0.906, P＜0.01;protein : r =0.913, P＜0.01).Conclusions The expressions of p21 and p27 up-regulate in the retinas of developing stage of rabbits but gradually reduce with adultness.However, p21 and p27 levels appear to be increasingly raised with aging of the rabbits.It is implied that p21 and p27 play a balancing role in the process of cycle regulation in retina cells.

Objective To investigate the retinal pigment epithelium cells(RPE) and makeit the base of clinical application for transplantation.Methods The cultured RPE cells labeled by BrdU was injected into the host's subretinal space by external transcleral.The structure and ultrastructure of the transplanted RPE cells were observed by microscope and transmission electron microscope.Results The transplanted cells had the normal structure as the host's cells.They attached to Bruch's membrane with basal infoldings and forming microvill on the surface of the cells.Conclusion The external transcleral is a practical method for RPE transplatation.The transplanted cells can vitalize and form some normal ultrastrcture.

Objective To investigate the expression of MMP-2 and TIMP-2 during the course of traumatic PVR treated with GM6001 and without GM6001,and to explore the potential role of MMP-2 and TIMP-2 during the course of traumatic PVR and to evaluate the effect of GM6001 on traumatic PVR prevention and treatment.Methods 360 SD rats were divided randomly into three groups: normal control group,the traumatic PVR group,the traumatic PVR treated with GM6001 group.The normal control group was intravitreous injected with normal saline.The traumatic PVR group was intravitreous injected with the PRP.The traumatic PVR treated with GM6001 group was intravitreous injected with the PRP and GM6001.The expression of MMP-2 and TIMP-2 were qualitativly and semiquantitativly analyzed with immunohistochemistry on day 1,3,7,14,21 and 28.Results 1.The results of immunohistochemistry showed that the expression of MMP-2,TIMP-2 was mainly located in the photoreceptor cells layer,out plexiform layer,inner plexiform layer and nerve fiber layer.2.The expression of MMP-2 in the normal group and the traumatic PVR treated with GM6001 group was weak at all time.The differences were statistical significance as compared with the normal group and the traumatic PVR treated with GM6001 group(P

Objective To study the short and long-term effects of vocational rehabilitation on the disabled with low job satisfaction.Methods 66 disabled workers were divided into control group (n=32) and treatment group (n=34). The treatment group accepted physical,occupational and psychosocial therapy for 4 weeks. All the workers were assessed with Minnesota satisfaction questionnaire before treatment,3 and 12 months later. Results The total, internal and external satisfaction significantly improved in treatment group after treatment (P<0.01), except the internal satisfaction 1 year later (P>0.05). Conclusion Specific vocational rehabilitation programme may promote the inclusion of disabled workers into the workplace.

Objective: To discuss the curative effect of slow stretching training combined with extracorporeal shock wave in the treatment of spasticity of biceps brachii in the stroke patients, and to provide the clinical evdiences for the application of this therapy. Methods: Fifty-six patients with post-stroke biceps bachii spasticity were randomly divided into observation group (n =28) and control group (n=28) according to random number table method. The patients in two groups received routine treatment (40 min/time, 2 times · d-1, 6 d per week) and slow stretching training (15 min/time, 2 times · d-1, 6 d per week). On the basis of the routine treatment, the patients in observation group were treated with extracorporeal shock wave, while the patients in control group were treated with pseudo-extracorporeal wave therapy. Modified Ashworth scale (MAS), simplified upper limb Fugl-Meyer score (FMA) and modified Barthel index (MBI) were used to evaluate the curative effects before treatment, 2 weeks and 4 weeks after treatment. Results: After 2 weeks of treatment, the FMA score of the patients in observation group was siginificantly increased compared with before treatment (P<0.05), and the MBI and MAS scores were decreased (P<0.05); the MAS score of the patients in observation group was significantly lower than that in control group (P=0.036), while there were no significant differences in the FMA and MBI scores between two groups (P>0.05). Compared with 2 weeks after treatment, the MAS score of the patients in observation group 4 weeks after treatment was significantly decreased (P<0.05), and the FMA and MBI scores were increased (P< 0.05); the FMA score and the MBI score in observation group were significantly higher than those in control group (P<0.05 or P<0.01), and the MAS score was significantly lower than that in control group (P<0.01). Conclusion: Slow stretching training combined with extracorporeal shock wave could effectively improve the post-stroke biceps brachii spasticity, and its therapeutic effect is better than the simple application of slow stretching training.