Objective To observe the classification,clinical and pathological features of ciliary body tumors. Methods The clinical and pathological data of 11 cases of primary ciliary body tumors were analysed retrospectively. Results By pathological examination,the tumors of these cases were devided into malignant melanoma (2 cases), benign melanocytoma (3 cases),leiomyoma (2 cases), and angio-leiomyoma, neurilemoma, non-special granuloma and medulloepithelioma (1 case respectively). Both of the benign and malignant tumors of ciliary body tended to grow and enlarge progressively. The cardinal clinical manifestations of this series of 11 cases were as follows: elevation of intraocular pressure in 7, local scleral vascular dilatation in 5, secondary exudative retinal detachment in 5,and the signs of anterior uveitis in the early stage of tumor growth in 4. Conclusion The histopathological types of cilliary tumors are manifold,and the tumors are prone to enlarge progressively in developement either in benign or malignant ones, so that the rates of clinical misdiagnosis are relatively high. (Chin J Ocul Fundus Dis, 2002, 18: 273-275)
Objective To examine the role of recombinant interleukin-10 (IL-10) and the therapeutic effect of endotoxin-induced uveitis (EIU) in rats.Methods Fifty-six male Wistar rats were randomized into three groups. IL-10 treatment group and positive control group had 24 rats respectively, and the normal control group had eight rats. Endotoxin-induced uveitis (EIU) is an established animal model of acute ocular inflammation induced by LPS intravenous injection (1 mu;g/kg). The onset times and signs were observed and the clinical scores were recorded. The blood samples and the aqueous humor samples of right eye were collected separately before the rats were sacrificed at fourth hour, 24th hour and third day after LPS injection. The enzyme-linked immunosorbent assay was used to measure tumor necrosis factor (TNF) alpha;,IL-6, and IL-10 levels in the serum and aqueous humor. The left eyes were used for pathological examination and pathological grading. Results The symptoms of uveitis were appeared in all 24 rats in the positive group. The average onset time was (3.81plusmn;1.05) hours, the average clinical score was 3.67plusmn;1.97. The mild manifestations of uveitis were also appeared in all of the rats in treatment group. The average onset time was (5.63plusmn;1.02) hours, the average clinical score was 2.00plusmn;1.25. The average onset time in treatment group was postponed compared with the rats of positive group (t=4.95, P=0.000). The clinical scores (t=3.50, P=0.00) and the pathological grades (t=3.28, P=0.00) in treatment group were lower than those of positive group. There were not signs or pathologic changes in all the eight rats in the negative control group. The serum and aqueous humor levels of TNF-alpha; and IL-6 in the rats of positive group were higher than those of the treatment group and control group (F=15.34, 57.65, 67.59, 8.42; P=0.00). The serum and aqueous humor levels of IL-10 in the rats of treatment group were higher than those of the positive group and the control group (F=17.84,7.76; P=0.00). There were positive correlations between the level of aqueous humor TNF-alpha;, serum and aqueous humor levels of IL-6 and the disease severity (reye＝0.58, 0.31,0.81, rpath＝0.56, 0.31, 0.74; P＜0.05). The negative correlations were presented between the serum levels of IL-10 with the disease severity (r=-0.54,-0.55; P=0.00). There were negative correlations between the serum and aqueous humor levels of TNF-alpha; and IL-6 and the onset time of the disease (r＝-0.47,-0.59,-0.77,-0.36; P＜0.05) as well. Conclusions These findings bly suggest that suppressive IL-10 is a potent candidate for the prevention of TNF-alpha; and IL-6 in uveitis and could be applied as a novel immunoregulatory agent to control EIU.
Objective To analyze the clinical features of retinal detachment in macular spontaneous hemorrhage to improve the level of diagnosis and treatment of this disease. Methods The serial clinical data of 23 patients (23 eyes) with subretinal hemorrhage in macular region with the area over 4DDtimes;5DD who were diagnosed in our hospital from Sep, 1998 to Mar, 2003 were analyzed retrospectively. The patients included 12 males (12 eyes) and 11 females (11 eyes) with the average age of 64.1 (47-75). Fundus fluorescein angiography (FFA), indocyanine green angiography (ICGA) and B-scan examination were performed on the patients to analyze the pathogenic factors, and the visual acuity and manifestation of ocular fundus were observed during the 8-24 months followed-up period. Results The visual acuity decreased to less than 0.2 or light perception suddenly in all affected eyes. In 23 eyes, choroidal neovascularization (CNV) of age-related macular degeneration (AMD) was found in 7, polypoidal choroidal vasculopathy (PCV) was in 5, retinal macroaneurysm was in 2, and unknow pathogenic factor in 9. Among the 23 eyes, hemorrhage was absorbed and no cicatritial formation at the fovea in 3 eyes with the visual acuity of 0.4-0.8; scar and pigment proliferation in the hemorrhage area were seen in 12 eyes with the visual acuity of finger counting (FC) to 0.2; combined vitreous hemorrhage was found in 8 eyes, including massive scar in the macular area in 3 who had undergone vitrectomy with the visual acuity of FC/66cm to 0.2 and blindness in the other 5 eyes. Conclusion Spontaneous hemorrhagic retinal detachment always arises in old people whose symptoms were sudden decrease or loss of the visual acuity. The configuration of the hemorrhage is local and diffuse. The prognosis of the visual acuity of most of the patients is poor due to the serious tissue injury in macula area. (Chin J Ocul Fundus Dis, 2006, 22: 228-231)
Objective To explore the clinicopathological features and misdiagnosed causes of choroidal hemangioma. Methods Seven misdiagnosed cases(7eyes) of choroidal hemangioma,which were enucleated,were analysed retrospectively. Results One of the 7 cases was misdiagnosed as absolute phase of the secondary glaucoma,and 6 of them as choroidal melanoma before the enucleation.The majority of cases in this series manifested themselves clinically and pathologically in progressive loss of visual acuity and a flat elevated tumor located at the posterior ocular fundus near the optic disc and associated with exudative retinal detachment.And also there were occasionally small focal or linear pigmentary deposites obser ved on the surface of the neoplasm. Conclusion A flat elevated discoid tumor in the posterior fundus with extensive exudative retinal detachment might be a clinicopathological feature of the choroidal hema ngioma. (Chin J Ocul Fundus Dis,1999,15:91-93)
ObjectiveTo observe the effects of human umbilical cord mesenchymal stem cells (hUCMSCs) on blood glucose levels and diabetic retinopathy in diabetes mellitus (DM) rats. MethodA total of 45 healthy male Sprague-Dawley rats were randomly divided into normal control group (group A, 10 rats) and DM group (33 rats). Diabetic model was established in DM group by tail vein injection of streptozotocin.The DM group was further randomly divided into 3 groups (11 rats in each group), including group B (no transplantation), group C (hUCMSC was injected through tail vein) and group D (hUCMSC was injected into the vitreous). Blood glucose, retina wholemont staining and expression of brain derived neurotrophic factor (BDNF) in the retina were measured at 2, 4, 6, 8 weeks after hUCMSC injection. The blood glucose was significantly different between A-D groups before injection (t=-64.400, -60.601, -44.065, -43.872; P=0.000) BDNF expression was studied by real time fluorescence quantitative polymerase chain reaction (RT-PCR) and immunohistochemistry staining. ResultsThe blood glucose was significantly different between A-D groups after hUCMSC injection (F=400.017, 404.410, 422.043, 344.109; P=0.000), and between group C and group B/D (t=4.447, 4.990; P < 0.01). Immuno-staining shown that BDNF was positive in ganglion cell layer (RGC) of group A, weak in group B while BDNF expression increased in group C/D. BDNF mRNA expression was significantly different between group B, C and D at 4, 6 and 8 weeks after hUCMSC injection (F=29.372, 188.492, 421.537; P=0.000), and between group B and C/D (t=66.781, 72.401, 63.880, 88.423, 75.120, 83.002; P < 0.01) by RT-PCR analysis. The BDNF mRNA expression was significantly different between C and D groups only at 8 weeks after hUCMSC injection (t=127.321, P=0.005). ConclusionsTail vein injection of hUCMSCs can significantly reduce the blood glucose levels of rats. Intravenous and intravitreal injection of hUCMSCs can increase the expression of BDNF.
Objective To observe the inhibition effect of the hypoxia inducible factor-1alpha; (HIF-1alpha;) specific siRNA on the expression of vascular endothelial growth factor (VEGF) mRNA in retinal tissues in diabetic rat. Methods This is a randomized controlled study. HIF-1alpha; specific siRNA recombinant plasmid was built in pSilencer2.1-U6neo vector. Fifty-four healthy Sprague Dawley (SD) rats were divided into control group (15 rats) and experimental group (39 rats). The experimental rats were induced with streptozotocin injection for diabetic retinopathy model, and then randomly divided into diabetic retinopathy (DR) group (15 rats), vector group (12 rats) and gene therapy group (12 rats). LipofectamineTM2000 mixed with pSilencer2.1-U6neo plasmid or HiF-1alpha; siRNA plasmid were injected into the vitreous in the vector group and gene therapy group respectively. Nothing was transfected into DR and control group. The expression of VEGF mRNA in retinas was measured by real-time RT-PCR. The inhibition efficiency of VEGFmRNA was calculated at 24, 48, 72 hours and 1 week after injection respectively. Significant differences between groups were evaluated by oneway analysis and LSD-t analysis. Results HIF-1alpha; siRNA recombinant plasmid was confirmed by enzyme digestion and sequence analysis. Real-time RT-PCR revealed that the expression of VEGFmRNA was faint in the control group, increased obviously in the DR and vector group, decreased in the gene therapy group. There was no statistically significant between DR and vector group (t=0.669，0.142,0.151，0.025；P=0.514，0.889，0.882，0.980). The expression of VEGFmRNA in the gene therapy group were obviously decreased compared with DR and vector group (t=8.768, 13.695, 11.285, 8.253;P=0.000). The inhibition efficiency of VEGFmRNA was 32.76%, 43.60%, 47.70%, 50.86% at 24, 48, 72 hours and 1 week after injection. Conclusions The expression of VEGFmRNA can be efficiently inhibited by HIF-1alpha; siRNA recombinant plasmid.
ObjectiveTo observe the effects on the function and structure of retina in diabetic rats by intravitreal transplantation of retinal nerve stem cells (NSC) differentiated from human umbilical cord mesenchymal stem cells (hUCMSCs). MethodsFifty clean male Sprague-Dawley rats were randomly divided into normal control with 9 rats (group A) and diabetes mellitus (DM) group with 31 rats. The DM models were induced by intraperitoneal injection of streptozocin. The rats of DM group were randomly divided into four groups after 10 weeks: rats with DM only (group B), diabetic rats with saline intravitreal injection (group C), diabetic rats with NSC intravitreal injection (group D), and 9 rats for each. The rats in the group A and B received no treatment. The retinal function was examined by the flash-electroretinogram on 2, 4, 6 weeks after intervention, the latency and amplitude of a-wave, b-wave of Rod, a-wave, b-wave of Max reactions (Max-R) and the total amplitudes of OPs were recorded. The morphological changes of retina were observed by hematoxylin-eosin staining. ResultsOn 2 and 4 weeks after the intervention, the differences of latency and amplitude of b-wave of Rod, a-wave, b-wave of Max-R and the total amplitudes of OPs among group A-D were significant (P<0.05). Compared group D with group B, C, the amplitude of b-wave of Rod, Max-R and the total amplitudes of OPs were increased (P<0.05); latency of b-wave of Max-R was decreased (P<0.05). On 6 weeks after the intervention, the amplitude of b-wave of Rod and the amplitude of a-wave, b-wave of Max-R and the total amplitudes of OPs in group D were increased compared with group B and C (P<0.05), the latency of b-wave of Rod and Max-R in group D were decreased compared with group C (P<0.05). On 10 weeks after molding, each retinal layers were disordered in diabetes mellitus group. On 2 weeks after the intervention, the number of cells in the retinal layers in group B and C were reduced compared with group A, and the structure was more disorder. On 4 weeks after the intervention, the structure of each retina layer in group D arranged less disordered, and the number of retinal ganglion cells was more than group B and C. It was also found that the retinal vascular endothelial expanded and retinal blood vessels cells proliferated. ConclusionThe function of retina in diabetes mellitus rats is improved by intravitreal injection of retinal NSCs differentiated from hUCMSCs.