排序方式: 共有47条查询结果,搜索用时 14 毫秒
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虹膜色素上皮(IPE)细胞是一种胚胎发育与视网膜色素上皮(RPE)细胞同源的生长细胞,不仅在结构上与RPE细胞有着惊人的相似之处,而且在吞噬视杆细胞外节段和分泌细胞因子等功能方面也有显著一致性.利用基因转染等方法 将IPE细胞移植到视网膜下腔不仅可以应用于遗传性视网膜变性,老年性相关变性等眼科疾病的治疗,同时还可以应用于神经退行性疾病的治疗.关注IPE细胞的功能特性及其移植方法 的研究现状和应用前景具有重要的临床意义.现就IPE细胞的功能特性及研究进展作一综述. 相似文献
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目的:探讨分离、消化SD大鼠视网膜微动脉平滑肌细胞(RMASMCs)的方法。方法:取正常SD大鼠眼球,分离视网膜微动脉,利用不同消化酶消化不同时间后,分离RMASMCs,在倒置显微镜下观察RMASMCs形态,并行免疫组化法鉴定。结果:解剖显微镜下成功急性分离视网膜动脉分支,即视网膜微动脉(直径40.23±5.61μm)。1、2、3号消化酶各消化10-16min,RMASMCs数量逐步增多,16min时最多(13.4±1.3个/低倍视野),与其它消化时间相比,差异有统计学意义(P0.05)。倒置显微镜下观察收获的RMASMCs呈长梭形、细胞膜完整、边缘光滑;免疫组化染色鉴定其胞浆呈α-action阳性表达。结论:采用急性分离、逐步消化的方法能成功获取较多数量和较高质量的RMASMCs。 相似文献
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目的 探讨糖尿病视网膜病变SD大鼠视网膜动脉平滑肌细胞中钙离子浓度的变化。方法 取40只正常雄性SD大鼠,采用链脲佐菌素(streptozotocin,STZ)100 mg·kg-1腹腔内注射建立糖尿病大鼠模型,持续6个月后经眼底荧光血管造影证实各大鼠出现糖尿病视网膜病变,作为糖尿病视网膜病变组。同时选择正常SD大鼠40只及单纯形成糖尿病的大鼠40只分别用作正常对照组及单纯糖尿病组。酶消化法分离出视网膜动脉平滑肌细胞,荧光测定仪测定三组大鼠视网膜动脉平滑肌细胞内钙离子浓度,SPSS17.0软件进行分析,以P<0.05为差异有统计学意义。结果 造模8周后,测得正常对照组和单纯糖尿病组大鼠血糖水平分别为(6.77±0.18)mmol·L-1和(31.14±0.75)mmol·L-1,符合成模条件,6个月后糖尿病视网膜病变组大鼠眼底荧光血管造影确定为糖尿病视网膜病变SD大鼠模型。糖尿病视网膜病变大鼠视网膜动脉平滑肌细胞内钙离子浓度(255±10)nmol·L-1较正常对照组(123±11)nmol·L-1和单纯糖尿病组(152±23)nmol·L-1明显增高,三组之间差异具有统计学意义(P<0.05)。结论 糖尿病视网膜病变视网膜动脉平滑肌细胞内钙离子浓度升高可能成为糖尿病视网膜动脉异常收缩及功能异常的重要原因。 相似文献
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目的 观察肿瘤转移抑制基因KAI1/CD82在自然流产绒毛和蜕膜组织中的表达情况,并建立蜕膜基质细胞(decidual stromal cell,DSC)与滋养细胞共培养模型,探讨KAI1/CD82在人母—胎界面的生物学作用.方法 分别采用RT-PCR和Real-time PCR、免疫组化和Western blot技... 相似文献
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Objective To observe the abnormal expression of transthyretin in serum and vitreous of high myopia patients.Methods 116 patients(50 males and 66 females)with high myopia,diagnosed by retinoscopic reflex,slit-lamp microscope,indirect ophthalmoscope and Iol-Master,were enrolled.The patients had an average age of(49.7±12.3)years and average diopter of(-10±4.2)D.The control group had 86 healthy individuals(42 males and 44 females)with an average age of(48.5±10.5)years.According to the findings of indirect ophthalmoscope and optical coherence tomography(OCT)examination,the patients were classified as foveal detachment,macular hole,choroidal neovascularization,epimacular membrane.retinal scar and no significant pathological changes.2 ml peripheral blood samples were taken from all the subjects.The vitreous samples of high myopia patients with foveal detachment and macular hole (20 patients.20 eyes)were collected before pars plana vitrectomy.LTQ-MASS was performed on 16 serum samples of patients and 16 control serum samples.Western blot and enzyme linked immunosorbent assay (ELISA)were used to detect serum transthyretin expression in high myopia groups(n=100)and control group(n=80).Vitreous samples(n=20)and corresponding serum samples were further analyzed by ELlSA.Meanwhile,the relationship between visual acuity after surgery and transthyretin expression level in vitreous were analyzed.Results LTQ-MASS detected 4 proteins differentially expressed in the serum of patients and control group,transthyretin was the most significantly increased protein in high myopia patients.Western blot validated that serum transthyretin of high myopia group was much higher than that of the control group(t=3.68,P<0.05).High myopia patients with macular hole and macular detachment had much higher serum and vitreous transthyretin than that of control group(F=9.28,P<0.01).Patients with higher vitreous transthyretin had better postoperative visual acuity.Conclusions The transthyretin level increases significantly in serum and vitreous of high myopia patients,and it correlated with ocular pathologies and visual outcomes. 相似文献
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玻璃体切除联合硅油注入术后继发青光眼的病例临床上较为常见,但术后发生前房消失却极为少见。由于伴发顽固性高眼压而导致视功能损害,临床治疗困难。我院近期收治了一例,现报告如下: 相似文献