目的:探讨一种最新的眼表综合分析仪Keratograph对于泪膜稳定性评估的重复性和准确性,将其测量值与传统的检查方法进行比较。方法:采用Keratograph测量包括首次泪膜破裂时间(the first tear film break-up time,BUT-f)和平均泪膜破裂时...目的:探讨一种最新的眼表综合分析仪Keratograph对于泪膜稳定性评估的重复性和准确性,将其测量值与传统的检查方法进行比较。方法:采用Keratograph测量包括首次泪膜破裂时间(the first tear film break-up time,BUT-f)和平均泪膜破裂时间(the average tear film break-up time,BUT-ave)在内的非侵入式泪膜破裂时间(noninvasive tear film break-up time,NI_BUT)结果。测量结果的重复性使用变异系数(coefficient of variation,CV)和组内相关系数(intraclass correlation coefficient,ICC)进行评价,NI-BUT与传统的荧光素泪膜破裂时间(fluorescein tear film break-up time,FBUT)的比较采用Wilcoxon符号秩和检验,确定NI-BUT与FBUT,SchirmerⅠ试验结果的相关关系,采用BlandAltman分析进行一致性评价。结果:本研究纳入了48个受检者(48眼),平均年龄38.7±15.2岁。BUT-f的CV和ICC分别为12.6%和0.95,BUT-ave的为9.8%和0.96。BUT-f值低于FBUT值,差异有统计学意义(6.16±2.46s vs 7.46±1.92s,P<0.01)。NI-BUT与FBUT,SchirmerⅠ试验结果之间存在显著的正相关关系(P<0.01)。BUT-f与FBUT的95%一致性界限(limits of agreement,Lo A)范围为4.46s,BUT-ave与FBUT的Lo A范围为3.64s。结论:Keratograph能够提供具有较好重复性和可靠性的NI-BUT数据,在干眼诊治和角膜屈光性手术等领域有很好的应用前景。展开更多
OBJECTIVE: To investigate in vivo survival of retinal ganglion cells (RGCs) after partial blockage of optic nerve (ON) axoplasmic flow by sub-retinal space or vitreous cavity injection of brain-derived neural factor (...OBJECTIVE: To investigate in vivo survival of retinal ganglion cells (RGCs) after partial blockage of optic nerve (ON) axoplasmic flow by sub-retinal space or vitreous cavity injection of brain-derived neural factor (BDNF) produced by genetically modified neural progenitor cells (NPCs). METHODS: Adult Sprague-Dawley (SD) rat RGCs were labeled with granular blue (GB) applied to their main targets in the brain. Seven days later, the left ON was intra-obitally crushed with a 40 g power forceps to partially block ON axoplasmic flow. Animals were randomized to three groups. The left eye of each rat received a sham injection, NPCs injection or an injection of genetically modified neural progenitors producing BDNF (BDNF-NPCs). Seven, 15 and 30 days after ON crush, retinas were examined under a fluorescence microscope. By calculating and comparing the average RGCs densities and RGC apoptosis density, RGC survival was estimated and the neuro-protective effect of transplanted cells was evaluated. RESULTS: Seven, 15 and 30 days after crush, in the intra-vitreous injection group, mean RGC densities had decreased to 1885 +/- 68, 1562 +/- 20, 1380 +/- 7 and 1837 +/- 46, 1561 +/- 58, 1370 +/- 16, respectively with sham injection or neural progenitors injection. However, RGCs density in the groups treated with intra-vitreous injection of BDNF-NPC was 2101 +/- 15, 1809 +/- 19 and 1625 +/- 34. Similar results were found in groups after sub-retinal injection. Higher densities were observed in groups treated with BDNF-NPCs. There were statistically significant differences among groups through nonparametric tests followed by the Mann-Whitely test. RGC apoptosis density in BDNF-NPC at each follow-up time was less than in other groups. CONCLUSIONS: A continuous supply of neurotrophic factors by the injection of genetically modified neural progenitors presents a highly effective approach to counteract optic neuropathy and RGC degeneration after partial ON axoplasmic flow blockage.展开更多
文摘目的:探讨一种最新的眼表综合分析仪Keratograph对于泪膜稳定性评估的重复性和准确性,将其测量值与传统的检查方法进行比较。方法:采用Keratograph测量包括首次泪膜破裂时间(the first tear film break-up time,BUT-f)和平均泪膜破裂时间(the average tear film break-up time,BUT-ave)在内的非侵入式泪膜破裂时间(noninvasive tear film break-up time,NI_BUT)结果。测量结果的重复性使用变异系数(coefficient of variation,CV)和组内相关系数(intraclass correlation coefficient,ICC)进行评价,NI-BUT与传统的荧光素泪膜破裂时间(fluorescein tear film break-up time,FBUT)的比较采用Wilcoxon符号秩和检验,确定NI-BUT与FBUT,SchirmerⅠ试验结果的相关关系,采用BlandAltman分析进行一致性评价。结果:本研究纳入了48个受检者(48眼),平均年龄38.7±15.2岁。BUT-f的CV和ICC分别为12.6%和0.95,BUT-ave的为9.8%和0.96。BUT-f值低于FBUT值,差异有统计学意义(6.16±2.46s vs 7.46±1.92s,P<0.01)。NI-BUT与FBUT,SchirmerⅠ试验结果之间存在显著的正相关关系(P<0.01)。BUT-f与FBUT的95%一致性界限(limits of agreement,Lo A)范围为4.46s,BUT-ave与FBUT的Lo A范围为3.64s。结论:Keratograph能够提供具有较好重复性和可靠性的NI-BUT数据,在干眼诊治和角膜屈光性手术等领域有很好的应用前景。
基金ThisstudywassupportedbygrantsfromtheNationalNaturalSciencFoundationofChina (No 3 9670 775or39770811)andGuangdongKeyProgram (1998)
文摘OBJECTIVE: To investigate in vivo survival of retinal ganglion cells (RGCs) after partial blockage of optic nerve (ON) axoplasmic flow by sub-retinal space or vitreous cavity injection of brain-derived neural factor (BDNF) produced by genetically modified neural progenitor cells (NPCs). METHODS: Adult Sprague-Dawley (SD) rat RGCs were labeled with granular blue (GB) applied to their main targets in the brain. Seven days later, the left ON was intra-obitally crushed with a 40 g power forceps to partially block ON axoplasmic flow. Animals were randomized to three groups. The left eye of each rat received a sham injection, NPCs injection or an injection of genetically modified neural progenitors producing BDNF (BDNF-NPCs). Seven, 15 and 30 days after ON crush, retinas were examined under a fluorescence microscope. By calculating and comparing the average RGCs densities and RGC apoptosis density, RGC survival was estimated and the neuro-protective effect of transplanted cells was evaluated. RESULTS: Seven, 15 and 30 days after crush, in the intra-vitreous injection group, mean RGC densities had decreased to 1885 +/- 68, 1562 +/- 20, 1380 +/- 7 and 1837 +/- 46, 1561 +/- 58, 1370 +/- 16, respectively with sham injection or neural progenitors injection. However, RGCs density in the groups treated with intra-vitreous injection of BDNF-NPC was 2101 +/- 15, 1809 +/- 19 and 1625 +/- 34. Similar results were found in groups after sub-retinal injection. Higher densities were observed in groups treated with BDNF-NPCs. There were statistically significant differences among groups through nonparametric tests followed by the Mann-Whitely test. RGC apoptosis density in BDNF-NPC at each follow-up time was less than in other groups. CONCLUSIONS: A continuous supply of neurotrophic factors by the injection of genetically modified neural progenitors presents a highly effective approach to counteract optic neuropathy and RGC degeneration after partial ON axoplasmic flow blockage.
