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Differential visual system organization and susceptibility to experimental models of optic neuropathies in three commonly used mouse strains

机译:三种常用小鼠品系中的视觉系统差异性及其对视神经病变实验模型的敏感性

摘要

Mouse disease models have proven indispensable in glaucoma research, yet the complexity of the vast number of models and mouse strains has also led to confusing findings. In this study, we evaluated baseline intraocular pressure, retinal histology, and retinofugal projections in three mouse strains commonly used in glaucoma research, i.e. C57Bl/6, C57Bl/6-Tyr(c), and CD-1 mice. We found that the mouse strains under study do not only display moderate variations in their intraocular pressure, retinal architecture, and retinal ganglion cell density, also the retinofugal projections to the dorsal lateral geniculate nucleus and the superior colliculus revealed striking differences, potentially underlying diverging optokinetic tracking responses and visual acuity. Next, we reviewed the success rate of three models of (glaucomatous) optic neuropathies (intravitreal N-methyl-d-aspartic acid injection, optic nerve crush, and laser photocoagulation-induced ocular hypertension), looking for differences in disease susceptibility between these mouse strains. Different genetic backgrounds and albinism led to differential susceptibility to experimentally induced retinal ganglion cell death among these three mouse strains. Overall, CD-1 mice appeared to have the highest sensitivity to retinal ganglion cell damage, while the C57Bl/6 background was more resistant in the three models used.
机译:事实证明,小鼠疾病模型在青光眼研究中是必不可少的,但是大量模型和小鼠品系的复杂性也导致令人困惑的发现。在这项研究中,我们评估了青光眼研究中常用的三种小鼠品系(即C57Bl / 6,C57Bl / 6-Tyr(c)和CD-1小鼠)的基线眼压,视网膜组织学和视网膜视网膜真菌预测。我们发现正在研究的小鼠品系不仅在眼内压,视网膜结构和视网膜神经节细胞密度方面表现出适度的变化,而且在视网膜外侧的背侧膝状核和上丘的视网膜视网膜上的投影也显示出惊人的差异,可能是潜在的发散性视动学跟踪反应和视敏度。接下来,我们回顾了三种(青光眼)视神经病变模型的成功率(玻璃体内N-甲基-d-天冬氨酸注射,视神经挤压和激光光凝诱发的高眼压),寻找这些小鼠之间疾病易感性的差异株。在这三种小鼠品系中,不同的遗传背景和白化病导致对实验性诱导的视网膜神经节细胞死亡的敏感性不同。总体而言,CD-1小鼠对视网膜​​神经节细胞损伤的敏感性最高,而在所使用的三种模型中,C57Bl / 6背景的耐药性更高。

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