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在形占主导地位的十三线地松鼠中,标志着棒道的特征

Riley Ferguson¹, Kiyoharu J Miyagishima¹, Francisco M Nadal-Nicolas¹

¹Retinal Neurophysiology Section, National Eye Institute, National Institutes of Health, Bethesda, MD, USA.

Frontiers in ophthalmology

|July 8, 2024

概括

十三线地松鼠 (TLGS) 的AII-亚马克林细胞 (AIIs) 分布稀疏,这表明它们在夜视方面起着主要作用,而不是细节信号传递. 它们的功能似乎保持不变,与老鼠AI不同.

科学领域:

神经科学是一个神经科学.
眼科医生眼科眼科
视网膜生物学视网膜生物学

背景情况:

在哺乳动物视网膜中,AII-亚马克林细胞 (AIIs) 对于视野 (夜间) 视觉至关重要.
与杆主导物种相比,它们在主导物种中的作用,如十三线地松鼠 (TLGS),理解程度较低.

研究的目的:

研究AIIs的形态和功能以及在形主导的TLGS视网膜中的棒通路.
为了比较TLGS中的AIIs的结构和功能与杆主导物种中的AIIs的结构和功能.

主要方法:

免疫组织化学用于识别AIIs (calretinin阳性) 和它们的连接 (Connexin36用于间隙连接).
电生理学方法,包括单个光感应器记录和全场电网红图 (ERG).

主要成果:

与杆主导物种相比,TLGS AIIs具有卡列丁因阳性,连接到杆双极细胞,并显示密度下降和扩大树木化.
在TLGS中的Scotopic ERG反应由杆和介导,表明保留的杆路径组件.
在TLGS中的AIIs通过间隙连接 (Connexin36) 连接,但它们的稀疏分布表明它们在精细空间信号传输中的作用有限.

结论:

在TLGS中保留了杆状通路,AIIs主要在夜视中起作用,这与它们的"杆状"亚马克林细胞作用相一致.
AIIs在小鼠信号传递中的扩大作用可能是由于小鼠的杆主导视网膜而导致的适应.

关键词:

所有的亚马克林.在Connexin36上使用Connexin36.双极细胞是双极细胞.斯科托普视觉 (scotopic vision) 是一种可见的视觉.有十三条线的地松鼠地松鼠.

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