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在Caenophidian蛇的外视网膜光受体中的异常视觉-奥普辛同表达和表型多样性

Einat Hauzman^1,2, Silke Haverkamp³, Juliana H Tashiro¹

¹Department of Experimental Psychology, Psychology Institute, University of São Paulo, São Paulo, Brazil.

The Journal of comparative neurology

|October 7, 2025

概括

蛇的视网膜显示出摄影受体类型和视觉色素表达的惊人多样性,揭示了白天和夜间物种的独特适应性. 这些发现强调了蛇是研究脊椎动物视觉演变的关键模型.

科学领域:

* 脊椎动物视觉进化过程
* 较量眼科眼科比较
* 进化发育生物学进化发育生物学

背景情况:

* 蛇表现出多种视网膜适应,包括双重 (棍) 和简单 (全) 系统.
* Caenophidian蛇,特别是白天活动的物种,具有独特的视网膜结构,缺乏典型的杆子.
*像罗多普辛 (RH1) 和素 (SWS1,LWS) 这样的视觉颜料在蛇的视力中起着至关重要的作用.

研究的目的:

* 为了研究caenophidian蛇视网膜中的光受体形态和视觉-opsin表达.
* 分析视觉细胞结构和opsin联合表达模式的跨种类变异性.
* 了解蛇的视觉系统的进化适应.

主要方法:

*高分辨率扫描电子显微镜 (SEM) 用于详细的光感应器形态学.
* 免疫组织化学 (IHC) 检查视觉素表达模式.
*光显微镜和十种物种的整体视网膜分析.

主要成果:

* 昼间类动物表现出RH1-表达光受体的状形态,表明转化了杆子.
*在个体中观察到素 (SWS1,LWS,RH1) 的同时表达,特别是在白天活动的物种中.
*发现光受体密度,分布和opsin共同表达的显著物种特异.

结论:

* 蛇的视网膜在光受体结构和功能方面表现出了显著的多样性和适应性创新.
* 在状细胞和多素体中的Rhodopsin表达代表了独特的进化策略.
* 蛇为研究脊椎动物视觉系统的进化和功能提供了一个特殊的模型.

关键词:

多个opsin 圆.选项表达式的选择表达式光感受体形态学光感受体形态学视网膜地形图视网膜地形图蛇的视网膜是一种视网膜.

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