...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Comparative Neurology >Neurosensory and neuromuscular organization in tube feet of the sea urchin Strongylocentrotus purpuratus.
【24h】

Neurosensory and neuromuscular organization in tube feet of the sea urchin Strongylocentrotus purpuratus.

机译：海胆管足紫Strong的神经感觉和神经肌肉组织。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Several behavioral and electrophysiological studies indicate that all classes of echinoderms, including Echinoidia, the class to which sea urchins belong, are photosensitive and exhibit complex behavioral responses to light or changes in light intensity. However, no discrete photosensitive structure has been identified in sea urchins. The purpose of this study was to provide new insights into eye evolution by determining whether distinct photosensory structures are present in adult sea urchins. Recently, we showed that the Strongylocentrotus purpuratus genome contains orthologs of many mammalian retinal genes and that these genes are expressed in tube feet, suggesting the presence of photoreceptor neurons. To determine whether this is so, we identified several features of tube feet that relate to a possible invertebrate phototransduction system. We show that rhabdomeric opsin is expressed severalfold higher within the disk region of the tube feet and is the most abundant opsin. Immunostaining identified betaIII-tubulin-expressing cells at the periphery of disk in the vicinity of the synaptotagmin-expressing nerve fibers. We also showed that Pax6 expression in the disk was restricted to the periphery, where small clusters of putative sensory neurons reside. Our results reveal neuromuscular organization of the tube foot neuromuscular system. They further support earlier studies suggesting the presence of a photosensory system in tube feet.
机译：若干行为和电生理研究表明，所有棘皮动物类，包括海胆所属的棘皮动物，都是光敏的，对光或光强度的变化表现出复杂的行为反应。但是，在海胆中没有发现离散的光敏结构。这项研究的目的是通过确定成年海胆中是否存在不同的光敏结构，为眼睛进化提供新的见解。最近，我们显示了紫罗兰（Strongylocentrotus purpuratus）基因组包含许多哺乳动物视网膜基因的直系同源物，并且这些基因在管脚中表达，表明存在感光神经元。为了确定是否如此，我们确定了与可能的无脊椎动物光转导系统有关的管脚的几个特征。我们显示，横纹肌球蛋白表达在管脚的盘状区域内高出几倍，并且是最丰富的视蛋白。免疫染色鉴定表达βIII-微管蛋白的细胞在表达突触结合蛋白的神经纤维附近的盘周围。我们还表明，Pax6在磁盘中的表达仅限于外围，假定的感觉神经元小簇位于其中。我们的结果揭示了管足神经肌肉系统的神经肌肉组织。他们进一步支持早期研究，表明管脚中存在光感测系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号