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首页> 外文期刊>Zoological Science >Transposon-mediated Enhancer Detection Reveals the Location, Morphology and Development of the Cupular Organs, which are Putative Hydrodynamic Sensors, in the Ascidian Ciona intestinalis
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Transposon-mediated Enhancer Detection Reveals the Location, Morphology and Development of the Cupular Organs, which are Putative Hydrodynamic Sensors, in the Ascidian Ciona intestinalis

机译：转座子介导的增强子检测揭示了海鞘Cioa肠中杯形器官的位置，形态和发育，它们是推定的水动力传感器。

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摘要

The adult of the ascidian Ciona intestinalis has cupular organs, i.e., putative hydrodynamic sensors, at the atrial epithelium. The cupular organ consists of support cells and sensory neurons, and it extends a gelatinous matrix, known as a cupula, toward the atrial cavity. These characteristics are shared with sensory hair cells in the vertebrate inner ear and lateral line neuromasts in fish and amphibians, which suggests an evolutionary link between the cupular organ and these vertebrate hydrodynamic sensors. In the present study, we have isolated and investigated two transposon-mediated enhancer detection lines that showed GFP expression in support cells of the cupular organs. Using the enhancer detection lines and neuron marker transgenic lines, we describe the position, morphology, and development of the cupular organs. Cupular organs were found at the atrial epithelium, but not in the branchial epithelium. We found that cupular organs are also present along the dorsal fold and the gonoducts. The cells lining the pre-atrial opening in juveniles are presumably precursor cells of the cupular organ. To our knowledge, the present study is the first precise description of the ascidian cupular organ, providing evidence that may help to resolve discrepancies among previous studies on the organ.
机译：海生小肠Ciona肠的成虫在心房上皮具有杯状器官，即推定的流体动力传感器。杯状器官由支持细胞和感觉神经元组成，并向心腔延伸一种称为杯状的凝胶状基质。这些特征与脊椎动物内耳的感官毛细胞以及鱼类和两栖动物的侧线神经母细胞共有，这表明杯形器官与这些脊椎动物流体动力传感器之间存在进化联系。在本研究中，我们已经分离并研究了两个转座子介导的增强子检测线，这些检测线在杯状器官的支持细胞中显示了GFP表达。使用增强子检测系和神经元标记转基因系，我们描述了杯状器官的位置，形态和发育。在心房上皮中发现杯状器官，但在branch上皮中未发现。我们发现杯状器官也存在于背褶和淋巴管中。青少年心房开口前的细胞可能是杯状器官的前体细胞。据我们所知，本研究是对海豚杯状器官的第一个精确描述，提供的证据可能有助于解决先前对该器官的研究之间的差异。

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