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首页> 外文期刊>Journal of chemical neuroanatomy >Tyrosine hydroxylase-immunoreactive neurons in the brain of tadpole of the narrow mouthed frog Microhyla ornata
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Tyrosine hydroxylase-immunoreactive neurons in the brain of tadpole of the narrow mouthed frog Microhyla ornata

机译：狭窄嘴青蛙微生物奥纳塔蝌蚪的毒素羟化酶 - 免疫反应神经元

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摘要

Catecholamines serve as a neuromodulators of many behavioral and endocrine responses in different vertebrates including amphibians. However, the neuroanatomical studies on catecholamines, especially in the tadpole brain are limited. In this study, we report the distribution of catecholaminergic neurons in different areas of the brain in the tadpole of Microhyla ornata at metamorphic climax stage. Application of antisera against tyrosine hydroxylase (TH) revealed the presence of catecholaminergic cells and fibres in the olfactory bulb, the telencephalon, the diencephalon, the mesencephalon, the spinal cord and the pituitary gland. Whereas densest aggregations of TH-immunoreactive (TH-ir) fibres were noticed in the nucleus accumbens and the amygdala pars medialis regions of the telencephalon, highest population of TH-ir cells with dorsolaterally and rostrocaudally oriented fibres was observed in the preoptic area. Larger and distinct TH-ir cell bodies along with few dorsolaterally oriented TH-ir fibres were scattered throughout the suprachiasmatic nucleus. While moderate to intensely stained clusters of TH-ir cells were observed in dorsal and ventral hypothalamic regions, conspicuous TH-ir cells and fibres were seen in the pars distalis of the pituitary gland. In the nucleus tuberculi posterioris, numerous moderate sized TH-ir cells were found along the margin of the third ventricle and the fibres from this region were oriented dorsolaterally towards the torus semicircularis and tectal regions, whereas well organized largest TH-ir cells and fibres were seen in the tegmentum. In the spinal cord, medium sized TH-ir cells along with numerous laterally running fibres were encountered. Overall, widespread distribution of the TH-ir cells and fibres in the brain and the pituitary gland of the tadpole suggest diverse roles for the catecholamines in regulation of locomotion, olfaction, skin pigmentation and endocrine responses during final stages of metamorphosis in M. ornate.
机译：儿茶酚胺用作许多行为和内分泌反应的神经调节剂，包括两栖动物在内的不同脊椎动物。然而，对儿茶酚胺的神经杀菌研究，特别是在蝌蚪脑中有限。在这项研究中，我们在Metalyhyla ornata的蝌蚪在变质高潮阶段报告了在Microhyla ornata蝌蚪的不同区域中的儿茶酚胺能神经元的分布。抗血清对酪氨酸羟化酶（Th）的应用揭示了嗅灯泡中的儿科药能细胞和纤维的存在，瞳孔，DiETyphalon，中源肾，脊髓和垂体腺体中的存在。虽然在核心尿嘧啶中注意到抗免疫反应性（TH-IR）纤维的密度聚集，并且在斜视骨咽部的Amygdala pars Medialis区域，在诱导区域中观察到具有背面层和脊髓糖的纤维的最高群体。较大而不同的TH-IR细胞体以及少量背面层导向的TH-IR纤维散射在整个核心中。在背部和腹侧下丘脑区域观察到中等至染色的TH-IR细胞的簇簇，在垂体腺体的PARS DISTALIS中观察到显着的TH-IR细胞和纤维。在细胞核结核后后核中，沿着第三脑室的边缘发现许多中等大小的TH-IR细胞，并且来自该区域的纤维朝向圆环覆盖物和细胞区域取向，而组织良好的最大TH-IR细胞和纤维在tegmentum中看到。在脊髓中，遇到中尺寸的TH-IR细胞以及许多横向运行的纤维。总体而言，蝌蚪脑和垂体纤维的广泛分布在蝌蚪的垂体腺体和垂体腺体中表达了在M. Ornate的变态的最终阶段的运动，嗅觉，皮肤色素沉着和内分泌反应中的不同作用。

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