From Embryo to Adult: Persistent Neurogenesis and Apoptotic Cell Death Shape the Lobster Deutocerebrum

From Embryo to Adult: Persistent Neurogenesis and Apoptotic Cell Death Shape the Lobster Deutocerebrum
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从胚胎到成体:持续的神经发生和细胞凋亡塑造了龙虾的副大脑

DOI:
10.1523/jneurosci.19-09-03472.1999
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发表时间:
1999
期刊:
The Journal of Neuroscience
影响因子:
--
通讯作者:
B. Beltz
B. Beltz
中科院分区:
--
文献类型:
--
作者:
S. Harzsch;Julie M. Miller;Jeannie Benton;B. Beltz

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神经元的可塑性和突触重塑在无脊椎动物神经系统发育过程中起着重要作用。此外,由于长期的环境变化,行为改变,年龄和经验的结构神经可塑性已在性成熟昆虫的大脑中得到证实。在成年脊椎动物中,在哺乳动物海马和脑室下区的颗粒细胞层以及鸣禽的端脑中发现了持续的神经发生,这表明持续的神经发生可能与可塑性和学习有关,可能是成熟大脑正常生物学的一个组成部分。在十足类甲壳动物中,嗅觉投射神经元之间的持续神经发生是塑造成年大脑的共同原则,表明终身结构可塑性的显着程度。本研究通过描述美国龙虾Homarus americanus从早期胚胎到幼虫和少年阶段到成年生活的中央嗅觉通路中的连续细胞增殖和增殖结构域的逐渐位移,填补了我们对这种现象的认识中的空白。在中脑的神经发生进行了检查,在体内掺入溴脱氧尿苷,和发育和结构成熟的中脑神经鞘进行了研究,使用免疫组织化学对果蝇突触蛋白。使用末端脱氧核苷酸转移酶介导的生物素化UTP缺口末端标记法,结合使用抗磷酸化组蛋白H3有丝分裂标记的免疫标记,研究了凋亡细胞死亡在形成发育中的中脑中的作用。我们的研究结果表明,在青少年和成年龙虾,出生和死亡的嗅觉中间神经元平行发生,这表明这些细胞的营业额。当持久的神经发生和并发死亡的中间神经元在中央嗅觉通路的甲壳动物大脑中的甲壳动物触角的嗅觉受体细胞的终身营业额考虑在内,一个新的,高度动态的图片在甲壳动物的嗅觉出现。
Neuronal plasticity and synaptic remodeling play important roles during the development of the invertebrate nervous system. In addition, structural neuroplasticity as a result of long-term environmental changes, behavioral modifications, age, and experience have been demonstrated in the brains of sexually mature insects. In adult vertebrates, persistent neurogenesis is found in the granule cell layer of the mammalian hippocampus and the subventricular zone, as well as in the telencephalon of songbirds, indicating that persistent neurogenesis, which is presumably related to plasticity and learning, may be an integral part of the normal biology of the mature brain. In decapod crustaceans, persistent neurogenesis among olfactory projection neurons is a common principle that shapes the adult brain, indicating a remarkable degree of life-long structural plasticity. The present study closes a gap in our knowledge of this phenomenon by describing the continuous cell proliferation and gradual displacement of proliferation domains in the central olfactory pathway of the American lobsterHomarus americanus from early embryonic through larval and juvenile stages into adult life. Neurogenesis in the deutocerebrum was examined by the in vivo incorporation of bromodeoxyuridine, and development and structural maturation of the deutocerebral neuropils were studied using immunohistochemistry against Drosophila synapsin. The role of apoptotic cell death in shaping the developing deutocerebrum was studied using the terminal deoxynucleotidyl transferase-mediated biotinylated UTP nick end labeling method, combined with immunolabeling using an antiphospho histone H3 mitosis marker. Our results indicate that, in juvenile and adult lobsters, birth and death of olfactory interneurons occur in parallel, suggesting a turnover of these cells. When the persistent neurogenesis and concurrent death of interneurons in the central olfactory pathway of the crustacean brain are taken into account with the life-long turnover of olfactory receptor cells in crustacean antennules, a new, highly dynamic picture of olfaction in crustaceans emerges.
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DOI: 10.1002/neu.480220402
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影响因子: --
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DOI: 10.2307/1543063
发表时间: 1996
期刊: The Biological bulletin
影响因子: --
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影响因子: --
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发表时间: 1998-08-01
期刊: JOURNAL OF NEUROBIOLOGY
影响因子: --
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