Possible interactions of a steroid hormone and neural inputs in controlling the death of an identified neuron in the moth Manduca sexta.

Possible interactions of a steroid hormone and neural inputs in controlling the death of an identified neuron in the moth Manduca sexta.
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类固醇激素和神经输入在控制天蛾天蛾中已识别的神经元死亡方面可能存在相互作用。

DOI:
10.1002/neu.480180603
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发表时间:
1987
期刊:
Journal of neurobiology
影响因子:
--
通讯作者:
Truman,JW
Truman,JW
中科院分区:
--
文献类型:
--
作者:
Fahrbach,SE;Truman,JW

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成年曼都卡六长蛾的出现伴随着这种昆虫腹部运动神经元和中间神经元几乎一半的丧失(Truman, 1983)。这种程序性细胞死亡完成了毛毛虫神经系统向飞蛾神经系统的转变。这些神经元的死亡先前已被证明是对内分泌信号的反应:在变态结束时发生的外甾体激素的下降(Truman和Schwartz, 1984)。我们目前的研究主要集中在第三腹部神经节中一对已识别的运动神经元MN - 12细胞的命运调节。将这个神经节从神经系统的前部分离出来,可以防止这些细胞的死亡,而这些细胞通常会因外皮质激素的下降而死亡。腹侧神经索在不同水平上的横断显示,这种调节性“死亡信号”︁的来源是融合的翼胸神经节,并通过节间连接传递。我们假设,介导这种效应的因素可能与外皮质激素的下降协同作用,以指定单个神经元的确切死亡时间。
The emergence of the adultManduca sextamoth is followed by the loss of almost half of this insect's abdominal motoneurons and interneurons (Truman, 1983). This programmed cell death completes the transformation of the nervous system of the caterpillar into that of the moth. The death of these neurons has been previously shown to be a response to an endocrine signal: the decline in ecdysteroids that occurs at the end of metamorphosis (Truman and Schwartz, 1984). Our current research is focussed on the regulation of the fate of a pair of identified motoneurons, the MN‐12 cells, in the third abdominal ganglion. Isolation of this ganglion from anterior parts of the nervous system can prevent the death of these cells at the time when they would normally die in response to the decline in ecdysteroids. Transection of the ventral nerve cord at various levels revealed that the source of this regulatory „death signal”︁ is the fused pterothoracic ganglion and that it is transmitted via the interganglionic connectives. We hypothesize that the factors mediating this effect may act in concert with the ecdysteroid decline to specify the exact time of death for individual neurons.
通过扩大外周减少自然发生的运动神经元损失
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