Activity-dependent expression of Lmx1b regulates specification of serotonergic neurons modulating swimming behavior.

Activity-dependent expression of Lmx1b regulates specification of serotonergic neurons modulating swimming behavior.
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DOI:
10.1016/j.neuron.2010.06.006
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发表时间:
2010-07-29
期刊:
影响因子:
16.2
通讯作者:
Spitzer, Nicholas C.
Spitzer, Nicholas C.
中科院分区:
医学1区
文献类型:
--
作者:
Demarque, Michael;Spitzer, Nicholas C.

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遗传程序、环境因素和电活动相互作用,推动大脑的成熟。虽然级联的转录因子,导致规范的多巴胺能表型已得到很好的表征,其与电活动的相互作用是未知的。在这里,我们表明,自发钙峰活动在后脑发育的X。laevis幼虫通过调节Lmx 1b转录因子的表达来调节肾上腺素能神经元的特化。活性作用于Nkx2.2的下游,但Lmx 1b的上游,导致调节β-肾上腺素能表型。使用全球操纵的活动和有针对性的改变Lmx 1b的表达,我们还表明,在数量上的变化的神经元的变化幼虫的游泳行为。这些结果将转录因子的活性依赖性调节与递质特异性和行为改变联系起来。
Genetic programs, environmental factors and electrical activity interact to drive the maturation of the brain. Although the cascade of transcription factors that leads to specification of the serotonergic phenotype has been well characterized, its interactions with electrical activity are not known. Here we show that spontaneous calcium spike activity in the hindbrain of developing X. laevis larvae modulates the specification of serotonergic neurons via regulation of expression of the Lmx1b transcription factor. Activity acts downstream of Nkx2.2 but upstream of Lmx1b, leading to regulation of the serotonergic phenotype. Using global manipulation of activity and targeted alteration of Lmx1b expression, we also demonstrate that changes in the number of serotonergic neurons change larval swimming behavior. The results link activity-dependent regulation of a transcription factor to transmitter specification and altered behavior.
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