PDF-1 neuropeptide signaling modulates a neural circuit for mate-searching behavior in C. elegans.

PDF-1 neuropeptide signaling modulates a neural circuit for mate-searching behavior in C. elegans.
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DOI:
10.1038/nn.3253
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发表时间:
2012-12
影响因子:
25
通讯作者:
Barr, Maureen M.
Barr, Maureen M.
中科院分区:
医学1区
文献类型:
--
作者:
Barrios, Arantza;Ghosh, Rajarshi;Fang, Chunhui;Emmons, Scott W.;Barr, Maureen M.

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食欲行为需要复杂的决策,涉及环境刺激和生理需求的整合。线虫的求偶行为是一种雄性特有的探索行为,受到两种相互竞争的需求的调节:食物与生殖欲望。在这里,我们展示了色素分散因子受体(PDFR-1)调节编码男性生殖驱动力的电路,促进男性在配偶剥夺时进行探索。 PDFR-1 及其配体 PDF-1 刺激雄性寻找配偶,但不刺激雌雄同体。 pdf-1 在性别共享中间神经元 AIM 中是必需的,该受体在共享神经系统(URY、PQR 和 PHA)的内部和外部环境感知神经元中起作用,以产生配偶搜索行为。因此,pdf-1/pdfr-1 通路在非性别特异性神经元中发挥作用,产生男性特异性、目标导向的探索行为。我们的结果表明促胰液素神经肽能信号在调节动机内部状态中发挥着古老的作用。
Appetitive behaviors require complex decision-making, involving the integration of environmental stimuli and physiological needs. C. elegans mate searching is a male-specific exploratory behavior regulated by two competing needs: food versus reproductive appetite. Here we show that the Pigment Dispersing Factor Receptor (PDFR-1) modulates the circuit that encodes the male reproductive drive promoting male exploration upon mate-deprivation. PDFR-1 and its ligand PDF-1 stimulate mate searching in the male but not in the hermaphrodite. pdf-1 is required in the gender-shared interneuron AIM and the receptor acts in internal and external environment-sensing neurons of the shared nervous system (URY, PQR and PHA) to produce mate-searching behavior. Thus, the pdf-1/pdfr-1 pathway functions in non sex-specific neurons to produce a male-specific, goal-oriented exploratory behavior. Our results indicate that secretin neuropeptidergic signaling plays an ancient role in regulating motivational internal states.
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