A neural circuit mechanism integrating motivational state with memory expression in Drosophila.
A neural circuit mechanism integrating motivational state with memory expression in Drosophila.
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DOI:
10.1016/j.cell.2009.08.035
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发表时间:
2009-10-16
期刊:
影响因子:
64.5
通讯作者:
Waddell S
中科院分区:
文献类型:
--
作者:
Krashes MJ;DasGupta S;Vreede A;White B;Armstrong JD;Waddell S
Motivational states are important determinants of behavior. In fruit flies appetitive memory expression is constrained by satiety and promoted by hunger. Here we identify a neural mechanism that integrates the motivational state of hunger and memory. We show that stimulation of neurons that express Neuropeptide F (dNPF), an ortholog of mammalian NPY, mimicks food-deprivation and promotes memory performance in satiated flies. Robust appetitive memory performance requires the dNPF receptor in six dopaminergic neurons that innervate a distinct region of the mushroom bodies. Blocking these dopaminergic neurons releases memory performance in satiated flies whereas stimulation suppresses memory performance in hungry flies. Therefore dNPF and dopamine provide a motivational switch in the mushroom body that controls the output of appetitive memory.
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