A pair of inhibitory neurons are required to sustain labile memory in the Drosophila mushroom body.
A pair of inhibitory neurons are required to sustain labile memory in the Drosophila mushroom body.
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DOI:
10.1016/j.cub.2011.03.069
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发表时间:
2011-05-24
期刊:
影响因子:
9.2
通讯作者:
Waddell, Scott
中科院分区:
文献类型:
--
作者:
Pitman, Jena L.;Huetteroth, Wolf;Burke, Christopher J.;Krashes, Michael J.;Lai, Sen-Lin;Lee, Tzumin;Waddell, Scott
Labile memory is thought to be held in the brain as persistent neural network activity. However, it is not known how biologically relevant memory circuits are organized and operate. Labile and persistent appetitive memory in Drosophila requires output after training from the α′β′ subset of mushroom body (MB) neurons and from a pair of modulatory Dorsal Paired Medial (DPM) neurons. DPM neurons innervate the entire MB lobe region and appear to be pre- and post-synaptic to the MB, consistent with a recurrent network model. Here we identify a role after training for synaptic output from the GABAergic Anterior Paired Lateral (APL) neurons. Blocking synaptic output from APL neurons after training disrupts labile memory but does not affect long-term memory. APL neurons contact DPM neurons most densely in the α′β′ lobes although their processes are intertwined and contact throughout all the lobes. Furthermore, APL contacts MB neurons in the α′ lobe but makes little direct contact with those in the distal α lobe. We propose that APL neurons provide widespread inhibition to stabilize and maintain synaptic specificity of a labile memory trace in a recurrent DPM and MB α′β′ neuron circuit.
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DOI:
10.1073/pnas.90.17.8123
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