Molecular annotation of integrative feeding neural circuits.
Molecular annotation of integrative feeding neural circuits.
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DOI:
10.1016/j.cmet.2010.12.013
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发表时间:
2011-02-02
期刊:
影响因子:
29
通讯作者:
Friedman JM
中科院分区:
文献类型:
--
作者:
Pérez CA;Stanley SA;Wysocki RW;Havranova J;Ahrens-Nicklas R;Onyimba F;Friedman JM
The identity of higher-order neurons and circuits playing an associative role to control feeding is unknown. We injected pseudorabies virus, a retrograde tracer, into masseter muscle, salivary gland and tongue of BAC-transgenic mice expressing GFP in specific neural populations and identified several CNS regions that project multi-synaptically to the periphery. MCH and orexin neurons were identified in the lateral hypothalamus, and Nurr1 and Cnr1 in the amygdala and insular/rhinal cortices. Cholera Toxin-β tracing showed that insular Nurr1+ and Cnr1+ neurons project to the amygdala or lateral hypothalamus, respectively. Finally we show that cortical Cnr1+ neurons show increased Cnr1 mRNA and c-Fos expression after fasting, consistent with a possible role for Cnr1+ neurons in feeding. Overall, these studies define a general approach for identifying specific molecular markers for neurons in complex neural circuits. These markers now provide a means for functional studies of relevant neurons in feeding or other complex behaviors.
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