Parabrachial CGRP Neurons Establish and Sustain Aversive Taste Memories.

Published on Nov 21, 2018in Neuron14.415
· DOI :10.1016/J.NEURON.2018.09.032
Jane Y Chen2
Estimated H-index: 2
(UW: University of Washington),
Carlos A. Campos5
Estimated H-index: 5
(UW: University of Washington)
+ 1 AuthorsRichard D. Palmiter161
Estimated H-index: 161
(UW: University of Washington)
Sources
Abstract
Summary Food aversions develop when the taste of a novel food is associated with sickness, which often occurs after food poisoning or chemotherapy treatment. We identified calcitonin-gene-related peptide (CGRP) neurons in the parabrachial nucleus (PBN) as sufficient and necessary for establishing a conditioned taste aversion (CTA). Photoactivating projections from CGRP PBN neurons to either the central nucleus of the amygdala or the bed nucleus of the stria terminalis can also induce robust CTA. CGRP PBN neurons undergo plasticity following CTA, and inactivation of either Ar c or Grin1 (genes involved in memory consolidation) prevents establishment of a strong CTA. Calcium imaging reveals that the novel food re-activates CGRP PBN neurons after conditioning. Inhibition of these neurons or inactivation of the Grin1 gene after conditioning attenuates CTA expression. Our results indicate that CGRP PBN neurons not only play a key role for learning food aversions but also contribute to the maintenance and expression of those memories.
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