A dopaminergic switch for fear to safety transitions.
A dopaminergic switch for fear to safety transitions.
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DOI:
10.1038/s41467-018-04784-7
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发表时间:
2018-06-27
影响因子:
16.6
通讯作者:
Johansen JP
中科院分区:
文献类型:
--
作者:
Luo R;Uematsu A;Weitemier A;Aquili L;Koivumaa J;McHugh TJ;Johansen JP
Overcoming aversive emotional memories requires neural systems that detect when fear responses are no longer appropriate so that they can be extinguished. The midbrain ventral tegmental area (VTA) dopamine system has been implicated in reward and more broadly in signaling when a better-than-expected outcome has occurred. This suggests that it may be important in guiding fear to safety transitions. We report that when an expected aversive outcome does not occur, activity in midbrain dopamine neurons is necessary to extinguish behavioral fear responses and engage molecular signaling events in extinction learning circuits. Furthermore, a specific dopamine projection to the nucleus accumbens medial shell is partially responsible for this effect. In contrast, a separate dopamine projection to the medial prefrontal cortex opposes extinction learning. This demonstrates a novel function for the canonical VTA-dopamine reward system and reveals opposing behavioral roles for different dopamine neuron projections in fear extinction learning. Fear memories are overcome only when it is ascertained that fearful responses are not appropriate. Here the authors demonstrate that activity in dopamine neurons is necessary to extinguish fear responses and two distinct dopamine neuron projections exert opposing effects on extinction learning.
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影响因子:
2.7
作者:
Hikind, Noam;Maroun, Mouna
通讯作者:
Maroun, Mouna
影响因子:
2
作者:
Holmes, Nathan M.;Leung, Hiu T.;Westbrook, R. Frederick
通讯作者:
Westbrook, R. Frederick
影响因子:
7.7
作者:
Correia, Susana S.;McGrath, Anna G.;Goosens, Ki A.
通讯作者:
Goosens, Ki A.
DOI:
10.1016/j.cub.2017.09.049
发表时间:
2017-11-20
期刊:
Current biology : CB
影响因子:
--
作者:
Chang CY;Gardner M;Di Tillio MG;Schoenbaum G
通讯作者:
Schoenbaum G
影响因子:
3.5
作者:
Gangarossa G;Espallergues J;Mailly P;De Bundel D;de Kerchove d'Exaerde A;Hervé D;Girault JA;Valjent E;Krieger P
通讯作者:
Krieger P