TY - JOUR
T1 - Indirect medium spiny neurons in the dorsomedial striatum regulate ethanol-containing conditioned reward seeking
AU - Hong, Sa Ik
AU - Kang, Seungwoo
AU - Chen, Jiang Fan
AU - Choi, Doo Sup
N1 - Publisher Copyright:
Copyright © 2019 the authors.
PY - 2019/9/4
Y1 - 2019/9/4
N2 - Adenosine 2A receptor (A2AR)-containing indirect medium spiny neurons (iMSNs) in the dorsomedial striatum (DMS) contribute to reward-seeking behaviors. However, those roles for ethanol-seeking behaviors remain unknown. To investigate ethanol-seeking behaviors, we used an ethanol-containing reward (10% ethanol and 10% sucrose solution; 10E10S). Upon conditioning with 10E10S, mice that initially only preferred 10% sucrose, not 10E10S, showed a stronger preference for 10E10S. Then, we investigated whether the manipulation of the DMS– external globus pallidus (GPe) iMSNs circuit alters the ethanol-containing reward (10E10S) seeking behaviors using the combination of pharmacologic and optogenetic approaches. DMS A2AR activation dampened operant conditioning-induced ethanol-containing reward, whereas A2AR antagonist abolished the effects of the A2AR agonist and restored ethanol-containing reward-seeking. Moreover, pre-ethanol exposure potentiated the A2AR-dependent reward-seeking. Interestingly, mice exhibiting ethanol-containing reward-seeking showed the reduction of the DMS iMSNs activity, suggesting that disinhibiting iMSNs decreases reward-seeking behaviors. In addition, we found that A2AR activation reversed iMSNs neural activity in the DMS. Similarly, optogenetic stimulation of the DMS-GPe iMSNs reduced ethanol-containing reward-seeking, whereas optogenetic inhibition of the DMS-GPe iMSNs reversed this change. Together, our study demonstrates that DMS A2AR and iMSNs regulate ethanol-containing reward-seeking behaviors.
AB - Adenosine 2A receptor (A2AR)-containing indirect medium spiny neurons (iMSNs) in the dorsomedial striatum (DMS) contribute to reward-seeking behaviors. However, those roles for ethanol-seeking behaviors remain unknown. To investigate ethanol-seeking behaviors, we used an ethanol-containing reward (10% ethanol and 10% sucrose solution; 10E10S). Upon conditioning with 10E10S, mice that initially only preferred 10% sucrose, not 10E10S, showed a stronger preference for 10E10S. Then, we investigated whether the manipulation of the DMS– external globus pallidus (GPe) iMSNs circuit alters the ethanol-containing reward (10E10S) seeking behaviors using the combination of pharmacologic and optogenetic approaches. DMS A2AR activation dampened operant conditioning-induced ethanol-containing reward, whereas A2AR antagonist abolished the effects of the A2AR agonist and restored ethanol-containing reward-seeking. Moreover, pre-ethanol exposure potentiated the A2AR-dependent reward-seeking. Interestingly, mice exhibiting ethanol-containing reward-seeking showed the reduction of the DMS iMSNs activity, suggesting that disinhibiting iMSNs decreases reward-seeking behaviors. In addition, we found that A2AR activation reversed iMSNs neural activity in the DMS. Similarly, optogenetic stimulation of the DMS-GPe iMSNs reduced ethanol-containing reward-seeking, whereas optogenetic inhibition of the DMS-GPe iMSNs reversed this change. Together, our study demonstrates that DMS A2AR and iMSNs regulate ethanol-containing reward-seeking behaviors.
KW - AR
KW - Dorsomedial striatum
KW - Ethanol
KW - Medium spiny neuron
KW - Reward
UR - http://www.scopus.com/inward/record.url?scp=85071784165&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071784165&partnerID=8YFLogxK
U2 - 10.1523/JNEUROSCI.0876-19.2019
DO - 10.1523/JNEUROSCI.0876-19.2019
M3 - Article
C2 - 31315945
AN - SCOPUS:85071784165
SN - 0270-6474
VL - 39
SP - 7206
EP - 7217
JO - Journal of Neuroscience
JF - Journal of Neuroscience
IS - 36
ER -