Apo-ghrelin receptor forms heteromers with DRD2 in hypothalamic neurons and is essential for anorexigenic effects of DRD2 agonism.
Apo-ghrelin receptor forms heteromers with DRD2 in hypothalamic neurons and is essential for anorexigenic effects of DRD2 agonism.
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DOI:
10.1016/j.neuron.2011.10.038
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发表时间:
2012-01-26
期刊:
影响因子:
16.2
通讯作者:
Smith RG
中科院分区:
文献类型:
--
作者:
Kern A;Albarran-Zeckler R;Walsh HE;Smith RG
We identified subsets of neurons in the brain that co-express the dopamine receptor subtype-2 (DRD2) and the ghrelin receptor (GHSR1a). Combination of FRET confocal microscopy and Tr-FRET established the presence of GHSR1a:DRD2 heteromers in hypothalamic neurons. To interrogate function, mice were treated with the selective DRD2 agonist cabergoline which produced anorexia in wild-type and ghrelin−/− mice; intriguingly, ghsr−/− mice were refractory illustrating dependence on GHSR1a, but not ghrelin. Elucidation of mechanism showed that formation of GHSR1a:DRD2 heteromers allosterically modifies canonical DRD2 dopamine signaling resulting in Gβγ subunit-dependent mobilization of [Ca2+]i independent of GHSR1a basal activity. By targeting the interaction between GHSR1a and DRD2 in wild-type mice with a highly selective GHSR1a antagonist (JMV2959) cabergoline–induced anorexia was blocked. Inhibiting dopamine signaling in subsets of neurons with a GHSR1a antagonist has profound therapeutic implications by providing enhanced selectivity because neurons expressing DRD2 alone would be unaffected.
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影响因子:
14.8
作者:
Albizu L;Cottet M;Kralikova M;Stoev S;Seyer R;Brabet I;Roux T;Bazin H;Bourrier E;Lamarque L;Breton C;Rives ML;Newman A;Javitch J;Trinquet E;Manning M;Pin JP;Mouillac B;Durroux T
通讯作者:
Durroux T
影响因子:
16.2
作者:
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通讯作者:
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影响因子:
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DOI:
10.1016/s0169-328x(97)00071-5
发表时间:
1997-08-01
期刊:
MOLECULAR BRAIN RESEARCH
影响因子:
--
作者:
Guan, XM;Yu, H;Howard, AD
通讯作者:
Howard, AD
DOI:
10.1152/ajpregu.00092.2002
发表时间:
2002-10-01
影响因子:
2.8
作者:
Fetissov, SO;Meguid, MM;Zhang, LH
通讯作者:
Zhang, LH