Neuron‐type specific cannabinoid‐mediated G protein signalling in mouse hippocampus
Neuron‐type specific cannabinoid‐mediated G protein signalling in mouse hippocampus
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小鼠海马神经元类型特异性大麻素介导的 G 蛋白信号传导
DOI:
10.1111/jnc.12137
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发表时间:
2013
影响因子:
4.7
通讯作者:
Monory K
中科院分区:
文献类型:
--
作者:
Steindel F;Lerner R;Häring M;Ruehle S;Marsicano G;Lutz B;Monory K
Type 1 cannabinoid receptor (CB1) is expressed in different neuronal populations in the mammalian brain. In particular, CB1 on GABAergic or glutamatergic neurons exerts different functions and display different pharmacological propertiesin vivo. This suggests the existence of neuron‐type specific signalling pathways activated by different subpopulations of CB1. In this study, we analysed CB1 expression, binding and signalling in the hippocampus of conditional mutant mice, bearing CB1 deletion in GABAergic (GABA‐CB1‐KO mice) or cortical glutamatergic neurons (Glu‐CB1‐KO mice). Compared to their wild‐type littermates, Glu‐CB1‐KO displayed a small decrease of CB1 mRNA amount, immunoreactivity and [³H]CP55,940 binding. Conversely, GABA‐CB1‐KO mice showed a drastic reduction of these parameters, confirming that CB1 is present at much higher density on hippocampal GABAergic interneurons than glutamatergic neurons. Surprisingly, however, saturation analysis of HU210‐stimulated [35S]GTPγS binding demonstrated that ‘glutamatergic’ CB1 is more efficiently coupled to G protein signalling than ‘GABAergic’ CB1. Thus, the minority of CB1 on glutamatergic neurons is paradoxically several fold more strongly coupled to G protein signalling than ‘GABAergic’ CB1. This selective signalling mechanism raises the possibility of designing novel cannabinoid ligands that differentially activate only a subset of physiological effects of CB1 stimulation, thereby optimizing therapeutic action.
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影响因子:
--
作者:
Bash, R;Rukovitch, V;Sarne, Y
通讯作者:
Sarne, Y
DOI:
--
发表时间:
1997
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
Breivogel,CS;Sim,LJ;Childers,SR
通讯作者:
Childers,SR
影响因子:
3.7
作者:
Häring M;Kaiser N;Monory K;Lutz B
通讯作者:
Lutz B
DOI:
--
发表时间:
1998
期刊:
Pharmacology, Biochemistry and Behavior
影响因子:
--
作者:
E. Šulcová;R. Mechoulam;E. Fride
通讯作者:
E. Fride
影响因子:
25
作者:
Marinelli, Silvia;Pacioni, Simone;Bacci, Alberto
通讯作者:
Bacci, Alberto