A Point Mutation (D79N) of the α2A Adrenergic Receptor Abolishes the Antiepileptogenic Action of Endogenous Norepinephrine
A Point Mutation (D79N) of the α2A Adrenergic Receptor Abolishes the Antiepileptogenic Action of Endogenous Norepinephrine
复制标题
α2A 肾上腺素受体的点突变 (D79N) 消除了内源性去甲肾上腺素的抗癫痫作用
作者:
S. Janumpalli;L. Butler;L. Macmillan;L. Limbird;J. McNamara
Norepinephrine serves as a neurotransmitter for a population of neurons the cell bodies of which reside in a brainstem nucleus and the axons of which project widely to discrete subsets of forebrain neurons. Norepinephrine powerfully inhibits epileptogenesis in the kindling model. Pharmacological methods have demonstrated that the antiepileptogenic actions of norepinephrine are exerted via α2 adrenergic receptors residing on targets of noradrenergic neurons. The existence of three α2 adrenergic receptor subtypes together with the lack of subtype-specific ligands has precluded understanding the role of individual α2 adrenergic receptor subtypes in the antiepileptogenic actions of norepinephrine. Gene targeting was used to introduce a point mutation into the α2A adrenergic subtype in the mouse genome. The mutation produced a marked enhancement of epileptogenesis and abolished the proepileptogenic actions of the α2 adrenergic receptor antagonist idazoxan. These studies reveal the crucial contribution of the α2A receptor subtype in suppression of epileptogenesis. Development of agents that promote selective activation of the α2A receptor subtype may provide novel therapeutic strategies for the prophylaxis of epilepsy.
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DOI:
10.1073/pnas.94.18.9950
发表时间:
1997-09-02
影响因子:
11.1
作者:
Lakhlani, PP;MacMillan, LB;Limbird, LE
通讯作者:
Limbird, LE
DOI:
--
发表时间:
1990
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
Chen,LS;Weingart,JB;McNamara,JO
通讯作者:
McNamara,JO
影响因子:
2.5
作者:
MCINTYRE, DC;WONG, RKS
通讯作者:
WONG, RKS
DOI:
--
发表时间:
1987
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
Gellman,RL;Kallianos,JA;McNamara,JO
通讯作者:
McNamara,JO