Identification of α2‐Adrenergic Receptors in Chicken Pineal Gland Using [3H]Rauwolscine
Identification of α2‐Adrenergic Receptors in Chicken Pineal Gland Using [3H]Rauwolscine
复制标题
使用 [3H]Rauwolscine 鉴定鸡松果体中的 α2-肾上腺素能受体
DOI:
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发表时间:
1988
期刊:
影响因子:
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通讯作者:
Carla Ray
中科院分区:
文献类型:
--
作者:
D. Bylund;P. Rudeen;L. Petterborg;Carla Ray
The norepinephrine‐induced inhibition of avian pineal N‐acetyltransferase activity appears to be mediated by α2‐‐adrenergic receptors. In this study, α2‐adrenergic receptors in the chicken pineal gland were directly identified by radioligand binding. Membrane preparations of pineal glands from chickens from 1 to 6 weeks of age were examined using [3H]rauwolscine, a selective α2‐adrenergic receptor antagonist, to characterize the binding sites. The results indicate no ontological change in either the affinity (KD) or density of receptor binding sites (Bmax) during the time span examined. The binding was saturable and of high affinity with a mean KD of 0.27 ± 0.01 nM and a mean Bmax of 242 ± 12 fmol/mg protein. Further characterization of these binding sites indicated that the α2‐adrenergic receptor is of the α2A subtype, since prazosin and ARC‐239 bound with low affinities and oxymetazoline bound with high affinity.
影响因子:
2.9
作者:
Bylund,DB
通讯作者:
Bylund,DB
影响因子:
3.6
作者:
Turner,JT;Ray-Prenger,C;Bylund,DB
通讯作者:
Bylund,DB