The effects of Cirazoline, an alpha-1 adrenoreceptor agonist, on the firing rates of thermally classified anterior hypothalamic neurons in rat brain slices.
The effects of Cirazoline, an alpha-1 adrenoreceptor agonist, on the firing rates of thermally classified anterior hypothalamic neurons in rat brain slices.
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西拉唑啉(一种 α-1 肾上腺素受体激动剂)对大鼠脑切片中热分类下丘脑前神经元放电率的影响。
DOI:
10.1016/j.brainres.2007.12.016
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发表时间:
2008
期刊:
影响因子:
2.9
通讯作者:
Griffin,JohnD
中科院分区:
文献类型:
--
作者:
Imbery,TedE;Irdmusa,MitraS;Speidell,AndrewP;Streer,MarkS;Griffin,JohnD
Peripheral exposure to LPS induces a biphasic fever thought to be initiated via vagal afferents to the preoptic area of the anterior hypothalamus (POAH), an important thermoregulatory control center in the brain. Previous studies have shown that norepinephrine synaptically mediates this Prostaglandin E2(PGE2)-dependent change in temperature through the selective activation of alpha-2 adrenoreceptors (AR). However, there is clear evidence that alpha-1 AR activation of thermoregulatory hypothalamic neurons will result in a rapid hyperthermia that is not dependent on PGE2. This direct action of norepinephrine in the POAH was tested in the present study by recording the single-unit activity of POAH neurons in a tissue slice preparation from the adult male rat, in response to temperature and the selective alpha-1 AR agonist Cirazoline (1–100 μM). Neurons were classified as either warm sensitive or temperature insensitive. Warm sensitive neurons responded to Cirazoline with a decrease in firing rate, while temperature insensitive neurons showed a firing rate increase. These responses are similar to those reported for PGE2and suggest that both warm sensitive and temperature insensitive neurons in the POAH are important in mediating this alpha-1 AR-dependent hyperthermic shift in body temperature.
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DOI:
--
发表时间:
1985
期刊:
International Journal of Nuclear Medicine and Biology
影响因子:
--
作者:
S. Moerlein;P. Laufer;G. Stöcklin
通讯作者:
G. Stöcklin
影响因子:
2.9
作者:
N. Klemm;L. Murrin;M. Kuhar
通讯作者:
M. Kuhar
影响因子:
1.9
作者:
YoonYeo Dae;D. Kiesewetter;J. Katzenellenbogen;M. Kilbourn;M. Welch
通讯作者:
M. Welch
影响因子:
6.1
作者:
Welch,MJ;Kilbourn,MR;Mathias,CJ;Mintun,MA;Raichle,ME
通讯作者:
Raichle,ME
影响因子:
2.9
作者:
T. Tewson;M. Raichle;M. Welch
通讯作者:
M. Welch