长期调节哺乳动物丘脑中的电突触
Carole E Landisman1, Barry W Connors
1Department of Neuroscience, Division of Biology and Medicine, Brown University, Providence, RI 02912, USA. Carole_Landisman@hms.harvard.edu
Science (New York, N.Y.)
|December 17, 2005
概括
科学家们发现,激活谷氨酸受体会削弱大鼠乳头网状核中抑制神经元之间的电突触. 这一发现揭示了大脑中电突触的调节.
科学领域:
- 神经科学是一个神经科学.
- 突触性可塑性 突触性可塑性
- 哺乳动物大脑研究研究
背景情况:
- 电突触在哺乳动物丘脑和新皮层中的抑制神经元之间很普遍.
- 突触调制对于神经通信灵活性至关重要,但在哺乳动物的电突触上仍未得到充分研究.
研究的目的:
- 研究哺乳动物大脑中电突触强度的调节.
- 检查metabotropic谷氨酸受体在调节电突触传输中的作用.
主要方法:
- 在大脑切片中利用了电生理学记录.
- 使用内源性神经递质和激动剂激活的甲基胺基因组受体.
- 测量了大鼠胸膜网状核中抑制神经元之间的电突触强度的变化.
主要成果:
- 甲基酸盐受体的激活导致了长期减少电突触强度.
- 这种调制观察到在老鼠体网状核的抑制神经元中.
结论:
- 甲基托基谷氨酸受体的激活可以显著降低电突触的有效性.
- 这项研究为哺乳动物大脑中电突触调节的机制提供了新的见解.
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