相关实验视频

Updated: Jan 14, 2026

Simultaneous Electrophysiological Recording and Calcium Imaging of Suprachiasmatic Nucleus Neurons

Simultaneous Electrophysiological Recording and Calcium Imaging of Suprachiasmatic Nucleus Neurons

Published on: December 8, 2013

动物上神经核中的周神经网络

Patricia R Blakely¹, Naila F Jamani¹, Katelyn G Horsley¹

¹Department of Psychology, University of Calgary, Calgary, Alberta, Canada; Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.

|October 16, 2025

概括

大脑主时钟 (SCN) 中的周神经网络 (PNN) 根据物种不同. 在子中,PNN调节昼夜节律,但不是在小鼠或老鼠中,这表明物种特定的时钟调节.

科学领域:

神经科学是一个神经科学.
时间生物学时间生物学
细胞外矩阵生物学细胞外矩阵生物学

背景情况:

昼夜系统依赖上神核 (SCN) 进行精确的生物节奏.
周神经网络 (PNN),细胞外矩阵结构,在发育后稳定神经回路.
跨物种SCN中PNN的存在和作用在很大程度上仍然未被描述.

研究的目的:

研究小鼠,老鼠和仓鼠的SCN中PNN的存在和分布.
确定SCN中PNN形成的发展时间表.
评估PNN对昼夜时钟对光刺激反应的功能影响.

主要方法:

在成年小鼠,老鼠和仓鼠的SCN中检测PNN的免疫组织化学染色.
对PNN分布的分析,特别是与Calbindin D28K和阿尔金因血管压素表达神经元相关的分析.
从出生后20-25天开始对PNN的发育评估.
在成年仓鼠中药理上去除PNN,以评估对光引起的相位转移的影响.

主要成果:

小鼠和老鼠在SCN中呈现最小的PNN染色,而不是子,它们显示强烈的PNN染色.
在整个SCN中存在PNN,在Calbindin D28K和Arginine Vasopressin区域的度更高.
PNN在产后20-25天左右成熟,与SCN发育相吻合.
在成年仓鼠中,PNN的去除显著增强了对光脉冲的相位转移反应.

结论:

在动物物种中,PNN在SCN中表达的差异很大,在仓鼠中很突出,但在老鼠和老鼠中很少.
仓鼠SCN中的PNN是在产后发展的,并且与特定的神经元群体有关.
PNN在调节子对光的昼夜反应的可塑性方面发挥着作用,表明生物钟的物种特异性调节.

关键词:

攻击性可能会导致攻击.下丘脑的下丘脑是什么意思梅索克里塞图斯 (Mesocricetus auratus) 是一个大黄金星.肌肉是肌肉的肌肉.它们是Rattus norvegicus.威斯特里亚花结合素的结合素.冠状腺酸酶ABC 是一个

更多相关视频

Slice Preparation, Organotypic Tissue Culturing and Luciferase Recording of Clock Gene Activity in the Suprachiasmatic Nucleus

Slice Preparation, Organotypic Tissue Culturing and Luciferase Recording of Clock Gene Activity in the Suprachiasmatic Nucleus

Published on: February 15, 2011

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents

Published on: January 24, 2013

相关概念视频

The Retina

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

Circadian Rhythms and Gene Regulation

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...