一个大黄蜂大脑细胞普查揭示了细胞身份的区域专业化
Fenna M Krienen1,2, Kirsten M Levandowski2,3,4, Heather Zaniewski2,3,4
1Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
Science advances
|October 12, 2023
概括
这项研究表明,神经元的发育起源,而不是神经递质,主要在灵长类大脑中塑造其成年身份. 研究人员绘制了超过240万个细胞的地图,确定了新皮质和条状体中独特的内部神经元分布.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 发展生物学 发展生物学
背景情况:
- 哺乳动物的大脑包括各种结构,具有独特的发育轨迹.
- 了解细胞类型的身份和分布对于破译大脑功能至关重要.
研究的目的:
- 为了研究灵长类脑细胞类型的转录基因特征.
- 确定塑造神经元身份的因素,如发育起源和神经递质信号传递.
- 绘制特定内部神经元群体的空间分布图.
主要方法:
- 单核RNA测序超过240万个细胞,来自18个鱼大脑部位.
- 使用单分子FISH (smFISH) 对GABA活性细胞类型进行定量映射.
- 使用细胞类型特异增强剂和AAV-GFP进行形态重建.
主要成果:
- 成年神经元转录体认同主要受到发育起源的影响,而不是神经递质谱.
- 纹状体和新皮质中的内神经元表现出不同的空间组织原则.
- 高阶皮质区域,如侧面前额皮质,显示出高比例的VIP+神经元.
结论:
- 发育系,局部微环境和功能类是灵长类大脑细胞类型身份和分布的关键决定因素.
- 这项研究提供了大黄蜂大脑的高分辨率转录基因图,为神经元多样性提供了洞察力.
相关概念视频
01:20Anatomy of the Brain: Major Regions
4.7K
The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect...
4.7K
01:30Organization of the Brain
820
The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
820
01:17Cerebellum: Anatomical Regions
1.7K
The cerebellum, also known as the "little brain," is located in the posterior cranial fossa, inferior to the tentorium cerebelli and dorsal to the brainstem. It plays a significant role in motor control, coordination, and proprioception.
Cerebellar Structure
Externally, the cerebellum features a highly convoluted surface with numerous folia (narrow ridges) separated by shallow sulci (grooves). The cerebellum is divided into two hemispheres by a thin median structure known as the vermis. The...
Cerebellar Structure
Externally, the cerebellum features a highly convoluted surface with numerous folia (narrow ridges) separated by shallow sulci (grooves). The cerebellum is divided into two hemispheres by a thin median structure known as the vermis. The...
1.7K