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相关概念视频

Organization of the Nervous System01:13

Organization of the Nervous System

The nervous system is one of the most complex systems in our body. It is organized into two main divisions: the central nervous system (CNS) and the peripheral nervous system (PNS).
The CNS, comprising the brain and spinal cord, houses billions of neurons. The brain is housed in the skull, while the spinal cord is linked to the brain through the foramen magnum of the occipital bone and is surrounded by the protective structure of the vertebral column. It is responsible for processing various...
Anatomy of the Brain: Major Regions01:20

Anatomy of the Brain: Major Regions

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 various areas...
Cerebrum: Anatomical Overview II01:11

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...
Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Organization of the Brain01:30

Organization of the Brain

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...

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相关实验视频

Updated: Jun 15, 2026

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
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Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM

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定义的人类三系血统大脑微组织.

Takeshi Uenaka1,2, Sascha Jung3, Ishan Kumar1,2

  • 1Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.

bioRxiv : the preprint server for biology
|August 13, 2025
PubMed
概括
此摘要是机器生成的。

人类iPSC衍生的微质细胞与神经元和星体细胞在新型大脑微组织中共同培养. 这些微组织促进恒常的微细胞表型,并模拟神经退行性疾病.

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科学领域:

  • 神经科学是一个神经科学.
  • 干细胞生物学 干细胞生物学
  • 免疫学 免疫学 免疫学

背景情况:

  • 微质细胞是中枢神经系统免疫细胞,对大脑健康和疾病至关重要.
  • 人类和小鼠的微质细胞有很大的差异,需要人类特异的模型.
  • 现有的模型很难复制人类微质体的体内环境和相互作用.

研究的目的:

  • 开发一种基于人类iPSC的强大的脑微组织模型,用于研究微质神经与星细胞的相互作用.
  • 建立一个系统,支持静态微质表型在体外.
  • 研究细胞细胞通信网络和模型神经退行过程.

主要方法:

  • 在2D和3D微组织中共同培养人类诱导多能干细胞 (iPSC) 衍生的神经元,星体和微质细胞.
  • 在完全定义的介质中培养,没有外源性细胞因子.
  • 通过scRNA-seq和snRNA-seq分析细胞形态,功能,生存,成熟和基因表达.
  • 对α-synuclein播种和聚合的建模.

主要成果:

  • 开发出稳定,自给自足的脑微组织,具有特征性的细胞形态和功能.
  • 共同培养的微质细胞表现出恒常的表型,与外源性细胞因子不同.
  • 星细胞,而不是神经元,足以维持微质的生存和成熟,M-CSF是必不可少的.
  • 通过多原子分析确定了互惠的细胞通信网络.
  • 在微组织中成功地回顾了α-synuclein病理.

结论:

  • 人类iPSC衍生的大脑微组织为研究微质在恒常性和疾病背景下提供了一个强大的平台.
  • 天星细胞在支持微质细胞的发育和功能方面发挥着至关重要的作用.
  • 这些微组织作为神经退行性疾病研究的有价值的人类细胞模型.