相关实验视频
Updated: Jan 27, 2026

10:16
Mining Spatial Transcriptomics Datasets using DeepSpaceDB
Published on: September 5, 2025
694
一个基于空间和投影的转录基因地图,展示了对心室下垂体细胞类型的转录基因地图
Yuxi Li1, Trevor C Butler1, Stefano Nardone2
1Department of Neuroscience and Pharmacology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
Cell reports
|January 25, 2026
概括
研究人员使用单细胞测序和空间转录学绘制了对心室下丘脑 (PVH) 神经元亚型的地图. 这本地图集确定了特定的PVH细胞群体,它们调节食欲和交感神经系统活动,这对恒温至关重要.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 副腹下垂体 (PVH) 对于调节食欲,社会行为,自主功能和荷尔蒙分泌至关重要.
- 了解PVH神经元群体的分子身份和空间组织对于破译其复杂的角色至关重要.
- 目前的知识缺乏PVH细胞类型及其特定分子标记物的全面目录,特别是用于中央投射的神经元.
研究的目的:
- 为了创建一个高分辨率的空间转录基因地图的副腹腔下丘脑 (PVH).
- 识别和目录不同的PVH神经元亚型,包括Sim1+和GABAergic群体.
- 绘制PVH神经元的投影图,并将特定细胞群与和同情性外流等功能联系起来.
主要方法:
- 单细胞/核RNA测序被用于编目PVH神经元亚型.
- 多重复合错误强大的光在现场杂交 (MERFISH) 用于这些神经元的空间映射.
- 进行了基于投影的分析,以确定特定PVH神经元群体的目标.
主要成果:
- 一个空间转录基因图谱解析了PVH内部和周围的26个Sim1+和29个GABAergic神经元群.
- 特定的PVH神经元群体被确定,这些神经元群体投射到副手臂区域 (PB) 和脊髓.
- 发现表达Brs3的PB投射PVH神经元调节食物摄入量,激活减少食欲,沉默导致肥胖.
结论:
- 这项研究提供了PVH的全面的空间和基于电路的基因表达图谱.
- 已识别的神经元亚型及其投射目标为调节平衡提供了有价值的见解.
- 该资源有助于进一步研究以PVH为媒介控制食欲,和自主功能.
相关概念视频
Hypothalamic-Pituitary Axis
65.8K
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
65.8K
Fischer Projections
16.4K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
16.4K
Newman Projections
20.7K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
20.7K
Coordinates and Map Projections
602
Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
602
T Cell Types and Functions
2.3K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
2.3K
Classification of Titrimetric Analysis Based on Reaction Types
1.5K
Titrimetric analysis in solution chemistry involves measuring the volume of solutions and is often called volumetric analysis. The standard solution of known concentration in the burette is called the titrant, whereas the solution of unknown concentration in the flask is called the analyte, or titrand. Titrimetric analyses can be classified into four types based on the reactions between the titrant and analyte.
Titrations between an acid and a base lead to neutralization reactions that form...
Titrations between an acid and a base lead to neutralization reactions that form...
1.5K

