Video Experimental Relacionado
Updated: May 7, 2026
12:59
Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
Published on: February 28, 2021
3.6K
Un atlas multi-ómico del desarrollo del esqueleto embrionario humano
Ken To1,2, Lijiang Fei1, J Patrick Pett1
1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK.
Nature
|November 20, 2024
Resumen
Este estudio mapea el desarrollo esquelético humano utilizando perfiles multi-ómicos, revelando redes reguladoras para la formación ósea y articular y posibles nuevos orígenes celulares.
Área de la Ciencia:
- Biología del desarrollo
- La genómica
- La epigenética
Sus antecedentes:
- La formación embrionaria humana de huesos y articulaciones se basa en la diferenciación de las células progenitoras.
- Los estados celulares precisos, los factores epigenéticos y los mecanismos regulatorios que rigen este compromiso de linaje no se comprenden completamente.
Objetivo del estudio:
- Crear un atlas multi-ómico del desarrollo del esqueleto embrionario humano (5-11 semanas después de la concepción).
- Caracterizar las trayectorias osteoprogenitoras y las redes reguladoras en la osificación de las extremidades y el cráneo.
- Investigar la zonificación progenitor, los orígenes celulares no canónicos y los vínculos genéticos con las enfermedades esqueléticas.
Principales métodos:
- Perfil transcripcional y epigenético emparejado de ~ 336,000 gotas de núcleo único.
- Transcriptómica espacial y secuenciación in situ (utilizando la herramienta ISS-Patcher).
- Modelado combinado de datos multi-ómicos, análisis de trayectoria y simulaciones in silico.
Principales resultados:
- Atlas detallado del desarrollo de las articulaciones y del cráneo en el embrión humano.
- Caracterización de distintas trayectorias osteoprogenitoras y redes reguladoras para la osificación intramembranosa y endocondral.
- Identificación de los mecanismos de zonificación de los progenitores y predicción de las células de Schwann como origen potencial de los condrocitos.
- Desarrollo de la herramienta SNP2Cell que vincula las redes reguladoras con los rasgos poligénicos (por ejemplo, la osteoartritis).
- El modelado en silico de la craneosinostosis monogénica implica estados celulares y mecanismos específicos de la enfermedad.
Conclusiones:
- Este trabajo proporciona un atlas regulatorio dinámico de la maduración del esqueleto humano.
- Avanza en la comprensión fundamental de la determinación del destino celular en el desarrollo esquelético.
- Ofrece información sobre los mecanismos subyacentes a las enfermedades esqueléticas como la osteoartritis y la craneosinostosis.
Videos de Conceptos Relacionados
01:55Bone Structure
Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
01:27Growth of Cartilage and Bone Tissue
Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
01:23Functions of Life
Human life is characterized by a variety of functions that are essential for survival and well-being. These functions include metabolism, movement, development, growth and reproduction.
Metabolism
The basic function of an organism is to consume energy and molecules in foods, convert some of it into fuel for movement, sustain body functions, and build and maintain body structures. There are two types of reactions that accomplish this: anabolism and catabolism.
Anabolism is the process whereby...
Metabolism
The basic function of an organism is to consume energy and molecules in foods, convert some of it into fuel for movement, sustain body functions, and build and maintain body structures. There are two types of reactions that accomplish this: anabolism and catabolism.
Anabolism is the process whereby...
01:17Gross Anatomy of Bone
The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...
01:29Bone Formation by Intramembranous Ossification
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
01:24Bone Formation by Endochondral Ossification
Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...