Video Experimental Relacionado
Updated: Feb 13, 2026
14:36
Adult and Embryonic Skeletal Muscle Microexplant Culture and Isolation of Skeletal Muscle Stem Cells
Published on: September 21, 2010
29.4K
La transcriptómica unicelular revela mecanismos de diferenciación del músculo esquelético a través del desarrollo
Yunxiao Sun1, Zhen Li1, Yuchen Jie1
1State Key Laboratory of Animal Biotech Breeding, Breeding and Reproduction of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, College of Animal Science and Technology, Frontiers Science Center for Molecular Design Breeding (MOE), China Agricultural University, Beijing, China.
Communications biology
|February 11, 2026
Resumen
El desarrollo del músculo esquelético del pato revela que las fibras de contracción lenta pueden convertirse en tipos de contracción rápida, un mecanismo conservado en los vertebrados. Este hallazgo ofrece información sobre la adaptación muscular y la medicina regenerativa.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología evolutiva Biología evolutiva.
- Fisiología Muscular Fisiología Muscular
Sus antecedentes:
- La diversidad del tipo de fibra del músculo esquelético es crucial para la locomoción de los vertebrados.
- Los mecanismos de diversificación del tipo de fibra y su conservación evolutiva no se comprenden completamente.
Objetivo del estudio:
- Para crear un atlas transcriptómico de una sola célula del desarrollo del músculo esquelético del pato.
- Investigar las vías de desarrollo de la diversificación del tipo de fibra muscular.
- Para explorar la conservación evolutiva de estos mecanismos en los vertebrados.
Principales métodos:
- Secuenciación integral de ARN unicelular del músculo esquelético del pato durante el desarrollo embrionario.
- Análisis bioinformático para identificar trayectorias celulares y patrones de expresión génica.
- Análisis transcriptómico comparativo con conjuntos de datos de aves y mamíferos.
Principales resultados:
- Identificó una nueva vía de diferenciación donde las fibras musculares de contracción lenta pueden transdiferenciarse en fibras de contracción rápida.
- Este proceso de transdiferenciación está mediado por un subtipo específico, LEF1+(I).
- El programa de conversión de tipo fibra se conserva filogenéticamente en todas las especies de aves y mamíferos.
Conclusiones:
- El estudio proporciona una hoja de ruta detallada de los factores de transcripción involucrados en el desarrollo de la miofibra de los vertebrados.
- Descubrió un mecanismo conservado para la conversión del tipo de fibra muscular, lo que sugiere homología en la adaptación muscular.
- Ofrece información fundamental sobre el patrón del tejido con aplicaciones potenciales en medicina regenerativa y biotecnología.
Videos de Conceptos Relacionados
01:48Classification of Skeletal Muscle Fibers
59.6K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.6K
01:15Overview of Skeletal Muscle
14.8K
Skeletal muscles are composed of a bundle of muscle fibers and are attached to bones through tendons. Each skeletal muscle fiber is a single muscle cell. The sarcolemma, the plasma membrane of a skeletal muscle cell, consists of a lipid bilayer and glycocalyx that supports muscle fibers. The sarcolemma extends into the muscle cells to form tubular structures called transverse or T-tubules. Each side of the T-tubules consists of a membrane-bound structure called the sarcoplasmic reticulum,...
14.8K
01:29Relaxation of Skeletal Muscles
6.0K
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
6.0K
01:28Disorders of the Skeletal Muscle
1.9K
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
1.9K
01:19Naming Skeletal Muscles
4.1K
The naming of the approximately 700 muscles in the human body is based on a set of criteria designed to provide descriptive information about each muscle, making it easier to identify and remember them.
The key factors used in naming muscles include:
The key factors used in naming muscles include:
4.1K
00:55Skeletal Muscle Anatomy
92.9K
Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
92.9K