Video Experimental Relacionado
Updated: Dec 4, 2025

09:25
Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
Published on: May 8, 2020
11.1K
El análisis del linaje revela una contribución endodérmica a la hipófisis de los vertebrados
Peter Fabian1, Kuo-Chang Tseng1, Joanna Smeeton1,2
1Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.
Resumen
La glándula pituitaria
Área de la Ciencia:
- Biología del desarrollo
- Biología evolutiva
- Endocrinología
Sus antecedentes:
- Los órganos sensoriales de los vertebrados se desarrollan a partir de los placodos, cruciales para la evolución de la cabeza.
- El placodo más anterior forma el lóbulo endocrino de la pituitaria (adenohipófisis, ADH).
Objetivo del estudio:
- Para investigar los orígenes de la adenohypophysis.
- Explorar posibles contribuciones endodérmicas al desarrollo de la hipófisis.
Principales métodos:
- El rastreo del linaje en el pez cebra.
- Las imágenes en lapso de tiempo.
- Secuenciación de ARN de una sola célula de la pituitaria adulta.
Principales resultados:
- Se ha identificado una contribución endodérmica a la ADH en el pez cebra.
- Los epitélios endodérmicos y ectodérmicos muestran un potencial de generación de tipo celular similar.
- El endodermo puede formar una estructura rudimentaria similar a la ADH sin un aporte ectodérmico significativo.
Conclusiones:
- La hipófisis de los vertebrados probablemente evolucionó a partir de una proto-hipófisis ancestral derivada del endodermo que interactúa con el ectodermo placodal.
- Este estudio revela un doble origen para la glándula pituitaria, que involucra a los tejidos endodérmicos y ectodérmicos.
Videos de Conceptos Relacionados
The Pituitary Gland
9.2K
The pituitary is a small endocrine organ in the sphenoid bone under the hypothalamus. Primarily, the pituitary in adults has two distinct anatomical and functional regions— the anterior and posterior lobes. During human fetal development, a third pituitary gland region called the pars intermedia atrophies and disappears. However, some of its cells migrate and exist adjacent to the anterior pituitary in adults.
9.2K
Gastrulation
64.4K
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
64.4K
Lineage Commitment
3.8K
Commitment is the process whereby stem cells:
3.8K
Determination
20.3K
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
20.3K

