Video Experimental Relacionado
Updated: May 23, 2026
08:25
Imaging and Analysis of Tissue Orientation and Growth Dynamics in the Developing Drosophila Epithelia During Pupal Stages
Published on: June 2, 2020
Control mecánico de la morfogénesis por la vía de polaridad de las células planas de grasa / Dachsous / Cuatro
Floris Bosveld1, Isabelle Bonnet, Boris Guirao
1Polarity, Division and Morphogenesis Team, Institut Curie, CNRS UMR 3215, INSERM U934, 26 Rue d'Ulm, 75248 Paris Cedex 05, France.
Science (New York, N.Y.)
|April 14, 2012
Resumen
La vía de polaridad de las células planas de cuatro articulaciones orienta la forma del tejido mediante la polarización de proteínas como Dachsous y Dachs. Esto conduce a reorganizaciones celulares orientadas y contracción de tejidos durante el desarrollo de la Drosophila.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología celular Biología celular.
- La biofísica es la biofísica.
Sus antecedentes:
- Las vías de polaridad celular plana (PCP) son cruciales para coordinar el comportamiento celular colectivo y dar forma a los tejidos durante el desarrollo animal.
- Comprender los mecanismos moleculares por los cuales las vías de PCP regulan la mecánica celular y la morfogénesis de los tejidos es esencial.
Objetivo del estudio:
- Para caracterizar el papel de la vía de PCP de grasa/descendiente/cuatro articulaciones en la morfogénesis del epitelio del tórax dorsal de la Drosophila.
- Para dilucidar cómo esta vía PCP controla la forma del tejido a través del comportamiento celular coordinado y la modulación de propiedades mecánicas.
Principales métodos:
- Imágenes a escala múltiple de la morfogénesis del epitelio en Drosophila.
- Análisis cuantitativos de imágenes combinados con modelado físico.
- Caracterización de la polarización de las proteínas (Dachsous, Dachs) y la anisotropía de la tensión de unión.
Principales resultados:
- El Dachsous proto-cadherin está polarizado dentro de su dominio de gradiente de expresión en todo el tejido.
- Dachsous polariza la miosina Dachs, induciendo la anisotropía en la tensión de la unión.
- La anisotropía de tensión dicta patrones de contracción de tejidos locales, principalmente a través de reorganizaciones celulares orientadas.
Conclusiones:
- La vía de PCP de grasa / Dachsous / Cuatro articulaciones es un regulador clave de la morfogénesis del tórax dorsal de Drosophila.
- La polarización plana del tejido coordina los cambios locales en las propiedades mecánicas celulares para controlar la configuración del tejido.
- Este estudio establece un vínculo entre la señalización de PCP, la mecánica celular y la morfogénesis tisular.
Videos de Conceptos Relacionados
02:19Morphogenesis
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
01:31Mechanism of Lamellipodia Formation
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
01:41Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
02:13Determining the Plane of Cell Division
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
01:21Cell Polarization by Rho Proteins
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
01:39Mechanism of Filopodia Formation
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...