Video Experimental Relacionado
Updated: Jun 22, 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
La coordinación del crecimiento y la división celular en el ala de la Drosophila
T P Neufeld1, A F de la Cruz, L A Johnston
1Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA.
Cell
|July 10, 1998
Resumen
La alteración de las tasas de división celular en las alas de Drosophila no afectó el crecimiento de los tejidos. En cambio, los cambios en la división celular fueron compensados por cambios en el tamaño celular, lo que indica que el control del ciclo celular está separado del crecimiento.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Regulación del ciclo celular Regulación del ciclo celular
- Drosophila melanogaster investigación de la búsqueda de la búsqueda de la búsqueda de la búsqueda
Sus antecedentes:
- La división celular y el crecimiento están típicamente coordinados en la mayoría de los tejidos.
- Comprender los mecanismos que vinculan el control del ciclo celular y el crecimiento de los tejidos es crucial.
Objetivo del estudio:
- Para investigar la relación entre las tasas de división celular y el crecimiento del tejido en las alas de Drosophila.
- Para determinar si la manipulación de la proliferación celular afecta el tamaño total del tejido.
Principales métodos:
- Tasas de división celular alteradas en clones de alas y compartimentos de Drosophila utilizando manipulaciones genéticas.
- Se midió el impacto de la proliferación alterada en el número de células, el tamaño celular y el crecimiento general del tejido.
Principales resultados:
- La sobreproducción de dE2F aceleró la proliferación celular al aumentar la expresión de la ciclina E y la cadena.
- La pérdida de dE2F o el aumento de los niveles de RBF retrasó la proliferación celular.
- Los cambios en las tasas de división celular (4 a 5 veces) tuvieron un impacto mínimo en el tamaño del tejido, pero alteraron significativamente el tamaño de la célula.
Conclusiones:
- dE2F y RBF regulan principalmente el control del ciclo celular, no el crecimiento de los tejidos.
- El ciclo celular acelerado por sí solo es insuficiente para estimular el crecimiento de los tejidos.
- La actividad de dE2F se puede modular para coordinar la división celular con el crecimiento.
Videos de Conceptos Relacionados
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
02:15The Contractile Ring
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
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...
01:59The Phragmoplast
Cell division is essential for organismal growth and development. In animal cells, the central spindle and its associated proteins form the midbody, a structure that has an essential role in cytokinesis. In plants, the central spindle, along with the microtubules, actin, and other cell components, matures into the phragmoplast, which is necessary for cytokinesis. Unlike the stationary midbody, the phragmoplast expands centrifugally, eventually leading to the formation of the new cell wall.
The...
The...
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
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...