Video Experimental Relacionado
Updated: Jan 30, 2026

07:48
Working with Human Tissues for Translational Cancer Research
Published on: November 26, 2015
10.4K
La curvatura del tejido y el desequilibrio de la tensión mecánica apicobasal instruyen la morfogénesis del cáncer
Hendrik A Messal1, Silvanus Alt2,3, Rute M M Ferreira1,4
1Adult Stem Cell Laboratory, The Francis Crick Institute, London, UK.
Nature
|February 1, 2019
Resumen
La forma del tumor en los órganos tubulares depende de cómo las células cancerosas cambian su citoesqueleto y el tamaño del tubo original. Este descubrimiento ayuda a entender el crecimiento del cáncer epitelial en órganos como el páncreas.
Área de la Ciencia:
- La biofísica
- Biología del cáncer
- Desarrollo Organoide
Sus antecedentes:
- Los epitélios tubulares forman órganos y son lugares frecuentes de cáncer.
- La tumorigénesis implica una sobreproliferación celular y una arquitectura de tejido alterada.
- Los factores biofísicos que gobiernan las formas anormales del tumor siguen sin estar claros.
Objetivo del estudio:
- Investigar los parámetros biofísicos que determinan la morfología del tumor epitelial.
- Para analizar los cambios morfológicos durante el inicio del cáncer en los conductos pancreáticos.
- Comprender la interacción entre la mecánica celular y la geometría de los tejidos en la tumorigénesis.
Principales métodos:
- Desarrolló una técnica de imagen de órganos enteros en 3D para el análisis de tejidos de resolución de una sola célula.
- Se estudió la transformación oncogénica en los conductos pancreáticos de ratones.
- Utilizó simulaciones de modelos de vértices 3D y la teoría del continuo de la mecánica epitelial.
Principales resultados:
- La transformación oncogénica indujo el crecimiento neoplásico exótico y endofítico.
- Pérdida del gradiente de actividad de la miosina apical-basal observada en las células transformadas.
- El diámetro del epitelio de la fuente dicta la morfología del tumor: los conductos pequeños producen crecimiento exótico, los conductos grandes producen crecimiento endofítico.
- Identificó el desequilibrio de tensión y la curvatura del tejido como determinantes clave.
Conclusiones:
- La morfología del tumor epitelial se rige por los cambios citoesqueléticos en las células transformadas y la geometría tubular original.
- Los hallazgos son consistentes en el epitelio tubular pancreático, hepático y pulmonar.
- Esta investigación proporciona conocimientos fundamentales sobre la tumorigénesis epitelial.
Videos de Conceptos Relacionados
Degree of Curvature and Radius of Curvature
482
The degree of curvature and the radius of curvature are fundamental concepts in determining the sharpness or smoothness of a curve. The degree of curvature is a measure of how steeply a curve bends and can be determined using the chord basis or the arc basis. In the chord basis method, the degree of curvature is defined as the central angle subtended by a chord of 30.48 meters, helping in the calculation of the radius of the curve. The arc basis method defines the degree of...
482
Morphogenesis
30.4K
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.
30.4K
Homeostatic Imbalance
33.6K
Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
However, sometimes these feedback loops fail,...
However, sometimes these feedback loops fail,...
33.6K
Tension
13.8K
Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" comes from Latin, meaning "to stretch". Not coincidentally, the flexible cords that carry muscle forces to other parts of the body are called tendons. Any flexible connector, such as a string, rope, chain, wire, or cable, can exert pull only parallel to its length; so, a force carried by a flexible connector is a tension with a...
13.8K
Adaptive Mechanisms in Cancer Cells
7.1K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
7.1K
Mechanisms of Retrovirus-induced Cancers
7.0K
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
7.0K

