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Superelasticidad activa en el epitelio tridimensional de forma controlada

Ernest Latorre^1,2, Sohan Kale², Laura Casares¹

¹Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology (BIST), Barcelona, Spain.

|November 8, 2018

Resumen

Las láminas epiteliales actúan como materiales súper elásticos activos, exhibiendo una meseta tensional única durante el estiramiento extremo. Este comportamiento, impulsado por inestabilidades a nivel celular, permite que los tejidos soporten una deformación significativa.

Área de la Ciencia:

La biofísica
Biología celular
Ciencias de los materiales

Sus antecedentes:

Las láminas epiteliales forman estructuras curvas esenciales en los sistemas biológicos.
Comprender cómo estos tejidos se deforman y mantienen su integridad bajo presión es crucial.

Objetivo del estudio:

Investigar las propiedades mecánicas de las capas epiteliales durante el desarrollo y la deformación.
Para aclarar los mecanismos celulares que subyacen a la superelasticidad de los tejidos.

Principales métodos:

Fabricación de conjuntos de cúpulas epiteliales con geometría controlada.
Medición de la tensión epitelial y la presión luminal.
Modelado teórico de la mecánica de los tejidos.

Principales resultados:

Las láminas epiteliales exhiben una 'plataforma de tensión' sobre grandes cepas de área, que se comportan como materiales superelásticos activos.
Las cepas a nivel celular son altamente heterogéneas, en contraste con la tensión del tejido uniforme.
La dilución de la corteza de actina inducida por el estiramiento y el rescate del filamento intermedio impulsan esta superelasticidad.

Conclusiones:

Las láminas epiteliales muestran superelasticidad activa, un comportamiento mecánico novedoso.
Esta propiedad permite que los tejidos soporten estiramientos extremos mientras mantienen una tensión constante.
Los hallazgos revelan un nuevo mecanismo para la morfogénesis y adaptación de los tejidos.

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