La polarización epitelial por el complejo de polaridad celular plana es exclusivamente no celular autónoma
Lena P Basta1, Bradley W Joyce1, Eszter Posfai1
1Department of Molecular Biology, Princeton University, Princeton, NJ 08540, USA.
Resumen
La polarización celular requiere contacto célula-célula para la segregación del complejo de polaridad celular plana (PCP). La unión intercelular de los complejos de PCP inicia la asimetría, no las interacciones celulares autónomas.
Área de la Ciencia:
- Biología celular
- Biología del desarrollo
- Polaridad del tejido
Sus antecedentes:
- La polarización celular colectiva a lo largo de un plano de tejido se basa en complejos de polaridad celular plana asimétrica (PCP) que forman contactos intercelulares.
- La necesidad de contacto célula-célula para la segregación asimétrica del complejo PCP sigue sin estar clara.
- Se desconoce si las interacciones celulares autónomas son suficientes para la polarización.
Objetivo del estudio:
- Investigar si la segregación asimétrica de complejos de polaridad celular plana (PCP) requiere contacto célula-célula.
- Para determinar si las interacciones antagónicas celulares son suficientes para la polarización.
Principales métodos:
- Generación de quimeras de ratón con células PCP-reportadoras duales y células sin etiquetar que no pueden formar puentes PCP.
- Observación del comportamiento de la proteína PCP en ausencia de interacciones intercelulares.
- Análisis de la clasificación de los componentes PCP en las interfaces célula-célula.
Principales resultados:
- Las proteínas de polaridad celular plana (PCP) no pudieron polarizarse de manera celular autónoma sin interacciones intercelulares.
- Los contactos mediados por PCP en las interfaces de una sola célula fueron suficientes para segregar los componentes de PCP a lados opuestos de la unión.
- Esta clasificación se produjo independientemente de la orientación de la unión.
Conclusiones:
- La unión intercelular de los complejos de polaridad celular plana (PCP) es esencial para iniciar la asimetría.
- El contacto celular, no las interacciones celulares autónomas, es el paso crítico para la segregación y la polarización del complejo PCP.
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