Video Experimental Relacionado
Updated: Jun 14, 2026
08:58
Silicon Nanowires and Optical Stimulation for Investigations of Intra- and Intercellular Electrical Coupling
Published on: January 28, 2021
Lo que la célula "ve" en la biociencia
Dorota Walczyk1, Francesca Baldelli Bombelli, Marco P Monopoli
1Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
Journal of the American Chemical Society
|April 2, 2010
Resumen
Las nanopartículas que interactúan con los sistemas biológicos están cubiertas por "coronas" biomoleculares. Estas capas de proteínas, en lugar de la nanopartícula desnuda, son lo que las células detectan, persistiendo el tiempo suficiente para influir en las interacciones biológicas.
Área de la Ciencia:
- La nanomedicina es la nanomedicina.
- Ciencia de los Biomateriales Ciencia de los Biomateriales.
- Biología celular Biología celular.
Sus antecedentes:
- Las nanopartículas interactúan con los sistemas biológicos a través de una capa de biomoléculas adsorbidas, denominada "corona".
- La composición y la estabilidad de esta corona influyen significativamente en la identidad e interacciones biológicas de las nanopartículas.
- Comprender la dinámica de la corona es crucial para predecir el comportamiento de las nanopartículas in vivo.
Objetivo del estudio:
- Investigar la estabilidad y las características de las coronas biomoleculares formadas en nanopartículas en medios biológicos.
- Para determinar si estas coronas persisten el tiempo suficiente como para ser el principal determinante de la interacción celular.
- Evaluar la viabilidad de aislar y estudiar estas coronas de forma independiente.
Principales métodos:
- Análisis con resolución de tiempo de la formación y estabilidad de la corona biomolecular.
- Estudios in situ y aislados de complejos de nanopartículas-biomoleculas.
- Utilizó múltiples metodologías para caracterizar la estructura de la corona y su vida útil.
Principales resultados:
- Las coronas biomoleculares, particularmente las derivadas del plasma sanguíneo, son suficientemente estables y de larga vida.
- Estas coronas estables pueden ser físicamente aisladas sin alteración estructural.
- La corona, no la superficie desnuda de las nanopartículas, es probablemente reconocida por las células biológicas.
Conclusiones:
- La corona biomolecular dicta las interacciones celulares con las nanopartículas, no las propiedades intrínsecas del material.
- Los métodos actuales de clasificación de nanomateriales basados en propiedades desnudas pueden ser insuficientes.
- Las metodologías reportadas ofrecen una vía para comprender y predecir mejor los impactos biológicos de los nanomateriales para la seguridad y la ciencia fundamental.
Videos de Conceptos Relacionados
01:16Non-equilibrium in the Cell
An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
02:03What is Cell Signaling?
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
02:03What is Cell Signaling?
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate to respond to the environment.
01:04What is the Cell Cycle?
The cell cycle refers to the sequence of events occurring throughout a typical cell’s life. In eukaryotic cells, the somatic cell cycle has two stages: interphase and the mitotic phase. During interphase, the cell grows, performs its basic metabolic functions, copies its DNA, and prepares for mitotic cell division. Then, during mitosis and cytokinesis, the cell divides its nuclear and cytoplasmic materials, respectively. This generates two daughter cells that are identical to the original...
01:23Overview of Cell Signaling
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
01:13Cell-matrix's Response to Mechanical Forces
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...