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Pulsating vesicles

机译:脉动囊泡

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摘要

During her travels through Wonderland, Alice finds several ways of growing and shrinking in size. A polymeric vesicle plays the same trick in response to pH, in a process that might one day be useful for drug delivery.rnMolecules and molecular assemblies that undergo controllable shape changes in response to an external trigger will be crucial to manufacturing nanometre-scale devices. But although stimulus-responsive systems are common in nature, it is not always easy to create synthetic versions, even when using nature for inspiration. This is certainly true of vesicles, a class of cell-mimicking structures that have been investigated intensively for decades. In the Journal of the American Chemical Society, Eisenberg and colleagues' report a polymeric vesicle for which the structure and properties can be controlled - it 'breathes' in response to pH, becoming twice as big in acid solution as it is in basic solution. This reversible size change is accompanied by a permeability change, so that water molecules diffuse more easily through the membrane wall of the vesicle when the structure is highly swollen.
机译:在游历仙境的过程中,爱丽丝发现了几种增大和缩小尺寸的方法。聚合物囊泡对pH的反应也相同,这一过程可能有一天对药物的输送有用。分子和分子组件响应外部触发而经历可控的形状变化,对于制造纳米级设备至关重要。但是,尽管刺激响应系统在自然界中很常见,但即使使用自然界的灵感来创建合成版本也不总是那么容易。对于囊泡来说,这确实是正确的,囊泡是一类已经被深入研究了数十年的细胞模拟结构。 Eisenberg及其同事在《美国化学学会杂志》上报道了一种可控制其结构和性质的聚合物囊泡-它可响应pH值“呼吸”,在酸性溶液中的体积是碱性溶液的两倍。这种可逆的尺寸变化伴随着渗透率的变化,因此当结构高度溶胀时,水分子更容易通过囊泡的膜壁扩散。

著录项

  • 来源
    《Nature》 |2009年第7260期|4547|共2页
  • 作者

    Jan C. M. van Hest;

  • 作者单位

    Department of Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg135, Nijmegen 6525 AJ, the Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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