Polymer-lipid microbubbles for biosensing and the formation of porous structures.

Polymer-lipid microbubbles for biosensing and the formation of porous structures.
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DOI:
10.1016/j.jcis.2010.01.042
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发表时间:
2010-04-15
影响因子:
9.9
通讯作者:
Lee, Abraham P.
Lee, Abraham P.
中科院分区:
化学1区
文献类型:
--
作者:
Hettiarachchi, Kanaka;Lee, Abraham P.

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聚合物-脂质微泡(PLB)是由微流控流动聚焦装置产生的,以形成一类新的持久的混合颗粒。开发的特定PLB构建体是具有聚二甲基硅氧烷(PDMS)壳的弹性充气微球,所述壳含有与官能化聚乙二醇(PEG)缀合的磷脂。数字“基于液滴”的微流体技术能够控制颗粒组成、尺寸和多分散性(σ < 10%)。由于可热固化的固化过程,使用PDMS作为壳组分改善了混合颗粒的功能性和稳定性(寿命> 6个月)。通过气芯,它们可作为模板材料用于创建三维多孔结构和表面,无需繁琐的后处理去除步骤。通过添加生物素化的PEG-脂质衍生物,提供靶向能力,我们证明了固定的PDMS-脂质微泡上的荧光IgG抗体,通过生物素亲和素相互作用和芯片上捕获免疫测定。PDMS-脂质组合物提供了几个优点,例如生物相容性和生物降解性,用于未来体内用作多孔工程支架、包装材料或具有细胞靶向能力的递送(即治疗)剂。
Polymer-lipid microbubbles (PLBs) are generated by microfluidic flow-focusing devices to form a new class of long-lasting hybrid particles. The specific PLB construct developed is an elastic gas-filled microsphere with a polydimethylsiloxane (PDMS) shell containing phospholipids conjugated to functionalized polyethyleneglycol (PEG). Digital “droplet-based” microfluidics technology enables control of particle composition, size, and polydispersity (σ < 10%). Use of PDMS as a shell component improves the functionality and stability (lifetime > 6 months) of the hybrid particles due to the thermally maneuverable solidification process. With a gas core, they serve as a template material for creating three-dimensional porous structures and surfaces, requiring no cumbersome post-processing removal steps. By adding biotinylated PEG-lipid derivatives that offer targeting capabilities, we demonstrate the immobilization of fluorescent IgG antibodies on stationary PDMS-lipid microbubbles through biotinavidin interactions and on-chip trapping for immunoassays. A PDMS-lipid composition offers several advantages such as biocompatibility and biodegradability for future in-vivo use as porous engineered scaffolds, packing materials, or delivery (i.e. therapeutic) agents with cell targeting capability.
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