Porous-wall hollow glass microspheres as novel potential nanocarriers for biomedical applications.

Porous-wall hollow glass microspheres as novel potential nanocarriers for biomedical applications.
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DOI:
10.1016/j.nano.2009.06.004
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发表时间:
2010-02
影响因子:
5.4
通讯作者:
Dynan, William S.
Dynan, William S.
中科院分区:
医学2区
文献类型:
--
作者:
Li, Shuyi;Nguyen, Lynsa;Xiong, Hairong;Wang, Meiyao;Hu, Tom C. -C.;She, Jin-Xiong;Serkiz, Steven M.;Wicks, George G.;Dynan, William S.

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多孔壁中空玻璃微球(PW-HGM)是一种新型的玻璃材料,由直径为10 ~ 100 μ m的中空中心空腔和1 μ m厚的二氧化硅壳层组成。一个曲折的纳米级通道网络完全穿透了外壳。我们在这里表明,这些通道促进了3-8纳米范围内生物分子的尺寸依赖性吸收和受控释放,包括抗体和修饰的单链抗体可变片段(scFv)。此外,6 nm(70 kDa)葡聚糖可用于门控多孔壁,促进内化的小干扰RNA的受控释放。PW-HGM在小鼠瘤内注射后保持原位,表明其可能用于递送抗癌药物。可携带可溶性治疗剂的中空中心腔与用于控制释放的中孔壁的结合是PW-HGM与其他用于生物医学应用的玻璃材料的独特特征。
Porous-wall hollow glass microspheres (PW-HGMs) are a novel form of glass material consisting of a 10 to 100 micron-diameter hollow central cavity surrounded by a 1 micron-thick silica shell. A tortuous network of nanometer-scale channels completely penetrates the shell. We show here that these channels promote size-dependent uptake and controlled release of biological molecules in the 3–8 nm range, including antibodies and a modified single-chain antibody variable fragment (scFv). In addition, a 6 nm (70 kDa) dextran can be used to gate the porous walls, facilitating controlled release of an internalized small interfering RNA. PW-HGMs remained in place after mouse intratumoral injection, suggesting a possible application for the delivery of anti-cancer drugs. The combination of a hollow central cavity that can carry soluble therapeutic agents with mesoporous walls for controlled release is a unique characteristic that distinguishes PW-HGMs from other glass materials for biomedical applications.
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