Dynamics of Hydrogel-Assisted Giant Unilamellar Vesicle Formation from Unsaturated Lipid Systems.

Dynamics of Hydrogel-Assisted Giant Unilamellar Vesicle Formation from Unsaturated Lipid Systems.
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水凝胶辅助不饱和脂质系统巨型单层囊泡形成的动力学。

DOI:
10.1021/acs.langmuir.6b01889
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发表时间:
2016
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Malmstadt,Noah
Malmstadt,Noah
中科院分区:
--
文献类型:
--
作者:
Peruzzi,Justin;Gutierrez,MGertrude;Mansfield,Kylee;Malmstadt,Noah

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虽然目前的研究集中在观察生物物理特性和现象的巨型单层囊泡(GUV),鲜为人知的是控制GUV形成的制造参数。使用不同的脂质和再水化缓冲液,我们直接观察不同的动态水凝胶辅助GUV形成通过荧光显微镜。我们观察了缓冲液离子强度,渗透压,琼脂糖密度和pH值对使用中性和带电脂质的GUV形成的影响。我们发现,增加再水化缓冲液的离子强度与囊泡的大小和GUV形成率的增加。增加缓冲液的酸度增加了GUV的形成速度,而更碱性的环境减慢了速度。对于含有500 mM蔗糖的缓冲液,GUV形成被整体抑制,仅形成小管。GUV形成动力学的观察阐明了电荷,离子强度,pH值和渗透压的参数效应,证明了这种仿生平台的多功能性。
While current research is centered on observing biophysical properties and phenomena in giant unilamellar vesicles (GUVs), little is known about fabrication parameters that control GUV formation. Using different lipids and rehydration buffers, we directly observe varying dynamics of hydrogel-assisted GUV formation via fluorescence microscopy. We observe the effects of buffer ionic strength, osmolarity, agarose density, and pH on the formation of GUVs using neutral and charged lipids. We find that increasing rehydration buffer ionic strength correlates with increased vesicle size and rate of GUV formation. Increasing buffer acidity increased the rate of GUV formation, while more basic environments slowed the rate. For buffers containing 500 mM sucrose, GUV formation was overall inhibited and only tubules formed. Observations of GUV formation dynamics elucidate parametric effects of charge, ionic strength, pH, and osmolarity, demonstrating the versatility of this biomimetic platform.
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