Molecular Surveillance of Viral Processes Using Silicon Nitride Membranes

被引:3
作者
Gilmore, Brian L. [1 ]
Tanner, Justin R. [1 ]
McKell, Allison O. [1 ]
Boudreaux, Crystal E. [1 ]
Dukes, Madeline J. [2 ]
McDonald, Sarah M. [1 ]
Kelly, Deborah F. [1 ]
机构
[1] Virginia Tech, Caril Res Inst, Roanoke, VA 24016 USA
[2] Protochips Inc, Raleigh, NC 27606 USA
来源
MICROMACHINES | 2013年 / 4卷 / 01期
关键词
silicon nitride; microchips; rotavirus; RNA; electron microscopy; TRANSMISSION ELECTRON-MICROSCOPY; CRYOELECTRON MICROSCOPY; CELL; CRYOMICROSCOPY; CAPTURE; DEVICES; EM;
D O I
10.3390/mi4010090
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Here we present new applications for silicon nitride (SiN) membranes to evaluate biological processes. We determined that 50-nanometer thin films of SiN produced from silicon wafers were sufficiently durable to bind active rotavirus assemblies. A direct comparison of SiN microchips with conventional carbon support films indicated that SiN performs equivalent to the traditional substrate to prepare samples for Electron Microscopy (EM) imaging. Likewise, SiN films coated with Ni-NTA affinity layers concentrated rotavirus particles similarly to affinity-coated carbon films. However, affinity-coated SiN membranes outperformed glow-discharged conventional carbon films 5-fold as indicated by the number of viral particles quantified in EM images. In addition, we were able to recapitulate viral uncoating and transcription mechanisms directed onto the microchip surfaces. EM images of these processes revealed the production of RNA transcripts emerging from active rotavirus complexes. These results were confirmed by the functional incorporation of radiolabeled nucleotides into the nascent RNA transcripts. Collectively, we demonstrate new uses for SiN membranes to perform molecular surveillance on life processes in real-time.
引用
收藏
页码:90 / 102
页数:13
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