Home-Built Spinning Apparatus for Drying Agarose-Based Imaging Mass Spectrometry Samples.

Home-Built Spinning Apparatus for Drying Agarose-Based Imaging Mass Spectrometry Samples.
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DOI:
10.1021/jasms.2c00044
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发表时间:
2022-07-06
影响因子:
3.2
通讯作者:
Sanchez, Laura M.
Sanchez, Laura M.
中科院分区:
化学3区
文献类型:
--
作者:
Lusk, Hannah J.;Levy, Sarah E.;Bergsten, Tova M.;Burdette, Joanna E.;Sanchez, Laura M.

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基质辅助激光解吸/电离(MALDI)成像质谱仪(IMS)是绘制生物样品中分子空间分布的一种有用的技术。样品制备是MALDI-IMS的关键;样品必须是扁平的、干燥的,并在分析前与基质共结晶。琼脂糖基样品可能很难持续制备,因为它们容易受到环境变化的影响,这可能会导致样品表面不一致的干燥和起皱。微小的高度差异可能会导致目标分析物的低电离,或者在成像数据中引入伪影,具体取决于用于分析的仪器。为了克服这些差异,建造了一台自制的机器人旋转器,并将其应用于琼脂糖基样品。这种机器人旋转器价格低廉,易于组装;当应用于琼脂糖基样品时,加快了干燥过程,减少了皱纹,提高了产生的IMS数据的整体质量。
Matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) is a useful technique for mapping the spatial distribution of molecules across biological samples. Sample preparation is crucial for MALDI-IMS; samples must be flat, dry, and co-crystallized with a matrix prior to analysis. Agarose-based samples can be difficult to consistently prepare as they are susceptible to environmental changes, which can lead to inconsistent drying and wrinkling on the sample surface. Small height differences may cause low ionization of target analytes, or introduce artifacts in imaging data depending on the instrument used for analysis. To overcome the variations, a home-built robotic spinner was constructed and applied to agarose-based samples. This robotic-spinner is inexpensive, easy to assemble; and when applied to agarose-based samples, accelerated the drying process and reduced wrinkles, improving the overall quality of the resulting IMS data.
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