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Biochemistry
基质辅助激光解吸/电离成像质谱分析用硬棕榈籽的制备
基质辅助激光解吸/电离成像质谱分析用硬棕榈籽的制备
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JoVE Journal Biochemistry
Preparation of Hard Palm Seeds for Matrix-Assisted Laser Desorption/Ionization-Imaging Mass Spectrometry Analysis

基质辅助激光解吸/电离成像质谱分析用硬棕榈籽的制备

Full Text
1,509 Views
07:55 min
June 30, 2023

DOI: 10.3791/65650-v

Gabriel R. Martins*1,2, Felipe L. Brum*1,2,3, Davi Marconi Miranda Carvalho da Silva*1,2, Livia C. Barbosa3, Ronaldo Mohana-Borges3, Ayla Sant'Ana da Silva1,2

1Laboratório de Biocatálise (LABIC),Instituto Nacional de Tecnologia, 2Departamento de Bioquímica, Instituto de Química,Universidade Federal do Rio de Janeiro, 3Centro de Espectrometria de Massas de Biomoléculas, Instituto de Biofísica Carlos Chagas Filho,Universidade Federal do Rio de Janeiro

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该协议旨在描述用于MALDI-IMS分析的低含水量硬种子样品切片的详细指南,保持分析物的原始分布和丰度,并提供高质量的信号和空间分辨率。

我们的研究重点是从热带生物多样性中评估植物生物量。为此,对这些材料进行良好的表征非常重要,这样我们才能为它们提供最佳价值并提出最佳目的地。为此,在这项工作中,我们采用MALDI成像质谱分析作为一种表征技术,因为它是一种非常精确的方法,可以为我们提供生物组织的分子特异性成像。

通过这些结果,我们可以大致了解这种植物生物质的主要成分及其定位,这可以指导我们探索该材料的新产品和工艺。然而,要进行非常好的MALDI图像质谱分析,拥有良好的样品制备方法非常重要,这正是我们在这项工作中描述的。技术的进步给成像质谱分析带来了许多挑战。

特别是植物组织,由于其特殊的器官,构成了复杂的挑战。对于这种技术,这种样品制备至关重要,如果样品制备不充分,将无法检测到信号或出现伪影,从而导致结果不准确。这些方案使我们能够制备耐肠道棕榈种子的薄片,作为活种子组织内分子图谱概念的证明。

因此,该技术为这些种子中存在的寡糖提供了宝贵的见解。因此,我们希望该技术对有类似障碍的研究人员有所帮助。这种技术可以帮助研究其他硬种子或任何其他生物材料,这些材料对切成鳍片提出了挑战。

例如,如果一个人正在研究坚硬的种子,该协议可以成为研究种子发育和发芽的工具。

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