Rapid and Non-Targeted Qualitative and Quantitative Detection of miRNA in Complex Biological Samples Using Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry with a 3-Aminoquinoline and 2′,4′,6′-Trihydroxyacetophenone Ionic Liquid Matrix
Shiwen Zhou, Jiancong Liao, Kailin Jiang, Huiwen Wang, Yaqin Liu, Hangming Xiong, Ping Wang, Yuanjiang Pan* and Hongru Feng*,
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引用次数: 0
Abstract
A novel ionic liquid MALDI matrix, 3-aminoquinoline/2′,4′,6′-trihydroxyacetophenone monohydrate (3-AQ/THAP), was developed for the rapid qualitative and quantitative detection of miRNA from biological samples. Compared to the traditional matrix 2,5-dihydroxybenzoic acid (DHB) and previously reported oligonucleotide-specific matrices, such as 3-aminopicolinic acid (3-APA), 3-hydroxypicolinic acid (3-HPA), and 6-aza-2-thiothymine (ATT), the 3-AQ/THAP matrix offers several advantages. It produces fewer alkali metal adduct peaks, exhibits higher sensitivity, and ensures better spot-to-spot repeatability. The 3-AQ/THAP matrix provides broader mass coverage and can effectively detect oligonucleotides ranging from 3-mer to 50-mer while delivering single-base resolution and sequence information. Additionally, it significantly reduces the “sweet spot” effect with an RSD of less than 7% over 36 single-spot analyses. For oligonucleotides ranging from 16-mer to 26-mer, the linear range extends from 0.4 μM to 40 μM per spot, with an R2 greater than 0.988. Finally, miRNA in human plasma, fetal equine serum, and fetal bovine serum was successfully identified both qualitatively and quantitatively using the 3-AQ/THAP matrix. This matrix demonstrated excellent practicability for the detection of multiple miRNAs in complex biological samples.
期刊介绍:
The Journal of the American Society for Mass Spectrometry presents research papers covering all aspects of mass spectrometry, incorporating coverage of fields of scientific inquiry in which mass spectrometry can play a role.
Comprehensive in scope, the journal publishes papers on both fundamentals and applications of mass spectrometry. Fundamental subjects include instrumentation principles, design, and demonstration, structures and chemical properties of gas-phase ions, studies of thermodynamic properties, ion spectroscopy, chemical kinetics, mechanisms of ionization, theories of ion fragmentation, cluster ions, and potential energy surfaces. In addition to full papers, the journal offers Communications, Application Notes, and Accounts and Perspectives