High‐throughput seminal fluid identification by automated immunoaffinity mass spectrometry

Affinity selection mass spectrometry (ASMS) has emerged as a powerful high-throughput screening tool used in drug discovery to identify novel ligands against therapeutic targets. This report describes the first high-throughput screen using a novel self-assembled monolayer desorption ionization (SAMDI)–ASMS methodology to reveal ligands for the human rhinovirus 3C (HRV3C) protease. The approach combines self-assembled monolayers of alkanethiolates on gold with matrix-assisted laser desorption ionization time-of-flight (MALDI TOF) mass spectrometry (MS), a technique termed SAMDI-ASMS. The primary screen of more than 100,000 compounds in pools of 8 compounds per well was completed in less than 8 h, and informs on the binding potential and selectivity of each compound. Initial hits were confirmed in follow-up SAMDI-ASMS experiments in single-concentration and dose–response curves. The ligands identified by SAMDI-ASMS were further validated using differential scanning fluorimetry (DSF) and in functional protease assays against HRV3C and the related SARS-CoV-2 3CLpro enzyme. SAMDI-ASMS offers key benefits for drug discovery over traditional ASMS approaches, including the high-throughput workflow and readout, minimizing compound misbehavior by using smaller compound pools, and up to a 50-fold reduction in reagent consumption. The flexibility of this novel technology opens avenues for high-throughput ASMS assays of any target, thereby accelerating drug discovery for diverse diseases.

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High-Throughput Salivary Metabolite Profiling on an Ultralow Noise Tip-Enhanced Laser Desorption Ionization Mass Spectrometry Platform for Noninvasive Diagnosis of Early Lung Cancer

Journal of Proteome Research ◽

10.1021/acs.jproteome.1c00310 ◽

2021 ◽

Author(s):

Xinrong Jiang ◽

Xiaoming Chen ◽

Zhao Chen ◽

Jiekai Yu ◽

Haizhou Lou ◽

...

Keyword(s):

Mass Spectrometry ◽

Lung Cancer ◽

High Throughput ◽

Metabolite Profiling ◽

Laser Desorption ◽

Ionization Mass Spectrometry ◽

Ionization Mass ◽

Noninvasive Diagnosis ◽

Laser Desorption Ionization ◽

Desorption Ionization

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Evaluation of ambient mass spectrometry tools for assessing inherent postharvest pepper quality

Horticulture Research ◽

10.1038/s41438-021-00596-x ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Tyler J. Mason ◽

Harmonie M. Bettenhausen ◽

Jacqueline M. Chaparro ◽

Mark E. Uchanski ◽

Jessica E. Prenni

Keyword(s):

Mass Spectrometry ◽

High Throughput ◽

High Throughput Screening ◽

Direct Analysis ◽

Quality Characteristics ◽

Ambient Mass Spectrometry ◽

Postharvest Quality ◽

Ionization Mass ◽

Ambient Conditions ◽

Assess Quality

AbstractHorticulturists are interested in evaluating how cultivar, environment, or production system inputs can affect postharvest quality. Ambient mass spectrometry approaches enable analysis of minimally processed samples under ambient conditions and offer an attractive high-throughput alternative for assessing quality characteristics in plant products. Here, we evaluate direct analysis in real time (DART-MS) mass spectrometry and rapid evaporative ionization-mass spectrometry (REIMS) to assess quality characteristics in various pepper (Capsicum annuum L.) cultivars. DART-MS exhibited the ability to discriminate between pod colors and pungency based on chemical fingerprints, while REIMS could distinguish pepper market class (e.g., bell, lunchbox, and popper). Furthermore, DART-MS analysis resulted in the putative detection of important bioactive compounds in human diet such as vitamin C, p-coumaric acid, and capsaicin. The results of this study demonstrate the potential for these approaches as accessible and reliable tools for high throughput screening of pepper quality.

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