|
1
|
Huang Y, Zhang Q, Liu Y, Jiang B, Xie J, Gong T, Jia B, Liu X, Yao J, Cao W, Shen H, Yang P. Aperture-controllable nano-electrospray emitter and its application in cardiac proteome analysis. Talanta 2020; 207:120340. [PMID: 31594582 DOI: 10.1016/j.talanta.2019.120340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 08/31/2019] [Accepted: 09/07/2019] [Indexed: 12/01/2022]
Abstract
The emitter clogging is the most common hardware failure of nano-electrospray ionization, to improve the durability and electrospray stability of fused silica emitters, we demonstrate a means of fabricating nano-electrospray emitters with controllable aperture size and gradually-narrowed channel on the tip. We simulated the fluid morphologies in the emitter channels by computational fluid dynamics and found more stable flow on aperture-controllable nano-electrospray emitter. Besides, we found the unstable flow sections of commercial emitters match the actual clogging sections very well, indicating the main cause of emitter clogging is unstable flow. We further tested the emitters by nano-LC-MS based proteome analysis. Compared with the commercial emitter, aperture-controllable nano-electrospray emitters promoted the total ion chromatogram intensity by 25%, the number of identified proteins by 6.58%, and the number of identified peptides by 7.87%. In total, 989 proteins were identified from 1 μg of extracted mouse cardiac proteins. After the optimization by using mouse samples, we analyzed clinical auricular dextral tissues from patients undergoing cardiac surgery and found 16 proteins related to atrial fibrillation. Overall, aperture-controllable nano-electrospray emitter exhibits better sensitivity and reproducibility in the application of nano-LC-MS cardiac proteome analysis.
Collapse
Affiliation(s)
- Yuanyu Huang
- Department of Chemistry and Zhongshan Hospital, Fudan University, Shanghai, 200433, China
| | - Quanqing Zhang
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Yingchao Liu
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Biyun Jiang
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Juanjuan Xie
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Tianqi Gong
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Bin Jia
- Department of Chemistry and Zhongshan Hospital, Fudan University, Shanghai, 200433, China
| | - Xiaohui Liu
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Jun Yao
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Weiqian Cao
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China; The Fifth People's Hospital of Shanghai, NHC Key Laboratory of Glycoconjugates Research, Fudan University, Shanghai, 201100, China
| | - Huali Shen
- Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China.
| | - Pengyuan Yang
- Department of Chemistry and Zhongshan Hospital, Fudan University, Shanghai, 200433, China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| |
Collapse
|
|
2
|
Abstract
Live single-cell mass spectrometry (LSC-MS) allows for the detection of hundreds to thousands of metabolite peaks acquired from a single plant cell within a few minutes. Plant cells are first observed under a stereomicroscope, a cell of interest is chosen, and then sampled using a metal-coated glass microcapillary for subsequent analysis. A few microliters of ionization solvent is then added to the rear end of the capillary followed by the introduction of the capillary's content directly into the mass spectrometer. High voltage is applied between the capillary and the mass spectrometer inlet to induce nanospray ionization. Metabolite structural confirmation is performed using tandem mass spectrometry analysis (MS/MS) and fragments are matched with MS/MS databases to predict metabolic pathways. This method enables swift and direct molecular detection and identification of specific metabolites from a single plant cell along with their localization within the cell, which will allow for comprehensive understanding of plant metabolomics on a single cell level.
Collapse
Affiliation(s)
- Keiko Masuda
- Laboratory for Single-Cell Mass Spectrometry, Quantitative Biology Center, RIKEN, Osaka, Japan.
| | - Yasmine Abouleila
- Laboratory for Single-Cell Mass Spectrometry, Quantitative Biology Center, RIKEN, Osaka, Japan
| | - Ahmed Ali
- Laboratory for Single-Cell Mass Spectrometry, Quantitative Biology Center, RIKEN, Osaka, Japan
| | - Toshio Yanagida
- Laboratory for Single-Cell Mass Spectrometry, Quantitative Biology Center, RIKEN, Osaka, Japan
| | - Tsutomu Masujima
- Laboratory for Single-Cell Mass Spectrometry, Quantitative Biology Center, RIKEN, Osaka, Japan
| |
Collapse
|