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Li Y, Miao S, Tan J, Zhang Q, Chen DDY. Capillary Electrophoresis: A Three-Year Literature Review. Anal Chem 2024; 96:7799-7816. [PMID: 38598751 DOI: 10.1021/acs.analchem.4c00857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Affiliation(s)
- Yueyang Li
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Siyu Miao
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jiahua Tan
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Qi Zhang
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, P. R. China
| | - David Da Yong Chen
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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Vallianatou T, de Souza Anselmo C, Tsiara I, Bèchet NB, Lundgaard I, Globisch D. Identification of New Ketamine Metabolites and Their Detailed Distribution in the Mammalian Brain. ACS Chem Neurosci 2024; 15:1335-1341. [PMID: 38506562 PMCID: PMC10995950 DOI: 10.1021/acschemneuro.4c00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 03/21/2024] Open
Abstract
Ketamine is a common anesthetic used in human and veterinary medicine. This drug has recently received increased medical and scientific attention due to its indications for neurological diseases. Despite being applied for decades, ketamine's entire metabolism and pharmacological profile have not been elucidated yet. Therefore, insights into the metabolism and brain distribution are important toward identification of neurological effects. Herein, we have investigated ketamine and its metabolites in the pig brain, cerebrospinal fluid, and plasma using mass spectrometric and metabolomics analysis. We discovered previously unknown metabolites and validated their chemical structures. Our comprehensive analysis of the brain distribution of ketamine and 30 metabolites describes significant regional differences detected mainly for phase II metabolites. Elevated levels of these metabolites were identified in brain regions linked to clearance through the cerebrospinal fluid. This study provides the foundation for multidisciplinary studies of ketamine metabolism and the elucidation of neurological effects by ketamine.
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Affiliation(s)
- Theodosia Vallianatou
- Department
of Chemistry-BMC, Science for Life Laboratory, Uppsala University, Box 576, 75123 Uppsala, Sweden
| | - Carina de Souza Anselmo
- Department
of Chemistry-BMC, Science for Life Laboratory, Uppsala University, Box 576, 75123 Uppsala, Sweden
| | - Ioanna Tsiara
- Department
of Chemistry-BMC, Science for Life Laboratory, Uppsala University, Box 576, 75123 Uppsala, Sweden
| | - Nicholas B. Bèchet
- Department
of Experimental Medical Science, Lund University, 22362 Lund, Sweden
- Wallenberg
Centre for Molecular Medicine, Lund University, 22362 Lund, Sweden
| | - Iben Lundgaard
- Department
of Experimental Medical Science, Lund University, 22362 Lund, Sweden
- Wallenberg
Centre for Molecular Medicine, Lund University, 22362 Lund, Sweden
| | - Daniel Globisch
- Department
of Chemistry-BMC, Science for Life Laboratory, Uppsala University, Box 576, 75123 Uppsala, Sweden
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Vallianatou T, Nilsson A, Bjärterot P, Shariatgorji R, Slijkhuis N, Aerts JT, Jansson ET, Svenningsson P, Andrén PE. Rapid Metabolic Profiling of 1 μL Crude Cerebrospinal Fluid by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging Can Differentiate De Novo Parkinson's Disease. Anal Chem 2023; 95:18352-18360. [PMID: 38059473 PMCID: PMC10733901 DOI: 10.1021/acs.analchem.3c02900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 12/08/2023]
Abstract
Parkinson's disease (PD) is a highly prevalent neurodegenerative disorder affecting the motor system. However, the correct diagnosis of PD and atypical parkinsonism may be difficult with high clinical uncertainty. There is an urgent need to identify reliable biomarkers using high-throughput, molecular-specific methods to improve current diagnostics. Here, we present a matrix-assisted laser desorption/ionization mass spectrometry imaging method that requires minimal sample preparation and only 1 μL of crude cerebrospinal fluid (CSF). The method enables analysis of hundreds of samples in a single experiment while simultaneously detecting numerous metabolites with subppm mass accuracy. To test the method, we analyzed CSF samples from 12 de novo PD patients (that is, newly diagnosed and previously untreated) and 12 age-matched controls. Within the identified molecules, we found neurotransmitters and their metabolites such as γ-aminobutyric acid, 3-methoxytyramine, homovanillic acid, serotonin, histamine, amino acids, and metabolic intermediates. Limits of detection were estimated for multiple neurotransmitters with high linearity (R2 > 0.99) and sensitivity (as low as 16 pg/μL). Application of multivariate classification led to a highly significant (P < 0.001) model of PD prediction with a 100% classification rate, which was further thoroughly validated with a permutation test and univariate analysis. Molecules related to the neuromelanin pathway were found to be significantly increased in the PD group, indicated by their elevated relative intensities compared to the control group. Our method enables rapid detection of PD-related biomarkers in low sample volumes and could serve as a valuable tool in the development of robust PD diagnostics.
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Affiliation(s)
- Theodosia Vallianatou
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Anna Nilsson
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Patrik Bjärterot
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Reza Shariatgorji
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Nuria Slijkhuis
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Jordan T. Aerts
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Erik T. Jansson
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
| | - Per Svenningsson
- Department
of Clinical Neuroscience, Karolinska Institute, Stockholm SE-17177, Sweden
| | - Per E. Andrén
- Department
of Pharmaceutical Biosciences, Spatial Mass Spectrometry, Science
for Life Laboratory, Uppsala University, Uppsala SE-75124, Sweden
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Aerts JT, Andrén PE, Jansson ET. Electrochemically Etched Tapered-Tip Stainless-Steel Electrospray-Ionization Emitters for Capillary Electrophoresis-Mass Spectrometry. J Proteome Res 2023; 22:1377-1380. [PMID: 36866861 PMCID: PMC10088039 DOI: 10.1021/acs.jproteome.3c00076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
We have used household consumables to facilitate electrochemical etching of stainless-steel hypodermic tubing to produce tapered-tip emitters suitable for electrospray ionization for use in mass spectrometry. The process involves the use of 1% oxalic acid and a 5 W USB power adapter, commonly known as a phone charger. Further, our method avoids the otherwise commonly used strong acids that entail chemical hazards: concentrated HNO3 for etching stainless steel, or concentrated HF for etching fused silica. Hence, we here provide a convenient and self-inhibiting procedure with minimal chemical hazards to manufacture tapered-tip stainless-steel emitters. We show its performance in metabolomic analysis with CE-MS of a tissue homogenate where the metabolites acetylcarnitine, arginine, carnitine, creatine, homocarnosine, and valerylcarnitine were identified, all with basepeak separated electropherograms, within <6 min of separation. The mass spectrometry data are freely available through the MetaboLight public data repository via access number MTBLS7230.
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Affiliation(s)
- Jordan T Aerts
- Department of Pharmaceutical Biosciences, Uppsala University, SE-751 24 Uppsala, Sweden
| | - Per E Andrén
- Department of Pharmaceutical Biosciences, Uppsala University, SE-751 24 Uppsala, Sweden.,Science for Life Laboratory, Spatial Mass Spectrometry, Uppsala University, SE-751 24 Uppsala, Sweden
| | - Erik T Jansson
- Department of Pharmaceutical Biosciences, Uppsala University, SE-751 24 Uppsala, Sweden
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