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Ademowo OS, Wenk MR, Maier AB. Advances in clinical application of lipidomics in healthy ageing and healthy longevity medicine. Ageing Res Rev 2024; 100:102432. [PMID: 39029802 DOI: 10.1016/j.arr.2024.102432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/11/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
It is imperative to optimise health and healthspan across the lifespan. The accumulation of reactive oxygen species (ROS) has been implicated in the hallmarks of ageing and inhibiting ROS production can potentially delay ageing whilst increasing healthy longevity. Lipids and lipid mediators (derivatives of lipids) are becoming increasingly recognized as central molecule in tissue and cellular function and are susceptible to peroxidation; hence linked with ageing. Lipid classes implicated in the ageing process include sterols, glycerophospholipids, sphingolipids and the oxidation products of polyunsaturated fatty acids but these are not yet translated into the clinic. Further mechanistic studies are required for the understanding of lipid classes in the ageing process. Lipidomics, the system level characterisation of lipid species with respect to metabolism and function, might provide a significant and useful biological age profiling tool through longitudinal studies. Lipid profiles in different ages among healthy individuals could be harnessed as lipid biomarkers of healthy ageing with potential integration for the development of lipid-based ageing clock (lipid clock). The potential of a lipid clock includes the prediction of future morbidity or mortality, which will promote precision and healthy longevity medicine.
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Affiliation(s)
- Opeyemi Stella Ademowo
- Healthy Ageing and Mental Wellbeing Research Centre, Biomedical and Clinical Sciences, University of Derby, UK
| | - Markus R Wenk
- Singapore Lipidomics Incubator (SLING), Life Sciences Institute, National University of Singapore, Singapore; Precision Medicine Translational Research Programme and Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore; College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
| | - Andrea B Maier
- Healthy Longevity Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, @AgeSingapore, National University Health System, Singapore; Department of Human Movement Sciences, @AgeAmsterdam, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
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Bradley R, Simon D, Spiga L, Xiang Y, Takats Z, Williams H. Laser desorption rapid evaporative ionization mass spectrometry (LD-REIMS) demonstrates a direct impact of hypochlorous acid stress on PQS-mediated quorum sensing in Pseudomonas aeruginosa. mSystems 2024; 9:e0116523. [PMID: 38530056 PMCID: PMC11019781 DOI: 10.1128/msystems.01165-23] [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: 11/09/2023] [Accepted: 02/26/2024] [Indexed: 03/27/2024] Open
Abstract
To establish infections in human hosts, Pseudomonas aeruginosa must overcome innate immune-generated oxidative stress, such as the hypochlorous acid (HOCl) produced by neutrophils. We set out to find specific biomarkers of oxidative stress through the development of a protocol for the metabolic profiling of P. aeruginosa cultures grown in the presence of different oxidants using a novel ionization technique for mass spectrometry, laser desorption rapid evaporative ionization mass spectrometry (LD-REIMS). We demonstrated the ability of LD-REIMS to classify samples as untreated or treated with a specific oxidant with 100% accuracy and identified a panel of 54 metabolites with significantly altered concentrations after exposure to one or more of the oxidants. Key metabolic changes were conserved in P. aeruginosa clinical strains isolated from patients with cystic fibrosis lung infections. These data demonstrated that HOCl stress impacted the Pseudomonas quinolone signal (PQS) quorum sensing system. Ten 2-alkyl-4-quinolones (AHQs) associated with the PQS system were significantly lower in concentration in HOCl-stressed P. aeruginosa cultures, including 2-heptyl-3-hydroxy-4(1H)-quinolone (PQS), the most active signal molecule of the PQS system. The PQS system regulates the production of virulence factors, including pyocyanin and elastase, and their levels were markedly affected by HOCl stress. No pyocyanin was detectable and elastase concentrations were reduced by more than 75% in cultures grown with sub-lethal concentrations of HOCl, suggesting that this neutrophil-derived oxidant may disrupt the ability of P. aeruginosa to establish infections through interference with production of PQS-associated virulence factors. IMPORTANCE This work demonstrates that a high-throughput ambient ionization mass spectrometry method can be used successfully to study a bacterial stress response. Its application to the opportunistic pathogen Pseudomonas aeruginosa led to the identification of specific oxidative stress biomarkers, and demonstrated that hypochlorous acid, an oxidant specifically produced by human neutrophils during infection, affects quorum sensing and reduces production of the virulence factors pyocyanin and elastase. No pyocyanin was detectable and elastase levels were reduced by more than 75% in bacteria grown in the presence of hypochlorous acid. This approach has the potential to be widely applicable to the characterization of the stress responses of bacteria.
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Affiliation(s)
- Rob Bradley
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Daniel Simon
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom
- The Rosalind Franklin Institute, Didcot, United Kingdom
| | - Livia Spiga
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
| | - Yuchen Xiang
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Zoltan Takats
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Huw Williams
- Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, London, United Kingdom
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De Spiegeleer M, Plekhova V, Geltmeyer J, Schoolaert E, Pomian B, Singh V, Wijnant K, De Windt K, Paukku V, De Loof A, Gies I, Michels N, De Henauw S, De Graeve M, De Clerck K, Vanhaecke L. Point-of-care applicable metabotyping using biofluid-specific electrospun MetaSAMPs directly amenable to ambient LA-REIMS. SCIENCE ADVANCES 2023; 9:eade9933. [PMID: 37294759 PMCID: PMC10256167 DOI: 10.1126/sciadv.ade9933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 05/05/2023] [Indexed: 06/11/2023]
Abstract
In recent years, ambient ionization mass spectrometry (AIMS) including laser ablation rapid evaporation IMS, has enabled direct biofluid metabolome analysis. AIMS procedures are, however, still hampered by both analytical, i.e., matrix effects, and practical, i.e., sample transport stability, drawbacks that impede metabolome coverage. In this study, we aimed at developing biofluid-specific metabolome sampling membranes (MetaSAMPs) that offer a directly applicable and stabilizing substrate for AIMS. Customized rectal, salivary, and urinary MetaSAMPs consisting of electrospun (nano)fibrous membranes of blended hydrophilic (polyvinylpyrrolidone and polyacrylonitrile) and lipophilic (polystyrene) polymers supported metabolite absorption, adsorption, and desorption. Moreover, MetaSAMP demonstrated superior metabolome coverage and transport stability compared to crude biofluid analysis and was successfully validated in two pediatric cohorts (MetaBEAse, n = 234 and OPERA, n = 101). By integrating anthropometric and (patho)physiological with MetaSAMP-AIMS metabolome data, we obtained substantial weight-driven predictions and clinical correlations. In conclusion, MetaSAMP holds great clinical application potential for on-the-spot metabolic health stratification.
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Affiliation(s)
- Margot De Spiegeleer
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Vera Plekhova
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Jozefien Geltmeyer
- Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | - Ella Schoolaert
- Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | - Beata Pomian
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Varoon Singh
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Kathleen Wijnant
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Kimberly De Windt
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Volter Paukku
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Alexander De Loof
- Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Inge Gies
- Department of Pediatrics, Free University of Brussels (VUB), University Hospital Brussels (UZ Brussel), Brussels, Belgium
| | - Nathalie Michels
- Department of Developmental, Personality and Social Psychology, Ghent University, Ghent, Belgium
| | - Stefaan De Henauw
- Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Marilyn De Graeve
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
| | - Karen De Clerck
- Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | - Lynn Vanhaecke
- Laboratory of Integrative Metabolomics, Department of Translational Physiology, Infectiology and Public Health, Ghent University, Ghent, Belgium
- Institute for Global Food Security, School of Biological Sciences, Queen’s University, Belfast, UK
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