Normothermic ex vivo lung perfusion(NEVLP)has emerged as a modernized organ preservation tech-nique that allows for detailed assessment of donor lung function prior to transplantation.The main goal of this study was to identify potential biomarkers of lung function and/or injury during a prolonged(19 h)NEVLP procedure using in vivo solid-phase microextraction(SPME)technology followed by liquid chromatography-high resolution mass spectrometry(LC-HRMS).The use of minimally invasive in vivo SPME fibers for repeated sampling of biological tissue permits the monitoring and evaluation of biochemical changes and alterations in the metabolomic profile of the lung.These in vivo SPME fibers were directly introduced into the lung and were also used to extract metabolites(on-site SPME)from fresh perfusate samples collected alongside lung samplings.A subsequent goal of the study was to assess the feasibility of SPME as an in vivo method in metabolomics studies,in comparison to the traditional in-lab metabolomics workflow.Several upregulated biochemical pathways involved in pro-and anti-inflammatory responses,as well as lipid metabolism,were observed during extended lung perfusion,especially between the 11th and 12th hours of the procedure,in both lung and perfusate samples.However,several unstable and/or short-lived metabolites,such as neuroprostanes,have been extracted from lung tissue in vivo using SPME fibers.On-site monitoring of the metabolomic profiles of both lung tissues through in vivo SPME and perfusate samples on site throughout the prolonged NEVLP procedure can be effectively performed using in vivo SPME technology.

Nikita Looby;Anna Roszkowska;Aadil Ali;Barbara Bojko;Marcelo Cypel;Janusz Pawliszyn

Department of Chemistry,University of Waterloo,Waterloo,N2L 3G1,Canada;Department of Pharmaceutical Chemistry,Medical University of Gdansk,80-416,Gdansk,Poland;Division of Thoracic Surgery,University Health Network,Toronto,M5G 2C4,Canada;Department of Pharmacodynamics and Molecular Pharmacology,Faculty of Pharmacy,Collegium Medicum in Bydgoszcz,Nicolaus Copernicus University in Torun,85-089,Bydgoszcz,Poland

药物分析学报（英文）

[1]Nikita Looby;Anna Roszkowska;Aadil Ali;Barbara Bojko;Marcelo Cypel;Janusz Pawliszyn-.Metabolomic fingerprinting of porcine lung tissue during pre-clinical prolonged ex vivo lung perfusion using in vivo SPME coupled with LC-HRMS)[J].药物分析学报（英文）,2022(04):590-600

Normothermic,NEVLP,modernized,perfusate,neuroprostanes

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