Joint determination of nine uremic toxins and choline in blood serum using high-performance liquid chromatography with tandem mass spectrometric detection
- Authors: Alyushina T.I.1, Savelyeva E.I.1, Dobronravov V.A.2
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Affiliations:
- Research Institute of Hygiene, Occupational Pathology, and Human Ecology of the Federal Medical-Biological Agency of Russia
- Research Institute of Nephrology, I.P. Pavlov First St. Petersburg State Medical University
- Issue: Vol 79, No 8 (2024)
- Pages: 900-909
- Section: ORIGINAL ARTICLES
- Submitted: 03.06.2025
- URL: https://rjmseer.com/0044-4502/article/view/682322
- DOI: https://doi.org/10.31857/S0044450224080094
- EDN: https://elibrary.ru/tjelgc
- ID: 682322
Cite item
Abstract
This paper presents a method for the simultaneous determination of nine uremic toxins and choline in blood serum. The target substances were selected based on literature data as potential biomarkers for assessing the severity and progression of immunoglobulin A nephropathy, a kidney disease that leads to disability, and, without timely treatment, death in young and middle-aged individuals. Ultrafiltration is used to separately determine free and protein-bound indolic uremic toxins in the blood. The use of high-performance liquid chromatography combined with high-resolution tandem mass spectrometry ensures satisfactory accuracy of the analysis without complete chromatographic separation of analytes under standard reversed-phase HPLC conditions. For calibration purposes, an albumin solution in phosphate buffer was used as a surrogate for blood serum. The protein concentration of 45 mg/mL and pH 7.4 match the characteristics of native blood serum. A pilot experiment demonstrated the feasibility of determining key indicators of the gut microbiome’s state—choline and trimethylamine N-oxide (TMAO)—in dried blood spots.
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About the authors
T. I. Alyushina
Research Institute of Hygiene, Occupational Pathology, and Human Ecology of the Federal Medical-Biological Agency of Russia
Email: saveleva@rihophe.site
Russian Federation, Kuzmolovsky Settlement, Leningrad Region
E. I. Savelyeva
Research Institute of Hygiene, Occupational Pathology, and Human Ecology of the Federal Medical-Biological Agency of Russia
Author for correspondence.
Email: saveleva@rihophe.site
Russian Federation, Kuzmolovsky Settlement, Leningrad Region
V. A. Dobronravov
Research Institute of Nephrology, I.P. Pavlov First St. Petersburg State Medical University
Email: saveleva@rihophe.site
Russian Federation, St. Petersburg
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