Abstract
This work represents the first systematic speciation study of selenium (Se) in plasma from subjects participating in a pilot study for a cancer prevention trial (PRECISE). This involved supplementation of elderly British and Danish individuals with selenised yeast for 6 months and 5 years, respectively, at 100, 200, and 300 μg Se/day or placebo. Speciation data was obtained for male plasma using HPLC-ICP-MS and HPLC-ESI-MS/MS. With the proposed strategy, approximately 1.5 mL of plasma was needed to determine total Se concentration and the fractionation of Se in high molecular weight (HMW) and low molecular weight (LMW) pools, and for quantification and identification of small Se species. For the first time, Se-methyl-selenocysteine (MSC) and methyl-2-acetamido-2deoxy1-seleno-β-d-galactopyranoside (Selenosugar-1) were structurally confirmed in plasma after supplementation with selenised yeast within the studied range. Determination of selenomethionine (SeMet) incorporated non-specifically into albumin (SeALB) was achieved by HPLC-ICP-MS after hydrolysis. By subtracting this SeMet concentration from the total Se in the HMW pool, the concentration of Se incorporated into selenoproteins was calculated. Results from the speciation analysis of the free Se metabolite fraction (5% of total plasma Se) suggest a significant increase in the percentage of Se (as SeMet plus Selenosugar-1) of up to 80% of the total Se in the LMW fraction after 6 months of supplementation. The Se distribution in the HMW fraction reflects a significant increase in SeALB with Se depletion from selenoproteins, which occurs most significantly at doses of over 100 μg Se/day after 5 years. The results of this work will inform future trial design.

Graphical abstract






Similar content being viewed by others
References
Rayman MP. Selenium in cancer prevention: a review of the evidence and mechanism of action. Proc Nutr Soc. 2005;64:527–42.
Clark LC, Dalkin B, Krongard A, Combs GF Jr, Turnbull BW, Slate EH, et al. Decreased incidence of prostate cancer with selenium supplementation: results of a double-blind cancer prevention trial. Br J Urol. 1998;81:730–4.
Peters U, Chatterjee N, Church TR, Mayo C, Sturup S, Foster CB, et al. High serum selenium and reduced risk of advanced colorectal adenoma in a colorectal cancer early detection program. Cancer Epidemiol Biomark Prev. 2006;15:315–20.
Medina D, Thompson H, Ganther H, Ip C. Se-methylselenocysteine: a new compound for chemoprevention of breast cancer. Nutr Cancer. 2001;40:12–7.
Combs GF, Clark LC, Turnbull BW. An analysis of cancer prevention by selenium. Biofactors. 2001;14:153–9.
Goenaga-Infante H, O’Connor G, Rayman MP, Wahlen R, Entwisle J, Norris P, et al. Selenium speciation analysis of selenium-enriched supplements by HPLC with ultrasonic nebulisation ICP-MS and electrospray MS/MS detection. J Anal At Spectrom. 2004;19:1529–38.
Rayman MP. Selenium and human health. Lancet. 2012;379:1256–68.
Dipple A, Pigott MA, Milner JA. Selenium modifies carcinogen metabolism by inhibiting enzyme induction. Biol Trace Elem Res. 1986;10:153–7.
Kiremidjian-Schumacher L, Roy M, Wishe HI, Cohen MW, Stotzky G. Supplementation with selenium and human immune cell functions. Biol Trace Elem Res. 1994;41:115–27.
Becker K, Gromer S, Schirmer RH, Müller S. Thioredoxin reductase as a pathophysiological factor and drug target. Eur J Biochem. 2000;267:6118–25.
Wang Z, Jiang C, Lü J. Induction of caspase mediated apoptosis and cell cycle G1 arrest by selenium metabolite methylselenol. Mol Carcinog. 2002;34:113–20.
Papp LV, Lu J, Holmgren A, Khanna KK. From selenium to selenoproteins: synthesis, identity, and their role in human health. Antioxid Redox Signal. 2007;9:775–06.
Jitaru P, Goenaga-Infante H, Vaslin-Reimann S, Fisicaro P. A systematic approach to the accurate quantification of selenium in serum selenoalbumin by HPLC–ICP-MS. Anal Chim Acta. 2010;657:100–7.
Ip C, Dong Y, Ganther HE. New concepts in selenium chemoprevention. Cancer Metastasis Rev. 2002;21:281–9.
Ip C, Thompson HJ, Zhu Z, Ganther HE. In vitro and in vivo studies of methylseleninic acid: evidence that a monomethylated selenium metabolite is critical for cancer chemoprevention. Cancer Res. 2000;60:2882–6.
Clark LC, Combs GF Jr, Turnbull BW, Slate EH, Chalker DK, Chow J, et al. Effects of selenium supplementation for cancer prevention in patients with carcinoma of the skin. JAMA. 1996;276:1957–63.
Lippman SM, Klein EA, Goodman PJ, Scott Lucia M, Thompson IM, Ford LG, et al. Effect of selenium and vitamin E on risk of prostate cancer and other cancers. The Selenium and Vitamin E Cancer Prevention Trial (SELECT). JAMA. 2009;301:39–51.
Duffield-Lillicio AJ, Dalkin BL, Reid ME, Turnbull BW, Slate EH, Jacobs ET, et al. Selenium supplementation, baseline plasma selenium status and incidence of prostate cancer: an analysis of the complete treatment period of the Nutritional Prevention of Cancer trial. Br J Urol. 2003;91:608–12.
Kokarnig S, Tsirigotaki A, Wisenhofer T, Lackner V, Francesconi KA, Pergantis SA, et al. Concurrent quantitative HPLC–mass spectrometry profiling of small selenium species in human serum and urine after ingestion of selenium supplements. J Trace Elem Med Biol. 2015;29:83–90.
Kokarnig S, Kuehnelt D, Stiboller M, Hartleb U, Francesconi K. Quantitative determination of small selenium species in human serum by HPLC/ICPMS following a protein-removal, pre-concentration procedure. Anal Bioanal Chem. 2011;400:2323–7.
Flouda K, Derch JM, Gabel-Jensen C, Stürup S, Misra S, Björnstedt M, et al. Quantification of low molecular weight selenium metabolites in human plasma after treatment with selenite in pharmacological doses by LC-ICP-MS. Anal Bioanal Chem. 2016;408:2293–01.
Persson-Moschos M, Alfthan G, Ȧkesson B. Plasma selenoprotein P levels of healthy males in different selenium status after oral supplementation with different forms of selenium. Eur J Clin Nutr. 1998;52:363–7.
Burk RF, Norsworthy BK, Hill KE, Motley AK, Byrne DW. Effects of chemical form of selenium on plasma biomarkers in a high-dose human supplementation trial. Cancer Epidemiol Biomark Prev. 2006;15:804–10.
Palacios Ò, Ruiz Encinar J, Schaumlöffel D, Lobinski R. Fractionation of selenium-containing proteins in serum by multiaffinity liquid chromatography before size-exclusion chromatography–ICPMS. Anal Bioanal Chem. 2006;384:1276–83.
Jitaru P, Prete M, Cozzi G, Turetta C, Cairns W, Seraglia R, et al. Speciation analysis of selenoproteins in human serum by solid-phase extraction and affinity HPLC hyphenated to ICP-quadrupole MS. J Anal At Spectrom. 2008;23:402–6.
Solovyev N, Berthele A, Michalke B. Selenium speciation in paired serum and cerebrospinal fluid samples. Anal Bioanal Chem. 2013;405:1875–84.
Jitaru P, Roman M, Cozzi G, Fisicaro P, Cescon P, Barbante C. Speciation analysis of selenoproteins in human serum by microbore affinity-HPLC hyphenated to ICP-sector field-MS using a high efficiency sample introduction system. Microchim Acta. 2009;166:319–27.
Jitaru P, Cozzi G, Gambaro A, Cescon P, Barbante C. Simultaneous speciation analysis of glutathione peroxidase, selenoprotein P and selenoalbumin in human serum by tandem anion exchange-affinity HPLC and on-line isotope dilution ICP-quadrupole MS. Anal Bioanal Chem. 2008;391:661–9.
Hinojosa Reyes L, Marchante-Gayón JM, García Alonso JI, Sanz-Medel A. Quantitative speciation of selenium in human serum by affinity chromatography coupled to post-column isotope dilution analysis ICP-MS. J Anal At Spectrom. 2003;18:1210–6.
Letsiou S, Lu Y, Nomikos T, Antonopoulou S, Panagiotakos D, Panagiotakos D, et al. High-throughput quantification of selenium in individual serum proteins from a healthy human population using HPLC on-line with isotope dilution inductively coupled plasma-MS. Proteomics. 2010;10:3447–57.
Garcia-Sevillano MA, Garcia-Barrera T, Gomez-Ariza JL. Development of a new column switching method for simultaneous speciation of selenometabolites and selenoproteins in human serum. J Chromatogr A. 2013;1318:171–9.
Jeong J-S, Lee J, Pak Y-N. Quantitative speciation of selenium in human blood serum and urine with AE- RP- and AF-HPLC-ICP/MS. Bull Kor Chem Soc. 2013;34:3817–24.
Ruiz Encinar J, Schaumlöffel D, Ogra Y, Lobinski R. Determination of selenomethionine and selenocysteine in human serum using speciated isotope dilution-capillary HPLC-inductively coupled plasma collision cell mass spectrometry. Anal Chem. 2004;76:6635–42.
Deitrich CL, Cuello-Nuñez S, Kmiotek D, Torma FA, Estela del Castillo Busto M, Fisicaro P, et al. Accurate quantification of selenoprotein P (SEPP1) in plasma using isotopically enriched seleno-peptides and species-specific isotope dilution with HPLC coupled to ICP-MS/MS. Anal Chem. 2016;88:6357–65.
Rayman MP, Stranges S, Griffin BA, Pastor-Barriuso P, Guallar E. Effect of supplementation with high-selenium yeast on plasma lipids. Ann Intern Med. 2011;154:656–65.
Rayman MP, Winther KH, Pastor-Barriuso R, Cold F, Thvilum M, Stranges S, et al. 2018 Effect of long-term selenium supplementation on mortality: results from a multiple-dose, randomised controlled trial. Free Radic Biol Med. 2018;127:46–54.
Rayman MP, Thompson A, Warren-Perry M, Galassini R, Catterick J, Hall E, et al. Impact of selenium on mood and quality of life: a randomized, controlled trial. Biol Psychiatry. 2006;59:147–54.
Rayman MP, Thompson AJ, Bekaert B, Catterick J, Galassini R, Hall E, et al. Randomized controlled trial of the effect of selenium supplementation on thyroid function in the elderly in the United Kingdom. Am J Clin Nutr. 2008;87:370–8.
Bekaert B, Cooper ML, Green FR, McNulty H, Pentieva K, Scott JM, et al. Effect of selenium status and supplementation with high-selenium yeast on plasma homocysteine and B vitamin concentrations in the UK elderly. Mol Nutr Food Res. 2008;52:1324–33.
Méplan C, Crosley LK, Nicol F, Beckett GJ, Howie AF, Hill KE, et al. Genetic polymorphisms in the human selenoprotein P gene determine the response of selenoprotein markers to selenium supplementation in a gender-specific manner (the SELGEN study). FASEB J. 2007;21:3063–74.
Méplan C, Crosley LK, Nicol F, Horgan GW, Mathers JC, Arthur JR, et al. Functional effects of a common single-nucleotide polymorphism (GPX4c718t) in the glutathione peroxidase 4 gene: interaction with sex. Am J Clin Nutr. 2008;87:1019–27.
EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Scientific Opinion on Dietary Reference Values for selenium. EFSA J. 2014;12:3846.
Goenaga-Infante H, Sturgeon R, Turner J, Hearn R, Sargent M, Maxwell P, et al. Total selenium and selenomethionine in pharmaceutical yeast tablets: assessment of the state of the art of measurement capabilities through international intercomparison CCQM-P86. Anal Bioanal Chem. 2008;390:629–42.
Warburton E, Goenaga-Infante H. Methane mixed plasma—improved sensitivity of inductively coupled plasma mass spectrometry detection for selenium speciation analysis of wheat-based food. J Anal At Spectrom. 2007;22:370–6.
Rayman MP. The use of high-selenium yeast to raise selenium status: how does it measure up? Br J Nutr. 2004;92:557–72.
Jitaru P, Roman M, Barbante C, Vaslin-Reimann S, Fisicaro P. Challenges in the accurate speciation analysis of selenium in humans: first report on indicative levels of selenoproteins in a serum certified reference material for total selenium (BCR-637). Accred Qual Assur. 2010;15:343–50.
Ogra Y, Ishiwata K, Takayama H, Aimi N, Suzuki KT. Identification of a novel selenium metabolite, se-methyl-N-acetylselenohexosamine, in rat urine by high-performance liquid chromatography–inductively coupled plasma mass spectrometry and –electrospray ionization tandem mass spectrometry. J Chromatogr B Biomed Appl. 2002;767:301–12.
Gabel-Jensen C, Odgaard J, Skonberg C, Badolo, Gammelgaard B. LC-ICP-MS and LC-ESI-(MS)n identification of Se-methylselenocysteine and selenomethionine as metabolites of methylseleninic acid in rat hepatocytes. J Anal At Spectrom. 2009;24:69–75.
Acknowledgements
Thanks go to Bryan McCullough, Camilla Liscio, and Volker Nischwitz for their help with the determination of Selenosugar-1 by ESI-MS/MS. We also like to thank M. Estela del Castillo Busto for valuable discussions before and during the preparation of this manuscript. We acknowledge the donations of the Danish trial samples for further studies from Pharma Nord Asp as part of a commercial project.
Funding
The authors receive funding for their work from the UK National Measurement System Chemical and Biological Measurement Program, funded by the Department of Business, Energy & Industrial Strategy.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The UK PRECISE Pilot Trial (NCT00022165) had approval from UK Local Research Ethics Committees (South Tees (ref: 99/69), Worcestershire Health Authority (ref: LREC 74/99), Norwich District (ref: LREC 99/141), Great Yarmouth and Waveney (under reciprocal arrangements with Norwich District LREC)), and participants provided written informed consent. The Denmark PRECISE pilot study (ClinicalTrials.gov ID: NCT01819649) was approved by regional Data Protection Agency and Scientific Ethics Committees of Vejle and Funen counties.
Conflict of interest
The authors declare that they have no conflict of interest.
Additional information
Publisher’s note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Published in the topical collection featuring Female Role Models in Analytical Chemistry.
Supplementary Information
ESM 1
(PDF 409 kb).
Rights and permissions
About this article
Cite this article
Ward-Deitrich, C.L., Whyte, E., Hopley, C. et al. Systematic study of the selenium fractionation in human plasma from a cancer prevention trial using HPLC hyphenated to ICP-MS and ESI-MS/MS. Anal Bioanal Chem 413, 331–344 (2021). https://doi.org/10.1007/s00216-020-02988-9
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00216-020-02988-9

