Impact of fish growing conditions and cooking methods on selenium species in swordfish and salmon fillets

Luo

et al. 2021

J. Agric. Food Chem.

Hypercholesterolemia, one of the major risk factors of cardiovascular diseases, is a worldwide public health problem. Nutraceuticals and phytochemicals are attracting attention as a result of their cholesterol-lowering ability and minimal side effects. Among them, selenium (Se) is on the list. The amount of Se in foods varies by region. Se-enriched fertilizers and feeds can raise the Se content in plants and animals, while some processing methods decrease food Se content. This review summarizes recent studies on (1) the content distribution of Se in foods and factors influencing Se-enriched foods, (2) the bioavailability and metabolism of Se, and (3) the role of Se in affecting blood cholesterol and cholesterol metabolism. Although the hypocholesterolemic effect of Se is equivocal, its cholesterol-lowering activity may be more remarkable when the Se supplementation is 200 μg/day or the baseline blood total cholesterol is above 200 mg/dL in humans with low Se status.

Section: Food Sources Of Sementioning

confidence: 99%

Section: Factors Affecting Se Concentrations and Forms In Plants Anim...mentioning

confidence: 99%

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Food Chemistry of Selenium and Controversial Roles of Selenium in Affecting Blood Cholesterol Concentrations

Luo

et al. 2021

J. Agric. Food Chem.

“…It was well known that most of Se was believed to be incorporated into proteins through biotransformation in animal. And organic Se species (SeMet, selenocystine (SeCys 2 ), and methylselenocysteine (MeSeCys)) were more effective in alleviating deficiency symptoms [15,16]. In this work, the existence of SeCys 2 , SeMet, and MeSeCys in eggs was mainly concerned.…”

Section: Introductionmentioning

confidence: 93%

“…The aim of this study was to establish a method that could both efficiently extract of Se species and be able to keep the original Se speciation information in egg. For this purpose, several sample preparation methods (i.e., extraction with nonbuffered and buffered solution, enzymatic hydrolysis) were selected for Se speciation of liquid whole egg sample [2,[16][17][18][19]. The concentration of total Se in supernatants under different preparation procedure was determined by microwave-ICP-MS.…”

Section: Evaluation Of Different Sample Extraction Proceduresmentioning

confidence: 99%

Determination of Selenomethionine, Selenocystine, and Methylselenocysteine in Egg Sample by High Performance Liquid Chromatography—Inductively Coupled Plasma Mass Spectrometry

et al. 2022

The deficiency of selenium in dietary is recognized as a global problem. Eggs, as one of the most widely consumed food products, were readily enriched with selenium and became an important intake source of selenium for humans. In order to better understand the speciation and bioaccessibility of selenium in eggs, a simple and reliable approach that could be easily used in a routine laboratory was attempted to develop for analyzing selenium species. Three of organic selenium species (selenocystine, methylselenocysteine, and selenomethionine) in liquid whole egg were completely released by enzymatic hydrolysis and detected by high performance liquid chromatography in combination with inductively coupled plasma mass spectrometry (HPLC-ICP-MS). All the parameters in enzymatic hydrolysis and separation procedures were optimized. The effect of matrix in analysis was critically evaluated by standard addition calibrations and external calibrations. Under the optimal conditions, the spike recoveries of selenium species at 0.1–0.4 μg g−1 spike levels all exceeded 80%. This method was successfully applied to the determination of selenium species in fresh egg and cooked eggs.

Animal Research and One Health

Determination of selenium speciation in the muscle, kidney, and liver from different animals treated with different selenium supplements by HPLC‐ICP‐MS

Guo,

Jia,

Zhang

et al. 2024

Dietary selenium (Se) deficiency is recognized as a global problem, and exogenous Se supplementation can effectively enrich its levels in animal bodies. Offal tissues are equally important as meat in Se enrichment. Varying properties among Se species require information beyond total Se concentration to fully evaluate health risk/benefits. In the present study, the reliable inductively coupled plasma mass spectrometry (ICP‐MS) and HPLC‐ICP‐MS methods were optimized to analyze total Se content and Se speciation in the muscle and kidney of sheep, kidney and liver of pig, and liver of chicken after different Se supplementation treatments. The total Se contents in the liver and kidney were higher than in muscle. Five Se species were detected in the muscle, and selenourea was additionally detected in the liver and kidney. Sheep muscle and chicken liver mainly contained selenomethionine, and other tissues mainly contained selenocysteine. As the levels of selenomethionine or selenium‐enriched yeast increased in the feed, the proportion of selenomethionine in the sample increased, as well as the proportion of selenocysteine decreased, and almost no inorganic selenium was detected in all tissues. This study has provided insights for analyzing the Se enrichment patterns in tissues, which is significant for understanding the Se metabolism, animal health, and enriching the dietary Se supplementation for humans.