Rapid oxidation of dl-selenomethionine by peroxynitrite

Padmaja, S.; Squadrito, G; Lemercier, Jean-Noël; Cueto, Rafael; Pryor, William A.

doi:10.1016/0891-5849(96)00132-3

Cited by 87 publications

(56 citation statements)

References 33 publications

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“…According to Padmaja et al (1996) and Sies and Arteel (2000), the antioxidant property of selenomethionine is related to its capacity to act as a scavenger of strong oxidant peroxynitrite. The degree of lipid oxidation of muscle tissue is evaluated by determination of malonaldehyde content (TBA-value).…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Se-enriched Alga Chlorella spp. and Se-enriched Yeast on Tissue Selenium Retention and Carcass Characteristics in Finisher Pigs

Svoboda¹,

Saláková

Fajt³

et al. 2009

Acta Vet. Brno

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The aim of this study was to evaluate the effect of organic Se from Se-enriched alga (Chlorella spp.) and Se from Se-enriched yeast on concentrations of Se in serum and tissues, and serum GSH-Px activities and carcass characteristics in finishing pigs.The pigs were on experimental diets for a period of 3 months before slaughter with different Se supplements at the concentration of 0.3 mg Se per kg of feed. In group I (n = 12) the feed was supplemented with inorganic sodium selenite; in group II (n = 12) with organic Se from Se-enriched yeast; in group III (n = 12) with organic Se from Se-enriched alga, Chlorella spp. and pigs in group IV (n = 11) received a non-supplemented basal diet. The organic Se sources did not differ in serum Se and serum GSH-Px activities. Significantly higher Se concentrations in muscle (P < 0.01) and in the heart (P < 0.01) were found when Se from Se-enriched yeast was given, compared to the group of pigs that received Se from Se-enriched alga Chlorella spp. The Se content in livers and ovaries did not differ between the two organic Se sources. The use of both organic Se forms resulted in a higher accumulation in muscle tissue compared to the inorganic Se form. No differences in meat quality characteristics were found among the experimental groups. It is concluded that Se from Se-enriched alga, Chlorella spp. had a lower accumulation in muscle tissue than Se from Se-enriched yeast, and it did not affect meat quality.Glutathion peroxidase, GSH-Px, pork, meat quality, sodium selenite

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Section: Discussionmentioning

confidence: 99%

Efficacy of Se-enriched Alga Chlorella spp. and Se-enriched Yeast on Tissue Selenium Retention and Carcass Characteristics in Finisher Pigs

Svoboda¹,

Saláková

Fajt³

et al. 2009

Acta Vet. Brno

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“…The selenoxides of selenoamino acids have been found in natural samples [26][27][28][29] and, in the case of selenized yeasts or nutritional supplement extracts, selenium compounds eluting early under reversed phase mobile phase conditions, may be such oxidation products.…”

Section: Oxidation Of Selenoamino Acidsmentioning

confidence: 99%

Element selective characterization of stability and reactivity of selenium species in selenized yeast

Uden

Boakye

Kahakachchi

et al. 2004

J. Anal. At. Spectrom.

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The concerted application of element specific atomic spectral detection for chromatographic eluent monitoring allows previously unexploited qualitative and quantitative analytical concepts to be developed for the determination of selenium species. Selenium speciation is vital in order to better understand its metabolism and biological significance in clinical chemistry, biology, toxicology, and nutrition. Fluoroacid ion pair HPLC with ICP-MS detection and GC derivatization with atomic emission detection (AED) together aid analysis and elucidation of reaction pathways of selenium compounds in high selenium enriched yeast, as used widely in nutritional and clinical cancer preventative studies. Comparisons between currently produced and archived selenized yeasts show major differences in speciation. The formation of selenomethionine selenoxide and the identification of Se-S bonded S-(selenomethyl)-cysteine in archived nutritional yeast may be important for short and long term stability and nutritional activity studies.

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“…Atomic absorption spectrometry synthesized and studied in connection with interest in (AAS) and electrothermal AAS (ETAAS) have also the antioxidant activity of selenium; thus selenobeen used for detection in on-or off-line modes methionine selenoxide was produced by oxidation of [19,20,[22][23][24]. Casiot et al [25] identified Seselenomethionine [41][42][43]. adenosyl-selenohomocysteine in a yeast extract using As a part of an ongoing study of the cancer off-line electrospray ionization (ESI)-MS detection.…”

Section: Introductionmentioning

confidence: 99%

High-performance liquid chromatography of selenium compounds utilizing perfluorinated carboxylic acid ion-pairing agents and inductively coupled plasma and electrospray ionization mass spectrometric detection

Kotrebai

Tyson

Block

et al. 2000

Journal of Chromatography A

137

107

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Rapid oxidation of dl-selenomethionine by peroxynitrite

Cited by 87 publications

References 33 publications

Efficacy of Se-enriched Alga Chlorella spp. and Se-enriched Yeast on Tissue Selenium Retention and Carcass Characteristics in Finisher Pigs

Efficacy of Se-enriched Alga Chlorella spp. and Se-enriched Yeast on Tissue Selenium Retention and Carcass Characteristics in Finisher Pigs

Element selective characterization of stability and reactivity of selenium species in selenized yeast

High-performance liquid chromatography of selenium compounds utilizing perfluorinated carboxylic acid ion-pairing agents and inductively coupled plasma and electrospray ionization mass spectrometric detection

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