The effect of feeding organically bound selenium and α-tocopherol to dairy cows on susceptibility of milk to oxidation

Nicholson, J. W. G.; St-Laurent, A. M.; McQueen, R. E.; Charmley, E.

doi:10.4141/cjas91-015

Cited by 21 publications

(13 citation statements)

References 2 publications

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“…There is evidence of a Se and vitamin E interaction in defence against mastitis in cattle (Hemingway, 1999) and that Se supplementation improved the transfer of dietary a-tocopherol to cows' milk (Nicholson et al 1991). Such studies are yet to be carried out in human subjects.…”

Section: Selenium Interactions and Breast-feedingmentioning

confidence: 99%

Selenium and breast-feeding

Dórea

2002

Br J Nutr

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The objective of the present review is to discuss Se nutrition during breast-feeding, encompassing environmental and maternal constitutional factors affecting breast-milk-Se metabolism and secretion. A literature search of Medline and Webofscience was used to retrieve and select papers dealing with Se and breast milk. Although Se in natural foods occurs only in organic form, breast milk responds to organic and inorganic Se in supplements. Inorganic Se (selenite, selenate), which is largely used in maternal supplements, is not detectable in breast milk. The mammary-gland regulating mechanism controls the synthesis and secretion of seleno-compounds throughout lactation, with a high total Se level in colostrum that decreases as lactation progresses. Se appears in breast milk as a component of specific seleno-proteins and selenoamino-acids in milk proteins that are well tolerated by breast-fed infants even in high amounts. Se in breast milk occurs as glutathione peroxidase (4 -32 % total Se) . selenocystamine . selenocystine . selenomethionine. The wide range of breast-milk Se concentrations depends on Se consumed in natural foods, which reflects the Se content of the soils where they are grown. Se prophylaxis, either through soil Se fertilization or maternal supplements, is effective in raising breast-milk Se concentration. In spite of wide variation, the median Se concentration from studies worldwide are 26, 18, 15, and 17 mg/l in colostrum (0 -5 d), transitional milk (6 -21 d), mature milk (1 -3 months) and late lactation (.5 months) respectively. Se recommendations for infants are presently not achieved in 30 % of the reported breast-milk Se concentrations; nevertheless Se status is greater in breast-fed than in formula-fed infants.

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Section: Selenium Interactions and Breast-feedingmentioning

confidence: 99%

Selenium and breast-feeding

Dórea

2002

Br J Nutr

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“…Any additional effect of selenium from supplementation with organic selenium in the form of SeMet from yeast grown with high selenium levels would depend on the non-specific incorporation of SeMet into proteins (Bierla, Szpunar, & Lobinski, 2008;Suzuki & Ogra, 2002) or low molecular weight seleniumcontaining components. Although no effects of selenium supplementation on oxidative stability of milk have been observed previously (Charmley, Nicholson, & Zee, 1993;Franke, Dunkley, Luick, & Ronning, 1966;Nicholson, St Laurent, Mc Queen, & Charmley, 1991), a secondary effect on a-tocopherol uptake has been suggested (Nicholson et al, 1991).…”

Section: Introductionmentioning

confidence: 97%

Oxidative stability of bovine milk determined by individual variability in herd irrespective of selenium status

Clausen

Connolly

Skibsted

et al. 2010

International Dairy Journal

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“…Muñiz-Naviero et al (2006) avaliaram a concentração de Se no leite e observaram maior biodisponibilidade do mineral no tratamento com Se orgânico, comparado ao tratamento com selenito de sódio. Nicholson et al (1991) estudaram a administração de duas fontes de Se (orgânico e inorgânico), associadas ou não à vitamina E (3.000 UI por dia), em seu efeito sobre a estabilidade oxidativa do leite avaliada por análise sensorial. Os autores observaram maior concentração de Se no leite, no tratamento com Se orgânico, e concluíram que a concentração adequada de Se aumentou a transferência de vitamina E para o leite.…”

Section: Introductionunclassified

Perfil de ácidos graxos e estabilidade oxidativa do leite de vacas holandesas alimentadas com soja extrusada e selênio orgânico

Paschoal

Zanetti

Claro

et al. 2007

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito de dieta com alto teor de soja extrusada e selênio orgânico sobre o perfil de ácidos graxos e a estabilidade oxidativa do leite de vacas da raça Holandesa. Vinte e quatro vacas foram divididas em três blocos e distribuídas ao acaso em três tratamentos: dieta controle; dieta com 21% de soja extrusada e dieta com 21% de soja extrusada + 5 mg de selênio orgânico. O experimento teve duração de seis semanas. As vacas alimentadas com soja extrusada produziram leite com menor concentração de ácidos graxos de cadeias curta e média, maior concentração de ácidos graxos de cadeia longa, menor concentração de ácidos graxos saturados e maior concentração de ácidos graxos poliinsaturados e de ácido linoléico conjugado. A suplementação com selênio aumentou a sua concentração no leite e retardou o processo oxidativo do leite. A dieta com 21% de soja extrusada alterou o perfil de ácidos graxos do leite, aumentando sua susceptibilidade à oxidação; o enriquecimento com selênio minimizou esse efeito e influenciou positivamente a estabilidade do leite.Termos para indexação: antioxidante, ácido linoléico conjugado, índice de peróxidos, TBARS. Fatty acid profile and oxidative stability of milk from Holstein cows fed with extruded soybean and organic seleniumAbstract -The objective of this work was to evaluate the effect of extruded soybean and organic selenium supplementation on fatty acid profile and oxidative stability of Holstein milk. Twenty-four Holstein cows were distributed in three blocks and were allocated in three treatments: control diet; diet with 21% extruded soybean; and diet with 21% of extruded soybean + 5 mg of organic selenium. The experiment lasted six weeks. The cows fed with extruded soybean diet produced milk with lower concentration of short and medium chain fatty acids and higher concentration of long chain fatty acids, lower concentration of saturated fatty acids and higher concentration of polyunsaturated fatty acids and conjugated linoleic acid content. The organic selenium supplementation increased milk selenium concentration and delayed milk oxidation. Diet with 21% extruded soybean modified fatty acid profile and resulted in milk susceptible to oxidation. Organic selenium supplementation reduced oxidation and influenced positively the stability of milk.

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The effect of feeding organically bound selenium and α-tocopherol to dairy cows on susceptibility of milk to oxidation

Cited by 21 publications

References 2 publications

Selenium and breast-feeding

Selenium and breast-feeding

Oxidative stability of bovine milk determined by individual variability in herd irrespective of selenium status

Perfil de ácidos graxos e estabilidade oxidativa do leite de vacas holandesas alimentadas com soja extrusada e selênio orgânico

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