Effect of Dietary Factors on Serum and Egg Yolk Cholesterol Levels of Laying Hens

Sim, J. S.; Bragg, D. B.

doi:10.3382/ps.0561616

Cited by 37 publications

(18 citation statements)

References 32 publications

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“…These results and those of Clarenburg et al (1971) suggest that the functional site of plant sterols in regulating cholesterol metabolism in the fowl is not restricted to the absorptive site and, in fact, these sterols may exert their effect via an enhanced rate of cholesterol turnover and excretion via bile rather than influencing cholesterol absorption. The 30% reduction in yolk cholesterol levels observed by Sim and Bragg (1977) and Clarenburg et a/. (1971) is encouraging but, again, probably not significant in practical terms to the industry.…”

Section: Nutrient Effectsmentioning

confidence: 69%

“…The evidence (Clarenburg et al, 1977) that beta-sitosterol lowers egg yolk cholesterol levels when added with or without dietary cholesterol, and is found in the egg yolk, suggests that the absorptive site is not the sole point of plant sterol action. Sim and Bragg (1977) found a significant reduction in cholesterol levels in both serum and egg yolk (ranging from 16-33% depending upon the lipid in the diet) when 2% soysterols were added to diets containing saturated or unsaturated oil with or without cholesterol. In addition, Sim et al (1980), in a study examining sterol retention and fecal excretion rates, found no evidence to indicate that dietary plant sterols interfere with cholesterol absorption and that plant sterols were absorbed at a rate equivalent to cholesterol.…”

Section: Nutrient Effectsmentioning

confidence: 96%

“…Plant sterols have also been studied for their effects on cholesterol metabolism in chicks (Peterson, 1951;Reiner etal., 1962;Pick etal., 1965;Bartovetal., 1969) andin hens (Weiss et al, 1967a;Sim and Bragg, 1977). Weiss et al (1967a) reported that the addition of 1 .O% beta-sitosterol to a low-fat basal diet had no effect except to retard the rise of cholesterol in blood and egg yolk caused by addition of dietary cholesterol.…”

Section: Nutrient Effectsmentioning

confidence: 96%

See 2 more Smart Citations

Modifying egg yolk cholesterol in the domestic fowl—a review

Hargis¹

1988

World's Poultry Science Journal

146

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Section: Nutrient Effectsmentioning

confidence: 69%

Section: Nutrient Effectsmentioning

confidence: 96%

Section: Nutrient Effectsmentioning

confidence: 96%

See 1 more Smart Citation

Modifying egg yolk cholesterol in the domestic fowl—a review

Hargis¹

1988

World's Poultry Science Journal

146

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“…No entanto, o mecanismo pelo qual a redução dos teores de colesterol foi obtida permanece desconhecido. Sim & Bragg (1977), Holland et al (1980), Hargis et al (1991) e Mori et al (1999) descreveram que a inclusão de óleos vegetais ricos em ácidos graxos poliinsaturados na ração de poedeiras pode reduzir a concentração de colesterol na gema e no plasma. No entanto, os resultados encontrados na literatura são contraditórios (Costa et al, 2008).…”

Section: Introductionunclassified

Avaliação de óleos, carvão vegetal e vitamina E no desempenho e nas concentrações lipídicas do sangue e dos ovos de poedeiras

Fanchiotti¹,

Moraes²,

Barbosa³

et al. 2010

R. Bras. Zootec.

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RESUMO -Foram estudados os efeitos de duas fontes de óleo vegetal, de carvão e de vitamina E sobre o desempenho e os níveis lipídicos do sangue e dos ovos de poedeiras comerciais. Utilizaram-se poedeiras Lohmann Brown e Lohmann LSL com 58 semanas de idade. O experimento teve duração de 84 dias, divididos em três períodos de 28 dias, e foi realizado em delineamento inteiramente casualizado em esquema de parcelas subdivididas, tendo nas parcelas um esquema fatorial 8 × 2, com oito dietas e duas marcas comerciais, e nas subparcelas os períodos. Para avaliação das características produtivas, colesterol total, triglicérides e HDL sanguíneos, utilizaram-se quatro repetições de seis aves por unidade experimental e, para determinação do colesterol total das gemas, duas repetições. As dietas foram acrescidas de 2,0% de óleo de soja ou de linhaça em combinação ou não com vitamina E (60 mg/kg de ração) e/ou carvão (2,0%). Os resultados não evidenciaram diferenças entre as dietas experimentais sobre as variáveis de desempenho. Consumo de ração, espessura da casca, colesterol total e triglicerídios no sangue foram influenciados pelas marcas comerciais e peso médio dos ovos, espessura da casca, colesterol total e triglicerídios no sangue, pelos períodos experimentais. O uso de óleos vegetais, carvão e vitamina E nas dietas experimentais não influencia as características de desempenho nem o perfil lipídico do sangue e de colesterol total da gema dos ovos. Aves Lohmann LSL apresentam maiores consumos de ração e níveis mais altos de colesterol e triglicérides no sangue.Palavras-chave: características produtivas, gema, lipídios sanguíneos Evaluation of oil, vegetal charcoal and E vitamin on performance and on blood and egg lipid concentrations of laying hens ABSTRACT -This experiment was carried out to evaluate the effects of two vegetal oils sources, charcoal and vitamin E on performance and lipid levels in blood and eggs of commercial laying hens. It was used Lohman Brown and Lohman LSL laying hens at 58 weeks of age. The experiment lasted 84 days split in three 28-day periods and it was carried out in a complete random design in a split-plot scheme, in a 8 × 2 factorial scheme in the plots with eight diets an two commercial brands, and the periods in the subplots. For evaluation of productive characteristics, total cholesterol, blood tryclecydes and HDL, it was used four repetitions of six birds per experimental unit and, for determination of total yolk cholesterol, two repetitions were used. Diets were added with 2% soybean oil or linseed oil combined or not with E vitamin (60 mg/kg ration) and/or charcoal (2%). No diet effects on the performance variables were observed. Commercial strain effects on feed intake, shell thickness, total cholesterol and blood triglycerides and experimental period effects on egg weight, shells thickness, total cholesterol and blood triglycerides were observed. Use of vegetal oil, charcoal and vitamin E in experimental diets do not affect characteristics of performance neither blood lipid and egg ...

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“…Therefore of Abell et al (1952) excepr that the saponification at 50'C was caffied out for 120 min instead of 55 min (Sim and Bragg 1977 (Cheeke 1973).…”

mentioning

confidence: 99%