A tryptophan-enriched diet improves feed intake and growth performance of susceptible weanling pigs orally challenged with Escherichia coli K881

Trevisi, Paolo; Melchior, D.; Mazzoni, Maurizio; Casini, L.; Filippi, Sara; Minieri, L.; Lalatta-Costerbosa, Giovanna; Bosi, Paolo

doi:10.2527/jas.2007-0732

Cited by 73 publications

(64 citation statements)

References 17 publications

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“…The amino acid demands of pigs can be affected by different factors such as ambient temperature and immune challenge levels (Williams et al, 1997;Braumann et al, 2002;LeFloc'h et al, 2004;Trevisi et al, 2009). Besides these factors, the inconsistency in the daily weight gain response resulting from the lysine levels observed among the studies may be related to differences in the genetic potential for lean gain of pigs.…”

Section: Ingredientmentioning

confidence: 99%

Digestible lysine for barrows of genetic lines selected for meat deposition from 60 to 100 days of age

Haese¹,

Donzele²,

Oliveira³

et al. 2011

R. Bras. Zootec.

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-In order to evaluate the effects of dietary digestible lysine levels on performance and carcass traits of two genetic lines of pigs selected for meat deposition, from 60 to 100 days of age, a total of 120 crossbred barrows, with initial average body weight of 25.42 ± 2.08 kg were used. Pigs were allotted in a complete randomized block design, within a 4 × 2 factorial arrangement (four digestible lysine levels: 0.90, 1.00, 1.10, and 1.20%, and two genetic lines: A and B), with five replicates and three pigs per pen, which was the experimental unit. There was no interaction between genetic and digestible lysine levels for any variable of performance and carcass traits assessed. There was also no effect of digestible lysine levels in feed intake, body weight gain, and feed conversion. Digestible lysine intake of pigs increased linearly with increasing digestible lysine levels in the diets. Except for carcass yield that increased quadratically up to 1.04% estimate level of digestible lysine, there was no effect of lysine levels on the other carcass traits assessed (loin and ham yield, and amount of meat in the carcass).The digestible lysine level of 0.90%, corresponding to an estimated daily intake of 19.10 g, meets the requirements of castrated male pigs selected for meat deposition from both genetic lines, from 60 to 100 days of age.

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Section: Ingredientmentioning

confidence: 99%

Digestible lysine for barrows of genetic lines selected for meat deposition from 60 to 100 days of age

Haese¹,

Donzele²,

Oliveira³

et al. 2011

R. Bras. Zootec.

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“…Dessa forma, a eficiência alimentar entre animais com sistema imune ativado, por meio de antígenos vacinais e o grupo controle foi semelhante. Resultados semelhante foi encontrado por Van Heutgen et al (1994). Entretanto, Stahly et al (1996) verificaram efeito da ativação do sistema imune sobre a conversão alimentar.…”

Section: Introductionunclassified

Níveis de metionina + cistina para leitões dos 6 aos 16 kg submetidos a diferentes graus de ativação do sistema imune

Silva

Pinheiro

Fontes

et al. 2015

Rev. bras. saúde prod. anim.

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RESUMOO experimento foi realizado com o objetivo de avaliar os efeitos dos níveis de metionina + cistina da dieta sobre o desempenho, características de carcaça e a resposta imunológica de leitões recém-desmamados. Foram utilizados 360 leitões, 180 machos e 180 fêmeas, desmamados com idade média de 18,8 dias e peso inicial de 5,43 ± 1,17kg. Foi utilizado o delineamento de blocos ao acaso em esquema fatorial 5x2, com cinco níveis de metionina + cistina total (0,70; 0,77; 0,85; 0,93 e 1,01%) e duas formas de ativação do sistema imune (vacinados e não vacinados), quatro repetições e nove animais por unidade experimental. Não houve interação entre os níveis de metionina+cistina e o grau de ativação do sistema imune dos animais para todos os parâmetros avaliados. A ativação do sistema imune reduziu em 7% o consumo de ração e em 5% no ganho de peso diário dos animais. Os níveis de metionina + cistina melhoraram de forma linear a conversão alimentar e a deposição de proteína diária na carcaça à medida que o nível dos aminoácidos sulfurados aumentou nas dietas. Suínos dos seis aos 16kg, independente da ativação do sistema imune, exigem 0,90% de metionina + cistina total, o que corresponde a um consumo diário de metionina + cistina de 4,44 g/dia e uma relação de 58% metionina+cistina:lisina. Palavras-chave:aminoácidos, deposição proteica, imunidade, proteína ideal SUMMARYThis study was conducted to evaluate the effects of dietary methionine + cystine levels on performance, carcass characteristics and immune response of weanling pigs. It was used 360 piglets, 180 males and 180 females, weaned at 20.3 days of age and initial weight of 5.43 ± 1.17kg. Was used the experimental design of randomized blocks in a 5x2 factorial design, with five levels of total methionine + cystine (0.70; 0.77; 0.85; 0.93 e 1.01%) and two forms of immune system activation (vaccinated and unvaccinated), with four replications and nine animals per experimental unit. There was no interaction between the methionine + cystine levels and the degree of activation of the immune system of animals for all parameters evaluated. The immune system activation decreased by 7% feed intake and 5% in daily weight gain of the animals. Methionine and cystine levels linearly improved feed conversion and daily protein deposition on the carcass as the level of sulfur amino acids in the diets increased. Pigs from six to 16 kg, independent of immune system activation, require 0.90% of total methionine + cystine, which corresponds to a daily intake of methionine + cystine 4.44 g/day and a ratio of 58% methionine + cystine: lysine.

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“…Nevertheless, an improvement in growth rate by additional tryptophan was observed in pigs suffering from a moderate inflammation compared with control pigs (91) . Additional tryptophan allowed pigs to partially compensate for the effects of an Escherichia coli infection by increasing feed intake and maintaining growth (92) . These results suggest that dietary tryptophan should be maintained at an adequate level to preserve health during critical phases of pig rearing.…”

Section: Control Of Inflammatory Response: Tryptophanmentioning

confidence: 99%

Towards amino acid recommendations for specific physiological and patho-physiological states in pigs

et al. 2012

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The objective of this review is to provide an overview of the implication of amino acids (AA) in important physiological functions. This is done in the context of pig production where the competition for AA utilisation is exacerbated by constraints to maximise productive responses and the necessity to reduce dietary protein input for environmental, economic and sanitary issues. Therefore, there is an opportunity to refine the nutritional recommendations by exploring the physiological roles of AA. For example, methionine and cysteine, either in selenised or sulfur forms, are directly involved in the regulation of the glutathione antioxidative system. In sows, glutathione antioxidative system may contribute to improving ovulation conditions through control of oxidative pressure. Supplementation of sow diets withl-arginine, a precursor of NO and polyamines, may stimulate placental growth, promoting conceptus survival, growth and tissue development. The beneficial effect of arginine supplementation has been also suggested to improve lactation performance. Feed intake is usually the first response that is impacted by an inadequate AA supply. Valine and tryptophan imbalances may act as signals for decreasing feed intake. AA are also important nutrients for maintaining the animal's defence systems. Threonine, one of the main constituents of mucin protein, is important for gut development during the postnatal period. It may exert a protective effect that reduces the impact of weaning on gut morphology and associated disturbances. Finally, tryptophan is involved in the regulation of the defence system through its action as a precursor of antioxidants and its effect on the inflammatory response.

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A tryptophan-enriched diet improves feed intake and growth performance of susceptible weanling pigs orally challenged with Escherichia coli K881

Cited by 73 publications

References 17 publications

Digestible lysine for barrows of genetic lines selected for meat deposition from 60 to 100 days of age

Digestible lysine for barrows of genetic lines selected for meat deposition from 60 to 100 days of age

Níveis de metionina + cistina para leitões dos 6 aos 16 kg submetidos a diferentes graus de ativação do sistema imune

Towards amino acid recommendations for specific physiological and patho-physiological states in pigs

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