A expressão da isoforma de calpastatina responsiva à ractopamina altera a maciez da carne, com implicações na eficiência de crescimento de suínos

Leonardo, Eric Franchi

doi:10.11606/t.11.2008.tde-16072008-140820

Cited by 4 publications

(6 citation statements)

References 18 publications

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“…The increase in the shear force of animals that consume ractopamine can be explained by the increase in the gene expression of calpastatin [ 28 ], which reinforces the results found in our work, whereupon the animals supplemented with ractopamine presented a greater shear force.…”

Section: Discussionsupporting

confidence: 90%

“…Leonardo [ 28 ] did not observe an effect of ractopamine on initial and final pH on the animal carcass, nor did he observe any difference between sex. In a study carried out by Oliveira [ 29 ], animals that consumed 10 ppm of ractopamine for 28 days showed no difference in initial pH; males consuming ractopamine had a lower pH compared to females after 24 h.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of a Phytogenic Compound with Minerals as a Possible Alternative to Ractopamine for Finishing Pigs

Moreira

Garbossa

Guimarães

et al. 2022

Animals

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The objective of this work was to evaluate the effect of a phytogenic compound for pigs in the growing and finishing phases as a possible substitute for ractopamine. A total of 140 pigs with an average initial weight of 48.8 kg ± 5.9 kg were used, distributed in a randomized block design, in a 3 × 2 factorial scheme (control diet (CONT), diet with inclusion of 2.5 kg per ton of a phytogenic compound (PC), and diet with 10 ppm of ractopamine (RAC), and two sexes: gilts and barrows), distributed in eight pens per treatment. The performance parameters were measured, and, at the end of the experimental period, the animals were slaughtered for carcass characteristics and pork quality analysis. The animals consuming RAC showed a better feed conversion, 4% improvement in relation to the group with the PC (p < 0.05). For daily weight gain, the animals supplemented with the PC showed 4.46% lower gain compared to RAC, and 3% greater gain compared to the CONT (p < 0.05). The animals that consumed the PC showed 5.6% lower shear force of the pork (p < 0.05) in relation to the CONT group and 29% lower in relation to the RAC group. The TBARS value presented a significant difference (p < 0.05), the CONTT group was 29% higher than the RAC, and the PC was 15.5% higher than the RAC. For chroma, the pork of the RAC group was 14% lower than the CONTT group and 10.3% less than the PC. There was no significant difference for the carcass parameters. It was concluded that the pigs in the ractopamine group presented the best performance; however, the phytogenic compound can be used against ractopamine’s restriction because it improves daily weight gain and promotes a softer and less pale meat when compared with ractopamine.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Evaluation of a Phytogenic Compound with Minerals as a Possible Alternative to Ractopamine for Finishing Pigs

Moreira

Garbossa

Guimarães

et al. 2022

Animals

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“…Xiong et al (2006) (Xiong et al, 2006;Fernández-Dueñas et al, 2008;Leonardo, 2008;Athayde et al, 2012). A ractopamina altera a proporção de fibras musculares, em especial a miosina de cadeia pesada; e o efeito de repartição induzida por agonistas β-adrenérgicos é, em parte, mediado pela alteração da expressão de genes específicos para o tipo de fibra muscular, por meio do receptor B (Gunawan et al, 2007).…”

Section: Resultsunclassified

“…A ractopamina altera a proporção de fibras musculares, em especial a miosina de cadeia pesada; e o efeito de repartição induzida por agonistas β-adrenérgicos é, em parte, mediado pela alteração da expressão de genes específicos para o tipo de fibra muscular, por meio do receptor B (Gunawan et al, 2007). Essas modificações alteram a qualidade da carne, especialmente a maciez, pois a ractopamina age sobre a expressão de isoformas de calpastatina (Leonardo, 2008), um inibidor natural do processo de amaciamento da carne, o que reduz a maciez pela diminuição da proteólise post mortem (Xiong et al, 2006).…”

Section: Resultsunclassified

Imunocastração e ractopamina na qualidade de lombos suínos processados com sal e tripolifosfato

Iocca

Lucas

Fausto

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da imunocastração e da suplementação com ractopamina na qualidade do lombo suíno processado com sal e tripolifosfato de sódio. Os tratamentos consistiram de condição sexual dos suínos (fêmeas, machos castrados fisicamente e imunocastrados) e suplementação ou não com ractopamina na dieta de terminação. Os cortes de lombos submetidos ao processamento com tripolifosfato de sódio e sal foram avaliados quanto aos parâmetros físico-químicos, microbiológicos e sensoriais. Não houve interação entre condição sexual e ractopamina nas características do lombo cru. A adição de ractopamina na dieta aumentou a força de cisalhamento dos lombos crus. Também não houve efeito da condição sexual nem da ractopamina na perda de peso por exsudação e no teor proteico dos lombos. Lombos de animais imunocastrados apresentaram menor perda de peso por cocção, enquanto lombos de animais não suplementados com ractopamina apresentaram maior umidade do que os dos suplementados. O processamento diminuiu a força de cisalhamento dos cortes, que foi menor nos animais imunocastrados sem suplementação com ractopamina. A imunocastração proporcionou lombos com altos valores de a* e L*. Diferenças na aparência e na textura dos lombos suínos, independentemente da condição sexual e da ractopamina, não são percebidas pelos consumidores, o que mostra que o processamento padroniza os cortes.Termos para indexação: agonista β-adrenérgico, bem-estar animal, gonadotropina, marinação por injeção, qualidade de carne, tripolifosfato de sódio. Immunocastration and ractopamine in the quality of pork loin enhanced with salt and tripolyphosphateAbstract -The objective of this work was to evaluate the effect of immunocastration and supplementation with ractopamine in the quality of pork loin enhanced with salt and sodium tripolyphosphate. Treatments consisted of the sexual condition of the swine (females, physically castrated and immunocastrated males) and supplementation or not with ractopamine in finishing diet. The loins subjected to the enhancement with sodium tripolyphosphate and salt were evaluated as to physical-chemical, microbiological, and sensory parameters. There was no interaction between sexual condition and ractopamine on fresh pork loin characteristics. The addition of ractopamine in the diet increased the shear force in fresh loins. There was also no effect of sexual condition nor of ractopamine in purge loss and loin protein content. Loins of immunocastrated animals had less weight loss by cooking, whereas loins of animals non-supplemented with ractopamine showed higher moisture than those supplemented. Enhancement decreases the shear force of the cuts, which was lower in the immunocastrated animals without ractopamine supplementation. Immunocastration provided pork loins with high a* and L* values. Differences in the appearance and texture of pork loins, regardless of sexual condition and ractopamine, are not perceived by consumers, showing that enhancement standardizes the cuts.Index terms: β-a...

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“…Autores como Honikel et al (1986) Estudos reportaram uma relação inversa da maciez da carne e suplementação das dietas com ractopamina (JONES et al, 1985;WALKER et al, 1989;WARRISS et al,1990;UTTARO et al, 1993;CARR et al, 2005;XIONG et al, 2006;FERNÁNDEZ-DUEÑAS et al, 2008;LEONARDO, 2008).…”

Section: Vol_n_b1unclassified

Efeito da adição de ractopamina e da imunocastração na carne <i>in natura</i> de suínos

Oliveira¹

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A expressão da isoforma de calpastatina responsiva à ractopamina altera a maciez da carne, com implicações na eficiência de crescimento de suínos

Cited by 4 publications

References 18 publications

Evaluation of a Phytogenic Compound with Minerals as a Possible Alternative to Ractopamine for Finishing Pigs

Evaluation of a Phytogenic Compound with Minerals as a Possible Alternative to Ractopamine for Finishing Pigs

Imunocastração e ractopamina na qualidade de lombos suínos processados com sal e tripolifosfato

Efeito da adição de ractopamina e da imunocastração na carne <i>in natura</i> de suínos

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