Enrichment of the amnion with threonine in chicken embryos affects the small intestine development, ileal gene expression and performance of broilers between 1 and 21 days of age.

Autor:	Moreira Filho ALB; Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, PB, 58397-000, Brazil., Ferket PR; Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, 27695-7608, USA., Malheiros RD; Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC, 27695-7608, USA., Oliveira CJB; Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, PB, 58397-000, Brazil., Aristimunha PC; Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil., Wilsmann DE; Departamento de Medicina Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, 90040-060, Brazil., Givisiez PEN; Departamento de Zootecnia, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, PB, 58397-000, Brazil.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2019 Mar 01; Vol. 98 (3), pp. 1363-1370.
DOI:	10.3382/ps/pey461
Abstrakt:	The effects of in ovo feeding with threonine (Thr) on intestinal morphology, ileal gene expression and performance of broiler chicken between 1 and 21 d of age (d) were assessed. On day 17.5 of incubation, fertile eggs were randomly allotted to 5 treatments of Thr injection in the amniotic fluid (0; 1.75; 3.5; 5.25; 7%, corresponding to 17.5; 35; 52.5 and 70 mg Thr/mL). After hatch, chicks were given a commercial corn-soybean diet up to 21 d. Daily feed intake (FI), body weight (BW), and food conversion ratio (FCR) were measured from 1 to 7, 14, and 21 d of age. The ileal gene expression of mucin (MUC2), peptide transporter (PepT1), and aminopeptidase enzyme (APN) were evaluated on day of hatch and at 21 d, as well as intestinal morphometric traits. In ovo feeding with threonine significantly increased final weight (FI) and weight gain (WG) and decreased FCR in the period from 1 to 21 d. Threonine levels affected beneficially the villus height, vilo: crypt ratio and villus area on day of hatch and at 21 d. At hatch, all Thr levels increased the expression of MUC2 and PepT1 compared to the control group. APN expression also increased, but for the lowest and the highest threonine levels (1.75 and 7%). At 21 d, there was no effect of threonine on the expression of MUC2, PepT1, and APN. In conclusion, in ovo threonine feeding beneficially affected the morphological and functional development of the intestinal mucosa, which ensured improved performance of chicks at hatch and at 21 d. (© 2018 Poultry Science Association Inc.)
Databáze:	MEDLINE
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