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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2007 > Volume 6 Number 1 > A.V. Fischer da Silva1, A. Maiorka1, S.A. Borges2, E. Santin1, I.C. Boleli3 and M. Macari3

Surface Area of the Tip of the Enterocytes in Small Intestine Mucosa of Broilers Submitted to Early Feed Restriction and Supplemented with Glutamine

A.V. Fischer da Silva1, A. Maiorka1, S.A. Borges2, E. Santin1, I.C. Boleli3 and M. Macari3
1Universidade Federal do Paranل, Centro Politécnico, Setor de Ciências Biolَgicas, Departamento de Fisiologia, Endereço: Rua Francisco H. dos Santos, sn, Jardim das Américas, 81530-000 Curitiba, PR Brasil 2Faculdade de Ciências Biolَgicas e de Saْde - Universidade Tuiuti do Paranل - UTP 3Departamento de Morfologia, FCAV/UNESP, Jaboticabal, Brazil
Abstract :

A total of 640 one-day-old male Cobb chicks were used to evaluate the effects of early feed restriction and glutamine on villi density and tip surface of enterocytes in the small intestine of broilers. A twofactor
factorial experimental design with glutamine and feed restriction as main factors was used. Treatments consisted of quantitative feed restriction at 30% of ad libitum intake from 7 to 14 days of age, and glutamine addition at 1% in the diet from 1 to 28 days of age. Sections of the small intestine (duodenum, jejunum, ileum) were collected at 14 and 21 days of age for analyses by scanning and transmission electron microscopy. Villi density decreased with age and increased in cranial-caudal direction. Glutamine  increased villi density in the small intestine. Microvilli density and height decreased with age. Glutamine increased microvilli width. The jejunum was the segment with the largest surface area of the tip of the enterocytes, followed by the duodenum and the ileum. Feed restriction decreased the surface area of the tip of the enterocytes in the small intestine at 14 and at 21 days of age. Glutamine supplemented in the feed increased the surface area of the tip of the enterocytes of the jejunum and ileum at 21 days of age.

Keywords :
Electron microscopy, feed restriction, glutamine, intestinal mucosa, microvilli amplification factor

Date Deposited : 14 Jul 2011 10:53

Last Modified : 14 Jul 2011 10:53

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 6, Number 1, - 2007 , ISSN 1682-8356

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