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International Journal of Morphology

versión On-line ISSN 0717-9502


FRANCO, Cássia Luiza de Marins; SANT'ANA, Débora de Mello Gonçales  y  ARAUJO, Eduardo José de Almeida. Intestinal Wall Atrophy and Increase of Sulphomucin Secretion in the Jejunal Epithelium of Rats Submitted to Severe Protein Malnutrition. Int. J. Morphol. [online]. 2010, vol.28, n.2, pp.497-502. ISSN 0717-9502.

The effects of severe protein malnutrition on the morphometry of the intestinal wall in the jejunum of adult rats were evaluated in this study. Six 90-day-old Wistar rats (Rattus norvegicus) were assigned into two groups: CG (Control Group, n = 3) and MG (Malnourished Group, n = 3). CG animals were fed a 26%-protein chow whereas controls were fed a 4%-protein chow. After 90 days, part of the jejunum was collected and subjected to routine histology. HE-staining and histochemical techniques - Periodic Acid Schiff (PAS) and Alcian Blue (AB), pH 2.5/pH 1.0 - were used for the detection of glycoconjugates in 4µm -thick transverse cuts. Morphometric analysis of the HE-stained cuts revealed a decrease of the total thickness of the jejunal wall, mostly on the following layers: external muscle and mucosa - enterocyte height also decreased. Cuts stained by using histochemical techniques for the detection of glycoconjugates revealed maintenance of goblet cells reactive to PAS and AB pH 2.5, whereas the number of cells reactive to AB pH 1.0 increased. Protein malnutrition was concluded to provoke severe atrophy of the jejunal wall and an increase of sulphomucin secretion within the intestinal epithelium.

Palabras clave : Protein-energetic malnutrition; Small intestine; Morphometry; Mucins.

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