Effects of protein malnutrition on muscle fibers of the brachial biceps and medial pterygoid of Wistar rats
Braz. j. morphol. sci
;
28(3): 196-203, July-Sept. 2011. ilus, graf
Article
Dans Anglais
| LILACS
| ID: lil-644135
ABSTRACT
Protein malnutrition is a public health problem, and in childhood, it can lead to muscle deficits. Here, our objective was to evaluate the effects of malnutrition upon the muscle fibers in the medial pterygoid and braquial biceps. Ten just weaned rat pups that had been born to parents fed a nourished or malnourished diet (N = 5 per group) were studied. The medial pterygoid and braquial biceps muscles were removed and crosssectioned, and histological staining with picrosirius and histochemistry reaction with nicotinamide adenine dinucleotide - tetrazolium reductase (NADH-tr) were performed. The samples stained with picrosirius were observed under polarized light, and from the qualitative analysis, we observed that type I collagen fibers were only present in the braquial biceps muscles of the nourished animals. The NADH-tr reaction indicated that the pterygoid muscle specimens from the malnourished pups lacked intermediate muscle fibers. The crosssectional area of the muscle was lower in the malnourished group than in the nourished group. The density of muscle fibers was higher in the malnourished group than in the nourished group. The consequences of malnutrition were visible when comparing the muscles. We concluded that the differences in daily muscle action along with the differences in embryological origin are instrumental in establishing the results.
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Indice:
LILAS (Amériques)
Sujet Principal:
Carence protéique
/
Muscles squelettiques
/
Développement musculaire
/
Malnutrition
Type d'étude:
Recherche qualitative
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Braz. j. morphol. sci
Thème du journal:
Anatomie
Année:
2011
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Federal University of São Paulo/BR
/
University of São Paulo/BR
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