Aspectos histológicos e ultraestruturais da língua em ratos desnutridos

Abstract

There are few published studies on the effects of proteincaloric undernourishment on the oral mucosa. Objectives: The objective of this study is to verify the histological and ultrastructural aspects of the tongue mucosa in protein-caloric undernourished adult rats. Material and Methods: A clinical experimental study was done in thirty Wistar rats, 15 controls and 15 with protein-caloric undernourishment. The last group received ration in small amounts, with a reduced casein content, during 45 days. Rats were weighed every 3 days, from the first (90 days of life) to the last day of a 45-day dietary period, when they were sacrificed. Plasma was used for protein electrophoresis and their tongues were prepared for light and scanning electron microscopy. Analysus of variance and Student's t-test were used for statistical analysis. Results: A significant decrease in weight and in plasma proteins was found in protein-caloric undernourished rats compared to the control group. Histological findings revealed no differences between the two groups and there were no statistically significant differences in the filiform papilla count under the scanning electron microscopy. Conclusion: Protein-caloric undernourishment does not cause alterations in the tongue mucosa of adult rats.

Macroscopic and microscopic analysis of the tongue of the common opossum (Didelphis marsupialis)

“…This is similar to the morphologies of other small mammals (Abreu et al, 2006;Branco et al, 2011Branco et al, , 2012Chamorro et al, 1987;Ciuccio et al, 2008Ciuccio et al, , 2010Martinez et al, 1998;Watanabe et al, 1988Watanabe et al, , 2009 (Table 2).…”

“…The diet of a widely distributed species may vary between different biomes or habitats (Lessa and Geise, 2010). The distributions of the fungiform and filiform papillae observed in this study are similar to those described (Chamorro et al, 1987) 1 2 1 1 6 1 2 Zaedyus pichiy (Ciuccio et al, 2008) 1 2 2 1 2 2 2 Tayassu pecari (Watanabe et al, 2009) 1 2 2 1 2 2 2 Dasypus hybridus (Ciuccio et al, 2010) 1 2 2 1 2 2 2 Sotalia guianensis (Guimarães et al, 2011) 1 2 1 2 2 2 2 Saimiri sciureus (Branco et al, 2011) 1 2 2 1 1 1 2 Callithrix penicillata (Branco et al, 2012) 1 2 2 1 3 2 2 in species with different feeding habits, such as rabbits, cats, horses, llamas, rats, armadillos, peccaries, and primates (Abreu et al, 2006;Banks, 1991;Branco et al, 2011Branco et al, , 2012Chamorro et al, 1987;Ciuccio et al, 2008Ciuccio et al, , 2010Martinez et al, 1998;Watanabe et al, 1988Watanabe et al, , 2009 (Table 2). The marginal fungiform papillae surrounding the posterolateral folds and tongue tip are unique to opossums and have not been described in other land mammals.…”

“…The dietary habits of species are directly related to tongue texture, which is determined by an assemblage of different types of papillae (Abreu et al, 2006;Branco et al, 2012;Ciuccio et al, 2008). There are several functional types of lingual papillae, such as the mechanical papillae (filiform, conical, and marginal) and the gustatory papillae (vallate, fungiform, and foliated) (Branco et al, 2011;Okada and Schraufnagel, 2005).…”

Estudo do paladar para diferentes aminoácidos no rato saudável e no rato desnutrido

“…É uma substância glicogênica, devido ao fato de ser convertida em succinil-CoAintermediário do ciclo de Krebs (ROGERO et al, 2008). A lisina, outro aminoácido essencial, é um nutriente importante na suinocultura por sua constância na proteína corporal, e por sua destinação metabólica preferencial para a deposição de tecido magro (ABREU et al, 2006). Em estudos experimentais com animais, a desnutrição protéica acarretou na redução do peso corporal e em determinadas alterações no desenvolvimento normal, como a memória (SILVA et al, 2006).…”