Reduction of liver mass due to malnutrition in rats: correlation with emaciation of animals and size of organs not inserted in the portal system
Palavras-chave:
Atrophy, Liver, Glucagon, Insulin, Liver regeneration, Malnutrition, StarvationResumo
OBJETIVOS: Estudar em ratos, a repercussão da desnutrição calórico-protéica na morfologia hepática, comparativamente com o emagrecimento dos animais e com a redução do tamanho de órgãos não irrigados por sangue esplâncnico como rins e baço. MATERIAL E MÉTODOS: Em dois grupos de ratos, um alimentado "ad libitum" e outro sem alimento, só com água por 7 dias, foram deteminadas as modificações no peso dos animais, nas massas do fígado, rins e baço, proteína, DNA e relação proteína/DNA no tecido hepático e tamanho dos hepatócitos. RESULTADOS: Foi observado que o fígado diminuiu de massa (27,41%) em proporção significantemente maior (p<0,05) que o emagrecimento corpóreo (19,22%). Rins e baço tiveram suas massas reduzidas em 18,68% e 24,28%, respectivamente, semelhante à diminuição do peso corpóreo. A redução da massa hepática ocorreu por hipoplasia e atrofia, respectivamente diminuição no número e no tamanho dos hepatócitos. CONCLUSÃO: Concluiu-se que existe um consumo preferencial de proteína hepática na desnutrição calórico-protéica que poderia eventualmente resultar da ação aditiva dos efeitos do consumo geral de reservas orgânicas pela desnutrição em si e da redução do estímulo hepatotrófico.
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