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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2009.tde-28092009-165612
Document
Author
Full name
Ana Maria Souza Lopes
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Cipolla Neto, Jose (President)
Almeida, Valeria Cristina Santos de
Curi, Tania Cristina Pithon
Title in Portuguese
Efeitos do exercício físico sobre a atividade metabólica do tecido adiposo e muscular de ratos pinealectomizados tratados ou não com melatonina.
Keywords in Portuguese
Exercício físico
Fisiologia
Glândula pineal
Melatonina
Tecido adiposo
Tecido muscular
Abstract in Portuguese
Investigamos o efeito do exercício físico no metabolismo do tecido adiposo e muscular de ratos pinealectomizados tratados ou não com melatonina. Foram retiradas amostras de sangue, tecido adiposo peri epididimal e músculo sóleo para testes biológicos. O treinamento físico mostrou-se eficiente através do aumento da velocidade máxima, atingida no final do treinamento, e da atividade da citrato sintase no músculo. A pinealectomia alterou o padrão de mobilização e utilização dos substratos pelos adipócitos e células musculares tornando menor a adaptação dos animais ao treinamento, causando um desajuste metabólico em vários parâmetros. Quando tratados com melatonina a adaptação funcional recuperou-se plenamente, tanto no tecido adiposo como muscular. Demonstrando que a glândula pineal tem um papel na regulação do metabolismo de lipídeos e carboidratos em resposta ao treinamento físico, a remoção da glândula causa alterações na resposta adaptativa do tecido adiposo e muscular e o tratamento com melatonina reverte o desajuste metabólico instaurado pela pinealectomia.
Title in English
Effects of exercise on the metabolic activity of muscle and adipose tissue of pinealectomized rats treated or not with melatonin.
Keywords in English
Adipose tissue
Melatonin
Muscle tissue
Physical activity
Physiology.
Pineal gland
Abstract in English
The current study investigated the effect of exercise on muscle and adipose tissue metabolism melatonin treated or non treated pinealectomized rats. Blood samples, peri-epididymal adipose tissue and soleus muscle were collected for biological tests. The physical training was efficient in increasing the maximum speed reached at the end of training, and the activity of citrate synthase in muscle. Pinealectomy changed the pattern of mobilization and utilization of substrates adipocytes and muscle cells decreasing the adjustment to the training in these animals, causing a mismatch in several metabolic parameters. When treated with melatonin, the functional adaptation is fully recovered both in adipose tissue and muscle. Demonstrating that the pineal gland has a role in regulating the metabolism of lipids and carbohydrates in response to physical training, the removal of the gland caused changes in the adaptive response of adipose tissue and muscle and the treatment with melatonin reversed the metabolic mismatch introduced by pinealectomy.
 
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Publishing Date
2009-11-18
 
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