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The effects of melatonin daily supplementation to aged rats on the ability to withstand cold, thermoregulation and body weight.
Mendes, Caroline; Gomes, Guilherme; Belpiede, Luciana Tocci; do Carmo Buonfiglio, Daniella; Motta-Teixeira, Lívia Clemente; Amaral, Fernanda Gaspar; Cipolla-Neto, José.
Afiliação
  • Mendes C; Neurobiology Lab, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
  • Gomes G; Department of Physics and Interdisciplinary Science (FCI), São Carlos Institute of Physics (IFSC), University of São Paulo, São Paulo, Brazil.
  • Belpiede LT; Neurobiology Lab, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
  • do Carmo Buonfiglio D; Morehouse School of Medicine, Department of Pharmacology and Toxicology, Atlanta, GA, USA.
  • Motta-Teixeira LC; Neurobiology Lab, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
  • Amaral FG; Pineal Neurobiology Lab, Department of Physiology, Federal University of São Paulo, São Paulo, SP, Brazil.
  • Cipolla-Neto J; Neurobiology Lab, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil. Electronic address: cipolla@icb.usp.br.
Life Sci ; 265: 118769, 2021 Jan 15.
Article em En | MEDLINE | ID: mdl-33309717
AIMS: Investigate the role of melatonin on the regulation of body temperature in aged animals that have impaired melatonin production. MATERIAL AND METHODS: Aged Male Wistar rats were randomly assigned to the following groups: 1) control (vehicle added to the water bottles during the dark phase) and 2) melatonin-treated (10 mg/kg melatonin added to the water bottles during the dark phase). Before and after 16 weeks of vehicle or melatonin treatment, control group and melatonin-treated animals were acutely exposed to 18 °C for 2 h for an acute cold challenge and thermal images were obtained using an infrared camera. After 16 weeks, animals were euthanized and brown and beige adipocytes were collected for analysis of genes involved in the thermogenesis process by real-time PCR, and the uncoupling protein expression was evaluated by immunoblotting. Browning intensity of beige adipocytes were quantified by staining with hematoxylin-eosin. KEY FINDINGS: Chronic melatonin supplementation induced a minor increase in body mass and increased the animal's thermogenic potential in the cold acute challenge. Brown and beige adipocytes acted in a coordinated and complementary way to ensure adequate heat production. SIGNIFICANCE: Melatonin plays an important role in the thermoregulatory mechanisms, ensuring greater capacity to withstand cold and, also, participating in the regulation of energy balance.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Regulação da Temperatura Corporal / Peso Corporal / Suplementos Nutricionais / Resposta ao Choque Frio / Melatonina Limite: Animals Idioma: En Revista: Life Sci Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Regulação da Temperatura Corporal / Peso Corporal / Suplementos Nutricionais / Resposta ao Choque Frio / Melatonina Limite: Animals Idioma: En Revista: Life Sci Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda