Receptor solúvel de leptina e índice de leptina livre em trabalhadores em turnos

• Ano de defesa: 2016
• Autor(a) principal: Cunha, Clarissa Lôbo Portugal da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Ciências da Saúde; Ciências da Saúde; UFU
• Palavras-chave em Português: Trabalho em turnos; Receptor solúvel de leptina; Índice de leptina livre; Ciências Médicas; Hormonios peptidio - Efeito fisiologico; Leptina; Mobilidade de pessoal; Shift work; Soluble leptin receptor; Free leptin index; CNPQ::CIENCIAS DA SAUDE
• Link de acesso: https://repositorio.ufu.br/handle/123456789/12860; http://doi.org/10.14393/ufu.di.2016.127

Concentrations of leptin - a hormone that contributes importantly to the central regulation of food intake - seem to be influenced by the shift work schedule. Soluble leptin receptors (OB-Re) are the major leptin-binding protein in blood and can affect leptin transport in the brain. As the daily concentrations of OB-Re have not been described in shift workers, we hypothesized that OB-Re concentrations and the free leptin index (FLI) do not vary throughout the day in shift workers as they do in day workers. To evaluate the daily profiles of OB-Re and FLI in shift and day workers, two shift-working groups (early morning and night shifts) and one group of day-shift workers were studied. They completed sleep, nutritional and metabolic assessments. Venous blood samples were collected every 4 hours over 24 hours to measure leptin and OB-Re levels. FLI was calculated by the ratio of free leptin to OB-Re levels. The Mixed-model ANOVAs indicated that OB-Re showed a significant main effect of shift, with the day workers showing higher OB-Re levels than the early morning (p=0,001) and night (p=0,004) groups. No effect of time or interaction between time x shift was observed in OB-Re. No main effect of shift, time or interaction between shift x time was observed for FLI (p>0.05). No significant differences were observed in mean 24-hours concentrations of Ob-Re and FLI between shift and day workers (p>0.05). We conclude that the concentration of OB-Re is altered by working on atypical schedules (early morning and night shifts) compared to day shifts.