Examinando por Autor "Seoane-Collazo, Patricia"

Mostrando 1 - 2 de 2

Central nicotine induces browning through hypothalamic κ opioid receptor
(Nature, 2019) Seoane-Collazo, Patricia; Liñares-Pose, Laura; Rial-Pensado, Eva; Romero-Picó, Amparo; Moreno-Navarrete, José María; Martínez-Sánchez, Noelia; Garrido-Gil, Pablo; Iglesias-Rey, Ramón; Morgan, Donald A.; Tomasini, Naoki; Andrew Malone, Samuel; Senra, Ana; Folgueira, Cintia; Medina-Gomez, Gema; Sobrino, Tomás; Labandeira-García, José L.; Nogueiras, Rubén; Domingos, Ana I.; Fernández Real, José Manuel; Rahmouni, Kamal; Diéguez, Carlos; López, Miguel
Increased body weight is a major factor that interferes with smoking cessation. Nicotine, the main bioactive compound in tobacco, has been demonstrated to have an impact on energy balance, since it affects both feeding and energy expenditure at the central level. Among the central actions of nicotine on body weight, much attention has been focused on its effect on brown adipose tissue (BAT) thermogenesis, though its effect on browning of white adipose tissue (WAT) is unclear. Here, we show that nicotine induces the browning of WAT through a central mechanism and that this effect is dependent on the κ opioid receptor (KOR), specifically in the lateral hypothalamic area (LHA). Consistent with these findings, smokers show higher levels of uncoupling protein 1 (UCP1) expression in WAT, which correlates with smoking status. These data demonstrate that central nicotine-induced modulation of WAT browning may be a target against human obesity.
Long-term caloric restriction ameliorates deleterious effects of aging on white and brown adipose tissue plasticity
(2019-06) Corrales, Patricia; Vivas, Yurena; Izquierdo-Lahuerta, Adriana; Hornillo, Daniel; Seoane-Collazo, Patricia; Velasco, Ismael; Torres, Lucia; López, Yamila; Martínez, Carmen; López, Miguel; Ros, Manuel; Obregon, María Jesús; Medina-Gomez, Gema
Age‐related increased adiposity is an important contributory factor in the development of insulin resistance (IR) and is associated with metabolic defects. Caloric restriction (CR) is known to induce weight loss and to decrease adiposity while preventing metabolic risk factors. Here, we show that moderate 20% CR delays early deleterious effects of aging on white and brown adipose tissue (WAT and BAT, respectively) function and improves peripheral IR. To elucidate the role of CR in delaying early signs of aging, young (3 months), middle‐aged (12 months), and old (20 months) mice fed al libitum and middle‐aged and old mice subjected to early‐onset CR were used. We show that impaired plasticity of subcutaneous WAT (scWAT) contributes to IR, which is already evident in middle‐aged mice. Moreover, alteration of thyroid axis status with age is an important factor contributing to BAT dysfunction in middle‐aged animals. Both defects in WAT and BAT/beige cells are ameliorated by CR. Accordingly, CR attenuated the age‐related decline in scWAT function and decreased the extent of fibro‐inflammation. Furthermore, CR promoted scWAT browning. In brief, our study identifies the contribution of scWAT impairment to age‐associated metabolic dysfunction and identifies browning in response to food restriction, as a potential therapeutic strategy to prevent the adverse metabolic effects in middle‐aged animals.