Une alimentation maternelle enrichie en gras pendant la gestation et l’allaitement oriente le nouveau-né vers un lait produit sous régime gras (modèle murin)

Exploration of neuronal and glial plasticity in the melanocortin system at the meal in a mouse model.

In 2015, Nature published the largest pangenomic association study to date linking genetic variants to body mass index. This study highlighted the role of the central nervous system in vulnerability to obesity and supports an original concept that cerebral plasticity plays an important role in the control of energy balance. Thus, reduced cerebral plasticity capacities could lead to inadequate dietary behaviors, which would increase the risk of weight gain under caloric pressure. The anorectic neurons POMC and the orexigenic neurons AgRP of the melanocortin system, which control the energy balance, actually show synaptic plasticity properties in the adult brain. These phenomena are shown in …

Une alimentation maternelle enrichie en gras pendant la gestation ou l’allaitement oriente les préférences du souriceau vers un aliment gras à la naissance et au sevrage

Brain Control of Plasma Cholesterol Involves Polysialic Acid Molecules in the Hypothalamus

IF 3.566; International audience; The polysialic acid (PSA) is a large glycan that is added to cell-surface proteins during their post-translational maturation. In the brain, PSA modulates distances between cells and controls the plasticity of the nervous system. In the hypothalamus, PSA is involved in many aspects of energy balance including food intake, osmoregulation, circadian rhythm, and sleep. In this work, we investigated the role of hypothalamic PSA in the regulation of plasma cholesterol levels and distribution. We report that HFD consumption in mice rapidly increased plasma cholesterol, including VLDL, LDL, and HDL-cholesterol. Although plasma VLDL-cholesterol was normalized withi…