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- W2029484870 abstract "Le poids est l’un des facteurs prédictifs les plus forts du statut osseux et la graisse joue un rôle significatif dans les effets protecteurs induits par le poids sur l’os. Aussi, comprendre les mécanismes sous-tendant les relations entre graisse et os est d’une grande importance, avec d’éventuelles implications thérapeutiques. À côté de son rôle dans la régulation de l’appétit et des dépenses énergétiques corporelles, la leptine pourrait être un des médiateurs impliqués dans ces mécanismes. Des résultats parfois contradictoires soutiennent cette hypothèse et suggèrent que la leptine puisse exercer des effets négatifs sur la formation osseuse via le système nerveux central alors que ses effets périphériques directs sur les cellules précurseurs stromales stimulent la formation et inhibent la résorption osseuse. La résultante de ces deux voies d’action pourrait dépendre notamment des taux sériques de leptine et de la perméabilité de la barrière hémato-méningée, les premiers augmentant et la seconde diminuant parallèlement à l’installation de l’obésité. Des travaux ultérieurs apparaissent donc nécessaires pour comprendre plus complètement ces effets. Body weight is among the most powerful predictors of bone status, and adipose tissue plays a substantial role in weight-related protective effects on bone. An understanding of the mechanisms underlying the relation between adipose tissue and bone may open up new perspectives for treatment. Leptin, which is known to regulate appetite and energy expenditures, may also contribute to mediate the effects of fat mass on bone. Although reported data are somewhat conflicting, there is some evidence that leptin may decrease bone formation via a central nervous effect and may stimulate both bone formation and bone resorption via direct peripheral effects on stromal precursor cells. The net result of these central and peripheral effects may depend on serum leptin levels and blood–brain barrier permeability, of which the first increase and the second decrease as obesity develops. Further work is needed to improve our understanding of these effects." @default.
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- W2029484870 title "La leptine : un médiateur potentiel des effets protecteurs de la masse grasse sur le tissu osseux" @default.
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