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• W1983171921 endingPage "e11361" @default.
• W1983171921 startingPage "e11361" @default.
• W1983171921 abstract "Background Y2 receptor signalling is known to be important in neuropeptide Y (NPY)-mediated effects on energy homeostasis and bone physiology. Y2 receptors are located post-synaptically as well as acting as auto receptors on NPY-expressing neurons, and the different roles of these two populations of Y2 receptors in the regulation of energy homeostasis and body composition are unclear. Methodology/Principal Findings We thus generated two conditional knockout mouse models, Y2lox/lox and NPYCre/+;Y2lox/lox, in which Y2 receptors can be selectively ablated either in the hypothalamus or specifically in hypothalamic NPY-producing neurons of adult mice. Specific deletion of hypothalamic Y2 receptors increases food intake and body weight compared to controls. Importantly, specific ablation of hypothalamic Y2 receptors on NPY-containing neurons results in a significantly greater adiposity in female but not male mice, accompanied by increased hepatic triglyceride levels, decreased expression of liver cartinine palmitoyltransferase (CPT1) and increased expression of muscle phosphorylated acetyl-CoA carboxylase (ACC). While food intake, body weight, femur length, bone mineral content, density and cortical bone volume and thickness are not significantly altered, trabecular bone volume and number were significantly increased by hypothalamic Y2 deletion on NPY-expressing neurons. Interestingly, in situ hybridisation reveals increased NPY and decreased proopiomelanocortin (POMC) mRNA expression in the arcuate nucleus of mice with hypothalamus-specific deletion of Y2 receptors in NPY neurons, consistent with a negative feedback mechanism between NPY expression and Y2 receptors on NPY-ergic neurons. Conclusions/Significance Taken together these data demonstrate the anti-obesogenic role of Y2 receptors in the brain, notably on NPY-ergic neurons, possibly via inhibition of NPY neurons and concomitant stimulation of POMC-expressing neurons in the arcuate nucleus of the hypothalamus, reducing lipogenic pathways in liver and/or skeletal muscle in females. These data also reveal as an anti-osteogenic effect of Y2 receptors on hypothalamic NPY-expressing neurons on trabecular but not on cortical bone." @default.
• W1983171921 created "2016-06-24" @default.
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• W1983171921 date "2010-06-29" @default.
• W1983171921 modified "2023-10-15" @default.
• W1983171921 title "NPY Neuron-Specific Y2 Receptors Regulate Adipose Tissue and Trabecular Bone but Not Cortical Bone Homeostasis in Mice" @default.
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• W1983171921 doi "https://doi.org/10.1371/journal.pone.0011361" @default.
• W1983171921 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2894044" @default.
• W1983171921 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20613867" @default.
• W1983171921 hasPublicationYear "2010" @default.
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