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• W2902332017 abstract "Neuropeptide Y (NPY) is involved in multiple processes such as behavior, energy and bone metabolism. Previous studies have relied on global NPY depletion to examine its effects on bone. However, this approach is unable to distinguish the central or local source of NPY influencing bone. Our aim was to identify which cells within the skeleton express Npy and establish a model that will enable us to differentiate effects of NPY derived from different cell types. We have generated the NPY floxed (NPYflox) mice using CRISPR technology. By crossing the NPYflox mice with Hypoxanthine Phosphoribosyltransferase 1 (Hprt)-cre to generate a global knockout, we were able to validate and confirm loss of Npy transcript and protein in our global NPYKO. Global deletion of NPY results in a smaller femoral cortical cross-sectional area (-12%) and reduced bone strength (-18%) in male mice. In vitro, NPY-deficient bone marrow stromal cells (BMSCs) showed increase in osteogenic differentiation detected by increases in alkaline phosphatase staining and bone sialoprotein and osteocalcin expression. Despite both sexes presenting with increased adiposity, female mice had no alterations in bone mass, suggesting that NPY may have sex-specific effects on bone. In this study we identified Npy expression in the skeleton and examined the effect of global NPY depletion to bone mass. The differential impact of NPY deletion in cortical and cancellous compartments along with differences in phenotypes between in vitro and in vivo, highlights the complex nature of NPY signaling, indicative of distinct sources that can be dissected in the future using this NPYflox model." @default.
• W2902332017 created "2018-12-11" @default.
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• W2902332017 date "2019-02-01" @default.
• W2902332017 modified "2023-09-24" @default.
• W2902332017 title "Skeletal phenotype of the neuropeptide Y knockout mouse" @default.
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• W2902332017 doi "https://doi.org/10.1016/j.npep.2018.11.009" @default.
• W2902332017 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6326877" @default.
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