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• W3015350489 abstract "ABSTRACT Low bone strength in overweight individuals is a significant medical problem. One important determinant of mesenchymal stem cell fate into osteoblasts or adipocytes is the Wnt signaling pathway. We recently showed that Dickkopf‐1 (DKK1), a potent Wnt inhibitor, is upregulated in obese mice. In this study, we investigated the role of DKK1 in the pathogenesis of obesity‐induced bone loss using global and tissue‐specific KO mice. Obesity was induced in 8‐week‐old male mice with an inducible global (Rosa26‐CreERT2) or osteoprogenitor‐ (Osx–Cre‐) specific deletion of Dkk1 with a high‐fat diet (HFD) containing 60% fat. After 12 weeks, body weight, bone volume, bone fat mass, and bone turnover were assessed. Dkk1 fl/fl ;Rosa26‐CreERT2 mice experienced a similar increase in body weight and white fat pads as control mice. A HFD significantly reduced trabecular bone mass and the bone formation rate in Cre‐ mice and Dkk1 fl/fl ;Rosa26‐CreERT2 mice. Interestingly, Dkk1 fl/fl ;Rosa26‐CreERT2 mice were protected from HFD‐induced cortical bone loss. Furthermore, a HFD was associated with increased bone marrow fat in the femur, which was less pronounced in Dkk1 fl/fl ;Rosa26‐CreERT2 mice. Mice with an osteoprogenitor‐specific Dkk1 deletion showed similar results as the global knockout, showing a protection against HFD‐induced cortical bone loss and an accumulation of bone marrow fat, but a similar decrease in trabecular bone volume. In summary, DKK1 appears to contribute distinctly to cortical, but not trabecular bone loss in obesity. © 2020 The Authors. JBMR Plus published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research." @default.
• W3015350489 created "2020-04-17" @default.
• W3015350489 creator A5007702426 @default.
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• W3015350489 creator A5056597436 @default.
• W3015350489 creator A5079830511 @default.
• W3015350489 date "2020-04-28" @default.
• W3015350489 modified "2023-10-16" @default.
• W3015350489 title "Contributions of Dickkopf‐1 to Obesity‐Induced Bone Loss and Marrow Adiposity" @default.
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• W3015350489 doi "https://doi.org/10.1002/jbm4.10364" @default.
• W3015350489 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7285751" @default.
• W3015350489 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32537550" @default.
• W3015350489 hasPublicationYear "2020" @default.
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