Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells

Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Xin Zhou [verfasserIn] Allyson Beilter [verfasserIn] Zhaohui Xu [verfasserIn] Ruli Gao [verfasserIn] Shunbin Xiong [verfasserIn] Adriana Paulucci-Holthauzen [verfasserIn] Guillermina Lozano [verfasserIn] Benoit de Crombrugghe [verfasserIn] Richard Gorlick [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Übergeordnetes Werk:	In: Cell Death and Disease - Nature Publishing Group, 2010, 12(2021), 6, Seite 13
Übergeordnetes Werk:	volume:12 ; year:2021 ; number:6 ; pages:13

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1038/s41419-021-03758-w

Katalog-ID:	DOAJ001326171

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allfields	10.1038/s41419-021-03758-w doi (DE-627)DOAJ001326171 (DE-599)DOAJeed50df3b8af4e8994f051ac95c9838e DE-627 ger DE-627 rakwb eng QH573-671 Xin Zhou verfasserin aut Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Cytology Allyson Beilter verfasserin aut Zhaohui Xu verfasserin aut Ruli Gao verfasserin aut Shunbin Xiong verfasserin aut Adriana Paulucci-Holthauzen verfasserin aut Guillermina Lozano verfasserin aut Benoit de Crombrugghe verfasserin aut Richard Gorlick verfasserin aut In Cell Death and Disease Nature Publishing Group, 2010 12(2021), 6, Seite 13 (DE-627)620145250 (DE-600)2541626-1 20414889 nnns volume:12 year:2021 number:6 pages:13 https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e kostenfrei https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/toc/2041-4889 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2021 6 13
spelling	10.1038/s41419-021-03758-w doi (DE-627)DOAJ001326171 (DE-599)DOAJeed50df3b8af4e8994f051ac95c9838e DE-627 ger DE-627 rakwb eng QH573-671 Xin Zhou verfasserin aut Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Cytology Allyson Beilter verfasserin aut Zhaohui Xu verfasserin aut Ruli Gao verfasserin aut Shunbin Xiong verfasserin aut Adriana Paulucci-Holthauzen verfasserin aut Guillermina Lozano verfasserin aut Benoit de Crombrugghe verfasserin aut Richard Gorlick verfasserin aut In Cell Death and Disease Nature Publishing Group, 2010 12(2021), 6, Seite 13 (DE-627)620145250 (DE-600)2541626-1 20414889 nnns volume:12 year:2021 number:6 pages:13 https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e kostenfrei https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/toc/2041-4889 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2021 6 13
allfields_unstemmed	10.1038/s41419-021-03758-w doi (DE-627)DOAJ001326171 (DE-599)DOAJeed50df3b8af4e8994f051ac95c9838e DE-627 ger DE-627 rakwb eng QH573-671 Xin Zhou verfasserin aut Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Cytology Allyson Beilter verfasserin aut Zhaohui Xu verfasserin aut Ruli Gao verfasserin aut Shunbin Xiong verfasserin aut Adriana Paulucci-Holthauzen verfasserin aut Guillermina Lozano verfasserin aut Benoit de Crombrugghe verfasserin aut Richard Gorlick verfasserin aut In Cell Death and Disease Nature Publishing Group, 2010 12(2021), 6, Seite 13 (DE-627)620145250 (DE-600)2541626-1 20414889 nnns volume:12 year:2021 number:6 pages:13 https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e kostenfrei https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/toc/2041-4889 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2021 6 13
allfieldsGer	10.1038/s41419-021-03758-w doi (DE-627)DOAJ001326171 (DE-599)DOAJeed50df3b8af4e8994f051ac95c9838e DE-627 ger DE-627 rakwb eng QH573-671 Xin Zhou verfasserin aut Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Cytology Allyson Beilter verfasserin aut Zhaohui Xu verfasserin aut Ruli Gao verfasserin aut Shunbin Xiong verfasserin aut Adriana Paulucci-Holthauzen verfasserin aut Guillermina Lozano verfasserin aut Benoit de Crombrugghe verfasserin aut Richard Gorlick verfasserin aut In Cell Death and Disease Nature Publishing Group, 2010 12(2021), 6, Seite 13 (DE-627)620145250 (DE-600)2541626-1 20414889 nnns volume:12 year:2021 number:6 pages:13 https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e kostenfrei https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/toc/2041-4889 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2021 6 13
allfieldsSound	10.1038/s41419-021-03758-w doi (DE-627)DOAJ001326171 (DE-599)DOAJeed50df3b8af4e8994f051ac95c9838e DE-627 ger DE-627 rakwb eng QH573-671 Xin Zhou verfasserin aut Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation. Cytology Allyson Beilter verfasserin aut Zhaohui Xu verfasserin aut Ruli Gao verfasserin aut Shunbin Xiong verfasserin aut Adriana Paulucci-Holthauzen verfasserin aut Guillermina Lozano verfasserin aut Benoit de Crombrugghe verfasserin aut Richard Gorlick verfasserin aut In Cell Death and Disease Nature Publishing Group, 2010 12(2021), 6, Seite 13 (DE-627)620145250 (DE-600)2541626-1 20414889 nnns volume:12 year:2021 number:6 pages:13 https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e kostenfrei https://doi.org/10.1038/s41419-021-03758-w kostenfrei https://doaj.org/toc/2041-4889 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 12 2021 6 13
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author_browse	Xin Zhou Allyson Beilter Zhaohui Xu Ruli Gao Shunbin Xiong Adriana Paulucci-Holthauzen Guillermina Lozano Benoit de Crombrugghe Richard Gorlick
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title_sort	wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells
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title_auth	Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells
abstract	Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation.
abstractGer	Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation.
abstract_unstemmed	Abstract The developmental origins of mesenchymal progenitor cells (MPCs) and molecular machineries regulating their fate and differentiation are far from defined owing to their complexity. Osteoblasts and adipocytes are descended from common MPCs. Their fates are collectively determined by an orchestra of pathways in response to physiological and external cues. The canonical Wnt pathway signals MPCs to commit to osteogenic differentiation at the expense of adipogenic fate. In contrast to ß-catenin, p53’s anti-osteogenic function is much less understood. Both activities are thought to be achieved through targeting Runx2 and/or Osterix (Osx, Sp7) transcription. Precisely, how Osx activity is dictated by ß-catenin or p53 is not clarified and represents a knowledge gap that, until now, has largely been taken for granted. Using conditional lineage-tracing mice, we demonstrated that chondrocytes gave rise to a sizable fraction of MPCs, which served as progenitors of chondrocyte-derived osteoblasts (Chon-ob). Wnt/ß-catenin activity was only required at the stage of chondrocyte-derived mesenchymal progenitor (C-MPC) to Chon-ob differentiation. ß-catenin– C-MPCs lost osteogenic ability and favored adipogenesis. Mechanistically, we discovered that p53 activity was elevated in ß-catenin– MPCs including ß-catenin– C-MPCs and deleting p53 from the ß-catenin– MPCs fully restored osteogenesis. While high levels of p53 were present in the nuclei of ß-catenin– MPCs, Osx was confined to the cytoplasm, implying a mechanism that did not involve direct p53-Osx interaction. Furthermore, we found that p53’s anti-osteogenic activity was dependent on its DNA-binding ability. Our findings identify chondrocytes as an additional source for MPCs and indicate that Wnt/ß-catenin discretely regulates chondrocyte to C-MPC and the subsequent C-MPC to osteoblast developments. Most of all we unveil a previously unrecognized functional link between ß-catenin and p53, placing p53’s negative role in the context of Wnt/ß-catenin signaling-induced MPC osteogenic differentiation.
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title_short	Wnt/ß-catenin-mediated p53 suppression is indispensable for osteogenesis of mesenchymal progenitor cells
url	https://doi.org/10.1038/s41419-021-03758-w https://doaj.org/article/eed50df3b8af4e8994f051ac95c9838e https://doaj.org/toc/2041-4889
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author2	Allyson Beilter Zhaohui Xu Ruli Gao Shunbin Xiong Adriana Paulucci-Holthauzen Guillermina Lozano Benoit de Crombrugghe Richard Gorlick
author2Str	Allyson Beilter Zhaohui Xu Ruli Gao Shunbin Xiong Adriana Paulucci-Holthauzen Guillermina Lozano Benoit de Crombrugghe Richard Gorlick
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up_date	2024-07-03T19:45:33.456Z
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