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Genetic interactions between polycystin-1 and Wwtr1 in osteoblasts define a novel mechanosensing mechanism regulating bone formation in mice

Journal Article · · Bone Research
Molecular mechanisms transducing physical forces in the bone microenvironment to regulate bone mass are poorly understood. Here, we used mouse genetics, mechanical loading, and pharmacological approaches to test the possibility that polycystin-1 and Wwtr1 have interdependent mechanosensing functions in osteoblasts. We created and compared the skeletal phenotypes of control Pkd1flox/+;Wwtr1flox/+, Pkd1Oc-cKO, Wwtr1Oc-cKO, and Pkd1/Wwtr1Oc-cKO mice to investigate genetic interactions. Consistent with an interaction between polycystins and Wwtr1 in bone in vivo, Pkd1/Wwtr1Oc-cKO mice exhibited greater reductions of BMD and periosteal MAR than either Wwtr1Oc-cKO or Pkd1Oc-cKO mice. Micro-CT 3D image analysis indicated that the reduction in bone mass was due to greater loss in both trabecular bone volume and cortical bone thickness in Pkd1/Wwtr1Oc-cKO mice compared to either Pkd1Oc-cKO or Wwtr1Oc-cKO mice. Pkd1/Wwtr1Oc-cKO mice also displayed additive reductions in mechanosensing and osteogenic gene expression profiles in bone compared to Pkd1Oc-cKO or Wwtr1Oc-cKO mice. Moreover, we found that Pkd1/Wwtr1Oc-cKO mice exhibited impaired responses to tibia mechanical loading in vivo and attenuation of load-induced mechanosensing gene expression compared to control mice. Finally, control mice treated with a small molecule mechanomimetic, MS2 that activates the polycystin complex resulted in marked increases in femoral BMD and periosteal MAR compared to vehicle control. In contrast, Pkd1/Wwtr1Oc-cKO mice were resistant to the anabolic effects of MS2. These findings suggest that PC1 and Wwtr1 form an anabolic mechanotransduction signaling complex that mediates mechanical loading responses and serves as a potential novel therapeutic target for treating osteoporosis.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2406741
Journal Information:
Bone Research, Journal Name: Bone Research Journal Issue: 1 Vol. 11; ISSN 2095-6231
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

References (54)

Osteocyte RANKL: New insights into the control of bone remodeling journal February 2012
Osteoporosis is associated with increased marrow fat content and decreased marrow fat unsaturation: A proton MR spectroscopy study journal July 2005
MAB, a generally applicable molecular force field for structure modelling in medicinal chemistry journal June 1995
Age-Related Increases in Marrow Fat Volumes have Regional Impacts on Bone Cell Numbers and Structure journal April 2020
Physiological mechanisms and therapeutic potential of bone mechanosensing journal June 2015
Gone Caving: Roles of the Transcriptional Regulators YAP and TAZ in Skeletal Development journal July 2020
Simulated microgravity inhibits osteogenic differentiation of mesenchymal stem cells through down regulating the transcriptional co-activator TAZ journal December 2015
The YAP/TAZ transcriptional co-activators have opposing effects at different stages of osteoblast differentiation journal July 2018
Bone health in autosomal dominant polycystic kidney disease (ADPKD) patients after kidney transplantation journal June 2023
A Mechanical Checkpoint Controls Multicellular Growth through YAP/TAZ Regulation by Actin-Processing Factors journal August 2013
Bone marrow adipose tissue: formation, function and regulation journal June 2016
A distinct bone phenotype in ADPKD patients with end-stage renal disease journal February 2019
Mineral bone disease in autosomal dominant polycystic kidney disease journal April 2021
Leptin Receptor Promotes Adipogenesis and Reduces Osteogenesis by Regulating Mesenchymal Stromal Cells in Adult Bone Marrow journal June 2016
Role of YAP/TAZ in cell-matrix adhesion-mediated signalling and mechanotransduction journal April 2016
An integrative bioinformatics approach to decipher adipocyte-induced transdifferentiation of osteoblast journal July 2022
ff14SB: Improving the Accuracy of Protein Side Chain and Backbone Parameters from ff99SB journal July 2015
Solvated Interaction Energy (SIE) for Scoring Protein−Ligand Binding Affinities. 1. Exploring the Parameter Space journal January 2007
Role of YAP/TAZ in mechanotransduction journal June 2011
A critical developmental switch defines the kinetics of kidney cyst formation after loss of Pkd1 journal October 2007
Mechanobiology of YAP and TAZ in physiology and disease journal September 2017
Mechanical loading activates the YAP/TAZ pathway and chemokine expression in the MLO-Y4 osteocyte-like cell line journal December 2021
Molecular mechanosensors in osteocytes journal June 2020
TAZ inhibits osteoclastogenesis by attenuating TAK1/NF-κB signaling journal July 2021
Simulated microgravity inhibits osteogenic differentiation of mesenchymal stem cells via depolymerizing F-actin to impede TAZ nuclear translocation journal July 2016
Glomerulocystic kidney disease in mice with a targeted inactivation of Wwtr1 journal January 2007
Kidney-specific inactivation of the KIF3A subunit of kinesin-II inhibits renal ciliogenesis and produces polycystic kidney disease journal April 2003
Conditional Disruption of Pkd1 in Osteoblasts Results in Osteopenia Due to Direct Impairment of Bone Formation journal November 2009
Increased Bone Mass in Mice after Single Injection of Anti-receptor Activator of Nuclear Factor-κB Ligand-neutralizing Antibody journal October 2011
Osteoblast-specific Knockout of the Insulin-like Growth Factor (IGF) Receptor Gene Reveals an Essential Role of IGF Signaling in Bone Matrix Mineralization journal November 2002
Cilia-like Structures and Polycystin-1 in Osteoblasts/Osteocytes and Associated Abnormalities in Skeletogenesis and Runx2 Expression journal August 2006
Polycystin-1 Regulates Skeletogenesis through Stimulation of the Osteoblast-specific Transcription Factor RUNX2 -II journal March 2008
Polycystin-1 regulates bone development through an interaction with the transcriptional coactivator TAZ journal September 2018
Conditional deletion of Pkd1 in osteocytes disrupts skeletal mechanosensing in mice journal July 2011
Skeletal cell YAP and TAZ combinatorially promote bone development journal January 2018
A Functional Floxed Allele of Pkd1 that Can Be Conditionally Inactivated In Vivo journal December 2004
TAZ, a Transcriptional Modulator of Mesenchymal Stem Cell Differentiation journal August 2005
TAZ Promotes PC2 Degradation through a SCF -Trcp E3 Ligase Complex journal July 2007
Polycystin-1 interacts with TAZ to stimulate osteoblastogenesis and inhibit adipogenesis journal November 2017
Osteocyte RANKL is required for cortical bone loss with age and is induced by senescence journal October 2020
Evidence for Bone and Mineral Metabolism Alterations in Children With Autosomal Dominant Polycystic Kidney Disease journal September 2017
The Hippo pathway effectors TAZ and YAP in development, homeostasis and disease journal April 2014
Yap- and Cdc42-Dependent Nephrogenesis and Morphogenesis during Mouse Kidney Development journal March 2013
Kif3a Deficiency Reverses the Skeletal Abnormalities in Pkd1 Deficient Mice by Restoring the Balance Between Osteogenesis and Adipogenesis journal December 2010
Conditional Mesenchymal Disruption of Pkd1 Results in Osteopenia and Polycystic Kidney Disease journal September 2012
Osteoblast-Targeted Overexpression of TAZ Increases Bone Mass In Vivo journal February 2013
Shear Stress Induced by an Interstitial Level of Slow Flow Increases the Osteogenic Differentiation of Mesenchymal Stem Cells through TAZ Activation journal March 2014
Osteoblast-Specific Deletion of Pkd2 Leads to Low-Turnover Osteopenia and Reduced Bone Marrow Adiposity journal December 2014
Adipocyte-induced transdifferentiation of osteoblasts and its potential role in age-related bone loss journal January 2021
Osteoporosis: Mechanism, Molecular Target and Current Status on Drug Development journal March 2021
Leptin Induces Proadipogenic and Proinflammatory Signaling in Adipocytes journal December 2019
Osteoblast-Osteoclast Communication and Bone Homeostasis journal September 2020
Uncarboxylated osteocalcin promotes osteogenesis and inhibits adipogenesis of mouse bone marrow‑derived mesenchymal stem cells via the PKA‑AMPK‑SIRT1 axis journal June 2021
Stimulation of Piezo1 by mechanical signals promotes bone anabolism journal October 2019

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