Cited by 1,086Bone Metabolism and DiseasesWnt/β-catenin signaling in development and cancerBone health and osteoporosis research

Cbfa1-independent decrease in osteoblast proliferation, osteopenia, and persistent embryonic eye vascularization in mice deficient in Lrp5, a Wnt coreceptor

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Kato, Masaki, Patel, Millan S., Levasseur, Regis, Lobov, Ivan, Chang, Benny H.-J., Glass, Donald A., Hartmann, Christine, Li, Lan +5 more·2002·The Journal of Cell Biology

Abstract

The low-density lipoprotein receptor–related protein (Lrp)-5 functions as a Wnt coreceptor. Here we show that mice with a targeted disruption of Lrp5 develop a low bone mass phenotype. In vivo and in vitro analyses indicate that this phenotype becomes evident postnatally, and demonstrate that it is secondary to decreased osteoblast proliferation and function in a Cbfa1-independent manner. Lrp5 is expressed in osteoblasts and is required for optimal Wnt signaling in osteoblasts. In addition, Lrp5-deficient mice display persistent embryonic eye vascularization due to a failure of macrophage-induced endothelial cell apoptosis. These results implicate Wnt proteins in the postnatal control of vascular regression and bone formation, two functions affected in many diseases. Moreover, these features recapitulate human osteoporosis-pseudoglioma syndrome, caused by LRP5 inactivation.

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Crossref · 10.1083/jcb.200201089

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  • Loss-of-function mutations in the Wnt receptor LRP5 result in low bone mass in both humans and mice.

    “Given that loss-of-function mutations in the Wnt receptor LRP5 results in low bone mass in both humans (47) and mice (48), the down-regulation of sFRP4, taken together with changes in levels of several Wnt inhibitors, suggests that altered Wnt signaling may play a role in bone loss resulting from exposure to microgravity and that the protective effect of ACVR2B/Fc on microgravity-induced bone loss”

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  1. Willnow, T.E. 1999. The low-density lipoprotein receptor gene family: multiple roles in lipid metabolism. J. Mol. Med. 77: 306–315. 10090593

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Authors
Kato, M., Patel, M. S., Levasseur, R., Lobov, I., Chang, B. H.-J., Glass, D. A., Hartmann, C., Li, L., Hwang, T.-H., Brayton, C. F., Lang, R. A., Karsenty, G., & Chan, L.
Affiliations
  • Baylor College of Medicine (US)
  • 2Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030
  • University of Cincinnati (US)
  • Harvard University (US)
Venue
The Journal of Cell Biology
Published
2002-04-15
Volume
157
Issue
2
Pages
303-314
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2116610925
Cited by
1,086
References
46
Citations by year
2026: 8 · 2025: 10 · 2024: 18 · 2023: 13 · 2022: 21 · 2021: 24 · 2020: 33 · 2019: 27 · 2018: 26 · 2017: 40 · 2016: 27 · 2015: 39 · 2014: 56 · 2013: 65 · 2012: 61
FWCI
22.08
Type
journal article
Language
en
Open access
Locations
  • The Journal of Cell Biology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • March of Dimes Foundation
  • Universiteit Utrecht
  • National Institutes of Health (5r01dk058882-03, AR42919)
  • Canadian Institutes of Health Research
  • National Heart, Lung, and Blood Institute (HL16512, R01HL016512, HL-51586, R01HL051586)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 58882)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (P01AR042919, AR42919)
  • National Institute of Dental and Craniofacial Research (DE11290, R01DE011290)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
Keywords
LRP5, Wnt signaling, osteoblast proliferation, osteopenia, vascular regression, endothelial cell apoptosis, macrophages, osteoporosis-pseudoglioma syndrome, bone formation, postnatal development
MeSH terms
Animals, Bone and Bones, Bone Development, Bone Diseases, Metabolic, Calcium, Cell Division, Eye, Eye Abnormalities, Immunohistochemistry, Macrophages, Neoplasm Proteins, Organ Size, Osteoblasts, Phenotype, Proto-Oncogene Proteins, Receptors, LDL, Transcription Factors, Signal Transduction, Mutagenesis, Site-Directed, Apoptosis, Mice, Knockout, Gene Expression Regulation, Developmental, In Situ Nick-End Labeling, LDL-Receptor Related Proteins, Zebrafish Proteins, Core Binding Factor Alpha 1 Subunit, Wnt Proteins, Mice, Low Density Lipoprotein Receptor-Related Protein-5

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