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Related Experiment Video

Updated: Mar 5, 2026

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation

A RANKL-based Osteoclast Culture Assay of Mouse Bone Marrow to Investigate the Role of mTORC1 in Osteoclast Formation

Published on: March 15, 2018

LRP5: From bedside to bench to bone.

Bart O Williams¹

¹Center for Cancer and Cell Biology and Program for Skeletal Disease and Tumor Microenvironment, Van Andel Research Institute, United States.

|March 26, 2017

Summary

This summary is machine-generated.

Genetic studies reveal that low-density lipoprotein-related receptor 5 (LRP5) and sclerostin (SOST) significantly impact human bone mass. Disruptions in these proteins lead to conditions of either low or high bone density.

Keywords:

Lrp5 Osteoblasts Sclerostin Wnt β-Catenin

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Last Updated: Mar 5, 2026

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Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

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Published on: April 14, 2016

Area of Science:

Bone biology
Genetics
Endocrinology

Background:

Low-density lipoprotein-related receptor 5 (LRP5) genetic variations are linked to significant alterations in human bone mass.
Sclerostin (SOST) gene mutations also correlate with changes in bone density, highlighting its role in skeletal homeostasis.

Purpose of the Study:

To elucidate the regulatory mechanisms of LRP5 and sclerostin in maintaining skeletal homeostasis.
To explore the interaction between sclerostin, LRP5, LRP6, and LRP4 in bone regulation.
To summarize findings from mouse models and clinical trials of SOST-blocking antibodies for increasing bone mass.

Main Methods:

Analysis of genetic alterations in LRP5 and SOST in human bone disorders.
Investigation of protein interactions using genetically engineered mouse models.
Review of clinical trial data for SOST-targeting therapies.

Main Results:

Loss of LRP5 function results in impaired osteoblast activity and reduced bone mass.
Loss of SOST function or LRP5 mutations preventing sclerostin binding lead to increased bone mass.
Sclerostin inhibits Wnt signaling by binding to LRP5/LRP6, a process facilitated by LRP4.

Conclusions:

LRP5 and sclerostin are critical regulators of bone mass, influencing osteoblast function and skeletal homeostasis.
Targeting the sclerostin-LRP5/6 interaction presents a therapeutic strategy for increasing bone mass, with clinical trials showing promise.