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Related Experiment Video

Updated: Jun 23, 2026

Culturing and Measuring Fetal and Newborn Murine Long Bones

Culturing and Measuring Fetal and Newborn Murine Long Bones

Published on: April 26, 2019

Joint loading-driven bone formation and signaling pathways predicted from genome-wide expression profiles.

Ping Zhang¹, Charles H Turner, Hiroki Yokota

¹Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA.

|May 16, 2009

Summary

Ankle loading stimulates bone formation in the tibia by increasing cortical area and thickness. This novel approach activates key signaling pathways, offering a potential non-pharmacological method to prevent bone loss.

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Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis

Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis

Published on: December 18, 2019

Area of Science:

Bone Biology and Mechanics
Skeletal Physiology
Biomedical Engineering

Background:

Joint loading is an emerging technique to stimulate bone growth via lateral loads on synovial joints like the elbow and knee.
Previous research focused on upper limb joints, leaving the effects on lower limb joints, specifically the ankle, unexplored.

Purpose of the Study:

To investigate whether ankle loading promotes bone formation in the tibia.
To identify the specific signaling pathways involved in load-driven anabolic responses in the tibia.

Main Methods:

Lateral loads of 0.5 N at 5 Hz were applied to the ankle of C57BL/6 female mice for 3 minutes daily over 3 days.
Bone formation was assessed using histomorphometry at proximal, middle, and distal tibial cross-sections.
Microarray analysis and quantitative real-time PCR were employed to analyze gene expression and signaling pathways.

Main Results:

Ankle loading significantly increased cortical area and thickness in all evaluated tibial cross-sections.
Histomorphometry confirmed elevated calcein-labeled surfaces, indicating new bone formation.
Signaling pathway analysis implicated phosphoinositide 3-kinase (PI3K), ECM-receptor interactions, TGF-beta, and Wnt signaling pathways.

Conclusions:

Ankle loading effectively stimulates bone formation throughout the tibia, affecting both endosteal and periosteal surfaces.
This loading modality activates crucial molecular signaling pathways involved in bone anabolism.
Ankle loading presents a promising non-pharmacological strategy for preventing bone loss and enhancing skeletal health.