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Updated: Jun 18, 2026

Culturing and Measuring Fetal and Newborn Murine Long Bones

Culturing and Measuring Fetal and Newborn Murine Long Bones

Published on: April 26, 2019

Developing bones are differentially affected by compromised skeletal muscle formation.

Niamh C Nowlan¹, Céline Bourdon, Gérard Dumas

¹Department of Zoology, School of Natural Sciences, Trinity College Dublin, Ireland.

|December 2, 2009

Summary

Prenatal muscle development is crucial for bone formation. Lack of muscle in mouse models significantly impacts skeletal development, affecting specific bones and joints differently. This highlights the complex interplay between mechanical forces and location in embryonic limb development.

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Published on: February 7, 2025

Area of Science:

Developmental Biology
Skeletal Biology
Biophysics

Background:

Mechanical forces are vital for adult bone function and repair.
The influence of prenatal muscle contractions on embryonic bone development is not fully understood.
Mammalian model systems offer insights into skeletal development.

Purpose of the Study:

To investigate the impact of disrupted skeletal muscle development on embryonic bone formation in mice.
To analyze skeletogenesis in 'muscleless' and 'reduced muscle' mouse mutant models.
To determine how mechanical forces from muscle influence specific skeletal rudiments and joints.

Main Methods:

Utilized two 'muscleless' mouse mutant models: Myf5(nlacZ/nlacZ):MyoD(-/-) and Pax3(Sp/Sp).
Examined skeletal development in a 'reduced muscle' model: Myf5(nlacZ/+):MyoD(-/-).
Analyzed ossification centers, bone formation, limb morphology, and joint development through histological examination.

Main Results:

Muscleless limbs showed decreased bone formation in scapula, humerus, ulna, and femur, but not tibia.
Abnormal ossification center morphology was observed in the scapula and humerus.
Elbow joint development was significantly affected with a reduced joint line; knee joint remained normal.
Reduced muscle mass led to intermediate effects on skeletal development, impacting scapula and humerus bone formation.
Specific bones and joints were differentially affected by the absence of skeletal muscle.

Conclusions:

Skeletal development is differentially sensitive to the lack of skeletal muscle, varying by location.
The response of skeletal progenitor cells to mechanical stimuli is likely location-dependent.
A complex interaction between mechanical forces and location-specific factors governs embryonic bone and joint development.