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Related Concept Videos

Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...

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Related Experiment Video

Updated: Jun 21, 2026

Estrogen-Like Effect of Bazi Bushen Capsule in Ovariectomized Rats
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Published on: April 7, 2023

Sex-specific compromised bone healing in female rats might be associated with a decrease in mesenchymal stem cell

Patrick Strube1, Manav Mehta, Anne Baerenwaldt

  • 1Center for Musculoskeletal Surgery and Julius Wolff Institute Berlin, Charité University Medicine Berlin, Augustenburger Platz 1, 13353 Berlin, Germany.

Bone
|August 15, 2009
PubMed
Summary
This summary is machine-generated.

Female rats exhibit poorer bone healing due to fewer mesenchymal stem cells (MSCs). This study highlights sex-specific differences in bone repair, with females showing compromised healing and reduced MSCs, impacting outcomes.

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Published on: October 12, 2016

Area of Science:

  • Orthopedics
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Patient sex is a critical factor in bone healing, yet animal models inadequately represent this.
  • Cellular mechanisms driving sex-specific bone healing remain unclear.
  • Mesenchymal stem cells (MSCs) are key regulators of tissue regeneration and may influence sex-based healing disparities.

Purpose of the Study:

  • To investigate sex-specific variations in bone healing processes.
  • To analyze sex-based differences in mesenchymal stem cell (MSC) populations.
  • To correlate MSC characteristics with bone healing outcomes in a rat model.

Main Methods:

  • A 1.5 mm osteotomy gap in rat femora was stabilized, with healing assessed via biomechanical testing, radiography, and microCT.
  • Mesenchymal stem cells (MSCs) were isolated from bone marrow.
  • MSC analysis included colony-forming units (CFUs), differentiation, proliferation capacity, and senescence.

Main Results:

  • Female rats demonstrated compromised callus mechanical competence and delayed bridging.
  • Radiographic and microCT analyses revealed reduced callus size, mineralization, and geometric properties in females.
  • Female bone marrow had significantly fewer MSCs (lower CFU counts) compared to males, though functional characteristics were similar.

Conclusions:

  • Female rats exhibited biomechanically compromised and radiographically delayed bone formation.
  • A reduced number of mesenchymal stem cells (MSCs) in females was observed.
  • The diminished MSC population may be a causative factor for suboptimal bone healing in females.