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Unraveling the role of FoxOs in bone--insights from mouse models

Maria Almeida1

  • 1Division of Endocrinology and Metabolism, Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA. schullermaria@uams.edu

Bone
|June 14, 2011
PubMed

Insights

Forkhead box O (FoxO) transcription factors are vital for bone health, regulating bone cell activity and preventing age-related bone loss. Understanding FoxO

Area of Science:

  • Molecular biology
  • Cell biology
  • Skeletal biology

Background:

  • FoxO transcription factors regulate key cellular processes like metabolism, differentiation, and stress resistance.
  • FoxO activity is modulated by insulin signaling, nutrient availability, and reactive oxygen species (ROS).
  • Emerging evidence highlights a crucial role for FoxOs in maintaining skeletal homeostasis.

Purpose of the Study:

  • To review recent advances in understanding FoxO functions in bone biology.
  • To explore the mechanisms by which FoxOs influence osteoblast and osteoclast activity.
  • To discuss the implications of FoxO activation for age-related bone loss.

Main Methods:

  • This review synthesizes findings from recent experimental studies.
  • It integrates data on gene expression, protein interactions, and cellular processes.
  • The review focuses on studies investigating FoxO roles in osteoblast progenitors, osteoblasts, and osteoclasts.

Main Results:

  • FoxOs modulate redox balance, protein synthesis, and differentiation in osteoblast lineage cells.
  • FoxOs interact with key transcription factors like β-catenin, ATF-4, and Runx2 to regulate gene expression.
  • FoxO activation inhibits osteoclastogenesis through both direct and indirect pathways.

Conclusions:

  • FoxOs are critical regulators of skeletal homeostasis, influencing bone formation and resorption.
  • FoxO-mediated pathways offer potential therapeutic targets for age-related bone diseases.
  • Further research into FoxO signaling is essential for developing strategies to combat osteoporosis and other skeletal disorders.

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