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P2Y2 Inhibition Modifies the Anabolic Response to Exercise in Adult Mice.

Amit Chougule1,2,3, Chunbin Zhang1, Jordan Denbow1

  • 1Bone and Joint Center, Henry Ford Health System, Detroit, Michigan, USA.

Aging Cell
|January 1, 2025
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Summary

Inhibiting the P2Y2 receptor with AR-C118925XX (ARC) enhances bone formation and the anabolic response to exercise in aging mice. This approach limits osteoclast activity, improving bone health.

Keywords:
mechanobiologyosteoporosispurinergic signaling

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Area of Science:

  • Bone Biology and Aging
  • Pharmacology
  • Mechanobiology

Background:

  • Aging populations face increased osteoporotic fractures due to limited bone formation therapies.
  • Exercise is crucial for bone mass, but its anabolic effects diminish with age.
  • The P2Y2 receptor is implicated in bone mechanotransduction and osteoblast function.

Purpose of the Study:

  • To investigate if pharmaceutical inhibition of P2Y2 receptors enhances bone mass and mechanotransduction in aging.
  • To test the hypothesis that P2Y2 inhibition boosts the anabolic response to loading in older individuals.

Main Methods:

  • Adult mice, exhibiting a minimal response to exercise, were treated with the P2Y2 inhibitor AR-C118925XX (ARC).
  • The anabolic response to exercise and the effects of ARC on bone formation and mechanotransduction were examined.

Main Results:

  • ARC treatment significantly increased periosteal bone formation in response to exercise.
  • Enhanced exercise response involved reduced osteocyte-induced osteoclast activity.
  • Endocortical bone formation increased with ARC treatment independently of exercise, improving mechanical strength.

Conclusions:

  • P2Y2 receptor inhibition beneficially impacts bone formation and the anabolic response to loading.
  • Limiting P2Y2 activation, particularly osteoclast activation, is a promising therapeutic strategy for age-related bone loss.