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Inhibition of Y1 Receptor Promotes Osteogenesis in Bone Marrow Stromal Cells via cAMP/PKA/CREB Pathway

Wei Yu1,2, Fan-Cheng Chen3, Wen-Ning Xu2

  • 1Department of Orthopaedic Surgery, Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.

Frontiers in Endocrinology
|November 26, 2020
PubMed

Insights

Neuropeptide Y1 receptor deficiency enhances bone formation by activating the cAMP/PKA/CREB pathway, leading to increased RUNX2 expression and osteogenic differentiation in bone marrow stromal cells.

Area of Science:

  • Cell Biology
  • Endocrinology
  • Bone Biology

Background:

  • Neuropeptide Y1 receptor (Y1R) inhibition promotes osteogenesis, but the underlying mechanisms are unclear.
  • Understanding Y1R's role is crucial for developing bone regeneration therapies.

Purpose of the Study:

  • To investigate the effects of Y1 receptor deficiency on osteogenic differentiation in human bone marrow stromal cells (BMSCs).
  • To elucidate the molecular pathways mediating Y1R deficiency-induced osteogenesis.

Main Methods:

  • Genetic and pharmacological inhibition of Y1 receptor in BMSCs.
  • Analysis of osteogenic markers, RUNX2 expression, intracellular cAMP levels, and protein kinase A (PKA) activity.
  • Use of PKA inhibitor (H-89) to assess pathway involvement.

Main Results:

  • Y1 receptor deficiency significantly stimulated osteogenic differentiation in BMSCs.
  • This stimulation correlated with upregulated RUNX2 expression.
  • The mechanism involved increased intracellular cAMP, PKA activation, CREB phosphorylation (p-CREB), and subsequent RUNX2 activation.

Conclusions:

  • Y1 receptor deficiency promotes osteogenic differentiation in BMSCs.
  • This process is mediated by the cAMP/PKA/CREB pathway, leading to RUNX2 activation.
Keywords:
RUNX2bone marrow stromal cells (BMSCs)neuropeptide Y1 receptorosteogenesisprotein kinase A

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