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CXCL2 attenuates osteoblast differentiation by inhibiting the ERK1/2 signaling pathway

Yang Yang1, Xinying Zhou1, Yuejun Li1

  • 1Department of Orthopedics, Academy of Orthopedics Guangdong Province, the Third Affiliated Hospital of Southern Medical University, 510000 Guangzhou, China.

Journal of Cell Science
|July 12, 2019
PubMed

Insights

C-X-C motif chemokine ligand 2 (CXCL2) negatively regulates bone formation by inhibiting osteoblast differentiation via the ERK1/2 pathway. Targeting CXCL2 may improve bone health.

Area of Science:

  • Bone Biology
  • Immunology
  • Cell Signaling

Background:

  • C-X-C motif chemokine ligand 2 (CXCL2) is involved in immune and inflammatory processes.
  • The role of CXCL2 in bone formation was previously unreported.
  • CXCL2 is found in bone marrow and osteoblasts.

Purpose of the Study:

  • To investigate the effect of CXCL2 on bone formation.
  • To elucidate the underlying molecular mechanisms of CXCL2's action on osteoblasts.

Main Methods:

  • CXCL2 neutralization in vivo using antibodies in mice.
  • Osteoblast proliferation and differentiation assays in vitro.
  • Analysis of the ERK1/2 (MAPK3/1) signaling pathway.

Main Results:

  • CXCL2 neutralization alleviated bone loss in mice, indicating a negative role in bone formation.
  • CXCL2 overexpression attenuated osteoblast proliferation and differentiation.
  • CXCL2 inhibits osteoblast differentiation by suppressing the ERK1/2 signaling pathway.

Conclusions:

  • CXCL2 is a negative regulator of bone formation.
  • CXCL2 attenuates osteoblast differentiation via inhibition of the ERK1/2 pathway.
  • Targeting CXCL2 and its regulatory pathways may offer therapeutic benefits for bone formation.
Keywords:
Bone formationCXCL2DifferentiationERK1/2OsteoblastOsteoporosis

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