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CD47 regulates the TGF-β signaling pathway in osteoblasts and is distributed in Meckel's cartilage

Koichi Shimada1, Akira Nakajima, Kyoko Ikeda

  • 1Department of Periodontology, Nihon University School of Dentistry, Tokyo, Japan. shimada-ki@dent.nihon-u.ac.jp

Journal of Oral Science
|June 30, 2011
PubMed

Insights

CD47 gene silencing in osteoblasts increased bone metabolism factors and TGF-β1 signaling. CD47 is present in developing mouse mandible, suggesting CD47 regulates mandible development.

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Molecular Biology

Background:

  • CD47 gene expression elevates during mandible development.
  • The precise role of CD47 in osteoblasts and mandible development remains unclear.

Purpose of the Study:

  • To investigate the function of CD47 in osteoblasts and its role in mandible development.
  • To explore the relationship between CD47, TGF-β1 signaling, and bone metabolism.

Main Methods:

  • CD47 was silenced in vitro using small interfering RNA (siRNA).
  • Levels of TGF-β1, phosphorylated-Smad2, and bone metabolism-related transcription factors were measured.
  • CD47 distribution was examined in mouse embryos (E13 and E15) in vivo.

Main Results:

  • CD47 silencing led to a dose-dependent increase in TGF-β1 and phosphorylated-Smad2 levels.
  • Transcription factor genes associated with bone metabolism were upregulated following CD47 silencing.
  • CD47-positive cells were identified in Meckel's cartilage and embryonic mandibular bone.

Conclusions:

  • CD47 plays a regulatory role in TGF-β1 signaling pathways.
  • CD47 may influence mandible development through its regulation of bone metabolism and TGF-β1 signaling.

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