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Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects
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Piperine induces osteoblast differentiation through AMPK-dependent Runx2 expression.

Do-Young Kim1, Eun-Jung Kim2, Won-Gu Jang1

  • 1Department of Biotechnology, College of Engineering, Daegu University, Gyeongbuk, 38453, Republic of Korea; Research Institute of Anti-Aging, Daegu University, Gyeongbuk, 38453, Republic of Korea.

Biochemical and Biophysical Research Communications
|December 6, 2017
PubMed
Summary

Piperine, found in black pepper, enhances bone health by promoting osteoblast differentiation. This study reveals piperine activates AMPK signaling, a key pathway for bone formation.

Keywords:
AMP-activated protein kinase (AMPK)C3H10T1/2MC3T3-E1Osteogenic differentiationPiperine

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Bone Biology

Background:

  • Piperine, an alkaloid from black pepper, exhibits antioxidant, anti-inflammatory, and cancer-preventive properties.
  • Antioxidants are known to promote osteoblast differentiation, crucial for bone formation.
  • The specific mechanisms by which piperine influences osteoblast differentiation remain unclear.

Purpose of the Study:

  • To investigate the effect of piperine on osteoblast differentiation.
  • To elucidate the molecular pathways involved in piperine-induced osteogenesis.
  • To determine if piperine influences key osteogenic gene expression and activity.

Main Methods:

  • Reverse transcription polymerase chain reaction (RT-PCR) was used to analyze the expression of osteogenic genes (Dlx5, Id1, Runx2).
  • Alkaline phosphatase (ALP) activity and mineralization assays were performed to assess osteoblast function.
  • Western blotting was employed to investigate the phosphorylation status of AMP-activated protein kinase (AMPK).

Main Results:

  • Piperine treatment significantly increased the expression of osteogenic genes, including Dlx5, Id1, and Runx2.
  • Elevated alkaline phosphatase activity and enhanced mineralization were observed in piperine-treated cells.
  • Piperine was confirmed to induce the phosphorylation of AMPK in MC3T3-E1 osteoblast cells.

Conclusions:

  • Piperine effectively enhances osteoblast differentiation.
  • The osteogenic effects of piperine are mediated through the activation of the AMPK signaling pathway.
  • These findings suggest piperine as a potential therapeutic agent for bone health.