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Related Experiment Video

Updated: Apr 21, 2026

Treatment of Osteochondral Defects in the Rabbit's Knee Joint by Implantation of Allogeneic Mesenchymal Stem Cells in Fibrin Clots
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Meniscal repair possibilities using bone morphogenetic protein-7.

Francisco Forriol1, Purificación Ripalda2, Julio Duart3

  • 1University San Pablo - CEU, School of Medicine, Madrid, Spain.

Injury
|November 12, 2014
PubMed
Summary

Bone morphogenetic protein-7 (BMP-7) promotes meniscal cell and collagen formation. In vitro and in vivo studies show BMP-7 enhances collagen expression and meniscal tissue regeneration.

Keywords:
BMPGrowth factorMeniscusTissue engineering

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Area of Science:

  • Orthopedics
  • Regenerative Medicine
  • Biochemistry

Background:

  • Meniscal tears are common knee injuries, often affecting the avascular zone with limited healing potential.
  • Bone morphogenetic protein-7 (BMP-7) is a growth factor known to influence cell differentiation and tissue repair.

Purpose of the Study:

  • To investigate the effects of BMP-7 on meniscal cells and tissue structure in vitro and in vivo.
  • To assess BMP-7's potential to stimulate collagen production and meniscal regeneration in avascular areas.

Main Methods:

  • Meniscal cells from sheep were isolated and treated with BMP-7 in vitro, with gene expression analyzed via qPCR.
  • Surgical defects in the avascular zone of sheep menisci were treated with BMP-7 or a control putty in vivo.
  • Animals were sacrificed at 6, 12, and 25 weeks post-surgery for histological analysis.

Main Results:

  • In vitro, BMP-7 increased collagen type IIA (Col2A) and BMP-7 expression in vascular cells, while inhibiting matrix metalloproteinases (MMPs).
  • BMP-7 treatment of avascular cells increased collagen type I (Col1) and Col2A expression and inhibited MMPs.
  • In vivo, BMP-7 treatment led to cell infiltration and fibrous tissue formation in meniscal defects within 12 weeks.

Conclusions:

  • BMP-7 demonstrates potential in promoting meniscal cell proliferation and collagen synthesis.
  • BMP-7 may serve as a therapeutic agent for enhancing meniscal tissue repair, particularly in avascular regions.
  • Further research is warranted to explore BMP-7's clinical applications in treating meniscal injuries.