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Adipose-Derived Stem Cells Decrease Bone Morphogenetic Protein Type 2-Induced Inflammation In Vivo.

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Human adipose-derived stem cells (ASCs) in polylactic co-glycolic acid (PLGA) scaffolds reduce inflammation and enhance blood vessel growth when combined with recombinant human bone morphogenetic protein type 2 (rhBMP-2). This combination improves outcomes for bone regeneration applications.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Recombinant human bone morphogenetic protein type 2 (rhBMP-2) is used for bone regeneration.
  • Undesirable side effects of rhBMP-2 are linked to inflammation.
  • Autogenous bone grafting may not offer advantages due to these side effects.

Purpose of the Study:

  • To evaluate the in vivo effect of human adipose-derived stem cells (ASCs) within polylactic co-glycolic acid (PLGA) scaffolds.
  • To assess the potential of ASCs to mitigate the inflammatory response induced by a low dose of rhBMP-2.
  • To investigate the impact on angiogenesis in muscular tissue.

Main Methods:

  • PLGA scaffolds were characterized and loaded with varying doses of rhBMP-2.
  • In vitro release of rhBMP-2 from scaffolds was quantified.
  • Beagle muscle tissue received treatments of PLGA, PLGA + rhBMP-2, or PLGA + rhBMP-2 + ASCs.
  • Samples were evaluated after 45 days.

Main Results:

  • The combination of PLGA, rhBMP-2, and ASCs resulted in significantly fewer inflammatory foci (P < .001).
  • This combination also led to a significant reduction in giant cells (P < .001).
  • A significant increase in angiogenesis sites was observed with the PLGA + rhBMP-2 + ASCs treatment (P < .001).

Conclusions:

  • Human ASCs delivered via PLGA scaffolds effectively decrease tissue inflammation.
  • The co-administration of ASCs with a low dose of rhBMP-2 promotes angiogenesis.
  • This approach holds promise for improving bone regeneration strategies by managing inflammatory responses.