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Differential roles of PDGFR-alpha and PDGFR-beta in angiogenesis and vessel stability

Junhang Zhang1, Renhai Cao, Yun Zhang

  • 1Division of Vascular Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet, SE-17176, Stockholm, Sweden.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|October 2, 2008
PubMed

Insights

Combining platelet-derived growth factor AB (PDGF-AB) with fibroblast growth factor 2 (FGF-2) promotes stable blood vessel growth. This combination effectively treats ischemic diseases by enhancing vascularization and perfusion in animal models.

Area of Science:

  • Regenerative Medicine
  • Vascular Biology
  • Biotechnology

Background:

  • Previous attempts to treat ischemic conditions with single proangiogenic factors have shown limited success.
  • Stable and functional arterial networks may necessitate the combined action of multiple angiogenic and arteriogenic factors.

Purpose of the Study:

  • To compare the angiogenic and therapeutic effects of fibroblast growth factor 2 (FGF-2) combined with platelet-derived growth factor (PDGF)-AA or PDGF-AB.
  • To investigate the role of PDGF receptor beta (PDGFR-beta) in vascular stability.

Main Methods:

  • In vivo angiogenesis assays (mouse cornea model) and ischemic hind-limb models in rats.
  • Evaluation of vascular network formation, collateral growth, and tissue perfusion.
  • Immunohistochemical analysis to assess cellular recruitment and marker expression.

Main Results:

  • Both PDGF-AA/FGF-2 and PDGF-AB/FGF-2 combinations synergistically induced angiogenesis.
  • PDGF-AB/FGF-2 promoted vascular stability by recruiting pericytes, a process dependent on PDGFR-beta.
  • PDGF-AB/FGF-2 significantly improved perfusion and induced stable collateral growth in ischemic hind limbs.

Conclusions:

  • PDGF-AB in combination with FGF-2 is an optimal therapeutic strategy for promoting stable arteriogenesis in ischemic tissues.
  • PDGFR-beta signaling is crucial for achieving stable neovasculature.
  • This combination therapy holds promise for treating ischemic diseases.

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