Integrin alpha(v)beta(3) as a target in the prevention of neointimal hyperplasia

J Vasc Surg. 2007 Jun;45 Suppl A(6S):A33-8. doi: 10.1016/j.jvs.2007.02.069.

Abstract

Although major advances have been made in the prevention and treatment of restenosis following coronary and peripheral interventions, the persistent complications of thrombosis and reintervention remain a mainstay for repeat hospitalizations in this patient population. For many years, a ubiquitous cell surface receptor called alpha(v)beta(3) integrin was the target of investigators in the prevention of restenosis because its interaction with the extracellular matrix was believed to coordinate the migration of smooth muscle cells (SMCs) from the media to the intima, the seminal event in the formation of intimal occlusive lesion. After the publication of uniformly positive animal studies demonstrating that alpha(v)beta(3) integrin blockade led to a significant reduction in new intimal (neointimal) lesion formation, early clinical trials supported the association of avoidance of target lesion revascularization and the use of antagonists to the SMC integrin alpha(v)beta(3) and its related platelet integrin alpha(IIb)beta(3). However, a series of clinical trials subsequently demonstrated that these antagonists did not necessarily prevent revascularizations by inhibiting intimal hyperplasia per se. Additional animal studies subsequently showed that, indeed, in the setting of pre-existing SMCs in the intimal lesion (ie, atherosclerotic plaque, fatty streaks), inhibiting SMC migration by way of beta(3) integrin blockade was an ineffective approach in the prevention of intimal hyperplasia and restenosis. However, given the wealth of basic and clinical information on the alpha(v)beta(3) integrin and its antagonists, we discuss in this article our new approach to this old solution by targeting a new clinical problem of early failure arteriovenous access for hemodialysis. Given the uniqueness of arteriovenous access in that there are essentially no significant atherosclerotic lesions in the artery and vein prior to the anastomosis, the seminal event of the migration of SMCs from the media to the neointima could by targeted once again with beta(3) integrin antagonists.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Blood Vessels / drug effects*
  • Blood Vessels / injuries
  • Blood Vessels / metabolism
  • Blood Vessels / pathology
  • Blood Vessels / physiopathology
  • Cardiovascular Agents / pharmacology*
  • Cardiovascular Agents / therapeutic use
  • Cell Proliferation / drug effects*
  • Constriction, Pathologic / prevention & control
  • Disease Models, Animal
  • Humans
  • Hyperplasia / prevention & control
  • Integrin alphaVbeta3 / antagonists & inhibitors*
  • Integrin alphaVbeta3 / chemistry
  • Integrin alphaVbeta3 / metabolism
  • Protein Conformation
  • Tunica Intima / drug effects*
  • Tunica Intima / injuries
  • Tunica Intima / metabolism
  • Tunica Intima / pathology
  • Vascular Patency
  • Vascular Surgical Procedures / adverse effects*

Substances

  • Cardiovascular Agents
  • Integrin alphaVbeta3