Local acting Sticky-trap inhibits vascular endothelial growth factor dependent pathological angiogenesis in the eye

EMBO Mol Med. 2014 May;6(5):604-23. doi: 10.1002/emmm.201303708.

Abstract

Current therapeutic antiangiogenic biologics used for the treatment of pathological ocular angiogenesis could have serious side effects due to their interference with normal blood vessel physiology. Here, we report the generation of novel antivascular endothelial growth factor-A (VEGF) biologics, termed VEGF "Sticky-traps," with unique properties that allow for local inhibition of angiogenesis without detectable systemic side effects. Using genetic and pharmacological approaches, we demonstrated that Sticky-traps could locally inhibit angiogenesis to at least the same extent as the original VEGF-trap that also gains whole-body access. Sticky-traps did not cause systemic effects, as shown by uncompromised wound healing and normal tracheal vessel density. Moreover, if injected intravitreally, recombinant Sticky-trap remained localized to various regions of the eye, such as the inner-limiting membrane and ciliary body, for prolonged time periods, without gaining access either to the photoreceptors/choriocapillaris area or the circulation. These unique pharmacological characteristics of Sticky-trap could allow for safe treatment of pathological angiogenesis in patients with diabetic retinopathy and retinopathy of pre-maturity.

Publication types

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

MeSH terms

  • Biological Products / adverse effects
  • Biological Products / metabolism*
  • Biological Products / pharmacokinetics
  • Eye / drug effects*
  • Humans
  • Neovascularization, Pathologic / prevention & control*
  • Receptors, Vascular Endothelial Growth Factor / adverse effects
  • Receptors, Vascular Endothelial Growth Factor / metabolism*
  • Receptors, Vascular Endothelial Growth Factor / pharmacokinetics
  • Recombinant Fusion Proteins / adverse effects
  • Recombinant Fusion Proteins / metabolism*
  • Recombinant Fusion Proteins / pharmacokinetics
  • Recombinant Proteins / adverse effects
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Recombinant Proteins / pharmacokinetics
  • Vascular Endothelial Growth Factor A / genetics
  • Vascular Endothelial Growth Factor A / metabolism*

Substances

  • Biological Products
  • Recombinant Fusion Proteins
  • Recombinant Proteins
  • VEGFA protein, human
  • Vascular Endothelial Growth Factor A
  • aflibercept
  • Receptors, Vascular Endothelial Growth Factor