Angiogenesis

, Volume 14, Issue 4, pp 431–442 | Cite as

Suppression of neovascularization and experimental arthritis by D-form of anti-flt-1 peptide conjugated with mini-PEG

  • Jin-Sun Kong
  • Seung-Ah Yoo
  • Jong-Hoon Kang
  • Wooree Ko
  • Sangmin Jeon
  • Chi-Bom Chae
  • Chul-Soo Cho
  • Wan-Uk Kim
Original Paper

Abstract

Extensive angiogenesis in the synoviums is a characteristic pathology of rheumatoid arthritis (RA). We have demonstrated that anti-flt-1 hexapeptide, GNQWFI, specifically inhibits the interaction of VEGF or PlGF with its receptor flt-1 (Yoo et al. [13]). In this study, we investigate the feasibility of the synthetic D-form of anti-flt-1 hexapeptide conjugated with 8-amino-3,6-dioxaoctanoic acid (mini-PEG) for treatment of RA. We first modified the structure of anti-flt-1 peptide from the L-form (GNQWFI) to all D-form (gnqwfi; allD) and then conjugated allD with mini-PEG to enhance its stability. The result showed that the allD anti-flt-1 peptide showed an increased stability in the sera without major loss of inhibitory activity. The allD and its mini-PEGylated derivative similarly suppressed wounding migration, chemotaxis, and tube formation of endothelial cells in vitro. However, in the Matrigels assay, the in vivo anti-angiogenic activity of mini-PEGylated allD was stronger than that of native allD or L-form. Moreover, oral and subcutaneous administration of mini-PEGylated allD, but not oral feeding of original L-form, successfully suppressed severity of collagen-induced arthritis. After a single subcutaneous injection, the Cy5-labeled mini-PEGylated allD was found to be distributed systemically and accumulated in arthritic joints of mice, particularly in joints with a severe clinical score. In conclusion, our data suggests that mini-PEGylated allD is more beneficial in the treatment of RA than unmodified anti-flt-1 peptides, since it has increased stability and the possibility of oral delivery, and could be applied to treat angiogenesis-dependent human diseases, including RA.

Keywords

VEGF Anti-flt-1 peptide D-form Mini-PEG Angiogenesis Chronic arthritis 

Supplementary material

10456_2011_9226_MOESM1_ESM.docx (611 kb)
Supplementary material 1 (DOCX 611 kb)

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Jin-Sun Kong
    • 1
  • Seung-Ah Yoo
    • 1
  • Jong-Hoon Kang
    • 2
  • Wooree Ko
    • 3
  • Sangmin Jeon
    • 3
  • Chi-Bom Chae
    • 2
  • Chul-Soo Cho
    • 1
    • 4
  • Wan-Uk Kim
    • 1
    • 4
  1. 1.Research Institute of Immunobiology, Catholic Research Institute of Medical ScienceSeoulKorea
  2. 2.Postech-Catholic Biomedical Engineering InstituteCatholic University of KoreaSeoulKorea
  3. 3.Department of Chemical EngineeringPohang University of Science and TechnologyPohangKorea
  4. 4.Division of Rheumatology, Department of Internal Medicine, School of MedicineCatholic University of KoreaSuwonSouth Korea

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