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      1. Author :
        Ackermann, M.; Carvajal, I.M.; Morse, B.A.; Moreta, M.; O'Neil, S.; Kossodo, S.; Peterson, J.D.; Delventhal, V.; Marsh, H.N.; Furfine, E.S.; Konerding, M.A.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2011
      5. Publication :
        International Journal of Oncology
      6. Products :
      7. Volume :
        38
      8. Issue :
        1
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        AngioSense 680; anti-angiogenic; anti-tumorigenic; Cancer; FMT1 (VisEn); FMT-Solaris; In vivo imaging (VisEn); intraperitoneal injection; mice
      12. Abstract :
        Antiangiogenesis has become a promising pillar in modern cancer therapy. This study investigates the antiangiogenic effects of the PEGylated Adnectin[TM], CT-322, in a murine Colo-205 xenograft tumor model. CT-322 specifically binds to and blocks vascular endothelial growth factor receptor (VEGFR-2). Adnectins are a novel class of targeted biologics engineered from the 10th domain of human fibronectin. CT-322 treated tumors exhibited a significant reduction in tumor growth of 69%, a 2.8 times lower tumor surface area and fewer necrotic areas. Control tumors showed a 2.36-fold higher microvessel density (MVD) and a 2.42 times higher vessel volume in corrosion casts. The vascular architecture in CT-322-treated tumors was characterized by a strong normalization of vasculature. This was quantified in corrosion casts of CT-322 treated tumors in which the intervascular distance (a reciprocal parameter indicative of vessel density) and the distance between two consecutive branchings were assessed, with these distances being 2.21 times and 2.37 times greater than in controls, respectively. Fluorescence molecular tomography (FMT) equally affirmed the inhibitory effects of CT-322 on tumor vasculature as indicated by a 60% reduction of the vascular probe, AngioSense, accumulating in tumor tissue, as a measurement of vascular permeability. Moreover, AngioSense accumulation was reduced as early as 24 h after starting treatment. The sum of these effects on tumor vasculature illustrates the anti-angiogenic mechanism underlying the antitumor activity of CT-322 and provides support for further evaluation of this Adnectin in combinatorial strategies with standard of care therapies.
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/21109927
      14. Call Number :
        PKI @ user @ 8449
      15. Serial :
        4804
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