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      1. Author :
        Carlisle, R.; Seymour, L. W.; Coussios, C. C.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
      5. Publication :
        Pharm Res
      6. Products :
      7. Volume :
      8. Issue :
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      10. Research Area :
      11. Keywords :
        IVIS, B16-F10-luc-G5, B16F10-luc-G5, B16-F10-luc, B16F10-luc
      12. Abstract :
        PURPOSE: To improve the delivery of liposomes to tumors using P-selectin glycoprotein ligand 1 (PSGL1) mediated binding to selectin molecules, which are upregulated on tumorassociated endothelium. METHODS: PSGL1 was orientated and presented on the surface of liposomes to achieve optimal selectin binding using a novel streptavidin-protein G linker molecule. Loading of PSGL1 liposomes with luciferin allowed their binding to e-selectin and activated HUVEC to be quantified in vitro and their stability, pharmacokinetics and tumor accumulation to be tested in vivo using murine models. RESULTS: PSGL1 liposomes showed 5-fold (p < 0.05) greater selectin binding than identically formulated control liposomes modified with ligand that did not contain the selectin binding domain. When added to HUVEC, PSGL1 liposomes showed >7-fold (p < 0.001) greater attachment than control liposomes. In in vivo studies PSGL1 liposomes showed similar stability and circulation to control liposomes but demonstrated a >3-fold enhancement in the level of delivery to tumors (p < 0.05). CONCLUSIONS: The technologies and strategies described here may contribute to clinical improvements in the selectivity and efficacy of liposomal drug delivery agents.
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      14. Call Number :
        PKI @ kd.modi @ 19
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