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Anti-Cancer Drugs:
doi: 10.1097/CAD.0b013e328334560f
Preclinical Reports

Targeting the efficacy of a dendrimer-based nanotherapeutic in heterogeneous xenograft tumors in vivo

Myc, Andrzej; Kukowska-Latallo, Jolanta; Cao, Peter; Swanson, Ben; Battista, Julianna; Dunham, Thomas; Baker, James R. Jr

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Abstract

Our earlier studies have shown the in vitro and in vivo targeting of a generation 5 (G5) dendrimer-based multifunctional conjugate that contained folic acid (FA) as the targeting agent and methotrexate (MTX) as the chemotherapeutic drug. To clinically apply the synthesized G5-FA-MTX nanotherapeutic, it is important that the anticancer conjugate elicits cytotoxicity specifically and consistently. Toward this objective, we evaluated the large-scale synthesis of a G5-FA-MTX conjugate (Lot # 123–34) for its cytotoxic potential and specificity in vitro and in vivo. The cytotoxicity and specificity were tested by using a coculture assay in which FA receptor-expressing and nonexpressing cells (KB and SK-BR-3 cells, respectively) were cultured together and preferential killing was examined. The in-vitro data were compared with the in-vivo data obtained from a heterogeneous xenograft tumor model. The animal model of the artificial heterogeneous xenograft tumor showed that the nanotherapeutic was preferentially cytotoxic to KB cells.

© 2010 Lippincott Williams & Wilkins, Inc.

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