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Omega-3 Fatty Acid Grafted PAMAM-Paclitaxel Conjugate Exhibits Enhanced Anticancer Activity in Upper Gastrointestinal Cancer Cells.
Macromolecular Bioscience 2017 August
Upper Gastrointestinal Cancers (UGCs) are a leading cause of cancer-related deaths worldwide. Paclitaxel (PTX) is frequently used for the treatment of UGCs; however, low bioavailability, reduced solubility, and dose-dependent toxicity impede its therapeutic use. PAMAMG4.0 -NH2 -DHA is synthesized by linking amine-terminated fourth-generation poly(amidoamine) (PAMAMG4.0 -NH2 ) dendrimers with omega-3 fatty acid docosahexaenoic acid (DHA). Next, PAMAMG4.0 -NH2 -DHA-PTX (DHATX) and PAMAMG4.0 -NH2 -PTX (PAX) conjugates are synthesized by subsequent covalent binding of PTX with PAMAMG4.0 -NH2 -DHA and PAMAMG4.0 -NH2 , respectively. 1 H-NMR and MALDI-TOF analyses are performed to confirm conjugation of DHA to PAMAMG4.0 -NH2 and PTX to PAMAMG4.0 -NH2 -DHA. The cell viability, clonogenic cell survival, and flow cytometry analyses are used to determine the anticancer activity of PTX, PAX, and DHATX in UGC cell lines. The in vitro data indicate that treatment with DHATX is significantly more potent than PTX or PAX at inhibiting cellular proliferation, suppressing long-term survival, and inducing cell death in UGC cells.
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