Systemic Nanocurcumin for Pancreatic Cancer Therapy

Johns Hopkins University, Baltimore MD

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Abstract

Curcumin, a yellow polyphenol compound found in the Indian spice turmeric (Curcuma longa) demonstrates potent anti-cancer effects against a wide variety of human tumor models in preclinical studies. A major pitfall forthe application of curcumin to human cancer therapy has been its limited systemic bioavailability, such that the few clinical trials conducted so far had administered mega doses (8-10 grams) of free curcumin daily to pafients in order to yield detectable levels. These high dosages significanfiy affect patient compliance and have stymied the application of this promising, and relafively non-toxic, agent to most visceral malignancies that would mandate high plasma levels of the active therapeutic. A novel nanoparticle encapsulated formulation of curcumin (nanocurcumin) has been engineered which bypasses the bioavailability pitfall of this compound, and enables strikingly higher circulafing and tissue levels upon parenteral administrafion. Nanocurcumin causes significant growth reduction of subcutaneous and orthotopic pancreatic cancer xenografts, and abrogates systemic metastases when co-administered with gemcitabine in a spontaneously metastatic animal model. The studies proposed herein have the overarching goal of performing the efficacy, pharmacokinetics, and toxicity data required for filing an invesfigafional new drug (IND) application with the USFDA. To this effect, nanocurcumin (as single agent or in combination with gemcitabine) will be tested in a panel of low-passage gemcitabine-resistant patientderived orthotopic xenografts (Aim 1) and in a uniformly lethal genetically engineered mouse model (Aim 2), and will undergo regulatory grade in vitro and in vivo toxicology testing by the federally-funded Nanotechnology Characterization Laboratory (NCL) (Aim 3), in preparation for a pre-IND application. Two hypothesis-driven aims that integrate unique CCNE resources will also be pursued, including the effects of nanocurcumin on vaccine efficacy and quantifiable measures of cellular immune response (Aim 4; in collaboration with Project 3) and engineering the next generafion of active-targeted anfibody-conjugated nanocurcumin (Aim 6; in collaboration with the Nanoparticle Engineering and the Validafion Cores).