styrene maleic acid-encapsulated paclitaxel micelles: antitumor activity and toxicity studies following oral administration in a murine orthotopic colon cancer model
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2016
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Abstract
Neha N Parayath,1 Hayley Nehoff,1 Samuel E Norton,2 Andrew J Highton,2 Sebastien Taurin,1,3 Roslyn A Kemp,2 Khaled Greish1,4 1Department of Pharmacology and Toxicology, 2Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand; 3Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, USA; 4Princess Al-Jawhara Centre for Molecular Medicine, Arabian Gulf University, Manama, Kingdom of Bahrain Abstract: Oral administration of paclitaxel (PTX), a broad spectrum anticancer agent, is challenged by its low uptake due to its poor bioavailability, efflux through P-glycoprotein, and gastrointestinal toxicity. We synthesized PTX nanomicelles using poly(styrene-co-maleic acid) (SMA). Oral administration of SMA-PTX micelles doubled the maximum tolerated dose (60 mg/kg vs 30 mg/kg) compared to the commercially available PTX formulation (PTX [Ebewe]). In a murine orthotopic colon cancer model, oral administration of SMA-PTX micelles at doses 30 mg/kg and 60 mg/kg reduced tumor weight by 54% and 69%, respectively, as compared to the control group, while no significant reduction in tumor weight was observed with 30 mg/kg of PTX (Ebewe). In addition, toxicity of PTX was largely reduced by its encapsulation into SMA. Furthermore, examination of the tumors demonstrated a decrease in the number of blood vessels. Thus, oral delivery of SMA-PTX micelles may provide a safe and effective strategy for the treatment of colon cancer. Keywords: oral delivery, anticancer nanomedicine, CT-26, enhanced permeability and retention (EPR) effect, HUVEC, antiangiogenic
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nn2016internationalstyrene
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| Authors | ;Parayath NN;Nehoff H;Norton SE;Highton AJ;Taurin S;Kemp RA;Greish K |
| Journal | nonlinear analysis: real world applications |
| Year | 2016 |
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