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Anticancer nanodelivery system with controlled release property based on protocatechuate–zinc layered hydroxide nanohybrid

Authors Barahuie F, Hussein MZ, Abd Gani S, Fakurazi S, Zainal Z

Received 20 December 2013

Accepted for publication 15 March 2014

Published 26 June 2014 Volume 2014:9(1) Pages 3137—3149

DOI https://doi.org/10.2147/IJN.S59541

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Farahnaz Barahuie,1 Mohd Zobir Hussein,1 Shafinaz Abd Gani,2,3 Sharida Fakurazi,3,4 Zulkarnain Zainal1

1
Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 2Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 3Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 4Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia

Background: We characterize a novel nanocomposite that acts as an efficient anticancer agent.
Methods: This nanocomposite consists of zinc layered hydroxide intercalated with protocatechuate (an anionic form of protocatechuic acid), that has been synthesized using a direct method with zinc oxide and protocatechuic acid as precursors.
Results: The resulting protocatechuic acid nanocomposite (PAN) showed a basal spacing of 12.7 Å, indicating that protocatechuate was intercalated in a monolayer arrangement, with an angle of 54° from the Z-axis between the interlayers of the zinc layered hydroxide, and an estimated drug loading of about 35.7%. PAN exhibited the properties of a mesoporous type material, with greatly enhanced thermal stability of protocatechuate as compared to its free counterpart. The presence of protocatechuate in the interlayers of the zinc layered hydroxide was further supported by Fourier transform infrared spectroscopy. Protocatechuate was released from PAN in a slow and sustained manner. This mechanism of release was well represented by a pseudo-second order kinetics model. PAN has shown increased cytotoxicity compared to the free form of protocatechuic acid in all cancer cell lines tested. Tumor growth suppression was extensive, particularly in HepG2 and HT29 cell lines.
Conclusion: PAN is suitable for use as a controlled release formulation, and our in vitro evidence indicates that PAN is an effective anticancer agent. PAN may have potential as a chemotherapeutic drug for human cancer.

Keywords: protocatechuic acid, nanocomposite, zinc layered hydroxide, zinc oxide, 3T3, HepG2, HeLa, HT29

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