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Comparative study of Mg/Al- and Zn/Al-layered double hydroxide-perindopril erbumine nanocomposites for inhibition of angiotensin-converting enzyme

Authors Hussein Al Ali SH, Al-Qubaisi M, Hussein MZ, Ismail M, Zainal Z, Hakim MN

Received 27 March 2012

Accepted for publication 25 April 2012

Published 3 August 2012 Volume 2012:7 Pages 4251—4262

DOI https://doi.org/10.2147/IJN.S32267

Review by Single-blind

Peer reviewer comments 3

Samer Hasan Hussein Al Ali,1 Mothanna Al-Qubaisi,2 Mohd Zobir Hussein,1,3 Maznah Ismail,2,4 Zulkarnain Zainal,1 Muhammad Nazrul Hakim5

1Department of Chemistry, Faculty of Science, 2Laboratory of Molecular Biomedicine, Institute of Bioscience, 3Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology, 4Department of Nutrition and Health Science, 5Department of Biomedical Science, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Selangor, Malaysia

Abstract: The intercalation of a drug active, perindopril, into Mg/Al-layered double hydroxide for the formation of a new nanocomposite, PMAE, was accomplished using a simple ion exchange technique. A relatively high loading percentage of perindopril of about 36.5% (w/w) indicates that intercalation of the active took place in the Mg/Al inorganic interlayer. Intercalation was further supported by Fourier transform infrared spectroscopy, and thermal analysis shows markedly enhanced thermal stability of the active. The release of perindopril from the nanocomposite occurred in a controlled manner governed by pseudo-second order kinetics. MTT assay showed no cytotoxicity effects from either Mg/Al-layered double hydroxide or its nanocomposite, PMAE. Mg/Al-layered double hydroxide showed angiotensin-converting enzyme inhibitory activity, with 5.6% inhibition after 90 minutes of incubation. On incubation of angiotensin-converting enzyme with 0.5 µg/mL of the PMAE nanocomposite, inhibition of the enzyme increased from 56.6% to 70.6% at 30 and 90 minutes, respectively. These results are comparable with data reported in the literature for Zn/Al-perindopril.

Keywords: magnesium, aluminum, layered double hydroxide, perindopril erbumine, ion exchange, angiotensin-converting enzyme, Chang cells line

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