| Título: | Design and Pharmaceutical Evaluation of a Nano-Enabled Crosslinked Multipolymeric Scaffold for Prolonged Intracranial Release of Zidovudine |
| Autores: |
Harilall, Sheri-Lee; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Choonara, Yahya E; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Modi, Girish; University of the Witwatersrand, Department of Neurology, Division of Neurosciences, Johannesburg, South Africa Tomar, Lomas K; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Tyagi, Charu; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Kumar, Pradeep; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa du Toit, Lisa C; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Iyuke, Sunny E; University of the Witwatersrand, School of Chemical and Metallurgical Engineering, Johannesburg, South Africa Danckwerts, Michael P; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa Pillay, Viness; University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology, 7 York Road, Parktown, 2193, Johannesburg, South Africa |
| Fecha: | 2013-07-16 |
| Publicador: | Journal of Pharmacy and Pharmaceutical Sciences |
| Fuente: |
 |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: | No aplica |
| Descripción: | Purpose. Nanomedicine explores and allows for the development of drug delivery devices with superior drug uptake, controlled release and fewer drug side-effects. This study explored the use of nanosystems to formulate an implantable drug delivery device capable of sustained zidovudine release over a prolonged period. Methods. Pectin and alginate nanoparticles were prepared by applying a salting out and controlled gelification approach, respectively. The nanoparticles were characterized by attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS) and were further evaluated for zidovudine (AZT) entrapment efficiency. Multipolymeric scaffolds were prepared by crosslinking carboxymethyl cellulose, polyethylene oxide and epsilon caprolactone for entrapment of zidovudine-loaded alginate nanoparticles to impart enhanced controlled release of zidovudine over the time period. Swelling and textural analysis were conducted on the scaffolds. Prepared scaffolds were treated with hydrochloric acid (HCl) to reduce the swelling of matrix in the hydrated environment thereby further controlling the drug release. Drug release studies in phosphate buffered saline (pH 7.4, 37°C) were undertaken on both zidovudine-loaded nanoparticles and native scaffolds containing alginate nanoparticles. Results. A higher AZT entrapment efficiency was observed in alginate nanoparticles. Biphasic release was observed with both nanoparticle formulations, exhibiting an initial burst release of drug within hours of exposure to PBS, followed by a constant release rate of AZT over the remaining 30 days of nanoparticle analysis. Exposure of the scaffolds to HCl served to reduce the drug release rate from the entrapped alginate nanoparticles and extended the AZT release up to 30 days. Conclusions. The crosslinked multipolymeric scaffold loaded with alginate nanoparticles and treated with 1% HCl showed the potential for prolonged delivery of zidovudine over a period of 30 days and therefore may be a potential candidate for use as an implantable device in treating Aids Dementia Complex. This article is open to POST-PUBLICATION REVIEW. Registered readers (see “For Readers”) may comment by clicking on ABSTRACT on the issue’s contents page. |
| Idioma: | Inglés |
1 The Impact of Electronic Prescribing on the Professionalization of Community Pharmacists: A Qualitative Study of Pharmacists’ Perception por Motulsky, Aude; Université de Montréal,Winslade, Nancy; McGill University,Tamblyn, Robyn; McGill University,Sicotte, Claude; Université de Montréal | 6 Effect of Inflammation on Molecular Targets and Drug Transporters por Hanafy, Sherif; Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada,El-Kadi, Ayman O.S.,Jamali, Fakhreddin; Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada |
2 Statins Against Drug-Induced Nephrotoxicity por Dashti-Khavidaki, Simin; Tehran University of Medical Sciences,Moghaddas, Azadeh; Tehran University of Medical Sciences,,Heydari, Behrooz; Tehran University of Medical Sciences,,Khalili, Hossein; Tehran University of Medical Sciences,lessan-Pezeshki, Mahboob; Tehran University of Medical Sciences,,Lessan-Pezeshki, Mahbooh; Tehran University of Medical Sciences | 7 |
3 Hepatotoxic Botanicals - An Evidence-based Systematic Review por Abdualmjid, Reem J; University of Alberta,Sergi, Consolato; University of Alberta | 8 |
4 The Decrease in Farnesoid X Receptor, Pregnane X Receptor and Constitutive Androstane Receptor in the Liver after Intestinal Ischemia-Reperfusion por Ogura, Jiro,Terada, Yusuke,Tsujimoto, Takashi,Koizumi, Takahiro,Kuwayama, Kaori,Maruyama, Hajime,Fujikawa, Asuka,Takaya, Atsushi,Kobayashi, Masaki,Itagaki, Shirou,Takahashi, Natsuko,Hirano, Takeshi,Yamaguchi, Hiroaki,Iseki, Ken | 9 Functional Food and Nutraceutical Registration Processes in Japan and China: A Diffusion of Innovation Perspective por Patel, Darshika; University of Auckland,Dufour, Yvon; University of Auckland,Domigan, Neil; Auctus Limited |
5 HPLC Analysis of Mesembrine-Type Alkaloids in Sceletium Plant Material Used as An African Traditional Medicine por Patnala, Srinivas; Rhodes University,Kanfer, Isadore; Faculty of Pharmacy, Rhodes University | 10 Inhibition of Human Cytochrome P450 Metabolism by Blended Herbal Products and Vitamins por Tam, Teresa W; Centre for Research in Biopharmaceuticals and Biotechnology, University of Ottawa, Ottawa, ON,Akhtar, Humayoun; Guelph Food Research Centre, Agriculture and Agri-Food Canada, Guelph, ON,Arnason, John Thor; Centre for Research in Biopharmaceuticals and Biotechnology, University of Ottawa, Ottawa, ON,Cvijovic, Kosta; Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON,Boon, Heather; Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON,Cameron, D William; Faculty of Medicine, Univeristy of Ottawa, Ottawa, ON,Drouin, Cathy E; Centre for Research in Biopharmaceuticals and Biotechnology, University of Ottawa, Ottawa, ON,Jaeger, Walter; Department of Clinical Pharmacy and Diagnostics, University of Vienna, Vienna,Tsuyuki, Ross T; Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB,Vohra, Sunita; CARE Program, Faculty of Medicine and School of Public Health, University of Alberta, Edmonton, AB,Foster, Brian C; Office of Science, Therapeutic Products Directorate, Health Canada, Ottawa, ON |