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Bhardwaj A.,Nanomedicine Research Center
Artificial cells, nanomedicine, and biotechnology (Print) | Year: 2013

Tuberculosis (TB) remains one of the oldest and deadliest diseases in the current scenario. The intracellular organism Mycobacterium tuberculosis, which mainly resides in mononuclear phagocytes, is responsible for tuberculosis in humans. A few therapies are available for the treatment of tuberculosis but they have many hurdles. To overcome these hurdles, a combination of chemotherapeutic agent-loaded vesicular systems have been prepared to overcome tuberculosis. To investigate the role of novel drug delivery systems for the treatment of pulmonary tuberculosis, ligand appended liposomals have been developed. In the present study, drug-loaded, ligand-appended liposomes and their DPI (Dry Powder Inhaler) forms have been prepared and characterized using various in vitro and in vivo parameters. The prepared ligand-appended liposomal formulation showed good entrapment efficiency, prolonged drug release, improved recovery of drugs from the target site, and proved to be more suitable for use as DPI, justifying their potential for improved drug delivery. Thus we tried our best by our project to reduce the national burden of tuberculosis, which is still a global health challenge.

Hosseinkhani H.,National Taiwan University of Science and Technology | Chen Y.-R.,National Yang Ming University | He W.,National Taiwan University of Science and Technology | Hong P.-D.,National Taiwan University of Science and Technology | And 2 more authors.
Journal of Nanoparticle Research | Year: 2013

This study aims to engineer novel targeted delivery system composed of magnetic DNA nanoparticles to be effective as an efficient targeted gene therapy vehicle for tumor therapy. A polysaccharide, dextran, was chosen as the vector of plasmid DNA-encoded NK4 that acts as an HGF-antagonist and anti-angiogenic regulator for inhibitions of tumor growth, invasion, and metastasis. Spermine (Sm) was chemically introduced to the hydroxyl groups of dextran to obtain dextran-Sm. When Fe2+ solution was added to the mixture of dextran-Sm and a plasmid DNA, homogenous DNA nanoparticles were formed via chemical metal coordination bonding with average size of 230 nm. Characterization of DNA nanoparticles was performed via dynamic light scattering measurement, electrophoretic light scattering measurement, as well as transmission electron microscope. DNA nanoparticles effectively condensed plasmid DNA into nanoparticles and enhanced the stability of DNA, while significantly improved transfection efficiency in vitro and tumor accumulation in vivo. In addition, magnetic DNA nanoparticles exhibited high efficiency in antitumor therapy with regards to tumor growth as well as survival of animals evaluated in the presence of external magnetic field. We conclude that the magnetic properties of these DNA nanoparticles would enhance the tracking of non-viral gene delivery systems when administrated in vivo in a test model. These findings suggest that DNA nanoparticles effectively deliver DNA to tumor and thereby inhibiting tumor growth. © 2013 Springer Science+Business Media Dordrecht.

Khan W.,Hebrew University of Jerusalem | Hosseinkhani H.,National Taiwan University of Science and Technology | Ickowicz D.,Hebrew University of Jerusalem | Hong P.-D.,National Taiwan University of Science and Technology | And 2 more authors.
Acta Biomaterialia | Year: 2012

Gene delivery is a promising technique that involves in vitro or in vivo introduction of exogenous genes into cells for experimental and therapeutic purposes. Successful gene delivery depends on the development of effective and safe delivery vectors. Two main delivery systems, viral and non-viral gene carriers, are currently deployed for gene therapy. While most current gene therapy clinical trials are based on viral approaches, non-viral gene medicines have also emerged as potentially safe and effective for the treatment of a wide variety of genetic and acquired diseases. Non-viral technologies consist of plasmid-based expression systems containing a gene associated with the synthetic gene delivery vector. Polysaccharides compile a large family of heterogenic sequences of monomers with various applications and several advantages as gene delivery agents. This chapter, compiles the recent progress in polysaccharide based gene delivery, it also provides an overview and recent developments of polysaccharide employed for in vitro and in vivo delivery of therapeutically important nucleotides, e.g. plasmid DNA and small interfering RNA. © 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Aggarwal S.,Nanomedicine Research Center | Yadav S.,Nanomedicine Research Center | Gupta S.,Nanomedicine Research Center
Journal of Biomedical Nanotechnology | Year: 2011

The present study aimed to prepare and characterize anti EGFR monoclonal antibody (mab) conjugated Gemcitabine loaded PLGA nanoparticles for their selective delivery to pancreatic cells and evaluation of the systems in vitro. It was observed that direct covalent coupling of antibodies to glutaraldehyde activated nanoparticles is an appropriate method to achieve cell-type specific drug carrier systems based on polymeric nanoparticles that have potential to be applied for targeted chemotherapy in EGFR positive cancer. Copyright © 2011 American Scientific Publishers All rights reserved.

Sharma S.,Nanomedicine Research Center | Kumar P.,Nanomedicine Research Center | Jaiswal A.,CSIR - Central Electrochemical Research Institute | Dube A.,CSIR - Central Electrochemical Research Institute | Gupta S.,Nanomedicine Research Center
Journal of Biomedical Nanotechnology | Year: 2011

Visceral leishmaniasis (VL) is the most severe of all the forms of leishmaniasis and usually lethal if untreated. The present work aimed to develop and characterize doxorubicin loaded mannan conjugated microparticles against experimental visceral leishmaniasis for selective and targeted delivery of doxorubicin to the macrophages of liver and spleen for the effective chemotherapy of VL. Macrophage targeting using doxorubicin loaded PLGA-microparticles would certainly improve the chemotherapy with reduced side effects against VL. Copyright © 2011 American Scientific Publishers All rights reserved.

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