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Critical Reviews™ in Therapeutic Drug Carrier Systems
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ISSN Imprimer: 0743-4863
ISSN En ligne: 2162-660X

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Critical Reviews™ in Therapeutic Drug Carrier Systems

DOI: 10.1615/CritRevTherDrugCarrierSyst.v21.i5.20
36 pages

PLGA Nanoparticles in Drug Delivery: The State of the Art

Indu Bala
Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India
Sarita Hariharan
Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India
M. N. V. Ravi Kumar
Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India

RÉSUMÉ

Nanoparticles represent drug delivery systems suitable for most administration routes. Over the years, a variety of natural and synthetic polymers have been explored for the preparation of nanoparticles, of which Poly(lactic acid) (PLA), Poly(glycolic acid) (PGA), and their copolymers (PLGA) have been extensively investigated because of their biocompatibility and biodegradability. Nanoparticles act as potential carries for several classes of drugs such as anticancer agents, antihypertensive agents, immunomodulators, and hormones; and macromolecules such as nucleic acids, proteins, peptides, and antibodies. The options available for preparation have increased with advances in traditional methods, and many novel techniques for preparation of drug-loaded nanoparticles are being developed and refined. The various methods used for preparation of nanoparticles with their advantages and limitations have been discussed. The crux of the problem is the stability of nanoparticles after preparation, which is being addressed by freeze-drying using different classes of lyoprotectants. Nanoparticles can be designed for the site-specific delivery of drugs. The targeting capability of nanoparticles is influenced by particle size, surface charge, surface modification, and hydrophobicity. Finally, the performance of nanoparticles in vivo is influenced by morphological characteristics, surface chemistry, and molecular weight. Careful design of these delivery systems with respect to target and route of administration may solve some of the problems faced by new classes of active molecules.


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