Mithun Varghese , Vadakkan and K , Annapoorna and KC, Sivakumar and Sathish , Mundayoor and GS , Vinod Kumar (2013) Dry powder cationic lipopolymeric nanomicelle inhalation for targeted delivery of antitubercular drug to alveolar macrophage. International journal of nanomedicine, 8. 2871-2885 . ISSN 1178-2013

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Abstract

Excipients having self-assembling properties are less explored in the field of dry powder inhalation (DPI) technology. An amphiphilic lipopolymer system was developed using stearic acid (SA) and branched polyethyleneimine (BPEI) (1800 Dalton), at different proportions by covalent conjugation. A molecular dynamic (MD) simulation tool was employed for predicting the carrier behavior in a polar in vivo condition. The structural characterization was carried out using nuclear magnetic resonance spectroscopy (NMR) and Fourier transform infrared (FTIR) spectroscopy. The physical nature of the lipopolymer was analyzed by differential scanning calorimetry. Determination of zeta potential and diameter of the micelles showed existence of cationic particles in the nano size range when a lower number of primary amino groups of BPEI was grafted with SA. The rifampicin (RIF)-loaded lipopolymer was also formulated further into spray-dried microparticles. Powder X-ray diffraction (PXRD) studies revealed that the RIF API (active pharmaceutical ingredient) exists as molecular dispersion in spray-dried microparticles. Topological analysis of the spray-dried nanomicelle was carried out using scanning electron microscopy (SEM). A large population of the drug-carrying particles were found to be under the inhalable size range (fine particle fraction 67.88% ± 3%). In vitro drug release kinetics from spray-dried nanomicelles were carried out at lung fluid pH.

Item Type:	Article
Uncontrolled Keywords:	molecular dynamics, dry powder inhalation, pulmonary tuberculosis, nanomicelle, lipopolymer, rifampicin
Subjects:	Chemical Biology
Depositing User:	Central Library RGCB
Date Deposited:	02 Feb 2017 08:26
Last Modified:	02 Feb 2017 08:27
URI:	http://rgcb.sciencecentral.in/id/eprint/204

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