Journal Article

Subcutaneous nanoparticle-based antitubercular chemotherapy in an experimental model

Rajesh Pandey and G. K. Khuller

in Journal of Antimicrobial Chemotherapy

Published on behalf of British Society for Antimicrobial Chemotherapy

Volume 54, issue 1, pages 266-268
Published in print July 2004 | ISSN: 0305-7453
Published online July 2004 | e-ISSN: 1460-2091 | DOI:
Subcutaneous nanoparticle-based antitubercular chemotherapy in an experimental model

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  • Medical Oncology
  • Critical Care


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Poly (dl-lactide-co-glycolide) (PLG) nanoparticles encapsulating three front-line antitubercular drugs, i.e. rifampicin, isoniazid and pyrazinamide, were prepared by the multiple emulsion technique and administered subcutaneously to mice for pharmacokinetic/chemotherapeutic study. A single subcutaneous dose of drug-loaded PLG nanoparticles resulted in sustained therapeutic drug levels in the plasma for 32 days and in the lungs/spleen for 36 days. The mean residence time and absolute bioavailability were increased several-fold as compared with unencapsulated drugs. Further, drug-loaded PLG nanoparticles resulted in undetectable bacterial counts in the lungs and spleen of Mycobacterium tuberculosis-infected mice, thereby demonstrating a better chemotherapeutic efficacy, as compared with daily free drug treatment. Hence, injectable PLG nanoparticles hold promise for increasing drug bioavailability and reducing dosing frequency for better management of tuberculosis.

Keywords: poly (dl-lactide-co-glycolide); tuberculosis; bioavailability

Journal Article.  1407 words. 

Subjects: Medical Oncology ; Critical Care

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