Efficacies of cyclodextrin-complexed and liposome-encapsulated clarithromycin against Mycobacterium avium complex infection in human macrophages

ORCiD

Nejat Düzgüneş: 0000-0001-6159-1391

Department

Biomedical Sciences

Document Type

Article

Publication Title

International Journal of Pharmaceutics

ISSN

0378-5173

Volume

250

Issue

2

DOI

10.1016/S0378-5173(02)00552-5

First Page

403

Last Page

414

Publication Date

1-16-2003

Abstract

Cyclodextrins and liposomes have been used in recent years as drug delivery vehicles, improving the bioavailability and therapeutic efficacy of many poorly water-soluble drugs. In this study, we used two approaches to enhance the availability of the poorly water-soluble antibiotic, clarithromycin, by inclusion complex formation and by liposome-encapsulation. We examined the efficacies of these formulations against Mycobacterium avium complex (MAC) in human peripheral blood monocyte-derived macrophages. The water solubility of clarithromycin was enhanced by about 700-fold by complexation with cyclodextrin. The use of a rapid radiometric (BACTEC) method for the detection of MAC growth and susceptibility showed identical MICs against MAC for both the free and complexed drug. The anti-MAC efficacy of the cyclodextrin complex of clarithromycin in macrophages was slightly lower than the free drug, probably due to the high stability of the inclusion complex. At higher drug concentrations, Liposome-encapsulated clarithromycin was slightly more effective against intracellular MAC growth than the free drug. © 2002 Elsevier Science B.V. All rights reserved.

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