A photophysical study on the role of bile salt hydrophobicity in solubilizing amphotericin B aggregates.
J Pharm Sci
; 98(11): 4153-60, 2009 Nov.
Article
em En
| MEDLINE
| ID: mdl-19283765
ABSTRACT
Amphotericin B (AmB) is a highly effective antifungal agent and finds utility against a broad spectrum of fungal species. Bile salts are biocompatible biosurfactants, widely used as drug delivery media for many hydrophobic drugs. AmB in the colloidal suspension of sodium deoxycholate (NaDC) is a well-known commercial formulation of AmB. In the present work, the association of AmB with three bile salts, namely sodium cholate, sodium taurodeoxycholate and sodium taurocholate is studied using the photophysical properties of AmB. Selective excitation of monomeric AmB (lambda(ex) 414 nm, lambda(em) 560 nm) and dimeric AmB (lambda(ex) 335 nm, lambda(em) 472 nm) reveal that with increasing concentration of bile salts, the higher aggregates in water disaggregate to form both monomeric and dimeric forms of AmB. This is seen to be a general trend in all the bile salts studied. Results of steady state fluorescence anisotropy and fluorescence lifetimes studies suggest that the interaction between AmB (hydrophobic heptaene face) and bile salts (hydrophobic steroidal face) is essentially hydrophobic.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tensoativos
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Ácidos e Sais Biliares
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Anfotericina B
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Processos Fotoquímicos
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Antifúngicos
Idioma:
En
Revista:
J Pharm Sci
Ano de publicação:
2009
Tipo de documento:
Article