Self-assembled biotransesterified cyclodextrins as Artemisinin nanocarriers - I: formulation, lyoavailability and in vitro antimalarial activity assessment.
Eur J Pharm Biopharm
; 80(3): 508-17, 2012 Apr.
Article
en En
| MEDLINE
| ID: mdl-22226681
We recently reported a one-step transesterification of cyclodextrins (CDs) by vinyl-acyl fatty esters catalyzed by thermolysin. By using the solvent displacement method and depending on the experimental conditions, the CD derivatives grafted with decanoic alkyl chains (CD-C(10)) yielded either nanosphere or nanoreservoir-type systems with a size ranging from 70 to 220 nm. Both types of nanostructures were able to associate artemisinin (ART), a well-known antimalarial lipophilic drug. The formulation parameters were optimized to reach stable and high ART dosage corresponding to drug levels of 0.3 and 1.6 mg mL(-1) in the colloidal suspension, for the spherical and reservoir-type nanosystems, respectively. PEG surface-decorated nanoparticles were also prepared by co-nanoprecipitation of PEG fatty acid esters and CD-C(10) molecules. The integration of the PEGylated amphiphiles within the CD-C(10) nanostructures did not influence the ART lyoavailability. Both types of ART-loaded nanosystems showed a sustained in vitro release profile over 96 (nanoreservoirs) and 240 h (nanospheres). Finally, the in vitro antimalarial activity was evaluated using the lactate dehydrogenase assay. ART-containing colloidal suspensions inhibited the growth of cultured Plasmodium falciparum, both multi-resistant K1 and susceptible 3D7 strains with IC(50) values (2.8 and 7.0 ng mL(-1)) close to those of reference ART solution. These colloidal nanosystems based on CD derivatives and containing ART may provide a promising alternative formulation for injectable use of ART.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ciclodextrinas
/
Artemisininas
/
Nanopartículas
/
Antimaláricos
Idioma:
En
Revista:
Eur J Pharm Biopharm
Asunto de la revista:
FARMACIA
/
FARMACOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Países Bajos