Targeting microparticles to select tissue via radiation-induced upregulation of endothelial cell adhesion molecules.
Pharm Res
; 19(9): 1317-22, 2002 Sep.
Article
em En
| MEDLINE
| ID: mdl-12403068
ABSTRACT
PURPOSE:
Certain endothelial cell adhesion molecules are up regulated in tissue that has been irradiated for therapeutic purposes. This up-regulation of adhesion molecules provides a potential avenue for targeting drugs to select tissues.METHODS:
Microspheres were coated with a mAb to ICAM-1 and the level of adhesion of the anti-ICAM-1 microspheres to irradiated tissue in vitro and in vivo was quantified.RESULTS:
Under in vitro flow conditions, the number of adherent microspheres on irradiated HUVEC was 4.8 +/- 0.9 times that of control; the adhesion of anti-ICAM-1 microspheres on irradiated HUVEC could be enhanced by more than 170% in the presence of RBC (20% hematocrit) in the medium. In vivo in a rat cranial window model, the number of adherent anti-ICAM-1 microspheres in locally irradiated cerebral tissue was 8 and 13 times that of IgG microspheres at 24 h and 48 h post-irradiation, respectively and returned to baseline 7 days post-irradiation. In locally irradiated animals, the number of adhering microspheres in unirradiated tissue remained at the basal level.CONCLUSIONS:
Radiation-induced up-regulation of endothelial cell adhesion molecules may be exploited to target drugs and/or genes to select segments of the endothelium.
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Coleções:
01-internacional
Temas:
Agentes_cancerigenos
Base de dados:
MEDLINE
Assunto principal:
Endotélio Vascular
/
Moléculas de Adesão Celular
/
Regulação para Cima
/
Sistemas de Liberação de Medicamentos
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Pharm Res
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Estados Unidos