Enhanced sonophoretic delivery of 5-aminolevulinic acid: preliminary human ex vivo permeation data.
Skin Res Technol
; 19(1): e283-9, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-22672142
ABSTRACT
BACKGROUND/AIMS:
5-Aminolevulinate (ALA) is an important photodynamic therapy drug for the treatment of actinic keratoses and other non-melanoma skin cancers in cosmetically sensitive areas. One limitation of this drug is a relatively high recurrence rate. Our aim was to evaluate the feasibility of ultrasound augmented ALA delivery in excised human skin. MATERIALS ANDMETHODS:
An ultrasonic delivery device was used to enhance radiolabelled ALA into excised skin. Quantification of ALA was performed after passive and ultrasonic ALA delivery. Transepidermal water loss was used as a measure of barrier function before and after ultrasonic treatment.RESULTS:
We found that ultrasonic treatment dramatically increased the mean cumulative amount of ALA to P< 0.0001 from 4 to 8 h when compared to passive ALA treatment. The flux was calculated to be 54.8 ± 8.0 µg/cm(2) h with ultrasound treatment. TEWL increased nearly two-fold, from 12.3 to 21.0, after ultrasound treatment.CONCLUSION:
Our study supports the use of ultrasound for improved ALA delivery by showing significant improvements in the cumulative drug load and flux via combined ultrasound and ALA treatment.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fotoquimioterapia
/
Ultrassom
/
Sistemas de Liberação de Medicamentos
/
Fármacos Fotossensibilizantes
/
Ácido Aminolevulínico
Limite:
Humans
Idioma:
En
Revista:
Skin Res Technol
Assunto da revista:
DERMATOLOGIA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Austrália