Combined effect of lipoic acid and doxorubicin in murine leukemia.
Neoplasma
; 46(4): 237-41, 1999.
Article
en En
| MEDLINE
| ID: mdl-10613604
Our experiments indicate that administration of a toxic drug with high rate of free-radical formation (doxorubicin, DOX) combined with an antioxidant (alpha-lipoic acid, LA) may lead to a decrease in drug-toxicity. However, the effects of antioxidant may be concentration-dependent and it is therefore crucial to choose its appropriate dosage. LA at a low concentration (1 micromol/l) acts as a growth factor and at a higher concentration (100 micromol/l) acts as an antiproliferation agent. Both concentrations of LA in combination with DOX were examined in cytotoxic and antitumor effects in L1210 mouse leukemia cells employing a MTT chemosensitivity assay. In most concentration combinations, DOX and LA effect were antagonistic and synergistic action was only found at the higher concentration of both agents (DOX 2.5 micromol/l and LA 100 micromol/l). Use of LA in doxorubicin therapy lead to an increase (though marginally significant) in survival of animals. Combined single-dose administration of DOX (5 mg/kg) and LA (16 mg/kg) lead to super-additive effect of the combination on survival of leukemic mice.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Leucemia L1210
/
Doxorrubicina
/
Ácido Tióctico
Límite:
Animals
Idioma:
En
Revista:
Neoplasma
Año:
1999
Tipo del documento:
Article
Pais de publicación:
Eslovaquia