Combination of arginine deprivation with TRAIL treatment as a targeted-therapy for mesothelioma.
Anticancer Res
; 34(12): 6991-9, 2014 Dec.
Article
en En
| MEDLINE
| ID: mdl-25503125
ABSTRACT
UNLABELLED In the present study we present data to show that certain tumor cells including malignant pleural mesothelioma (MPM) cells do not express argininosuccinate synthetase (ASS), and thus are unable to synthesize arginine from citrulline. Exposure of these ASS-negative cells to the arginine degrading enzyme, arginine deiminase (ADI-PEG20), for 72 h results in significant increases in cleaved caspase-3. Importantly, this apoptotic signal is further strengthened by the addition of TNF-related apoptosis-inducing ligand (TRAIL). Using flow cytometry, we showed that the combination treatment (ADI-PEG20 at 50 ng/ml and TRAIL at 10 ng/ml) for 24 h resulted in profound cell death with 67% of cells positive for caspase-3 activity, while ADI-PEG20 alone or TRAIL alone resulted in only 10-15% cell death. This positive amplification loop is mediated through the cleavage of proapototic protein "BID". CONCLUSION:
Our work represents a new strategy for treating patients with malignant pleural mesothelioma using targeted molecular therapeutics based on selected tumor markers, thus avoiding the use of potentially cytotoxic chemotherapy.Palabras clave
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Arginina
/
Polietilenglicoles
/
Ligando Inductor de Apoptosis Relacionado con TNF
/
Terapia Molecular Dirigida
/
Hidrolasas
/
Mesotelioma
Límite:
Humans
Idioma:
En
Revista:
Anticancer Res
Año:
2014
Tipo del documento:
Article
País de afiliación:
Estados Unidos