Abstract
One of perspective approaches in treatment of hematological malignancies is activation of death receptors for TRAIL. However, leukemia cells studied to date have shown variable susceptibility to TRAIL. Our study demonstrates that cells of acute T-lymphoblastic leukemia MOLT-4 are resistant to TRAIL and that ionizing radiation in the therapeutically achievable dose of 1 Gy sensitizes TRAIL-resistant cells MOLT-4 to the TRAIL-induced apoptosis by increase in death receptors for TRAIL DR5. When TRAIL is applied after the irradiation in the time of increased DR5 positivity more efficient cell killing is achieved.
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