Synergy between parthenolide and arsenic trioxide in adult T-cell leukemia/lymphoma cells. - GreenMedInfo Summary
Synergy between parthenolide and arsenic trioxide in adult T-cell leukemia/lymphoma cells.
Iran J Basic Med Sci. 2020 May ;23(5):616-622. PMID: 32742599
Objectives: Adult T-cell leukemia/lymphoma (ATLL) is an aggressive lymphoid malignancy with low survival rate and distinct geographical distribution. In search for novel chemotherapeutics against ATLL, we investigated the combinatorial effects of parthenolide, a sesquiterpene lactone with valuable pharmaceutical activities, and arsenic trioxide (ATO).
Materials and Methods: MT2 cells, an ATLL cell line, were treated with increasing concentrations of parthenolide (1.25, 2.5, and 5μg/ml) and ATO (2, 4, 8, and 16 µM) to determine their IC. Then, cells were treated with a combination of sub-ICconcentrations of parthenolide (1μg/ml) and ATO (2 µM) for 72 hr. Cell viability and cell cycle changes were assessed by Alamar blue and PI staining, respectively. To understand the mechanisms responsible for observed effects, expression of, andwere investigated by real-time PCR.
Results: Assessment of cell viability indicated that parthenolide significantly increased the toxicity of ATO, as confirmed by accumulation of MT2 cells in the sub G1 phase of the cell cycle. Moreover, molecular analysis revealed significant down-regulation of, andupon combinatorial administration of parthenolide and ATO in comparison with relevant controls.
Conclusion: Taken together, present results showed that parthenolide significantly enhanced the toxicity of ATO in MT2 cells. Therefore, the future possible clinical impact of our study could be combinatorial use of parthenolide and ATO as a novel and more effective approach for ATLL.