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Evaluation of artemisinins for the treatment of acute myeloid leukemia.


ABSTRACT: Investigate antileukemic activity of artemisinins, artesunate (ART), and dihydroartemisinin (DHA), in combination with cytarabine, a key component of acute myeloid leukemia (AML) chemotherapy using in vitro and in vivo models.Using ten human AML cell lines, we conducted a high-throughput screen to identify antimalarial agents with antileukemic activity. We evaluated effects of ART and DHA on cell viability, cytotoxicity, apoptosis, lysosomal integrity, and combination effects with cytarabine in cell lines and primary patient blasts. In vivo pharmacokinetic studies and efficacy of single-agent ART or combination with cytarabine were evaluated in three xenograft models.ART and DHA had the most potent activity in a panel of AML cell lines, with selectivity toward samples harboring MLL rearrangements and FLT3-ITD mutations. Combination of ART or DHA was synergistic with cytarabine. Single-dose ART (120 mg/kg) produced human equivalent exposures, but multiple dose daily administration required for in vivo efficacy was not tolerated. Combination treatment produced initial regression, but did not prolong survival in vivo.The pharmacology of artemisinins is problematic and should be considered in designing AML treatment strategies with currently available agents. Artemisinins with improved pharmacokinetic properties may offer therapeutic benefit in combination with conventional therapeutic strategies in AML.

SUBMITTER: Drenberg CD 

PROVIDER: S-EPMC4918815 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Evaluation of artemisinins for the treatment of acute myeloid leukemia.

Drenberg Christina D CD   Buaboonnam Jassada J   Orwick Shelley J SJ   Hu Shuiying S   Li Lie L   Fan Yiping Y   Shelat Anang A AA   Guy R Kiplin RK   Rubnitz Jeffrey J   Baker Sharyn D SD  

Cancer chemotherapy and pharmacology 20160428 6


<h4>Purpose</h4>Investigate antileukemic activity of artemisinins, artesunate (ART), and dihydroartemisinin (DHA), in combination with cytarabine, a key component of acute myeloid leukemia (AML) chemotherapy using in vitro and in vivo models.<h4>Methods</h4>Using ten human AML cell lines, we conducted a high-throughput screen to identify antimalarial agents with antileukemic activity. We evaluated effects of ART and DHA on cell viability, cytotoxicity, apoptosis, lysosomal integrity, and combina  ...[more]

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