Mar. Drugs 2013, 11(2), 332-349; doi:10.3390/md11020332
Article

Iodinin (1,6-Dihydroxyphenazine 5,10-Dioxide) from Streptosporangium sp. Induces Apoptosis Selectively in Myeloid Leukemia Cell Lines and Patient Cells

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Received: 25 October 2012; in revised form: 21 December 2012 / Accepted: 4 January 2013 / Published: 30 January 2013
(This article belongs to the Special Issue Marine Antibiotics)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Despite recent improvement in therapy, acute myeloid leukemia (AML) is still associated with high lethality. In the presented study, we analyzed the bioactive compound iodinin (1,6-dihydroxyphenazine 5,10-dioxide) from a marine actinomycetes bacterium for the ability to induce cell death in a range of cell types. Iodinin showed selective toxicity to AML and acute promyelocytic (APL) leukemia cells, with EC50 values for cell death up to 40 times lower for leukemia cells when compared with normal cells. Iodinin also successfully induced cell death in patient-derived leukemia cells or cell lines with features associated with poor prognostic such as FLT3 internal tandem duplications or mutated/deficient p53. The cell death had typical apoptotic morphology, and activation of apoptotic signaling proteins like caspase-3. Molecular modeling suggested that iodinin could intercalate between bases in the DNA in a way similar to the anti-cancer drug daunorubicin (DNR), causing DNA-strand breaks. Iodinin induced apoptosis in several therapy-resistant AML-patient blasts, but to a low degree in peripheral blood leukocytes, and in contrast to DNR, not in rat cardiomyoblasts. The low activity towards normal cell types that are usually affected by anti-leukemia therapy suggests that iodinin and related compounds represent promising structures in the development of anti-cancer therapy.
Keywords: acute myeloid leukemia; natural products; daunorubicin; patient samples
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MDPI and ACS Style

Myhren, L.E.; Nygaard, G.; Gausdal, G.; Sletta, H.; Teigen, K.; Degnes, K.F.; Zahlsen, K.; Brunsvik, A.; Bruserud, Ø.; Døskeland, S.O.; Selheim, F.; Herfindal, L. Iodinin (1,6-Dihydroxyphenazine 5,10-Dioxide) from Streptosporangium sp. Induces Apoptosis Selectively in Myeloid Leukemia Cell Lines and Patient Cells. Mar. Drugs 2013, 11, 332-349.

AMA Style

Myhren LE, Nygaard G, Gausdal G, Sletta H, Teigen K, Degnes KF, Zahlsen K, Brunsvik A, Bruserud Ø, Døskeland SO, Selheim F, Herfindal L. Iodinin (1,6-Dihydroxyphenazine 5,10-Dioxide) from Streptosporangium sp. Induces Apoptosis Selectively in Myeloid Leukemia Cell Lines and Patient Cells. Marine Drugs. 2013; 11(2):332-349.

Chicago/Turabian Style

Myhren, Lene E.; Nygaard, Gyrid; Gausdal, Gro; Sletta, Håvard; Teigen, Knut; Degnes, Kristin F.; Zahlsen, Kolbjørn; Brunsvik, Anders; Bruserud, Øystein; Døskeland, Stein O.; Selheim, Frode; Herfindal, Lars. 2013. "Iodinin (1,6-Dihydroxyphenazine 5,10-Dioxide) from Streptosporangium sp. Induces Apoptosis Selectively in Myeloid Leukemia Cell Lines and Patient Cells." Mar. Drugs 11, no. 2: 332-349.


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