Abstract |
Lysosomal membrane permeabilization and subsequent cell death may prove useful in cancer treatment, provided that cancer cell lysosomes can be specifically targeted. Here, we identify acid sphingomyelinase (ASM) inhibition as a selective means to destabilize cancer cell lysosomes. Lysosome-destabilizing experimental anticancer agent siramesine inhibits ASM by interfering with the binding of ASM to its essential lysosomal cofactor, bis(monoacylglycero)phosphate. Like siramesine, several clinically relevant ASM inhibitors trigger cancer-specific lysosomal cell death, reduce tumor growth in vivo, and revert multidrug resistance. Their cancer selectivity is associated with transformation-associated reduction in ASM expression and subsequent failure to maintain sphingomyelin hydrolysis during drug exposure. Taken together, these data identify ASM as an attractive target for cancer therapy.
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Authors | Nikolaj H T Petersen, Ole D Olsen, Line Groth-Pedersen, Anne-Marie Ellegaard, Mesut Bilgin, Susanne Redmer, Marie S Ostenfeld, Danielle Ulanet, Tobias H Dovmark, Andreas Lønborg, Signe D Vindeløv, Douglas Hanahan, Christoph Arenz, Christer S Ejsing, Thomas Kirkegaard, Mikkel Rohde, Jesper Nylandsted, Marja Jäättelä |
Journal | Cancer cell
(Cancer Cell)
Vol. 24
Issue 3
Pg. 379-93
(Sep 09 2013)
ISSN: 1878-3686 [Electronic] United States |
PMID | 24029234
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2013 Elsevier Inc. All rights reserved. |
Chemical References |
- Antineoplastic Agents
- Enzyme Inhibitors
- HSP70 Heat-Shock Proteins
- Indoles
- Lu 28-179
- Sphingolipids
- Spiro Compounds
- Sphingomyelin Phosphodiesterase
- Tocopherols
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Topics |
- Animals
- Antineoplastic Agents
(pharmacology, toxicity)
- Cell Death
(drug effects)
- Cell Line, Tumor
- Cell Transformation, Neoplastic
(metabolism)
- Drug Resistance, Neoplasm
- Enzyme Activation
(drug effects)
- Enzyme Inhibitors
(pharmacology, toxicity)
- Female
- HSP70 Heat-Shock Proteins
(genetics, metabolism)
- Humans
- Indoles
(pharmacology, toxicity)
- Lysosomes
(metabolism)
- Mice
- Mice, Transgenic
- Phenotype
- Sphingolipids
(metabolism)
- Sphingomyelin Phosphodiesterase
(antagonists & inhibitors)
- Spiro Compounds
(pharmacology, toxicity)
- Tocopherols
(pharmacology)
- Xenograft Model Antitumor Assays
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