Abstract
Destruction of cells by irradiation-induced radical formation is one of the most frequent interventions in cancer therapy. An alternative to irradiation-induced radical formation is in principle drug-induced formation of radicals, and the formation of toxic metabolites by enzyme catalyzed reactions. Thus, combination therapy targeting polyamine metabolism could represent a promising strategy to fight hyper-proliferative disease. The aim of this work is to discuss and evaluate whether the presence of a DNA damage provoked by enzymatic ROS overproduction may act as an additive or adaptive response upon radiation and combination of hyperthermia with lysosomotropic compounds may improve the cytocidal effect of polyamines oxidation metabolites. Low level of X-irradiations delivers challenging dose of damage and an additive or adaptive response with the chronic damage induced by spermine oxidase overexpression depending on the deficiency of the DNA repair mechanisms. Since reactive oxygen species lead to membrane destabilization and cell death, we discuss the effects of BSAO and spermine association in multidrug resistant cells that resulted more sensitive to spermine metabolites than their wild-type counterparts, due to an increased mitochondrial activity. Since mammal spermine oxidase is differentially activated in a tissue specific manner, and cancer cells can differ in term of DNA repair capability, it could be of interest to open a scientific debate to use combinatory treatments to alter spermine metabolism and deliver differential response.
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Abbreviations
- ADR:
-
Adriamicyne resistant cells
- AO:
-
Amine oxidase
- APAO:
-
Acetyl-polyamine oxidase
- BER:
-
Base-excision-repair
- BSAO:
-
Bovine serum amine oxidase
- DSB:
-
Double strand break
- DX:
-
Doxorubicin resistant
- FAD:
-
Flavin-adenin-dinucleotide
- H2O2 :
-
Hydrogen peroxide
- IU:
-
International units
- LNT:
-
Linear no-threshold
- METC:
-
Mitochondrial electron transport chain
- MDL 72527:
-
N1,N4-bis(2,3-butadienyl)-1,4-butanediaminedihydrochloride
- MDR:
-
Multidrug resistant
- NER:
-
Nucleotide-excision-repair
- PA:
-
Polyamine
- P-gp:
-
P-glycoprotein
- ROS:
-
Reactive oxygen species
- SMOX:
-
Spermine oxidase
- SPD:
-
Spermidine
- SPM:
-
Spermine
- SSB:
-
Single strand break
- TC-NER:
-
Transcription coupled-NER
- TEM:
-
Transmission electron microscopy
- JC-1:
-
5,5,6,6-Tetrachloro-1,1,3,3-tetraethylbenzimidazolcarbocyanine iodide
- WT:
-
Wild-type
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Acknowledgments
This work was funded in part by the Italian MIUR (Ministero dell’Istruzione, dell’Università e della Ricerca), by MIUR-PRIN (Cofin), by Istituto Superiore di Sanità “Project Italy-USA” and by Istituto Pasteur Fondazione Cenci Bolognetti (EA). Thanks are due to “Fondazione Sovena” for the scholarship given to Dr. Giampiero Tempera for supporting his postdoc.
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Amendola, R., Cervelli, M., Tempera, G. et al. Spermine metabolism and radiation-derived reactive oxygen species for future therapeutic implications in cancer: an additive or adaptive response. Amino Acids 46, 487–498 (2014). https://doi.org/10.1007/s00726-013-1579-9
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DOI: https://doi.org/10.1007/s00726-013-1579-9