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Radiosensitizing Effect of 5-Aminolevulinic Acid and Protoporphyrin IX on Carbon-ion Beam Irradiation. 2018

Tomoko Kaneko, and Masahide Tominaga, and Risa Kouzaki, and Ayaka Hanyu, and Kazuki Ueshima, and Hisatsugu Yamada, and Masaki Suga, and Tomohiro Yamashita, and Tomoaki Okimoto, and Yoshihiro Uto
SAGA Heavy Ion Medical Accelerator in Tosu, Tosu, Japan.

OBJECTIVE Carbon-ion beam is one of the most advanced radiations used for cancer treatment. However, there are tumors that are difficult to suppress with carbon-ion beam alone, thus necessitating development of drugs that can enhance its therapeutic effect. In this regard, the radiosensitizing effect of 5-aminolevulinic acid (ALA) and protoporphyrin IX (PpIX), that is a metabolic intermediate of ALA, on carbon-ion beam was investigated. METHODS Radiosensitizing activity, mitochondrial ROS and DNA double-strand break production of ALA and PpIX were evaluated by irradiation with 1.0 or 1.5-Gy carbon-ion beam to mouse mammary EMT6 tumor cells. RESULTS Combination of carbon-ion beam and ALA or PpIX showed a significant enhancement of its cytotoxic activity through a significant increase in ROS production in mitochondria. Furthermore, the combined activity of carbon-ion beam and ALA resulted in a significant increase in DNA double-strand breakage. CONCLUSIONS ALA selectively accumulates in the mitochondria and PpIX synthesized from ALA reacts with carbon-ion beam to produce ROS that exert antitumor activity.

UI MeSH Term Description Entries
D007982 Levulinic Acids Keto acids that are derivatives of 4-oxopentanoic acids (levulinic acid). Acids, Levulinic
D011524 Protoporphyrins Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached to the pyrrole rings. Protoporphyrin IX occurs in hemoglobin, myoglobin, and most of the cytochromes.
D011838 Radiation-Sensitizing Agents Drugs used to potentiate the effectiveness of radiation therapy in destroying unwanted cells. Radiation Sensitizer,Radiosensitizing Agent,Radiosensitizing Agents,Agents, Radiation-Sensitizing,Radiation Sensitizers,Radiation Sensitizing Agents,Radiation-Sensitizing Drugs,Radiation-Sensitizing Effect,Radiation-Sensitizing Effects,Radiosensitizing Drugs,Radiosensitizing Effect,Radiosensitizing Effects,Agent, Radiosensitizing,Agents, Radiation Sensitizing,Agents, Radiosensitizing,Drugs, Radiation-Sensitizing,Drugs, Radiosensitizing,Effect, Radiation-Sensitizing,Effect, Radiosensitizing,Effects, Radiation-Sensitizing,Effects, Radiosensitizing,Radiation Sensitizing Drugs,Radiation Sensitizing Effect,Radiation Sensitizing Effects,Sensitizer, Radiation,Sensitizers, Radiation,Sensitizing Agents, Radiation
D000622 Aminolevulinic Acid A compound produced from succinyl-CoA and GLYCINE as an intermediate in heme synthesis. It is used as a PHOTOCHEMOTHERAPY for actinic KERATOSIS. 5-Amino Levulinic Acid,5-Aminolaevulinate,5-Aminolevulinate,Aminolevulinic Acid Hydrochloride,Delta-Aminolevulinic Acid,Levulan,5 Amino Levulinic Acid,5 Aminolaevulinate,5 Aminolevulinate,Acid Hydrochloride, Aminolevulinic,Acid, 5-Amino Levulinic,Acid, Aminolevulinic,Acid, Delta-Aminolevulinic,Delta Aminolevulinic Acid,Hydrochloride, Aminolevulinic Acid,Levulinic Acid, 5-Amino
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D017382 Reactive Oxygen Species Molecules or ions formed by the incomplete one-electron reduction of oxygen. These reactive oxygen intermediates include SINGLET OXYGEN; SUPEROXIDES; PEROXIDES; HYDROXYL RADICAL; and HYPOCHLOROUS ACID. They contribute to the microbicidal activity of PHAGOCYTES, regulation of SIGNAL TRANSDUCTION and GENE EXPRESSION, and the oxidative damage to NUCLEIC ACIDS; PROTEINS; and LIPIDS. Active Oxygen Species,Oxygen Radical,Oxygen Radicals,Pro-Oxidant,Reactive Oxygen Intermediates,Active Oxygen,Oxygen Species, Reactive,Pro-Oxidants,Oxygen, Active,Pro Oxidant,Pro Oxidants,Radical, Oxygen
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D053903 DNA Breaks, Double-Stranded Interruptions in the sugar-phosphate backbone of DNA, across both strands adjacently. Double-Stranded DNA Breaks,Double-Strand DNA Breaks,Double-Stranded DNA Break,Break, Double-Strand DNA,Break, Double-Stranded DNA,Breaks, Double-Strand DNA,Breaks, Double-Stranded DNA,DNA Break, Double-Strand,DNA Break, Double-Stranded,DNA Breaks, Double Stranded,DNA Breaks, Double-Strand,Double Strand DNA Breaks,Double Stranded DNA Break,Double Stranded DNA Breaks,Double-Strand DNA Break
D063193 Heavy Ion Radiotherapy The use of a heavy ion particle beam for radiotherapy, such as the HEAVY IONS of CARBON. Carbon Ion Radiation Therapy,Carbon Ion Radiotherapy,Carbon Ion Therapy,Heavy Ion Radiation Therapy,Heavy Ion Therapy,Carbon Ion Therapies,Heavy Ion Radiotherapies,Heavy Ion Therapies,Radiotherapies, Heavy Ion,Radiotherapy, Carbon Ion,Radiotherapy, Heavy Ion,Therapies, Carbon Ion,Therapies, Heavy Ion,Therapy, Carbon Ion,Therapy, Heavy Ion

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