Reactive oxygen species induced by indomethacin enhance accumulation of heme ‍carrier protein 1 and hematoporphyrin accumulation in vitro and in vivo in a brain tumor model

Photodynamic therapy (PDT) is useful for various cancers such as high-grade glioma and cancers of other organs. However, the mechanism of tumor-specific accumulation of porphyrin is not clear. The authors previously reported that heme carrier protein 1 (HCP1) contributes to the transport of porphyri...

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Published in:Journal of Clinical Biochemistry and Nutrition 2024, Vol.74(3), pp.207-212
Main Authors: Kohzuki, Hidehiro, Ito, Hiromu, Kurokawa, Hiromi, Matsui, Hirofumi, Yamamoto, Tetsuya, Ishikawa, Eiichi
Format: Article
Language:English
Subjects:
Accumulation
Animal models
Anti-inflammatory agents
Bioaccumulation
Brain
Brain cancer
Brain tumors
Cancer
Electron transfer
Glioma
Glioma cells
Heme
high-grade glioma
Indomethacin
non-steroidal anti-inflammatory drug
Nonsteroidal anti-inflammatory drugs
Original
Oxygen
Photodynamic therapy
Porphyrins
Protein transport
Proteins
Reactive oxygen species
Tumors
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Summary:Photodynamic therapy (PDT) is useful for various cancers such as high-grade glioma and cancers of other organs. However, the mechanism of tumor-specific accumulation of porphyrin is not clear. The authors previously reported that heme carrier protein 1 (HCP1) contributes to the transport of porphyrins; specifically, we ‍showed that the production of cancer-specific reactive oxygen ‍species from mitochondria (mitROS) leads in turn to enhanced ‍HCP1 expression. Indomethacin (IND), a non-steroidal anti-inflammatory drug, increases ROS production by affecting mitochondrial electron transfer system. In the present work, the authors investigated the effect of pretreatment with IND on cancer-specific porphyrin accumulation, using both a glioma cell line and a rat brain tumor model. This work demonstrated that exposure of a rat glioma cell to IND results in increased generation of cancer-specific mitROS and accumulation of HCP1 expression and porphyrin concentration. Additionally, systemic dosing of a brain tumor animal model with IND resulted in elevated cellular accumulation of porphyrin in tumor cell. This is ‍an effect not seen with normal brain tissue. Thus, the administration of IND increases intracellular porphyrin concen­trations in tumor cell without exerting harmful effects on normal brain tissue, and increased porphyrin concentration in tumor cell may lead to improved PDT effect.
ISSN:0912-0009
1880-5086
DOI:10.3164/jcbn.23-20