Cited by 40Drug Transport and Resistance MechanismsCancer therapeutics and mechanismsNanoparticle-Based Drug Delivery

Membrane transport and antitumor activity of pirarubicin, and comparison with those of doxorubicin

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Sugiyama, Tomomi, Sadzuka, Yasuyuki, Nagasawa, Kazuki, Ohnishi, Noriaki, Yokoyama, Teruyoshi, Sonobe, Takashi·1999·Japanese Journal of Cancer Research

Abstract

We have compared the membrane transport and antitumor activity of pirarubicin with those of doxorubicin in M5076 ovarian sarcoma, which exhibits low sensitivity to doxorubicin. Pirarubicin was rapidly taken up by M5076 cells and the intracellular concentration of pirarubicin reached more than 2.5‐fold that of doxorubicin. In terms of the 50% cell growth‐inhibitory concentration in vitro, pirarubicin was more effective than doxorubicin. Thus, the intracellular concentration influenced the cytotoxicity of these anthracycline agents. On comparison of the nuclear uptake of pirarubicin and doxorubicin, the nucleus/cell ratio of pirarubicin was found to be about 40%, whereas that of doxorubicin reached more than 80%. As the intranuclear concentration of pirarubicin is dependent on nuclear transport, the increases in not only cell membrane transport, but also nuclear membrane transport contributed to the enhancement of the efficacy of pirarubicin. In M5076 solid tumor‐bearing mice, pirarubicin reduced the tumor weight to 60% of the control level, although doxorubicin had no effect. These results were supported by the intracellular uptake of pirarubicin. Moreover, theanine, which inhibited the pirarubicin efflux from M5076 cells, increased by 1.3‐fold the pirarubicin concentration in the tumor and enhanced the therapeutic efficacy of pirarubicin 1.7‐fold. In conclusion, our results suggest that an increase in the concentration of an anthracycline derivative in tumor cells due to alteration of cell membrane transport results in enhancement of the antitumor activity.

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Crossref · 10.1111/j.1349-7006.1999.tb00814.x

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  • Theanine inhibits efflux of chemotherapeutic agents such as doxorubicin, idarubicin, cisplatin, and irinotecan, causing them to accumulate in tumor cells and protecting normal cells through antioxidant property and maintenance of cellular GSH.

    “The efflux of chemotherapeutic agents (e.g.doxorubicin, idarubicin, cisplatin, irinotecan) are inhibited by theanine, which causes them to accumulate in tumor cells and to protect normal cells from damage by these drugs through its antioxidant property and maintaining cellular GSH level [22,[27][28][29] .”
  • L-theanine competitively inhibits glutamate transport into infected tumor cells and can decrease intracellular glutathione levels.

    “L-theanine, as chemotherapeutic agent, competitively inhibits glutamate transport into the infected tumor cells, can also decrease intracellular glutathione (GSH) levels.”
  • Theanine inhibits biosynthesis of the glutamate transport protein and intracellular glutathione, resulting in less glutathione doxorubicin conjugate of the MRP5/GS-X pump and less intercellular transport of doxorubicin, which is beneficial for anti-tumor drugs.

    “First, Theanine inhibits biosynthesis of the glutamate transport protein and intracellular glutathione, resulting in less glutathione doxorubicin conjugate (GS-DOX) of the multidrug resistance-associated protein-5/GS-X (MRP5/GS-X) pump, and less intercellular transport of doxorubicin (DOX), which is beneficial in effect of anti-tumor drugs [28,50] .”

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Authors
Sugiyama, T., Sadzuka, Y., Nagasawa, K., Ohnishi, N., Yokoyama, T., & Sonobe, T.
Affiliations
  • Shizuoka University (JP)
  • Kyoto Pharmaceutical University (JP)
Corresponding author
Sadzuka, Yasuyuki
Venue
Japanese Journal of Cancer Research
Publisher
Wiley
Published
1999-07
Volume
90
Issue
7
Pages
775-780
ISSN
0910-5050 (ISSN-L)
OpenAlex
W1966061343
Cited by
40
References
19
Citations by year
2024: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 1 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 1 · 2013: 1 · 2012: 1
FWCI
0.28
Type
journal article
Language
en
Open access
Locations
  • Japanese Journal of Cancer Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer therapeutics and mechanisms
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
Keywords
pirarubicin, doxorubicin, anthracyclines, membrane transport, nuclear transport, intracellular drug accumulation, anticancer activity, drug efflux inhibition, theanine, tumor-bearing mice, drug resistance
MeSH terms
Animals, Antibiotics, Antineoplastic, Antineoplastic Combined Chemotherapy Protocols, Biological Transport, Cell Division, Cell Membrane, Cell Nucleus, Doxorubicin, Drug Interactions, Female, Glutamates, Male, Neoplasm Transplantation, Ovarian Neoplasms, Sarcoma, Experimental, Tea, Tumor Cells, Cultured, Mice

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