Effect of low temperature on the regulation of cell volume after hypotonic shock in gastric cancer cells

  • Authors:
    • Atsushi Shiozaki
    • Yuzo Yamazato
    • Toshiyuki Kosuga
    • Michihiro Kudou
    • Katsutoshi Shoda
    • Tomohiro Arita
    • Hirotaka Konishi
    • Shuhei Komatsu
    • Takeshi Kubota
    • Hitoshi Fujiwara
    • Kazuma Okamoto
    • Yoshinori Marunaka
    • Eigo Otsuji
  • View Affiliations

  • Published online on: August 2, 2019     https://doi.org/10.3892/ijo.2019.4853
  • Pages: 905-914
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Abstract

Although peritoneal lavage with distilled water performed after surgery prevents peritoneal seeding, cancer cells may avoid rupture under mild hypotonicity through regulatory volume decrease (RVD), which is the homeostatic regulation of ion and water transport. The aim of the present study was to investigate the effect of low temperature on cell volume and cell death under hypoosmolal conditions and determine the underlying molecular mechanisms in gastric cancer (GC). Three human GC cell lines (NUGC4, KATO‑III and MKN45) were exposed to hypotonic solutions, and the effects of low temperature on cell volume and viability were examined. Low temperature‑induced changes in membrane transporters were evaluated, and knockdown and overexpression experiments were conducted to determine their effects on cell volume during hypotonic stimulation. Low temperature (24˚C) during hypotonic stimulation inhibited RVD and enhanced the cytocidal effects on GC cells. The expression of leucine‑rich repeat containing protein A (LRRC8A), a component of a Cl‑ channel, was decreased, and aquaporin 5 (AQP5) expression was increased at low temperatures. LRRC8A knockdown markedly slowed the decrease in cell volume following cell swelling by hypotonic shock. AQP5 overexpression enhanced initial cell swelling after hypotonic shock and increased the final cell volume. These results suggest that a hypotonic solution at low temperature increased initial water influx via activation of AQP5 and decreased Cl‑ efflux via inhibition of LRRC8A. Therefore, low temperature enhanced the hypotonicity‑induced cytocidal effects on GC cells, and these results may contribute to the development of a novel lavage method effective in reducing peritoneal recurrence in GC.

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October 2019
Volume 55 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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APA
Shiozaki, A., Yamazato, Y., Kosuga, T., Kudou, M., Shoda, K., Arita, T. ... Otsuji, E. (2019). Effect of low temperature on the regulation of cell volume after hypotonic shock in gastric cancer cells. International Journal of Oncology, 55, 905-914. https://doi.org/10.3892/ijo.2019.4853
MLA
Shiozaki, A., Yamazato, Y., Kosuga, T., Kudou, M., Shoda, K., Arita, T., Konishi, H., Komatsu, S., Kubota, T., Fujiwara, H., Okamoto, K., Marunaka, Y., Otsuji, E."Effect of low temperature on the regulation of cell volume after hypotonic shock in gastric cancer cells". International Journal of Oncology 55.4 (2019): 905-914.
Chicago
Shiozaki, A., Yamazato, Y., Kosuga, T., Kudou, M., Shoda, K., Arita, T., Konishi, H., Komatsu, S., Kubota, T., Fujiwara, H., Okamoto, K., Marunaka, Y., Otsuji, E."Effect of low temperature on the regulation of cell volume after hypotonic shock in gastric cancer cells". International Journal of Oncology 55, no. 4 (2019): 905-914. https://doi.org/10.3892/ijo.2019.4853