CuZnSOD and MnSOD inhibit metabolic stress-induced necrosis and multicellular tumour spheroid growth

  • Authors:
    • Su Yeon Lee
    • Hyun Min Jeon
    • Cho Hee Kim
    • Eui Kyong Jeong
    • Min Kyung Ju
    • Song Yi Park
    • Seung Youn Jung
    • Yung Jin Kim
    • Sung-Chul Lim
    • Song Iy Han
    • Ho Sung Kang
  • View Affiliations

  • Published online on: July 1, 2010     https://doi.org/10.3892/ijo_00000667
  • Pages: 195-202
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Abstract

CuZnSOD and MnSOD have been shown to exert tumour suppressive activities; however, their exact molecular mechanism is still unclear. We investigated the molecular mechanism underlying the tumour suppressive activities of CuZnSOD and MnSOD using multicellular tumour spheroid (MTS), an in vitro tumour model. Overexpression of CuZnSOD and MnSOD significantly suppressed the growth of A549 and MCF-7 MTS, supporting a critical role(s) of reactive oxygen species (ROS) in tumour growth. In solid tumours, ROS is produced by metabolic stress due to insufficient oxygen and glucose supply and induces necrosis that is known to promote tumour progression by releasing the proinflammatory cytokine HMGB1. We observed that CuZnSOD and MnSOD overexpression prevents metabolic stress-induced necrosis and HMGB1 release by inhibiting mitochondrial ROS and intracellular O2− production in response to glucose depletion in two dimensional cell culture. CuZnSOD and MnSOD overexpression also significantly repressed the occurrence of necrosis that was observed during MTS culture. In human tumour tissues including lung pulmonary adenocarcinoma, CuZnSOD and MnSOD expression was detected in the para-necrotic region that was identified by the expression of a hypoxic marker carbonic anhydrase (CA) IX. These results suggest that CuZnSOD and MnSOD may suppress tumour growth through inhibiting metabolic stress-induced necrosis and HMGB1 release via inhibiting metabolic stress-induced mitochondrial ROS production.

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July 2010
Volume 37 Issue 1

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

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Spandidos Publications style
Lee SY, Jeon HM, Kim CH, Jeong EK, Ju MK, Park SY, Jung SY, Kim YJ, Lim S, Han SI, Han SI, et al: CuZnSOD and MnSOD inhibit metabolic stress-induced necrosis and multicellular tumour spheroid growth. Int J Oncol 37: 195-202, 2010
APA
Lee, S.Y., Jeon, H.M., Kim, C.H., Jeong, E.K., Ju, M.K., Park, S.Y. ... Kang, H.S. (2010). CuZnSOD and MnSOD inhibit metabolic stress-induced necrosis and multicellular tumour spheroid growth. International Journal of Oncology, 37, 195-202. https://doi.org/10.3892/ijo_00000667
MLA
Lee, S. Y., Jeon, H. M., Kim, C. H., Jeong, E. K., Ju, M. K., Park, S. Y., Jung, S. Y., Kim, Y. J., Lim, S., Han, S. I., Kang, H. S."CuZnSOD and MnSOD inhibit metabolic stress-induced necrosis and multicellular tumour spheroid growth". International Journal of Oncology 37.1 (2010): 195-202.
Chicago
Lee, S. Y., Jeon, H. M., Kim, C. H., Jeong, E. K., Ju, M. K., Park, S. Y., Jung, S. Y., Kim, Y. J., Lim, S., Han, S. I., Kang, H. S."CuZnSOD and MnSOD inhibit metabolic stress-induced necrosis and multicellular tumour spheroid growth". International Journal of Oncology 37, no. 1 (2010): 195-202. https://doi.org/10.3892/ijo_00000667