Suppression of intracellular Cu-Zn SOD results in enhanced motility and metastasis of Meth A sarcoma cells.

Abstract:

:We have previously described an inverse relationship between Cu-Zn superoxide dismutase (SOD) activity and invasiveness of a clone of human tongue cancer cells. In these cells, suppression of Cu-Zn SOD activity by transfection with anti-sense cDNA enhanced motility in vitro. The present studies were undertaken to determine whether the inverse relationship between intracellular Cu-Zn SOD activity and motility is a general property of other tumor cells and whether this enzyme indeed defines in vivo metastatic potential. Murine Meth A sarcoma-derived ML-01 cells, which have low metastatic activity, were transfected with anti-sense Cu-Zn SOD cDNA. Two clones with very different SOD activities--ML-AS2, with the most suppressed, and ML-AS5, with the least suppressed activity-were analyzed for their motility and metastatic capability. Compared to the mocktransfectant ML-neo, the metastatic potential and motility of the ML-AS2 and ML-AS5 were increased 4.5- and 2.1-fold, respectively. Superoxide treatment enhanced the motility of the AS clones but not that of the ML-neo cells. Our results clearly show that there is an inverse relationship between the intracellular level of Cu-Zn SOD, cell motility and in vivo metastatic potential.

journal_name

Int J Cancer

authors

Tanaka M,Kogawa K,Nishihori Y,Kuribayashi K,Nakamura K,Muramatsu H,Koike K,Sakamaki S,Niitsu Y

doi

10.1002/(sici)1097-0215(19971009)73:2<187::aid-ijc

subject

Has Abstract

pub_date

1997-10-09 00:00:00

pages

187-92

issue

2

eissn

0020-7136

issn

1097-0215

pii

10.1002/(SICI)1097-0215(19971009)73:2<187::AID-IJC

journal_volume

73

pub_type

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