Aldehyde dehydrogenase 1A1 and gelsolin identified as novel invasion-modulating factors in conditioned medium of pancreatic cancer cells

被引:18
作者
Walsh, Naomi [1 ]
Dowling, Paul [1 ]
O'Donovan, Norma [1 ]
Henry, Michael [1 ]
Meleady, Paula [1 ]
Clynes, Martin [1 ]
机构
[1] Dublin City Univ, Natl Inst Cellular Biotechnol, Dublin 9, Ireland
关键词
ALDH1A1; GSN; Pancreatic cancer; Invasion; Conditioned media; 2D DIGE MALDI-TOF MS;
D O I
10.1016/j.jprot.2008.09.002
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Conditioned medium (CM) from clonal sub-populations of the pancreatic cancer cell line, MiaPaCa-2 with differing invasive abilities, were examined for their effect on in vitro invasion. Conditioned medium from Clone #3 (CM#3) strongly promoted invasion, while CM from Clone #8 (CM#8) inhibited invasion in vitro. 2D DIGE followed by MALDI-TOF MS analysis of CM#3 and CM#8 identified 41 proteins which were differentially regulated; 27 proteins were down-regulated and 14 proteins up-regulated in the invasion-promoting CM#3 when compared to CM#8. Western blotting analysis confirmed the down-regulated expression of gelsolin and the up-regulation of aldehyde dehydrogenase 1A1 in CM#3. Down-regulation of aldehyde dehydrogenase 1A1 in Clone #3 CM and gelsolin levels in Clone #8 CM by siRNA transfection revealed an important involvement of these proteins in promoting and inhibiting invasion in these pancreatic cancer cell lines. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:561 / 571
页数:11
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