期刊
JOURNAL OF NUTRITIONAL BIOCHEMISTRY
卷 23, 期 5, 页码 452-457出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jnutbio.2011.01.010
关键词
Docosahexaenoic acid (DHA); Granzyme B (GrB); Invasion; Extracellular matrix (ECM); Bladder cancer; Pancreatic cancer
资金
- Ministero dell'Universita e della Ricerca Scientifica e Tecnologica
- Tuscia University, Viterbo, Italy
Fish oil-derived n-3 polyunsaturated fatty acids (n-3 PUFAs) inhibit invasion of some tumor cell types in vitro and in vivo. The mechanisms underlying this activity are unclear. Here, we examined the capability of n-3 PUFA-docosahexaenoic acid (22:6n-3; DHA) to affect the invasiveness of human RT112 urinary bladder and PT45 pancreatic carcinoma cell lines in vitro and the mechanism underlying this activity; n-6 PUFA-arachidonic acid (20:4n-6; AA) served as control. We showed that, in contrast to AA, 25, 50 and 100 mu M DHA significantly inhibited in a dose-dependent manner the invasion through Matrigel of both RT112 and FT45 cells. Then, we analyzed whether the serine proteinase granzyme B (GrB), originally known as cytotoxic molecule of lymphocytes and recently also characterized for its extracellular functions such as invasion promotion of bladder cancer cells, might be involved in the invasion inhibitory activity exerted by DHA. We demonstrated that, accordingly to RT112 bladder cancer cells, PT45 cells expressed GrB and GrB promoted their invasion, since stealth RNA interference-mediated down-regulation of GrB dramatically suppressed FT45 cell invasion. Notably, we also showed that, in contrast to AA, 25, 50 and 100 mu M DHA induced a dose-dependent down-modulation of GrB expression in both RT112 and FT45 cells. In conclusion, DHA can reduce the invasive phenotype of bladder and pancreatic carcinoma cells, and we provide the first evidence for a possible causative role of GrB in DHA-induced inhibition of cancer cell invasion. The potential use of fish oil as adjuvant antibladder and antipancreatic cancer agent may be suggested. (C) 2012 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据