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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/10671


    Title: Docosahexaenoic acid increases the expression of oxidative stress-induced growth inhibitor 1 through the PI3K/Akt/Nrf2 signaling pathway in breast cancer cells
    Authors: Tsai, CH;Shen, YC;Chen, HW;Liu, KL;Chang, JW;Chen, PY;Lin, CY;Yao, HT;Li, CC
    Contributors: Institute of Molecular and Genomic Medicine
    Abstract: Oxidative stress-induced growth inhibitor 1 (OSGIN1), a tumor suppressor, inhibits cell proliferation and induces cell death. N-6 and n-3 PUFAs protect against breast cancer, but the molecular mechanisms of this effect are not clear. We investigated the effect of n-6 and n-3 PUFAs on OSGIN1 expression and whether OSGIN1 is involved in PUFA-induced apoptosis in breast cancer cells. We used 100 muM of n-6 PUFAs including arachidonic acid, linoleic acid, and gamma-linolenic acid and n-3 PUFAs including alpha-linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid (DHA). Only DHA significantly induced OSGIN1 protein and mRNA expression. DHA triggered reactive oxygen species (ROS) generation and nuclear translocation of Nrf2. LY294002, a PI3K inhibitor, suppressed DHA-induced OSGIN1 protein expression and nuclear accumulation of Nrf2. Nrf2 knockdown attenuated DHA-induced OSGIN1 expression. N-Acetyl-l-cysteine, a ROS scavenger, abrogated the DHA-induced increases in Akt phosphorylation, Nrf2 nuclear accumulation, and OSGIN1 expression. DHA induced the Bax/Bcl-2 ratio, mitochondrial accumulation of OSGIN1 and p53, and cytochrome c release; knockdown of OSGIN1 diminished these effects. In conclusion, induction of OSGIN1 by DHA is at least partially associated with increased ROS production, which activates PI3K/Akt/Nrf2 signaling. Induction of OSGIN1 may be involved in DHA-induced apoptosis in breast cancer cells.
    Date: 2017-08-12
    Relation: Food and Chemical Toxicology. 2017 Aug 12;108(Pt A):276-288.
    Link to: http://dx.doi.org/10.1016/j.fct.2017.08.010
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0278-6915&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000412035500028
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85027502515
    Appears in Collections:[其他] 期刊論文

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