國家衛生研究院 NHRI:Item 3990099045/7143
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/7143


    Title: Quantum dots induced monocyte chemotactic protein-1 expression via MyD88-dependent Toll-like receptor signaling pathways in macrophages
    Authors: Ho, CC;Luo, YH;Chuang, TH;Yang, CS;Ling, YC;Lin, P
    Contributors: Division of Environmental Health and Occupational Medicine;Immunology Research Center;Center for Nanomedicine Research
    Abstract: Quantum dots (QDs) are nano-sized semiconductors. Previously, intratracheal instillation of QD705s induces persistent inflammation in mouse lungs. In our present study, QD705-COOH and QD705-PEG activated NF-κB and increased monocyte chemotactic protein-1 (MCP-1) expression in macrophages RAW264.7 via MyD88 dependent Toll-like receptor (TLR) signaling pathways. MyD88 is an adapter protein for most TLRs to activate NF-κB. Silencing expression of MyD88 or p65 with siRNA or co-treatment with a NF-κB inhibitor tremendously abolished QD705s-induced NF-κB activity and MCP-1 expression. The involved TLRs might locate either on the cell surface or inside of cells. Co-treatment with a TLR4 inhibitor completely prevented MCP-1 induction by QD705-PEG. Nevertheless, QD705-COOH readily entered cells, and co-treatment with either inhibitors of endocytosis or intracellular TLRs prevented MCP-1 induction. These findings indicate that, depending on their surface modification, OD705s activate MyD88 dependent-TLRs at the surface or inside of the cells, which is an important mechanism for nanoparticles-induced inflammatory responses. But other MyD88-independent pathways may also involve in these responses.
    Date: 2013-06
    Relation: Toxicology. 2013 Jun;308:1-9.
    Link to: http://dx.doi.org/10.1016/j.tox.2013.03.003
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0300-483X&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000321089500001
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84876708985
    Appears in Collections:[Pinpin Lin] Periodical Articles
    [Tsung-Hsien Chuang] Periodical Articles
    [Chung-Shi Yang] Periodical Articles

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