國家衛生研究院 NHRI:Item 3990099045/1666
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/1666


    Title: Beyond peroxisome proliferator-activated receptor gamma signaling: the multi-facets of the antitumor effect of thiazolidinediones
    Authors: Weng, JR;Chen, CY;Pinzone, JJ;Ringel, MD;Chen, CS
    Contributors: Division of Gerontology Research
    Abstract: Certain members of the thiazolidinedione (TZD) family of the peroxisome proliferator-activated receptor gamma (PPAR gamma) agonists, such as troglitazone and ciglitazone, exhibit antitumor activities; however, the underlying mechanism remains inconclusive. Substantial evidence suggests that the antiproliferative effect of these TZD members in cancer cells is independent of PPAR gamma activation. To discern the role of PPAR gamma in the antitumor effects of TZDs, we have synthesized PPAR gamma-inactive TZD analogs which, although devoid of PPAR gamma activity, retain the ability to induce apoptosis with a potency equal to that of their parental TZDs in cancer cell lines with varying PPAR gamma expression status. Mechanistic studies from this and other laboratories have further suggested that troglitazone and ciglitazone mediate antiproliferative effects through a complexity of PPAR gamma-independent mechanisms. Evidence indicates that troglitazone and ciglitazone block BH3 domain-mediated interactions between the anti apoptotic Bcl-2 (B-cell leukemia/lymphoma 2) members Bcl-2/Bcl-xL and proapoptotic Bcl-2 members. Moreover, these TZDs facilitate the degradation of cyclin D1 and caspase-8-related FADD-like IL-1-converting enzyme (FLICE)-inhibitory protein through proteasome-mediated proteolysis, and down-regulate the gene expression of prostate-specific antigen gene expression by inhibiting androgen activation of the androgen response elements in the promoter region. More importantly, dissociation of the effects of TZDs on apoptosis from their original pharmacological activity (i.e. PPAR gamma activation) provides a molecular basis for the exploitation of these compounds to develop different types of molecularly targeted anticancer agents. These TZD-derived novel therapeutic agents, alone or in combination with other anticancer drugs, have translational relevance in fostering effective strategies for cancer treatment.
    Keywords: Oncology;Endocrinology & Metabolism
    Date: 2006-06
    Relation: Endocrine-Related Cancer. 2006 Jun;13(2):401-413.
    Link to: http://dx.doi.org/10.1677/erc.1.01182
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1351-0088&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000238315700008
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33745113772
    Appears in Collections:[Ching-Yu Chen(2006-2010)] Periodical Articles

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