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    Phase II, Multicenter, Randomized Trial of Docetaxel plus Prednisone with or Without Cediranib in Men with Chemotherapy-Naive Metastatic Castrate-Resistant Prostate Cancer

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    Author
    Heath, E.
    Heilbrun, L.
    Mannuel, H.
    Date
    2019
    Journal
    Oncologist
    Publisher
    Wiley-Blackwell
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://doi.org/10.1634/theoncologist.2019-0331
    Abstract
    Lessons Learned: The negative results are consistent with the negative results of large phase III trials in which docetaxel plus antiangiogenic agents were used in patients with metastatic castrate-resistant prostate cancer (mCRPC). The negative data underscore that, despite a sound biological rationale and supportive early-phase clinical results, adding antiangiogenic agents to docetaxel for mCRPC is a great challenge. Background: Inhibition of vascular endothelial growth factor (VEGF) signaling abrogates tumor-induced angiogenesis to constrain tumor growth, and can be exploited therapeutically by using cediranib, an oral tyrosine kinase inhibitor of VEGF receptor signaling. Our preliminary phase I trial data showed that adding cediranib to docetaxel plus prednisone (DP) was safe and feasible, with early evidence for efficacy in patients with metastatic castrate-resistant prostate cancer (mCRPC). Methods: This multicenter phase II trial assessed whether adding cediranib to DP improves efficacy of DP in patients with mCRPC. Chemotherapy-naive patients with mCRPC were randomly assigned to receive either docetaxel (75 mg/m2 intravenously every 3 weeks) with prednisone (5 mg twice daily) plus cediranib (30 mg once daily; the DP+C arm) or DP only (the DP arm). The primary endpoint was to compare 6-month progression-free survival (PFS) rate between the two arms. Secondary endpoints included 6-month overall survival (OS), objective tumor and prostate-specific antigen (PSA) response rates, biomarkers, and adverse events. Results: The 6-month PFS rate in a total of 58 patients was only numerically higher in the DP+C arm (61%) compared with the DP arm (57%). Similarly, the 6-month OS rate, objective tumor and PSA response rates, and biomarkers were not significantly different between the two arms. Increased baseline levels of interleukin 6 (IL-6), however, were significantly associated with increased risk of progression. Neutropenia was the only grade 4 toxicity (38% in the DP+C arm vs. 18% in the DP arm). Conclusion: Combining cediranib with docetaxel + prednisone failed to demonstrate superior efficacy, compared with docetaxel + prednisone, and added toxicity. Our data do not support pursuing the combination further in patients with mCRPC.
    Keyword
    cediranib
    Docetaxel
    Prednisone
    Prostatic Neoplasms, Castration-Resistant--drug therapy
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066823926&doi=10.1634%2ftheoncologist.2019-0331&partnerID=40&md5=f8cb1c1704cd4df4bec26533ac4380b9; http://hdl.handle.net/10713/10717
    ae974a485f413a2113503eed53cd6c53
    10.1634/theoncologist.2019-0331
    Scopus Count
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    UMB Open Access Articles 2019

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