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Article

Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer

  • Authors:
    • Marja-Riitta Väisänen
    • Arja Jukkola-Vuorinen
    • Katri S. Vuopala
    • Katri S. Selander
    • Markku H. Vaarala
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, Oulu University Hospital, 90029 OYS, Finland, Department of Oncology, Oulu University Hospital, 90029 OYS, Finland, Department of Pathology, Lapland Central Hospital, 96101 Rovaniemi, Finland, Department of Medicine, Division of Hematology-Oncology, University of Alabama at Birmingham, Birmingham, AL 35294‑2182, USA, Department of Surgery, Oulu University Hospital, 90029 OYS, Finland
  • Pages: 1659-1663
    |
    Published online on: February 20, 2013
       https://doi.org/10.3892/ol.2013.1204
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Abstract

Toll-like receptor-9 (TLR9) is a member of the innate immune system and recognizes bacterial and vertebrate DNA in cells. In addition to being expressed in cells of the immune system, it is widely expressed in various types of human cancer, including prostate cancer. We have previously demonstrated that synthetic TLR9 ligands induce invasion in TLR9-expressing prostate cancer cells in vitro. However, the role of TLR9 in the pathophysiology of prostate cancer is unclear. The expression of TLR9 in radical prostatectomy samples (n=186) was studied using immunohistochemistry. TLR9 staining scores were compared with tumor stage, Gleason score and prostate-specific antigen (PSA) concentration prior to treatment and progression-free survival. Results revealed that 124 (66.7%) of the tumors were strongly positive, 59 (31.7%) were weakly positive and 3 (1.6%) were negative, for cytoplasmic TLR9 immunostaining in cancer cells. There was no significant association between cytoplasmic TLR9 expression and distributions of pT-class, prostatectomy sample margin status, Gleason score and preoperative PSA value. Prostate cancer-specific progression-free survival was significantly longer for patients whose tumors were graded as negative for cytoplasmic TLR9 expression, as compared with patients whose tumors were strongly immunopositive for cytoplasmic TLR9 (P=0.009). In the Cox regression analysis, high TLR9 expression was an independent marker of poor prognosis in prostate cancer. Expression of TLR9 is associated with poor progression-free survival in prostate cancer patients who were treated by radical prostatectomy with curative intent.
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Copy and paste a formatted citation
Spandidos Publications style
Väisänen M, Jukkola-Vuorinen A, Vuopala KS, Selander KS and Vaarala MH: Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer. Oncol Lett 5: 1659-1663, 2013.
APA
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K.S., Selander, K.S., & Vaarala, M.H. (2013). Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer. Oncology Letters, 5, 1659-1663. https://doi.org/10.3892/ol.2013.1204
MLA
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K. S., Selander, K. S., Vaarala, M. H."Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer". Oncology Letters 5.5 (2013): 1659-1663.
Chicago
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K. S., Selander, K. S., Vaarala, M. H."Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer". Oncology Letters 5, no. 5 (2013): 1659-1663. https://doi.org/10.3892/ol.2013.1204
Copy and paste a formatted citation
x
Spandidos Publications style
Väisänen M, Jukkola-Vuorinen A, Vuopala KS, Selander KS and Vaarala MH: Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer. Oncol Lett 5: 1659-1663, 2013.
APA
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K.S., Selander, K.S., & Vaarala, M.H. (2013). Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer. Oncology Letters, 5, 1659-1663. https://doi.org/10.3892/ol.2013.1204
MLA
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K. S., Selander, K. S., Vaarala, M. H."Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer". Oncology Letters 5.5 (2013): 1659-1663.
Chicago
Väisänen, M., Jukkola-Vuorinen, A., Vuopala, K. S., Selander, K. S., Vaarala, M. H."Expression of Toll-like receptor-9 is associated with poor progression-free survival in prostate cancer". Oncology Letters 5, no. 5 (2013): 1659-1663. https://doi.org/10.3892/ol.2013.1204
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