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Article

Osteopontin is a tumor autoantigen in prostate cancer patients

  • Authors:
    • Tatiana M. Tilli
    • Eloísio A. Silva
    • Lívia C. Matos
    • Douglas V. Faget
    • Bianca F.P. Dias
    • Juliana S.P. Vasconcelos
    • Yasuyuki Yokosaki
    • Etel R.P. Gimba
  • View Affiliations / Copyright

    Affiliations: Programa de Medicina Experimental and Biologia Celular and Post Graduation Program in Oncology, Coordenação de Pesquisa, Instituto Nacional de Câncer, Universidade do Estado do Rio de Janeiro, Rio de Janeiro-RJ, Brazil, Serviço de Urologia, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro-RJ, Brazil, Universidade de Brasília, Brasília-DF, Brazil, Cell-Matrix Frontier Laboratory Biomedical Research Building, Hiroshima University, Minamiku, Hiroshima, Japan
  • Pages: 109-114
    |
    Published online on: November 23, 2010
       https://doi.org/10.3892/ol.2010.211
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Abstract

Anti-tumor antibodies act as biomarkers for the early diagnosis of prostate cancer (PCa). Osteopontin (OPN) is overexpressed in PCa cells and contributes to the progression of the disease. This study aimed to evaluate whether OPN evokes a humoral immune response in PCa patients and whether the reactivity levels of anti-OPN antibodies may be used to better differentiate PCa from benign and healthy donor plasma samples. Plasma samples from biopsy-proven PCa patients (29), benign prostate hyperplasia (BPH) (18) and control healthy donors (HD) (30) were tested by immunoblots using the recombinant human OPN. The frequency of anti-OPN antibodies was significantly higher in PCa (66%) plasma samples as compared to BPH (33%) and HD controls (10%). Anti-OPN antibodies were detected in a high proportion of plasma samples from patients with a Gleason score of less than 6 (57%), prostate-specific antigen levels lower than 10 ng/ml (67%) and pT2 organ-confined disease (70%), suggesting that anti-OPN antibodies may be used as an early serum marker for PCa. To the best of our knowledge, this is the first description of OPN as a tumor autoantigen and one of the most reactive individual autoantigens described thus far. These data support the inclusion of OPN in a multiplex of tumor antigens in order to perform antibody profiling in PCa as well as in other malignancies overexpressing OPN.
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Copy and paste a formatted citation
Spandidos Publications style
Tilli TM, Silva EA, Matos LC, Faget DV, Dias BF, Vasconcelos JS, Yokosaki Y and Gimba ER: Osteopontin is a tumor autoantigen in prostate cancer patients. Oncol Lett 2: 109-114, 2011.
APA
Tilli, T.M., Silva, E.A., Matos, L.C., Faget, D.V., Dias, B.F., Vasconcelos, J.S. ... Gimba, E.R. (2011). Osteopontin is a tumor autoantigen in prostate cancer patients. Oncology Letters, 2, 109-114. https://doi.org/10.3892/ol.2010.211
MLA
Tilli, T. M., Silva, E. A., Matos, L. C., Faget, D. V., Dias, B. F., Vasconcelos, J. S., Yokosaki, Y., Gimba, E. R."Osteopontin is a tumor autoantigen in prostate cancer patients". Oncology Letters 2.1 (2011): 109-114.
Chicago
Tilli, T. M., Silva, E. A., Matos, L. C., Faget, D. V., Dias, B. F., Vasconcelos, J. S., Yokosaki, Y., Gimba, E. R."Osteopontin is a tumor autoantigen in prostate cancer patients". Oncology Letters 2, no. 1 (2011): 109-114. https://doi.org/10.3892/ol.2010.211
Copy and paste a formatted citation
x
Spandidos Publications style
Tilli TM, Silva EA, Matos LC, Faget DV, Dias BF, Vasconcelos JS, Yokosaki Y and Gimba ER: Osteopontin is a tumor autoantigen in prostate cancer patients. Oncol Lett 2: 109-114, 2011.
APA
Tilli, T.M., Silva, E.A., Matos, L.C., Faget, D.V., Dias, B.F., Vasconcelos, J.S. ... Gimba, E.R. (2011). Osteopontin is a tumor autoantigen in prostate cancer patients. Oncology Letters, 2, 109-114. https://doi.org/10.3892/ol.2010.211
MLA
Tilli, T. M., Silva, E. A., Matos, L. C., Faget, D. V., Dias, B. F., Vasconcelos, J. S., Yokosaki, Y., Gimba, E. R."Osteopontin is a tumor autoantigen in prostate cancer patients". Oncology Letters 2.1 (2011): 109-114.
Chicago
Tilli, T. M., Silva, E. A., Matos, L. C., Faget, D. V., Dias, B. F., Vasconcelos, J. S., Yokosaki, Y., Gimba, E. R."Osteopontin is a tumor autoantigen in prostate cancer patients". Oncology Letters 2, no. 1 (2011): 109-114. https://doi.org/10.3892/ol.2010.211
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