Antibody responses to prostate-associated antigens in patients with prostatitis and prostate cancer
Article first published online: 14 JUL 2010
Copyright © 2010 Wiley-Liss, Inc.
Volume 71, Issue 2, pages 134–146, 1 February 2011
How to Cite
Maricque, B. B., Eickhoff, J. C. and McNeel, D. G. (2011), Antibody responses to prostate-associated antigens in patients with prostatitis and prostate cancer. Prostate, 71: 134–146. doi: 10.1002/pros.21229
- Issue published online: 22 DEC 2010
- Article first published online: 14 JUL 2010
- Manuscript Accepted: 10 JUN 2010
- Manuscript Received: 6 APR 2010
- NIH. Grant Number: K23 RR16489
- prostate cancer;
- high-throughput immunoblot
An important focus of tumor immunotherapy has been the identification of appropriate antigenic targets. Serum-based screening approaches have led to the discovery of hundreds of tumor-associated antigens recognized by IgG. Our efforts to identify immunologically recognized proteins in prostate cancer have yielded a multitude of antigens; however, prioritizing these antigens as targets for evaluation in immunotherapies has been challenging. In this report, we set out to determine whether the evaluation of multiple antigenic targets would allow the identification of a subset of antigens that are common immunologic targets in patients with prostate cancer.
Using a phage immunoblot approach, we evaluated IgG responses in patients with prostate cancer (n = 126), patients with chronic prostatitis (n = 45), and men without prostate disease (n = 53).
We found that patients with prostate cancer or prostatitis have IgG specific for multiple common antigens. A subset of 23 proteins was identified to which IgG were detected in 38% of patients with prostate cancer and 33% patients with prostatitis versus 6% of controls (P < 0.001 and P = 0.003, respectively). Responses to multiple members were not higher in patients with advanced disease, suggesting antibody immune responses occur early in the natural history of cancer progression.
These findings suggest an association between inflammatory conditions of the prostate and prostate cancer, and suggest that IgG responses to a panel of commonly recognized prostate antigens could be potentially used in the identification of patients at risk for prostate cancer or as a tool to identify immune responses elicited to prostate tissue. Prostate 71: 134–146, 2011. © 2010 Wiley-Liss, Inc.