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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-63564

Sais, Giovanni; Wyler, Stephen; Hudolin, Tvrtko; Banzola, Irina; Mengus, Chantal; Bubendorf, Lukas; Wild, Peter J; Hirsch, Hans H; Sulser, Tullio; Spagnoli, Giulio C; Provenzano, Maurizio (2012). Differential patterns of Large Tumor Antigen specific immune responsiveness in patients with BK polyomavirus positive prostate cancer or benign prostatic hyperplasia. Journal of Virology, 86(16):8461-8471.

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The role of the polyomavirus BK (BKV) large tumor antigen (L-Tag) as target of immune response in patients with prostate cancer (PCa) has not been investigated so far. In this study we have comparatively analyzed humoral and cellular L-Tag specific responsiveness in age matched patients bearing PCa or benign prostatic hyperplasia (BPH), expressing or not expressing BKV L-Tag specific sequences in their tissue specimens, and in non-age-matched healthy individuals. Furthermore, results from patients with PCa were correlated to 5-year follow-up clinical data focusing on evidence of biochemical recurrence (BR) following surgery (PSA≥0.2ng/ml).In peripheral blood mononuclear cells (PBMC) from patients with PCa with evidence of BR and BKV L-Tag positive tumors, stimulation with peptides derived from BKV L-Tag, but not those derived from Epstein Barr virus, influenza virus or Cytomegalovirus, induced a peculiar cytokine gene expression profile, characterized by high expression of IL-10 and TGFβ-1 and a low expression of IFN-γ genes. This pattern was confirmed by protein secretion data and correlated with high levels of anti BKV L-Tag IgG. Furthermore, in PBMC from these PCa bearing patients, L-Tag derived peptides significantly expanded an IL-10-secreting CD4(+)CD25(+(high))CD127(-(dim))FoxP3(+) T cell population with an effector memory phenotype (CD103(+)) capable of inhibiting proliferation of autologous anti-CD3/CD28 triggered CD4(+)CD25(-) T cells. Collectively, our findings indicate that potentially tolerogenic features of L-Tag specific immune response are significantly associated with tumor progression in patients with BKV+ PCa.


7 citations in Web of Science®
8 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Surgical Pathology
04 Faculty of Medicine > University Hospital Zurich > Urological Clinic
04 Faculty of Medicine > University Hospital Zurich > Division of Surgical Research
Dewey Decimal Classification:610 Medicine & health
Deposited On:19 Jul 2012 14:46
Last Modified:05 Apr 2016 15:53
Publisher:American Society for Microbiology
Publisher DOI:10.1128/JVI.00005-12
PubMed ID:22647697

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