PMID- 17938645 OWN - NLM STAT- MEDLINE DCOM- 20090114 LR - 20081110 IS - 1476-5608 (Electronic) IS - 1365-7852 (Linking) VI - 11 IP - 4 DP - 2008 TI - HLA class II antigen presentation by prostate cancer cells. PG - 334-41 AB - Prostate cancer is the second most commonly diagnosed cancer in men. Recent evidence suggests that reduced expression of target protein antigens and human leukocyte antigen (HLA) molecules is the predominant immune escape mechanism of malignant prostate tumor cells. The purpose of this study was to investigate the prospect of antigen specific immunotherapy against prostate cancer via the HLA class II pathway of immune recognition. Here, we show for the first time that prostate cancer cells express HLA class II proteins that are recognized by CD4+ T cells. Prostate tumor cells transduced with class II molecules efficiently presented tumor-associated antigens/peptides to CD4+ T cells. This data suggests that malignant prostate tumors can be targeted via the HLA class II pathway, and that class II-positive tumors could be employed for direct antigen presentation, and CD4+ T-cell mediated tumor immunotherapy.Prostate Cancer and Prostatic Diseases (2008) 11, 334-341; doi:10.1038/sj.pcan.4501021; published online 16 October 2007. FAU - Younger, A R AU - Younger AR AD - Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC29425, USA. FAU - Amria, S AU - Amria S FAU - Jeffrey, W A AU - Jeffrey WA FAU - Mahdy, A E M AU - Mahdy AE FAU - Goldstein, O G AU - Goldstein OG FAU - Norris, J S AU - Norris JS FAU - Haque, A AU - Haque A LA - eng GR - P01 CA97132/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20071016 PL - England TA - Prostate Cancer Prostatic Dis JT - Prostate cancer and prostatic diseases JID - 9815755 RN - 0 (Histocompatibility Antigens Class II) SB - IM MH - Antigen Presentation/*immunology MH - Cell Culture Techniques MH - Cell Line, Tumor MH - Cell Membrane/immunology MH - Flow Cytometry MH - Histocompatibility Antigens Class II/*immunology MH - Humans MH - Male MH - Prostatic Neoplasms/*immunology MH - T-Lymphocytes/immunology EDAT- 2007/10/17 09:00 MHDA- 2009/01/15 09:00 CRDT- 2007/10/17 09:00 PHST- 2007/10/17 09:00 [pubmed] PHST- 2009/01/15 09:00 [medline] PHST- 2007/10/17 09:00 [entrez] AID - 4501021 [pii] AID - 10.1038/sj.pcan.4501021 [doi] PST - ppublish SO - Prostate Cancer Prostatic Dis. 2008;11(4):334-41. doi: 10.1038/sj.pcan.4501021. Epub 2007 Oct 16.