title: Anti-Oligomannose Antibodies as Potential Serum Biomarkers of Aggressive Prostate Cancer.
abstract: [Table: see text] This study bridges a carbohydrate microarray discovery and a large-scale serological validation of anti-oligomannose antibodies as novel serum biomarkers of aggressive prostate cancer (PCa). Experimentally, a Man9-cluster-specific enzyme-linked immunosorbent assay was established to enable sensitive detection of anti-Man9 antibodies in human sera. A large-cohort of men with PCa or benign prostatic hyperplasia (BPH) whose sera were banked at Stanford University was characterized using this assay. Subjects included patients with 100% Gleason grade 3 cancer (n= 84), with Gleason grades 4 and/or 5 cancer (n= 204), and BPH controls (n= 135). Radical prostatectomy Gleason grades and biochemical (PSA) recurrence served as key parameters for serum biomarker evaluation. It was found that IgGMan9and IgMMan9were widely present in the sera of men with BPH, as well as those with cancer. However, these antibody reactivities were significantly increased in the subjects with the largest volumes of high grade cancer. Detection of serum IgGMan9and IgMMan9significantly predicted the clinical outcome of PCa post-radical prostatectomy. Given these results, we suggest that IgGMan9and IgMMan9are novel serum biomarkers for monitoring aggressive progression of PCa. The potential of oligomannosyl antigens as targets for PCa subtyping and targeted immunotherapy is yet to be explored.
authors.affiliation: Tumor Glycomics Laboratory, SRI International Biosciences Division, 333 Ravenswood Avenue, Menlo Park, CA 94025, USA ; Stanford University School of Medicine, Stanford, CA 94305, USA.
authors.forename: Denong
authors.initials: D
authors.lastname: Wang
authors.affiliation: Tumor Glycomics Laboratory, SRI International Biosciences Division, 333 Ravenswood Avenue, Menlo Park, CA 94025, USA ; Stanford University School of Medicine, Stanford, CA 94305, USA.
authors.forename: Laila
authors.initials: L
authors.lastname: Dafik
authors.affiliation: Department of Urology, Stanford University School of Medicine, Stanford, CA 94305, USA.
authors.forename: Rosalie
authors.initials: R
authors.lastname: Nolley
authors.affiliation: Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: SAS Institute Inc., SAS Campus Drive, Cary, NC 27513, USA.
authors.forename: Russell D
authors.initials: RD
authors.lastname: Wolfinger
authors.affiliation: Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
authors.forename: Lai-Xi
authors.initials: LX
authors.lastname: Wang
authors.affiliation: Department of Urology, Stanford University School of Medicine, Stanford, CA 94305, USA.
authors.forename: Donna M
authors.initials: DM
authors.lastname: Peehl
keywords: autoantibodies; carbohydrate microarray; oligomannose; prostate cancer