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Discovery and Horizontal Follow-up of an Autoantibody Signature in Human Prostate Cancer

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Specialty Science
Date 2015 Feb 13
PMID 25675522
Citations 29
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Abstract

In response to an urgent need for improved diagnostic and predictive serum biomarkers for management of metastatic prostate cancer, we used phage display fingerprinting to analyze sequentially acquired serum samples from a patient with advancing prostate cancer. We identified a peptide ligand, CTFAGSSC, demonstrating an increased recovery frequency over time. Serum antibody reactivity to this peptide epitope increased in the index patient, in parallel with development of deteriorating symptoms. The antigen mimicking the peptide epitope was identified as alpha-2-Heremans-Schmid glycoprotein, also known as fetuin-A. Metastatic prostate cancer cell lines and bone metastasis samples displayed robust fetuin-A expression, and we demonstrated serum immune reactivity to fetuin-A with concomitant development of metastatic castrate-resistant disease in a large cohort of prostate cancer patients. Whereas fetuin-A is an established tumor antigen in several types of cancer, including breast cancer, glioblastoma, and pancreas cancer, this report is to our knowledge the first study implicating fetuin-A in prostate cancer and indicating that autoantibodies specific for fetuin-A show utility as a prognostic indicator for prostate cancer patients prone to progress to metastatic disease.

Citing Articles

The Role of Fetuin-A in Tumor Cell Growth, Prognosis, and Dissemination.

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Autoantibodies in cancer: a systematic review of their clinical role in the most prevalent cancers.

Montero-Calle A, Garranzo-Asensio M, Moreno-Casbas M, Campuzano S, Barderas R Front Immunol. 2024; 15:1455602.

PMID: 39234247 PMC: 11371560. DOI: 10.3389/fimmu.2024.1455602.


Prostate cancer autoantibodies - applications in diagnosis, prognosis, monitoring disease progression and immunotherapy.

Jayakrishnan R, Schafer C, Tan S Am J Clin Exp Urol. 2023; 11(2):79-102.

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Serum fetuin-A and RANKL levels in patients with early stage breast cancer.

Afsar C, Aral H, Can O, Can T, Karacetin D, Ali N J Med Biochem. 2023; 42(2):249-257.

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Identification of novel serological autoantibodies in Chinese prostate cancer patients using high-throughput protein arrays.

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