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Activation of innate immunity by prostate specific antigen (PSA). | LitMetric

AI Article Synopsis

Article Abstract

Background: Prostate specific antigen (PSA) is a serine protease secreted by the prostatic epithelium. The only known function of the protein is to cleave seminogelin. We wished to determine if PSA activated peripheral blood mononuclear cells (PBMC).

Methods: PBMC and selected sub-populations were cultured with purified PSA. Secretion of IFNgamma was measured by cytokine capture flow cytometry and enzyme-linked immunosorbent assay.

Results: We observed secretion of IFNgamma and a proliferative response in PBMC cultured with PSA. We found that NK cells were the source of the IFNgamma but NK cells were not directly stimulated by PSA. Rather, a soluble factor secreted primarily by CD14 monocytes in response to PSA stimulated NK cells to secrete IFNgamma.

Discussion: PSA induces a pro-inflammatory response that results in the secretion of INFgamma by NK cells. The presence of large amounts of PSA could contribute to the common finding of inflammatory infiltrates in the prostate.

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Source
http://dx.doi.org/10.1002/pros.20414DOI Listing

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