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Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
History. PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [ 1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [ 2]
A public service announcement (PSA) is a message in the public interest disseminated by the media without charge to raise public awareness and change behavior. Oftentimes these messages feature unsettling imagery, ideas or behaviors that are designed to startle or even scare the viewer into understanding the consequences of undergoing a particular harmful action or inaction (such as pictures ...
The #1 Unexpected Prostate Cancer Sign, According to Urologists. Believe it or not, bone pain is a potential prostate cancer symptom. Unfortunately, people with prostate cancer who are ...
Prostate cancer screening. Purpose. Detect prostate cancer (when no symptoms are present) Prostate cancer screening is the screening process used to detect undiagnosed prostate cancer in men without signs or symptoms. [ 1][ 2] When abnormal prostate tissue or cancer is found early, it may be easier to treat and cure, but it is unclear if early ...
The PSA Group (French pronunciation: [ɡʁup pe ɛs ɑ]), legally known as Peugeot S.A. (Peugeot Société Anonyme, trading as Groupe PSA; formerly known as PSA Peugeot Citroën from 1991 to 2016) was a French multinational automotive manufacturing company which produced automobiles and motorcycles under the Peugeot, Citroën, DS, Opel and Vauxhall brands.
The X family was a line of SOHC inline-four petrol engines used by PSA and Renault for supermini cars, notable for its integral transmission design (which lent it its common nickname the "suitcase engine"), and that it was designed for near horizontal installation. It was produced from 1972 through 1988, when it was replaced by the PSA TU engine.
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