Word: antigen
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...tough, institutionalized atmosphere, and was filled with ex-inmates. Sanders sank into depression. He did not call his family to tell them what had happened or where he was. He spent his days contemplating his failures, which disgusted him. When doctors told him his prostate-specific antigen levels were high, which can be a harbinger of prostate cancer, he refused to get a biopsy...
First, it uses dead E. coli bacteria to deliver the antigen, or disease-causing agent that the body recognizes, to a cell in the immune system known as a macrophage...
This process amounts to a vaccination system, like childhood immunizations, keeping the body primed to destroy an antigen the next time it is detected...
Higgins had been using ovalbumin as his antigen protein in his research. In their unconnected work, the Hammersmith cancer researchers also had been using ovalbumin as a marker on melanoma cells, which cause a type of skin cancer...
Still unknown is whether screening someone for prostate cancer with blood tests that look for prostate-specific antigen (PSA) reduces the risk of death from prostate cancer. Studies designed to answer that question are under way. Until then, you will have to gather and weigh all the information you can when deciding how, or even whether, to treat prostate cancer...