Doctors may soon be able to detect and monitor a patient's cancer with a simple blood test, reducing or eliminating the need for more invasive procedures, according to Purdue University research. A professor of biochemistry and member of the Purdue University Center for Cancer Research and colleagues identified a series of proteins in blood plasma that, when elevated, signify that the patient has cancer. Their findings were published in the early edition of the Proceedings of the National Academy of Sciences. His work was done with samples from breast cancer patients, but it is possible the method could work for any type of cancer and other types of diseases.

The work relies on analysis of microvesicles and exosomes in blood plasma. Protein phosphorylation, the addition of a phosphate group to a protein can lead to cancer cell formation. So phosphorylated proteins, known as…