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First biomarker discovered that predicts prostate cancer outcome
Date:8/14/2007

between 1995 and 1998. All tumors and precancerous tissues displayed B7-H3, but patients with the highest levels of B7-H3 within their prostate tumors (19.8 percent) were four times more likely to experience cancer progression compared to those with weak levels of B7-H3 within their tumors. Moderate levels of B7-H3 also correlated with a slightly higher risk of recurrence (35 percent).

Because B7-H3 is present in all prostate cancer tumors, and marked levels predict recurrence, we are able to forecast with much greater certainty the likelihood of cancer progression, regardless of therapeutic intervention, says Eugene Kwon, M.D., a senior investigator and urologist at Mayo Clinic.

For some patients, a watchful waiting clinical approach is sometimes used to manage prostate cancer prior to resorting to therapy to see if the cancer becomes increasingly aggressive. The researchers say that the evaluation of B7-H3 levels in prostate biopsies from patients may soon help to determine which patients may benefit from a watchful waiting strategy versus early aggressive treatment.

Individualized Medicine Emerges

Mayo Clinics findings on biomarker identification may accelerate the development of new forms of therapy, say the researchers. Additionally, prostate cancer now joins kidney cancer as a malignancy that can be tracked and predicted based on the presence of B7-H immune molecules.

This is the way of the future, says Dr. Kwon, We are becoming educated about ways to flesh out the molecular signatures of each patients cancer. Using such molecular signatures will facilitate, for the first time, a truly individualized approach to prescribing the most appropriate therapy for a given patient. We will soon be able to tailor-make therapies for each persons cancer.

B7-H3 in the Future

To understand how B7-H3 affects the immune system, and whether a mutation of B7-H3 is involved in the anti-immune activity
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Contact: Elizabeth Zimmermann
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

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