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Breast cancer patients who lack RB gene respond better to neoadjuvant chemotherapy
Date:7/26/2012

PHILADELPHIABreast cancer patients whose tumors lacked the retinoblastoma tumor suppressor gene (RB) had an improved pathological response to neoadjuvant chemotherapy, researchers at Thomas Jefferson University Hospital and the Kimmel Cancer Center at Jefferson report in a retrospective study published in a recent online issue of Clinical Cancer Research.

Many breast cancer patients undergo neoadjuvant therapy to reduce the size or extent of the cancer before surgical intervention. Complete response of the tumor to such treatment signifies an improved overall prognosis. Today, no marker is applied to identify tumors which will respond to such treatment, and as a result, only a subset of patients exhibit benefit from it.

"We found that loss of RB was associated with better pathological response rates in breast cancer patientsat various stages and representing multiple molecular subtypeswho were administered neoadjuvant chemotherapy," said Agnieszka Witkiewicz, M.D., Associate Professor of Pathology, Anatomy and Cell Biology at Thomas Jefferson University.

Erik Knudsen, Ph.D, Professor of Cancer Biology and the Hilary Koprowski Chair in Cancer Biology, was excited that discoveries from his life-long research on the RB-pathway were making there way into the clinic.

"This represents a potential new biomarker that could be used to tailor treatment plans for women considering neoadjuvant therapy and is a testament to the importance of cancer research," he said.

For the study, researchers, including Gordon Schwartz, M.D., Director of the '/>"/>

Contact: Steve Graff
stephen.graff@jefferson.edu
215-955-5291
Thomas Jefferson University
Source:Eurekalert

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