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Cellular origin of a rare form of breast cancer identified
Date:9/22/2011

reast cancers for which the best course of treatment has not yet been determined," said Kuperwasser, PhD, associate professor in the department of anatomy and cellular biology, Tufts University School of Medicine, and a member of the genetics and cell, molecular & developmental program faculties at the Sackler School of Graduate Biomedical Sciences at Tufts and the Molecular Oncology Research Institute (MORI) at Tufts Medical Center.

In light of this, the research team chose to study the two major types of cells in the human breast, those that line the ducts and produce milk (luminal cells) and those that surround the ductal cells and contract to move the milk from the ducts (basal/myoepithelial cells) to determine whether they might form different types of breast cancers.

"We found that when basal/myoepithelial breast cells become cancerous they no longer resemble breast tissue; instead they look more like cells of the skin and form rare metaplastic breast cancers. In contrast, when luminal breast cells become cancerous, they retain the structure and molecular features of more common types of breast cancers," said first author Patricia Keller, PhD, post-doctoral associate in the anatomy and cellular biology department at TUSM and a member of the Kuperwasser lab and MORI.

The researchers introduced cancer-causing genes into healthy breast cells obtained from breast reduction surgeries. Using specialized markers, they were able to isolate different types of normal breast cells and evaluate how they behaved as they became cancerous in a mouse model.

"By understanding more about the cellular beginnings of cancer, we can direct our research toward investigating preventive methods and possibly even developing new therapies," said Kuperwasser.

This study adds to Kuperwasser's growing body of work in breast cancer research. Earlier work identified a mechanism behind the preferential formation of aggressive breast cancers in pe
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Contact: Siobhan E. Gallagher
617-636-6586
Tufts University, Health Sciences Campus
Source:Eurekalert

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