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Discovery halts breast cancer stem cells
Date:11/23/2010

rchers suspected that estrogen's actions were through a signaling mechanism from nearby cells that express the receptors.

"When nearby cells were exposed to estrogen, they secreted 14 times more FGF9, a signaling protein that drives CSC proliferation. When we blocked the FGF pathway with a small molecule inhibitor, we saw loss of CSC growth, tumorspheres generation, and even tumor formation. We then linked FGF signaling to the Tbx3 signaling axis, which is also important for embryonic mammary gland development," said first author Christine Fillmore, PhD, a 2009 graduate of the genetics program at the Sackler School and currently a research fellow in genetics at Children's Hospital Boston.

"These results show that interfering with this signaling pathway is a promising strategy for targeting breast CSCs. We are hopeful that the improved understanding of the mechanisms that promote breast CSCs will lead to the development of drugs that can be used to halt CSC proliferation," said Kuperwasser.

Kuperwasser also leads a laboratory at the Molecular Oncology Research Institute (MORI) at Tufts Medical Center, which is dedicated to the exploration of the molecular mechanisms of cancer and the translation of findings into the clinic.


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Contact: Siobhan E. Gallagher
617-636-6596
Tufts University, Health Sciences
Source:Eurekalert

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