From: HubMed - breast cancer <rssfwd@rssfwd.com>
Date: Wed, Jul 9, 2008 at 5:03 PM
Subject: The ShcA adaptor protein is a critical regulator of breast cancer progression.
To: mesothelioma77@gmail.com
[1]Cell Cycle. 2008 Apr 24; 7(13):
Ursini-Siegel J, Muller WJ
Breast cancer affects 1 in 8 North American women throughout their lifetime and is the second leading cause of cancer-related deaths. Breast cancer is a heterogeneous disease whose progression from hyperplasia to ductal carcinoma in situ and invasive carcinoma is regulated by the aberrant expression of multiple mediators; including growth factors, cytokines, chemokines and proteases that are produced both by the mammary tumor itself and the adjacent reactive stroma. These signals promote tumor cell proliferation, survival, establishment of a tumor vasculature, invasion and ultimately metastasis to secondary organs. Moreover, the ability of the tumor to create a state of local immune suppression allows tumor cells to evade clearance by the immune system. ShcA is an adaptor protein that relays extracellular signals downstream of receptor tyrosine kinases. Clinical studies suggest that activation of the ShcA signaling pathway is associated with poor patient prognosis. Moreover, recent studies with transgenic mouse models have clearly demonstrated the importance of tumor autonomous ShcA signaling, as well as signaling in cells comprising the tumor microenvironment, for the regulation of these biological processes, which contribute to breast cancer development and metastasis.
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Source: http://www.hubmed.org/display.cgi?uids=18604176
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