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2002 JAN 10 - (NewsRx.com & NewsRx.net) -- The discovery of a protein that blocks the proliferation of cells in breast tissue could be good news for future generations of breast cancer sufferers.
During pregnancy, breast epithelial cells undergo tremendous proliferation with the number of cells increasing over 10 times. After babies are weaned, these epithelial cells undergo programmed cell death, reverting the breast epithelium back to a nonpregnant state.
Many researchers think it's just this ability to proliferate so rapidly that predisposes cells in the breast to a high risk of cancer. So Michael Karin and colleagues at the University of California, San Diego, in La Jolla, investigated the role of a subunit (alpha) of a regulatory protein kinase complex called I-(kappa)-B kinase (or IKK) in breast tissue. Their study is reported the Dec. 14, 2001, issue of the ...