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Stem cells may solve mystery of early pregnancy breast cancer protection
Date:9/16/2008

ions and are probably the most susceptible to giving rise to breast cancer," said Li. Thus, the more stem cells an animal has, the more likely the animal is to developing breast cancer.

However, Li stressed that this is just a theory.

He also noted that the protective effect of pregnancy is seen across the lifetime. The effect is not immediate. He studied the effect in mice that were 10 months old the equivalent to 50 to 60 years old in humans.

"We saw that the stem cells are reduced," he said. "We know that breast cancer risk is reduced. This is an association. We have not proven that reducing the number of stem cells actually reduces the risk of breast cancer."

That is the next step he plans to take in his research.


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Contact: Kimberlee Norton
kknorton@bcm.edu
713-798-4710
Baylor College of Medicine
Source:Eurekalert

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