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SSS 2010-04-20

时间:2010-06-11 02:00来源:互联网 提供网友:swalloer   字体: [ ]
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    (单词翻译:双击或拖选)

How’s this for a possible new culprit for breast cancer sufferers: they may be able to blame their grandmas’ diets. That’s the implication of a study done with rats. Researchers affiliated1 with the Georgetown University Medical Center fed a group of pregnant rats a high-fat diet throughout their gestation2, with 43 percent of calories coming from fat. A control group ate a normal diet. Both groups consumed the same total calories. All the rats’ offspring and the next generation, the granddaughters, ate a normal diet.

That high-fat diet increased breast cancer in the rats’ female offspring. And, more surprisingly, it apparently4 increased breast cancer in the granddaughters. They had an 80 percent chance of developing the disease, compared with 50 percent in the control group. The results were presented at the meeting of the American Association for Cancer Research.

Researchers theorize that the high-fat diet may change gene3 expression in the grandmothers in a way that somehow affects subsequent generations and leads to a greater breast cancer risk. The scientists say this may mean that pregnant moms should eat well not only for the health of their offspring but for future generations as well.

Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber.


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1 affiliated 78057fb733c9c93ffbdc5f0ed15ef458     
adj. 附属的, 有关连的
参考例句:
  • The hospital is affiliated with the local university. 这家医院附属于当地大学。
  • All affiliated members can vote. 所有隶属成员都有投票权。
2 gestation L6ey2     
n.怀孕;酝酿
参考例句:
  • The gestation period can be anything between 95 and 150 days.妊娠期从95天至150天不等。
  • This film was two years in gestation.这部电影酝酿了两年。
3 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
4 apparently tMmyQ     
adv.显然地;表面上,似乎
参考例句:
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
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