VOA慢速英语 新的研究与"抑郁基因"发现之间的争议

　　Last week, however, other researchers published findings of a large new study. They report finding no link between the serotonin transporter gene and the risk of depression. The findings appeared in the Journal of the American Medical Association.

　　Neil Risch is director of the University of California, San Francisco, Institute for Human Genetics and a leader of the new study. He says the earlier study gained so much recognition, it became -- in his words -- "fixed in many people's minds as true."

　　The National Institute of Mental Health and Kaiser Permanente Northern California also took part in the latest study.

　　The researchers used information from fourteen studies involving more than fourteen thousand patients. The scientists examined the data using the same measures as the two thousand three study.

　　They found that the risk of depression was not higher among those with the shorter gene. But they also found that stressful events themselves did appear to increase the risk for depression.

　　Neuroscientist Avshalom Caspi, then at Kings College London, led the two thousand three study. He is now at Duke University in North Carolina. He has criticized the new study as incomplete. He says it ignores evidence that supports the original research.

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