Lifton's group found that 2 percent of the subjects carried one defective copy of one of the three genes.

Lifton小组发现2%的受试者携带三个基因中的一个缺陷基因。

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The researchers speculated that people who carry only one defective copy might be less prone to hypertension.

研究人员推测只携带一个缺陷基因的人可能更容易发生高血压。

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Women carrying a defective copy of the BRCA1 gene have upto an 80 percent lifetime risk of developing the disease, doctors have found.

年夜夫发现，携带出缺陷的BRCA1基因的妇女中，多达80%的人会得乳腺癌。

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Some 600, 000 Americans have a less severe version caused by one defective copy. (There would be more of the double-gene victims if they didn't die young.) To get its drug approved Isis will need to study 45 patients with the severe two-gene form and a few hundred with the single-gene disease.

FORBES: Degunker

If it is safe, the medicine could also be used for patients who have a single copy of the defective gene.

FORBES

The idea of treating disease by replacing a defective gene with a working copy gained credence in 1990 with the success of the world's first gene therapy clinical tests against a rare condition called severe combined immunodeficiency (SCID).

MSN: European regulators back first gene therapy drug