WASHINGTON — Human genes may not be patented, the Supreme Court ruled unanimously Thursday. The decision is likely to reduce the cost of genetic testing for some health risks, and it may discourage investment in some forms of genetic research.
The case concerned patents held by Myriad Genetics, a Utah company, on genes that correlate with an increased risk of hereditary breast and ovarian cancer. The patents were challenged by scientists and doctors who said their research and ability to help patients had been frustrated.
After the ruling, at least three companies and two university labs said that they would begin offering genetic testing in the field of breast cancer.
“Myriad did not create anything,” Justice Clarence Thomas wrote for the court. “To be sure, it found an important and useful gene, but separating that gene from its surrounding genetic material is not an act of invention.”
The course of scientific research and medical testing in other fields will also be shaped by the court’s ruling, which drew a sharp distinction between DNA that appears in nature and synthetic DNA created in the laboratory. That distinction may alter the sort of research and development conducted by the businesses that invest in the expensive work of understanding genetic material.
The decision tracked the position of the Obama administration, which had urged the justices to rule that isolated DNA could not be patented, but that synthetic DNA created in the laboratory — complementary DNA, or cDNA — should be protected under the patent laws. In accepting that second argument, the ruling Thursday provided a partial victory to Myriad and other companies that invest in genetic research.
The particular genes at issue received public attention after actress Angelina Jolie revealed in May that she had had a preventive double mastectomy after learning that she had inherited a faulty copy of a gene that put her at high risk for breast cancer.
The price of the test, often more than $3,000, was partly a product of Myriad’s patent, putting it out of reach for some women.
That price “should come down significantly,” said Dr. Harry Ostrer, one of the plaintiffs in the case, as competitors start to offer their own tests. The ruling, he said, “will have an immediate impact on people’s health.”
In a statement, Myriad’s president, Peter D. Meldrum, said the company still had “strong intellectual property protection” for its gene testing.
The central question for the justices in the case, Association for Molecular Pathology v. Myriad Genetics, No. 12-398, was whether isolated genes are “products of nature” that may not be patented or “human-made inventions” eligible for patent protection.