The majority opinion held that Myriad Genetics, Inc. holds valid "composition" patents on two isolated human genes, BRCA1 and BRCA2, which are linked to a predisposition to ovarian and breast cancer. The ruling restores the status quo ante that existed for more than a decade after the U.S. Patent Office issued the patents to Myriad. And it (mostly) overturns a 2010 federal trial court ruling that had voided the patents and concomitantly thrown this area of law and science (and commerce and medicine) into a tizzy. (Here is the take I wrote in April about that ruling and the oral argument which preceded Friday's announcement).
The central question of the case, then and now, was whether "isolated" human genes are unpatentable "products of nature" or patentable as "markedly different" compositions from their "unisolated" counterparts. After a lengthy dissertation on the science of DNA testing, and after dozens of pages dispatching with the jurisdictional aspects of the case, Judge Alan D. Lourie (who holds a PhD in chemistry) concluded:
In this case, the claimed isolated DNA molecules do not exist as in nature within a physical mixture to be purified. They have to be chemically cleaved from their chemical combination with other genetic materials. In other words, in nature, isolated DNAs are covalently bonded to such other materials. Thus, when cleaved, an isolated DNA molecule is not a purified form of a natural material, but a distinct chemical entity. In fact, some forms of isolated DNA require no purification at all, because DNAs can be chemically synthesized directly as isolated molecules.
Score one for Myriad, and its investors, in their aggressive efforts to preclude others in this field from working on the BRCA1 and BRCA2 genes. However, the Federal Circuit didn't give the patent holder a clean win. The appellate judges agreed with the trial judge that (all but one of) the company's "method" patent claims -- in which the company compared or analyzed BRCA sequences -- were not patentable. They were, instead "abstract mental processes" not covered by federal patent law. One such "method" patent, however, did pass the test: Myriad may continue to hold a patent on what the Court called its "method for screening potential cancer therapeutics via changes in cell growth rates."
Judge Kimberly A. Moore (who holds a degree in electrical engineering) saw things a little differently. She agreed with Judge Lourie that the plaintiffs had standing to fight Myriad's patent in court. And she ultimately agreed that most of Myriad's patents were valid. But her analysis -- both legal and scientific -- differed from that of Judge Lourie. In Judge Moore's view, the different chemical nature of the isolated DNA wasn't the only material factor to be considered in determining the validity of Myriad's patents. She focused instead upon the new "utility" the isolated DNA would have. She wrote:
The shorter isolated DNA sequences have a variety of applications and uses in isolation that are new and distinct as compared to the sequence as it occurs in nature. For example, these sequences can be used as primers in a diagnostic screen-ing process to detect gene mutations. These smaller isolated DNA sequences -- including isolated radiolabeled sequences mirroring those on the chromosome -- can also be used as the basis for probes. Naturally occurring DNA cannot be used to accomplish these same goals. Unlike the isolated DNA, naturally occurring DNA simply does not have the requisite chemical and physical properties needed to perform these functions.
Hedging her bet, Judge Moore also wrote:
If I were deciding this case on a blank canvas, I might conclude that an isolated DNA sequence that includes most or all of a gene is not patentable subject matter... This case, however, comes to us with a substantial historical background.
... I believe we must be particularly wary of expanding the judicial exception to patentable subject matter where both settled expectations and extensive property rights are involved. Combined with my belief that we should defer to Congress, these settled expectations tip the scale in favor of patentability. Congress has, for centuries, authorized an expansive scope of patentable subject matter. Likewise, the United States Patent Office has allowed patents on isolated DNA sequences for decades, and, more generally, has allowed patents on purified natural products for centuries. There are now thousands of patents with claims to isolated DNA, and some unknown (but certainly large) number of patents to purified natural products or fragments thereof.
In other words, whatever ambiguity that exists in federal patent law on human genome patenting ought to be resolved in the first place by legislators. Good luck with that, Judge Moore! It was left to the third judge on the Federal Circuit panel, Judge William C. Bryson, to dissent. First, he was blunt: "In its simplest form," he wrote, the question in this case is whether an individual can obtain patent right to a human gene. From a common sense point of view, most observers would answer, 'Of course not. Patents are for inventions. A human gene is not an invention.'"