Monday, August 27, 2012

The Ethics of Genome Analysis

Lots of people are having their genomes sequenced or otherwise analyzed for specific alleles. Those people should get all the information that comes out of the analyses although, hopefully, it will be scientifically correct information and any medical relevance will be explained by experts.1

There's another group of people who submit their genomes for research purposes only and they usually sign consent forms indicating that their name will not be associated with the results. Under those circumstances, the researchers should never have access to the individual's name or any circumstances that are not relevant to the study.

Apparently that simple ethical rule is not always standard practice. Gina Kolatea writes about some ethical issues in the New York Times: Genes Now Tell Doctors Secrets They Can’t Utter.

Here's an example from her article ...
One of the first cases came a decade ago, just as the new age of genetics was beginning. A young woman with a strong family history of breast and ovarian cancer enrolled in a study trying to find cancer genes that, when mutated, greatly increase the risk of breast cancer. But the woman, terrified by her family history, also intended to have her breasts removed prophylactically.

Her consent form said she would not be contacted by the researchers. Consent forms are typically written this way because the purpose of such studies is not to provide medical care but to gain new insights. The researchers are not the patients’ doctors.

But in this case, the researchers happened to know about the woman’s plan, and they also knew that their study indicated that she did not have her family’s breast cancer gene. They were horrified.
This is a rather simple case of the researchers violating a standard protocol. They should not have known the identity of the patient and they should not have known what she intended to do.

Most of the "ethical problems" in the article are of this type. They involve researchers who are supposed to be concentrating on research and not on the treatment of individual patients. Those researchers have no idea whether the patients already know which alleles they carry or whether they are already undergoing medical treatment. That's just as it should be. If a DNA donor doesn't want to be contacted then it's ethically wrong for the researchers to violate that contract no matter how justified they think they are being. Furthermore, it should be impossible for them to find out the name and address of the donor so the issue should never come up.

John Hawks thinks this is an interesting ethical problem and he wants his students to discuss it in his classes [Grasping the genomic palantir].
That case is ethically straightforward compared to others, because the researchers could make a difference to an immediate medical decision. On the other hand, how many risk-free research participants went ahead with prophylactic mastectomies because researchers didn't know about their plans?

I think the article will be a good one for prompting student discussions in my courses, and I'll likely assign it widely. But I think the central ethical problem discussed in the article is temporary.
What will students learn from discussing issues like these? What controls are in place to make sure that students are informed about all the ethical issues? Will they be told that standard scientific protocols were violated once the researchers knew what the patient intended to do?


1. "Experts" do NOT include employees of any for-profit company that took money for sequencing the genome.

No comments:

Post a Comment