By Robert I. Field, Anthony W. Orlando and Arnold J. Rosoff
The “pangenome” project that is mapping the genetic sequences of 47 diverse human beings from around the world is a much-needed step forward for science and humanity. The lack of racial diversity in genetic databases used in research has been noted for some time, and it has raised growing concerns about the development of clinical applications based on research results. The pangenome does not eliminate these concerns, but it calls greater attention to the significant racial underrepresentation that remains in most databases currently used in research.
For genomic medicine to have widespread effectiveness, it is important that it be based on the study of a diverse pool of subjects. This is especially true in the development of “precision medicine,” in which therapies are tailored to a patient’s genetic characteristics. If a patient’s genetic traits are not represented in a database that was used for the research that led to a treatment, that treatment may be less effective or even risky for them.
Black Americans, as well as members of other racial and ethnic minorities, are most commonly underrepresented in medical research, yet they are the ones most vulnerable to the effects of such underrepresentation. This can create yet another instance of racial disadvantage in health care. However, a recent study of genetic researchers found that investigators tend to give only limited consideration to demographic diversity when selecting a database to use, with more attention paid to ease of access and other logistical considerations.
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