The price of sequencing your whole genome is dropping so rapidly that it soon may cost about $1,000 to know your entire genetic blueprint. Our whole genome sequence data can reveal predispositions to diabetes, cancer or psychiatric conditions. It can even help a doctor prescribe the right dosage of certain medications. It will soon be less expensive to sequence your entire genome – to know its more than 20,000 genes and 6 billion DNA building blocks – than to perform some individual genetic tests for cancer or metabolic diseases.
Doctors and researchers believe that this achievement will revolutionize medicine. The ability to link variations in DNA with health and disease could mean radical new ways to predict and treat not just cancer but also heart disease, diabetes, Alzheimer’s and schizophrenia.
The issue is that these potentially lifesaving discoveries depend on large numbers of people sharing their private information to enable researchers to compare large genomic databases with relevant disease states, and sharing data is still far from risk free. Individuals are not likely to have confidence in the system until we develop and enact state and federal laws governing the use of genomic sequencing data.
Right now, in most states, almost anything goes. For instance, someone could legally pick up your discarded coffee cup and send a minuscule sample of your saliva out for sequencing to determine if you show a predisposition to neurodegenerative disease. Surreptitious genetic sequencing of this sort could become a whole new arms race in conflicts ranging from custody cases to boardroom battles – unless we act soon to bring some common sense to regulation.
Confusion has its consequences. Consider the case of Victoria Grove. A genetic test obtained through a private company came back positive for alpha-1 antitrypsin deficiency. The genetic illness means her body doesn’t make enough protein to protect her lungs and liver from damage. It can lead to emphysema and liver disease. Grove was unsure if such genetic information in her medical record might deny her health insurance or limit future employment prospects. So she didn’t tell her doctor for three years. It wasn’t until she was very ill with pneumonia and was having trouble getting the antibiotics she needed that she broke down in tears, confiding to a nurse: “I have alpha-1, and I need that antibiotic.” Today, Victoria says she wishes that her distrust of genetic privacy protections hadn’t led her to put her health at risk. Now her son still refuses to get tested for the disease, since he works for a small company and buys his own health insurance.