The Genetizen

Genetizen

Advances in genetics and biotechnology are impacting society in provocative ways. The Genetizen is written by a select group of scientists, bioethicists, and healthcare professionals who provide you with expert analysis and commentary on many important issues.

Disclaimer: Opinions expressed in blog postings may or may not reflect the opinions of Geneforum. In addition, the content provided here is purely informational and not a substitute for advice from your personal physician.



Genetics resources on the Internet

I received an announcement today of a new wiki endeavor--wikigene. The site is intended to provide a location for gathering and coordinating information about individual human genes. Like other wiki sites, it will be open to contributions and editing by anyone who wishes to do so. There will be oversight to avoid posting obvious junk, but the idea of letting the interested community develop the majority of the text is being preserved. 

The launching of the site was announced today in PLoS Biology, an online peer-reviewed publication. I assume it is also being announced on PLoS Genetics, but I haven't received that notice yet. The article is described as follows:

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Selecting "healthy" embryos by preimplantation genetic diagnosis

I almost missed Good Morning America's piece about the couple who selected which embryos to implant so they could  "guarantee" that their child would not have breast cancer. So many, many misconceptions arise from this event, as well as challenges to individual personal values. Let me talk a bit about the misconceptions, since I'm not intending to challenge anyone's deeply held values. 

First, a great kudo for Robin, who carefully chose each word she spoke about the event and its implications.  Her introduction was clear and accurate, with just the right amount of interest and no hype. 

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Nutritional supplementation and genetics

My thanks today to Tammy Antzler, who supplied me with three references to information on research and progress in personalized nutrition. 

The first reference is a 75-page report from the Department of Health and Human Services on Personalized Health Care (PHC). The report details agencies of the government that are involved in the many different aspects of PHC. There are a few, very brief, references to diet, environnment, and genetics. These are generally genome studies--populations, not individuals.

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Will back door regulation work on genetic testing companies?

At least one of the companies cited in the States vs. genetic testing issue is fighting back. Their argument? DNA is data not blood.

As far as I'm concerned, their challenge is fantastic!

Advocates of genetic privacy and regulation of genetic testing have been urging the Federal government to get involved for some time and both the FDA and CMS (which handles Medicaid and Medicare) have said that it's too early to worry about regulations or oversight. So, New York and California have taken up the gauntlet and challenged companies offering genetic testing services "illegally" in their states.

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Who determines whether you can have a genetic test done?

Here's an interesting aspect of the recent crackdown on genetic testing labs by the states of California and New York. Shari Roan of CNN asked:

Should a doctor's authorization be required for someone to obtain personal genetic testing? So far, California and New York state authorities say yes. But this debate is just beginning. The controversy is being played out this week on the many genetic medicine blogs.

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Wired says, "Do not hinder genetic testing"

Fans of late night t.v. are familiar with "the top 10 reasons . . .", which are always given tongue-in-cheek. But, today's entry from Wired has a more serious note to it. Here are their top 10 reasons not to prohibit Californians and New York Staters from purchasing and using genetic testing offered over the Internet:

10. Early adopters are far from naive.

Ask yourself who spends $1,000 for the privilege of spitting in a vial and sending it off to Illumina for analysis by microarray. These people are responsible geeks, technophiles, Wired readers -- not the average Joe. They know darn well what to expect from these tests -- trivia and increased self-awareness.

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Genetic testing under fire

As I reported a month or two ago, some genetic testing firms have been receiving letters from some state officials telling the firms to prove they meet the state requirements for genetic testing or stop accepting test kits from residents. At first, it was only New York. Now, California has joined the fray. Although neither state agency will identify to whom the letters were sent, newspaper writers have been calling around to see if they can identify the perpetrators.

Most of the reports are based on a release from the Associated Press, which includes the following:

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Using genetic testing to improve mental health, 3

Information presented at NARSAD's 3rd annual Boston Mental Health Research Symposium on May 30 at the Harvard Medical School,and reported in Therapeutics Daily, included data on family traits that provide clues to genes for schizophrenia and bipolar disorder:

Deborah L. Levy, Ph.D, associate professor of psychology in the Department of Psychiatry at Harvard Medical School and director of the Psychology Research Laboratory at McLean Hospital, is studying families to detect relatives who are carriers of the genes for schizophrenia and bipolar disorder, even though these individuals don't have the diseases themselves.

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Using genetic testing to improve mental health, 2

How is new information being gained about genes helping us actually treat diseases? That was one focus of a series of presentations to NARSAD's 3rd annual Boston Mental Health Research Symposium on May 30 at the Harvard Medical School recently. According to an article in Therapeutics Daily,

. . .the studies are shedding new light on how specific genes contribute to the susceptibility to and pathology of schizophrenia, bipolar disorder and depression, some of the most severe, chronic and disabling mental illnesses that collectively affect an estimated 40 million Americans. Coming at a time when some treatments for mental illnesses are a matter of trial and error, these findings are paving the way for the development of novel therapies targeted to specific patients and to specific genes.

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Using genetic testing to improve mental health, 1

Part 1 of a series on genes and mental health. Taken from an article published in Therapeutics Daily.

Two genes have been identified as associated with schizophrenia:

  • GCPII (glutamate carboxypeptidase II), which controls the absorption of folate and may be deficient in people with schizophrenia,
  • MTHFR (methylenetetrahydrofolate reductase), which activates folate for use in the brain

Donald C. Goff, MD, director of the Schizophrenia Clinical and Research Program at Massachusetts General Hospital and a leading researcher on the role of genetics in the development of new treatments for schizophrenia, pioneered research that identified a link between low blood levels of folate and negative schizophrenia symptoms. Folate, given routinely to pregnant women as folic acid and often recommended for maintaining brain health in the elderly, is (according to the article) "involved in many different chemical pathways in the brain, including keeping levels of the amino acid homocysteine low. When homocysteine levels are too high, this interferes with the functioning of receptors located all over the brain -- called NMDA ( N-methyl-D-aspartate) receptors -- that are critical to learning, memory, brain development, and general neural processing."

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Using the results of genetic testing to improve medical treatment

So far, many of my posts on genetic testing have been focused on the availability of testing, quality of testing, and interpreting the results. I'm getting a bit bored--and perhaps you are too--of repeated suggestions that genetic testing available to the public is not yet as useful as headlines often state. If you haven't gotten the message yet, read some of the old posts in this theme.

Today, I want to move on to ways in which scientists and physicians are using the results of targeted genetic testing--that is, working with a specific gene rather than the whole genome--to identify potential therapies for conditions that are not fully responding to current therapies.

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Gene-Based Tests Need Better Monitoring, Federal Study Finds

Here's an article from Medical News Today about genetic testing:

A new report on genetic testing from HHS' Agency for Healthcare Research and Quality calls for the creation of improved public health surveillance databases and health information technologies to monitor the use of gene-based tests and their impact on patient outcomes.

Funded by Centers for Disease Control and Prevention, the report entitled, Infrastructure to Monitor Utilization and Outcomes of Gene-based Applications: An Assessment, found current public health monitoring systems lack the capability to monitor the use or outcomes of gene-based tests and treatments. Report authors identified several limitations of existing databases and potential solutions to overcome these limitations.

Researchers agreed that the development of gene-based tests is outpacing the evaluation of their accuracy and clinical utility. Gene-based tests may, in some cases, help make early diagnosis of a disease, improve risk prediction, and target therapies for both traditional gene-based disorders as well as common chronic diseases. However, since all tests and treatments are not expected to have the same amount of benefit, experts said it is important to distinguish beneficial tests and treatments from those that have little or no benefit or that may even harm the public.

Many gene-based tests are only recommended for people with certain risk factors. For example, the U.S. Preventive Services Task Force recommends primary care physicians should refer only high-risk women for genetic counseling and testing to detect gene mutations associated with breast or ovarian cancers. The Task Force recommends that women who do not have a family history of either breast or ovarian cancer and are unlikely to test positive for the mutations should not be referred for testing, as there are potential harms involved in genetic testing including false-positive test results. Also, the Task Force recommends against routine genetic screening in the general population for Hereditary Hemochromatosis, a genetic disease that causes the body to absorb and store too much iron.

Better monitoring capabilities would help identify which gene-based tests improve patient outcomes and are cost-effective, researchers found. By 2009, the world market for gene-based testing is expected to reach $12.5 billion.

More than 1,000 gene-based tests are now available to consumers via their clinicians, and many more are expected to become available in the near future. Some of these tests are marketed directly to consumers. The Federal Trade Commission has issued a consumer alert on at-home genetic testing and urges consumers to be skeptical of claims made by companies that are marketing these tests directly to consumers. AHRQ recommends patients consult with their clinicians to evaluate their risk factors and determine their need for genetic testing.

The report is available online.

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President Bush Signs Landmark Genetic Nondiscrimination Information Act Into Law

Here's the latest from Genetic Alliance and The Coalition for Genetic Fairness (copied directly from the news release):

Washington, D.C. – May 21, 2008 – The Coalition for Genetic Fairness (http://www.geneticfairness.org/) commends President George W. Bush for signing into law today the first civil rights legislation of the new millennium, the Genetic Information Nondiscrimination Act (GINA). GINA is the first and only federal legislation that will provide protections against discrimination based on an individual’s genetic information in health insurance coverage and employment settings.

“This is a tremendous victory for every American not born with perfect genes – which means it’s a victory for every single one us,” said Representative Louise Slaughter (D-NY). “Since all of us are predisposed to at least a few genetic-based disorders, we are all potential victims of genetic discrimination.”

“Today marks the beginning of a new era in health care,” continued Slaughter. “Americans can finally take advantage of the tremendous potential of genetic research without the fear that their own genetic information will be used against them.”

Just a few weeks ago, GINA received overwhelming support in both the Senate, with a unanimous vote of approval, and the House of Representatives, where the legislation was passed by a landslide vote of 414-1.

”Individuals no longer have to worry about being discriminated against on the basis of their genetic information, and with this assurance, the promise of genetic testing and disease management and prevention can be realized more fully,” stated Sharon Terry, president of the Coalition and CEO of Genetic Alliance (http://www.geneticalliance.org/).“We applaud our champions on the Hill who have worked tirelessly to pass this important legislation. It is now our responsibility to make sure the public knows that these new protections are in place.”

The health insurance protections offered by GINA are expected to roll out 12 months after the bill is signed, whereas the employment protections will be fully realized in 18 months.

“Now that GINA has been approved and signed into federal law by the President, American health care consumers and employees will no longer have to fear the adverse effects of being tested to determine their risk status for genetic diseases,” said Joann Boughman, Ph.D., executive vice president of the American Society of Human Genetics (http://www.ashg.org/) and a member of the Coalition’s executive committee. “Once this legislation has taken effect, clinicians will be able to order genetic tests for patients and their families in a manner that ensures the full realization of the advantages of personalized medicine models, while easing patients’ concerns about the risk of genetic discrimination by insurance companies and employers based on this data.”

Specifically, the legislation protects against genetic discrimination by health insurers or employers by:

• Prohibiting group health plans and issuers offering coverage on the group or individual market from basing eligibility determinations or adjusting premiums or contributions on the basis of genetic information. They cannot request, require or purchase the results of genetic tests, or disclose genetic information.

• Prohibiting issuers of Medigap policies from adjusting pricing or conditioning eligibility on the basis of genetic information. They cannot request, require or purchase the results of genetic tests, or disclose genetic information.

• Prohibiting employers from firing, refusing to hire, or otherwise discriminating with respect to compensation, terms, conditions or privileges of employment. Employers may not request, require or purchase genetic information, and may not disclose genetic information. Similar provisions apply to employment agencies and labor organizations.

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Genetic discrimination vs. equality

Time magazine includes an essay in response to sending GINA (Genetic Information Nondiscrimination Bill) on to the President for his signature.

Sidenote: why hasn't he signed it yet? Perhaps he's setting up a good photo op akin to the carrier picture.

Anyway, Michael Kingsley thinks that discrimination on the basis of genetic information is no different from any other type of actuarial discrimination followed by the insurance companies. After all, they reject customers with other problems (diabetes, cancer, etc.), why not genetic information?

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ELSI: Ethical, legal, and social issues of genomics

Just returned from a conference in Cleveland, Ohio, dealing with the many different aspects and potential effects of sequencing the human genome. I'll write in the next couple of days about items that particularly interested me.

But first, what is genomics?

I hate to admit it, but when I first joined a group at the Utah Department of Health to discuss genomics, I had no idea what it was. Surprising to me was the fact that others gave me quick definitions, but they varied considerably. So, here's some of the ones you might consider:

Wikipedia: Genomics is the study of an organism's entire genome. The field includes intensive efforts to determine the entire DNA sequence of organisms and fine-scale genetic mapping efforts. The field also includes studies of intragenomic phenomena such as heterosis, epistasis, pleiotropy and other interactions between loci and alleles within the genome. In contrast, the investigation of single genes, their functions and roles, something very common in today's medical and biological research, and a primary focus of molecular biology, does not fall into the definition of genomics, unless the aim of this genetic, pathway, and functional information analysis is to elucidate its effect on, place in, and response to the entire genome's networks.

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