And that’s all, folks

It appears I’ve come to the end of my genetic ancestry journey. I’ve covered the science behind the testing, the privacy and confidentiality concerns, the individual and social benefits of social networking, and the potential medical implications of testing. I’ve learned a lot about the technology, as well as a lot about my own ancestry. While my assignment may be due tonight, I’ll continue blogging if I find pertinent updates to my genetic genealogical picture!

Thanks for reading,

April 25, 2010 at 8:24 pm Leave a comment

Privacy concerns

Privacy concerns with respect to 23andMe services come in two main variations: informational privacy and decisional privacy. According to Anita Allen, informational privacy refers to the access of personal and genetic information, while decisional privacy refers to the lack of any interference with personal choices (Rothstein).

Informational Privacy

The legal expert Alan Westin defines informational privacy as “the claim of individuals, groups, or institutions to determine for themselves when, how, and to what extent information about themselves is communicated to others.” Informational privacy in the context of genetic testing allows consumers to control the access and dissemination of their genetic information. This includes confidentiality measures designed to limit access to such information, as well as anonymity measures designed to protect the identity of an individual or an individual’s genetic sample.

In the Privacy Statement, 23andMe outlines their measures for data protection, confidentiality, and anonymity. These measures include maintaining contact and payment information separately from genetic information, using a barcode rather than personal information to link genetic data derived from a sample to a consumer’s account, and the destruction of DNA and saliva samples after analysis.

23andMe can, according to the Terms of Service, use genetic and “voluntarily contributed information” to develop a database for future research purposes. Consumers provide voluntarily contributed information in the form of surveys and questionnaires found on the site. The company states that a consumer’s account information will never be associated with 23andWe’s research or the database.

In addition, 23andMe is allowed to form collaborative partnerships with for-profit and non-profit companies, including researchers, drug developers, and commercial biotechnology firms (“Terms of Service”). These partners have access to aggregated genetic and voluntarily-contributed data of all 23andMe consumers. Individual-level data is only provided to partners upon consent from each consumer (“Consent and Legal Agreement”).

23andMe views these anonymity measures as adequate to protect a consumer’s informational privacy. However, studies have shown that individuals can be identified from aggregated data, even in the absence of personal identifying information. Homer et. al. showed that individuals can be identified in aggregated samples of up to 1,000 (Homer). In addition, once information is shared with 23andMe partners, there is no guarantee it will be destroyed upon request.

Anita Allen also notes that practices that fall under the purview of informational privacy should also be extended to protect family members. Genetic information about an individual reveals information about his or her family members, and these family members should be able to exercise their right to know or their right to not know about genetic information that may concern them. Genetic tests, even ancestry tests, can reveal information like misattributed paternity, secret adoptions, and anonymous sperm donation. However, 23andMe does not warn its customers about the risks posed to a consumer’s family members, and does not encourage testers to speak with their relatives before using 23andMe’s social networking services.

Decisional Privacy

The Belmont Report of 1979 established the ethical principles by which scientists and researchers are held. The first principle listed in the report, respect for persons, refers to the autonomy of individuals. This principle is applied in many forms today, but most practical applications include the protection of decisional privacy and informed consent measures.

Anita Allen describes genetic decisional privacy as “the freedom to make decisions about health, reproduction, and family life autonomously, free of unwanted governmental or other third-party interference.” Individuals have a right to act as autonomous persons with adequate information to make rational decisions.

In 23andMe’s Terms of Service, Consent Waiver, and Privacy Statement, there is practically no mention of risks posed to family members with regards to decisional privacy. The only time 23andMe acknowledges risks posed to family members is in the Terms of Service, when they warn that individuals should use caution when giving out any personally identifying information about themselves or their children. 23andMe asks the purchaser and user of the test to consent to the terms of service, but does not ask any of the consumer’s family members for consent or even hint that consent might be necessary.

In addition to providing genetic testing services, 23andMe also creates and maintains a database of genotypic and phenotypic information in order to study genetic associations. To recruit participants in these studies, 23andMe must receive informed consent from the test users. In the consent form, 23andMe explicitly states that by obtaining 23andMe’s services, the consumer is also agreeing to contribute their genetic information to 23andMe’s research services, 23andWe (“Consent and Legal Agreement”).

However, there are some concerns that the informed consent of the test user is adequate. As noted in the Belmont Report, to achieve an ethical standard of informed consent, individuals must be given sufficient information to understand the risks of the study, must comprehend the risks of the study, and must voluntarily participate in the study. Recent events surrounding the Havasupai Indian lawsuit against Arizona State University have lead some to question what it means to have fully informed consent for genetic and genomic research, and whether this is achievable at all. Daniel Vorhaus, legal expert and author of the Genomics Law Report blog, writes that fully informed consent may require participants to possess a reasonable understanding of genetics and genomics, a task that “sets a very high bar.” He notes that it is particularly difficult to fully inform research participants of the costs and benefits of participating in the study when the scientific community is still uncertain of many of these risks. There is still a lot that is not known about the relationship between genetic information, ancestry, and disease phenotype. A consumer could share information because he believes it is not medically or personally significant, but he may not understand that the significance of his genetic information may change over time.

Karin Esposito and Kenneth Goodman also questioned the sufficiency of 23andMe’s consent agreement, especially with regard to the risks associated with the compilation of the genotype/phenotype database. When large databases are compiled and analyzed, researchers are able to make associations about very specific population groups, including racial and ethnic subgroups. The authors note that 23andMe does not address potential group harms that might occur, especially if associations are later discovered that were not initially understandable or possible to predict prior to the study. One can imagine a situation similar Havasupai incident: if, for example, individuals of a particular racial subgroup independently agree to participate in a study about one disease phenotype, they may not have consented to a study about the prevalence of a different, socially stigmatized disease in their racial subgroup.

These privacy issues are not addressed by the legal agreements posted on 23andMe’s sites, and should be a source of major concern for users of 23andMe’s services.

Works cited in this post
“Consent and Legal Agreement.” 23andMe. Web. 24 Apr. 2010.
Esposito, Karin, and Kenneth Goodman. “Genethics 2.0: Phenotypes, Genotypes, and the Challenge of Databases Generated by Personal Genome Testing.” American Journal of Bioethics 9.6 (2009): 19-21. Informa. Web. 5 Apr. 2010.
Homer, Nils, Szabolcs Szelinge, Margot Redman, et al. “Resolving Individuals Contributing Trace Amounts of DNA to Highly Complex Mixtures Using High-Density SNP Genotyping Microarrays.” PLoS Genetics 4.8 (2008). Web. 19 Apr. 2010.
“Privacy Statement.” 23andMe. Web. 24 Apr. 2010.
Rothstein, Mark A. Genetic Secrets: Protecting Privacy and Confidentiality in the Genetic Era. New Haven: Yale UP, 1997. Print.
“Terms of Service.” 23andMe. Web. 24 Apr. 2010.
United States. Department of Health, Education, and Welfare. The National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research. The Belmont Report. Office of Human Subjects Research. Web. 19 Apr. 2010.
Vorhaus, Daniel. “The Havasupai Indians and the Challenge of Informed Consent for Genomic Research.” Web log post. Genomics Law Report. 21 Apr. 2010. Web. 24 Apr. 2010.
Westin, Alan F. Privacy and Freedom. London: Bodley Head, 1970. Print.

April 24, 2010 at 6:36 pm 1 comment

Can we really have “recreational” genomics?

Even if you sign up for a 23andMe genetic ancestry test for “research and educational uses only,” as the company claims as their purpose in the Terms of Service, there may still be some medical implications in the information you receive.

For example, if a male receives his genotype results from his Y chromosome, and he shows a lack of the DYS464 marker, it can suggest infertility (King). Additionally, as noted in a previous post, most genetic ancestry tests genotype the mtDNA to show maternal lineage. Unfortunately, results from mtDNA genotyping can show a consumer if he or she has a mitochondrial disease, many of which are caused by mitochondrial mutations that are common in the general population (Elliot).

However, 23andMe is very clear that their tests are recreational, and only recreational. In the Terms of Service, the company states:

“The Services Content is not to be, and is not intended to be, used for any diagnostic purpose and is not a substitute for professional medical advice. The Services Content is not to be used, and is not intended to be used, by you or any other person to diagnose, cure, treat, or prevent a disease or other impairment or condition, or to ascertain your health.”

The company is also explicit when they recommend that you turn to your doctor with any and all medical questions:

“You should always seek the advice of your physician or other appropriate healthcare professional with any questions you may have regarding diagnosis, cure, treatment, mitigation, or prevention of any disease or other medical condition or impairment or the status of your health…Only a trained healthcare professional can assess your current state of health or disease.”

So despite the tantalizing notion that a consumer’s genetic ancestry test result might have some medical implications, 23andMe is very clear that no consumer should accept the 23andMe results as fact. Doctors and healthcare professionals are the only ones who can legally diagnose or treat disease. Apart from the legal statement, however, these tests seem to toe the line between recreational and medical genomics.

Works cited in this post
Elliott, Hannah R. “Pathogenic Mitochondrial DNA Mutations Are Common in the General Population.” American Journal of Human Genetics 83.2 (2008). Web. 4 Apr. 2010.
King, T E, E. Bosch, S M Adams, E J Parkin, Z H Rosser, and M A Jobling. “Inadvertent Diagnosis of Male Infertility through Genealogical DNA Testing.” Journal of Medical Genetics 42.4 (2005). Web. 4 Apr. 2010.
“Terms of Service.” 23andMe. Web. 24 Apr. 2010.

April 5, 2010 at 2:22 pm 1 comment

Why should I share my genetic information?

The social networking capabilities on 23andMe’s website offer many benefits to consumers. Among them are:

1) Consumer empowerment

Researchers noticed a shift of health and health-care models from an effort solely undertaken by trained and licensed professionals to an effort assumed by individuals to take action in their own health and wellness (Swan). A genetics-based social network like the one created by 23andMe is one step closer to this kind of a patient-driven healthcare model. Companies like 23andMe give consumers the responsibility for their own health, and they are leading us into what some experts have deemed a “consumer empowerment movement” for healthcare (Lee). 23andMe markets this benefit as a “democratization” of personal genetics and research (23andMe). Many personalized medicine companies and sites, for example the popular site Patients Like Me, also use this kind of model to drive better health (PwC Health Research Institute).

2) Benefits for population genetics research

There also a network effect for more useful databases that is the result of sharing genetic information. Population genetic research needs large databases with many samples in order to create significant associations. 23andMe, by encouraging the sharing of personal genetic information, in turn encourages wider and broader databases. Attracting genetic testing consumers through social networking infrastructures is also an easy, efficient way to scale up population-based research, and can recruit participants that are in a specific ancestry group, geographic group, or have a specific family history of disease (Lee).

3) New connections based on genetic similarity

The relationships that are created by sharing and comparing genetic information are based on a completely new foundation. Sandra Soo-Jin Lee notes that companies like 23andMe are creating “new regimes of biosociality” and reinventing identity based on personal genetic information. Social networks such as the ones offered by 23andMe can also allow users to gain emotional support and social support from other users (Swan).

As personalized medicine becomes more mainstream, I am confident that we will see more health and wellness related companies offering social networking applications as 23andMe is doing now. We are truly living in an open-access era, where everything is shared, even your genetic information.

Works cited in this post
23andMe. 23andMe Democratizes Personal Genetics. News. 9 Sept. 2008. Web. 4 Apr. 2010.
Lee, Sandra, and LaVera Crawley. “Research 2.0: Social Networking and Direct-To-Consumer (DTC) Genomics.” American Journal of Bioethics 9.6 (2009): 35-44. Informa. Web. 4 Apr. 2010.
PwC Health Research Institute. The New Science of Personalized Medicine. Publication. PricewaterhouseCoopers, 17 Dec. 2009. Web. 20 Jan. 2010.
Swan, Melanie. “Emerging Patient-Driven Health Care Models: An Examination of Health Social Networks, Consumer Personalized Medicine and Quantified Self-Tracking.” International Journal of Environmental Research and Public Health 6 (2009): 492-525. Print.

April 4, 2010 at 8:15 pm 1 comment

It’s a family reunion on the internet

Now that I’ve received my results, I’ve had time to play around with the 23andMe social network. 23andMe provides you with much more than a genetic test: the infrastructure that the company offers to connect with other users is astounding.

23andMe has provided me with a list of potential relatives that are currently on the network through the Relative Finder tool. The tool allows me to look for shared DNA segments in order to predict common ancestors and the degrees of separation between us.

By using Relative Finder, I found that I have a lot of predicted third cousins, people I share great-great grandparents with, in the 23andMe network. However, the relationship could actually be anywhere from third to tenth cousins. According to 23andMe, there are 987 users that I am at some point related to. It is actually very common for Ashkenazi Jews, as I am, to be genetically closely related despite geographical distance (Kopelman).

Another feature is the genome-sharing tool. This tool allows me to compare my genomic information with other members of 23andMe to look for a percent similarity between us. I can also compare whether I and another user share genetic information that confers to specific phenotypic traits, but since I only have the ancestry edition of the 23andMe genetic test, these traits are limited to non-medical phenotypes such bitter tasting, circadian rhythm, and endurance. Genome sharing is not limited to the users that are identified by 23andMe as my “relatives.” Linda Avey, one of the original co-founders of 23andMe, is not on my list of potential cousins, but she graciously accepted my genome-sharing request and now I can compare my genomic information to hers.

Yet another networking opportunity provided by the site is the community discussion forums.  Here, members post in groups such as maternal and paternal haplotype groups, ethnicity groups, and geographical ancestry groups. On the discussion board, users compare family histories and common last names, ancestry success stories, and even medical histories.

This model of networking around genetics and health isn’t unique to 23andMe. Many companies are emerging that offer connectivity and empowerment tools to complement their health or genetics-related products and services. Financial analysts at PricewaterhouseCoopers have also predicted that more companies like this will also emerge in the near future to capitalize on the trend of personalized medicine (PwC Health Research Institute).

Works cited in this post
Kopelman, Naama M. “Genomic Microsatellites Identify Shared Jewish Ancestry Intermediate between Middle Eastern and European Populations.” BMC Genetics 10.80 (2009). Print.
PwC Health Research Institute. The New Science of Personalized Medicine. Publication. PricewaterhouseCoopers, 17 Dec. 2009. Web. 20 Jan. 2010.

March 29, 2010 at 6:41 pm Leave a comment

And the results are in!

First, a little bit more about Phylogenetics

I spoke in the previous post about mtDNA and the estimated rate of mutation in the mitochondrial genome. Researchers have found that genetic variation in mtDNA can be grouped into distinct lineages, many of which are only found in certain parts of the world (Devor). Since mitochondria are passed only from mother to offspring, researchers have predicted the existence of a common mitochondrial ancestor, affectionately called “Mitochondrial Eve” (Devor). Extrapolating the mtDNA mutation rate, researchers have also predicted how long ago Mitochondrial Eve lived and how long ago the common lineages diverged (Cann).

The oldest haplogroups, L1, L2, and L3, originated in Africa. L3 then formed haplogroups M and N in Northeast Africa. Scientists believe that the original inhabitants of Europe and Asia had mitochondrial DNA from the M and N haplogroups and began colonizing the continents between 60,000 to 80,000 years ago. Haplogroups H, I, J, N1b, T, U,V, W, and X are descendents of haplogroup N and constitute the majority of mitochondrial haplogroups in Europe (Shriver).

My Results: Hi, I’m Haplogroup H3!

The European lineages, including haplogroup H, arrived in Europe 40,000 to 50,000 years ago, near the end of the Ice Age (Devor). According to 23andMe, the H3 haplogroup arose during the Ice Age in northern Iberia. At the end of the Ice Age, Haplogroup H3 migrated in two groups, one to present-day France and the British Isles and the other to Italy and Sardinia, and later to Hungary. Haplogroup H3 is also found throughout Western Europe due to the northward migrations after the conclusion of the Ice Age. H3 is extremely rare outside Europe (“Maternal Lineage”).

My Genetic Similarity Map

My results say that I am 67.69% Southern European, and more specifically, Italian. My results also say that I am 67.55% similar to Northern Europeans and 67.31% similar to Near Easterners. These results are not entirely unexpected, but pretty exciting nonetheless. I am obsessed with Italian food and all things Italy, and I couldn’t be happier to be ancestrally Italian.

Works Cited
Cann, Rebecca L., Mark Stoneking, and Allan C. Wilson. “Mitochondrial DNA and Human Evolution.” Nature 325 (1987): 31-35.
Devor, Eric J. Mitochondrial DNA. Publication. Integrated DNA Technologies, 2005. Web. 1 Mar. 2010.
“Maternal Lineage.” 23andMe. Web. 22 Mar. 2010.

March 23, 2010 at 5:03 pm 2 comments

So what is genetic ancestry testing, really?

Genetic ancestry testing and the encompassing field of genetic genealogy have experienced somewhat of a boom in popularity in the past ten years. According to an article by Mark Shriver and Rick Kittles, genealogical research is one of the fastest growing hobbies in America (611). The advent and growing accessibility of biotechnologies have intensified this growth in interest in one’s genetic and genealogical background. By my count, at least twenty-five firms currently sell genetic ancestry tests over the internet, and it appears that hundreds of thousands of people are buying them. Blaine Bettinger, author of the popular blog “The Genetic Genealogist,” has estimated that over half a million consumers purchased genetic ancestry testing in 2008, and he predicts that this number grows by as much as 100,000 every year (Bettinger).

Consumers purchase and use genetic genealogy tools for a myriad of reasons. Some hope to identify relatives and connect with them through an established social network. Others aim to confirm existing genealogical records with genetic information. Many consumers hope to create a connection between their ancestral homeland or ethnic group (Bolnick). My personal reason is a bit less scholarly: I’m a technophile at heart, and I think genetic testing is amazingly cool. However, I do have access to a pretty significant archive of family history and genealogical records, and I’m looking forward to seeing if the family tree matches the genetic test results.

The science behind genetic ancestry testing

There are three main categories of genetic ancestry tests. Mitochondrial DNA (mtDNA) tests sequence or genotype part of the mitochondrial genome. There is an area of the mitochondrial genome that does not contain any protein-coding sequences, allowing mutations to freely accumulate without causing deleterious harm. This area, known as the hypervariable region, allows researchers and genealogists to study neutral genetic variation (Stoneking). Additionally, the mitochondrial genome is maternally inherited, and it exists and recombines separately from the nuclear genome and (Shriver). Because only female gametes contribute mitochondria, each person only has one mitochondrial ancestor per generation. Scientists have estimated the mitochondrial mutation rate, and when coupled with the amount of genetic variation between two mitochondrial sequences, one can predict how long ago the two sequences (which, presumably, belong to two individuals) shared a common ancestor (Devor).

The second kind of genetic test sequences or genotypes the Y-chromosome. Similar to mtDNA, Y-chromosome DNA does not recombine, making it a perfect source of markers for patrilineal genealogy (Shriver). This test can, however, only be done on those who have a Y-chromosome, which means I’m out of luck. I could get the results of my patrilineal ancestry if I convinced a male relative to donate his spit to my Responsible Genomics project, but that would require another $399 ancestry test. Looks like my full genetic genealogy will have to wait until later.

The third kind of genetic test uses ancestry informative markers on the autosomal chromosomes. These population-specific markers do not focus on a single lineage, as mtDNA and Y-chromosome tests do. Rather, these autosomal markers can be used to paint a picture of one’s ancestry from many different populations.

What Technology 23andMe Uses

23andMe offers genetic ancestry tests, as well as health-related genetic tests. For this project, I used the “Ancestry Edition” for the genealogy-only services. 23andMe uses Illumina’s HumanHap 550+ BeadChip technology, an array-based chip that analyzes over 550,000 single nucleotide polymorphisms, or SNPs.

23andMe takes the results of the SNP array and compares it to their reference database of haplotypes that have been identified in specific populations. 23andMe’s reference database is based on the Human Genome Diversity Panel and Illumina’s iControlDB database (Macpherson).

Now that I know more about what I’m really getting with my genetic ancestry test, I’m even more excited to receive my results! Let the waiting game begin!

Works cited in this post
Bettinger, Blaine. The Genetic Genealogist. 2008. Web. 12 Apr. 2010.
Bolnick, Deborah, Duana Fullwiley, and Troy Duster, et al. “The Science and Business of Genetic Ancestry Testing.” Science 318 (2007): 399-400. Print.
Devor, Eric J. Mitochondrial DNA. Publication. Integrated DNA Technologies, 2005. Web. 1 Mar. 2010.
Macpherson, Mike, Werner, Greg, Mirza, Iram, et al. Global Similarity’s Genetic Similarity Map. White Paper 24-03. 23andMe.
Shriver, Mark D., and Rick A. Kittles. “Genetic Ancestry and the Search for Personalized Genetic Histories.” Nature Reviews Genetics 5 (2005): 611-18. Print.
Stoneking, Mark. Hypervariable Sites in the mtDNA Control Region Are Mutational Hotspots. The American Journal of Human Genetics, Volume 67, Issue 4, Pages 1029-1032

March 16, 2010 at 6:37 pm Leave a comment

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