Georgia Wiesner, MD CREC June 20, 2007. GATACAATGCATCATATG TATCAGATGCAATATATC ATTGTATCATGTATCATG TATCATGTATCATGTATC ATGTATCATGTCTCCAGA TGCTATGGATCTTATGTA.

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Georgia Wiesner, MD CREC June 20, 2007

GATACAATGCATCATATG TATCAGATGCAATATATC ATTGTATCATGTATCATG TATCATGTATCATGTATC ATGTATCATGTCTCCAGA TGCTATGGATCTTATGTA TCATGTATCATGTATCAT GTATGATGTATC

Genetic Variation l Chromosomal l Duplications/Deletions l Sequence variation l Single mutation in gene l SNP Single Nucleotide Polymorphism

Linkage analysis Graphics from NCI Understanding Gene Testing

Why SNPs in Mapping? Numerous Stable Easy to score In genes (sometimes)

GATACAATGCATCATA GATGCAATGTATCATA GATGCTATGCATCATA

Human SNPs 2 chromosomes differ ~1/1,000 bases More chromosomes more sites Potential for 30 million variable sites Expanded type of study design for genetic studies

Colon Cancer Unaffected SNP A SNP B

SNP Genotyping Tools 330, ,000 SNPs per array Affymetrix Illumina Courtesy, S. Gabriel NHGRI

Increase in Genetic Information High throughput technologies have increased ability to generate genotypes Lead to increase in “collections” of data: –Independent lab studies –Consortium studies: HapMap –“Open source” –Forensic Even small studies can hold large datasets –CNSS study generated 1.8M genotypes

Sources of Genetic Information Not only nuclear DNA! –RNA –Protein –Mitochondrial Many tissues- all cell types –Blood –Skin –Paraffin samples after surgery Family History

Genetic Information- who cares? Permanent Personal Powerful (Potentially) Predictive

Genetic Information Permanent –DNA is stable and easily stored –Database genetic information –Confidential Personal Powerful (Potentially) Predictive

Genetic Information Permanent Personal –Individual Information –Family Information Powerful (Potentially) Predictive

Genetic Information Permanent Personal Powerful –Genetic code of life –Linkage to health and disease –Links an individual to family Paternity/Maternity –Forensic (Potentially) Predictive

Genetic Information Permanent Personal Powerful (Potentially) Predictive –Susceptibility markers disease –Diagnostic tests

ELSI: Ethical, Legal, and Social Issues Privacy and confidentiality of genetic information. Fairness in the use of genetic information by insurers, employers, courts, schools, adoption agencies, and the military, among others. Psychological impact, stigmatization, and discrimination due to an individual’s genetic differences. Reproductive issues including adequate and informed consent and use of genetic information in reproductive decision making. Clinical issues including the education of doctors and other health-service providers, people identified with genetic conditions, and the general public about capabilities, limitations, and social risks; and implementation of standards and quality ‑ control measures. U.S. Department of Energy Genome Programs, Genomics and Its Impact on Science and Society, 2003

ELSI Issues (cont.) Uncertainties associated with gene tests for susceptibilities and complex conditions (e.g., heart disease, diabetes, and Alzheimer’s disease). Fairness in access to advanced genomic technologies. Conceptual and philosophical implications regarding human responsibility, free will vs genetic determinism, and concepts of health and disease. Health and environmental issues concerning genetically modified (GM) foods and microbes. Commercialization of products including property rights (patents, copyrights, and trade secrets) and accessibility of data and materials. U.S. Department of Energy Genome Programs, Genomics and Its Impact on Science and Society, 2003

Individual Family Society