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Genetics: Genetic Testing
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Iceland's DeCode Genetics has launched a closely watched Phase III trial of DG031 to prevent heart attacks. The company will track the results of 3,400 African-American subjects who have a genetic variant linked to heart attacks. Report
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Nutrition and genetics interact extensively. Individuals with similar elevated levels of cholesterol have a variety of underlying conditions for which different dietary and pharmacologic approaches are needed. Another important risk factor for coronary heart disease is the amino acid homocysteine, whose level is greatly influenced by folic acids and vitamins B12 and B6, as well as genetic variation in enzymes metabolizing these vitamins. One common disorder, hereditary hemochromatosis, results from an overload of iron from the diet, leading to damage from iron deposition in the heart, liver, pancreas (diabetes), testes (infertility), skin, and joints (arthritis). Simple blood donation can reduce iron burdens in the body and prevent these serious complications. It is easy to test for elevated iron levels and for the gene mutations that predispose to the retention of excess iron.
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Organisms were chosen, in part, for convenience — short generation times and facile genetic manipulation made some organisms popular genetics research tools. Widely used model organisms include the gut bacterium Escherichia coli, the plant Arabidopsis thaliana, baker's yeast (Saccharomyces cerevisiae), the nematode Caenorhabditis elegans, the common fruit fly (Drosophila melanogaster), and the common house mouse (Mus musculus).
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The most common models to study the role of genetics in the development of fitness are listed in Table 1. Of these models, the most informative approach is to compare the differences in fitness components between twins to differences between other individuals. Furthermore, a comparison between identical twins (from one egg, or monozygous) to non-identical twins (from different eggs, or dizygous) better separates inherited genetic traits from the influences of the environment (which includes training).
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"We appreciate the confidence this transaction shows in Interleukin's business plan and our path forward," stated Thomas Curran, interim Chief Executive Officer of Interleukin Genetics. "This is another important commitment for Interleukin as we continue to leverage our science and capabilities building our twenty year history of leadership in the genetic testing and personalized healthcare sectors."
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Genetic professionals can be your partner in ensuring that your patients benefit from advances in genetics. Visit this module for referral information and tools to locate a genetic service provider in your area.
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