Author: EmilyC


April 20, 2012

DNA Day: Educate and Celebrate

KhanAcademy

  We at 23andMe have a special place in our hearts for today, National DNA Day. There are many ways to celebrate this special science holiday, ranging from making DNA-themed bracelets to constructing helical origami, but we think one of the best ways is to learn something new about DNA and, in the [...]

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April 12, 2012

Gene Fusions Point to a New Type of Sarcoma

atcg-300x199

The term “sarcoma” encompasses over a hundred forms of rare cancers, and the cause behind many of these forms is unknown. Ewing sarcoma, however, is one sarcoma for which the biology is relatively well understood.  This form is caused by a gene fusion -- a DNA rearrangement resulting in two genes being [...]

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March 23, 2012

How Did the Shar-Pei Get His Wrinkly Skin?

Figure 1 of Hitte and Webster’s 2011 PLoS Genetics paper clusters 509 dogs based on their genetic similarity. In this figure, dogs that are genetically similar to each other are grouped together, and, not surprisingly, this grouping corresponds quite well with breed (dogs of the same breed are grouped together). Some breeds do cluster together (for instance, all the retrievers are clustered together, as are the all the spaniels), but the relatively long branches connecting dogs within the same breed and the relatively short branches connecting the different breeds together is consistent with breeds which originated from a common dog gene pool long ago and have remained quite distinct. Note that the longer branches in the Boxer breed are due to the fact that the boxer genome sequence was used as a reference for selecting SNPs, rather than a reflection of true genetic distance.  Image from Vaysse A, et al. PLoS Genet. (2011) vol. 7 iss. 10 pp. e1002316.

March 23rd is National Puppy Day! How did the Shar-Pei get his wrinkly skin? The question sounds like the beginning of one of Kipling’s “Just So” stories, but this and other questions were the subject of a recent genetics study. What gives some breeds their Lilliputian legs and others their lengthy [...]

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March 14, 2012

SNPWatch: A First For Ewing Sarcoma

sarcoma image

Ewing sarcoma, a rare type of bone cancer, is diagnosed in only about 250 children and teenagers in the United States each year. The vast majority of Ewing sarcomas are caused by a specific rearrangement of the DNA within bone cells – the EWSR1 gene on chromosome 22 becomes fused to the FLI1 gene on [...]

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February 24, 2012

Hope in a Pill: New Treatment for Cystic Fibrosis Approved

lungxray(n:a)

The realization of a long-awaited hope arrived this past month for many families in the form of a new treatment for cystic fibrosis. Cystic fibrosis (CF) is one of the most common recessively inherited diseases, affecting about 30,000 people in the United States. There are at least 500 mutations in a gene [...]

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February 9, 2012

What Does Your Doctor Know About Genetic Testing For Drug Response?

doctorandpatient(blog)

Your doctor, undoubtedly, knows quite a lot.  She went through four grueling years of medical school, passed a rigorous set of board exams, and completed at least one intensive residency in her speciality.   What may surprise you, however, is that she may not know very much about pharmacogenetics, the [...]

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February 6, 2012

SNPWatch: Genetic Variants Linked to Male Infertility in Asians

new born baby

Many couples who would like to start a family have difficulty doing so.  This disappointing and frustrating situation is more common than many people realize, affecting approximately one couple out of six worldwide. Given that female infertility issues receive so much attention, it may surprise some to learn [...]

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January 30, 2012

The Debate Over Clopidogrel Continues

heartman

In December a new study created quite a stir in the already-volatile clopidogrel research community. Clopidogrel (trade names Plavix®) is a commonly prescribed anti-clotting drug. It is inactive in the body until a protein encoded by the gene CYP2C19 converts the drug to its active form. Some people are able [...]

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December 1, 2011

Father Knows Best

MomDad

My parents aren’t world-class athletes, but in the summer of 2009 they both competed in the Senior Olympics. They were representing their home state of Wyoming, where people — much less senior athletes — are few and far between. It was at the Senior Olympics that my parents first encountered 23andMe. [...]

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November 18, 2011

This is Your Brain on Retrotransposons

nerves(iStock)

From your toenails to your hair follicles, every cell in your body contains genetic information. Furthermore, each cell (except sperm and egg cells) contains the same genetic information as every other cell in your body. This all-cells-are-created-equal premise, however, is an oversimplification of reality. [...]

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