Warren symposium follows legacy of geneticist giant

If we want to understand how the brain creates memories, and how genetic disorders distort the brain’s machinery, then the fragile X gene is an ideal place to start. That’s why the Stephen T. Warren Memorial Symposium, taking place November 28-29 at Emory, will be a significant event for those interested in neuroscience and genetics. Stephen T. Warren, 1953-2021 Warren, the founding chair of Emory’s Department of Human Genetics, led an international team that discovered Read more

Mutations in V-ATPase proton pump implicated in epilepsy syndrome

Why and how disrupting V-ATPase function leads to epilepsy, researchers are just starting to figure Read more

Tracing the start of COVID-19 in GA

At a time when COVID-19 appears to be receding in much of Georgia, it’s worth revisiting the start of the pandemic in early 2020. Emory virologist Anne Piantadosi and colleagues have a paper in Viral Evolution on the earliest SARS-CoV-2 genetic sequences detected in Georgia. Analyzing relationships between those virus sequences and samples from other states and countries can give us an idea about where the first COVID-19 infections in Georgia came from. We can draw Read more
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myopathy

Rare inherited musculoskeletal disorder illustrates broader themes

More than fifteen years ago, Emory geneticist William Wilcox was a visiting professor in Montevideo, Uruguay. There he worked with local doctors, led by Roberto Quadrelli, to study a family whose male members appeared to have an X-linked inherited disorder involving heart disease and musculoskeletal deformities.

In March 2016, Wilcox and his colleagues reported in Circulation: Cardiovascular Genetics that they had identified the genetic mutation responsible for the disorder, called “Uruguay syndrome.” His former postdoc Yuan Xue, now a lab director at Fulgent Diagnostics and a course instructor in Emory’s genetics counseling program, was the lead author.

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William Wilcox, MD, PhD

“It took many years and advances in technology to move the molecular definition from localization on the X chromosome to a specific mutation,” Wilcox says.

Still, with current DNA sequencing technology, this kind of investigation and genetic discovery takes place all the time. Why focus on this particular paper or family?

*This gene is a big tent — Mutations in FHL1, the gene that is mutated in the Uruguayan family, are responsible for several types of inherited muscle disorders, which differ depending on the precise mutation. In 2013, an international workshop summarized current knowledge on this family of diseases.

Some forms of FHL1 mutation are more severe, such as reducing body myopathy, which can have early childhood onset leading to respiratory failure. Other forms are less severe. While some men in the Uruguayan family died early from heart disease, the man who Wilcox helped treat is now teaching high school and his hypertrophic cardiomyopathy is stable on a beta blocker.

“Studying a sample of his muscle proved that we had the right gene and some of what the mutation does,” Wilcox says.

*Studying rare mutations can lead to blockbuster drugs – The discovery of potent yet expensive cholesterol-lowering PCSK9 inhibitors, which grew out of the study of familial hypercholesterolemia, is a prominent example.

FHL1 regulates muscle growth by interacting with several other proteins. Probing its function may yield insights with implications for the treatment of muscular dystrophies and possibly for athletes. As NPR’s Jon Hamilton explains, the development of myostatin inhibitors, intended to help people with muscle-wasting diseases, has led to concern about them becoming the next generation of performance-enhancing drugs. Read more

Posted on March 25, 2016 by Quinn Eastman in Heart Leave a comment