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The genetic key to conquering cholera
Date:7/19/2013

Researchers have long understood that genetics can play a role in how susceptible people are to contracting cholera, but a team of Harvard scientists is now uncovering evidence of genetic changes that might also help protect some people from contracting the deadly disease.

Based on genetic data gathered from hundreds of people in Bangladesh, a research team made up of Harvard faculty and scientists from the Broad Institute and Massachusetts General Hospital were able to a number of areas in the genome some of which are responsible for certain immune system functions, while others are related to fluid loss that appear to be related to cholera resistance. Later tests showed genetic differences between people who had contracted the disease and those who had been exposed, but did not become ill. Their results are described in a paper published earlier this month in Science Translational Medicine.

"This study is exceptionally exciting for us because it shows the power of this approach," said Associate Professor of Organismic and Evolutionary Biology Pardis Sabeti, one of two senior co-authors of the paper. "This is the first time we've taken a genomic-wide approach to understanding cholera resistance. But it's a first step, and there is a lot of exploration to go from here. For a disease that's so ancient and widespread there's very little that's known about host immunity."

The hope, Sabeti added, is that by better understanding why some people appear to be immune, it will help in our efforts to develop vaccines and therapies, so outbreaks like those that occurred in recent years in Haiti and Africa might one-day be avoided.

"It is a very scary disease," she said. "We now have treatments with oral rehydration therapy, but it is still devastating, and in extreme cases, cholera can kill in hours."

"We also haven't been able to develop a particularly effective vaccine," added Elinor Karlsson, a Post-Doctoral Fe
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Contact: Peter Reuell
preuell@fas.harvard.edu
617-496-8070
Harvard University
Source:Eurekalert

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