Researchers show that the global epidemic of Clostridium difficile 027/NAP1/BI in the early to mid-2000s was caused by the spread of two different but highly related strains of the bacterium rather than one as was previously ...
Dec 9, 2012
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A pair of studies published by Cell Press on February 14th in the journal Cell sheds new light on genetic variation that may have played a key role in human evolution. The study researchers used an animal model to study a ...
Feb 14, 2013
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One-letter switches in the DNA code occur much more frequently in human genomes than anticipated, but are often only found in one or a few individuals.
May 17, 2012
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Tumors are heterogeneous, which means that different parts of the same tumor can be genetically distinct. This phenomenon, known as intratumor heterogeneity, is steadily gaining in significance within the field of cancer ...
Dec 10, 2021
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When it comes to the sort of beneficial mutations that drive natural selection, there's new evidence that, evolutionarily speaking, timing is everything.
Mar 20, 2013
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A tumor is often made up of different cells, some of which have changed—or evolved—over time and gained the ability to grow faster, survive longer and potentially avoid treatment. These cells, which have an "evolutionary ...
Feb 7, 2020
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(Medical Xpress) -- Understanding the genetic diversity within and between populations has important implications for studies of human disease and evolution. This includes identifying associations between genetic variants ...
May 24, 2012
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(Medical Xpress) -- Thanks to the sequencing of the 27 known human interferon genes, researchers from the Institut Pasteur and the CNRS reconstruct the genetic history of these proteins so central for our immune system, and ...
Dec 20, 2011
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(Medical Xpress)—Natural killer cells – a vital part of the immune system – have a dual role in protecting against infection and ensuring reproduction. Scientists suggest that the multi-tasking ability of these cells ...
Feb 8, 2013
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In 1998, scientists published the first complete genome of a multicellular organism—the worm Caenorhabditis elegans. At the same time, new technologies were emerging to help researchers manipulate genes and learn more about ...
Aug 13, 2013
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