6/9/2014 7:24:37 AM
New genomic research led by UC San Francisco scientists reveals that two common gene variants that lead to longer telomeres, the caps on chromosome ends thought by many scientists to confer health by protecting cells from aging, also significantly increase the risk of developing the deadly brain cancers known as gliomas. The genetic variants, in two telomere-related genes known as TERT and TERC, are respectively carried by 51 percent and 72 percent of the general population. Because it is somewhat unusual for such risk-conferring variants to be carried by a majority of people, the researchers propose that in these carriers the overall cellular robustness afforded by longer telomeres trumps the increased risk of high-grade gliomas, which are invariably fatal but relatively rare cancers.
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