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Genes reveal clues about people’s potential life expectancy

January 27, 2019 dna 0
Scientists say they can predict whether a person can expect to live longer or die sooner than average, by looking at their DNA. Experts have analyzed the combined effect of genetic variations that influence lifespan to produce a scoring system. People who score in the top ten per cent of the population might expect to live up to five years longer than those who score in the lowest ten per cent, they say.
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Why haven’t cancer cells undergone genetic meltdowns?

January 27, 2019 dna 0
Cancer first develops as a single cell going rogue, with mutations that trigger aggressive growth at all costs to the health of the organism. But if cancer cells were accumulating harmful mutations faster than they could be purged, wouldn’t the population eventually die out? To get at the heart of the matter, a team of scientists wanted to get a new hint at cancer vulnerability from a mutational perspective by probing the most famous cultured cancer cells, HeLa cells.