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Another early-onset Alzheimer’s gene mutation found, and traced back to Africa

February 23, 2019 dna 0
For some of us, they carry the bright blue of our grandfather’s eyes. For others they result in the characteristic cleft chin or the familial tendency toward color blindness. But in some families, the genetic mutations handed down from generation to generation aren’t as benign. And for one family in particular, the mutation results in early-onset Alzheimer’s disease.
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New ‘interspecies communication’ strategy between gut bacteria and mammalian hosts uncovered

February 23, 2019 dna 0
Bacteria in the gut do far more than help digest food in the stomachs of their hosts; they can also tell the genes in their mammalian hosts what to do. A study describes a form of ‘interspecies communication’ in which bacteria secrete a specific molecule — nitric oxide — that allows them to communicate with and control their hosts’ DNA, and suggests that the conversation between the two may broadly influence human health.