Brain Genes Hint at Why Zika Doesn’t Always Cause Microcephaly

February 2, 2018

(New Scientist) – Just one in 10 babies exposed to the Zika virus during pregnancy get the brain damage that causes microcephaly – abnormally small heads. Now there’s a first clue about what stops this from happening in the rest – their gene activity.Blood samples were taken from three pairs of non-identical twins in Brazil. In each of these pairs, one baby had brain damage and the other didn’t. Stem cells were then made from their blood cells, and matured into brain cells, allowing researchers to see how the brain cells naturally differ between the twins.

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