Girls and women with Rett have a mutation in only one of their two copies of the MECP2 gene. Like all females, one of the two MECP2 copies is randomly inactivated. The mutated gene is active and making defective protein in approximately half of all cells in the body, while the healthy copy of the MECP2 gene in those cells is silenced. Reactivate the silent copy and theoretically Rett is cured.
There is a healthy copy of MECP2 in every cell, we don’t have to deliver it, it’s already there, we just have to find a way to wake it up.


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