Intellectual disabilities caused by protein defect. Intellectual disabilities are often caused by a mutation that damages a gene, preventing the associated protein from functioning properly. However, a mutation can also change the function of a gene. As a result, the gene in question acts in a completely different way. Researchers discovered this mechanism in fifteen genes playing a role in the development of intellectual disabilities. Their research results show that these changes in function play a more prominent role than previously thought. Source 2k.
If they can find the cause of the mutation or change it then it can mean the end of many learning disabilities leading to a better life for those with this challenge.