Updated project metadata. We measured the proteome of wild type and Mecp2 KO rat cerebral cortex, hippocampus and cerebrospinal fluid of animals aged 25 days postnatal age. We measured the proteome of human cerebrospinal fluid from Rett syndrome patients before and after treatment with recombinant IGF-1. We measured the proteome of wild type and Mecp2 KO as well as disease associated Mecp2 point mutations in LUHMEs dopaminergic postmitotic neurons. Project details can be found in doi: https://doi.org/10.1101/2021.11.30.470580