MentalHealthDaily

Spanish Rett Syndrome Behavior Questionnaire: ICC 0.907

by GLOOM

MHD featured image for Spanish Rett Syndrome Behavior Questionnaire validation.

A 2026 Spanish Rett Syndrome Behavior Questionnaire validation preprint found strong test-retest reliability across 51 caregivers, including an intraclass correlation coefficient of 0.907 and a 31-person short-interval subset with Pearson r2 = 0.8663.1 The result supports Spanish-language research access, but it is linguistic validation rather than proof that the scale diagnoses Rett syndrome or measures …

MeCP2 Overexpression Hit 5,000 Progenitor Genes but Spared Neurons

by GLOOM

Photoreal illustration of two neural cell types displaying differential response to MeCP2 dosage, conveying cell-type-specific vulnerability.

A 2026 Nature Communications study found that Mecp2 overexpression deregulated approximately 5,000 genes in mouse neural progenitor cells but only approximately 500 mostly small-change genes in mature neurons, with the same progenitor-vs-neuron split reproduced in human iPSC-derived cells.1 For Rett syndrome gene therapy, that is the useful calibration: extra MeCP2 is most dangerous when it …