MECP2 Mutation Delays Puberty and Alters Hormones in Rett Syndrome Mice

A collaborative research team comprising scientists from the Department of Cell Biology and Functional Biology at the University of Valencia (UV), the Predepartmental Unit of Medicine at the University Jaume I of Castelló (UJI), and Queen Mary University of London (QMUL) has discovered that a mutation in the Mecp2 gene disrupts the hypothalamic‑pituitary‑gonadal (HPG) axis in a mouse model of Rett syndrome. The HPG axis regulates the production of sexual hormones, and its impairment was linked to delayed onset of puberty in the animals studied.

The study employed a genetically engineered mouse carrying the Mecp2 mutation, the same gene implicated in human Rett syndrome. Researchers observed altered signaling within the HPG axis, evidenced by reduced gonadotropin secretion and lower circulating sex hormone levels. These hormonal changes corresponded with a measurable delay in the typical developmental milestones of puberty in the mice, suggesting that Mecp2 dysfunction can affect reproductive maturation.

These findings provide new insight into the broader systemic effects of Rett syndrome beyond the neurological symptoms traditionally associated with the disorder. By highlighting the role of Mecp2 in endocrine regulation, the study opens avenues for further research into therapeutic strategies that address both neurological and reproductive complications in affected individuals.