An experimental drug tamps down the expression of a gene duplicated in an autism-related condition and restores typical behavior in mice.

A single dose of cannabidiol, a component of marijuana, eases seizures and improves learning and sociability in mice with mutations in an autism gene called CDKL5.

A single seizure early in life leads to enduring behavioral problems, including diminished sociability, in mice.

An experimental leukemia drug and a chemical in black pepper ease breathing and movement problems in a mouse model of Rett syndrome.

A drug that treats tumors and epilepsy in people with tuberous sclerosis complex does not boost their intelligence or ease autism traits.

Mice with extra copies of UBE3A, a gene linked to autism and related conditions, are susceptible to death from seizures.

Families of children with mutations in a gene called SYNGAP1 have spurred research into the effects of the mutations on people — and how to treat them.

The ratio of autistic boys to girls is roughly the same among children with epilepsy, according to a new meta-analysis.