[Autism, epilepsy and tuberous sclerosis complex: a functional model linked to mTOR pathway]

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Tuberous sclerosis complex (TSC) is an autosomal dominant disorder caused by mutations in TSC1 or TSC2 genes.
• It leads to hamartoma formation and significant neurological issues, including infantile spasms, epilepsy, and autism.
• The TSC1/TSC2 proteins regulate the mTOR signaling pathway, crucial for cell growth and proliferation.

Purpose of the Study:

• To review the etiopathogenic mechanisms of autism and epilepsy in TSC.
• To examine the natural course of these associated conditions.
• To explore potential therapeutic strategies targeting the mTOR pathway.

Main Methods:

• Review of clinical and neuroimaging findings in TSC patients with early-onset epilepsy and autism.
• Analysis of the molecular understanding of the mTOR signaling pathway's role in neuronal function.
• Examination of the link between cortical tuber localization and autism.

Main Results:

• Clinical and neuroimaging findings suggest a multimodal origin for autism in TSC.
• The mTOR pathway is implicated not only in cell growth but also in synaptogenesis and neuronal function.
• Dysregulation of the mTOR pathway is a key factor in the co-occurrence of autism and epilepsy in TSC.

Conclusions:

• Understanding the pathogenetic mechanisms of autism in TSC is crucial for developing targeted treatments.
• Antagonism of the mTOR pathway with drugs like rapamycin and everolimus shows promise.
• These mTOR inhibitors may offer new therapeutic options for individuals with TSC and associated autism.