Why Do Different Mutations Lead to Autism? Scientists Identify a Common Mechanism

The scientists studied a number of autism-associated genes using a human cell model. They found that disruptions in different genes lead to similar changes in the activity of many other genes. This may explain why mutations in hundreds of different genes can result in similar developmental characteristics.

The researchers also investigated possible reasons why autism is diagnosed approximately four to five times more often in males than in females. They focused on the ZFX gene, which is located on the X chromosome.

Females typically have two X chromosomes, while males have only one. In most female cells, one of the two X chromosomes is largely inactivated. However, some genes escape this process. ZFX is one of them, meaning that its activity may be higher in females.

The scientists found that ZFX regulates the activity of many genes associated with autism. They suggest that increased activity of this gene may partially protect females against the effects of mutations linked to autism spectrum disorder.

The discovery could also help pave the way for new treatment approaches. Rather than targeting each mutation individually, scientists hope to learn how to regulate shared genetic mechanisms. In particular, they are exploring the possibility of modifying ZFX activity.

However, this line of research requires further investigation. The study does not prove that ZFX directly protects against autism, nor does it offer a ready-made method for preventing or treating the condition.