Scientists have thrown light on a question on why autism cases are much more often observed at boys. To blame for it it is necessary the changed gene in man's X to a chromosome.

The international group of scientists under the guidance of doctor John Vincent from the Center of dependences and mental health in Toronto has studied specific genes at three thousand the people suffering from an autism, and 246 more, having various intellectual deviations. Then the obtained data have compared to the information on genes more than 10 000 persons from control group.

Results of research are published in magazine Science Translational Medicine. It is informed, that mutations of gene PTCHD1 are bound to hereditary forms of an autism and intellectual disorders at approximately 1 % of people from the first to group. In the second control group of this communication it was revealed not.

"Our research allows to assume, that mutations of site PTCHD1 are substantially bound to an autism", - researchers have come to conclusion. They also have noticed, that this gene, as a rule, is located in individual X to a chromosome at men.

These data give one more to explanation to that fact, that among boys quantity suffering from an autism four times above, than among girls. Gene PTCHD1 represents neurobiological trajectory which defines development of a human embryos.
Scientists notice, that though that of 1 % of people in which organisms communication of a gene with an autism has been found out, and it is impossible to name appreciable number, however it only one more acknowledgement of one of hypotheses of a parentage of mysterious disorder.