[Effect of stress on prepulse inhibition: a systematic review]

Prepulse inhibition, one of the main indices of the autonomous inhibitory capacity of the central nervous system, is deficient in psychiatric pathologies associated with dopaminergic system alterations, such as schizophrenia, post-traumatic stress disorder, or substance use disorder. Stress is one of the main risk factors related to the development of these psychiatric disorders.

To know the relationship between stress and prepulse inhibition as possible biomarker and predictor of related pathologies, based on recent literature.

A systematic review was carried out in PubMed and Web of Science databases from 2011 to 2020.

The studies reviewed, including both animal model studies and clinical articles, have shown that intense or repeated stress, whether social, physical or drug-induced, leads to a deterioration of prepulse inhibition, while moderate stress seems to improve its levels.

The results demonstrate a clear relationship between stress and a deficit in prepulse inhibition, which occurs mainly through the dopaminergic system and the corticotropin-releasing factor in the extended amygdala. Prepulse inhibition levels reflect the state of brain dopaminergic activity, being able to identify the most vulnerable subjects to develop stress-related psychiatric pathologies.