The extraordinary situation of the 2019–2022 pandemic caused
a dramatic jump in the incidence of post-traumatic stress disorder
(PTSD). PTSD is currently regarded not only as a neuropsychiatric
disorder, but also as a comorbidity accompanied by cardiovascular
diseases, circulatory disorders, liver dysfunction, etc. The relationship
between behavioral disorders and the degree of morphofunctional
changes in the liver remains obscure. In this study, PTSD was modeled in
sexually mature male Wistar rats using predatory stress induced
by a prey’s fear for a predator. Testing in an elevated plus maze
allowed the rat population to be divided into animals with low-anxiety
(LAP) and high-anxiety (HAP) phenotypes. It was found that morphofunctional
analysis of the liver, in contrast to its biochemical profiling,
provides a clearer evidence that predatory stress induces liver
dysfunction in rats of both phenotypes. This may indicate a decrease
in the range of compensatory adaptive reactions in stressed animals.
However, in HAP rats, the level of morphofunctional abnormalities
in the mechanisms responsible for carbohydrate-fat, water-electrolyte
and protein metabolism in the liver testified the prenosological
state of the organ, while further functional loading and resulting
tension of the regulatory systems could lead to homeostatic downregulation.
Meanwhile, the liver of LAP animals was only characterized by insignificant diffuse
changes. Thus, we demonstrate here a link between behavioral changes
and the degree of morphofunctional transformation of the liver.