Posttraumatic stress disorder (PTSD) is a condition caused by severe stress and subsequent chronic distress, which is generally associated with a life-threatening experience, such as a natural disaster, military combat, traffic accidents, incurable disease or a personal tragedy. PTSD may result in neuropsychological, cardiovascular, gastrointestinal, metabolic, endocrine, and even oncological diseases. Current pharmacological treatment for PTSD is not adequately effective and may cause serious side effects. The research projects will be aimed on PTSD development (on a rat models of the disease) and on the evaluation of its pathophysiology. We are looking for collaborators, who can conduct PCR, mRNA and microbiota evaluation.