[Clinical and immunological correlates in endogenous psychoses developed after COVID-19]

The clinical and immunological study of the potential impact of coronavirus infection on the course of endogenous psychosis.

Thirty-three female patients, aged 16 to 48 years, with depressive-delusional conditions (ICD-10 F20.01, F21, F31) developed after coronavirus infection, of whom 15 people (group 1) had depressive-delusional states 1-2 months after COVID-19 and 18 people (group 2), who developed similar psychoses in later periods (2-6 months). The severity of the psychopathologic symptoms was evaluated with PANSS and HDRS-21 scales. The activity of inflammatory markers - leukocyte elastase (LE) and α1-proteinase inhibitor (α1-PI) in the blood was determined. The absolute neutrophil count, the absolute lymphocyte count and the neutrophil/lymphocyte ratio were calculated. As a control, we used standard values of indicators of age - and sex-matched healthy donors.

The endogenous psychosis that developed later after a coronavirus infection (group 2) is associated with a "typical" inflammatory reaction with an increase in the activity of acute phase proteins (according to α1-PI) and degranulation activity of neutrophils (according to LE), which is associated with the development of depressive-delusional states in patients with the dominance of manifestations of positive affectivity (anxiety, melancholy) and the extended nature of delusional disorders, which were predominantly incongruent to affect. On the contrary, the development of endogenous psychosis during the first two months after COVID-19 (group 1) is characterized by a spectrum of inflammatory biomarkers with a decrease in the number of neutrophils and low activity of LE. This immunological profile is associated with the predominance of manifestations of negative affectivity (apathy, asthenia, adynamia) in the structure of depressive-delusional states and the relatively undeveloped nature of delusional disorders, which were predominantly congruent to affect.

The clinical and biological correlates presumably indicate the modulating effect of the coronavirus infection (COVID-19) on neuroinflammation and the structure of endogenous psychosis.