The Structure of Temperament in Caregivers of Patients with Schizophrenia.

The onset of schizophrenia symptoms usually occurs in early youth. As a result, the parents of these patients usually become their caregivers. The role of a caregiver for a person with schizophrenia is a considerable mental and physical burden. Therefore, an interesting issue is what motivates these people to take up this challenge. It is probable that, apart from the moral imperative or kinship, the factor determining this decision is the personality structure of the caregiver. The aim of our study was to compare the structure of temperament (according to the model of temperament as formal characteristics of behavior developed by Jan Strelau) in caregivers of young adults (age 18-25 years) with schizophrenia with the structure of temperament of parents of healthy young adults still living in the family home under their care. The study group consisted of 64 people (51 women), who were taking care of young adults (aged 18-25 years) with schizophrenia, while the control group (53 people, 42 women) consisted of parents of healthy adults still living in the family home. Both groups were asked to complete a questionnaire of the authors' own design on their demographic data as well as The Formal Characteristics of Behavior-Temperament Inventory to assess the temperament traits. The results were given in the number of points obtained on average in each dimension. Both groups did not differ in terms of size and age, with women predominating. Caregivers of young adults with schizophrenia had higher values of briskness (43.22 ± 4.45 vs. 42.90 ± 3.98, p = 0.032), emotional reactivity (46.02 ± 4.39 vs. 41.01 ± 3.12, p = 0.012) and activity level (44.01.89 ± 4.15 vs. 37.59 ± 4.77, p = 0.022) compared to the control group. The remaining dimensions of temperament: perseverance, sensory sensitivity, rhythmicity, and endurance did not differentiate between the two groups. The temperament structure of caregivers of young people with schizophrenia differs from the temperament structure of caregivers of healthy adults. Caregivers of sick people have higher values of briskness, emotional reactivity, and activity level compared to the control group.

SARS-CoV-2 Spike Protein and Neutralizing Anti-Spike Protein Antibodies Modulate Blood Platelet Function.

Several studies report elevated blood platelet activation and altered platelet count in COVID-19 patients, but the role of the SARS-CoV-2 spike protein in this process remains intriguing. Additionally, there is no data that anti-SARS-CoV-2 neutralizing antibodies (nAb) may attenuate spike protein activity toward blood platelets. Our results indicate that under in vitro conditions, the spike protein increased the collagen-stimulated aggregation of isolated platelets and induced the binding of vWF to platelets in ristocetin-treated blood. The spike protein also significantly reduced collagen- or ADP-induced aggregation or decreased GPIIbIIIa (fibrinogen receptor) activation in whole blood, depending on the presence of the anti-spike protein nAb. Our findings suggest that studies on platelet activation/reactivity in COVID-19 patients or in donors vaccinated with anti-SARS-CoV-2 and/or previously-infected COVID-19 should be supported by measurements of spike protein and IgG anti-spike protein antibody concentrations in blood.