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Sticky platelet syndrome (SPS) is a disorder with familial occurrence and autosomal dominant trait characterized by platelet hyperaggregability in response to a low concentration of adenosine diphosphate (ADP) and/or epinephrine (EPI). The etiology of SPS may be associated with platelet microRNAs (miRNAs), which are considered as potential biomarkers of platelet function and antiplatelet therapy. We were monitoring the expression of platelet miRNAs in patients with laboratory diagnosed SPS and healthy controls. We have found a statistically significant increased expression of both miR-423-5p and miR-338-3p as well as a statistically significant decreased expression of miR-425-5p between the group of patients with diagnosed SPS type II and the group of healthy controls, which seems to be an interesting issue for a further research.

A positive association between anemia and all-cause mortality and cardiovascular mortality independent of age, gender, and history of cardiovascular diseases has been confirmed. Disturbed iron metabolism might also play a role in the prognosis of patients with COVID-19. Moreover, alterations of iron homeostasis can persist long after COVID-19 onset and could be associated with impaired physical performance. We aimed to evaluate the levels of parameters associated with iron metabolism in patients hospitalised with COVID-19 during a 1-week period. In our study, 53 patients were included and they were further divided into two groups according to the outcome: positive (recovery and discharge from hospital) or negative (aggravation, exitus, or both). Their blood samples were collected on Days 1, 3, and 7 during hospitalization and basic laboratory analyses were performed, including measurement of iron metabolism parameters. All patients had pathologically increased plasmatic levels of ferritin and decreased levels of transferrin during the whole observation period. We have not found any correlation between levels of these markers and patients' prognosis. However, levels of ferritin significantly decreased and levels of transferrin significantly increased on the seventh day only in patients with a positive outcome. Further studies with a longer observation period are warranted to evaluate the period needed for reestablishment of iron homeostasis. [ABSTRACT FROM AUTHOR]