Objectives Multi-system inflammatory syndrome in children (MIS-C) is a less understood and a rare complication of coronavirus disease-2019 (COVID-19). Given the scarce data regarding this novel disease, we aimed to describe the clinical features and outcomes of our patients with MIS-C and to evaluate the associated factors for the pediatric intensive care unit (PICU) admission. Methods The MIS-C patients under 18 years old diagnosed and treated in three referral centers between July 2020 and March 2021 were included. Data of the patients were retrospectively obtained from their medical records. Results Overall, 76 subjects (24 females) with a mean age of 8.17 ± 4.42 years were enrolled. Twenty-seven (35.5%) patients were admitted to the PICUs. The two most common systemic involvement patterns were cardiac and gastrointestinal. There was only one lethal outcome in a patient with underlying acute lymphoblastic leukemia. Those with higher procalcitonin levels at admission were found to stay longer in the hospital (r = 0.254, p = 0.027). The risk of PICU admission increased with age (aOR: 1.277; 95% CI: 1.089-1.498; p = 0.003) and with decreased initial serum albumin levels (aOR: 0.105; 95% CI: 0.029-0.378; p = 0.001). Conclusion Although there is a wide clinical variability among the patients with MIS-C, we suggest that those with older age and lower initial serum albumin levels merit close monitoring due to their higher risk for PICU admission.

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Henoch-Schönlein purpura (HSP) is the most common type of vasculitis in childhood, and severe complications due to intestinal and renal involvement can be observed. In this study, it was planned to investigate the value of mean platelet volume (MPV) and neutrophil-tolymphocyte ratio (NLR) in early detection of system involvement in HSP. Methods: A total of 119 patients diagnosed with HSP and 75 healthy controls were included in the study. Data on age, gender and physical examination as well as complete blood count, complete urine examination and faecal occult blood test were obtained from the files of the patients. Results: Gastrointestinal system (GIS) involvement was detected in 41 patients (34.45%), renal involvement in 35 patients (29.41%) and arthritis was detected in 21 patients (17.65%). It was determined that the mean hemoglobin (p=0.02) and MPV values (p=0.0001) o were significantly lower and the mean leukocyte (p=0.0001), platelet (p=0.0001), neutrophil (p=0.0001) count and NLR value (p=0.0001) were significantly higher in patients than in controls. No statistically significant difference was observed in the MPV and NLR values between patients with and without GIS involvement, renal involvement and arthritis. Conclusion: It is thought that MPV and NLR cannot be used as laboratory parameters in the early detection of system involvement in HSP.

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Objective: Coenzyme Q10 (CoQ10) administration is known to increase CoQ10 concentrations in the mitochondria of brain cells and facilitate the memory and learning processes in rats. This study aims to evaluate the effects of CoQ10 treatment on learning and memory functions in rat pups during early stages of development. Methods: A total of 21-day-old 24 pups were divided into 3 groups (8 pups in each group). A low dose of CoQ10 was administered via oral gavage once per day to one group, a high dose was administered to another group, and olive oil was administered to the control group. The cognitive and learning functions of rats in these groups were evaluated by the Morris water maze and probe tests. Results: Coenzyme Q10 administration was continued for 10 days. At the end of the 37 th day, the water maze test was used to evaluate learning and memory performance. No difference was observed in the test results among the high-dose, low-dose and control groups during the 5 days of training in the water maze test (p>0.05). Data from the probe trial indicated no statistically significant differences among rats that received high-, or low-dose CoQ10 or olive oil (control) (p=0.853). Conclusion: In our study, it was determined that administration of high-, or low-dose CoQ10 during childhood does not have a significant effect on learning and memory functions.