PMID- 37892261 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231030 IS - 2227-9067 (Print) IS - 2227-9067 (Electronic) IS - 2227-9067 (Linking) VI - 10 IP - 10 DP - 2023 Sep 25 TI - Atopy and Elevation of IgE, IgG3, and IgG4 May Be Risk Factors for Post COVID-19 Condition in Children and Adolescents. LID - 10.3390/children10101598 [doi] LID - 1598 AB - SARS-CoV-2 infection causes transient cardiorespiratory and neurological disorders, and severe acute illness is rare among children. Post COVID-19 condition (PCC) may cause profound, persistent phenotypes with increasing prevalence. Its manifestation and risk factors remain elusive. In this monocentric study, we hypothesized that atopy, the tendency to produce an exaggerated immunoglobulin E (IgE) immune response, is a risk factor for the manifestation of pediatric PCC. We present a patient cohort (n = 28) from an early pandemic period (2021-2022) with comprehensive evaluations of phenotypes, pulmonary function, and molecular investigations. PCC predominantly affected adolescents and presented with fatigue, dyspnea, and post-exertional malaise. Sensitizations to aeroallergens were found in 93% of cases. We observed elevated IgE levels (mean 174.2 kU/L, reference < 100 kU/L) regardless of disease severity. Concurrent Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) was found in 29% of patients that also faced challenges in school attendance. ME/CFS manifestation was significantly associated with elevated immunoglobulin G subclasses IgG3 (p < 0.05) and IgG4 (p < 0.05). A total of 57% of patients showed self-limiting disease courses with mean recovery at 12.7 months (range 5-25 months), 29% at 19.2 months (range 12-30 months), and the rest demonstrated overall improvement. These findings offer additional insights into immune dysregulation as a risk factor for pediatric PCC. FAU - Korner, Robert Walter AU - Korner RW AUID- ORCID: 0000-0003-3164-4952 AD - Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. FAU - Bansemir, Ole Yannick AU - Bansemir OY AD - Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. FAU - Franke, Rosa AU - Franke R AD - Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. FAU - Sturm, Julius AU - Sturm J AD - Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. FAU - Dafsari, Hormos Salimi AU - Dafsari HS AD - Department of Pediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. AD - Center for Rare Diseases, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany. AD - Max-Planck-Institute for Biology of Ageing, 50931 Cologne, Germany. AD - Cologne Excellence Cluster on Cellular Stress Responses in Aging Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany. LA - eng GR - 413543196/Cologne Clinician Scientist Program / Medical Faculty / University of Cologne and German Research Foundation/ PT - Journal Article DEP - 20230925 PL - Switzerland TA - Children (Basel) JT - Children (Basel, Switzerland) JID - 101648936 PMC - PMC10605545 OTO - NOTNLM OT - SARS-CoV-2 OT - adolescents OT - atopic disease OT - children OT - long COVID OT - post COVID-19 condition COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results. EDAT- 2023/10/28 11:44 MHDA- 2023/10/28 11:45 PMCR- 2023/09/25 CRDT- 2023/10/28 01:03 PHST- 2023/08/20 00:00 [received] PHST- 2023/09/04 00:00 [revised] PHST- 2023/09/12 00:00 [accepted] PHST- 2023/10/28 11:45 [medline] PHST- 2023/10/28 11:44 [pubmed] PHST- 2023/10/28 01:03 [entrez] PHST- 2023/09/25 00:00 [pmc-release] AID - children10101598 [pii] AID - children-10-01598 [pii] AID - 10.3390/children10101598 [doi] PST - epublish SO - Children (Basel). 2023 Sep 25;10(10):1598. doi: 10.3390/children10101598.