Juvenile Rheumatoid Arthritis and Vaccines

6 yo girl 8 days after 2nd dose Pfizer (10 mcgm w/Tris) 2 days in the hosp Reactive Arthritis "7-8 days after receiving second dose of covid vaccine, patient developed erythema, warmth, and edema to bilateral ankles as well as fever. Consistent with reactive arthritis."

16 yo female - NM 2 days post 1st dose Pfizer "48hrs post-💉 began with polyarthralgia, progressed to myalgias, arthritis, weight loss, abdominal pain/diarrhea, mucosal ulceration, and dyspnea, now admitted for evaluation which is suggestive of systemic lupus erythematosus"

6 yo boy 3 days post 1st dose Pfizer (10 mcgm w/Tris) 7 days in hospital Reactive Arthritis Cellulitis Pharyngeal "within 2 days developed R sided cervical adenopathy and retropharyngeal cellulitis/phlegmon., fevers. hospitalized 11/15-21 with such."

https://pubmed.ncbi.nlm.nih.gov/34033732/ Reactive arthritis after COVID-19 vaccination Qi-Jun An 1, De-An Qin 1, Jin-Xian Pei 2 Affiliations expand PMID: 34033732 PMCID: PMC8381833 (available on 2022-05-25) DOI: 10.1080/21645515.2021.1920274 Abstract The severe acute respiratory syndrome coronavirus 2-induced coronavirus disease 2019 (COVID-19) has had a global spread. Vaccines play an essential role in preventing the spread. However, almost all types of vaccines have been reported to be associated with adverse events. Reactive arthritis (ReA) after vaccination has been reported; however, ReA after COVID-19 vaccination has not been reported. We reported a 23-year-old woman who suffered from an acute ReA on her left knee joint after COVID-19 vaccination and discussed the etiology and preventive strategy. She presented with swollen, painful left knee joint for 18 d. She had been inoculated 0.5 ml CoronaVac vaccine on 0 d and the 14th day with deltoid intramuscular injection. Finally, s...

Abstract Preclinical studies of COVID-19 mRNA vaccine BNT162b2 , developed by Pfizer and BioNTech, showed reversible hepatic effects in animals that received the BNT162b2 injection. Furthermore, a recent study showed that SARS-CoV-2 RNA can be reverse-transcribed and integrated into the genome of human cells. In this study, we investigated the effect of BNT162b2 on the human liver cell line Huh7 in vitro. Huh7 cells were exposed to BNT162b2, and quantitative PCR was performed on RNA extracted from the cells. We detected high levels of BNT162b2 in Huh7 cells and changes in gene expression of long interspersed nuclear element-1 (LINE-1), which is an endogenous reverse transcriptase. Immunohistochemistry using antibody binding to LINE-1 open reading frame-1 RNA-binding protein (ORFp1) on Huh7 cells treated with BNT162b2 indicated increased nucleus distribution of LINE-1. PCR on genomic DNA of Huh7 cells exposed to BNT162b2 amplified the DNA sequence unique to BNT162b2. Our results indicat...

https://pubmed.ncbi.nlm.nih.gov/20046868/ Background: The cause of autoimmunity, which is unknown, is investigated from a different angle, i.e., the defect in immune 'system', to explain the cause of autoimmunity. Methodology/principal findings: Repeated immunization with antigen causes systemic autoimmunity in mice otherwise not prone to spontaneous autoimmune diseases. Overstimulation of CD4(+) T cells led to the development of autoantibody-inducing CD4(+) T (aiCD4(+) T) cell which had undergone T cell receptor (TCR) revision and was capable of inducing autoantibodies. The aiCD4(+) T cell was induced by de novo TCR revision but not by cross-reaction, and subsequently overstimulated CD8(+) T cells, driving them to become antigen-specific cytotoxic T lymphocytes (CTL). These CTLs could be further matured by antigen cross-presentation, after which they caused autoimmune tissue injury akin to systemic lupus erythematosus (SLE). Conclusions/significance: Systemic autoimmunit...