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Exploring microRNA signatures in pediatric non-infectious uveitis: meta-analysis and molecular profiling of patient
Olga Wawrzyniak1, Dariusz Wawrzyniak2, Michał Smuszkiewicz2
1Department of Ophthalmology, Poznan University of Medical Sciences, Augustyna Szamarzewskiego 84, 61-848, Poznan, Poland.
Insights
This study investigated microRNA (miRNA) profiles in pediatric autoimmune uveitis, finding that miR-204-5p and miR-155-5p may serve as molecular markers for autoimmune uveitis, sharing a common basis with other autoimmune conditions.
Area of Science:
- Ophthalmology
- Immunology
- Genetics
Background:
- Idiopathic uveitis (IU) in children lacks distinct non-coding RNA biomarkers.
- Understanding the molecular basis of IU is crucial for identifying shared pathways with other autoimmune diseases.
Purpose of the Study:
- To identify non-coding RNA (miRNA) signatures in pediatric idiopathic uveitis (IU).
- To explore miRNA expression profiles in pediatric IU and juvenile idiopathic arthritis-associated uveitis (JIA-AU).
- To determine a common molecular background between pediatric IU and other autoimmune diseases.
Main Methods:
- Quantitative real-time PCR analysis of serum samples from pediatric patients with IU, JIA-AU, and healthy controls.
- Comprehensive literature review of studies on miRNA and non-infectious uveitis/juvenile idiopathic arthritis.
- Target prediction analysis of identified miRNAs to assess their role in immunological pathways.
Main Results:
- Downregulation of miR-204-5p was observed in both pediatric IU and JIA-AU patient groups compared to healthy controls.
- miR-155-5p also showed altered expression, suggesting its involvement in autoimmune uveitis.
- No specific miRNA exclusively identified for idiopathic uveitis, but a shared molecular basis with other autoimmune diseases was confirmed.
Conclusions:
- miR-204-5p and miR-155-5p are potential molecular markers for autoimmune uveitis in the pediatric population.
- Pediatric idiopathic uveitis shares a molecular basis with other autoimmune diseases.
- Further research is needed to elucidate complex molecular interactions in autoimmune uveitis.
Abstract:
To find a distinct non-coding RNA characteristic for idiopathic uveitis in the pediatric population. To explore the autoimmune-related miRNA expression profile in pediatric patients with idiopathic uveitis (IU) and juvenile idiopathic arthritis-associated uveitis (JIA-AU) and find a common molecular background for idiopathic uveitis and other autoimmune diseases. The expression levels of miRNAs were analyzed by quantitative real-time PCR using serum samples from patients with idiopathic uveitis (n = 8), juvenile idiopathic arthritis-associated uveitis (n = 7), and healthy controls. We selected the most promising miRNAs from the original research papers: miR-16-5p, miR-26a-5p, miR-145-5p, and miR-451a as markers for juvenile idiopathic arthritis; miR-23a-3p, miR-29a-3p, miR-140-5p, miR-193a-5p, and miR-491-5p for uveitis in the adult population; and miR-125a-5p, miR-146a-5p, miR-155-5p, miR-223-5p, and miR-223-3p characteristic for both diseases and confirm their expression changes in serum from children with idiopathic uveitis. We comprehensively reviewed the literature enrolling the papers that met the inclusion criteria (miRNA and non-infectious uveitis/juvenile idiopathic arthritis) and performed target prediction analysis of appoint miRNAs. It additionally confirmed that altered miRNAs target the immunologically involved genes. Immunological-involved miRNAs such as miR-146a-5p and miR-155-5p show diverse expression levels in different patients as they interact with multiple targets. miR-204-5p is downregulated in both patient groups compared to healthy controls. miR-204-5p and miR-155-5p are candidates for molecular markers of autoimmune uveitis. We did not identify the miRNAs specific only to idiopathic uveitis, but for the first time in the pediatric population, we confirmed that this disease entity shares a molecular basis with other autoimmune diseases. Further studies are required to elucidate the molecular interactions among miRNAs, cytokines, and transcription factors within the intricate immune response, particularly in the eye.
