Background: Thalassemia is a genetic blood disorder characterized by abnormal hemoglobin production. MicroRNAs (miRNAs) regulate gene expression and are implicated in thalassemia pathogenesis. This study aimed to profile circulating miRNAs in transfusion-dependent (TD), Thalassemia trait (TT), and non-thalassemic individuals, and elucidate their functional pathways. Methods: Serum samples were collected from TD thalassemia patients (n = 4), thalassemia trait (n = 4), and healthy controls (n = 4). Total RNA was extracted and miRNA expression analyzed using NanoString nCounter assays. The nCounter Human v3 miRNA panel consisting of 800 miRNAs was used to scan and quantify miRNA levels. Differentially expressed miRNAs between the three groups were identified through statistical analysis. Bioinformatics analysis using DIANA-miRPath was then conducted on the top differentially expressed miRNAs to identify associated molecular pathways and gene targets. Results: Three miRNAs (miR-4435, miR-566, miR-219a) were upregulated while miR-485-5p was downregulated in both TD and TT groups versus controls. miRNA profiles were also compared between TD and TT groups. Initial pathway analysis revealed involvement of upregulated miRNAs in hematopoietic, erythroid differentiation, and AMPK signaling pathways. Conclusion: Distinct circulating miRNA profiles exist between TD, TT, and healthy controls. miR-4435, miR-566, and miR-219a are consistently upregulated while miR-485-5p is downregulated, suggesting their functional significance.
thalassemia; miRNA; therapeutic; transfusion