Background: Infectious mononucleosis (IM) is a common disease in children; however, liver injury is its most common complication. However, the pathogenesis of IM complicated with liver injury is ambiguous. Thus, this study aimed to explore the potential mechanism of IM-associated liver injury.
Methods: This study was conducted at the Children's Hospital of Soochow University by collecting peripheral blood of 70 hospitalized children with IM. These patients were categorized into the liver injury (LIG, n = 35) and the non-liver injury groups (NLIG, n = 35), respectively. Subsequently, PBMCs and plasma were separated and obtained. PBMCs transcriptome sequencing was performed in two groups (5 cases in each group), and significantly differentially expressed genes (DEGs) were screened. Additionally, GO function enrichment, KEGG enrichment and GSEA analyses were performed. RT-PCR helped to detect the relative GBP5, NLRP3 and caspase-1 expressions in two groups (30 cases in each group) while the two groups' caspase-1, IL-1β and IL-18 in plasma levels were measured by ELISA. Thus, clinical and laboratory datas of 60 hospitalized children with IM were evaluated.
Results: Transcriptome sequencing results showed that 171 DEGs were screened in the NLIG group, compared with the LIG. Among them, 154 DEGs were up-regulated, and 17 were down-regulated, respectively. KEGG and GSEA analyses showed that IM-associated liver injury is correlated with a NOD-like receptor signaling pathway. Statistically significant differences were observed in the white blood cell and lymphocyte counts, CD3CD4 T cells, CD3CD8T cells, alanine aminotransferase (ALT), aspartate transaminase (AST), and lactate dehydrogenase (LDH) of the two groups (p < 0.05). Compared with NLIG, GBP5, NLRP3 and caspase-1 expressions in PBMCs, as well as the caspase-1, IL-1β and IL-18 in plasma levels, were significantly higher in LIG (p < 0.001). A correlation analysis revealed a positive correlation of GBP5 with LDH, ALT, AST, CD3CD8T cells and NLRP3 (p < 0.05).
Conclusions: Our findings demonstrate that GBP5 contributes to liver injury in IM children through the NLRP3-dependent pathway.
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