Regulatory role of miRNA-26a in neonatal sepsis

Area of Science:

• Immunology
• Molecular Biology
• Neonatal Research

Background:

• Neonatal sepsis is a serious condition with significant morbidity and mortality.
• Understanding the molecular mechanisms underlying neonatal sepsis is crucial for developing effective treatments.
• MicroRNAs (miRNAs) are emerging as key regulators in various disease processes, including sepsis.

Purpose of the Study:

• To investigate the expression levels of microRNA (miRNA) 26a in neonatal sepsis.
• To explore the role of miRNA-26a in the pathogenesis of neonatal sepsis.
• To determine the relationship between miRNA-26a and interleukin-6 (IL-6) in neonatal sepsis.

Main Methods:

• Quantitative polymerase chain reaction (qPCR) was used to measure miRNA-26a and IL-6 mRNA expression in blood mononuclear cells and serum.
• Western blot and ELISA were employed to assess IL-6 protein levels.
• Lipopolysaccharide (LPS)-induced THP-1 cell models were used to simulate an *in vitro* septic environment.
• Dual-luciferase reporter assays confirmed the interaction between miRNA-26a and IL-6.

Main Results:

• Neonatal sepsis cases showed significantly elevated IL-6 mRNA and protein levels in blood mononuclear cells and serum compared to controls.
• A significant decrease in miRNA-26a expression was observed in neonatal sepsis patients.
• Similar inverse expression patterns of miRNA-26a and IL-6 were found in LPS-induced THP-1 cell models.
• IL-6 was identified as a direct target of miRNA-26a.

Conclusions:

• Downregulation of miRNA-26a is associated with upregulation of IL-6 in neonatal sepsis.
• miRNA-26a may play a regulatory role in the pathogenesis of neonatal sepsis and associated immune responses.
• These findings highlight miRNA-26a as a potential diagnostic marker or therapeutic target for neonatal sepsis.