[Micro RNA-155 expression in hemodialysis PBMC]

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Context:

• MicroRNAs (miRNAs) are crucial post-transcriptional regulators of gene expression involved in various pathophysiological processes.
• Chronic kidney disease patients undergoing hemodialysis exhibit altered cellular functions and inflammatory states.

Purpose:

• To investigate the expression levels of miR-155 in peripheral blood mononuclear cells (PBMC) from chronic hemodialysis (HD) patients.
• To compare miR-155 expression in HD patients' PBMC before and after hemodialysis sessions.
• To assess the effect of phytohemagglutinin (PHA) stimulation on miR-155 expression in HD patients' PBMC.

Summary:

• Real-Time PCR analysis revealed significantly higher miR-155 relative quantity (RQ) in pre-dialysis PBMC of HD patients compared to healthy controls (3.77-fold increase, P=0.003).
• PHA stimulation further increased miR-155 RQ in HD patients' PBMC (1.79-fold increase, P=0.019) compared to non-stimulated PBMC.
• No significant difference in miR-155 expression was observed in HD patients' PBMC before and after hemodialysis sessions.

Impact:

• These findings indicate a significant upregulation of miR-155 in HD patients' PBMC, suggesting its potential role in the pathophysiology of chronic kidney disease.
• The observed miR-155 upregulation, particularly after PHA stimulation, may point towards an altered immune response in HD patients.
• Further research is warranted to elucidate the functional consequences of miR-155 dysregulation in hemodialysis patients.