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Negative Regulation of Semaphorin-3A Expression in Peripheral Blood Mononuclear Cells Using MicroRNA-497-5p

Shima Shapoori1, Mazdak Ganjalikhani-Hakemi1, Mahsa Rezaeepoor1

  • 1Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

Iranian Journal of Medical Sciences
|August 24, 2019
PubMed
Abstract

Insights

MicroRNA-497-5p suppresses Semaphorin-3A expression in immune cells, suggesting potential therapeutic targets for autoimmune diseases like multiple sclerosis and rheumatoid arthritis.

Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Semaphorin-3A (Sema3A) is an immune modulator implicated in autoimmune disease pathogenesis.
  • MicroRNAs (miRNAs) regulate gene expression post-transcriptionally and may influence semaphorin function.
  • Previous studies indicate elevated miR-497-5p and reduced Sema3A in certain autoimmune disorders.

Purpose of the Study:

  • To investigate the correlation between Sema3A and miR-497-5p in peripheral blood mononuclear cells (PBMCs).
  • To determine the effect of miR-497-5p on Sema3A expression in PBMCs.

Main Methods:

  • PBMCs were transfected with a miR-497-5p mimic.
  • Sema3A expression and secretion were measured using ELISA and qPCR.
  • Cell viability was assessed via MTT assay.

Main Results:

  • Transfection with miR-497-5p mimic significantly downregulated Sema3A gene expression (P=0.0001) and secretion (P=0.032).
  • miR-497-5p mimic transfection and subsequent Sema3A downregulation did not impact PBMC viability (P=0.061).

Conclusions:

  • miR-497-5p exhibits a potent suppressive effect on Sema3A expression.
  • Both Sema3A and miR-497-5p represent promising therapeutic targets for autoimmune diseases, including multiple sclerosis and rheumatoid arthritis.
Keywords:
MicroRNAsMononuclear phagocyte systemSemaphorin-3AAutoimmune disease

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