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MicroRNA Expression Analysis of Centenarians and Rheumatoid Arthritis Patients Reveals a Common Expression Pattern

Francesca Balzano1, Marta Deiana2, Silvia Dei Giudici3

  • 1Department of Biomedical Sciences, University of Sassari, vl. San Pietro 43b, Sassari 07100, Italy.

International Journal of Medical Sciences
|August 22, 2017
PubMed

Insights

MicroRNAs (miRNAs) are key regulators of gene expression. This study found that specific miRNAs, including miR-425-5p, miR-21, and miR-212, are downregulated in centenarians and rheumatoid arthritis patients, suggesting their role in aging and disease.

Area of Science:

  • Molecular Biology
  • Genetics
  • Immunology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression post-transcriptionally.
  • Dysregulation of miRNAs is implicated in aging and autoimmune diseases like rheumatoid arthritis.
  • Understanding miRNA profiles can provide insights into biological aging and disease pathogenesis.

Purpose of the Study:

  • To compare the expression of seven specific miRNAs in human plasma from healthy controls, centenarians, and rheumatoid arthritis patients.
  • To investigate the potential involvement of these miRNAs in longevity and autoimmune disease.
  • To explore correlations between miRNA expression and corticosteroid treatment.

Main Methods:

  • Quantification of seven miRNAs (miR-125b-5p, miR-425-5p, miR-200b5p, miR-200c-3p, miR-579-3p, miR-212-3p, miR-21-5p, miR-126-3p) in 62 plasma samples using TaqMan MicroRNA assays.
  • Analysis of miRNA expression profiles in 20 healthy controls, 14 centenarians, and 28 rheumatoid arthritis patients.
  • Relative miRNA expression analysis performed using REST software.

Main Results:

  • A significant decrease in the expression of miR-425-5p, miR-21, and miR-212 was observed in both centenarians and rheumatoid arthritis patients compared to healthy controls.
  • These findings suggest a common miRNA dysregulation pattern in extreme longevity and an autoimmune disease.
  • A potential association between corticosteroid treatment and altered miRNA expression levels was identified.

Conclusions:

  • The study identifies specific downregulated miRNAs (miR-425-5p, miR-21, miR-212) in centenarians and rheumatoid arthritis patients, indicating their potential roles in aging and autoimmunity.
  • These miRNAs may serve as biomarkers for aging and rheumatoid arthritis.
  • Further research is warranted to elucidate the functional mechanisms and therapeutic implications of these miRNA alterations, particularly in relation to corticosteroid therapy.
Keywords:
autoimmune diseasescentenariansglucocorticoidsmiRNA

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