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A Pilot Study of Circulating microRNA Expression in Newly Diagnosed Type 2 Diabetes Using a Pooled Sample Approach.

Loredana Deaconu1, Romulus Zorin Timar1,2,3, Cristiane Dragomir4

  • 1Second Department of Internal Medicine, "Victor Babes" University of Medicine and Pharmacy, 300041 Timisoara, Romania.

Clinics and Practice
|June 25, 2026
PubMed
Summary

This study identified circulating microRNAs (miRNAs) with altered expression in type 2 diabetes mellitus patients. These potential biomarkers could aid in diagnosing and managing diabetes complications.

Keywords:
biomarkersdiabetes mellitusmiRNApooled analysis

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
  • miRNAs are emerging as potential biomarkers for type 2 diabetes mellitus (T2DM) and its complications.

Purpose of the Study:

  • To identify circulating miRNAs with differential expression in plasma of newly diagnosed T2DM patients compared to healthy controls.
  • To explore the potential of these miRNAs as diagnostic or prognostic markers for T2DM.

Main Methods:

  • Plasma samples from T2DM patients (n=24) and controls (n=12) were pooled within groups.
  • Total RNA was extracted, and miRNA expression was analyzed using high-throughput qPCR.
  • Two normalization methods were applied, with overlapping results used for analysis.

Main Results:

  • A total of 33 and 42 differentially expressed miRNAs were identified by the two normalization methods.
  • Fourteen miRNAs were consistently downregulated in T2DM patients.
  • Several identified miRNAs (e.g., hsa-miR-26a-5p, hsa-miR-146a-5p) are linked to glucose metabolism, inflammation, and diabetic complications.

Conclusions:

  • This pilot study identified a panel of circulating miRNAs with altered expression in pooled plasma from newly diagnosed T2DM patients.
  • These findings suggest potential diagnostic and prognostic value for these miRNAs.
  • Further validation in larger studies with individual-level analysis is warranted.