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microRNA expression in autonomous thyroid adenomas: Correlation with mRNA regulation

Sébastien L Floor1, Christophe Trésallet2, Aline Hébrant1

  • 1Institute of Interdisciplinary Research (IRIBHM), Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium.

Molecular and Cellular Endocrinology
|April 29, 2015
PubMed

Insights

This study identified specific microRNAs (miRNAs) involved in autonomous thyroid adenoma development, revealing their role in regulating extracellular matrix and cAMP pathways. These findings offer insights into tumor growth and thyroid hormone regulation.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Genetics

Background:

  • Autonomous adenomas are benign thyroid tumors.
  • MicroRNAs (miRNAs) play crucial roles in gene regulation and have been implicated in various cancers.
  • Understanding miRNA deregulation in thyroid adenomas is essential for elucidating tumor development.

Purpose of the Study:

  • To identify deregulated miRNAs in autonomous thyroid adenoma.
  • To correlate miRNA dysregulation with messenger RNA (mRNA) targets.
  • To investigate the functional roles of identified miRNAs in tumor pathogenesis.

Main Methods:

  • Comparative analysis of miRNA expression profiles in autonomous adenoma and adjacent healthy thyroid tissue.
  • Bioinformatic prediction of miRNA mRNA targets.
  • Microarray analysis of mRNA expression.
  • Experimental validation of specific miRNA-mRNA interactions.

Main Results:

  • Twelve miRNAs were downregulated and one was upregulated in autonomous adenoma tissues.
  • Bioinformatic analysis identified enrichment of mRNA targets involved in extracellular matrix organization and phosphodiesterases.
  • Direct interaction between miR-101-3p, miR-144-3p, and PDE4D mRNA was validated.
  • Global miRNA profiles were largely unchanged, consistent with minimal deviation tumors.

Conclusions:

  • miRNAs are implicated in regulating extracellular matrix proteins and tissue remodeling during thyroid tumor development.
  • miRNAs contribute to the negative feedback of the cAMP pathway, limiting constitutive activation in autonomous adenomas.
  • These findings highlight the role of specific miRNAs in the pathogenesis of autonomous thyroid adenoma.
Keywords:
Autonomous adenomaECMcAMPmiRNA

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