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MicroRNA-messenger RNA interactions involving JAK-STAT signaling genes in colorectal cancer

Lila E Mullany1, Jennifer S Herrick1, Lori C Sakoda2

  • 1Department of Medicine, University of Utah, 383 Colorow, Salt Lake City, Utah.

Genes & Cancer
|January 4, 2019
PubMed

Insights

MicroRNAs (miRNAs) may prevent uncontrolled growth in colorectal cancer (CRC) by regulating messenger RNAs (mRNAs) involved in JAK-STAT signaling. This study reveals novel miRNA-mRNA interactions potentially controlling cancer progression.

Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • Janus kinase-Signal transducer and activator of transcription (JAK-STAT) signaling is crucial in cellular processes and implicated in cancer development.
  • MicroRNAs (miRNAs) are regulators of gene expression, proposed to counteract uncontrolled cell growth driven by persistent JAK-STAT activation.

Purpose of the Study:

  • To investigate the differential expression of messenger RNAs (mRNAs) and miRNAs in colorectal cancer (CRC) tissues compared to normal tissues.
  • To identify specific JAK-STAT signaling pathway genes and their associated miRNAs in CRC.
  • To explore the regulatory interactions between miRNAs and mRNAs within the JAK-STAT pathway in CRC.

Main Methods:

  • RNA sequencing (RNA-Seq) was employed to analyze mRNA expression.
  • Agilent Human miRNA Microarray V19.0 was used for miRNA expression profiling.
  • A negative binomial mixed effects model was applied to analyze differential gene expression and miRNA-mRNA interactions in 217 CRC cases.

Main Results:

  • 42 mRNAs showed significant differential expression between cancer and normal tissues.
  • Four mRNAs were dysregulated in microsatellite stable (MSS) tumors, and eight in microsatellite unstable (MSI)-specific tumors.
  • 17 significant miRNA-mRNA interactions were identified, with 116 total interactions analyzed, suggesting miRNAs mediate mRNA repression, particularly for receptor molecules involved in JAK-STAT signaling.

Conclusions:

  • miRNAs likely play a role in controlling JAK-STAT signaling by facilitating the degradation of receptor molecules, a known regulatory mechanism.
  • The identified miRNA-mRNA interactions provide insights into the molecular mechanisms underlying CRC development and progression.
  • Further research into these interactions could reveal novel therapeutic targets for colorectal cancer.
Keywords:
JAK-STATcancercolorectalmiRNAreceptor

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