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MicroRNAs01:22

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
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MicroRNA Regulation in Systemic Lupus Erythematosus Pathogenesis.

Sheng Yan1, Lok Yan Yim1, Liwei Lu2

  • 1Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.

Immune Network
|July 8, 2014
PubMed
Summary
This summary is machine-generated.

MicroRNAs (miRNAs) regulate immune cell function and their dysregulation is linked to autoimmune diseases like systemic lupus erythematosus (SLE). Aberrant miRNA profiles in SLE impact immune cell activity and signaling pathways.

Keywords:
AutoimmunityMicroRNAsSystemic Lupus Erythematosus

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Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression, influencing immune cell differentiation and function.
  • Dysregulated miRNA networks are implicated in the pathogenesis of autoimmune diseases, including systemic lupus erythematosus (SLE).

Purpose of the Study:

  • To review the role of microRNAs in immune cell regulation and their connection to autoimmune diseases, particularly SLE.
  • To discuss the impact of aberrant miRNA expression on immune cell function and disease mechanisms in SLE.
  • To explore the diagnostic and therapeutic potential of miRNAs in SLE.

Main Methods:

  • Literature review of studies investigating miRNA involvement in autoimmunity and SLE.
  • Analysis of miRNA profiling data comparing SLE patients and healthy controls.
  • Discussion of functional outcomes associated with dysregulated miRNAs in SLE.

Main Results:

  • Interruption of miRNA biogenesis and processing enzymes leads to abnormal immune cell development and function in autoimmune conditions.
  • Distinct groups of miRNAs show aberrant expression in SLE, causing perturbed type I interferon signaling, DNA hypomethylation, and immune cell hyperactivation.
  • While individual miRNA patterns vary, overlapping functional consequences are observed in SLE patients.

Conclusions:

  • MicroRNA dysregulation significantly contributes to the pathogenesis of systemic lupus erythematosus by affecting immune cell function and signaling.
  • Despite challenges in identifying consistent miRNA biomarkers, their role in SLE pathogenesis is evident.
  • Advances in sequencing, bioinformatics, and functional models offer future potential for miRNA-based diagnostics and therapeutics in SLE.