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IFNA-AS1 regulates CD4+ T cell activation in myasthenia gravis though HLA-DRB1

Mengchuan Luo1, Xiaofang Liu1, Huanyu Meng1

  • 1Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; Neurology Institute of Xiangya Hospital, Central South University, Changsha, Hunan 410008, China.

Clinical Immunology (Orlando, Fla.)
|August 21, 2017
PubMed

Insights

The long non-coding RNA IFNG-AS1 is abnormally expressed in myasthenia gravis (MG) patients. This lncRNA influences T cell subsets and immune responses, suggesting a role in MG pathogenesis.

Area of Science:

  • Immunology
  • Molecular Biology
  • Genetics

Background:

  • Abnormal CD4+ T cell activation is implicated in myasthenia gravis (MG) pathogenesis.
  • The role of long non-coding RNAs (lncRNAs) in regulating CD4+ T cells in MG remains largely unknown.

Purpose of the Study:

  • To investigate the expression and function of lncRNAs, specifically IFNG-AS1, in CD4+ T cells within the context of myasthenia gravis.
  • To elucidate the mechanisms by which IFNG-AS1 influences T cell subsets and immune responses in MG.

Main Methods:

  • Quantitative real-time PCR to assess IFNG-AS1 expression in MG patients.
  • In vitro studies using an experimental autoimmune myasthenia gravis (EAMG) model to evaluate IFNG-AS1's impact on Th1 and Treg cell proliferation and transcription factors.
  • Analysis of HLA-DRB and HLA-DOB expression, and CD40L and CD4+ T cell activation in MG patients.

Main Results:

  • IFNG-AS1 was found to be abnormally expressed in MG patients, correlating with quantitative MG scores and anti-AchR antibody levels.
  • IFNG-AS1 influenced Th1/Treg cell proliferation and regulated their transcription factors in an EAMG model.
  • IFNG-AS1 reduced HLA-DRB and HLA-DOB expression, showing a negative correlation in MG.
  • IFNG-AS1 affected CD40L expression and CD4+ T cell activation in MG patients, partly via HLA-DRB1.

Conclusions:

  • IFNG-AS1 is abnormally expressed in myasthenia gravis.
  • IFNG-AS1 plays a role in regulating CD4+ T cell subsets and immune responses in MG.
  • IFNG-AS1 may be a potential therapeutic target for CD4+ T cell-mediated immune responses in MG.

Keywords:
CD4(+)HLA-DOBHLA-DRB1IFNG-AS1Long non-coding RNAs (lncRNAs)Myasthenia gravis

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