Journal of Clinical Immunology

, Volume 33, Issue 3, pp 567–576 | Cite as

MiR-320a is Downregulated in Patients with Myasthenia Gravis and Modulates Inflammatory Cytokines Production by Targeting Mitogen-activated Protein Kinase 1

  • Zhuoan Cheng
  • Shaobo Qiu
  • Lin Jiang
  • Anle Zhang
  • Wenjing Bao
  • Ping Liu
  • Jianwen Liu
Original Research


Myasthenia gravis (MG) are T-cell dependent antibody-mediated autoimmune disorders, microRNAs are important regulators of human autoimmune disease pathogenesis. Here, we investigated the miRNAs expression profiles in MG for the first time and found that miR-320a was significantly downregulated in MG patients compared to normal healthy people. Meanwhile, pro-inflammatory cytokins in MG patients were overexpressed. Furthermore, we identified MAPK1 as a direct target of miR-320a. Downregulation of miR-320a induced the overexpression of pro-inflammatory cytokins through promoting COX-2 expression. This process was modulated by ERK/ NF-κB pathways. Taken together, our findings suggested that miR-320a could play a role in modulation of inflammatory cytokins production.


Myasthenia gravis miR-320a MAPK1 cytokine COX-2 



Myasthenia gravis


Mitogen-activated protein kinase1


3′untranslated region


Glyceraldehyde 3-phosphate dehydrogenase


Peripheral blood mononuclear cell



This work was supported by Shanghai Science and Technology Commission (No. 10JC1414500) and the Shanghai Committee of Science and Technology [grant 11DZ2260600].

Supplementary material

10875_2012_9834_Fig6_ESM.jpg (25 kb)
Online Resource 1

MiR-486-5p (A) and miR-363(B) expression differentiate 34 MG patients from 10 normal control by real-time PCR (JPEG 24 kb)

10875_2012_9834_MOESM1_ESM.tif (1.9 mb)
High resolution image (TIFF 1975 kb)
10875_2012_9834_Fig7_ESM.jpg (26 kb)
Online Resource 2

The bioinformatic analysis data by targetscan database (available at (JPEG 25 kb)

10875_2012_9834_MOESM2_ESM.tif (4.9 mb)
High resolution image (TIFF 4982 kb)


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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.State Key Laboratory of Bioreactor Engineering & Shanghai Key Laboratory of New Drug Design, School of PharmacyEast China University of Science and TechnologyShanghaiPeople’s Republic of China
  2. 2.Longhua Hospital Affiliated to Shanghai University of traditional Chinese MedicineShanghaiPeople’s Republic of China
  3. 3.The China Affiliated Hospital of Liaoning University of Traditional Chinese MedicineLiaoningPeople’s Republic of China

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