Virologica Sinica

, Volume 32, Issue 4, pp 261–270 | Cite as

Influenza A virus-induced downregulation of miR-26a contributes to reduced IFNα/β production

  • Shijuan Gao
  • Jiandong Li
  • Liping Song
  • Jiaoxiang Wu
  • Wenlin Huang
Research Article


Innate immunity provides immediate defense against viral infection. Influenza A virus (IAV) is able to get past the first line of defense. Elucidation of the molecular interaction between influenza factors and the newly recognized host players in the innate response might help in our understanding of the root causes of virulence and pathogenicity of IAV. In this study, we show that expression of miR-26a leads to a significant inhibition of IAV replication. miR-26a does not directly target IAV genome. Instead, miR-26a activates the type I interferon (IFN) signaling pathway and promotes the production of IFN-stimulated genes, thus suppressing viral replication. Furthermore, ubiquitin-specific protease 3 (USP3), a negative regulator of type I IFN pathway, is targeted by miR-26a upon IAV challenge. However, miR-26a is significantly downregulated during IAV infection. Thus, downregulation of miR-26a is a new strategy evolved by IAV to counteract cellular antiviral responses. Our findings indicate that delivery of miR-26a may be a potential strategy for anti-IAV therapies.


Influenza A virus (IAV) innate immune response miR-26a USP3 


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This work was supported by grants from the National Basic Research Program of China (973 Program, No. 2012CB518900) and the Beijing Natural Science Foundation (No. 7122109).

Supplementary material

12250_2017_4004_MOESM1_ESM.pdf (270 kb)
Influenza A virus-induced downregulation of miR-26a contributes to reduced IFNα/β production


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Copyright information

© Wuhan Institute of Virology, CAS and Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  1. 1.The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Collaborative Innovation Center for Cardiovascular Disorders, Beijing Institute of Heart, Lung & Blood Vessel DiseasesBeijing Anzhen Hospital, Capital Medical UniversityBeijingChina
  2. 2.CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of MicrobiologyChinese Academy of SciencesBeijingChina
  3. 3.Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer MedicineGuangzhouChina
  4. 4.Beijing Municipal Center for Food Safety Monitoring and Risk AssessmentBeijingChina

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