2. Academic Validation
  3. Regulatory mechanism of microRNA-155 in chicken embryo fibroblasts in response to reticuloendotheliosis virus infection

Regulatory mechanism of microRNA-155 in chicken embryo fibroblasts in response to reticuloendotheliosis virus infection

  • Vet Microbiol. 2020 Mar;242:108610. doi: 10.1016/j.vetmic.2020.108610.
Chang Gao 1,  Shengyuan Dang 2,  Jie Zhai 3,  Shimin Zheng 4
Affiliations

Affiliations

  • 1 Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, NO. 59 Mucai Street, Harbin 150030, People's Republic of China. Electronic address: gaochang0520@163.com.
  • 2 Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, NO. 59 Mucai Street, Harbin 150030, People's Republic of China. Electronic address: dangshengyuan@qq.com.
  • 3 Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, NO. 59 Mucai Street, Harbin 150030, People's Republic of China. Electronic address: blzhaijie@163.com.
  • 4 Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, NO. 59 Mucai Street, Harbin 150030, People's Republic of China. Electronic address: zhengshiminbl@sohu.com.
PMID: 32122614 DOI: 10.1016/j.vetmic.2020.108610
Abstract

Reticuloendotheliosis virus (REV) Infection of multiple avian species can lead to a number of diseases such as runting syndrome, immunosuppression and oncogenesis, causing major economic losses. MicroRNAs play important roles in post-transcriptional regulation, effectively inhibiting protein synthesis, and participating in many biological processes in cells, including proliferation, differentiation, Apoptosis, lipometabolism, virus Infection and replication, and tumorigenesis. Based on our previous high-throughput Sequencing results, we explore the regulatory mechanisms of microRNA-155(miR-155) in chicken embryo fibroblasts (CEFs) in response to REV Infection. Our results revealed expression of miR-155 in CEFs after REV Infection upregulated in a time- and dose-dependent manner, indicating miR-155 plays a role in REV Infection in CEFs indeed. After transfected with miR-155-mimic and miR-155-inhibitor, we found overexpression of miR-155 targeted caspase-6 and FOXO3a to inhibit Apoptosis and accelerate cell cycle, thus improving viability of REV-infected CEFs. This result also verified the protective role of miR-155 in the viability of CEFs in the presence of REV. Knockdown of miR-155 also supported these above conclusions. Our findings uncover a new mechanism of REV pathogenesis in CEFs, and also provide a theoretical basis for uncovering new effective treatment and prevention methods for RE based on miR-155.

Keywords

Apoptosis; Caspase-6; Cell cycle; FOXO3a; MicroRNA-155; Reticuloendotheliosis virus.

Figures
Products