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Gene expression changes in chicken NLRC5 signal pathway associated with in vitro avian leukosis virus subgroup J

L L Qiu1, L Xu1, X M Guo1

  • 1College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu, China.

Genetics and Molecular Research : GMR
|April 7, 2016
PubMed

Insights

Nucleotide-binding oligomerization domain-like receptors (NLRs) are crucial for innate immunity. This study shows NLRC5 and related genes are vital for chicken antiviral defense against avian leukosis virus (ALV-J) infection.

Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • Nucleotide-binding oligomerization domain-like receptors (NLRs) function as pattern-recognition receptors in innate immunity.
  • The specific role of NLRC5 in NF-κB activation and MHC-I expression is not fully understood.
  • Avian leukosis virus (ALV-J) infection causes immunosuppression in poultry, leading to significant economic losses.

Purpose of the Study:

  • To investigate the role of the NLRC5 signaling pathway in chicken antiviral immunity against ALV-J.
  • To analyze the mRNA expression levels of key genes in the NLRC5 pathway following ALV-J infection in chicken embryo fibroblasts.

Main Methods:

  • Quantitative real-time polymerase chain reaction (qRT-PCR) was used to measure mRNA expression levels.
  • Secondary chicken embryo fibroblasts were infected with ALV-J.
  • Gene expression was analyzed at 7 days post-infection (d.p.i.).

Main Results:

  • TLR7, MHC-I, and IL-18 mRNA expression significantly increased in ALV-J infected cells at 7 d.p.i.
  • NLRC5 and IL-6 mRNA expression were significantly downregulated at 7 d.p.i.
  • NF-κB, STAT1, and STAT3 mRNA expression levels showed no significant alteration.

Conclusions:

  • NLRC5 and associated pathway genes are critical components of the antiviral immune response to ALV-J infection in chickens.
  • The findings highlight the complex regulation of the NLRC5 pathway during viral infection.
  • MHC-I expression is influenced by cell type and viral infection status.

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