Characterization of Chicken Tumor Necrosis Factor-alpha, a Long Missed Cytokine in Birds

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378050%3A_____%2F18%3A00496044" target="_blank" >RIV/68378050:_____/18:00496044 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3389/fimmu.2018.00605" target="_blank" >http://dx.doi.org/10.3389/fimmu.2018.00605</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fimmu.2018.00605" target="_blank" >10.3389/fimmu.2018.00605</a>

Result language

angličtina

Original language name

Characterization of Chicken Tumor Necrosis Factor-alpha, a Long Missed Cytokine in Birds

Original language description

Tumor necrosis factor-alpha (TNF-alpha) is a pleiotropic cytokine playing critical roles in host defense and acute and chronic inflammation. It has been described in fish, amphibians, and mammals but was considered to be absent in the avian genomes. Here, we report on the identification and functional characterization of the avian ortholog. The chicken TNF-alpha (chTNF-alpha) is encoded by a highly GC-rich gene, whose product shares with its mammalian counterpart 45% homology in the extracellular part displaying the characteristic TNF homology domain. Orthologs of chTNF-alpha were identified in the genomes of 12 additional avian species including Palaeognathae and Neognathae, and the synteny of the closely adjacent loci with mammalian TNF-alpha orthologs was demonstrated in the crow (Corvus cornix) genome. In addition to chTNF-alpha, we obtained full sequences for homologs of TNF-alpha receptors 1 and 2 (TNFR1, TNFR2). chTNF-a mRNA is strongly induced by lipopolysaccharide (LPS) stimulation of monocyte derived, splenic and bone marrow macrophages, and significantly upregulated in splenic tissue in response to i.v. LPS treatment. Activation of T-lymphocytes by TCR crosslinking induces chTNF-alpha expression in CD4(+) but not in CD8(+) cells. To gain insights into its biological activity, we generated recombinant chTNF-alpha in eukaryotic and prokaryotic expression systems. Both, the full-length cytokine and the extracellular domain rapidly induced an NF kappa B-luciferase reporter in stably transfected CEC-32 reporter cells. Collectively, these data provide strong evidence for the existence of a fully functional TNF-alpha/TNF-alpha receptor system in birds thus filling a gap in our understanding of the evolution of cytokine systems.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30102 - Immunology

Project

<a href="/en/project/GA17-23675S" target="_blank" >GA17-23675S: Functional characterization of Avian Sarcoma and Leukosis Virus receptors</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frontiers in Immunology

ISSN

1664-3224

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

April

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

—

UT code for WoS article

000430208400001

EID of the result in the Scopus database

—