Common and specific downstream signaling targets controlled by Tlr2 and Tlr5 innate immune signaling in zebrafish

BMC Genomics

Herman P. Spaink¹  Annemarie H. Meijer¹  Rubén Marín-Juez²  Shuxin Yang¹ 

[1] Institute of Biology, Leiden University, Leiden, 2300 RA, The Netherlands;Present address: Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, Bad Nauheim, 61231, Germany

关键词: Innate immunity;    Pam3CSK4;    Flagellin;    TLR5;    TLR2;    Zebrafish;    TLR signaling;   

Others  :  1221881
DOI  :  10.1186/s12864-015-1740-9

 received in 2015-05-11, accepted in 2015-06-30,  发布年份 2015

【 摘 要 】

Background

Although the responses to many pathogen associated molecular patterns (PAMPs) in cell cultures and extracted organs are well characterized, there is little known of transcriptome responses to PAMPs in whole organisms. To characterize this in detail, we have performed RNAseq analysis of responses of zebrafish embryos to injection of PAMPs in the caudal vein at one hour after exposure. We have compared two ligands that in mammals have been shown to specifically activate the TLR2 and TLR5 receptors: Pam3CSK4 and flagellin, respectively.

Results

We identified a group of 80 common genes that respond with high stringency selection to stimulations with both PAMPs, which included several well-known immune marker genes such as il1b and tnfa. Surprisingly, we also identified sets of 48 and 42 genes that specifically respond to either Pam3CSK4 or flagellin, respectively, after a comparative filtering approach. Remarkably, in the Pam3CSK4 specific set, there was a set of transcription factors with more than 2 fold-change, as confirmed by qPCR analyses, including cebpb, fosb, nr4a1 and egr3. We also showed that the regulation of the Pam3CSK4 and flagellin specifically responding sets is inhibited by knockdown of tlr2 or tlr5, respectively.

Conclusions

Our studies show that Pam3CSK4 and flagellin can stimulate the Tlr2 and Tlr5 signaling pathways leading to common and specific responses in the zebrafish embryo system.

【 授权许可】

   
2015 Yang et al.

【 图 表 】

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