International Journal of Biological Sciences

Impact factor
3.873

ISSN 1449-2288

News feeds of IJBS published articles
My Manuscript
My Account

Journal of Biomedicinenew

Theranostics

International Journal of Medical Sciences

Journal of Cancer

Oncomedicine

Journal of Genomics

Journal of Bone and Joint Infection (JBJI)

Nanotheranostics

Journal of Genomics now in PubMed/PubMed Central. Submit manuscript...

PubMed Central Indexed in Journal Impact Factor

Int J Biol Sci 2012; 8(7):1013-1022. doi:10.7150/ijbs.3836

Research Paper

MicroRNA Expression Profile in RAW264.7 cells in Response to Brucella melitensis Infection

Ke Zheng1*, Dong-Sheng Chen1*, Yi-Quan Wu1, Xian-Jin Xu1, Hui Zhang2, Chuang-Fu Chen2, Huan-Chun Chen1, Zheng-Fei Liu1 ✉

1. State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
2. Department of Preventive Veterinary Medicine, College of Animal Science & Technology, Shihezi University, Shihezi city, China
* Contributed equally to this work.

Abstract

MicroRNA (miRNA) is small non-coding RNA with approximate 22 nt in length. Recent studies indicate that miRNAs play significant roles in pathogen-host interactions. Brucella organisms are Gram-negative facultative intracellular bacteria that cause Brucellosis. Brucella strains infect macrophages and establish chronic infection by altering host life activities including apoptosis and autophagy. Here, we report a comprehensive analysis of miRNA expression profiles in mock- and Brucella-infected RAW264.7 cells using high-throughput sequencing approach. In total, 344 unique miRNAs were co-expressed in the two libraries, in which 57 miRNAs were differentially expressed. Eight differentially expressed miRNAs with high abundance were subjected to further analysis. The GO enrichment analysis suggests that the putative target genes of these differentially expressed miRNAs are involved in apoptosis, autophagy and immune response. In particular, a total of 25 target genes are involved in regulating apoptosis and autophagy, indicating that these miRNAs may play important regulatory roles in the Brucella-host interactions. Furthermore, the interactions of miR-1981 and its target genes, Bcl-2 and Bid, were validated by luciferase assay. The results show that miR-1981 mimic up-regulated the luciferase activity of psiCHECK-2 Bcl-2 3′ UTR, but the luciferase activity of psiCHECK-2 Bid 3′ UTR was not changed significantly. Taken together, these data provide valuable framework on Brucella induced miRNA expression in RAW264.7 cells, and suggest that Brucella may establish chronic infection by regulating miRNA expression profile.

Keywords: Brucella, RAW264.7, microRNA, high-throughput sequencing, apoptosis, autophagy

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See http://ivyspring.com/terms for full terms and conditions.
How to cite this article:
Zheng K, Chen DS, Wu YQ, Xu XJ, Zhang H, Chen CF, Chen HC, Liu ZF. MicroRNA Expression Profile in RAW264.7 cells in Response to Brucella melitensis Infection. Int J Biol Sci 2012; 8(7):1013-1022. doi:10.7150/ijbs.3836. Available from http://www.ijbs.com/v08p1013.htm