TY - JOUR
T1 - LincRNA-Cox2 modulates TNF-α-induced transcription of Il12b gene in intestinal epithelial cells through regulation of Mi-2/NuRD-mediated epigenetic histone modifications
AU - Tong, Qiang
AU - Gong, Ai Yu
AU - Zhang, Xin Tian
AU - Lin, Chengchi
AU - Ma, Shibin
AU - Chen, Jing
AU - Hu, Guoku
AU - Chen, Xian Ming
N1 - Funding Information:
This work was supported by U.S. National Institutes of Health (NIH) National Institute of Allergy and Infectious Diseases Grants AI095532 and AI116323 and by Creighton Cancer and Smoking Development Award LB595 (to X.-M.C.). This project was also supported by NIH National Center for Research Resources Grant G20RR024001. The authors declare no conflicts of interest.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Long intergenic noncoding RNAs (lincRNAs) can regulate the transcription of inflammatory genes and thus may represent a new group of inflammatory mediators with a potential pathogenic role in inflammatory diseases. Here, our genome-wide transcriptomic data show that TNF-α stimulation caused upregulation of 171 lincRNAs and down-regulation of 196 lincRNAs in murine intestinal epithelial cells in culture. One of the up-regulated lincRNAs, lincRNA-Cox2, is an early-responsive lincRNA induced by TNF-α through activation of the NF-κB signaling pathway. Knockdown of lincRNA-Cox2 resulted in reprogramming of the gene expression profile in intestinal epithelial cells in response to TNF-α stimulation. Specifically, lincRNA-Cox2 silencing significantly (P <0.05) enhanced the transcription of Il12b, a secondary late-responsive gene induced by TNF-α. Mechanistically, lincRNA-Cox2 promoted the recruitment of the Mi-2/nucleosome remodeling and deacetylase (Mi-2/NuRD) repressor complex tothe Il12b promoter region. Recruitment of the Mi-2/NuRD complex was associated with decreased H3K27 acetylation and increased H3K27 dimethylation at the Il12b promoter region, which might contribute to Il12b trans-suppression by lincRNA-Cox2. Thus, our data demonstrate a novel mechanism of epigenetic modulation by lincRNA-Cox2 on Il12b transcription, supporting an important role for lincRNAs in the regulation of intestinal epithelial inflammatory responses.
AB - Long intergenic noncoding RNAs (lincRNAs) can regulate the transcription of inflammatory genes and thus may represent a new group of inflammatory mediators with a potential pathogenic role in inflammatory diseases. Here, our genome-wide transcriptomic data show that TNF-α stimulation caused upregulation of 171 lincRNAs and down-regulation of 196 lincRNAs in murine intestinal epithelial cells in culture. One of the up-regulated lincRNAs, lincRNA-Cox2, is an early-responsive lincRNA induced by TNF-α through activation of the NF-κB signaling pathway. Knockdown of lincRNA-Cox2 resulted in reprogramming of the gene expression profile in intestinal epithelial cells in response to TNF-α stimulation. Specifically, lincRNA-Cox2 silencing significantly (P <0.05) enhanced the transcription of Il12b, a secondary late-responsive gene induced by TNF-α. Mechanistically, lincRNA-Cox2 promoted the recruitment of the Mi-2/nucleosome remodeling and deacetylase (Mi-2/NuRD) repressor complex tothe Il12b promoter region. Recruitment of the Mi-2/NuRD complex was associated with decreased H3K27 acetylation and increased H3K27 dimethylation at the Il12b promoter region, which might contribute to Il12b trans-suppression by lincRNA-Cox2. Thus, our data demonstrate a novel mechanism of epigenetic modulation by lincRNA-Cox2 on Il12b transcription, supporting an important role for lincRNAs in the regulation of intestinal epithelial inflammatory responses.
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U2 - 10.1096/fj.15-279166
DO - 10.1096/fj.15-279166
M3 - Article
C2 - 26578685
AN - SCOPUS:84963949133
VL - 30
SP - 1187
EP - 1197
JO - FASEB Journal
JF - FASEB Journal
SN - 0892-6638
IS - 3
ER -