EnhFFL: A database of enhancer mediated feed-forward loops for human and mouse. Issue 2 (14th April 2021)

• Record Type: Journal Article
• Authors: Kang, Ran; Tan, Zhengtang; Lang, Mei; Jin, Linqi; Zhang, Yin; Zhang, Yiming; Guo, Tailin; Guo, Zhiyun
• Is Part Of: Precision clinical medicine. Volume 4:Issue 2(2021)
• Page Start: 129
• Page End: 135
• Publication Date: 2021-04-14
• Subjects: database -- enhancer -- miRNA -- transcription factor -- feed-forward loop; Medicine -- Periodicals; Medical care -- Periodicals; Personalized medicine -- Periodicals; 610
• DOI: 10.1093/pcmedi/pbab006
• Languages: English
• ISSNs: 2096-5303

Abstract

Abstract: Feed-forward loops (FFLs) are thought to be one of the most common and important classes of transcriptional network motifs involved in various diseases. Enhancers are cis-regulatory elements that positively regulate protein-coding genes or microRNAs (miRNAs) by recruiting DNA-binding transcription factors (TFs). However, a comprehensive resource to identify, store, and analyze the FFLs of typical enhancer and super-enhancer FFLs is not currently available. Here, we present EnhFFL, an online database to provide a data resource for users to browse and search typical enhancer and super-enhancer FFLs. The current database covers 46 280/7000 TF-enhancer-miRNA FFLs, 9997/236 enhancer-miRNA-gene FFLs, 3 561 164/3 193 182 TF-enhancer-gene FFLs, and 1259/235 TF-enhancer feed-back loops (FBLs) across 91 tissues/cell lines of human and mouse, respectively. Users can browse loops by selecting species, types of tissue/cell line, and types of FFLs. EnhFFL supports searching elements including name/ID, genomic location, and the conservation of miRNA target genes. We also developed tools for users to screen customized FFLs using the threshold of q value as well as the confidence score of miRNA target genes. Disease and functional enrichment analysis showed that master miRNAs that are widely engaged in FFLs including TF-enhancer-miRNAs and enhancer-miRNA-genes are significantly involved in tumorigenesis. Database URL: http://lcbb.swjtu.edu.cn/EnhFFL/ .