Comprehensive Mapping of Key Regulatory Networks that Drive Oncogene Expression.

Comprehensive Mapping of Key Regulatory Networks that Drive Oncogene Expression.
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DOI:
10.1016/j.celrep.2020.108426
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发表时间:
2020-11-24
期刊:
影响因子:
8.8
通讯作者:
Sherwood RI
Sherwood RI
中科院分区:
生物学1区
文献类型:
--
作者:
Lin L;Holmes B;Shen MW;Kammeron D;Geijsen N;Gifford DK;Sherwood RI

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Gene expression is controlled by the collective binding of transcription factors to cis-regulatory regions. Deciphering gene-centered regulatory networks is vital to understanding and controlling gene misexpression in human disease; however, systematic approaches to uncovering regulatory networks have been lacking. Here we present high-throughput interrogation of gene-centered activation networks (HIGAN), a pipeline that employs a suite of multifaceted genomic approaches to connect upstream signaling inputs, trans-acting TFs, and cis-regulatory elements. We apply HIGAN to understand the aberrant activation of the cytidine deaminase APOBEC3B, an intrinsic source of cancer hypermutation. We reveal that nuclear factor κB (NF-κB) and AP-1 pathways are the most salient trans-acting inputs, with minor roles for other inflammatory pathways. We identify a cis-regulatory architecture dominated by a major intronic enhancer that requires coordinated NF-κB and AP-1 activity with secondary inputs from distal regulatory regions. Our data demonstrate how integration of cis and trans genomic screening platforms provides a paradigm for building gene-centered regulatory networks. Utilizing multi-faceted functional genomics technologies, Lin et al. present a high-throughput pipeline to interrogate gene-centered activation networks. They perform in-depth profiling of cis- and trans-acting modules controlling the aberrant activation of the human cytidine deaminase APOBEC3B, revealing that AP-1 and nuclear factor κB (NF-κB) signaling coordinatively activate APOBEC3B through a strong intronic and weak distal enhancers.
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