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LncRNA REG1CP promotes tumorigenesis through an enhancer complex to recruit FANCJ helicase for REG3A transcription

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posted on 2025-05-08, 23:47 authored by Hamed Yari, Lei JinLei Jin, Liu Teng, Yufang Wang, Yongyan Wu, Guang Zhi Liu, Wei Gao, Jin Liang, Yanfeng Xi, Yuchen Feng, Chunming Zhang, Yuanyuan ZhangYuanyuan Zhang, Hessam Tabatabaee, Ting La, Rui Hong Yang, Fu Hua Wang, Xu Yan, Margaret Farrelly, Rodney ScottRodney Scott, Tao Liu, Rick F. Thorne, Su Tang Guo, Xu Dong ZhangXu Dong Zhang
Protein products of the regenerating islet-derived (REG) gene family are important regulators of many cellular processes. Here we functionally characterise a non-protein coding product of the family, the long noncoding RNA (lncRNA) REG1CP that is transcribed from a DNA fragment at the family locus previously thought to be a pseudogene. REG1CP forms an RNA–DNA triplex with a homopurine stretch at the distal promoter of the REG3A gene, through which the DNA helicase FANCJ is tethered to the core promoter of REG3A where it unwinds double stranded DNA and facilitates a permissive state for glucocorticoid receptor α (GRα)-mediated REG3A transcription. As such, REG1CP promotes cancer cell proliferation and tumorigenicity and its upregulation is associated with poor outcome of patients. REG1CP is also transcriptionally inducible by GRα, indicative of feedforward regulation. These results reveal the function and regulation of REG1CP and suggest that REG1CP may constitute a target for cancer treatment.

Funding

NHMRC

APP1147271

History

Journal title

Nature Communications

Volume

10

Article number

5334

Publisher

Nature Publishing Group

Language

  • en, English

College/Research Centre

Faculty of Health and Medicine

School

School of Biomedical Sciences and Pharmacy

Rights statement

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