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Co-regulation and function of FOXM1 / RHNO1 bidirectional genes in cancer.

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TLDR
This paper showed that RHNO1 and FOXM1 are head-to-head (i.e., bidirectional) genes (BDG) regulated by a BDP (named F/R-BDP), which is a potential therapeutic approach for ovarian and other cancers.
Abstract
The FOXM1 transcription factor is an oncoprotein and a top biomarker of poor prognosis in human cancer. Overexpression and activation of FOXM1 is frequent in high-grade serous carcinoma (HGSC), the most common and lethal form of human ovarian cancer, and is linked to copy number gains at chromosome 12p13.33. We show that FOXM1 is co-amplified and co-expressed with RHNO1, a gene involved in the ATR-Chk1 signaling pathway that functions in the DNA replication stress response. We demonstrate that FOXM1 and RHNO1 are head-to-head (i.e., bidirectional) genes (BDG) regulated by a bidirectional promoter (BDP) (named F/R-BDP). FOXM1 and RHNO1 each promote oncogenic phenotypes in HGSC cells, including clonogenic growth, DNA homologous recombination repair, and poly-ADP ribosylase inhibitor resistance. FOXM1 and RHNO1 are one of the first examples of oncogenic BDG, and therapeutic targeting of FOXM1/RHNO1 BDG is a potential therapeutic approach for ovarian and other cancers.

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Journal ArticleDOI

FOXM1: A Multifunctional Oncoprotein and Emerging Therapeutic Target in Ovarian Cancer.

TL;DR: Forkhead box M1 (FOXM1) is a member of the conserved forkhead box (FOX) transcription factor family and has been shown to promote critical oncogenic phenotypes in ovarian cancer, including cell proliferation, invasion and metastasis, chemotherapy resistance, cancer stem cell (CSC) properties, genomic instability and altered cellular metabolism as discussed by the authors.
Journal ArticleDOI

The Pan-Cancer Multi-Omics Landscape of FOXO Family Relevant to Clinical Outcome and Drug Resistance

TL;DR: In this article , the authors evaluated the expression, prognostic value, mutation, methylation, and clinical features of four FOXO family genes (FOXO1, FOXO3,FOXO4, and FOXO6) in 33 types of cancers based on the Cancer Genome Atlas (TCGA) and Genotype Tissue Expression (GTEx) databases.
Journal ArticleDOI

Spirocyclic dimer SpiD7 activates the unfolded protein response to selectively inhibit growth and induce apoptosis of cancer cells

TL;DR: In this article , a spirocyclic dimer, SpiD7, was identified and evaluated its effects on UPR activation signals, that is, XBP1 splicing, phosphorylation of eIF2α, and a decrease in ATF 6 levels, in normal and cancer cells, which were further confirmed by RNA-Seq analyses.
Journal ArticleDOI

SOCS7/HuR/FOXM1 signaling axis inhibited high-grade serous ovarian carcinoma progression

TL;DR: In this article , the authors investigated the functions and mechanisms of suppressors of cytokine signaling 7 (SOCS7) in HGSOC and found that SOCS7 acted as a suppressor by inhibiting cancer cell viability and tumor growth in vivo.
References
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Journal ArticleDOI

The presence of extra chromosomes leads to genomic instability.

TL;DR: It is shown that gain of a single chromosome increases genomic instability, thereby promoting genomic instability and possibly contributing to tumorigenesis, and that restoring near-wild-type levels of chromatin-bound MCM helicase partly rescues the genomic instability phenotypes.
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A DNA Damage Response Screen Identifies RHINO, a 9-1-1 and TopBP1 Interacting Protein Required for ATR Signaling

TL;DR: It is suggested that RHINO functions together with the 9-1-1 complex and TopBP1 to fully activate ATR, and uncovered a critical role for Fanconi anemia and homologous recombination proteins in ATR (ataxia telangiectasia and Rad3-related) signaling.
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An intrinsic S/G2 checkpoint enforced by ATR

TL;DR: It is shown that cells transactivate the mitotic gene network as they exit the S phase through a CDK1 (cyclin-dependent kinase 1)–directed FOXM1 phosphorylation switch, which couples DNA replication with mitosis and preserves genome integrity by enforcing an S/G2 checkpoint.
Journal ArticleDOI

The Forkhead Transcription Factor FOXM1 Controls Cell Cycle-Dependent Gene Expression through an Atypical Chromatin Binding Mechanism

TL;DR: A novel and unexpected mode of chromatin binding of a FOX transcription factor that allows it to specifically control cell cycle-dependent gene expression is uncovered.
Journal ArticleDOI

FoxM1 dances with mitosis.

TL;DR: Identification of the nuclear protein CENP-F as a transcriptional target of FoxM1 reveals how it can also regulate the spindle assembly checkpoint, thereby ensuring proper chromosome stability and segregation during mitosis.
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