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| Open AccessLncBRM initiates YAP1 signalling activation to drive self-renewal of liver cancer stem cells
Liver cancer stem cells (CSCs) may contribute to the high rate of recurrence of hepatocellular carcinoma. Here, the authors show that the long coding RNA, LcnBRM, regulates the self-renewal of liver CSCs and tumour initiation through binding to BAF complex thereby activating YAP1.
- Pingping Zhu
- , Yanying Wang
- & Zusen Fan
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Article
| Open AccessA feed-forward loop between lncARSR and YAP activity promotes expansion of renal tumour-initiating cells
Renal tumour-initiating cells (T-ICs) contribute to tumour initiation and progression. Here, the authors show that lncARSR regulates TICs by blocking LATS1-induced YAP phosphorylation facilitating YAP nuclear translocation, which promotes lncARSR transcription, thus forming a feed-forward circuit to promote TIC expansion.
- Le Qu
- , Zhenjie Wu
- & Linhui Wang
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Article
| Open AccessBmi1 marks distinct castration-resistant luminal progenitor cells competent for prostate regeneration and tumour initiation
The polycomb repressor protein Bmi1 has a role in self-renewal and tumorigenesis. Here, the authors use lineage tracing to show that Bmi-expressing cells are a distinct population of cells, primarily found in the luminal compartment, which is castration resistant, can initiate cancer and regenerate prostate.
- Young A. Yoo
- , Meejeon Roh
- & Sarki A. Abdulkadir
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Article
| Open AccessA regulatory circuit of miR-125b/miR-20b and Wnt signalling controls glioblastoma phenotypes through FZD6-modulated pathways
Glioblastoma (GBM) is classified as proneural (PN), neural, mesenchymal (MES) and classical GBM. Here the authors show that Wnt signalling, miR-125b and miR-20b establish a regulatory circuitry including FZD6 which distinguishes PN from the MES subtype.
- Tianzhi Huang
- , Angel A. Alvarez
- & Shi-Yuan Cheng
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Article
| Open AccessTNIK inhibition abrogates colorectal cancer stemness
TRAF2 and NCK-interacting protein kinase (TNIK) is a key regulatory component of the TCF4 and β-catenin transcriptional complex. In this study, the authors identify a TNIK inhibitor that blocks Wnt signalling and Wnt-driven colorectal tumorigenesis in mice.
- Mari Masuda
- , Yuko Uno
- & Tesshi Yamada
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Article
| Open AccessLncSox4 promotes the self-renewal of liver tumour-initiating cells through Stat3-mediated Sox4 expression
Liver tumour-initiating cells (TICs) may be responsible for liver cancer initiation and recurrence. In this article, the authors show that a previously unidentified lncRNA, LncSox4, is highly expressed in liver cancer TICs and regulates TIC self-renewal through the Stat3/SOX4 axis.
- Zhen-zhen Chen
- , Lan Huang
- & Yan-feng Gao
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Article
| Open AccessRole of SUMO activating enzyme in cancer stem cell maintenance and self-renewal
Cancer stem cells (CSCs) have key roles in tumor initiation and metastasis. Here, the authors show that the SUMO E1 and global sumoylation levels are high in colorectal CSCs and that depletion of the catalytic subunit of the SUMO E1, SAE2, affects CSCs self-renewal through TRIM21-mediated degradation of the Oct1, a transcription factor for ALDH.
- Li Du
- , Yi-Jia Li
- & Yuan Chen
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| Open AccessSuspension survival mediated by PP2A-STAT3-Col XVII determines tumour initiation and metastasis in cancer stem cells
Tumour initiating cells (TICs) are anoikis resistant in suspension culture and they are critical for initiating tumorigenesis in vivo. Here, the authors show that these features are promoted by hemidesmosome-like structures enriched in laminin V and collagen XVII 5 upregulated in TICs by phospho-STAT3 whose levels are increased through PP2A inactivation.
- Chen-Chi Liu
- , Shih-Pei Lin
- & Shih-Chieh Hung
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Article
| Open AccessDownregulation of TLX induces TET3 expression and inhibits glioblastoma stem cell self-renewal and tumorigenesis
TLX is a nuclear receptor essential for neural stem cell self-renewal and recently involved in glioblastoma development. In this study, the authors show that inhibition of TLX expression, achieved using a dendrimer nanovector-delivered siRNAs or viral vector-delivered shRNAs, reduces glioblastoma stem cells self renewal and in vivotumour growth through activation of TET3.
- Qi Cui
- , Su Yang
- & Yanhong Shi
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| Open AccessModel of fibrolamellar hepatocellular carcinomas reveals striking enrichment in cancer stem cells
With no cell lines available, investigating the aetiology of human fibrolamellar hepatocellular carcinomas (hFL-HCCs) has proved problematic. Here, Oikawa et al. establish a model of hFL-HCCs as a transplantable tumour line maintained in immune-compromised mice, which proves rich in cancer stem cells.
- Tsunekazu Oikawa
- , Eliane Wauthier
- & Lola M. Reid
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PBX3 is targeted by multiple miRNAs and is essential for liver tumour-initiating cells
α2δ1 is a marker of liver tumour-initiating cells. Here the authors show that PBX3 is necessary and sufficient for tumour initiation by α2δ1+ cells by regulating transcription of stemness genes, and that PBX3 is targeted by four miRNAs downregulated in α2δ1+ cells.
- Haibo Han
- , Yantao Du
- & Zhiqian Zhang
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Article
| Open AccessDipeptide species regulate p38MAPK–Smad3 signalling to maintain chronic myelogenous leukaemia stem cells
Chronic myelogenous leukaemia contains a stem cell fraction and targeting this population of cells is an attractive therapeutic strategy. Here, the authors demonstrate that the stem cells take up dipeptides and that inhibiting the dipeptide transporter could reduce the number of these stem cells in mice.
- Kazuhito Naka
- , Yoshie Jomen
- & Seong-Jin Kim
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| Open AccessLoss of microRNA-27b contributes to breast cancer stem cell generation by activating ENPP1
MicroRNAs have a role in the acquisition of stem cell-like properties of cancer cells. Here the authors show that microRNA-27b mediates generation of a side-population of breast cancer stem cells, in part by regulating the protein ENPP1, which has been previously linked to the development of diabetes.
- Ryou-u Takahashi
- , Hiroaki Miyazaki
- & Takahiro Ochiya
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Article
| Open AccessTryptophan derivatives regulate the transcription of Oct4 in stem-like cancer cells
The aryl hydrocarbon receptor, AhR, can regulate Oct4, which is often expressed in cancer stem cells and promotes pluripotency and tumorigenesis. Here, in cancer stem cells, AhR is shown to be activated by the tryptophan derivative ITE, which causes transcriptional repression of Oct4 and reduced tumorigenesis.
- Jie Cheng
- , Wenxin Li
- & Ying-Jie Wang
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Tie-mediated signal from apoptotic cells protects stem cells in Drosophila melanogaster
Some normal and cancer stem cells are resistant to killing by genotoxins, but the mechanism for this resistance is poorly understood. Here the authors show that adult stem cells inDrosophila melanogastergermline and midgut are resistant to genotoxic stimuli and find that this is mediated by signalling via the receptor tyrosine kinase Tie released from apoptotic cells.
- Yalan Xing
- , Tin Tin Su
- & Hannele Ruohola-Baker
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DNMT1 is essential for mammary and cancer stem cell maintenance and tumorigenesis
DNA methyltransferase1 (DNMT1) plays a key role in stem cell and progenitor cell maintenance in mammalian epithelium tissues. Here the authors uncover a role for DNMT1 in the regulation of stem/progenitor cells in normal and tumorigenic mouse mammary gland.
- Rajneesh Pathania
- , Sabarish Ramachandran
- & Muthusamy Thangaraju
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Sox2 antagonizes the Hippo pathway to maintain stemness in cancer cells
Transcriptional regulators Sox2 and YAP maintain expression of stemness genes in normal and cancerous cells. Here the authors show that, in osteosarcomas, Sox2 activates YAP by directly repressing transcription of its upstream negative regulators Nf2 and WWC1, promoting cancer cell stemness.
- Upal Basu-Roy
- , N. Sumru Bayin
- & Claudio Basilico
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Article |
CD95 and CD95L promote and protect cancer stem cells
The death receptor CD95/Fas induces apoptosis of many normal cells but prevents necrotic death of cancer cells. Here the authors demonstrate that CD95 activation promotes a cancer stem cell (CSC) phenotype, and that CSCs but not differentiated cancer cells are resistant to CD95-mediated apoptosis and depend on CD95 signalling to prevent necrosis.
- Paolo Ceppi
- , Abbas Hadji
- & Marcus E. Peter
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Sphingosine-1-phosphate promotes expansion of cancer stem cells via S1PR3 by a ligand-independent Notch activation
Many tumours originate from cancer stem cells (CSCs), a small population of cells that display stem cell properties. Here Kanda and colleagues show that the lipid mediator, sphingosine-1 phosphate (S1P), enhances expansion of ALDH-positive CSCs via S1P receptor 3 (S1PR3) and subsequent Notch activation, providing a rationale for targeting S1PR3 in cancer.
- Naoya Hirata
- , Shigeru Yamada
- & Yasunari Kanda
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Cancer-associated fibroblasts regulate the plasticity of lung cancer stemness via paracrine signalling
Cancer stem cells are a sub-population of tumour cells but how they interact with the tumour microenvironment is unclear. Here, Chen et al.culture lung cancer stem cells with cancer-associated fibroblasts and delineate a signalling pathway between the two cells that helps maintain the cancer stem cell state.
- Wan-Jiun Chen
- , Chao-Chi Ho
- & Pan-Chyr Yang
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Transcription factors FOXG1 and Groucho/TLE promote glioblastoma growth
Glioblastoma cancers contain brain tumour-initiating cells and targeting these specific cells is an attractive opportunity for therapy. In this study, the authors show that FOXG1 and Groucho/TLE transcription factors are important for glioblastoma growth and might be useful therapeutic targets.
- Federica Verginelli
- , Alessandro Perin
- & Stefano Stifani
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NF-κB non-cell-autonomously regulates cancer stem cell populations in the basal-like breast cancer subtype
Aggressive types of breast cancer often exhibit constitutive activation of the pro-inflammatory transcription factor NF-κB. Here, Yamamoto et al. show that, in basal-like breast cancer, NF-κB upregulates the Notch receptor ligand JAG1 in non-cancer stem cells and thereby induces proliferation of breast cancer stem cells.
- Mizuki Yamamoto
- , Yuu Taguchi
- & Jun-ichiro Inoue
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TGFβ induces the formation of tumour-initiating cells in claudinlow breast cancer
TGF-β signalling suppresses tumorigenesis in breast cancer cells but its effects on breast cancer initiating cells have not been reported. Using cells in culture, Brunaet al. show that TGF-β increases breast cancer initiating cell numbers in cells that have low levels of the tight junction protein claudin.
- Alejandra Bruna
- , Wendy Greenwood
- & Carlos Caldas