Abstract:
BACKGROUND:Breast cancer stem cells (BCSCs) are typically seed cells of breast tumor that initiate and maintain tumor growth. MiR-7, as a cancer inhibitor, decreases the BCSC subset and inhibits tumor progression through mechanisms that remain unknown. METHODS:We examined miR-7 expression in breast cancer and developed a BCSC-driven xenograft mouse model, to evaluate the effects of miR-7 overexpression on the decrease of the BCSC subset in vitro and in vivo. In addition, we determined how miR-7 decreased the BCSC subset by using the ALDEFLUOR, lentivirus infection, dual-luciferase reporter, and chromatin immunoprecipitation-PCR assays. RESULTS:MiR-7 was expressed at low levels in breast cancer tissues compared with normal tissues, and overexpression of miR-7 directly inhibited lncRNA XIST, which mediates the transcriptional silencing of genes on the X chromosome, and reduced epithelium-specific antigen (ESA) expression by increasing miR-92b and inhibiting slug. Moreover, miR-7 suppressed CD44 and ESA by directly inhibiting the NF-κB subunit RELA and slug in breast cancer cell lines and in BCSC-driven xenografts, which confirmed the antitumor activity in mice injected with miR-7 agomir or stably infected with lenti-miR-7. CONCLUSIONS:The findings from this study uncover the molecular mechanisms by which miR-7 inhibits XIST, modulates the miR-92b/Slug/ESA axis, and decreases the RELA and CD44 expression, resulting in a reduced BCSC subset and breast cancer growth inhibition. These findings suggest a potentially targeted treatment approach to breast cancer.
journal_name
Breast Cancer Resjournal_title
Breast cancer research : BCRauthors
Li M,Pan M,You C,Zhao F,Wu D,Guo M,Xu H,Shi F,Zheng D,Dou Jdoi
10.1186/s13058-020-01264-zsubject
Has Abstractpub_date
2020-03-06 00:00:00pages
26issue
1eissn
1465-5411issn
1465-542Xpii
10.1186/s13058-020-01264-zjournal_volume
22pub_type
杂志文章abstract:INTRODUCTION:The ataxia telangiectasia mutated (ATM) gene is a tumor suppressor gene with functions in cell cycle arrest, apoptosis, and repair of DNA double-strand breaks. Based on family studies, women heterozygous for mutations in the ATM gene are reported to have a fourfold to fivefold increased risk of breast canc...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr809
更新日期:2004-01-01 00:00:00
abstract::It is generally accepted that early detection of breast cancer has great impact on patient survival, emphasizing the importance of early diagnosis. In a widely recognized model of breast cancer development, tumor cells progress through chronological and well defined stages. However, the molecular basis of disease prog...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,评审
doi:10.1186/bcr1528
更新日期:2006-01-01 00:00:00
abstract:INTRODUCTION:Metastasis is the main cause of breast cancer morbidity and mortality. Processes that allow for tumor cell migration and invasion are important therapeutic targets. Here we demonstrate that receptor-interacting protein kinase 2 (RIP2), a kinase known to be involved in inflammatory processes, also has novel...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr3629
更新日期:2014-03-19 00:00:00
abstract:BACKGROUND:Acquirement of resistance is always associated with a highly aggressive phenotype of tumor cells. Recent studies have revealed that Annexin A2 (Anxa2) is a key protein that links drug resistance and cancer metastasis. A high level of Anxa2 in cancer tissues is correlated to a highly aggressive phenotype. Inc...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-019-1147-7
更新日期:2019-05-22 00:00:00
abstract::Genome-wide expression microarray studies have revealed that the biological and clinical heterogeneity of breast cancer can be partly explained by information embedded within a complex but ordered transcriptional architecture. Comprising this architecture are gene expression networks, or signatures, reflecting biochem...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,评审
doi:10.1186/bcr1662
更新日期:2007-01-01 00:00:00
abstract::Hypoxia-inducible factor-1 (HIF), which is centrally involved in physiological oxygen homeostasis, is also activated in the majority of tumours. Activation of HIF can occur through genetic mechanisms or as a result of hypoxia within the tumour microenvironment. In some cases HIF activation appears to be intimately lin...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,评审
doi:10.1186/bcr313
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:A novel line of research suggests that eating at nighttime may have several metabolic consequences that are highly relevant to breast cancer. We investigated the association between nighttime eating habits after 10 p.m. and breast cancer in Hong Kong women. METHODS:A hospital-based case-control study was co...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-017-0821-x
更新日期:2017-03-17 00:00:00
abstract:INTRODUCTION:Mammographic density is one of the strongest risk factors for breast cancer and is believed to represent epithelial and stromal proliferation. Because of the high heritability of breast density, and the role of the insulin-like growth factor (IGF) pathway in cellular proliferation and breast development, w...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr1655
更新日期:2007-01-01 00:00:00
abstract:INTRODUCTION:Triple-negative breast cancer (TNBC) is a subtype of highly malignant breast cancer with poor prognosis. TNBC is not amenable to endocrine therapy and often exhibit resistance to current chemotherapeutic agents, therefore, further understanding of the biological properties of these cancer cells and develop...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-014-0434-6
更新日期:2014-09-11 00:00:00
abstract:BACKGROUND:Mesenchymal transformation of pulmonary endothelial cells contributes to the formation of a metastatic microenvironment, but it is not known whether this precedes or follows early metastasis formation. In the present work, we characterize the development of nitric oxide (NO) deficiency and markers of endothe...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-018-1013-z
更新日期:2018-08-03 00:00:00
abstract:INTRODUCTION:We sought to review the available evidence regarding the effect of psychosocial factors on the survival of breast cancer patients. METHODS:We systematically searched the PubMed and PsycINFO databases to identify relevant studies. RESULTS:We identified 31 studies examining the association of various psych...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,meta分析
doi:10.1186/bcr1744
更新日期:2007-01-01 00:00:00
abstract:INTRODUCTION:The HER (human EGFR related) family of receptor tyrosine kinases (HER1/EGFR (epidermal growth factor receptor)/c-erbB1, HER2/c-erbB2, HER3/c-erbB3 and HER4/c-erbB4) shares a high degree of structural and functional homology. It constitutes a complex network, coupling various extracellular ligands to intrac...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr1843
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Chemotherapy is the standard treatment for breast cancer; however, the response to chemotherapy is disappointingly low. Here, we investigated the alternative therapeutic efficacy of novel combination treatment with necroptosis-inducing small molecules to overcome chemotherapeutic resistance in tyrosine amino...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-020-01367-7
更新日期:2020-11-25 00:00:00
abstract:INTRODUCTION:Human epidermal growth factor 2 (Her2), a receptor tyrosine kinase, is overexpressed in breast cancers. It has been successfully targeted by small molecule kinase inhibitors and by antibodies. Recent clinical data show a synergistic response in patients when two antibodies, trastuzumab and pertuzumab, are ...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr2888
更新日期:2011-05-22 00:00:00
abstract:BACKGROUND:Breast cancer is a heterogeneous disease. Hence, stratification of patients based on the subtype of breast cancer is key to its successful treatment. Among all the breast cancer subtypes, basal-like breast cancer is the most aggressive subtype with limited treatment options. Interestingly, we found focal adh...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-020-01298-3
更新日期:2020-06-03 00:00:00
abstract:INTRODUCTION:Pre-clinical data suggest p53-dependent anthracycline-induced apoptosis and p53-independent taxane activity. However, dedicated clinical research has not defined a predictive role for TP53 gene mutations. The aim of the current study was to retrospectively explore the prognosis and predictive values of TP5...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,随机对照试验
doi:10.1186/bcr3179
更新日期:2012-05-02 00:00:00
abstract::Breast cancer arises from multiple genetic events that together contribute to the established, irreversible malignant phenotype. The development of inducible tissue-specific transgenics has allowed a careful dissection of the events required for induction and subsequent maintenance of tumorigenesis. Mammary gland targ...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr297
更新日期:2001-01-01 00:00:00
abstract::Certain laminins of vascular basement membranes have been identified in human breast tumors and brain gliomas that share the same beta1 chain. These laminins are new carcinoma angiogenic markers and might represent potential targets for antiangiogenic therapy. ...
journal_title:Breast cancer research : BCR
pub_type: 评论,杂志文章
doi:10.1186/bcr1270
更新日期:2005-01-01 00:00:00
abstract:INTRODUCTION:Before any new methodology can be introduced into the routine diagnostic setting it must be technically validated against the established standards. To this end, a ring study involving five international pathology laboratories was initiated to validate chromogenic in situ hybridisation (CISH) against fluor...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,多中心研究
doi:10.1186/bcr1776
更新日期:2007-01-01 00:00:00
abstract:INTRODUCTION:AIB1, located at 20q12, is a member of the steroid hormone coactivator family. It contains a glutamine repeat (CAG/CAA) polymorphism at its carboxyl-terminal region that may alter the transcriptional activation of the receptor and affect susceptibility to breast cancer through altered sensitivity to hormon...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr1009
更新日期:2005-01-01 00:00:00
abstract:INTRODUCTION:Endocrine therapies target oestrogenic stimulation of breast cancer (BC) growth, but resistance remains problematic. Our aims in this study were (1) to identify genes most strongly associated with resistance to endocrine therapy by intersecting global gene transcription data from patients treated presurgic...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-014-0447-1
更新日期:2014-10-31 00:00:00
abstract::High mammographic density is the most important risk factor for breast cancer, after ageing. However, the composition, architecture, and mechanical properties of high X-ray density soft tissues, and the causative mechanisms resulting in different mammographic densities, are not well described. Moreover, it is not know...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,评审
doi:10.1186/s13058-016-0701-9
更新日期:2016-05-03 00:00:00
abstract:INTRODUCTION:Aberrant expression of the embryonic stem cell marker Sox2 has been reported in breast cancer (BC). We previously identified two phenotypically distinct BC cell subsets separated based on their differential response to a Sox2 transcription activity reporter, namely the reporter-unresponsive (RU) and the mo...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-014-0470-2
更新日期:2014-11-08 00:00:00
abstract:INTRODUCTION:Reliable predictive and prognostic markers for routine diagnostic purposes are needed for breast cancer patients treated with neoadjuvant chemotherapy. We evaluated protein biomarkers in a cohort of 116 participants of the GeparDuo study on anthracycline/taxane-based neoadjuvant chemotherapy for operable b...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1186/bcr2363
更新日期:2009-01-01 00:00:00
abstract::High-throughput screening is an essential component of the toolbox of modern technologies that improve speed and efficiency in contemporary cancer drug development. This is particularly important as we seek to exploit, for maximum therapeutic benefit, the large number of new molecular targets emerging from the Human G...
journal_title:Breast cancer research : BCR
pub_type: 社论
doi:10.1186/bcr440
更新日期:2002-01-01 00:00:00
abstract:BACKGROUND:Controversies exist as to whether the genetic polymorphisms of the enzymes responsible for the metabolism of tamoxifen can predict breast cancer outcome in patients using adjuvant tamoxifen. Direct measurement of concentrations of active tamoxifen metabolites in serum may be a more biological plausible and r...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-017-0916-4
更新日期:2017-11-28 00:00:00
abstract:BACKGROUND:Inflammation is an important candidate mechanism underlying cancer and cancer treatment-related cognitive impairment. We investigated levels of blood cell-based inflammatory markers in breast cancer survivors on average 20 years after chemotherapy and explored the relation between these markers and global co...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-018-1062-3
更新日期:2018-11-15 00:00:00
abstract:INTRODUCTION:Estrogen forms a complex with the estrogen receptor (ER) that binds to estrogen response elements (EREs) in the regulatory region of estrogen-responsive genes and regulates their transcription. Sequence variants in the regulatory regions have the potential to affect the transcription factor-regulatory sequ...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/s13058-014-0455-1
更新日期:2014-10-09 00:00:00
abstract:INTRODUCTION:Recent studies have demonstrated that members of the GATA-binding protein (GATA) family (GATA4 and GATA5) might have pivotal roles in the transcriptional upregulation of mucin genes (MUC2, MUC3 and MUC4) in gastrointestinal epithelium. The zinc-finger GATA3 transcription factor has been reported to be invo...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr1617
更新日期:2006-01-01 00:00:00
abstract:INTRODUCTION:The majority of breast cancers that occur in BRCA1 mutation carriers (BRCA1 carriers) are estrogen receptor-negative (ER-). Therefore, it has been suggested that ER negativity is intrinsic to BRCA1 cancers and reflects the cell of origin of these tumors. However, approximately 20% of breast cancers that de...
journal_title:Breast cancer research : BCR
pub_type: 杂志文章
doi:10.1186/bcr2776
更新日期:2010-01-01 00:00:00