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Stem cell breast cancer

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https://www.readbyqxmd.com/read/28088791/sinomenine-hydrochloride-inhibits-breast-cancer-metastasis-by-attenuating-inflammation-related-epithelial-mesenchymal-transition-and-cancer-stemness
#1
Xiao Li, Pingping Li, Chao Liu, Yu Ren, Xiaojiang Tang, Ke Wang, Jianjun He
Sinomenine hydrochloride (SH) has been investigated for its anti-tumor growth effect. We have previously reported that SH inhibited breast cancer cell proliferation via MAPKs signaling. However, whether SH could inhibit tumor metastasis has not been fully explored. In this study, we found that SH suppressed the metastasis potential of breast cancer cells. The wound healing and transwell assays showed that SH inhibited the migration and invasion ability of both 4T1 and MDA-MB-231 breast cancer cells. The orthotopic mouse model of 4T1 and the experimental mouse model of MDA-MB-231-luc (MDA-MB-231 cell line expressing firefly luciferase) demonstrated that SH treatment inhibited breast cancer metastasis by inhibiting epithelial-mesenchymal transition (EMT) and cancer stem cell (CSC) properties without obvious hepatotoxicity and renal toxicity...
January 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28076950/single-amino-acid-variant-profiles-of-subpopulations-in-the-mcf-7-breast-cancer-cell-line
#2
Zhijing Tan, Song Nie, Sean P McDermott, Max S Wicha, David M Lubman
Cancers are initiated and developed from a small population of stem-like cells termed cancer stem cells (CSCs). There is heterogeneity among this CSC population that leads to multiple subpopulations with their own distinct biological features and protein expression. The protein expression and function may be impacted by amino acid variants that can occur largely due to single nucleotide changes. We have thus performed proteomic analysis of breast CSC subpopulations by mass spectrometry to study the presence of single amino acid variants (SAAVs) and their relation to breast cancer...
January 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28075453/mir-375-inhibits-cancer-stem-cell-phenotype-and-tamoxifen-resistance-by-degrading-hoxb3-in-human-er-positive-breast-cancer
#3
Hui Fu, Lei Fu, Chao Xie, Wen-Shu Zuo, Yan-Song Liu, Mei-Zhu Zheng, Jin-Ming Yu
Cancer stem cell (CSC) formation and epithelial-mesenchymal transition (EMT) are pivotal events in tumor cell invasion and metastasis. They have been shown to occur in resistance to tamoxifen. Moreover, microRNAs (miRNAs) have been associated with CSCs, EMT as well as tamoxifen resistance. Studying molecular mechanism of CSCs, EMT as well as tamoxifen resistance will help us to further understand the pathogenesis and progression of the disease and offer new targets for effective therapies. In the present study, we showed that miR-375 inhibits CSC traits in breast cancer MCF-7 cells...
January 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28069692/genes-involved-in-development-and-differentiation-are-commonly-methylated-in-cancers-derived-from-multiple-organs-a-single-institutional-methylome-analysis-using-1007-tissue-specimens
#4
Kentaro Ohara, Eri Arai, Yoriko Takahashi, Nanako Ito, Ayako Shibuya, Koji Tsuta, Ryoji Kushima, Hitoshi Tsuda, Hidenori Ojima, Hiroyuki Fujimoto, Shun-Ichi Watanabe, Hitoshi Katai, Takayuki Kinoshita, Tatsuhiro Shibata, Takashi Kohno, Yae Kanai
The aim of this study was to clarify the significance of DNA methylation alterations shared by cancers derived from multiple organs. We analyzed single-institutional methylome data by single-CpG-resolution Infinium assay for 1,007 samples of non-cancerous tissue (N) and corresponding cancerous tissue (T) obtained from lung, stomach, kidney, breast and liver. Principal component analysis revealed that N samples of each organ showed distinct DNA methylation profiles, DNA methylation profiles of N samples of each organ being inherited by the corresponding T samples and DNA methylation profiles of T samples being more similar to those of N samples in the same organ than those of T samples in other organs...
January 9, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28068668/the-hippo-kinases-lats1-and-2-control-human-breast-cell-fate-via-crosstalk-with-er%C3%AE
#5
Adrian Britschgi, Stephan Duss, Sungeun Kim, Joana Pinto Couto, Heike Brinkhaus, Shany Koren, Duvini De Silva, Kirsten D Mertz, Daniela Kaup, Zsuzsanna Varga, Hans Voshol, Alexandra Vissieres, Cedric Leroy, Tim Roloff, Michael B Stadler, Christina H Scheel, Loren J Miraglia, Anthony P Orth, Ghislain M C Bonamy, Venkateshwar A Reddy, Mohamed Bentires-Alj
Cell fate perturbations underlie many human diseases, including breast cancer. Unfortunately, the mechanisms by which breast cell fate are regulated are largely unknown. The mammary gland epithelium consists of differentiated luminal epithelial and basal myoepithelial cells, as well as undifferentiated stem cells and more restricted progenitors. Breast cancer originates from this epithelium, but the molecular mechanisms that underlie breast epithelial hierarchy remain ill-defined. Here, we use a high-content confocal image-based short hairpin RNA screen to identify tumour suppressors that regulate breast cell fate in primary human breast epithelial cells...
January 9, 2017: Nature
https://www.readbyqxmd.com/read/28068628/epoxy-clerodane-diterpene-inhibits-mcf-7-human-breast-cancer-cell-growth-by-regulating-the-expression-of-the-functional-apoptotic-genes-cdkn2a-rb1-mdm2-and-p53
#6
P Subash-Babu, Ghedeir M Alshammari, S Ignacimuthu, Ali A Alshatwi
Systematic analyses of plants that are used in traditional medicine may lead to the discovery of novel cytotoxic secondary metabolites. Diterpene possesses multiple bioactivities; here, epoxy clerodane diterpene (ECD) was isolated from Tinospora cordifolia (Willd.) stem and shown potential antiproliferative effect in MCF-7 human breast cancer cells. The antiproliferative effect of ECD on MCF-7 cells was systematically analyzed by cell and nuclear morphology, alterations in oxidative stress, and the expression of tumor suppressor and mitochondria-mediated apoptosis-related genes...
January 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28068325/trim28-interacts-with-ezh2-and-swi-snf-to-activate-genes-that-promote-mammosphere-formation
#7
J Li, Y Xi, W Li, R L McCarthy, S A Stratton, W Zou, W Li, S Y Dent, A K Jain, M C Barton
Histone methyl transferase EZH2 (Enhancer of Zeste Homolog 2) is generally associated with H3K27 methylation and gene silencing, as a member of the polycomb repressor 2 (PRC2) complex. Immunoprecipitation and mass spectrometry of the EZH2-protein interactome in estrogen receptor positive, breast cancer-derived MCF7 cells revealed EZH2 interactions with subunits of chromatin remodeler SWI/SNF complex and TRIM28, which formed a complex with EZH2 distinct from PRC2. Unexpectedly, transcriptome profiling showed that EZH2 primarily activates, rather than represses, transcription in MCF7 cells and with TRIM28 co-regulates a set of genes associated with stem cell maintenance and poor survival of breast cancer patients...
January 9, 2017: Oncogene
https://www.readbyqxmd.com/read/28068319/fbxo32-suppresses-breast-cancer-tumorigenesis-through-targeting-klf4-to-proteasomal-degradation
#8
H Zhou, Y Liu, R Zhu, F Ding, Y Wan, Y Li, Z Liu
Krüppel-like factor 4 (KLF4, GKLF) is a zinc-finger transcription factor involved in a large variety of cellular processes, including apoptosis, cell cycle progression, as well as stem cell renewal. KLF4 is critical for cell fate decision and has an ambivalent role in tumorigenesis. Emerging data keep reminding us that KLF4 dysregulation either facilitates or impedes tumor progression, making it important to clarify the regulating network of KLF4. Like most transcription factors, KLF4 has a rather short half-life within the cell and its turnover must be carefully orchestrated by ubiquitination and ubiquitin-proteasome system...
January 9, 2017: Oncogene
https://www.readbyqxmd.com/read/28066633/the-kinome-pathways-in-radioresistance-breast-cancer-stem-cells
#9
COMMENT
AbdulFattah Fararjeh, Yuan-Soon Ho
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28066560/targeting-tumorigenicity-of-breast-cancer-stem-like-cells-using-combination-epigenetic-therapy-something-old-and-something-new
#10
EDITORIAL
Yi Huang, Nancy E Davidson
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28064442/tumor-derived-spheroids-relevance-to-cancer-stem-cells-and-clinical-applications
#11
REVIEW
Tatsuya Ishiguro, Hirokazu Ohata, Ai Sato, Kaoru Yamawaki, Takayuki Enomoto, Koji Okamoto
Recently, many types of in vitro three-dimensional (3D) culture systems have been developed to recapitulate the in vivo growth conditions of cancer. The cancer 3D culture methods aim to preserve the biological characteristics of original tumors better than conventional two-dimensional (2D) monolayer cultures, and include tumor-derived organoids, tumor-derived spheroids, organotypic multicellular spheroids, and multicellular tumor spheroids. The 3D culture methods differ in terms of cancer cell sources, protocols for cell handling, and the required time intervals...
January 8, 2017: Cancer Science
https://www.readbyqxmd.com/read/28062556/the-cellular-origin-and-evolution-of-breast-cancer
#12
Mei Zhang, Adrian V Lee, Jeffrey M Rosen
In this review, we will discuss how the cell of origin may modulate breast cancer intratumoral heterogeneity (ITH) as well as the role of ITH in the evolution of cancer. The clonal evolution and the cancer stem cell (CSC) models, as well as a model that integrates clonal evolution with a CSC hierarchy, have all been proposed to explain the development of ITH. The extent of ITH correlates with clinical outcome and reflects the cellular complexity and dynamics within a tumor. A unique subtype of breast cancer, the claudin-low subtype that is highly resistant to chemotherapy and most closely resembles mammary epithelial stem cells, will be discussed...
January 6, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28061785/short-term-early-exposure-to-lapatinib-confers-lifelong-protection-from-mammary-tumor-development-in-mmtv-erbb-2-transgenic-mice
#13
Zhikun Ma, Amanda B Parris, Zhengzheng Xiao, Erin W Howard, Stanley D Kosanke, Xiaoshan Feng, Xiaohe Yang
BACKGROUND: Although chemopreventative agents targeting the estrogen/estrogen receptor (ER) pathway have been effective for ER(+) breast cancers, prevention of hormone receptor-negative breast cancers, such as Her2/erbB-2(+) breast cancers, remains a significant issue. Previous studies have demonstrated that administration of EGFR/erbB-2-targeting lapatinib to MMTV-erbB-2 transgenic mice inhibited mammary tumor development. The prevention, however, was achieved by prolonged high dose exposure...
January 6, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28061479/mir-24-induces-chemotherapy-resistance-and-hypoxic-advantage-in-breast-cancer
#14
Giuseppina Roscigno, Ilaria Puoti, Immacolata Giordano, Elvira Donnarumma, Valentina Russo, Alessandra Affinito, Assunta Adamo, Cristina Quintavalle, Matilde Todaro, Maria dM Vivanco, Gerolama Condorelli
Breast cancer remains one of the leading causes of cancer mortality among women. It has been proved that the onset of cancer depends on a very small pool of tumor cells with a phenotype similar to that of normal adult stem cells. Cancer stem cells (CSC) possess self-renewal and multilineage differentiation potential as well as a robust ability to sustain tumorigenesis. Evidence suggests that CSCs contribute to chemotherapy resistance and to survival under hypoxic conditions. Interestingly, hypoxia in turn regulates self-renewal in CSCs and these effects may be primarily mediated by hypoxic inducible factors (HIFs)...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28061448/targeting-basal-like-breast-tumors-with-bromodomain-and-extraterminal-domain-bet-and-polo-like-kinase-inhibitors
#15
Cristina Nieto-Jiménez, Ana Alcaraz-Sanabria, Javier Pérez-Peña, Verónica Corrales-Sánchez, Gemma Serrano-Heras, Eva M Galán-Moya, Leticia Serrano-Oviedo, Juan Carlos Montero, Miguel Burgos, Juan Llopis, Atanasio Pandiella, Alberto Ocaña
Metastatic triple negative breast cancer (TNBC) is an incurable disease with limited therapeutic options, and no targeted therapies available. Triple negative tumors and the basal-like genomic subtype, are both characterized by a high proliferation rate and an increase in cell division. In this context, protein kinases involved in the mitotic formation have a relevant role in this tumor subtype. Recently, Bromodomain and extraterminal domain (BET) inhibitors have shown to be active in this disease by modulating the expression of several transcription factors...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28058217/review-of-allogeneic-hematopoietic-stem-cell-transplantation-with-reduced-intensity-conditioning-in-solid-tumors-excluding-breast-cancer
#16
REVIEW
Nuri Karadurmus, Ugur Sahin, Bilgin Bahadir Basgoz, Fikret Arpaci, Taner Demirer
Solid tumors in adults constitute a heterogeneous group of malignancy originating from various organ systems. Solid tumors are not completely curable by chemotherapy, even though some subgroups are very chemo-sensitive. Recently, oncologists have focused on the use of allogeneic hematopoietic stem cell transplantation (allo-HSCT) with reduced intensity conditioning (RIC) for the treatment of some refractory solid tumors. After the demonstration of allogeneic graft-versus-leukemia effect in patients with hematological malignancies who received allo-HSCT, investigators evaluated this effect in patients with refractory metastatic solid tumors...
December 24, 2016: World Journal of Transplantation
https://www.readbyqxmd.com/read/28057845/targeting-the-epithelial-to-mesenchymal-transition-the-case-for-differentiation-based-therapy
#17
Diwakar R Pattabiraman, Robert A Weinberg
Although important strides have been made in targeted therapy for certain leukemias and subtypes of breast cancer, the standard of care for most carcinomas still involves chemotherapy, radiotherapy, surgery, or a combination of these. Two processes serve as obstacles to the successful treatment of carcinomas. First, a majority of deaths from these types of cancers occurs as a result of distant metastases and not the primary tumors themselves. Second, subsets of cells that are able to survive conventional therapy drive the aggressive relapse of the tumors, often in forms that are resistant to treatment...
January 5, 2017: Cold Spring Harbor Symposia on Quantitative Biology
https://www.readbyqxmd.com/read/28054666/cyclooxygenase-2-regulates-tgf%C3%AE-induced-cancer-stemness-in-triple-negative-breast-cancer
#18
Jun Tian, Mahmood Y Hachim, Ibrahim Y Hachim, Meiou Dai, Chieh Lo, Fatmah Al Raffa, Suhad Ali, Jean Jacques Lebrun
Triple negative breast cancer (TNBC), an aggressive subtype of breast cancer, display poor prognosis and exhibit resistance to conventional therapies, partly due to an enrichment in breast cancer stem cells (BCSCs). Here, we investigated the role of the cyclooxygenase-2 (COX-2), a downstream target of TGFβ, in regulating BCSCs in TNBC. Bioinformatics analysis revealed that COX-2 is highly expressed in TNBC and that its expression correlated with poor survival outcome in basal subtype of breast cancer. We also found TGFβ-mediated COX-2 expression to be Smad3-dependent and to be required for BCSC self-renewal and expansion in TNBCs...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28052658/laminin-modulates-the-stem-cell-population-in-lm05-e-murine-breast-cancer-cells-through-the-activation-of-the-mapk-erk-pathway
#19
Damián E Berardi, Diego Raffo, Laura B Todaro, Marina Simian
Purpose: We investigated the effects of laminin on the fraction of cells with self-renewing capacity in the estrogen-dependent, tamoxifen-sensitive LM05-E breast cancer cell line. We also determined whether laminin affected the response to tamoxifen. Materials and Methods: The LM05-E breast cancer cell line was used as a model for all experiments. Aldehyde dehydrogenase (ALDH) activity, clonogenic and mammosphere assays were performed to measure the effects of laminin on modulation of the stem cell subpopulation...
December 6, 2016: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28052035/brca1-iris-overexpression-promotes-and-maintains-the-tumor-initiating-phenotype-implications-for-triple-negative-breast-cancer-early-lesions
#20
Abhilasha Sinha, Bibbin T Paul, Lisa M Sullivan, Hillary Sims, Ahmed El Bastawisy, Hend F Yousef, Abdel-Rahman N Zekri, Abeer A Bahnassy, Wael M ElShamy
Tumor-initiating cells (TICs) are cancer cells endowed with self-renewal, multi-lineage differentiation, increased chemo-resistance, and in breast cancers the CD44+/CD24-/ALDH1+ phenotype. Triple negative breast cancers show lack of BRCA1 expression in addition to enhanced basal, epithelial-to-mesenchymal transition (EMT), and TIC phenotypes. BRCA1-IRIS (hereafter IRIS) is an oncogene produced by the alternative usage of the BRCA1 locus. IRIS is involved in induction of replication, transcription of selected oncogenes, and promoting breast cancer cells aggressiveness...
December 29, 2016: Oncotarget
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