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https://www.readbyqxmd.com/read/28076950/single-amino-acid-variant-profiles-of-subpopulations-in-the-mcf-7-breast-cancer-cell-line
#1
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/28061785/short-term-early-exposure-to-lapatinib-confers-lifelong-protection-from-mammary-tumor-development-in-mmtv-erbb-2-transgenic-mice
#2
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/28054666/cyclooxygenase-2-regulates-tgf%C3%AE-induced-cancer-stemness-in-triple-negative-breast-cancer
#3
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
#4
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/28040834/aldehyde-dehydrogenase-activity-plays-no-functional-role-in-stem-cell-like-properties-in-anaplastic-thyroid-cancer-cell-lines
#5
Mika Shimamura, Tomomi Kurashige, Norisato Mitsutake, Yuji Nagayama
Recent studies have revealed that aldehyde dehydrogenase (ALDH) is a candidate marker for thyroid cancer stem cells, although its activity is flexible. The goal of this study is to clarify the functional significance of ALDH enzymatic activity on thyroid cancer stem cells properties in anaplastic thyroid cancer cell lines. In vitro sphere formation assay was used to judge the stemness of 4 anaplastic thyroid cancer cell lines (FRO, ACT1, 8505C, and KTC3). Two well-known ALDH inhibitors, N,N-diethylaminobenzaldehyde (DEAB) and disulfiram (DS), were first used...
December 31, 2016: Endocrine
https://www.readbyqxmd.com/read/28012234/hypoxia-promotes-the-phenotypic-change-of-aldehyde-dehydrogenase-activity-of-breast-cancer-stem-cells
#6
Akira Shiraishi, Kana Tachi, Nesrine Essid, Ikki Tsuboi, Masumi Nagano, Toshiki Kato, Toshiharu Yamashita, Hiroko Bando, Hisato Hara, Osamu Ohneda
Stable breast cancer cell (BCC) lines are valuable tools for the identification of breast cancer stem cell (BCSC) phenotypes that develop in response to several stimuli as well as for studying the basic mechanisms associated with the initiation and maintenance of BCSCs. However, the characteristics of individual, BCC-derived BCSCs varies and these cells show distinct phenotypes depending on the different BCSC markers used for their isolation. Aldehyde dehydrogenase (ALDH) activity is just such a recognized biomarker of BCSCs with a CD44(+) /CD24(-) phenotype...
December 23, 2016: Cancer Science
https://www.readbyqxmd.com/read/28002789/microrna-17-is-downregulated-in-esophageal-adenocarcinoma-cancer-stem-like-cells-and-promotes-a-radioresistant-phenotype
#7
Niamh Lynam-Lennon, Susan Heavey, Gary Sommerville, Becky A S Bibby, Brendan Ffrench, Jennifer Quinn, Claudia Gasch, John J O'Leary, Michael F Gallagher, John V Reynolds, Stephen G Maher
Resistance to neoadjuvant chemoradiation therapy (CRT) remains a critical barrier to the effective treatment of esophageal adenocarcinoma (EAC). Cancer stem-like cells (CSCs) are a distinct subpopulation of cells implicated in the resistance of tumors to anti-cancer therapy. However, their role in the resistance of EAC to CRT is largely unknown. In this study, using a novel in vitro isogenic model of radioresistant EAC, we demonstrate that radioresistant EAC cells have enhanced tumorigenicity in vivo, increased expression of CSC-associated markers and enhanced holoclone forming ability...
December 15, 2016: Oncotarget
https://www.readbyqxmd.com/read/27999190/leptin-notch-signaling-axis-is-involved-in-pancreatic-cancer-progression
#8
Adriana Harbuzariu, Antonio Rampoldi, Danielle S Daley-Brown, Pierre Candelaria, Tia L Harmon, Crystal C Lipsey, Derrick J Beech, Alexander Quarshie, Gabriela Oprea Ilies, Ruben R Gonzalez-Perez
Pancreatic cancer (PC) shows a high death rate. PC incidence and prognosis are affected by obesity, a pandemic characterized by high levels of leptin. Notch is upregulated by leptin in breast cancer. Thus, leptin and Notch crosstalk could influence PC progression. Here we investigated in PC cell lines (BxPC-3, MiaPaCa-2, Panc-1, AsPC-1), derived tumorspheres and xenografts whether a functional leptin-Notch axis affects PC progression and expansion of pancreatic cancer stem cells (PCSC). PC cells and tumorspheres were treated with leptin and inhibitors of Notch (gamma-secretase inhibitor, DAPT) and leptin (iron oxide nanoparticle-leptin peptide receptor antagonist 2, IONP-LPrA2)...
December 15, 2016: Oncotarget
https://www.readbyqxmd.com/read/27976863/development-of-highly-selective-fluorescent-probe-enabling-flow-cytometric-isolation-of-aldh3a1-positive-viable-cells
#9
Atsushi Yagishita, Tasuku Ueno, Hiroyasu Esumi, Hideyuki Saya, Kazuhiro Kaneko, Katsuya Tsuchihara, Yasuteru Urano
Aldehyde dehydrogenase (ALDH) is overexpressed in some subpopulations of stem cells and cancer cells. We have designed and synthesized the first selective fluorescent probe for class 3 ALDH (ALDH3A1). This probe enabled the visualization of ALDH3A1-positive cells by fluorescence microscopy as well as flow-cytometric isolation of ALDH3A1-positive viable cells from a human Caucasian esophageal squamous cell line (OE21) that heterogeneously expresses ALDH3A1.
December 15, 2016: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/27974675/nedd9-may-regulate-hepatocellular-carcinoma-cell-metastasis-by-promoting-epithelial-mesenchymal-transition-and-stemness-via-repressing-smad7
#10
Zhipeng Wang, Min Shen, Peng Lu, Xiao Li, Shaojun Zhu, Shuqiang Yue
Overexpression of neural precursor cell expressed, developmentally downregulated 9 (NEDD9) is a prognostic marker of many cancers, including hepatocellular carcinoma (HCC). However, the functions and mechanisms of NEDD9 are unclear. We found that upregulation of NEDD9 promoted migration, invasion and cell-to-extracellular matrix adhesion of HCC cells. NEDD9 also induced the epithelial-mesenchymal transition (EMT) and expression of matrix metalloprotein 2 (MMP2). Increased aldehyde dehydrogenase (ALDH) activity and CD133-positive cells were observed in HCC cells with high expression of NEDD9, corresponding to greater sphere formation in cancer stem cells (CSCs)...
December 10, 2016: Oncotarget
https://www.readbyqxmd.com/read/27973444/differential-cytotoxic-potential-of-silver-nanoparticles-in-human-ovarian-cancer-cells-and-ovarian-cancer-stem-cells
#11
Yun-Jung Choi, Jung-Hyun Park, Jae Woong Han, Eunsu Kim, Oh Jae-Wook, Seung Yoon Lee, Jin-Hoi Kim, Sangiliyandi Gurunathan
The cancer stem cell (CSC) hypothesis postulates that cancer cells are composed of hierarchically-organized subpopulations of cells with distinct phenotypes and tumorigenic capacities. As a result, CSCs have been suggested as a source of disease recurrence. Recently, silver nanoparticles (AgNPs) have been used as antimicrobial, disinfectant, and antitumor agents. However, there is no study reporting the effects of AgNPs on ovarian cancer stem cells (OvCSCs). In this study, we investigated the cytotoxic effects of AgNPs and their mechanism of causing cell death in A2780 (human ovarian cancer cells) and OvCSCs derived from A2780...
December 12, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27942929/use-of-retinoic-acid-aldehyde-dehydrogenase-pathway-as-potential-targeted-therapy-against-cancer-stem-cells
#12
REVIEW
Jan S Moreb, Deniz A Ucar-Bilyeu, Abdullah Khan
A large number of studies have investigated possible drug resistance mechanisms of cancer cells and suggested strategies to overcome it. In this review, we outline the role and function of aldehyde dehydrogenase (ALDH) activity in multiple cellular functions and in cancer stem cells (CSCs) and focus on the role of retinoic acid (RA), one of the products of ALDH isozymes. We discuss our observation that ATRA and other RAs can suppress ALDH activity and decrease different ALDH isozyme proteins and result in detrimental effects on cell proliferation, invasion and chemotherapy sensitivity...
December 10, 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/27927191/somatostatin-signaling-via-sstr1-contributes-to-the-quiescence-of-colon-cancer-stem-cells
#13
Shirin R Modarai, Lynn M Opdenaker, Vignesh Viswanathan, Jeremy Z Fields, Bruce M Boman
BACKGROUND: Neuroendocrine cells (NECs) reside adjacent to colonic stem cells (SCs) in the crypt stem cell (SC) niche, but how NECs are involved in regulation of SCs is unclear. We investigated NECs expressing somatostatin (SST) and somatostatin receptor type 1 (SSTR1) because SST inhibits intestinal proliferation. HYPOTHESIS: SSTR1 cells maintain SCs in a quiescent state, and aberrant SST signaling contributes to SC overpopulation in colorectal cancer (CRC). METHODS: The proportion of SCs to NECs cells was quantified, by flow cytometry, in CRC cell lines and primary normal/tumor tissues based on cellular ALDH and SSTR1 levels, respectively...
December 7, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27926488/blocking-ezh2-methylation-transferase-activity-by-gsk126-decreases-stem-cell-like-myeloma-cells
#14
Delong Zeng, Maoxing Liu, Jingxuan Pan
EZH2 is a critical epigenetic regulator that is deregulated in various types of cancers including multiple myeloma (MM). In the present study, we hypothesized that targeting EZH2 might induce apoptosis in myeloma cells including stem cell-like cells (CSCs). We investigated the effect of EZH2 inhibition on MM cells using a potent inhibitor (GSK126). The results showed that GSK126 effectively abrogated the methylated histone 3 (H3K27me3) level in MM.1S and LP1 cells, and inhibited the number of live cells and colony formation in soft agar of six MM cell lines...
December 2, 2016: Oncotarget
https://www.readbyqxmd.com/read/27917791/investigation-of-the-expression-of-rif1-gene-on-head-and-neck-pancreatic-and-brain-cancer-and-cancer-stem-cells
#15
Hacer E GursesCila, Muradiye Acar, Furkan B Barut, Mehmet Gunduz, Reidar Grenman, Esra Gunduz
PURPOSE: Recent studies have shown that cancer stem cells are resistant to chemotherapy. The aim of this study was to compare RIF1 gene expression in head and neck, pancreatic cancer and glioma cell lines and the cancer stem cells isolated from these cell lines. METHODS: UT-SCC-74 from Turku University and UT-SCC-74B primary tumor metastasis and neck cancer cell lines, YKG-1 glioma cancer cell line from RIKEN, pancreatic cancer cell lines and ASPC-1 cells from ATCC were grown in cell culture...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
https://www.readbyqxmd.com/read/27910892/dynamic-microenvironment-induces-phenotypic-plasticity-of-esophageal-cancer-cells-under-flow
#16
Gizem Calibasi Kocal, Sinan Güven, Kira Foygel, Aaron Goldman, Pu Chen, Shiladitya Sengupta, Ramasamy Paulmurugan, Yasemin Baskin, Utkan Demirci
Cancer microenvironment is a remarkably heterogeneous composition of cellular and non-cellular components, regulated by both external and intrinsic physical and chemical stimuli. Physical alterations driven by increased proliferation of neoplastic cells and angiogenesis in the cancer microenvironment result in the exposure of the cancer cells to elevated levels of flow-based shear stress. We developed a dynamic microfluidic cell culture platform utilizing eshopagael cancer cells as model cells to investigate the phenotypic changes of cancer cells upon exposure to fluid shear stress...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27904609/deciphering-biological-characteristics-of-tumorigenic-subpopulations-in-human-colorectal-cancer-reveals-cellular-plasticity
#17
Hamed Mirzaei, Hossein Salehi, Amirhossein Sahebkar, Amir Avan, Mahmoud Reza Jaafari, Afshin Namdar, Abbas Rezaei, Hamid Reza Mirzaei
BACKGROUND: It is supposed that human colorectal cancer consists of a phenotypically distinct population of tumorigenic cancer cells known as cancer stem cells (CSCs) which play a pivotal role in cancer progression, maintenance, metastasis, and the relapse. The aim of this effort was to investigate and compare biological characterizations of CD133(+) with CD133(-) cell subsets isolated from both primary and metastatic human colorectal tumors. MATERIALS AND METHODS: Using our optimized protocols, unfixed colorectal tumors were enzymatically and mechanically dissociated into single cells followed by evaluation of postdigestion viability...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27895670/wnt5a-increases-properties-of-lung-cancer-stem-cells-and-resistance-to-cisplatin-through-activation-of-wnt5a-pkc-signaling-pathway
#18
Jiali Yang, Kangjian Zhang, Jing Wu, Juan Shi, Jing Xue, Jing Li, Juan Chen, Yongzhao Zhu, Jun Wei, Jinxi He, Xiaoming Liu
The development of chemoresistance to cisplatin regimens causes a poor prognosis in patients with advanced NSCLC. The role of noncanonical Wnt signaling in the regulation of properties of lung cancer stem cells and chemoresistance was interrogated, by accessing capacities of cell proliferation, migration, invasion, and clonogenicity as well as the apoptosis in A549 cell lines and cisplatin-resistant A549 cells treated with Wnt5a conditional medium or protein kinase C (PKC) inhibitor GF109203X. Results showed that the noncanonical Wnt signaling ligand, Wnt5a, could promote the proliferation, migration, invasion, and colony formation in A549 lung adenocarcinoma cells and cisplatin-resistant A549/DDP cells and increase the fraction of ALDH-positive cell in A549/DDP cells...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27895076/mesothelial-cells-create-a-novel-tissue-niche-that-facilitates-gastric-cancer-invasion
#19
Masamitsu Tanaka, Sei Kuriyama, Go Itoh, Daichi Maeda, Akiteru Goto, Yutaro Tamiya, Kazuyoshi Yanagihara, Masakazu Yashiro, Namiko Aiba
Peritoneal mesothelial cells (PMC) cover organ surfaces in the abdominal cavity. In this study, lineage tracing revealed that PMC guide cancer cell invasion in the gastric wall and in peritoneal metastatic lesions. Serosal PMC covering the stomach surface entered the gastric wall to create a novel niche that favored gastric cancer cell invasion. PMC infiltration was induced by incorporation of cancer cell-derived, Wnt3a-containing extracellular vesicles (EV). Infiltrated PMC in turn promoted subserosal invasion of cancer cells...
November 28, 2016: Cancer Research
https://www.readbyqxmd.com/read/27894093/new-use-of-an-old-drug-inhibition-of-breast-cancer-stem-cells-by-benztropine-mesylate
#20
Jihong Cui, Maija Hollmén, Lina Li, Yong Chen, Steven T Proulx, Daniel Reker, Gisbert Schneider, Michael Detmar
Cancer stem cells (CSCs) play major roles in cancer initiation, metastasis, recurrence and therapeutic resistance. Targeting CSCs represents a promising strategy for cancer treatment. The purpose of this study was to identify selective inhibitors of breast CSCs (BCSCs). We carried out a cell-based phenotypic screening with cell viability as a primary endpoint, using a collection of 2,546 FDA-approved drugs and drug-like molecules in spheres formed by malignant human breast gland-derived cells (HMLER-shEcad cells, representing BCSCs) and control immortalized non-tumorigenic human mammary cells (HMLE cells, representing normal stem cells)...
November 24, 2016: Oncotarget
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