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https://www.readbyqxmd.com/read/28448014/an-efficient-and-flexible-cell-aggregation-method-for-3d-spheroid-production
#1
Sarah M Maritan, Eric Y Lian, Lois M Mulligan
Monolayer cell culture does not adequately model the in vivo behavior of tissues, which involves complex cell-cell and cell-matrix interactions. Three-dimensional (3D) cell culture techniques are a recent innovation developed to address the shortcomings of adherent cell culture. While several techniques for generating tissue analogues in vitro have been developed, these methods are frequently complex, expensive to establish, require specialized equipment, and are generally limited by compatibility with only certain cell types...
March 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28436949/p14arf-interacts-with-the-focal-adhesion-kinase-and-protects-cells-from-anoikis
#2
M Vivo, R Fontana, M Ranieri, G Capasso, T Angrisano, A Pollice, V Calabrò, G La Mantia
The ARF protein functions as an important sensor of hyper-proliferative stimuli restricting cell proliferation through both p53-dependent and -independent pathways. Although to date the majority of studies on ARF have focused on its anti-proliferative role, few studies have addressed whether ARF may also have pro-survival functions. Here we show for the first time that during the process of adhesion and spreading ARF re-localizes to sites of active actin polymerization and to focal adhesion points where it interacts with the phosphorylated focal adhesion kinase...
April 24, 2017: Oncogene
https://www.readbyqxmd.com/read/28430645/midkine-promotes-hepatocellular-carcinoma-metastasis-by-elevating-anoikis-resistance-of-circulating-tumor-cells
#3
Bin Sun, Congli Hu, Zhibin Yang, Xiaofeng Zhang, Linlin Zhao, Junye Xiong, Junyong Ma, Lei Chen, Haihua Qian, Xiangji Luo, Lehua Shi, Jun Li, Xianshuo Cheng, Zhengfeng Yin
Midkine is overexpressed in hepatocellular carcinoma (HCC) and plays a role in tumor progression, but less is known about its role in resistance of circulating tumor cells (CTCs) to anoikis which leading to recurrence and metastasis. The aim of the present study was to analyze whether midkine was associated with HCC progression with anoikis resistance. We found that cultured HCC cells were more resistant to anoikis, which paralleled midkine expression, and midkine treatment significantly inhibited anoikis in a dose-dependent manner...
March 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28430130/timp1-promotes-cell-survival-by-activating-the-pdk1-signaling-pathway-in-melanoma
#4
Mariana Toricelli, Fabiana H M Melo, Aline Hunger, Daniela Zanatta, Bryan E Strauss, Miriam G Jasiulionis
High TIMP1 expression is associated with poor prognosis in melanoma, where it can bind to CD63 and β1 integrin, inducing PI3-kinase pathway and cell survival. Phosphatidylinositol (3,4,5)-trisphosphate (PIP3), generated under phosphatidylinositol-3-kinase (PI3K) activation, enables the recruitment and activation of protein kinase B (PKB/AKT) and phosphoinositide-dependent kinase 1 (PDK1) at the membrane, resulting in the phosphorylation of a host of other proteins. Using a melanoma progression model, we evaluated the impact of Timp1 and AKT silencing, as well as PI3K, PDK1, and protein kinase C (PKC) inhibitors on aggressiveness characteristics...
April 21, 2017: Cancers
https://www.readbyqxmd.com/read/28394276/targeting-colorectal-cancer-proliferation-stemness-and-metastatic-potential-using-brassicaceae-extracts-enriched-in-isothiocyanates-a-3d-cell-model-based-study
#5
Lucília P Pereira, Patrícia Silva, Marlene Duarte, Liliana Rodrigues, Catarina M M Duarte, Cristina Albuquerque, Ana Teresa Serra
Colorectal cancer (CRC) recurrence is often attributable to circulating tumor cells and/or cancer stem cells (CSCs) that resist to conventional therapies and foster tumor progression. Isothiocyanates (ITCs) derived from Brassicaceae vegetables have demonstrated anticancer effects in CRC, however little is known about their effect in CSCs and tumor initiation properties. Here we examined the effect of ITCs-enriched Brassicaceae extracts derived from watercress and broccoli in cell proliferation, CSC phenotype and metastasis using a previously developed three-dimensional HT29 cell model with CSC-like traits...
April 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28383561/mir-10a-suppresses-colorectal-cancer-metastasis-by-modulating-the-epithelial-to-mesenchymal-transition-and-anoikis
#6
Yankun Liu, Yingnan Zhang, Haidong Wu, Yufeng Li, Yi Zhang, Min Liu, Xin Li, Hua Tang
MicroRNAs (miRNAs) have a critical role in tumorigenesis and metastasis, which are major obstacles of cancer therapy. However, the role of miRNAs in colorectal cancer (CRC) metastasis remains poorly understood. Here, we found that miRNA-10a (miR-10a) was upregulated in primary CRC tissues and cell line (SW480) derived from primary CRC compared with metastatic cancer tissues in lymph node and cell line (SW620). The differential expression of miR-10a was inversely correlated with distant metastasis and invasion depth...
April 6, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28379900/baicalin-inhibits-human-osteosarcoma-cells-invasion-metastasis-and-anoikis-resistance-by-suppressing-the-transforming-growth-factor-%C3%AE-1-induced-epithelial-to-mesenchymal-transition
#7
Yanmao Wang, Huimin Wang, Runhua Zhou, Wanrun Zhong, Shengdi Lu, Zhongliang Ma, Yimin Chai
The epithelial-mesenchymal transition (EMT) plays an important role in inducing cancer metastasis. Baicalin, a flavone derivative isolated from Scutellaria spp., shows a series of pharmacological and physiological activities. However, the possible role of baicalin in the EMT is unclear. In this study, we attempted to investigate the potential use of baicalin as an inhibitor of transforming growth factor-β1 (TGF-β1)-induced EMT in U2OS cells. We found that TGF-β1 induced the EMT to promote U2OS cells migration, invasion, and anoikis resistance...
April 4, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28378936/the-tumor-suppressor-tropomyosin-tpm2-1-regulates-sensitivity-to-apoptosis-beyond-anoikis-characterized-by-changes-in-the-levels-of-intrinsic-apoptosis-proteins
#8
Melissa Desouza-Armstrong, Peter W Gunning, Justine R Stehn
The actin cytoskeleton is a polymer system that acts both as a sensor and mediator of apoptosis. Tropomyosins (Tpm) are a family of actin binding proteins that form co-polymers with actin and diversify actin filament function. Previous studies have shown that elevated expression of the tropomyosin isoform Tpm2.1 sensitized cells to apoptosis induced by cell detachment (anoikis) via an unknown mechanism. It is not yet known whether Tpm2.1 or other tropomyosin isoforms regulate sensitivity to apoptosis beyond anoikis...
April 5, 2017: Cytoskeleton
https://www.readbyqxmd.com/read/28378641/downregulation-of-prdm1-promotes-cellular-invasion-and-lung-cancer-metastasis
#9
Zhiyan Zhu, Hao Wang, Yiliang Wei, Fanrong Meng, Zhe Liu, Zhenfa Zhang
The zinc-finger transcription factor PRDM1 (PR domain containing 1) plays key roles in the development of malignant lymphoma, leukaemia and some non-haematopoietic cancers, including breast cancer, colorectal cancer and glioma. However, little is known regarding the function of PRDM1 in the progression of lung cancer. Here, we found that PRDM1 is expressed in normal human lung epithelium but is downregulated in lung cancer cells. Decreased expression of PRDM1 correlates with poor prognosis in lung cancer. Depletion of PRDM1 in lung cancer cells promotes cellular invasion and anoikis resistance in vitro and lung metastasis in vivo...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28372546/cellular-organization-and-molecular-differentiation-model-of-breast-cancer-associated-fibroblasts
#10
Susann Busch, Daniel Andersson, Eva Bom, Claire Walsh, Anders Ståhlberg, Göran Landberg
BACKGROUND: The role of cancer-associated fibroblasts (CAFs) during tumour progression is obscured by the inherently complex, heterotypic nature of fibroblast cells and behaviours in various subtypes of malignancies. Therefore, we sought to identify distinct fibroblast subpopulations at the single-cell level. METHODS: Using single-cell quantitative PCR as a powerful tool to study heterogeneity and rare cell events, in a high-throughput manner a panel of gene targets are run simultaneously on transcripts isolated from single cells obtained by fluorescence-activated cell sort...
April 3, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28371345/the-prostate-metastasis-suppressor-gene-ndrg1-differentially-regulates-cell-motility-and-invasion
#11
Anup Sharma, Janet Mendonca, James Ying, Hea-Soo Kim, James E Verdone, Jelani C Zarif, Michael Carducci, Hans Hammers, Kenneth J Pienta, Sushant Kachhap
Experimental and clinical evidence suggests that N-myc downregulated gene 1 (NDRG1) functions as a suppressor of prostate cancer metastasis. Elucidating pathways that drive survival and invasiveness of NDRG1-deficient prostate cancer cells can help in designing therapeutics to target metastatic prostate cancer cells. However, the molecular mechanism(s) that lead NDRG1-deficient prostate cancer cells to increased invasiveness remains largely unknown. In this study, we demonstrate that NDRG1-deficient prostate tumors have decreased integrin expression and reduced cell adhesion and motility...
April 2, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28366875/dual-role-of-muc1-mucin-in-kidney-ischemia-reperfusion-injury-nephroprotector-in-early-phase-but-pro-fibrotic-in-late-phase
#12
Jean-Baptiste Gibier, Brigitte Hémon, Mélanie Fanchon, Kelly Gaudelot, Nicolas Pottier, Bélinda Ringot, Isabelle Van Seuningen, François Glowacki, Christelle Cauffiez, David Blum, Marie-Christine Copin, Michaël Perrais, Viviane Gnemmi
Acute kidney injury (AKI) is characterized by acute tubular necrosis (ATN) which involves mainly proximal tubules. Past AKI is associated with higher risk of chronic kidney disease (CKD). The MUC1 mucin is a large glycoprotein responsible for epithelial protection and locates to convoluted distal tubules and collecting ducts. Since MUC1 activates the epithelial-mesenchymal transition (EMT) in carcinoma cells, we hypothesized that MUC1 could be involved in epithelial tubular cell plasticity, a process that accompanies epithelial repair, but also participates into kidney fibrosis, histological substratum of CKD...
March 30, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28362858/3-bromopyruvate-and-buthionine-sulfoximine-effectively-kill-anoikis-resistant-hepatocellular-carcinoma-cells
#13
Minjong Lee, Ara Jo, Seulki Lee, Jong Bin Kim, Young Chang, Joon Yeul Nam, Hyeki Cho, Young Youn Cho, Eun Ju Cho, Jeong-Hoon Lee, Su Jong Yu, Jung-Hwan Yoon, Yoon Jun Kim
BACKGROUND & AIMS: Acquisition of anoikis resistance is a prerequisite for metastasis in hepatocellular carcinoma (HCC). However, little is known about how energy metabolism and antioxidant systems are altered in anoikis-resistant (AR) HCC cells. We evaluated anti-tumor effects of a combination treatment of 3-bromopyruvate (3-BP) and buthionine sulfoximine (BSO) in AR HCC cells. METHODS: We compared glycolysis, reactive oxygen species (ROS) production, and chemoresistance among Huh-BAT, HepG2 HCC cells, and the corresponding AR cells...
2017: PloS One
https://www.readbyqxmd.com/read/28346100/robotic-mammosphere-assay-for-high-throughput-screening-in-triple-negative-breast-cancer
#14
P A Fitzpatrick, N Akrap, E M V Söderberg, H Harrison, G J Thomson, G Landberg
In order to identify novel treatment principles specifically affecting cancer stem cells in triple-negative breast cancer, we have developed a high-throughput screening method based on the mammosphere and anoikis resistance assays allowing us to screen compounds using a functional readout. The assay was validated against manual protocols and through the use of positive controls, such as the response to hypoxia and treatment with the known cancer stem cell-targeting compound salinomycin. Manual and robotic procedures were compared and produced similar results in cell handling, cell cultures, and counting techniques, with no statistically significant difference produced from either method...
February 1, 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28341852/profiling-of-long-non-coding-rnas-identifies-linc00958-and-linc01296-as-candidate-oncogenes-in-bladder-cancer
#15
Anna Katharina Seitz, Lise Lotte Christensen, Emil Christensen, Kasper Faarkrog, Marie Stampe Ostenfeld, Jakob Hedegaard, Iver Nordentoft, Morten Muhlig Nielsen, Johan Palmfeldt, Michelle Thomson, Michael Theis Solgaard Jensen, Roman Nawroth, Tobias Maurer, Torben Falck Ørntoft, Jørgen Bjerggaard Jensen, Christian Kroun Damgaard, Lars Dyrskjøt
Aberrant expression of long non-coding RNAs (lncRNAs) has been regarded as a critical component in bladder cancer (BC) and lncRNAs have been associated with BC development and progression although their overall expression and functional significance is still unclear. The aim of our study was to identify novel lncRNAs with a functional role in BC carcinogenesis. RNA-sequencing was used to identify aberrantly expressed lncRNAs in 8 normal and 72 BC samples. We identified 89 lncRNAs that were significantly dys-regulated in BC...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28322989/role-of-micrornas-in-endocrine-cancer-metastasis
#16
Cilene Rebouças Lima, Cibele Crastequini Gomes, Marinilce Fagundes Santos
The deregulation of transcription and processing of microRNAs (miRNAs), as well as their function, has been involved in the pathogenesis of several human diseases, including cancer. Despite advances in therapeutic approaches, cancer still represents one of the major health problems worldwide. Cancer metastasis is an aggravating factor in tumor progression, related to increased treatment complexity and a worse prognosis. After more than one decade of extensive studies of miRNAs, the fundamental role of these molecules in cancer progression and metastasis is beginning to be elucidated...
March 18, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28319061/ccdc178-promotes-hepatocellular-carcinoma-metastasis-through-modulation-of-anoikis
#17
X Hu, Y Zhao, L Wei, B Zhu, D Song, J Wang, L Yu, J Wu
Hepatocellular carcinoma (HCC) is one of the most malignant tumors with high rate of recurrence and metastasis. Coiled-coil domain-containing protein 178 (CCDC178) has been reported to be mutated in HCC, whereas its role in physiological and pathologic process, including in human cancer, remains largely unknown. Here, we found that CCDC178 is upregulated in HCC tissues and its overexpression is correlated with pathological stage (P=0.003). CCDC178 deficiency reduced the anchorage-independent growth and anoikis resistance of HCC cells, and inhibited the HCC metastasis in vivo...
March 20, 2017: Oncogene
https://www.readbyqxmd.com/read/28300825/cysteine-linked-dimerization-of-bst-2-confers-anoikis-resistance-to-breast-cancer-cells-by-negating-proapoptotic-activities-to-promote-tumor-cell-survival-and-growth
#18
Wadie D Mahauad-Fernandez, Chioma M Okeoma
Almost all breast tumors express the antiviral protein BST-2 with 67%, 25% and 8.2% containing high, medium or low levels of BST-2, respectively. Breast tumor cells and tissues that contain elevated levels of BST-2 are highly aggressive. Suppression of BST-2 expression reprograms tumorigenic properties of cancer cells and diminishes cancer cell aggressiveness. Using structure/function studies, we report that dimerization of BST-2 through cysteine residues located in the BST-2 extracellular domain (ECD), leads to anoikis resistance and cell survival through proteasome-mediated degradation of BIM-a key proapoptotic factor...
March 16, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28299282/extracellular-proton-concentrations-impacts-ln229-glioblastoma-tumor-cell-fate-via-differential-modulation-of-surface-lipids
#19
Sebastian John, K C Sivakumar, Rashmi Mishra
BACKGROUND: Glioblastoma multiforme (GBM) is a highly aggressive form of brain cancer with marginal survival rates. GBM extracellular acidosis can profoundly impact its cell fate heterogeneities and progression. However, the molecules and mechanisms that enable GBM tumor cells acid adaptation and consequent cell fate competencies are weakly understood. Since extracellular proton concentrations (pHe) directly intercept the tumor cell plasma membrane, surface lipids must play a crucial role in pHe-dependent tumor cell fate dynamics...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28266044/role-and-impact-of-the-extracellular-matrix-on-integrin-mediated-pancreatic-%C3%AE-cell-functions
#20
REVIEW
Caroline Arous, Bernhard Wehrle-Haller
Understanding the organisation and role of the extracellular matrix (ECM) in islets of Langerhans is critical for maintaining pancreatic β-cells, and to recognise and revert the physiopathology of diabetes. Indeed, integrin-mediated adhesion signalling in response to the pancreatic ECM plays crucial roles in β-cell survival and insulin secretion, two major functions, which are affected in diabetes. Here, we would like to present an update on the major components of the pancreatic ECM, their role during integrin-mediated cell-matrix adhesions and how they are affected during diabetes...
March 7, 2017: Biology of the Cell
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