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Cell Adhesion & Migration

Nicholas R Anderson, Alexander Buffone, Daniel A Hammer
The leukocyte adhesion cascade is of critical importance for both the maintenance of immune homeostasis and the ability of immune cells to perform effector functions. Here, we present data showing CD4+ T cells migrate upstream (against the direction of flow) after completing the leukocyte adhesion cascade on surfaces displaying either ICAM-1 or ICAM-1 and VCAM-1, but migrate downstream on surfaces displaying only VCAM-1. Cells completing the cascade on HUVECs initially migrate upstream before reverting to more random migration, partly caused by transmigration of cells migrating against the flow...
March 17, 2019: Cell Adhesion & Migration
Xiaowei Zhang, Lan Sun, Wei Chen, Shanna Wu, Yanmeng Li, Xiaojin Li, Bei Zhang, Jingyi Yao, Huan Wang, Anjian Xu
The actin cytoskeleton of hepatic stellate cells (HSCs) is reorganized when they are cultured in 3D collagen matrices. Here, we investigated the molecular mechanism of actin cytoskeleton reorganization in HSCs cultured in 3D floating collagen matrices (FCM) compared to those on 2D polystyrene surfaces (PS). First, we found that the generation of dendritic cellular processes was controlled by Rac1. Next, we examined the differential gene expression of HSCs cultured on 2D PS and in 3D FCM by RNA-Seq and focused on the changes of actin cytoskeleton reorganization-related molecular components and guanine nucleotide exchange factors (GEFs)...
March 15, 2019: Cell Adhesion & Migration
Juo-Han Lin, Wen-Jui Lee, Han-Chung Wu, Chih-Hsiung Wu, Li-Ching Chen, Chi-Cheng Huang, Hang-Lung Chang, Tzu-Chun Cheng, Hui-Wen Chang, Chi-Tang Ho, Shih-Hsin Tu, Yuan-Soon Ho
The function of small G protein signalling modulators (SGSM1/2/3) in cancer remains unknown. Our findings demonstrated that SGSM2 is a plasma membrane protein that strongly interacted with E-cadherin/β-catenin. SGSM2 downregulation enhanced the phosphorylation of focal adhesion kinase (FAK; Y576/577), decreased the expression of epithelial markers such as E-cadherin, β-catenin, and Paxillin, and increased the expression of Snail and Twist-1, which reduced cell adhesion and promoted cancer cell migration. Oestrogen and fibronectin treatment was found to promote the colocalization of SGSM2 at the leading edge with phospho-FAK (Y397)...
February 11, 2019: Cell Adhesion & Migration
Zeinab Al-Rekabi, Adriane M Fura, Ilsa Juhlin, Alaa Yassin, Tracy E Popowics, Nathan J Sniadecki
The role of hyaluronan (HA) in periodontal healing has been speculated via its interaction with the CD44 receptor. While HA-CD44 interactions have previously been implicated in numerous cell types; effect and mechanism of exogenous HA on periodontal ligament (PDL) cells is less clear. Herein, we examine the effect of exogenous HA on contractility and migration in human and murine PDL cells using arrays of microposts and time-lapse microscopy. Our findings observed HA-treated human PDL cells as more contractile and less migratory than untreated cells...
January 24, 2019: Cell Adhesion & Migration
Zhiping Yan, Guanyue Su, Wenbo Gao, Jia He, Yang Shen, Ye Zeng, Xiaoheng Liu
Fluid shear stress (FSS) regulates the metastasis of hepatocellular carcinoma (HCC). In the present study, we aimed to study the role of autophagy in HCC cells under FSS. The results showed that FSS upregulated the protein markers of autophagy, induced LC3B aggregation and formation of autophagosomes. Inhibition of integrin by Cliengitide (Cli) or inhibition of the microfilaments formation both inhibited the activation of autophagy in HepG2 under FSS. In addition, Cli inhibited the microfilaments formation and expressions of Rac1 and RhoA in HepG2 cells under FSS...
January 21, 2019: Cell Adhesion & Migration
S M Anisul Islam, Rekha Patel, Raja Reddy Bommareddy, Khandker Mohammad Khalid, Mildred Acevedo-Duncan
Colorectal cancer (CRC) is the third most common cancer in the United States. The exact mechanism of CRC cells metastasis is poorly understood. Actin polymerization is thought to be an initial step in the cancer cell motility cycle which drives the formation of cell protrusions and defines the direction of migration. Cofilin, a significant actin-regulating molecule, regulates the migration of cancer cells by the formation of lamellipodia and filopodia, however, little is known about the upstream regulation of cofilin...
November 10, 2018: Cell Adhesion & Migration
Svetlana I Galkina, Natalia V Fedorova, Alexander L Ksenofontov, Vladimir I Stadnichuk, Ludmila A Baratova, Galina F Sud'Ina
Neutrophils release branched-chain (valine, isoleucine, leucine), aromatic (tyrosine, phenylalanine) and positively charged free amino acids (arginine, ornithine, lysine, hydroxylysine, histidine) when adhere and spread onto fibronectin. In the presence of agents that impair cell spreading or adhesion (cytochalasin D, fMLP, nonadhesive substrate), neutrophils release the same amino acids, except for a sharp decrease in hydroxylysine and an increase in phenylalanine, indicating their special connection with cell adhesion...
October 29, 2018: Cell Adhesion & Migration
Kelsey Gasior, Nikki J Wagner, Jhon Cores, Rose Caspar, Alyson Wilson, Sudin Bhattacharya, Marlene L Hauck
The epithelial mesenchymal transition (EMT) is one step in the process through which carcinoma cells metastasize by gaining the cellular mobility associated with mesenchymal cells. This work examines the dual influence of the TGF-β pathway and intercellular contact on the activation of EMT in colon (SW480) and breast (MCF7) carcinoma cells. While the SW480 population revealed an intermediate state between the epithelial and mesenchymal states, the MC7 cells exhibited highly adhesive behavior. However, for both cell lines, an exogenous TGF-β signal and a reduction in cellular confluence can push a subgroup of the population towards the mesenchymal phenotype...
October 8, 2018: Cell Adhesion & Migration
Christian Mayr, Marlena Beyreis, Heidemarie Dobias, Martin Gaisberger, Julia Fuchs, Martin Pichler, Markus Ritter, Martin Jakab, Katharina Helm, Daniel Neureiter, Tobias Kiesslich
Cellular migration is essential in diverse physiological and pathophysiological processes. Here, we present a protocol for quantitative analysis of migration using confluence detection allowing continuous, non-endpoint measurement with minimal hands-on time under cell incubator conditions. Applicability was tested using substances which enhance (EGF) or inhibit (cytochalasin D, ouabain) migration. Using a gap-closure assay we demonstrate that automated confluence detection monitors cellular migration in the 96-well microplate format...
October 8, 2018: Cell Adhesion & Migration
Muzaffer Dükel, Zehra Tavsan, Duygu Erdogan, Deniz Erkan Gök, Hulya Ayar Kayali
During development of colon cancer, Protein Kinase Cs (PKCs) are involved in regulation of many genes controlling several cellular mechanisms. Here, we examined the changes in cell adhesion molecules and PKCs for colorectal cancer progression. We identified that PKCs affected expression of EpCAM, claudins, tetraspanins. Treatment with low concentrations of PKC inhibitors resulted in decreased cell viability. In addition, immunoblotting and qRT-PCR analysis showed that apoptosis was inhibited while autophagy was induced by PKC inhibition in colon cancer cells...
October 5, 2018: Cell Adhesion & Migration
Alexandra Sneider, Jungwon Hah, Denis Wirtz, Dong-Hwee Kim
Cell migration is a highly orchestrated cellular event that involves physical interactions of diverse subcellular components. The nucleus as the largest and stiffest organelle in the cell not only maintains genetic functionality, but also actively changes its morphology and translocates through dynamic formation of nucleus-bound contractile stress fibers. Nuclear motion is an active and essential process for successful cell migration and nucleus self-repairs in response to compression and extension forces in complex cell microenvironment...
September 27, 2018: Cell Adhesion & Migration
Mariana Costa Braga Schmidt, Katia L P Morais, Maíra Estanislau Soares de Almeida, Asif Iqbal, Mauricio Barbugiani Goldfeder, Ana Marisa Chudzinski-Tavassi
In a tumor microenvironment, endothelial cell migration and angiogenesis allow cancer to spread to other organs causing metastasis.  Indeed, a number of molecules that are involved in cytoskeleton re-organization and intracellular signaling have been investigated for their effects on tumor cell growth and metastasis. Alongside that, Amblyomin-X, a recombinant Kunitz-type protein, has been shown to reduce metastasis and tumor growth in in vivo experiments. In the present report, we provide a mechanistic insight to these antitumor effects, this is,  Amblyomin-X modulates Rho-GTPases and uPAR signaling, and reduces the release of MMPs, leading to disruption of the actin cytoskeleton and decreased cell migration of tumor cell lines...
September 25, 2018: Cell Adhesion & Migration
Mayur Gadiya, Goutam Chakraborty
Collagen is the most abundant component of tumor extracellular matrix (ECM). ECM collagens are known to directly interact with the tumor cells via cell surface receptor and play crucial role in tumor cell survival and promote tumor progression. Collagen receptor DDR1 is a member of receptor tyrosine kinase (RTK) family with a unique motif in the extracellular domain resembling Dictyostelium discoideum protein discoidin-I. DDR1 displays delayed and sustained activation upon interaction with collagen and recent findings have demonstrated that DDR1-collagen signaling play important role in cancer progression...
September 6, 2018: Cell Adhesion & Migration
Andrea A Villanueva, Sofía Puvogel, Pablo Lois, Ernesto Muñoz-Palma, Manuel Ramírez Orellana, Fabiana Lubieniecki, Fernando Casco Claro, Iván Gallegos, Javier García-Castro, Pilar Sanchez-Gomez, Vicente A Torres, Verónica Palma
Neuroblastoma (NB) is the most common pediatric extracranial solid tumor. It arises during development of the sympathetic nervous system. Netrin-4 (NTN4), a laminin-related protein, has been proposed as a key factor to target NB metastasis, although there is controversy about its function. Here, we show that NTN4 is broadly expressed in tumor, stroma and blood vessels of NB patient samples. Furthermore, NTN4 was shown to act as a cell adhesion molecule required for the migration induced by Neogenin-1 (NEO1) in SK-N-SH neuroblastoma cells...
August 30, 2018: Cell Adhesion & Migration
Xiangtao Zheng, Ziheng Wu, Ke Xu, Yihui Qiu, Xiang Su, Zhen Zhang, Mengtao Zhou
In this study, we investigated the role ofhistone deacetylase 4 (HDAC4) and MEG3/miR-125a-5p/interferonregulatoryfactor 1 (IRF1) on vascular smooth muscle cell (VSMCs)proliferation. Platelet derived growth factor (PDGF)-BB was used toinduce the proliferation and migration of VSMCs. The expressionsof MEG3, miR-125a-5p, HDAC4 and IRF1in VSMCs were detectedby qRT-PCR and western blot, respectively. ChIP assay was usedto determine the relationship between MEG3 and HDAC4. Doubleluciferase reporter assay was used to test the regulation betweenmiR-125-5p and IRF1...
August 29, 2018: Cell Adhesion & Migration
Arian Ansardamavandi, Mohammad Tafazzoli-Shadpour, Mohammad Ali Shokrgozar
The micro-environment of cancer cells in the body is mechanically stiffer than that of normal cells. We cultured three breast cell lines of MCF10A-normal, MCF7-noninvasive, and MDA-MB-231-invasive on PDMS substrates with different elastic moduli and different cellular features were examined.Effects of substrate stiffness on cell behavior were evident among all cell lines. Cancerous cells were more sensitive to substrate stiffness for cell behaviors related to cell motility and migration which are necessary for invasion...
August 28, 2018: Cell Adhesion & Migration
Leonardo A Moraes, Patrick B Ampomah, Lina H K Lim
Targeting inflammation in cancer has shown promise to improve and complement current therapies. The tumor microenvironment plays an important role in cancer growth and metastasis and -tumor associated macrophages possess pro-tumoral and pro-metastatic properties. Annexin A1 (ANXA1) is an immune-modulating protein with diverse functions in the immune system and in cancer. In breast cancer, high ANXA1 expression leads to poor prognosis and increased metastasis. Here, we will review ANXA1 as a modulator of inflammation, and discuss its importance in breast cancer and highlight its new role in alternative macrophage activation in the tumor microenvironment...
August 19, 2018: Cell Adhesion & Migration
Cecilia Arriagada, Patricio Silva, Vicente A Torres
Hypoxia, a common condition of the tumor microenvironment, induces changes in the proteome of cancer cells, mainly via HIF-1, a transcription factor conformed by a constitutively expressed β-subunit and an oxygen-regulated α-subunit. In hypoxia, HIF-1α stabilizes, forms the heterodimeric complex with HIF-1β, and binds to Hypoxia Response Elements (HRE), activating gene expression to promote metabolic adaptation, cell invasion and metastasis. Furthermore, the focal adhesion kinase, FAK, is activated in hypoxia, promoting cell migration by mechanisms that remain unclear...
August 19, 2018: Cell Adhesion & Migration
Annalisa La Gatta, Antonella D'Agostino, Chiara Schiraldi, Giuseppe Colella, Nicola Cirillo
Hyaluronic acid (HA) preparations are widely used in clinical practice and recent data suggest that commercially available HA-based compounds promote ulcer re-epithelialization and induce pain relief. However, the pathophysiological basis of these effects remains poorly understood. In the present study, we investigated the biophysical, biomolecular and functional properties of a HA preparation combined with a pool of collagen precursor synthetic aminoacids, namely l-proline, l-leucine, l-lysine and glycine (Aminogam®)...
August 19, 2018: Cell Adhesion & Migration
Bin Zhang, Weidong Wang, Chonghui Li, Rong Liu
The inositol polyphosphate-4-phosphatase type II (INPP4B) has been mostly proposed to act as a tumor suppressor whose expression is frequently dysregulated in numerous human cancers. To date, little is unveiled about whether and how INPP4B will exert its tumor suppressive function on the turnover of cadherin-based cell-cell adhesion system in pancreatic ductal adenocarcinomas (PDACs) in vitro. Here we provide the evidence that INPP4B manipulates cadherin switch in certain PDAC cell lines through a phosphorylated AKT-inactivation manner...
August 19, 2018: Cell Adhesion & Migration
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