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https://www.readbyqxmd.com/read/28432431/initial-cell-adhesion-of-three-cell-types-in-the-presence-and-absence-of-serum-proteins
#1
Martina Verdanova, Pavla Sauerova, Ute Hempel, Marie Hubalek Kalbacova
With the development of a wide range of new biomaterials for the sensing of different cell behaviour, it is important to consider whether the cells tested in vitro are in direct contact with the material or whether cell-biomaterial contact is mediated by an interfacial layer of proteins originating from the culture medium or from the cells themselves. Thus, this study describes the differences between the cell adhesion mediated by proteins originating from foetal bovine serum and without the presence of such proteins 2 h following cell seeding exemplarily with different cell types (an osteoblastic cell line, primary fibroblasts, and mesenchymal stem cells)...
April 21, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28423510/genistein-inhibits-the-growth-and-regulates-the-migration-and-invasion-abilities-of-melanoma-cells-via-the-fak-paxillin-and-mapk-pathways
#2
Shuna Cui, Juan Wang, Qingqing Wu, Jing Qian, Changshui Yang, Ping Bo
Genistein is one of the main components of soy-based foods, which are widely known for their many benefits, including anti-cancer, anti-inflammatory, and antioxidant effects. In this study, we investigated the anti-metastasis effects of genistein on B16F10 melanoma cells. Our results showed that genistein strongly inhibited B16F10 cell proliferation and induced apoptosis in time- and concentration-dependent manners. Genistein altered the morphology of B16F10 cells to an elongated shape with slim pseudopodia-like protrusions...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28401269/vinculin-in-cell-cell-and-cell-matrix-adhesions
#3
REVIEW
Jennifer L Bays, Kris A DeMali
Vinculin was identified as a component of focal adhesions and adherens junctions nearly 40 years ago. Since that time, remarkable progress has been made in understanding its activation, regulation and function. Here we discuss the current understanding of the roles of vinculin in cell-cell and cell-matrix adhesions. Emphasis is placed on the how vinculin is recruited, activated and regulated. We also highlight the recent understanding of how vinculin responds to and transmits force at integrin- and cadherin-containing adhesion complexes to the cytoskeleton...
April 11, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28390183/cytocompatibility-assessment-of-ti-zr-pd-si-nb-alloys-with-low-young-s-modulus-increased-hardness-and-enhanced-osteoblast-differentiation-for-biomedical-applications
#4
Andreu Blanquer, Jana Musilkova, Leonardo Barrios, Elena Ibáñez, Marta Vandrovcova, Eva Pellicer, Jordi Sort, Lucie Bacakova, Carme Nogués
Ti-based alloys have increased importance for biomedical applications due to their excellent properties. In particular, the two recently developed TiZrPdSi(Nb) alloys, with a predominant β-Ti phase microstructure, have good mechanical properties, such as a relatively low Young's modulus and high hardness. In the present work, the cytocompatibility of these alloys was assessed using human osteoblast-like Saos-2 cells. Cells grown on the alloys showed larger spreading areas (more than twice) and higher vinculin content (nearly 40% increment) when compared with cells grown on glass control surfaces, indicating a better cell adhesion...
April 8, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28388663/vinculin-association-with-actin-cytoskeleton-is-necessary-for-stiffness-dependent-regulation-of-vinculin-behavior
#5
Tomohiro Omachi, Takafumi Ichikawa, Yasuhisa Kimura, Kazumitsu Ueda, Noriyuki Kioka
The extracellular matrix (ECM) is a major regulator of cell behavior. Recent studies have indicated the importance of the physical properties of the ECM, including its stiffness, for cell migration and differentiation. Using actomyosin-generated forces, cells pull the ECM and sense stiffness via cell-ECM adhesion structures called focal adhesions (FAs). Vinculin, an actin-binding FA protein, has emerged as a major player in FA-mediated mechanotransduction. Although vinculin is important for sensing ECM stiffness, the role of vinculin binding to actin in the ECM stiffness-mediated regulation of vinculin behavior remains unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28385574/ouabain-promotes-partial-epithelial-to-mesenchymal-transition-emt-changes-in-human-autosomal-dominant-polycystic-kidney-disease-adpkd-cells
#6
Jessica Venugopal, Jeffrey McDermott, Gladis Sanchez, Madhulika Sharma, Leandro Barbosa, Gail A Reif, Darren P Wallace, Gustavo Blanco
The hormone ouabain has been shown to enhance the cystic phenotype of autosomal dominant polycystic kidney disease (ADPKD). Among other characteristics, the ADPKD phenotype includes cell de-differentiation and epithelial to mesenchymal transition (EMT). Here, we determined whether physiological concentrations of ouabain induces EMT in human renal epithelial cells from patients with ADPKD. We found that ADPKD cells respond to ouabain with a decrease in expression of the epithelial marker E-cadherin and increase in the expression of the mesenchymal markers N-cadherin, α smooth muscle actin (αSMA) and collagen-I; and the tight junction protein occludin and claudin-1...
April 3, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28376104/inositol-1-4-5-trisphosphate-dependent-nuclear-calcium-signals-regulate-angiogenesis-and-cell-motility-in-triple-negative-breast-cancer
#7
Erika Guimarães, Rodrigo Machado, Matheus de Castro Fonseca, Andressa França, Clarissa Carvalho, Ana Cândida Araújo E Silva, Brígida Almeida, Puebla Cassini, Bárbara Hissa, Luciana Drumond, Carlos Gonçalves, Gabriel Fernandes, Marina De Brot, Márcio Moraes, Lucíola Barcelos, José Miguel Ortega, André Oliveira, M Fátima Leite
Increases in nuclear calcium concentration generate specific biological outcomes that differ from those resulting from increased cytoplasmic calcium. Nuclear calcium effects on tumor cell proliferation are widely appreciated; nevertheless, its involvement in other steps of tumor progression is not well understood. Therefore, we evaluated whether nuclear calcium is essential in other additional stages of tumor progression, including key steps associated with the formation of the primary tumor or with the metastatic cascade...
2017: PloS One
https://www.readbyqxmd.com/read/28373611/actin-filament-association-at-adherens-junctions
#8
Shigenobu Yonemura
The adherens junction (AJ) is a cadherin-based and actin filament associated cell-to-cell junction. AJs can contribute to tissue morphogenesis and homeostasis and their association with actin filaments is crucial for the functions. There are three types of AJs in terms of the mode of actin filament/AJ association. Among many actin-binding proteins associated with AJs, α-catenin is one of the most important actin filament/AJ linkers that functions in all types of AJs. Although α-catenin in cadherin-catenin complex appears to bind to actin filaments within cells, it fails to bind to actin filaments in vitro mysteriously...
2017: Journal of Medical Investigation: JMI
https://www.readbyqxmd.com/read/28373245/an-east-asian-common-variant-vinculin-p-asp841his-was-associated-with-sudden-unexplained-nocturnal-death-syndrome-in-the-chinese-han-population
#9
Jianding Cheng, John W Kyle, Di Lang, Brandi Wiedmeyer, Jian Guo, Kun Yin, Lei Huang, Ravi Vaidyanathan, Terry Su, Jonathan C Makielski
BACKGROUND: We have identified the cardiomyopathy-susceptibility gene vinculin (VCL) mutation M94I may account for a sudden unexplained nocturnal death syndrome (SUNDS) case. We addressed whether VCL common variant D841H is associated with SUNDS. METHODS AND RESULTS: In 8 of 120 SUNDS cases, we detected an East Asian common VCL variant p.Asp841His (D841H). Comparing the H841 allele frequency of the general population in the local database (15 of 1818) with SUNDS victims (10 of 240) gives an odds ratio for SUNDS of 5...
April 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28355484/podosome-force-generation-machinery-a-local-balance-between-protrusion-at-the-core-and-traction-at-the-ring
#10
Anaïs Bouissou, Amsha Proag, Nicolas Bourg, Karine Pingris, Clément Cabriel, Stéphanie Balor, Thomas Mangeat, Christophe Thibault, Christophe Vieu, Guillaume Dupuis, Emmanuel Fort, Sandrine Lévêque-Fort, Isabelle Maridonneau-Parini, Renaud Poincloux
Determining how cells generate and transduce mechanical forces at the nanoscale is a major technical challenge for the understanding of numerous physiological and pathological processes. Podosomes are submicrometer cell structures with a columnar F-actin core surrounded by a ring of adhesion proteins, which possess the singular ability to protrude into and probe the extracellular matrix. Using protrusion force microscopy, we have previously shown that single podosomes produce local nanoscale protrusions on the extracellular environment...
April 4, 2017: ACS Nano
https://www.readbyqxmd.com/read/28342760/correction-of-hirschsprung-associated-mutations-in-human-induced-pluripotent-stem-cells-via-crispr-cas9-restores-neural-crest-cell-function
#11
Frank Pui-Ling Lai, Sin-Ting Lau, John Kwong-Leong Wong, Hongsheng Gui, Reeson Xu Wang, Tingwen Zhou, Wing Hon Lai, Hung-Fat Tse, Paul Kwong-Hang Tam, Maria-Mercedes Garcia-Barcelo, Elly Sau-Wai Ngan
BACKGROUND & AIM: Hirschsprung disease is caused by failure of enteric neural crest cells (ENCCs) to fully colonize the bowel, leading to bowel obstruction and megacolon. Heterozygous mutations in the coding region of the RET gene cause a severe form of Hirschsprung disease (total colonic aganglionosis). However, 80% of HSCR patients have short-segment Hirschsprung disease (S-HSCR), which has not been associated with genetic factors. We sought to identify mutations associated S-HSCR, and used the CRISPR/Cas9 gene editing system to determine how mutations affect ENCC function...
March 22, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28316141/dasatinib-inhibits-actin-fiber-reorganization-and-promotes-endothelial-cell-permeability-through-rhoa-rock-pathway
#12
Swapan K Dasgupta, Anhquyen Le, K Vinod Vijayan, Perumal Thiagarajan
Treatment with dasatinib, a tyrosine kinase inhibitor, is associated with edema, pleural effusion, and pulmonary edema. We investigated the effect of dasatinib on the barrier function of human microvascular endothelial cells-1 (HMEC-1) in vitro and in vivo. The permeability of HMEC-1 to fluorescein isothiocyante (FITC)-dextran increased in Transwell chambers within 5 min following the addition of therapeutic concentrations of dasatinib. The change in permeability was associated with increased activation of RhoA GTPase and its effector Rho-associated coiled-coil kinase 1(ROCK1)...
April 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28302906/distinct-focal-adhesion-protein-modules-control-different-aspects-of-mechanotransduction
#13
Ben Stutchbury, Paul Atherton, Ricky Tsang, De-Yao Wang, Christoph Ballestrem
Focal adhesions (FAs) are macromolecular complexes that regulate cell adhesion and mechanotransduction. Using fluorescence recovery after photobleaching (FRAP) and fluorescence loss after photoactivation (FLAP), we found that the mobility of core FA proteins correlates with protein function. Structural proteins such as tensin, talin and vinculin are significantly less mobile in FAs than signaling proteins such as FAK and paxillin. The mobilities of the structural proteins are directly influenced by substrate stiffness, suggesting they are involved in sensing the rigidity of the extracellular environment...
March 16, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28299994/the-changes-of-cytoskeletal-proteins-induced-by-the-fast-effect-of-estrogen-in-mouse-blastocysts-and-its-roles-in-implantation
#14
Shi-Mao Zhang, Lin-Lin Yu, Ting Qu, Ying Hu, Dong-Zhi Yuan, Sheng Zhang, Qian Xu, You-Bo Zhao, Jin-Hu Zhang, Li-Min Yue
It is necessary for estrogen to activate mouse blastocysts, so that they can attach to endometrial epithelium in implantation and in our previous research, we have proved estrogen can induce a fast increase in intracellular calcium of mouse blastocysts through acting on G protein-coupled receptor 30 (GPR30), which further promotes their implantation. Moreover, there has been evidence that cytoskeletal proteins are involved in integrin-mediated adhesion of many kinds of cells, which also plays an important role in implantation...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28292367/myofibroblast-mediated-contraction
#15
Wae M Al Kattan, Seham F Alarfaj, Bayan M Alnooh, Hadeel F Alsaif, Hayfa S Alabdul Karim, Noha M Al-Qattan, Mohammad M Al-Qattan, Amel A F El-Sayed
Myofibroblast-mediated contraction is viewed as a cycle of four steps. The first step is stimulation of myofibroblasts by lysophospholipids leading to the activation of G proteins and ending with contraction of the actin-myosin complex. The next step is the transmission of the intracellular contractile force at the focal adhesions of myofibroblasts; a step that involves talin, vinculin, paxillin, Hic-5, and the integrin receptors. In the third step, fibronectin will act as the extracellular link between the integrin receptors and the extracellular collagen...
January 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28286026/clonorchis-sinensis-excretory-secretory-products-promote-the-migration-and-invasion-of-cholangiocarcinoma-cells-by-activating-the-integrin-%C3%AE-4-fak-src-signaling-pathway
#16
Jhang Ho Pak, Qudsia Bashir, In Ki Kim, Sung-Jong Hong, Sejung Maeng, Young Yil Bahk, Tong-Soo Kim
Cholangiocarcinoma (CCA) is a slow-growing but highly metastatic cancer. Its metastatic potential largely explains its high mortality rate. A recognized risk factor for CCA development is infection with the liver flukes Opisthorchis viverrini and Clonorchis sinensis. We previously reported that the excretory-secretory products (ESPs) of C. sinensis promoted the three-dimensional aggregation and invasion of CCA cells. In the present study, a quantitative real-time PCR array of extracellular matrix (ECM) and adhesion molecules was used to examine the regulatory mechanism of ESP-mediated CCA cell migration and invasion...
March 8, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28273809/proteome-analysis-of-human-follicular-thyroid-cancer-cells-exposed-to-the-random-positioning-machine
#17
Johann Bauer, Sascha Kopp, Elisabeth Maria Schlagberger, Jirka Grosse, Jayashree Sahana, Stefan Riwaldt, Markus Wehland, Ronald Luetzenberg, Manfred Infanger, Daniela Grimm
Several years ago, we detected the formation of multicellular spheroids in experiments with human thyroid cancer cells cultured on the Random Positioning Machine (RPM), a ground-based model to simulate microgravity by continuously changing the orientation of samples. Since then, we have studied cellular mechanisms triggering the cells to leave a monolayer and aggregate to spheroids. Our work focused on spheroid-related changes in gene expression patterns, in protein concentrations, and in factors secreted to the culture supernatant during the period when growth is altered...
March 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28266545/loss-of-er%C3%AE-induces-amoeboid-like-migration-of-breast-cancer-cells-by-downregulating-vinculin
#18
Yuan Gao, Zhaowei Wang, Qiang Hao, Weina Li, Yujin Xu, Juliang Zhang, Wangqian Zhang, Shuning Wang, Shuo Liu, Meng Li, Xiaochang Xue, Wei Zhang, Cun Zhang, Yingqi Zhang
Oestrogen receptor alpha (ERα) is a well-known target of endocrine therapy for ERα-positive breast cancer. ERα-negative cells, which are enriched during endocrine therapy, are associated with metastatic relapse. Here we determine that loss of ERα in the invasive front and in lymph node metastasis in human breast cancer is significantly correlated with lymphatic metastasis. Using in vivo and in vitro experiments, we demonstrate that ERα inhibits breast cancer metastasis. Furthermore, we find that ERα is a novel regulator of vinculin expression in breast cancer...
March 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28262301/effects-of-alcohol-on-postoperative-adhesion-formation-in-ischemic-myocardium-and-pericardium
#19
Nassrene Y Elmadhun, Ashraf A Sabe, Antonio D Lassaletta, Rahul S Dalal, Frank W Sellke
BACKGROUND: Postoperative formation of adhesions increases risk of complications during cardiac reoperations. We previously demonstrated that swine supplemented with vodka had a significant reduction in adhesions at sternotomy after previous thoracotomy. This follow-up study was conducted to determine reproducibility and the mechanism for adhesion reduction in swine supplemented with ethanol. METHODS: An ameroid constrictor was placed in the left circumflex in 14 male Yorkshire swine to induce chronic myocardial ischemia through left minithoracotomy...
March 2, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28251141/vinculin-at-the-heart-of-aging
#20
COMMENT
William H Bradford, Jeffrey H Omens, Farah Sheikh
No abstract text is available yet for this article.
February 2017: Annals of Translational Medicine
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