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2. Mechanosensitivity of CMPCs :strain response in 2D and 3D environments

Author

Bax, N. A. M., Mauretti, A., Marion, M. H., Mark van Turnhout, Schaft, D. W. J., Goumans, M. J. T. H., Given Names Deactivated Family Name Deactivated, Carlijn Bouten, Soft Tissue Biomech. & Tissue Eng., and Strategic Area Energy

Subjects
SDG 3 - Good Health and Well-being
Abstract

Cardiomyocytes progenitor cells (CMPCs) are a candidate cell source for cardiac regenerative therapy. To assess their full potential for cardiac regeneration, it is essential to know if and how CMPCs sense and respond to the three-dimensional (3D) environment and mechanical stimuli provided by the beating heart. Therefore, we study the response to uniaxial (cyclic) strain (10% with 0.5Hz) of undifferentiated and predifferentiated human CMPCs in a 2D environment, as well as how CMPCs respond to unidirectional constrained versus stress-free (unconstrained) 3D environments. We observe that while undifferentiated CMPCs maintain their original orientation, upon early cardiomyogenic differentiation (predifferentiated) CMPCs exhibit a distinct re-orientation away from the applied strain (strain avoidance) response during 48hrs of cyclic straining in a 2D environment. In 3D unidirectionally constrained hydrogels, undifferentiated CMPCs retain their cardiomyogenic stem cell profile. CMPCs cultured in 3D collagen/Matrigel hydrogels respond to static mechanical strains as expected by cell alignment. Our results suggest that CMPCs respond to the presence of mechanical stimuli, proposing that CMPCs are indeed mechanosensitive. Although in 2D environments, mechanosensitivity of the CMPCs is dependent on their differentiation status. Our findings provide the first understanding of the ability of human CMPCs to sense mechanical stimuli, which is the first initial step in mechanotransduction. Mechanotransduction is essential for optimal recruitment, migration, and mechanical integration of progenitor cells into the injured myocardium. Therefore, the presented results can contribute to enhance efficacy of current treatments of cardiac disease.

Published
2016

3. Mechanosensitivity of cardiomyocyte progenitor cells : the strain response in 2D and 3D environments

Author

Bax, N. A. M., Mauretti, A., Marion, M. H., Turnhout, M. C., Schaft, D. W. J., Sahlgren, C. M., Marie Jose Goumans, Bouten, C. V. C., Soft Tissue Biomech. & Tissue Eng., and Strategic Area Energy

Subjects
SDG 3 - Good Health and Well-being
Abstract

Purpose Cardiomyocytes progenitor cells (CMPCs) are a candidate cell source for cardiac regenerative therapy. To assess their full potential for cardiac regeneration, it is essential to know if and how CMPCs sense and respond to the three-dimensional (3D) environment and the mechanical stimuli provided by the beating heart. Therefore, we study the response to cyclic strain of undifferentiated and predifferentiated human CMPCs in a 2D environment, as well as CMPC responses to unidirectionally constrained versus stress-free (unconstrained) 3D environments. The latter responses were studied using a hydrogel system that allows for interaction of the cells with a simulated ‘host’ tissue. Methods To test mechanosensitivity of CMPCs in 2D and 3D environments, the response of L9TB CMPCs to uniaxial (cyclic) strain (10% with 0.5 Hz) was investigated. To represent the 3D environment, CMPCs were cultured in unidirectionally constrained and stress-free collagen/Matrigel hydrogels, where the constrainment provides a static strain to the cells. The cellular mechanoresponse to the applied (cyclic) strain was quantified by cellular re-orientation away from the strain direction (strain avoidance). Next to cellular re-orientation, the effect of strain on cell differentiation was analyzed. Results Our results indicate that while undifferentiated cells maintain their original orientation, upon early cardiomyogenic differentiation (predifferentiated) CMPCs exhibit a distinct strain avoidance response during 48hrs of cyclic straining in a 2D environment. In 3D unidirectionally constrained hydrogels, undifferentiated CMPCs retain their cardiomyogenic profile. CMPCs cultured in 3D collagen/Matrigel hydrogels respond to static mechanical strains as expected by cell alignment. Conclusions Our results suggest that CMPCs respond to the presence of mechanical stimuli, in this research mimicked by the application of uniaxial (cyclic) strain in 2D and 3D environments, suggesting that CMPCs are indeed mechanosensitive. Although in 2D environments, mechanosensitivity of the CMPCs is dependent on their differentiation status. Our findings provide the first understanding of the ability of human CMPCs to sense mechanical stimuli, which is the first initial step in mechanotransduction. Mechanotransduction is essential for optimal recruitment, migration, and mechanical integration of progenitor cells into the injured myocardium. Therefore, the presented results can contribute to enhance efficacy of current treatments of cardiac disease, as well as to develop novel endogenous regeneration strategies.

Published
2016

9. Anginex, a designed peptide that inhibits angiogenesis

Author

Griffioen, A W, van der Schaft, D W, Barendsz-Janson, A F, Cox, A, Struijker Boudier, H A, Hillen, H F, and Mayo, K H

Subjects
O-(Chloroacetylcarbamoyl)fumagillol, Magnetic Resonance Spectroscopy, Molecular Sequence Data, Neovascularization, Physiologic, Proteins, Plasminogen, Peptide Fragments, Endostatins, Thrombospondin 1, Cell Movement, Cyclohexanes, Cell Adhesion, Humans, Amino Acid Sequence, Collagen, Endothelium, Vascular, Peptides, Angiostatins, Sesquiterpenes, Cell Division, Cells, Cultured, Research Article
Abstract

Novel beta-sheet-forming peptide 33-mers, betapep peptides, have been designed by using a combination approach employing basic folding principles and incorporating short sequences from the beta-sheet domains of anti-angiogenic proteins. One of these designed peptides (betapep-25), named anginex, was observed to be potently anti-angiogenic. Anginex specifically inhibits vascular endothelial cell proliferation and induces apoptosis in these cells, as shown by flow-cytometric detection of sub-diploid cells, TUNEL (terminal deoxyribonucleotidyl transferase-mediated dUTP-nick-end labelling) analysis and cell morphology. Anginex also inhibits endothelial cell adhesion to and migration on different extracellular matrix components. Inhibition of angiogenesis in vitro is demonstrated in the sprout-formation assay and in vivo in the chick embryo chorio-allantoic membrane angiogenesis assay. Comparison of active and inactive betapep sequences allows structure-function relationships to be deduced. Five hydrophobic residues and two lysines appear to be crucial to activity. This is the first report of a designed peptide having a well-defined biological function as a novel cytokine, which may be an effective anti-angiogenic agent for therapeutic use against various pathological disorders, such as neoplasia, rheumatoid arthritis, diabetic retinopathy and restenosis.

Published
2001

11. Poster session 2

Author

Perez-Pomares, J. M., primary, Ruiz-Villalba, A., additional, Ziogas, A., additional, Segovia, J. C., additional, Ehrbar, M., additional, Munoz-Chapuli, R., additional, De La Rosa, A., additional, Dominguez, J. N., additional, Hove-Madsen, L., additional, Sankova, B., additional, Sedmera, D., additional, Franco, D., additional, Aranega Jimenez, A., additional, Babaeva, G., additional, Chizh, N., additional, Galchenko, S., additional, Sandomirsky, B., additional, Schwarzl, M., additional, Seiler, S., additional, Steendijk, P., additional, Huber, S., additional, Maechler, H., additional, Truschnig-Wilders, M., additional, Pieske, B., additional, Post, H., additional, Simrick, S., additional, Kreutzer, R., additional, Rao, C., additional, Terracciano, C. M., additional, Kirchhof, P., additional, Fabritz, L., additional, Brand, T., additional, Theveniau-Ruissy, M., additional, Parisot, P., additional, Francou, A., additional, Saint-Michel, E., additional, Mesbah, K., additional, Kelly, R. G., additional, Wu, H.-T., additional, Sie, S.-S., additional, Chen, C.-Y., additional, Kuan, T.-C., additional, Lin, C. S., additional, Ismailoglu, Z., additional, Guven, M., additional, Yakici, A., additional, Ata, Y., additional, Ozcan, S., additional, Yildirim, E., additional, Ongen, Z., additional, Miroshnikova, V., additional, Demina, E., additional, Rodygina, T., additional, Kurjanov, P., additional, Denisenko, A., additional, Schwarzman, A., additional, Rubanenko, A., additional, Shchukin, Y., additional, Germanov, A., additional, Goldbergova, M., additional, Parenica, J., additional, Lipkova, J., additional, Pavek, N., additional, Kala, P., additional, Poloczek, M., additional, Vasku, A., additional, Parenicova, I., additional, Spinar, J., additional, Gambacciani, C., additional, Chiavacci, E., additional, Evangelista, M., additional, Vesentini, N., additional, Kusmic, C., additional, Pitto, L., additional, Chernova, A., additional, Nikulina, S. U. Y., additional, Arvanitis, D. A., additional, Mourouzis, I., additional, Pantos, C., additional, Kranias, E. G., additional, Cokkinos, D. V., additional, Sanoudou, D., additional, Vladimirskaya, T. E., additional, Shved, I. A., additional, Kryvorot, S. G., additional, Schirmer, I. M., additional, Appukuttan, A., additional, Pott, L., additional, Jaquet, K., additional, Ladilov, Y., additional, Archer, C. R., additional, Bootman, M. D., additional, Roderick, H. L., additional, Fusco, A., additional, Sorriento, D., additional, Santulli, G., additional, Trimarco, B., additional, Iaccarino, G., additional, Hagenmueller, M., additional, Riffel, J., additional, Bernhold, E., additional, Katus, H. A., additional, Hardt, S. E., additional, Maqsood, A., additional, Zi, M., additional, Prehar, S., additional, Neyses, L., additional, Ray, S., additional, Oceandy, D., additional, Khatami, N., additional, Wadowski, P., additional, Wagh, V., additional, Hescheler, J., additional, Sachinidis, A., additional, Mohl, W., additional, Chaudhry, B., additional, Burns, D., additional, Henderson, D. J., additional, Bax, N. A. M., additional, Van Marion, M. H., additional, Shah, B., additional, Goumans, M. J., additional, Bouten, C. V. C., additional, Van Der Schaft, D. W. J., additional, Van Oorschot, A. A. M., additional, Maas, S., additional, Braun, J., additional, Van Tuyn, J., additional, De Vries, A. A. F., additional, Gittenberger-De Groot, A. C., additional, Bageghni, S., additional, Drinkhill, M. J., additional, Batten, T. F. C., additional, Ainscough, J. F. X., additional, Onate, B., additional, Vilahur, G., additional, Ferrer-Lorente, R., additional, Ybarra, J., additional, Diez-Caballero, A., additional, Ballesta-Lopez, C., additional, Moscatiello, F., additional, Herrero, J., additional, Badimon, L., additional, Martin-Rendon, E., additional, Clifford, D. M., additional, Fisher, S. A., additional, Brusnkill, S. J., additional, Doree, C., additional, Mathur, A., additional, Clarke, M., additional, Watt, S. M., additional, Hernandez-Vera, R., additional, Kavanagh, D., additional, Yemm, A. I., additional, Frampton, J., additional, Kalia, N., additional, Terajima, Y., additional, Shimizu, T., additional, Tsuruyama, S., additional, Ishii, H., additional, Sekine, H., additional, Hagiwara, N., additional, Okano, T., additional, Vrijsen, K. R., additional, Chamuleau, S. A. J., additional, Sluijter, J. P. G., additional, Doevendans, P. F. M., additional, Madonna, R., additional, Delli Pizzi, S., additional, Di Donato, L., additional, Mariotti, A., additional, Di Carlo, L., additional, D'ugo, E., additional, Teberino, M. A., additional, Merla, A., additional, T, A., additional, De Caterina, R., additional, Kolker, L., additional, Ali, N. N., additional, Maclellan, K., additional, Moore, M., additional, Wheeler, J., additional, Harding, S. E., additional, Fleck, R. A., additional, Rowlinson, J. M., additional, Kraenkel, N., additional, Ascione, R., additional, Madeddu, P., additional, O'sullivan, J. F., additional, Leblond, A. L., additional, Kelly, G., additional, Kumar, A. H. S., additional, Metharom, P., additional, Buneker, C. K., additional, Alizadeh-Vikali, N., additional, Hynes, B. G., additional, O'connor, R., additional, Caplice, N. M., additional, Noseda, M., additional, De Smith, A. J., additional, Leja, T., additional, Rao, P. H., additional, Al-Beidh, F., additional, Abreu Pavia, M. S., additional, Blakemore, A. I., additional, Schneider, M. D., additional, Stathopoulou, K., additional, Cuello, F., additional, Ehler, E., additional, Haworth, R. S., additional, Avkiran, M., additional, Morawietz, H., additional, Eickholt, C., additional, Langbein, H., additional, Brux, M., additional, Goettsch, C., additional, Goettsch, W., additional, Arsov, A., additional, Brunssen, C., additional, Mazilu, L., additional, Parepa, I. R., additional, Suceveanu, A. I., additional, Suceveanu, A. P., additional, De Man, F. S., additional, Guignabert, C., additional, Tu, L., additional, Handoko, M. L., additional, Schalij, I., additional, Fadel, E., additional, Postmus, P. E., additional, Vonk-Noordegraaf, A., additional, Humbert, M., additional, Eddahibi, S., additional, Del Giudice, C., additional, Anastasio, A., additional, Fazal, L., additional, Azibani, F., additional, Bihry, N., additional, Merval, R., additional, Polidano, E., additional, Samuel, J.-L., additional, Delcayre, C., additional, Zhang, Y., additional, Mi, Y. M., additional, Ren, L. L., additional, Cheng, Y. P., additional, Guo, R., additional, Liu, Y., additional, Jiang, Y. N., additional, Kokkinos, A. D., additional, Tretjakovs, P., additional, Jurka, A., additional, Bormane, I., additional, Mikelsone, I., additional, Reihmane, D., additional, Elksne, K., additional, Krievina, G., additional, Verbovenko, J., additional, Bahs, G., additional, Lopez-Andres, N., additional, Rousseau, A., additional, Calvier, L., additional, Akhtar, R., additional, Labat, C., additional, Cruickshank, K., additional, Diez, J., additional, Zannad, F., additional, Lacolley, P., additional, Rossignol, P., additional, Hamesch, K., additional, Subramanian, P., additional, Li, X., additional, Thiemann, A., additional, Heyll, K., additional, Dembowsky, K., additional, Chevalier, E., additional, Weber, C., additional, Schober, A., additional, Yang, L., additional, Kim, G., additional, Gardner, B., additional, Earley, J., additional, Hofmann-Bowman, M., additional, Cheng, C.-F., additional, Lian, W.-S., additional, Lin, H., additional, Jinjolia, N. J., additional, Abuladze, G. A., additional, Tvalchrelidze, S. H. T., additional, Khamnagadaev, I., additional, Shkolnikova, M., additional, Kokov, L., additional, Miklashevich, I., additional, Drozdov, I., additional, Ilyich, I., additional, Bingen, B. O., additional, Askar, S. F. A., additional, Ypey, D. L., additional, Van Der Laarse, A., additional, Schalij, M. J., additional, Pijnappels, D. A., additional, Roney, C. H., additional, Ng, F. S., additional, Chowdhury, R. A., additional, Chang, E. T. Y., additional, Patel, P. M., additional, Lyon, A. R., additional, Siggers, J. H., additional, Peters, N. S., additional, Obergrussberger, A., additional, Stoelzle, S., additional, Bruggemann, A., additional, Haarmann, C., additional, George, M., additional, Fertig, N., additional, Moreira, D., additional, Souza, A., additional, Valente, P., additional, Kornej, J., additional, Reihardt, C., additional, Kosiuk, J., additional, Arya, A., additional, Hindricks, G., additional, Adams, V., additional, Husser, D., additional, Bollmann, A., additional, Camelliti, P., additional, Dudhia, J., additional, Dias, P., additional, Cartledge, J., additional, Connolly, D. J., additional, Nobles, M., additional, Sebastian, S., additional, Tinker, A., additional, Opel, A., additional, Daimi, H., additional, Haj Khelil, A., additional, Be Chibani, J., additional, Barana, A., additional, Amoros, I., additional, Gonzalez De La Fuente, M., additional, Caballero, R., additional, Aranega, A., additional, Kelly, A., additional, Bernus, O., additional, Kemi, O. J., additional, Myles, R. C., additional, Ghouri, I. A., additional, Burton, F. L., additional, Smith, G. L., additional, Del Lungo, M., additional, Sartiani, L., additional, Spinelli, V., additional, Baruscotti, M., additional, Difrancesco, D., additional, Mugelli, A., additional, Cerbai, E., additional, Thomas, A. M., additional, Aziz, Q., additional, Khambra, T., additional, Addlestone, J. M. A., additional, Cartwright, E. J., additional, Wilkinson, R., additional, Song, W., additional, Marston, S., additional, Jacquet, A., additional, Mougenot, N. M., additional, Lipskaia, A. J., additional, Paalberends, E. R., additional, Stam, K., additional, Van Dijk, S. J., additional, Van Slegtenhorst, M., additional, Dos Remedios, C., additional, Ten Cate, F. J., additional, Michels, M., additional, Niessen, H. W. M., additional, Stienen, G. J. M., additional, Van Der Velden, J., additional, Read, M. I., additional, Andreianova, A. A., additional, Harrison, J. C., additional, Goulton, C. S., additional, Kerr, D. S., additional, Sammut, I. A., additional, Wallner, M., additional, Von Lewinski, D., additional, Kindsvater, D., additional, Saes, M., additional, Morano, I., additional, Muegge, A., additional, Buyandelger, B., additional, Kostin, S., additional, Gunkel, S., additional, Vouffo, J., additional, Ng, K., additional, Chen, J., additional, Eilers, M., additional, Isaacson, R., additional, Milting, H., additional, Knoell, R., additional, Cattin, M.-E., additional, Crocini, C., additional, Schlossarek, S., additional, Maron, S., additional, Hansen, A., additional, Eschenhagen, T., additional, Carrier, L., additional, Bonne, G., additional, Coppini, R., additional, Ferrantini, C., additional, Olivotto, I., additional, Belardinelli, L., additional, Poggesi, C., additional, Leung, M. C., additional, Messer, A. E., additional, Copeland, O., additional, Marston, S. B., additional, Mills, A. M., additional, Collins, T., additional, O'gara, P., additional, Thum, T., additional, Regalla, K., additional, Macleod, K. T., additional, Prodromakis, T., additional, Chaudhry, U., additional, Darzi, A., additional, Yacoub, M. H., additional, Athanasiou, T., additional, Bogdanova, A., additional, Makhro, A., additional, Hoydal, M., additional, Stolen, T. O., additional, Johnssen, A. B., additional, Alves, M., additional, Catalucci, D., additional, Condorelli, G., additional, Koch, L. G., additional, Britton, S. L., additional, Wisloff, U., additional, Bito, V., additional, Claus, P., additional, Vermeulen, K., additional, Huysmans, C., additional, Ventura-Clapier, R., additional, Sipido, K. R., additional, Seliuk, M. N., additional, Burlaka, A. P., additional, Sidorik, E. P., additional, Khaitovych, N. V., additional, Kozachok, M. M., additional, Potaskalova, V. S., additional, Driesen, R. B., additional, Galan, D. T., additional, De Paulis, D., additional, Arnoux, T., additional, Schaller, S., additional, Pruss, R. M., additional, Poitz, D. M., additional, Augstein, A., additional, Braun-Dullaeus, R. C., additional, Schmeisser, A., additional, Strasser, R. H., additional, Micova, P., additional, Balkova, P., additional, Hlavackova, M., additional, Zurmanova, J., additional, Kasparova, D., additional, Kolar, F., additional, Neckar, J., additional, Novak, F., additional, Novakova, O., additional, Pollard, S., additional, Babba, M., additional, Hussain, A., additional, James, R., additional, Maddock, H., additional, Alshehri, A. S., additional, Baxter, G. F., additional, Dietel, B., additional, Altendorf, R., additional, Daniel, W. G., additional, Kollmar, R., additional, Garlichs, C. D., additional, Sirohi, R., additional, Roberts, N., additional, Lawrence, D., additional, Sheikh, A., additional, Kolvekar, S., additional, Yap, J., additional, Arend, M., additional, Walkinshaw, G., additional, Hausenloy, D. J., additional, Yellon, D. M., additional, Posa, A., additional, Szabo, R., additional, Szalai, Z., additional, Szablics, P., additional, Berko, M. A., additional, Orban, K., additional, Murlasits, Z. S., additional, Balogh, L., additional, Varga, C., additional, Ku, H. C., additional, Su, M. J., additional, Chreih, R.-M., additional, Ginghina, C., additional, Deleanu, D., additional, Ferreira, A. L. B. J., additional, Belal, A., additional, Ali, M. A., additional, Fan, X., additional, Holt, A., additional, Campbell, R., additional, Schulz, R., additional, Bonanad, C., additional, Bodi, V., additional, Sanchis, J., additional, Morales, J. M., additional, Marrachelli, V., additional, Nunez, J., additional, Forteza, M. J., additional, Chaustre, F., additional, Gomez, C., additional, Chorro, F. J., additional, Csont, T., additional, Fekete, V., additional, Murlasits, Z., additional, Aypar, E., additional, Bencsik, P., additional, Sarkozy, M., additional, Varga, Z. V., additional, Ferdinandy, P., additional, Duerr, G. D., additional, Zoerlein, M., additional, Dewald, D., additional, Mesenholl, B., additional, Schneider, P., additional, Ghanem, A., additional, Rittling, S., additional, Welz, A., additional, Dewald, O., additional, Becker, E., additional, Peigney, C., additional, Bouleti, C., additional, Galaup, A., additional, Monnot, C., additional, Ghaleh, B., additional, Germain, S., additional, Timmermans, A., additional, Ginion, A., additional, De Meester, C., additional, Sakamoto, K., additional, Vanoverschelde, J.-L., additional, Horman, S., additional, Beauloye, C., additional, Bertrand, L., additional, Maroz-Vadalazhskaya, N., additional, Drozd, E., additional, Kukharenko, L., additional, Russkich, I., additional, Krachak, D., additional, Seljun, Y., additional, Ostrovski, Y., additional, Martin, A.-C., additional, Le Bonniec, B., additional, Lecompte, T., additional, Dizier, B., additional, Emmerich, J., additional, Fischer, A.-M., additional, Samama, C.-M., additional, Godier, A., additional, Mogensen, S., additional, Furchtbauer, E. M., additional, Aalkjaer, C., additional, Choong, W. L., additional, Jovanovic, A., additional, Khan, F., additional, Daniel, J. M., additional, Dutzmann, J. M., additional, Widmer-Teske, R., additional, Guenduez, D., additional, Sedding, D., additional, Castro, M. M., additional, Cena, J. J. C., additional, Cho, W. J. C., additional, Goobie, G. G., additional, Walsh, M. P. W., additional, Schulz, R. S., additional, Dutzmann, J., additional, Preissner, K. T., additional, Sones, W., additional, Kotlikoff, M., additional, Serizawa, K., additional, Yogo, K., additional, Aizawa, K., additional, Hirata, M., additional, Tashiro, Y., additional, Ishizuka, N., additional, Varela, A., additional, Katsiboulas, M., additional, Tousoulis, D., additional, Papaioannou, T. G., additional, Vaina, S., additional, Davos, C. H., additional, Piperi, C., additional, Stefanadis, C., additional, Basdra, E. K., additional, Papavassiliou, A. G., additional, Hermenegildo, C., additional, Lazaro-Franco, M., additional, Sobrino, A., additional, Bueno-Beti, C., additional, Martinez-Gil, N., additional, Walther, T., additional, Peiro, C., additional, Sanchez-Ferrer, C. F., additional, Novella, S., additional, Ciccarelli, M., additional, Franco, A., additional, Dorn, G. W., additional, Cseplo, P., additional, Torok, O., additional, Springo, Z. S., additional, Vamos, Z., additional, Kosa, D., additional, Hamar, J., additional, Koller, A., additional, Bubb, K. J., additional, Ahluwalia, A., additional, Stepien, E. L., additional, Gruca, A., additional, Grzybowska, J., additional, Goralska, J., additional, Dembinska-Kiec, A., additional, Stolinski, J., additional, Partyka, L., additional, Zhang, H., additional, Sweeney, D., additional, Thomas, G. N., additional, Fish, P. V., additional, Taggart, D. P., additional, Cioffi, S., additional, Bilio, M., additional, Martucciello, S., additional, Illingworth, E., additional, Caporali, A., additional, Shantikumar, S., additional, Marchetti, M., additional, Martelli, F., additional, Emanueli, C., additional, Meloni, M., additional, Al Haj Zen, A., additional, Sala-Newby, G., additional, Del Turco, S., additional, Saponaro, C., additional, Dario, B., additional, Sartini, S., additional, Menciassi, A., additional, Dario, P., additional, La Motta, C., additional, Basta, G., additional, Santiemma, V., additional, Bertone, C., additional, Rossi, F., additional, Michelon, E., additional, Bianco, M. J., additional, Castelli, A., additional, Shin, D. I., additional, Seung, K. B., additional, Seo, S. M., additional, Park, H. J., additional, Kim, P. J., additional, Baek, S. H., additional, Choi, Y. S., additional, Her, S. H., additional, Kim, D. B., additional, Lee, J. M., additional, Park, C. S., additional, Rocchiccioli, S., additional, Cecchettini, A., additional, Pelosi, G., additional, Citti, L., additional, Parodi, O., additional, Trivella, M. G., additional, Michel-Monigadon, D., additional, Burger, F., additional, Dunoyer-Geindre, S., additional, Pelli, G., additional, Cravatt, B., additional, Steffens, S., additional, Didangelos, A., additional, Mayr, U., additional, Yin, X., additional, Stegemann, C., additional, Shalhoub, J., additional, Davies, A. H., additional, Monaco, C., additional, Mayr, M., additional, Lypovetska, S., additional, Grytsenko, S., additional, Njerve, I. U., additional, Pettersen, A. A., additional, Opstad, T. B., additional, Bratseth, V., additional, Arnesen, H., additional, Seljeflot, I., additional, Dumitriu, I. E., additional, Baruah, P., additional, Antunes, R. F., additional, Kaski, J. C., additional, Trapero, I., additional, Benet, I., additional, Alguero, C., additional, Chaustre, F. J., additional, Mangold, A., additional, Puthenkalam, S., additional, Distelmaier, K., additional, Adlbrecht, C., additional, Lang, I. M., additional, Koizumi, T., additional, Inoue, I., additional, Komiyama, N., additional, Nishimura, S., additional, Korneeva, O. N., additional, Drapkina, O. M., additional, Fornai, L., additional, Angelini, A., additional, Kiss, A., additional, Giskes, F., additional, Eijkel, G., additional, Fedrigo, M., additional, Valente, M. L., additional, Thiene, G., additional, Heeren, R. M. A., additional, Padro, T., additional, Casani, L., additional, Suades, R., additional, Bertoni, B., additional, Carminati, R., additional, Carlini, V., additional, Pettinari, L., additional, Martinelli, C., additional, Gagliano, N., additional, Noppe, G., additional, Buchlin, P., additional, Marquet, N., additional, Baeyens, N., additional, Morel, N., additional, Baysa, A., additional, Sagave, J., additional, Dahl, C. P., additional, Gullestad, L., additional, Carpi, A., additional, Di Lisa, F., additional, Giorgio, M., additional, Vaage, J., additional, Valen, G., additional, Vafiadaki, E., additional, Papalouka, V., additional, Terzis, G., additional, Spengos, K., additional, Manta, P., additional, Gales, C., additional, Genet, G., additional, Dague, E., additional, Cazorla, O., additional, Payre, B., additional, Mias, C., additional, Ouille, A., additional, Lacampagne, A., additional, Pathak, A., additional, Senard, J. M., additional, Abonnenc, M., additional, Da Costa Martins, P., additional, Srivastava, S., additional, Gautel, M., additional, De Windt, L., additional, Comelli, L., additional, Lande, C., additional, Ucciferri, N., additional, Ikonen, L., additional, Vuorenpaa, H., additional, Kujala, K., additional, Sarkanen, J.-R., additional, Heinonen, T., additional, Ylikomi, T., additional, Aalto-Setala, K., additional, Capros, H., additional, Sprincean, N., additional, Usurelu, N., additional, Egorov, V., additional, Stratu, N., additional, Matchkov, V., additional, Bouzinova, E., additional, Moeller-Nielsen, N., additional, Wiborg, O., additional, Gutierrez, P. S., additional, Aparecida-Silva, R., additional, Borges, L. F., additional, Moreira, L. F. P., additional, Dias, R. R., additional, Kalil, J., additional, Stolf, N. A. G., additional, Zhou, W., additional, Suntharalingam, K., additional, Brand, N., additional, Vilar Compte, R., additional, Ying, L., additional, Bicknell, K., additional, Dannoura, A., additional, Dash, P., additional, Brooks, G., additional, Tsimafeyeu, I., additional, Tishova, Y., additional, Wynn, N., additional, Oyeyipo, I. P., additional, Olatunji, L. A., additional, Maegdefessel, L., additional, Azuma, J., additional, Toh, R., additional, Raaz, U., additional, Merk, D. R., additional, Deng, A., additional, Spin, J. M., additional, Tsao, P. S., additional, Tedeschi, L., additional, Taranta, M., additional, Naldi, I., additional, Grimaldi, S., additional, Cinti, C., additional, Bousquenaud, M., additional, Maskali, F., additional, Poussier, S., additional, Marie, P. Y., additional, Boutley, H., additional, Karcher, G., additional, Wagner, D. R., additional, Devaux, Y., additional, Torre, I., additional, Psilodimitrakopoulos, S., additional, Iruretagoiena, I., additional, Gonzalez-Tendero, A., additional, Artigas, D., additional, Loza-Alvarez, P., additional, Gratacos, E., additional, Amat-Roldan, I., additional, Murray, L., additional, Carberry, D. M., additional, Dunton, P., additional, Miles, M. J., additional, Suleiman, M.-S., additional, Kanesalingam, K., additional, Taylor, R., additional, Mc Collum, C. N., additional, Parniczky, A., additional, Solymar, M., additional, Porpaczy, A., additional, Miseta, A., additional, Lenkey, Z. S., additional, Szabados, S., additional, Cziraki, A., additional, Garai, J., additional, Myloslavska, I., additional, Menazza, S. M., additional, Canton, M. C., additional, Di Lisa, F. D. L., additional, Oliveira, S. H. V., additional, Morais, C. A. S., additional, Miranda, M. R., additional, Oliveira, T. T., additional, Lamego, M. R. A., additional, Lima, L. M., additional, Goncharova, N. S., additional, Naymushin, A. V., additional, Kazimli, A. V., additional, Moiseeva, O. M., additional, Carvalho, M. G., additional, Sabino, A. P., additional, Mota, A. P. L., additional, Sousa, M. O., additional, Niessner, A., additional, Richter, B., additional, Hohensinner, P. J., additional, Rychli, K., additional, Zorn, G., additional, Berger, R., additional, Moertl, D., additional, Pacher, R., additional, Wojta, J., additional, Huelsmann, M., additional, Kukharchik, G., additional, Nesterova, N., additional, Pavlova, A., additional, Gaykovaya, L., additional, Krapivka, N., additional, Konstantinova, I., additional, Sichinava, L., additional, Prapa, S., additional, Mccarthy, K. P., additional, Kilner, P. J., additional, Xu, X. Y., additional, Johnson, M. R., additional, Ho, S. Y., additional, Gatzoulis, M. A., additional, Stoupel, E. G., additional, Garcia, R., additional, Merino, D., additional, Montalvo, C., additional, Hurle, M. A., additional, Nistal, J. F., additional, Villar, A. V., additional, Perez-Moreno, A., additional, Gilabert, R., additional, and Ros, E., additional

Published
2012
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18. The S. cerevisiae SET3 complex includes two histone deacetylases, Hos2 and Hst1, and is a meiotic-specific repressor of the sporulation gene program.

Author

Pijnappel, W W, Schaft, D, Roguev, A, Shevchenko, A, Tekotte, H, Wilm, M, Rigaut, G, Séraphin, B, Aasland, R, and Stewart, A F

Abstract

Set3 is one of two proteins in the yeast Saccharomyces cerevisiae that, like Drosophila Trithorax, contains both SET and PHD domains. We found that Set3 forms a single complex, Set3C, with Snt1, YIL112w, Sif2, Cpr1, and two putative histone deacetylases, Hos2 and NAD-dependent Hst1. Set3C includes NAD-dependent and independent deacetylase activities when assayed in vitro. Homology searches suggest that Set3C is the yeast analog of the mammalian HDAC3/SMRT complex. Set3C represses genes in early/middle of the yeast sporulation program, including the key meiotic regulators ime2 and ndt80. Whereas Hos2 is only found in Set3C, Hst1 is also present in a complex with Sum1, supporting previous characterizations of Hst1 and Sum1 as repressors of middle sporulation genes during vegetative growth. However, Hst1 is not required for meiotic repression by Set3C, thus implying that Set3C (-Hst1) and not Hst1-Sum1, is the meiotic-specific repressor of early/middle sporulation genes.

Published
2001
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20. Essential environmental cues from the satellite cell niche: optimizing proliferation and differentiation.

Author

Boonen KJ, Rosaria-Chak KY, Baaijens FP, van der Schaft DW, and Post MJ

Subjects
Animals, Basement Membrane chemistry, Cells, Cultured, Collagen metabolism, Collagen Type IV metabolism, Drug Combinations, Elasticity, Laminin metabolism, Male, Mice, Mice, Inbred C57BL, Polylysine metabolism, Proteoglycans metabolism, Time Factors, Basement Membrane metabolism, Cell Differentiation, Cell Proliferation, Muscle Development, Muscle Fibers, Skeletal metabolism, Satellite Cells, Skeletal Muscle metabolism, Signal Transduction
Abstract

The use of muscle progenitor cells (MPCs) for regenerative medicine has been severely compromised by their decreased proliferative and differentiative capacity after being cultured in vitro. We hypothesized the loss of pivotal niche factors to be the cause. Therefore, we investigated the proliferative and differentiative response of passage 0 murine MPCs to varying substrate elasticities and protein coatings and found that proliferation was influenced only by elasticity, whereas differentiation was influenced by both elasticity and protein coating. A stiffness of 21 kPa optimally increased the proliferation of MPCs. Regarding differentiation, we demonstrated that fusion of MPCs into myotubes takes place regardless of elasticity. However, ongoing maturation with cross-striations and contractions occurred only on elasticities higher than 3 kPa. Furthermore, maturation was fastest on poly-d-lysine and laminin coatings.

Published
2009
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21. Chromatin Central: towards the comparative proteome by accurate mapping of the yeast proteomic environment.

Author

Shevchenko A, Roguev A, Schaft D, Buchanan L, Habermann B, Sakalar C, Thomas H, Krogan NJ, Shevchenko A, and Stewart AF

Subjects
Proteomics, Protein Interaction Mapping, Saccharomyces cerevisiae chemistry, Saccharomyces cerevisiae Proteins analysis, Schizosaccharomyces chemistry, Schizosaccharomyces pombe Proteins analysis
Abstract

Background: Understanding the design logic of living systems requires the understanding and comparison of proteomes. Proteomes define the commonalities between organisms more precisely than genomic sequences. Because uncertainties remain regarding the accuracy of proteomic data, several issues need to be resolved before comparative proteomics can be fruitful., Results: The Saccharomyces cerevisiae proteome presents the highest quality proteomic data available. To evaluate the accuracy of these data, we intensively mapped a proteomic environment, termed 'Chromatin Central', which encompasses eight protein complexes, including the major histone acetyltransferases and deacetylases, interconnected by twelve proteomic hyperlinks. Using sequential tagging and a new method to eliminate background, we confirmed existing data but also uncovered new subunits and three new complexes, including ASTRA, which we suggest is a widely conserved aspect of telomeric maintenance, and two new variations of Rpd3 histone deacetylase complexes. We also examined the same environment in fission yeast and found a very similar architecture based on a scaffold of orthologues comprising about two-thirds of all proteins involved, whereas the remaining one-third is less constrained. Notably, most of the divergent hyperlinks were found to be due to gene duplications, hence providing a mechanism for the fixation of gene duplications in evolution., Conclusions: We define several prerequisites for comparative proteomics and apply them to examine a proteomic environment in unprecedented detail. We suggest that high resolution mapping of proteomic environments will deliver the highest quality data for comparative proteomics.

Published
2008
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22. An Nkx2-5/Bmp2/Smad1 negative feedback loop controls heart progenitor specification and proliferation.

Author

Prall OW, Menon MK, Solloway MJ, Watanabe Y, Zaffran S, Bajolle F, Biben C, McBride JJ, Robertson BR, Chaulet H, Stennard FA, Wise N, Schaft D, Wolstein O, Furtado MB, Shiratori H, Chien KR, Hamada H, Black BL, Saga Y, Robertson EJ, Buckingham ME, and Harvey RP

Subjects
Animals, Bone Morphogenetic Protein 2, Cell Proliferation, DNA, Complementary, Embryo, Mammalian, Heart embryology, Heart Defects, Congenital genetics, Heart Defects, Congenital metabolism, Homeobox Protein Nkx-2.5, Homeodomain Proteins genetics, Humans, LIM-Homeodomain Proteins, Mice, Multipotent Stem Cells metabolism, Myocytes, Cardiac metabolism, Oligonucleotide Array Sequence Analysis, Phenotype, Transcription Factors genetics, Bone Morphogenetic Proteins metabolism, Feedback, Physiological, Homeodomain Proteins metabolism, Multipotent Stem Cells cytology, Myocardium cytology, Myocytes, Cardiac cytology, Smad1 Protein metabolism, Transcription Factors metabolism, Transforming Growth Factor beta metabolism
Abstract

During heart development the second heart field (SHF) provides progenitor cells for most cardiomyocytes and expresses the homeodomain factor Nkx2-5. We now show that feedback repression of Bmp2/Smad1 signaling by Nkx2-5 critically regulates SHF proliferation and outflow tract (OFT) morphology. In the cardiac fields of Nkx2-5 mutants, genes controlling cardiac specification (including Bmp2) and maintenance of the progenitor state were upregulated, leading initially to progenitor overspecification, but subsequently to failed SHF proliferation and OFT truncation. In Smad1 mutants, SHF proliferation and deployment to the OFT were increased, while Smad1 deletion in Nkx2-5 mutants rescued SHF proliferation and OFT development. In Nkx2-5 hypomorphic mice, which recapitulate human congenital heart disease (CHD), OFT anomalies were also rescued by Smad1 deletion. Our findings demonstrate that Nkx2-5 orchestrates the transition between periods of cardiac induction, progenitor proliferation, and OFT morphogenesis via a Smad1-dependent negative feedback loop, which may be a frequent molecular target in CHD.

Published
2007
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23. Protein interactions within the Set1 complex and their roles in the regulation of histone 3 lysine 4 methylation.

Author

Dehé PM, Dichtl B, Schaft D, Roguev A, Pamblanco M, Lebrun R, Rodríguez-Gil A, Mkandawire M, Landsberg K, Shevchenko A, Shevchenko A, Rosaleny LE, Tordera V, Chávez S, Stewart AF, and Géli V

Subjects
Gene Expression Regulation, Fungal, Histone-Lysine N-Methyltransferase, Histones chemistry, Methylation, Protein Binding, Protein Subunits, DNA-Binding Proteins metabolism, Histones metabolism, Lysine metabolism, Saccharomyces cerevisiae metabolism, Saccharomyces cerevisiae Proteins metabolism, Transcription Factors metabolism
Abstract

Set1 is the catalytic subunit and the central component of the evolutionarily conserved Set1 complex (Set1C) that methylates histone 3 lysine 4 (H3K4). Here we have determined protein/protein interactions within the complex and related the substructure to function. The loss of individual Set1C subunits differentially affects Set1 stability, complex integrity, global H3K4 methylation, and distribution of H3K4 methylation along active genes. The complex requires Set1, Swd1, and Swd3 for integrity, and Set1 amount is greatly reduced in the absence of the Swd1-Swd3 heterodimer. Bre2 and Sdc1 also form a heteromeric subunit, which requires the SET domain for interaction with the complex, and Sdc1 strongly interacts with itself. Inactivation of either Bre2 or Sdc1 has very similar effects. Neither is required for complex integrity, and their removal results in an increase of H3K4 mono- and dimethylation and a severe decrease of trimethylation at the 5' end of active coding regions but a decrease of H3K4 dimethylation at the 3' end of coding regions. Cells lacking Spp1 have a reduced amount of Set1 and retain a fraction of trimethylated H3K4, whereas cells lacking Shg1 show slightly elevated levels of both di- and trimethylation. Set1C associates with both serine 5- and serine 2-phosphorylated forms of polymerase II, indicating that the association persists to the 3' end of transcribed genes. Taken together, our results suggest that Set1C subunits stimulate Set1 catalytic activity all along active genes.

Published
2006
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24. Dynamic contrast-enhanced magnetic resonance imaging at 1.5 Tesla with gadopentetate dimeglumine to assess the angiostatic effects of anginex in mice.

Author

de Lussanet QG, Beets-Tan RG, Backes WH, van der Schaft DW, van Engelshoven JM, Mayo KH, and Griffioen AW

Subjects
Animals, Contrast Media, Gadolinium DTPA, Magnetic Resonance Imaging methods, Melanoma drug therapy, Mice, Mice, Inbred C57BL, Neovascularization, Pathologic diagnosis, Peptides, Proteins, Angiogenesis Inhibitors therapeutic use, Melanoma blood supply, Neovascularization, Pathologic prevention & control
Abstract

The purpose of this study was to evaluate the effects of anginex on tumour angiogenesis assessed by dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) on a clinical 1.5 Tesla MR system and with the clinically available contrast agent gadopentetate dimeglumine. C57BL/6 mice carrying B16F10 melanomas were treated with anginex, TNP-470 or saline. Tumour growth curves and microvessel density (MVD) were recorded to establish the effects of treatment. DCE-MRI was performed on day 16 after tumour inoculation, and the endothelial transfer coefficients of the microvessel permeability surface-area product (K(PS)) were calculated using a two-compartment model. Both anginex and TNP-470 resulted in smaller tumour volumes (P<0.0001) and lower MVD (P <0.05) compared to saline. Treatment with anginex resulted in a 64% reduction (P<0.01) of tumour K(PS) and TNP-470 resulted in a 44% reduction (P=0.17), compared to saline. DCE-MRI with a clinically available, small-molecular contrast agent can therefore be used to evaluate the angiostatic effects of anginex and TNP-470 on tumour angiogenesis.

Published
2004
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25. A comparative analysis of an orthologous proteomic environment in the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe.

Author

Roguev A, Shevchenko A, Schaft D, Thomas H, Stewart AF, and Shevchenko A

Subjects
Histone-Lysine N-Methyltransferase, Methylation, Protein Binding, Proteome metabolism, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, DNA-Binding Proteins metabolism, Saccharomyces cerevisiae metabolism, Saccharomyces cerevisiae Proteins metabolism, Schizosaccharomyces metabolism, Schizosaccharomyces pombe Proteins metabolism, Transcription Factors metabolism
Abstract

The sequential application of protein tagging, affinity purification, and mass spectrometry enables highly accurate charting of proteomic environments by the characterization of stable protein assemblies and the identification of subunits that are shared between two or more protein complexes, termed here "proteomic hyperlinks." We have charted the proteomic environments surrounding the histone methyltransferase, Set1, in both yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe. Although the composition of these nonessential Set1 complexes is remarkably conserved, they differ with respect to their hyperlinks to their proteomic environments. We speculate that conservation of the core components of protein assemblies and variability of hyperlinks represents a general principle in the molecular organization of eukaryotic proteomes.

Published
2004
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26. High conservation of the Set1/Rad6 axis of histone 3 lysine 4 methylation in budding and fission yeasts.

Author

Roguev A, Schaft D, Shevchenko A, Aasland R, Shevchenko A, and Stewart AF

Subjects
DNA-Binding Proteins chemistry, Histone-Lysine N-Methyltransferase, Histones chemistry, Ligases chemistry, Mass Spectrometry, Methylation, Saccharomyces cerevisiae Proteins chemistry, Transcription Factors chemistry, Ubiquitin-Conjugating Enzymes, DNA-Binding Proteins metabolism, Histones metabolism, Ligases metabolism, Lysine metabolism, Saccharomyces cerevisiae metabolism, Saccharomyces cerevisiae Proteins metabolism, Schizosaccharomyces metabolism, Transcription Factors metabolism
Abstract

Histone 3 lysine 4 (H3 Lys(4)) methylation in Saccharomyces cerevisiae is mediated by the Set1 complex (Set1C) and is dependent upon ubiquitinylation of H2B by Rad6. Mutually exclusive methylation of H3 at Lys(4) or Lys(9) is central to chromatin regulation; however, S. cerevisiae lacks Lys(9) methylation. Furthermore, a different H3 Lys(4) methylase, Set 7/9, has been identified in mammals, thereby questioning the relevance of the S. cerevisiae findings for eukaryotes in general. We report that the majority of Lys(4) methylation in Schizosaccharomyces pombe, like in S. cerevisiae, is mediated by Set1C and is Rad6-dependent. S. pombe Set1C mediates H3 Lys(4) methylation in vitro and contains the same eight subunits found in S. cerevisiae, including the homologue of the Drosophila trithorax Group protein, Ash2. Three additional features of S. pombe Set1C each involve PHD fingers. Notably, the Spp1 subunit is dispensable for H3 Lys(4) methylation in budding yeast but required in fission yeast, and Sp&#95;Set1C has a novel proteomic hyperlink to a new complex that includes the homologue of another trithorax Group protein, Lid (little imaginal discs). Thus, we infer that Set1C is highly conserved in eukaryotes but observe that its links to the proteome are not.

Published
2003
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27. Deciphering protein complexes and protein interaction networks by tandem affinity purification and mass spectrometry: analytical perspective.

Author

Shevchenko A, Schaft D, Roguev A, Pijnappel WW, Stewart AF, and Shevchenko A

Subjects
Peptide Mapping methods, Proteome genetics, Saccharomyces cerevisiae chemistry, Saccharomyces cerevisiae genetics, Saccharomyces cerevisiae Proteins genetics, Saccharomyces cerevisiae Proteins isolation & purification, Two-Hybrid System Techniques, Chromatography, Affinity methods, Mass Spectrometry methods, Proteome isolation & purification
Abstract

We employed a combination of tandem affinity purification and mass spectrometry for deciphering protein complexes and the protein interaction network in budding yeast. 53 genes were epitope-tagged, and their interaction partners were isolated by two-step immunoaffinity chromatography from whole cell lysates. 38 baits pulled down a total of 220 interaction partners, which are members of 19 functionally distinct protein complexes. We identified four proteins shared between complexes of different functionality thus charting segments of a protein interaction network. Concordance with the results of genome-wide two-hybrid screening was poor (14% of identified interactors overlapped) suggesting that the two approaches may provide complementary views on physical interactions within the proteome.

Published
2002
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28. The Saccharomyces cerevisiae Set1 complex includes an Ash2 homologue and methylates histone 3 lysine 4.

Author

Roguev A, Schaft D, Shevchenko A, Pijnappel WW, Wilm M, Aasland R, and Stewart AF

Subjects
Amino Acid Sequence, Base Sequence, Blotting, Southern, DNA Primers, DNA-Binding Proteins chemistry, Histone-Lysine N-Methyltransferase, Histones chemistry, Methylation, Molecular Sequence Data, Saccharomyces cerevisiae Proteins chemistry, Sequence Homology, Amino Acid, Transcription Factors chemistry, DNA-Binding Proteins metabolism, Histones metabolism, Lysine metabolism, Saccharomyces cerevisiae metabolism, Saccharomyces cerevisiae Proteins metabolism, Transcription Factors metabolism
Abstract

The SET domain proteins, SUV39 and G9a have recently been shown to be histone methyltransferases specific for lysines 9 and 27 (G9a only) of histone 3 (H3). The SET domains of the Saccharomyces cerevisiae Set1 and Drosophila trithorax proteins are closely related to each other but distinct from SUV39 and G9a. We characterized the complex associated with Set1 and Set1C and found that it is comprised of eight members, one of which, Bre2, is homologous to the trithorax-group (trxG) protein, Ash2. Set1C requires Set1 for complex integrity and mutation of Set1 and Set1C components shortens telomeres. One Set1C member, Swd2/Cpf10 is also present in cleavage polyadenylation factor (CPF). Set1C methylates lysine 4 of H3, thus adding a new specificity and a new subclass of SET domain proteins known to methyltransferases. Since methylation of H3 lysine 4 is widespread in eukaryotes, we screened the databases and found other Set1 homologues. We propose that eukaryotic Set1Cs are H3 lysine 4 methyltransferases and are related to trxG action through association with Ash2 homologues.

Published
2001
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29. Anginex, a designed peptide that inhibits angiogenesis.

Author

Griffioen AW, van der Schaft DW, Barendsz-Janson AF, Cox A, Struijker Boudier HA, Hillen HF, and Mayo KH

Subjects
Amino Acid Sequence, Angiostatins, Cell Adhesion drug effects, Cell Division drug effects, Cell Movement drug effects, Cells, Cultured, Collagen pharmacology, Cyclohexanes, Endostatins, Endothelium, Vascular drug effects, Humans, Magnetic Resonance Spectroscopy, Molecular Sequence Data, O-(Chloroacetylcarbamoyl)fumagillol, Peptide Fragments pharmacology, Peptides, Plasminogen pharmacology, Proteins pharmacology, Sesquiterpenes pharmacology, Thrombospondin 1 pharmacology, Neovascularization, Physiologic drug effects, Proteins chemical synthesis
Abstract

Novel beta-sheet-forming peptide 33-mers, betapep peptides, have been designed by using a combination approach employing basic folding principles and incorporating short sequences from the beta-sheet domains of anti-angiogenic proteins. One of these designed peptides (betapep-25), named anginex, was observed to be potently anti-angiogenic. Anginex specifically inhibits vascular endothelial cell proliferation and induces apoptosis in these cells, as shown by flow-cytometric detection of sub-diploid cells, TUNEL (terminal deoxyribonucleotidyl transferase-mediated dUTP-nick-end labelling) analysis and cell morphology. Anginex also inhibits endothelial cell adhesion to and migration on different extracellular matrix components. Inhibition of angiogenesis in vitro is demonstrated in the sprout-formation assay and in vivo in the chick embryo chorio-allantoic membrane angiogenesis assay. Comparison of active and inactive betapep sequences allows structure-function relationships to be deduced. Five hydrophobic residues and two lysines appear to be crucial to activity. This is the first report of a designed peptide having a well-defined biological function as a novel cytokine, which may be an effective anti-angiogenic agent for therapeutic use against various pathological disorders, such as neoplasia, rheumatoid arthritis, diabetic retinopathy and restenosis.

Published
2001
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30. Designed beta-sheet peptides that inhibit proliferation and induce apoptosis in endothelial cells.

Author

Mayo KH, van der Schaft DW, and Griffioen AW

Subjects
Amino Acid Sequence, Animals, Antimicrobial Cationic Peptides, Apoptosis drug effects, Blood Proteins chemistry, Cattle, Cell Division drug effects, Cells, Cultured, Drug Design, Humans, Interleukin-8 chemistry, Molecular Sequence Data, Peptides chemical synthesis, Platelet Factor 4 chemistry, Protein Structure, Secondary, Structure-Activity Relationship, Endothelium, Vascular cytology, Endothelium, Vascular drug effects, Membrane Proteins, Peptides chemistry, Peptides pharmacology
Abstract

Novel beta-sheet-forming peptide 33 mers, beta pep peptides, have been designed by using a combination approach employing basic folding principles and incorporating short sequences or proposed key residues from the beta-sheet domains of interleukin-8 (IL-8), platelet factor-4 (PF4) and bactericidal/permeability increasing protein (B/PI). Since PF4 and B/PI are anti-angiogenic and IL-8 is angiogenic, the library of 30 beta pep peptides was assayed for the ability to affect the growth of endothelial cells. Results indicate that five beta pep peptides (beta pep-2, 7, 8, 21 and 25) demonstrate greater than 50% anti-proliferative activity at 30 micrograms/ml, and one of those (beta pep-25) is similarly active at 10 micrograms/ml. Insight into the mechanism of action was probed in an apoptosis assay. Anti-proliferative activity was found to be correlated with the induction of apoptosis. For example, at 100 micrograms/ml beta pep-25 induces 85% of endothelial cells to undergo apoptosis within 2 days. These effects from beta pep peptides appear to be selective for endothelial cell (EC) because normal cells (fibroblasts and leukocytes) and various tumor cells are not significantly affected at peptide concentrations used in this study. Comparison of active and inactive beta pep sequences allows structure-function relationships to be deduced. Five hydrophobic residues and two lysines appear to be crucial to activity. This research contributes to the development of novel anti-angiogenic peptides.

Published
2001
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31. Bactericidal/permeability-increasing protein (BPI) inhibits angiogenesis via induction of apoptosis in vascular endothelial cells.

Author

van der Schaft DW, Toebes EA, Haseman JR, Mayo KH, and Griffioen AW

Subjects
Allantois blood supply, Animals, Antimicrobial Cationic Peptides, Apoptosis drug effects, Blood Proteins antagonists & inhibitors, Cell Division drug effects, Cells, Cultured, Chick Embryo, Chorion blood supply, DNA Fragmentation, Erythrocytes physiology, Fibroblast Growth Factor 2 pharmacology, Heparin pharmacology, Humans, Leukocytes physiology, Neovascularization, Physiologic drug effects, Umbilical Veins, Apoptosis physiology, Blood Bactericidal Activity, Blood Proteins pharmacology, Endothelium, Vascular cytology, Endothelium, Vascular physiology, Membrane Proteins, Neovascularization, Physiologic physiology
Abstract

Bactericidal/permeability-increasing protein (BPI) has been known for some time to function in killing bacteria and in neutralizing the effects of bacterial endotoxin lipopolysaccharide. In the present study, BPI is found to be a novel endogenous inhibitor of angiogenesis. Within the sub-muM range, BPI shows a concentration-dependent inhibition of endothelial cell (EC) proliferation that is mediated by cell detachment and subsequent induction of apoptosis. As measured by flow cytometric analysis of the percentage of subdiploid cells, apoptosis induction was half-maximal at about 250 nmol/L BPI. Apoptosis was confirmed by quantification of cells with nuclear fragmentation. Apoptosis was found to be EC specific. In an in vitro collagen gel-based angiogenesis assay, BPI at 1.8 micromol/L inhibited tube formation by 81% after only 24 hours. Evidence for in vivo inhibition of angiogenesis was obtained, using the chorioallantoic membrane assay in which BPI was seen to be significantly effective at concentrations as low as 180 nmol/L. This newly discovered function of BPI might provide a possible therapeutic modality for the treatment of various pathologic disorders that depend on angiogenesis.

Published
2000

32. Effect of culture conditions on endothelial cell growth and responsiveness.

Author

Relou IA, Damen CA, van der Schaft DW, Groenewegen G, and Griffioen AW

Subjects
Apoptosis drug effects, Apoptosis physiology, Blood Proteins pharmacology, Cell Division drug effects, Cell Division physiology, Cells, Cultured, Collagen pharmacology, Culture Media pharmacology, Endothelium, Vascular chemistry, Extracellular Matrix chemistry, Fibroblast Growth Factor 2 physiology, Fibronectins pharmacology, Gelatin pharmacology, Humans, Hyaluronan Receptors analysis, Hyaluronic Acid pharmacology, Intercellular Adhesion Molecule-1 analysis, Neovascularization, Physiologic physiology, Platelet Endothelial Cell Adhesion Molecule-1 analysis, Umbilical Veins cytology, Endothelium, Vascular cytology, Extracellular Matrix physiology
Abstract

The in vitro culture of endothelial cells (EC) is dependent on the presence of a coated surface and the availability of growth factors in the medium. The aim of the present research is to investigate whether in vitro EC culture conditions, such as serum source and surface coating, determine the growth characteristics of EC. The phenotype of EC was studied at the level of adhesion molecule expression and down-regulation by angiogenic factors. We found that human umbilical vein EC adhere well to and stretch well with plastic coated with fibronectin, collagen, gelatin and hyaluronan in contrast to non-coated plastic. While low in hyaluronan-coated wells, the spontaneous proliferation of EC was enhanced in fibronectin-collagen and gelatin-coated wells as compared to non-coated wells. Basic fibroblast growth factor bFGF-induced proliferation, however, was best on hyaluronan-coated plastic. A markedly up-regulated proliferation was measured on fibronectin and collagen while EC on gelatin-coated plastic only showed moderate bFGF-induced proliferation. On non-coated plastic EC were not inducible with bFGF. The induction of apoptosis by serum deprivation on these different matrices was most efficient when no coat was available or when wells were coated with hyaluronan, and bFGF inhibited apoptosis induction under all conditions. The use of different culture media demonstrated that human and bovine serum both can be used for human EC assays. The synthetic medium Utroser G prevented both spontaneous and growth factor-induced proliferation. We found that apart from some magnitude differences, the down-regulation of intercellular adhesion molecule-1 (ICAM-1) by angiogenic factors such as bFGF is not dependent on specific culture conditions.

Published
1998
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